/* =========================================== */
/*           SLIDE-OUT MENU STYLES           */
/* =========================================== */
/* --- Keep ALL slide-out menu styles --- */
.slide-menu {
  position: fixed !important;
  top: 0 !important;
  right: -300px !important;
  width: 300px !important;
  height: 100% !important;
  background-color: white !important;
  box-shadow: -5px 0 25px rgba(0, 0, 0, 0.15) !important;
  z-index: 2000 !important;
  transition: transform 0.3s ease !important;
  overflow-y: auto !important;
  display: flex;
  flex-direction: column;
}

/* Smart Hint Tooltip */
.smart-hint {
  position: fixed; /* Changed to fixed for viewport-relative positioning */
  background-color: #2c3e50;
  color: white;
  padding: 13px 20px; /* 30% increase */
  border-radius: 8px;
  font-size: 20.8px; /* 30% increase */
  font-weight: bold;
  font-family: 'Arial', sans-serif;
  z-index: 10000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
  pointer-events: none;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  transform: translateX(-50%);
}

.smart-hint.visible {
  opacity: 1;
  visibility: visible;
}

.smart-hint-content {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Tooltip Arrow */
.smart-hint::after {
  content: " ";
  position: absolute;
  top: 100%; /* At the bottom of the tooltip */
  left: 50%;
  margin-left: -8px;
  border-width: 8px;
  border-style: solid;
  border-color: #2c3e50 transparent transparent transparent;
}

/* Tooltip Arrow pointing up (for when tooltip is below the card) */
.smart-hint.tip-up::after {
  top: auto;
  bottom: 100%; /* At the top of the tooltip */
  border-color: transparent transparent #2c3e50 transparent;
}

.slide-menu.active {
  transform: translateX(-300px) !important;
}

/* Add top margin to all form groups in slide-out settings, except the first */
.slide-menu .settings-content .form-group {
  margin-top: 20px; /* Adjust this value for desired spacing */
}

/* Remove top margin from the very first form group (Layout) */
.slide-menu .settings-content .form-group:first-child {
  margin-top: 0;
}

.menu-overlay {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  width: 100% !important;
  height: 100% !important;
  background-color: rgba(0, 0, 0, 0.5) !important;
  z-index: 1500 !important;
  opacity: 0 !important;
  visibility: hidden !important;
  transition: opacity 0.3s ease, visibility 0.3s ease !important;
}

.menu-overlay.active {
  opacity: 1 !important;
  visibility: visible !important;
}

.menu-header {
  background: linear-gradient(135deg, #3060e4 0%, #02c8c8 100%);
  color: white;
  padding: 20px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 10;
  flex-shrink: 0;
}

.menu-header h2 {
  /* This was h3 in your JS, changed to h2 for consistency if you prefer */
  font-size: 20px;
  font-weight: 600;
  margin: 0;
}

.close-menu {
  background-color: rgba(255, 255, 255, 0.1);
  border: none;
  color: white;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  line-height: 1;
  padding: 0;
  transition: background-color 0.2s ease;
}

.close-menu:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.tab-scroll-container {
  position: relative;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  background-color: #f8fafc;
  border-bottom: 1px solid #e5e7eb;
  padding: 0 4px;
  flex-shrink: 0;
}

.tab-scroll-container::-webkit-scrollbar {
  display: none;
}

.menu-tabs {
  display: flex;
  min-width: 100%;
  position: relative;
}

.slide-tab {
  padding: 16px 20px;
  white-space: nowrap;
  background: none;
  border: none;
  cursor: pointer;
  font-weight: 500;
  color: #64748b;
  transition: color 0.2s ease;
  position: relative;
  z-index: 1;
  font-size: 15px;
}

.slide-tab.active {
  color: var(--menu-blue);
}

.tab-indicator {
  position: absolute;
  bottom: 0;
  height: 3px;
  background-color: var(--menu-blue);
  border-radius: 3px 3px 0 0;
  transition: left 0.3s ease, width 0.3s ease;
}

.slide-content {
  padding: 20px 16px;
  display: none;
  animation: fadeIn 0.3s ease;
  flex-grow: 1;
  overflow-y: auto;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.slide-content.active {
  display: block;
}

.settings-toggle {
  margin-top: 15px;
  margin-bottom: 10px;
  border-top: 1px solid #e5e7eb;
  padding-top: 15px;
}

.settings-toggle-btn {
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  padding: 10px 0;
  font-size: 15px;
  font-weight: 500;
  color: #4b5563;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.settings-toggle-btn .toggle-icon {
  transition: transform 0.3s ease;
  width: 16px;
  height: 16px;
  stroke: currentColor;
}

.settings-toggle-btn.expanded .toggle-icon {
  transform: rotate(180deg);
}

.settings-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  padding: 0;
}

.settings-content.expanded {
  max-height: 600px;
  padding-top: 10px;
}

.slide-menu .form-group {
  margin-bottom: 20px;
  padding-left: 20px;
  padding-right: 20px;
}

.slide-menu .form-label {
  display: block;
  font-size: 14px;
  color: #4b5563;
  margin-bottom: 6px;
  font-weight: 500;
}

.slide-menu .form-select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 6px;
  border: 1px solid #d1d5db;
  background-color: white;
  font-size: 14px;
  font-family: inherit; /* Safari fix: inherit sans-serif font */
  color: #1f2937;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23555' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
}

.slide-menu .btn {
  width: 100%;
  padding: 12px 16px;
  margin-top: 10px;
  margin-bottom: 10px;
  background-color: var(--button-blue);
  color: white;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.slide-menu .btn:hover {
  background-color: var(--button-blue-hover);
}

.slide-menu .icon-controls {
  display: flex;
  gap: 8px;
  margin-top: 6px;
}

.slide-menu .icon-button {
  flex: 1;
  padding: 8px 12px;
  background-color: #f3f4f6;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  font-size: 14px;
  color: #4b5563;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  transition: all 0.2s ease;
  min-height: 60px;
  justify-content: center;
}

.slide-menu .icon-button.active {
  background-color: var(--button-blue);
  color: white;
  border-color: var(--button-blue);
}

.slide-menu .icon-button .icon-label {
  font-size: 11px;
  line-height: 1.2;
}

.slide-menu .icon-button svg {
  display: inline-block;
  width: 20px;
  height: 20px;
  stroke-width: 2;
  stroke: currentColor;
  fill: none;
  flex-shrink: 0;
  margin: 0;
  padding: 0;
}

/* --- End Slide-Out Menu Styles --- */

/* =========================================== */
/*              BASE & LAYOUT STYLES           */
/* =========================================== */
:root {
  --desktop-menu-bar-height: 65px;
  --mobile-menu-bar-height: 60px;
  --menu-blue: #607bf1;
  --panel-blue: #e7eeff;
  --button-blue: #568bff;
  --button-blue-hover: #5178d9;
  --button-green: #16a34a;
  --button-green-hover: #15803d;
  --score-yellow: #333;
  --score-bg: rgba(255, 255, 255, 0.8);

  /* ========================================= */
  /*          CENTRAL COLOR PALETTE           */
  /* ========================================= */
/* Base colors - change these to experiment with different color schemes */
--color-blue-dark: #1564dc;
--color-blue-light: #70a7ef;
--color-orange-dark: #FFCD82;
--color-orange-light: #FFF3D6;
--color-green-dark: #16a34a;
--color-green-light: #86efac;
--color-purple-dark: #7c3aed;
--color-purple-light: #c4b5fd;
--color-teal-dark: #bd354e;
--color-teal-light: #fc95b4;
--color-face-down-dark: #FFCD82;
--color-face-down-light: #FFF3D6;
--color-matched-bg: #69D06D;
--color-matched-text: #19712C;

  /* ========================================= */
  /*        SEMANTIC COLOR ASSIGNMENTS        */
  /* ========================================= */
  /* These control which colors are used where - experiment by swapping the values */
  
  /* Face-down cards (the ? cards) */
  --facedown-card-primary: var(--color-face-down-dark);
  --facedown-card-secondary: var(--color-face-down-light);
  
  /* Practice Mode: Equations and Results */
  --practice-equation-primary: var(--color-blue-dark);
  --practice-equation-secondary: var(--color-blue-light);
  --practice-result-primary: var(--color-green-dark);
  --practice-result-secondary: var(--color-green-light);
  
  /* Match Equations Mode: Questions (visible) and Answers (hidden initially) */
  --match-eq-visible-primary: var(--color-blue-dark);
  --match-eq-visible-secondary: var(--color-blue-light);
  --match-eq-hidden-primary: var(--color-orange-dark);
  --match-eq-hidden-secondary: var(--color-orange-light);
  
/* Match Results Mode: Answers (visible) and Questions (hidden initially) */
--match-res-visible-primary: var(--color-purple-dark);
--match-res-visible-secondary: var(--color-purple-light);
--match-res-hidden-primary: var(--color-orange-dark);
--match-res-hidden-secondary: var(--color-orange-light);
  
/* Find Factors Mode: Questions (visible) and Factors (hidden initially) */
--find-factors-visible-primary: var(--color-teal-dark);
--find-factors-visible-secondary: var(--color-teal-light);
--find-factors-hidden-primary: var(--color-orange-dark);
--find-factors-hidden-secondary: var(--color-orange-light);
  
  /* Matched cards (same for all modes) */
  --matched-card-bg: var(--color-matched-bg);
  --matched-card-text: var(--color-matched-text);
}

html {
  height: 100%;
  background: transparent;
  transition: background 0.3s ease;
  overflow: hidden; /* Prevent body scrollbars */
}

body {
  font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Heiti SC", "WenQuanYi Micro Hei", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px 20px; /* Remove top padding */
  background: transparent;
  position: relative;
  transition: none;
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden; /* Prevent body scrollbars */
}

/* Safari fix: form elements don't inherit font-family by default */
select, input, textarea, button {
  font-family: inherit;
}

.times-tables-app-container {
  background-color: transparent;
  width: 100%;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  flex-grow: 1; /* Allow container to grow */
  padding-top: calc(var(--desktop-menu-bar-height) + 10px); /* Add padding here */
  min-height: 0; /* Flexbox fix for overflow */
}

.header {
  text-align: center;
  margin-bottom: 30px;
}

/* =========================================== */
/*           MENU BAR & DESKTOP STYLES         */
/* =========================================== */
.menu-container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: linear-gradient(135deg, #3060e4 0%, #02c8c8 100%);
  z-index: 1500;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  color: white;
  transition: background 0.3s ease;
}

.menu-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 15px;
  height: var(--desktop-menu-bar-height);
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

.menu-bar-left {
  display: flex;
  align-items: center;
  gap: 20px;
  position: relative;
}

.menu-bar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.app-logo {
  height: 45px;
  vertical-align: middle;
  flex-shrink: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center center;
  position: relative;
  z-index: 1;
}

.mobile-mode-label {
  display: none;
}

.app-logo.emoji-active {
  transform: scale(1.4) translateY(1px) translateX(7px);
  z-index: 10;
}

.tab-buttons button {
  background: none;
  border: none;
  color: white;
  padding: 8px 16px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  border-radius: 6px;
  transition: background-color 0.3s ease, color 0.3s ease, opacity 0.3s ease;
  opacity: 0.7;
}

.tab-buttons button.active-tab {
  background-color: rgba(255, 255, 255, 0.2);
  opacity: 1;
}

.tab-buttons button:hover:not(.active-tab) {
  background-color: rgba(255, 255, 255, 0.1);
  opacity: 0.9;
}

.icon-button {
  background: none;
  border: none;
  color: white;
  padding: 8px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.3s ease;
  width: 40px;
  height: 40px;
}

.icon-button:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.icon-button i,
.icon-button svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
}

#mobileMenuToggle {
  display: none;
  z-index: 1505;
}

body.no-scroll {
  overflow: hidden;
}

.settings-container {
  position: relative;
}

#settingsDropdown {
  position: absolute;
  top: calc(var(--desktop-menu-bar-height) - 10px);
  right: 10px;
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
  padding: 10px;
  padding-bottom: 15px;
  z-index: 1510;
  display: none;
  flex-direction: column;
  gap: 5px;
  min-width: 220px;
  max-width: 300px;
}

#settingsDropdown.expanded {
  display: flex;
}

/* Styles for original settings buttons (Layout, Sound) - keep if they are still buttons */
#settingsDropdown button {
  background: none;
  border: none;
  color: #333;
  padding: 10px 15px;
  font-size: 15px;
  cursor: pointer;
  border-radius: 6px;
  transition: background-color 0.3s ease;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
}

#settingsDropdown button:hover {
  background-color: #f0f0f0;
}

#settingsDropdown button i,
#settingsDropdown button svg {
  width: 20px;
  height: 20px;
  color: #555;
  stroke: currentColor;
  flex-shrink: 0;
}

#settingsDropdown button .setting-text {
  flex-grow: 1;
}
/* End styles for original settings buttons */

/* NEW/MODIFIED: Styling for the subscription display link if needed */
.subscription-display-link {
  /* Applied to the <a> tag */
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px; /* Space between icon and text block */
  cursor: pointer;
  width: 100%;
  padding: 10px 0; /* Adjust as needed for desktop */
  color: #333; /* Base text color */
  font-size: 15px;
  border-radius: 6px; /* For hover effect consistency */
  transition: background-color 0.2s ease;
}
.subscription-display-link:hover {
  background-color: #f0f0f0; /* Consistent hover with other buttons */
}

.subscription-display-link img {
  /* For desktopSubscriptionIcon and mobileSubscriptionIcon */
  width: 20px;
  height: 20px;
  flex-shrink: 0; /* Prevent icon from shrinking */
  object-fit: contain; /* Ensure aspect ratio is maintained */
}

.subscription-display-link #desktopSubscriptionText,
.subscription-display-link #mobileSubscriptionText {
  flex-grow: 1; /* Allow main text to take available space */
}

.subscription-display-link #desktopSubscriptionActionText,
.subscription-display-link #mobileSubscriptionActionText {
  color: #3b82f6; /* Blue color for "Subscribe" / "Manage" */
  font-weight: 500;
  margin-left: auto; /* Push to the right */
  white-space: nowrap; /* Prevent wrapping */
}
/* END NEW/MODIFIED */

#settingsDropdown .settings-section {
  border-top: 1px solid #eaeaea;
  margin-top: 8px;
  padding-top: 8px;
  width: 100%;
}

#settingsDropdown .settings-heading {
  font-size: 14px;
  color: #666;
  margin: 5px 0 10px 0;
  font-weight: 600;
  padding: 0 15px;
}

#settingsDropdown .settings-select {
  width: calc(100% - 30px);
  margin: 5px 15px 0;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid #ddd;
  background-color: white;
  font-size: 14px;
  font-family: inherit; /* Safari fix: inherit sans-serif font */
  cursor: pointer;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23555' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  color: #333;
}

#soundToggle #soundOnIcon,
#mobileSoundToggle #mobileSoundOnIcon {
  display: inline-block !important;
}
#soundToggle #soundOffIcon,
#mobileSoundToggle #mobileSoundOffIcon {
  display: none !important;
}
#soundToggle.sound-is-off #soundOnIcon,
#mobileSoundToggle.sound-is-off #mobileSoundOnIcon {
  display: none !important;
}
#soundToggle.sound-is-off #soundOffIcon,
#mobileSoundToggle.sound-is-off #mobileSoundOffIcon {
  display: inline-block !important;
}
#layoutToggle.layout-is-landscape #layoutIcon,
#mobileLayoutToggle.layout-is-landscape #mobileLayoutIcon {
  transform: rotate(90deg);
}
#layoutToggle #layoutIcon,
#mobileLayoutToggle #mobileLayoutIcon,
#layoutToggle.layout-is-landscape #layoutIcon,
#mobileLayoutToggle.layout-is-landscape #mobileLayoutIcon {
  transition: transform 0.3s ease;
}

.score {
  font-weight: 700;
  color: #333; /* Dark text for white score background */
  background-color: var(--score-bg);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
  padding: 5px 5px 5px 10px;
  border-radius: 20px;
  font-size: 14px;
  min-width: 210px;
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  white-space: nowrap;
  transition: all 0.3s ease;
  transform: scale(1.2);
  transform-origin: center;
}

#scoreDisplay {
  margin-left: 5px;
  margin-right: 20px; /* Space between score element and settings icon */
}

#mobileScoreDisplay {
  margin-left: 0;
  margin-right: 5px;
}

.score.visible {
  display: flex !important; /* Ensure visibility override works */
}

.score-item {
  display: flex;
  align-items: center;
  gap: 5px;
}

.score-icon-wrapper {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  /* background-color has been removed to prevent fill effect */
  border-radius: 50%;
  width: 20px;
  height: 20px;
}

/* Obsolete rules removed as SVG now handles its own styling */

.score-item-value {
  font-weight: 600;
  font-size: 15px;
}

.score-item-value.incorrect {
  color: #dc3545; /* Red for incorrect count on white background */
}

/* Score coin counter (replaces streak emoji) */
.score-coin-item {
  display: flex;
  align-items: center;
  justify-content: center;
}

.score-coin-icon {
  transition: transform 0.3s ease;
}

.score-coin-icon.streak-upgrade {
  animation: coinEarned 0.6s ease;
}

.score-coin-icon.streak-broken {
  animation: streakBroken 0.6s ease;
}

@keyframes coinEarned {
  0% {
    transform: scale(1);
  }
  30% {
    transform: scale(1.8);
  }
  60% {
    transform: scale(0.9);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes streakBroken {
  0% {
    transform: scale(1) rotate(0deg);
    opacity: 1;
  }
  50% {
    transform: scale(0.8) rotate(15deg);
    opacity: 0.5;
  }
  100% {
    transform: scale(1) rotate(0deg);
    opacity: 1;
  }
}

/* Score progress bar - dark bg matches overview pill style */
.score-progress-bar {
  position: relative;
  width: 70px;
  height: 28px;
  background-color: #06143B;
  border-radius: 14px;
  overflow: hidden;
  flex-shrink: 0;
}

.score-progress-bar .progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  border-radius: 14px;
  transition: width 0.3s ease;
}

.score-progress-bar .progress-text {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: normal;
  font-family: sans-serif;
  letter-spacing: 0.5px;
  color: white;
  z-index: 1;
}

.menu-panel-container {
  background-color: var(--panel-blue);
  padding: 0;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-in-out, padding 0.4s ease-in-out,
    border-top 0.4s ease-in-out;
  border-top-color: transparent;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  box-sizing: border-box;
}
.menu-panel-container.visible {
  max-height: 650px;
  padding: 10px 20px 20px;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}
.menu-panel-container.visible.dropdown-open {
  overflow: visible;
}
.menu-panel {
  display: none;
  align-items: center;
  gap: 15px;
  min-height: 65px;
}
.menu-panel.visible {
  display: flex;
}

.table-selector {
  border-radius: 6px;
  border: 1px solid #ccc;
  font-size: 15px;
  font-family: inherit; /* Safari fix: inherit sans-serif font */
  color: #333;
  font-weight: 500;
  background-color: white;
  min-width: 120px;
  flex-shrink: 1;
  height: 40px;
  box-sizing: border-box;
  padding: 0 10px;
  padding-right: 30px;
  line-height: normal;
  vertical-align: top;
  display: inline-flex;
  align-items: center;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23555' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}
#practiceModeSelectUnique {
  min-width: 120px;
}
#gamesModeSelectUnique {
  min-width: 180px;
}

.play-button {
  padding: 8px 20px;
  color: white;
  background-color: var(--button-blue);
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  min-width: 100px;
  white-space: nowrap;
  transition: all 0.3s ease;
  flex-shrink: 0;
  height: 40px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 8px 0 0 0;
  vertical-align: baseline;
}

.play-button:hover {
  background-color: var(--button-blue-hover);
}
#playAgainButtonUnique {
  background-color: var(--button-green);
}
#playAgainButtonUnique:hover {
  background-color: var(--button-green-hover);
}

/* =========================================== */
/*           COLOR SLIDER STYLES               */
/* =========================================== */
.color-slider-group {
  margin-top: 15px;
  padding: 0 15px;
  box-sizing: border-box;
}
.color-slider-label {
  display: block;
  font-size: 14px;
  color: #4b5563;
  margin-bottom: 8px;
  font-weight: 500;
}
.color-slider-container {
  position: relative;
  margin-bottom: 10px;
  height: 30px;
}
.color-slider-track {
  height: 22px;
  border-radius: 11px;
  background: linear-gradient(
    to right,
    hsl(0, 80%, 55%),
    hsl(30, 80%, 55%),
    hsl(60, 80%, 55%),
    hsl(90, 80%, 55%),
    hsl(120, 80%, 55%),
    hsl(150, 80%, 55%),
    hsl(180, 80%, 55%),
    hsl(210, 80%, 55%),
    hsl(240, 80%, 55%),
    hsl(270, 80%, 55%),
    hsl(300, 80%, 55%),
    hsl(330, 80%, 55%),
    hsl(360, 80%, 55%)
  );
  border: 2px solid rgba(0, 0, 0, 0.1);
  cursor: pointer;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.15),
              0 1px 2px rgba(0, 0, 0, 0.08);
  position: absolute;
  width: 100%;
  top: 50%;
  transform: translateY(-50%);
}
.color-slider-handle {
  position: absolute;
  width: 10px;
  height: 30px;
  border: 3px solid white;
  border-radius: 6px;
  background-color: #3498db;
  top: 50%;
  left: 66.67%;
  transform: translate(-50%, -50%);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  cursor: grab;
  z-index: 10;
  transition: background-color 0.1s ease;
}
.color-slider-handle:active {
  cursor: grabbing;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.4);
}

/* =========================================== */
/*           GRID & CARD STYLES                */
/* =========================================== */
.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px; /* Increased gap */
  position: relative;
  z-index: 50;
  box-sizing: border-box;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  /* NOTE: `contain: layout` was removed — it triggered a Safari paint bug
     on language-URL arrivals (/cn/, /jp/ etc.) where card background
     gradients (which use CSS custom properties via var()) rendered
     transparent until a resize or orientation toggle forced a repaint.
     The containment optimization isn't worth the broken initial paint. */
  flex-grow: 1; /* Allow grid to fill space */
  grid-auto-rows: minmax(0, 1fr); /* Make rows flexible */
  padding-bottom: 30px; /* Add padding to prevent cropping */
}

.grid.landscape {
  grid-template-columns: repeat(6, 1fr);
}

/* Chrome-specific grid fixes */
@supports (-webkit-appearance: none) {
  .grid {
    width: 100% !important;
    min-width: 100% !important;
    flex-shrink: 0 !important;
  }
}

/* Only apply grid display when Practice or Games tabs are active */
body:not([data-active-tab="progress"]) .grid {
  display: grid;
}

/* Force hide grid when Progress tab is active */
body[data-active-tab="progress"] .grid {
  display: none !important;
}

/* Ensure progress content shows when Progress tab is active */
body[data-active-tab="progress"] #progressTabContent {
  display: block !important;
}

.card {
  cursor: pointer;
  opacity: 1;
  visibility: visible;
  transform: scale(1);
  filter: grayscale(0%);
  transition: transform 0.4s ease-out;
  display: flex; /* Use flexbox for centering */
  flex-direction: column;
  justify-content: center;
  min-height: 0; /* Flexbox fix for overflow */
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  border-radius: 8px;
  display: flex; /* Ensure inner content can be centered */
  flex-direction: column;
  justify-content: center;
}

.card-front,
.card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border-radius: 8px;
  border: 3px solid white;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.34);
  background-color: #fff;
  transition: opacity 0.3s ease;
  overflow: hidden;
  height: 100%; /* Ensure the front and back fill the card-inner */
}

.card-back {
  z-index: 1;
  opacity: 0;
}

/* NOTE: The actual .card-front background is defined later in this file
   (search: "Face-down cards"). A previous duplicate rule here used undefined
   CSS variables `--card-front-color-1/2`, which resolved to invalid-at-
   computed-value and caused Safari to paint cards transparent on language-
   URL arrivals (the later rule was ignored once Safari cached the invalid
   one on a composited layer). Removed — do not re-add. */

.card-front .card-content {
  display: flex;
  justify-content: center;
  align-items: center;
  width: clamp(40px, 8vmin, 70px); /* Responsive width with min/max */
  height: clamp(40px, 8vmin, 70px); /* Responsive height with min/max */
  border-radius: 50%;
  color: #C43E00; /* colour of the ? character */
  font-size: clamp(24px, 5vmin, 40px); /* Responsive font size with min/max */
  font-weight: 700;
  line-height: 1;
  text-align: center;
  margin: 0;
  padding: 0;
  background: #ffffff;  /* colour of ? circle */
  background-size: 300% 100%;
  animation: animatedGradient 10s linear infinite;
  position: relative;
  z-index: 2; /* Sit above bubbles */
}

.card.flipped .card-front {
  opacity: 0;
  z-index: 1;
  pointer-events: none;
}
.card.flipped .card-back {
  opacity: 1;
  z-index: 2;
  pointer-events: auto;
}


.card-back .card-content {
  width: 100%;
  height: 100%;
  border-radius: 0;
  background-color: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1.1; /* Tighter line height for wrapped text */
  text-align: center;
  font-size: clamp(20px, 6vw, 48px);
  font-weight: 700;
  padding: 5px; /* Slightly reduce padding to maximize space */
  box-sizing: border-box;
  overflow-wrap: break-word; /* Allow long words to break */
  word-break: break-word; /* For better browser compatibility */
}

.card-back .card-content span {
  display: block; /* Change to block to allow wrapping */
  width: 100%; /* Take full width of the content area */
  transition: transform 0.3s ease, color 0.3s ease;
  transform: scale(1);
  color: inherit;
  white-space: normal; /* Ensure text wraps */
}


.card-back .card-content span.js-pulse-active {
  display: inline-block !important;
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), color 0.3s ease !important;
  transform-origin: center center !important;
  transform: scale(1.7) !important;
}

.card-back.card-question .card-content span.js-pulse-active {
  color: white !important;
  text-shadow: none;
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), color 0.3s ease !important;
}

.card-back.card-answer .card-content span.js-pulse-active {
  color: white !important;
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), color 0.3s ease !important;
}

@keyframes animatedGradient {
  0% {
    background-position: 0 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  to {
    background-position: 0 50%;
  }
}

/* =========================================== */
/*           RISING BUBBLES EFFECT             */
/* =========================================== */

/* Bubbles hidden by default — shown when body.bubbles-enabled */
/* Uses .card-bubble / .cb* to avoid collision with aquarium .bubble class */
.card-bubble {
  display: none;
}

body.bubbles-enabled .card:not(.flipped):not(.matched) .card-bubble {
  display: block;
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(255,255,255,0.95), rgba(255,255,255,0.3));
  border: 1px solid rgba(255,255,255,0.5);
  box-shadow: 0 0 3px rgba(255,255,255,0.4);
  z-index: 1;
  animation-name: bubbleRise;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}

/* Individual bubble sizes, positions, speeds, and offsets */
body.bubbles-enabled .cb1 { width: 10px; height: 10px; left: 15%; animation-duration: 5.5s; animation-delay: 0s; }
body.bubbles-enabled .cb2 { width: 6px;  height: 6px;  left: 40%; animation-duration: 7s;   animation-delay: -1.5s; }
body.bubbles-enabled .cb3 { width: 14px; height: 14px; left: 70%; animation-duration: 6s;   animation-delay: -3s; }
body.bubbles-enabled .cb4 { width: 8px;  height: 8px;  left: 55%; animation-duration: 8s;   animation-delay: -0.8s; }
body.bubbles-enabled .cb5 { width: 5px;  height: 5px;  left: 25%; animation-duration: 6.5s; animation-delay: -4s; }
body.bubbles-enabled .cb6 { width: 11px; height: 11px; left: 82%; animation-duration: 7.5s; animation-delay: -2.2s; }
body.bubbles-enabled .cb7 { width: 7px;  height: 7px;  left: 8%;  animation-duration: 5s;   animation-delay: -5s; }
body.bubbles-enabled .cb8 { width: 4px;  height: 4px;  left: 48%; animation-duration: 9s;   animation-delay: -6s; }

/* Rising animation — uses percentage-based `top` for vertical movement so
   bubbles scale to any card height. transform handles wobble/scale only. */
@keyframes bubbleRise {
  0%   { top: 105%; transform: translateX(0px) scale(0.6); opacity: 0; }
  8%   { opacity: 0.85; }
  50%  { top: 40%;  transform: translateX(6px) scale(0.9); opacity: 0.95; }
  90%  { opacity: 0.7; }
  100% { top: -10%; transform: translateX(-4px) scale(1); opacity: 0; }
}

/* Hide bubbles on flipped and matched cards */
.card.flipped .card-bubble,
.card.matched .card-bubble {
  display: none !important;
}

.grid.preview-playing .card:not(.highlight-pair) {
  opacity: 0.4 !important;
  filter: grayscale(80%);
  transition: opacity 0.3s ease, filter 0.3s ease;
  pointer-events: none;
}
.grid.preview-playing .card.highlight-pair {
  z-index: 10;
  opacity: 1 !important;
  filter: none !important;
  transition: all 0.3s ease;
  pointer-events: auto !important;
}
.grid.preview-playing .card.highlight-pair.dim-card {
  opacity: 1 !important;
  filter: none !important;
}
.card.fade-question {
  opacity: 0.3 !important;
  filter: grayscale(90%) !important;
  pointer-events: none !important;
  animation: fadeToGrey 0.4s forwards;
}
@keyframes fadeToGrey {
  0% {
    opacity: 1;
    filter: grayscale(0%);
  }
  to {
    opacity: 0.3;
    filter: grayscale(90%);
  }
}
.card.fade-question:hover {
  transform: none !important;
}
.card.fade-question:hover .card-front {
  background-color: #ededed !important;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1) !important;
}
.card.matched {
  opacity: 1 !important;
  cursor: default;
}

.card.matched:hover .card-back {
  transform: none !important;
}
.card.matched:hover .card-content {
  transform: none !important;
  color: var(--matched-text) !important;
}
.card.matched:hover .card-content span {
  color: var(--matched-text) !important;
  transform: none !important;
}

.card.waiting-for-match .card-inner {
  animation: subtlePulse 0.5s infinite ease-in-out;
  box-shadow: 0 0 10px 4px rgba(255, 136, 0, 0.8);
  border-radius: 8px;
  transition: box-shadow 0.3s ease;
}
.card.waiting-for-match {
  z-index: 5;
}
@keyframes subtlePulse {
  0%,
  to {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}
.card.initial-hidden {
  opacity: 0;
  transform: scale(0.8);
  pointer-events: none;
}
@keyframes cardFadeIn {
  0% {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}
.card.fade-in {
  animation: cardFadeIn 0.4s ease forwards;
  pointer-events: auto;
}
.card.card-mismatch-flash .card-inner .card-back,
.card.card-mismatch-flash .card-inner .card-front {
  animation: backgroundFlash 0.6s ease;
}
@keyframes shake {
  0%, 100% {
    transform: translateX(0);
  }
  10%, 30%, 50%, 70%, 90% {
    transform: translateX(-8px);
  }
  20%, 40%, 60%, 80% {
    transform: translateX(8px);
  }
}
.card.wobble {
  animation: shake 0.5s ease;
}
@keyframes backgroundFlash {
  0%,
  to {
    background-color: inherit;
  }
  50% {
    background-color: rgba(255, 200, 200, 0.8);
  }
}
.card:not(.flipped):not(.matched):not(.fade-question):hover .card-front {
  background-color: #f2d6b2;
  box-shadow: 0 6px 12px rgba(59, 130, 246, 0.15);
  transform: translateY(-3px);
  transition: all 0.2s ease;
}
.grid[data-mode="table"]:not(.preview-playing) .card.highlight-pair {
  opacity: 1 !important;
  filter: none;
  transform: scale(1.03);
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.4);
  z-index: 10;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease,
    filter 0.2s ease;
}

.card-content span:not(:hover) {
  transform: scale(1);
  color: inherit;
  transition: transform 0.3s ease, color 0.3s ease;
}
.grid.idle-highlight-active .card:not(.highlight-pair) {
  opacity: 0.4;
  filter: grayscale(80%);
  transition: opacity 0.3s ease, filter 0.3s ease;
  pointer-events: none;
}

/* =========================================== */
/*           OTHER UI ELEMENTS                 */
/* =========================================== */
.message {
  position: absolute;
  top: calc(var(--desktop-menu-bar-height) + 100px);
  left: 50%;
  transform: translateX(-50%);
  background: #fef3c7; /* Pastel amber */
  color: #1a1a1a; /* Black text */
  padding: 15px 25px;
  padding-right: 40px;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
  z-index: 1600;
  font-size: 18px;
  text-align: center;
  display: none;
  line-height: 1.5;
  max-width: 90%;
  border: 1px solid #fcd34d;
}

/* All message types use the same pastel amber style */
.message.message-success,
.message.message-info,
.message.message-warning {
  background: #fef3c7;
  border-color: #fcd34d;
}
.message-close {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-weight: 700;
  color: #e53e3e;
  font-size: 14px;
  transition: transform 0.2s, color 0.2s;
}
.message-close:hover {
  color: #c53030;
  animation: xPulse 0.8s infinite;
}
@keyframes xPulse {
  0%,
  to {
    transform: scale(1);
  }
  50% {
    transform: scale(1.3);
  }
}
.score-thumbs-up {
  opacity: 1;
  transition: opacity 0.3s ease;
  margin-right: 5px;
}
.score-thumbs-up.fade-out {
  opacity: 0;
}
@keyframes scorePulseSimple {
  0%,
  to {
    transform: scale(1);
  }
  50% {
    transform: scale(1.15);
  }
}
.score-pulse {
  animation: scorePulseSimple 0.7s ease;
}
@keyframes scoreRedFlash {
  0%,
  to {
    background-color: var(--score-bg);
  }
  50% {
    background-color: rgba(255, 100, 100, 0.9);
  }
}
@keyframes scoreTextRedFlash {
  0%,
  to {
    color: var(--score-yellow);
  }
  50% {
    color: #dc3545 !important;
  }
}
#scoreDisplay.score-red-flash,
#mobileScoreDisplay.score-red-flash {
  animation: scoreRedFlash 0.8s ease;
}
#scoreDisplay.score-text-red-flash,
#mobileScoreDisplay.score-text-red-flash {
  animation: scoreTextRedFlash 0.8s ease;
}
@keyframes highlight {
  0%,
  to {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}
.highlight-match {
  animation: highlight 1s ease;
}
@keyframes jiggleButton {
  0%,
  to {
    transform: rotate(0deg) scale(1);
  }
  10% {
    transform: rotate(-3deg) scale(1.05);
  }
  20% {
    transform: rotate(3deg) scale(1.1);
  }
  30% {
    transform: rotate(-2deg) scale(1.05);
  }
  40% {
    transform: rotate(2deg) scale(1);
  }
  50% {
    transform: rotate(0deg) scale(1.05);
  }
  60% {
    transform: rotate(-1deg) scale(1);
  }
  70% {
    transform: rotate(1deg) scale(1.02);
  }
  80% {
    transform: rotate(0deg) scale(1);
  }
}
.jiggle-button {
  animation: jiggleButton 1.5s ease;
}
.loading-indicator {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(0, 0, 0, 0.7);
  color: #fff;
  padding: 15px 25px;
  border-radius: 8px;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  font-size: 16px;
}
.loading-indicator.visible {
  opacity: 1;
  visibility: visible;
}
.loading-dots::after {
  content: " .";
  animation: loadingDots 1s steps(5, end) infinite;
}
@keyframes loadingDots {
  0%,
  20% {
    color: transparent;
    text-shadow: 0.25em 0 0 transparent, 0.5em 0 0 transparent;
  }
  40% {
    color: #fff;
    text-shadow: 0.25em 0 0 transparent, 0.5em 0 0 transparent;
  }
  60% {
    text-shadow: 0.25em 0 0 #fff, 0.5em 0 0 transparent;
  }
  80%,
  to {
    text-shadow: 0.25em 0 0 #fff, 0.5em 0 0 #fff;
  }
}

/* =========================================== */
/*           SLIDESHOW & MODALS                */
/* =========================================== */
.grid.hidden-for-slideshow {
  visibility: hidden;
  pointer-events: none;
}

#slideshowContainer {
  position: absolute;
  left: 0;
  width: 100%;
  background-color: #35419bb4;
  z-index: 1000;
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 0;
  box-sizing: border-box;
  overflow: auto;
  margin-top: 0;
}
.slideshow-inner-container {
  width: 100%;
  height: 100%;
  max-width: 1000px;
  background-color: transparent;
  border-radius: 15px;
  padding: 0;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 500px;
}
#slideshowQuestionCard .card-content span,
#slideshowAnswerCard .card-content span {
  display: inline-block;
  transition: transform 0.3s ease, color 0.3s ease;
  transform: scale(1);
  color: inherit;
}
#slideshowQuestionCard .card-content span.js-pulse-active,
#slideshowAnswerCard .card-content span.js-pulse-active {
  display: inline-block !important;
  transition: transform 0.3s ease, color 0.3s ease;
  transform-origin: center center;
  transform: scale(1.8) !important;
}
#slideshowQuestionCard .card-content span.js-pulse-active {
  color: #3b82f6 !important;
}
#slideshowAnswerCard .card-content span.js-pulse-active {
  color: #22c55e !important;
}
.slideshow-content {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: 30px;
  width: 100%;
  max-width: 800px;
  padding: 10px;
  box-sizing: border-box;
  position: relative;
}
.slideshow-card {
  flex: 1;
  min-width: 250px;
  max-width: 380px;
  height: auto;
  min-height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border-radius: 12px;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
  background-color: #fff;
  padding: 40px 25px;
  box-sizing: border-box;
  text-align: center;
}
#slideshowQuestionCard {
  border-top: 6px solid #3b82f6;
}
#slideshowAnswerCard {
  border-top: 6px solid #22c55e;
}
.slideshow-card .card-type {
  font-size: 16px;
  color: #fff;
  padding: 6px 12px;
  border-radius: 14px;
  margin-bottom: 15px;
  display: inline-block;
}
#slideshowQuestionCard .card-type {
  background-color: #3b82f6;
}
#slideshowAnswerCard .card-type {
  background-color: #22c55e;
}

/* Enhanced slideshow card content - IMPROVED VERSION */
.slideshow-card .card-content {
  font-weight: 700;
  margin-bottom: 0;
  color: #333;
  width: 100%;
  display: flex;
  flex-grow: 1;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 15px;
  box-sizing: border-box;
}

.slideshow-card .card-content span {
  text-align: center !important;
  word-wrap: break-word !important;
  hyphens: auto !important;
  max-width: 100% !important;
  line-height: 1.2 !important;
}

/* Dynamic font sizing - no fixed sizes */
#slideshowQuestionCard .card-content {
  font-size: 48px; /* Base size, will be adjusted by JavaScript */
}
#slideshowAnswerCard .card-content {
  font-size: 120px; /* Base size, will be adjusted by JavaScript */
}

/* Language-specific slideshow adjustments */
html[lang="th"] .slideshow-card .card-content span,
html[lang="en"] .slideshow-card .card-content span,
html[lang="es"] .slideshow-card .card-content span,
html[lang="hi"] .slideshow-card .card-content span {
  font-weight: 300 !important;
  letter-spacing: 0.5px !important;
}

html[lang="zh"] .slideshow-card .card-content span,
html[lang="ja"] .slideshow-card .card-content span,
html[lang="ko"] .slideshow-card .card-content span {
  font-weight: 400 !important;
  letter-spacing: 1px !important;
}

/* Better responsive behavior for slideshow cards */
@media (max-width: 480px) {
  .slideshow-card .card-content {
    padding: 10px !important;
  }
  .slideshow-card {
    padding: 30px 15px;
    min-height: 250px;
  }
}

@media (max-width: 768px) {
  .slideshow-content {
    flex-direction: column;
    gap: 20px;
  }
  .slideshow-card {
    max-width: 100%;
  }
}

.slideshow-card .visual {
  font-size: 60px;
  font-weight: 500;
  margin-top: auto;
  padding-top: 15px;
  width: 100%;
  line-height: 1.4;
}
.slideshow-card .visual div {
  white-space: normal !important;
  word-wrap: break-word;
}
.slideshow-nav-btn {
  position: absolute;
  background-color: rgba(0, 0, 0, 0.6);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: background-color 0.3s ease;
  z-index: 1010;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}
.slideshow-nav-btn:hover,
#slideshowClose:hover {
  background-color: rgba(0, 0, 0, 0.6);
}

/* Fix for dimming matched cards */
.card.matched.fade-question {
  opacity: 0.3 !important;
  filter: grayscale(90%) !important;
}
#slideshowPrev {
  top: 50%;
  transform: translateY(-50%);
  left: -25px;
}
#slideshowNext {
  top: 50%;
  transform: translateY(-50%);
  right: -25px;
}
#slideshowClose {
  top: 15px;
  right: 15px;
  transform: none;
  width: 40px;
  height: 40px;
  position: absolute;
  background-color: rgba(0, 0, 0, 0.4);
  color: #fff;
  border: none;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: background-color 0.3s ease;
  z-index: 1010;
}
.slideshow-nav-btn i,
.slideshow-nav-btn svg,
#slideshowClose i,
#slideshowClose svg {
  width: 42px;
  height: 42px;
  stroke: currentColor;
}

/* =========================================== */
/*           MODAL REFACTORING                 */
/* =========================================== */
/* Generic container for all modal overlays */
.modal-overlay-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  background-color: rgba(0, 0, 0, 0.5);
}

/* Generic content box for all modals */
.modal-content-box {
  background-color: #fff;
  max-width: 300px;
  width: calc(100% - 40px);
  border-radius: 20px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  position: relative;
  text-align: center;
  padding-bottom: 15px;
  margin: 0 20px;
  z-index: 2001;
}

/* Specific overrides can still exist if needed */
#logoutConfirmationModal .modal-content-box,
#launchAnnouncementModal .modal-content-box,
#unlockPremiumModal .modal-content-box,
#shareCodeModal .modal-content-box,
#licenseManagementModal .modal-content-box {
  /* This selector is just an example if overrides were needed */
  /* In this case, they share the same properties as the base class */
}

.modal-image {
  width: 85%;
  height: auto;
  margin: 12px auto;
  margin-top: 50px;
  display: block;
}
.modal-text {
  font-size: 20px;
  font-weight: 500;
  color: #333;
  padding: 0;
  margin-left: 30px;
  margin-right: 30px;
  margin-top: -5px;
  margin-bottom: 30px;
  line-height: 1.7;
}
.modal-button {
  background-color: var(--menu-blue);
  color: #fff;
  border: none;
  padding: 8px 25px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 25px;
  cursor: pointer;
  transition: background-color 0.3s;
  margin-bottom: 25px;
}
.modal-button:hover {
  background-color: #3045a3;
}
.welcome-text-container {
  margin-bottom: 30px;
  line-height: 1.5;
}
.welcome-title {
  font-size: 25px;
  font-weight: 700;
  color: #496edb;
  margin-bottom: 5px;
}
.welcome-subtitle {
  font-size: 18px;
  font-weight: 400;
  color: #333;
  margin-bottom: 2px;
}
.welcome-copyright {
  font-size: 12px;
  font-weight: 400;
  color: #333;
}
#welcomeModal {
  cursor: pointer;
}
#startButton {
  background-image: linear-gradient(
    120deg,
    #4054b2,
    #6a80e0,
    #c040a0,
    #6a80e0,
    #4054b2
  );
  background-size: 300% 100%;
  color: #fff !important;
  transition: none;
}
#startButton:hover {
  background-image: linear-gradient(
    120deg,
    #4054b2,
    #6a80e0,
    #c040a0,
    #6a80e0,
    #4054b2
  );
  background-size: 300% 100%;
  filter: brightness(115%);
  transition: filter 0.3s ease;
}



/* =========================================== */
/*           LOGOUT MODAL STYLES               */
/* =========================================== */
@keyframes pulse {
  0%, 100% { 
    transform: scale(1); 
  }
  50% { 
    transform: scale(1.05); 
  }
}

.logout-modal-pulse {
  animation: pulse 2s infinite;
}

/* Logout modal specific hover effects */
#logoutConfirmationModal button:hover {
  transform: translateY(-1px);
}

#logoutConfirmationModal .modal-content button[onclick="confirmLogout()"]:hover {
  box-shadow: 0 6px 16px rgba(220, 38, 38, 0.4);
  transform: translateY(-2px);
}

/* Custom Game Mode Dropdown Styles */
.custom-game-mode-dropdown {
    position: relative;
    min-width: 180px;
}

.custom-game-mode-dropdown .dropdown-selected {
    border: 1px solid #ccc;
    border-radius: 6px;
    padding: 0 10px;
    font-size: 15px;
    background-color: white;
    color: #333;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    -webkit-user-select: none;
    user-select: none;
    height: 40px;
}

.custom-game-mode-dropdown .selected-text {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex: 1;
}

.custom-game-mode-dropdown .dropdown-arrow {
    transition: transform 0.2s;
}

.custom-game-mode-dropdown .dropdown-options {
    position: absolute;
    top: calc(100% + 2px);
    left: 0;
    right: 0;
    background-color: white;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    margin-top: 0px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 1050;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    display: none;
}

.custom-game-mode-dropdown .dropdown-option {
    padding: 10px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-size: 15px;
    color: #333;
}

.custom-game-mode-dropdown .dropdown-selected:hover {
    border-color: #a5b4fc;
}

.custom-game-mode-dropdown .dropdown-option:hover {
    background-color: #f9fafb;
}

.game-mode-bullet {
    width: 10px;
    height: 10px;
    border-radius: 3px;
    display: inline-block;
    margin-right: 8px;
    flex-shrink: 0;
}

/* Game mode progress bar - dark bg matches overview pill style */
.game-mode-progress-bar {
    position: relative;
    width: 60px;
    height: 28px;
    background-color: #06143B;
    border-radius: 14px;
    margin-left: 8px;
    overflow: hidden;
    flex-shrink: 0;
}

.game-mode-progress-bar .progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    border-radius: 14px;
    transition: width 0.3s ease;
}

.game-mode-progress-bar .progress-text {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: normal;
    font-family: sans-serif;
    letter-spacing: 0.5px;
    color: white;
    z-index: 1;
}

/* When progress is high (>50%), text should be white for contrast */
.game-mode-progress-bar.high-progress .progress-text {
    color: white;
}

#custom-games-mode-dropdown-mobile .dropdown-selected {
    padding: 0 12px;
    font-size: 14px;
    height: 40px;
    border: 1px solid #d1d5db;
    background-color: white;
}

#custom-games-mode-dropdown-mobile .dropdown-options {
    position: absolute;
    top: calc(100% + 2px);
    left: 0;
    right: 0;
    background-color: white;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 2100; /* Higher z-index for mobile */
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    display: none;
}

#custom-games-mode-dropdown-mobile .dropdown-option {
    padding: 10px 12px;
    font-size: 14px;
}

/* Wider form elements in mobile games/play slide-out panel to accommodate progress bars */
#games-content .form-group {
    padding-left: 10px;
    padding-right: 10px;
}

#games-content .form-select,
#games-content .btn,
#games-content .custom-game-mode-dropdown {
    width: 100%;
    box-sizing: border-box;
}

/* =========================================== */
/*           RESPONSIVE STYLES START           */
/* =========================================== */
@media (max-width: 768px) {
  body {
    /* This padding is now handled by the .times-tables-app-container */
  }
  .card-front .card-content {
    /* Using vmin units now, so this is no longer needed */
  }

  .card {
    /* The fixed height is now removed, the grid controls the height */
  }

  .menu-bar {
    height: var(--mobile-menu-bar-height);
    padding: 0 10px;
  }
  .menu-bar .app-logo {
    height: 35px;
  }
  .app-logo.emoji-active {
    transform: scale(1.5) translateY(1px) translateX(7px);
    z-index: 10;
  }
  .menu-bar .tab-buttons.desktop-tabs {
    display: none;
  }
  .menu-bar #scoreDisplay {
    display: none;
  }
  .menu-bar #settingsToggleBtn {
    display: none;
  }
  .mobile-mode-label {
    display: inline-block;
    margin-left: -6px;
    font-size: 18px;
    font-weight: 600;
    color: white;
    opacity: 0.9;
  }
  #settingsDropdown {
    display: none !important;
  }
  .menu-bar #mobileMenuToggle {
    display: flex;
  }
  .menu-panel-container {
    max-height: 0 !important;
    padding: 0 !important;
    overflow: hidden !important;
    border: none !important;
    margin: 0 !important;
    display: none !important;
  }
  .menu-panel {
    display: none !important;
  }
  .grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .grid.landscape {
    grid-template-columns: repeat(4, 1fr);
  }
  .message {
    top: calc(var(--mobile-menu-bar-height) + 80px);
  }
  #slideshowContainer {
    margin-top: var(--mobile-menu-bar-height);
  }
  .slideshow-content {
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 10px;
    max-width: 95%;
    width: 100%;
  }
  .slideshow-inner-container {
    justify-content: flex-start;
    padding-top: 20px;
    padding-bottom: 20px;
  }
  .slideshow-card {
    min-width: 90%;
    max-width: 450px;
    min-height: 240px;
  }
  #slideshowQuestionCard .card-content {
    font-size: 30px;
  }
  #slideshowAnswerCard .card-content {
    font-size: 110px;
  }
  .slideshow-card .visual {
    font-size: 20px;
  }
  .slideshow-nav-btn {
    width: 50px;
    height: 50px;
  }
  .slideshow-nav-btn i,
  .slideshow-nav-btn svg {
    width: 36px;
    height: 36px;
  }
  #slideshowPrev {
    left: 5px;
    right: auto;
  }
  #slideshowNext {
    right: 5px;
    left: auto;
  }
  #slideshowClose {
    top: 10px;
    right: 10px;
  }
  .game-instruction-modal {
    align-items: center;
  }
  .modal-content {
    width: 85%;
    max-width: 450px;
    margin-top: 0;
  }
  .modal-text {
    font-size: 16px;
  }
  .modal-button {
    padding: 8px 20px;
    font-size: 14px;
  }
  /* Mobile speed slider styles removed */
  .color-slider-track {
    height: 26px;
    border-radius: 13px;
  }
  .color-slider-handle {
    height: 34px;
    width: 12px;
    border-width: 3px;
    border-radius: 7px;
  }

  /* Ensure mobile subscription link inside form-group styling is consistent */
  #mobileSubscriptionLink {
    background-color: #f9fafb !important; /* Match previous button background */
    border: 1px solid #d1d5db !important; /* Match previous button border */
    border-radius: 6px !important; /* Match previous button radius */
    padding: 10px 12px !important; /* Match previous button padding */
    /* Other styles like gap, align-items are already inline */
  }
  #mobileSubscriptionLink:hover {
    background-color: #f3f4f6 !important; /* Lighter hover like other buttons */
  }
}
@media (max-width: 480px) {
  body {
    /* This padding is now handled by the .times-tables-app-container */
  }
  .grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .grid.landscape {
    grid-template-columns: repeat(4, 1fr);
  }
  .menu-bar {
    padding: 0 8px;
  }
  #slideshowAnswerCard .card-content {
    font-size: 90px;
  }
  .modal-content {
    width: 70%;
  }
  .modal-text {
    font-size: 14px;
    margin-left: 15px;
    margin-right: 15px;
  }
  .modal-image {
    width: 75%;
    margin-top: 40px;
  }
  .modal-button {
    padding: 7px 18px;
    font-size: 13px;
  }
  .message {
    font-size: 15px;
    padding: 10px 15px;
    padding-right: 35px;
  }
  .message-close {
    width: 14px;
    height: 14px;
    font-size: 12px;
  }
  .menu-panel-container {
    max-height: 0 !important;
    display: none !important;
  }
  .menu-panel {
    display: none !important;
  }
}

/* === New Mobile Slide Menu Setting Button Styles === */
/* These are for the Layout and Sound buttons in the slide-out menu */
.slide-menu .slide-menu-setting-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  border-radius: 6px;
  border: 1px solid #d1d5db;
  background-color: #f9fafb;
  font-size: 14px;
  color: #374151;
  cursor: pointer;
  text-align: left;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}
.slide-menu .slide-menu-setting-btn:hover {
  background-color: #f3f4f6;
}
.slide-menu .slide-menu-setting-btn i {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  flex-shrink: 0;
}
.slide-menu
  .slide-menu-setting-btn.layout-is-landscape
  #slide-practice-layout-icon,
.slide-menu
  .slide-menu-setting-btn.layout-is-landscape
  #slide-games-layout-icon {
  transform: rotate(90deg);
}
.slide-menu #slide-practice-layout-icon,
.slide-menu #slide-games-layout-icon {
  transition: transform 0.3s ease;
}
.slide-menu #slide-practice-sound-off-icon,
.slide-menu #slide-games-sound-off-icon {
  display: none !important;
}
.slide-menu #slide-practice-sound-on-icon,
.slide-menu #slide-games-sound-on-icon {
  display: inline-block !important;
}
.slide-menu .slide-menu-setting-btn.sound-is-off #slide-practice-sound-on-icon,
.slide-menu .slide-menu-setting-btn.sound-is-off #slide-games-sound-on-icon {
  display: none !important;
}
.slide-menu .slide-menu-setting-btn.sound-is-off #slide-practice-sound-off-icon,
.slide-menu .slide-menu-setting-btn.sound-is-off #slide-games-sound-off-icon {
  display: inline-block !important;
}
/* === End New Styles === */


/* Custom Voice Dropdown Styles */
.voice-flag-icon {
  width: 18px;
  height: auto;
  margin-right: 8px;
  vertical-align: -2px; /* Slightly adjust alignment for SVGs */
  border-radius: 2px;
}

.custom-voice-dropdown .dropdown-selected:hover {
  border-color: #a5b4fc; /* Light blue border on hover */
}
.custom-voice-dropdown .dropdown-option:last-child {
  border-bottom: none;
}

/* --- Grid Tab Layout Styles --- */
.tab-grid-container {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
  padding: 0.75rem;
  background-color: #f9fafb;
  border-bottom: 1px solid #e5e7eb;
}

/* 5-tab layout: 3 tabs on top, 2 on bottom */
.tab-grid-container.tab-grid-5 {
  grid-template-columns: repeat(3, 1fr);
}

.tab-grid-container.tab-grid-5 .tab-grid-button:nth-child(5),
.tab-grid-container.tab-grid-5 .tab-grid-button:nth-child(6) {
  /* Last row buttons span more space for visual balance */
}

/* Make 4th button (Rewards) span center position */
.tab-grid-container.tab-grid-5 .tab-grid-button:nth-child(5) {
  grid-column: 1 / 2;
}

.tab-grid-container.tab-grid-5 .tab-grid-button:nth-child(6) {
  grid-column: 3 / 4;
}

.tab-grid-button {
  position: relative;
  z-index: 10;
  padding: 0.75rem 0.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  transition: color 0.2s ease;
  background: none;
  border: none;
  outline: none;
  color: #64748b;
  font-size: 14px;
}

.tab-grid-button i,
.tab-grid-button svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}

.tab-grid-button span {
  font-size: 12px;
}

.tab-grid-button.active {
  color: #3b82f6;
  font-weight: 500;
}

.tab-grid-indicator {
  position: absolute;
  background-color: #d6e7fd;
  border-radius: 0.5rem;
  transition: all 0.3s ease;
  pointer-events: none;
  z-index: 0;
}

/* Diagonal stripe animation for game wins */
.win-shine-effect {
  position: relative;
  overflow: hidden;
}

.win-shine-effect::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    45deg,
    transparent 40%,
    rgba(255, 255, 255, 0.9) 48%,
    rgba(255, 255, 255, 0.9) 52%,
    transparent 60%
  );
  transform: translateY(-100%);
  animation: diagonal-stripe 1.5s ease-in-out;
  z-index: 1000;
  pointer-events: none;
}

@keyframes diagonal-stripe {
  0% {
    transform: translateY(-100%);
  }
  100% {
    transform: translateY(100%);
  }
}

/* Global modal spacing for all screen sizes */
@media (max-width: 768px) {
  .modal-content {
    width: calc(100% - 60px);
    margin: 0 30px;
  }
}

@media (max-width: 480px) {
  .modal-content {
    width: calc(100% - 80px);
    margin: 0 40px;
  }
}

/* Ensure no scaling happens */
.card-content span {
  transform: scale(1) !important;
  transition: color 0.2s ease;
}

/* Color for × symbol in equations - more specific */
.card-question .card-content span .times-symbol {
  color: rgb(255, 255, 255) !important;
  font-weight: 200 !important;
  font-size: 0.7em !important;
  display: inline !important;
  margin: 0 -0.3em !important;
  padding: 0 !important;
}

/* Color for = symbol in equations - same as × symbol */
.card-question .card-content span .equals-symbol {
  color: rgb(255, 255, 255) !important;
  font-weight: 200 !important;
  font-size: 0.7em !important;
  display: inline !important;
  margin: 0 -0.3em !important;
  padding: 0 !important;
}

/* Make times symbol grey on matched cards */
.card.matched .card-content span .times-symbol {
  color: var(--matched-text) !important;
}

/* Make equals symbol grey on matched cards */
.card.matched .card-content span .equals-symbol {
  color: var(--matched-text) !important;
}

/* Matched cards get the same shadow as other cards */
.card.matched .card-front,
.card.matched .card-back {
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.34) !important;
}


/* =========================================== */
/*              ORGANIZED CARD COLORS          */
/* =========================================== */
/* Safari paint bug workaround: card gradients use inline hex colors
   instead of var(--...) because Safari fails to repaint chained CSS
   custom properties in linear-gradient() after a fixed-position overlay
   (the language launch modal) is inserted/removed during card setup.
   Reproduced on /cn/, /jp/ etc. where cards rendered transparent until
   a window resize or orientation toggle forced a layout recalc.
   If you need to change the palette, update both here and the :root
   semantic vars at the top of this file. */

/* Face-down cards (the "?" cards) — facedown-card (orange) */
.card-front {
  border: 3px solid white;
  background: linear-gradient(135deg, #FFCD82 0%, #FFF3D6 100%);
}

/* ========================================= */
/*           PRACTICE MODE COLORS            */
/* ========================================= */
/* Equation cards in Practice mode — practice-equation (blue) */
body[data-active-tab="practice"] .card.flipped .card-back.card-question {
  background: linear-gradient(135deg, #1564dc 0%, #70a7ef 100%) !important;
  color: white !important;
}

/* Result cards in Practice mode — practice-result (green) */
body[data-active-tab="practice"] .card.flipped .card-back.card-answer {
  background: linear-gradient(135deg, #16a34a 0%, #86efac 100%) !important;
  color: white !important;
}

/* ========================================= */
/*          MATCH EQUATIONS MODE COLORS     */
/* ========================================= */
/* Question cards (visible) in Match Equations mode — match-eq-visible (blue) */
body[data-mode="findResults"] .card.flipped .card-back.card-question {
  background: linear-gradient(135deg, #1564dc 0%, #70a7ef 100%) !important;
  color: white !important;
}

/* Answer cards (hidden initially) in Match Equations mode — match-eq-hidden (orange) */
body[data-mode="findResults"] .card.flipped .card-back.card-answer {
  background: linear-gradient(135deg, #FFCD82 0%, #FFF3D6 100%) !important;
  color: #1e1b19 !important;
}

/* ========================================= */
/*          MATCH RESULTS MODE COLORS       */
/* ========================================= */
/* Answer cards (visible) in Match Results mode — match-res-visible (purple) */
body[data-mode="findEquations"] .card.flipped .card-back.card-answer {
  background: linear-gradient(135deg, #7c3aed 0%, #c4b5fd 100%) !important;
  color: white !important;
}

/* Question cards (hidden initially) in Match Results mode — match-res-hidden (orange) */
body[data-mode="findEquations"] .card.flipped .card-back.card-question {
  background: linear-gradient(135deg, #FFCD82 0%, #FFF3D6 100%) !important;
  color: #1e1b19 !important;
}

/* ========================================= */
/*          FIND FACTORS MODE COLORS        */
/* ========================================= */
/* Question cards (visible) in Find Factors mode — find-factors-visible (teal/pink) */
body[data-mode="findFactors"] .card.flipped .card-back.card-question {
  background: linear-gradient(135deg, #bd354e 0%, #fc95b4 100%) !important;
  color: white !important;
}

/* Factor cards (hidden initially) in Find Factors mode — find-factors-hidden (orange) */
body[data-mode="findFactors"] .card.flipped .card-back.card-answer {
  background: linear-gradient(135deg, #FFCD82 0%, #FFF3D6 100%) !important;
  color: #1e1b19 !important;
}

/* ========================================= */
/*       WAITING-FOR-MATCH CARD COLORS      */
/* ========================================= */
/* Pulsing card colors when waiting for match in game modes */
body[data-mode="findResults"] .card.waiting-for-match.flipped .card-back.card-answer,
body[data-mode="findEquations"] .card.waiting-for-match.flipped .card-back.card-question,
body[data-mode="findFactors"] .card.waiting-for-match.flipped .card-back.card-answer {
  background: linear-gradient(135deg, #FFCD82 0%, #FFF3D6 100%) !important;
  border: 3px solid white !important;
}

/* Black text for waiting-for-match cards */
body[data-mode="findResults"] .card.waiting-for-match.flipped .card-back.card-answer .card-content,
body[data-mode="findResults"] .card.waiting-for-match.flipped .card-back.card-answer .card-content span,
body[data-mode="findEquations"] .card.waiting-for-match.flipped .card-back.card-question .card-content,
body[data-mode="findEquations"] .card.waiting-for-match.flipped .card-back.card-question .card-content span,
body[data-mode="findFactors"] .card.waiting-for-match.flipped .card-back.card-answer .card-content,
body[data-mode="findFactors"] .card.waiting-for-match.flipped .card-back.card-answer .card-content span {
  color: black !important;
}

/* Override pulse-active text color for waiting-for-match cards */
body[data-mode="findResults"] .card.waiting-for-match .card-back.card-answer .card-content span.js-pulse-active,
body[data-mode="findEquations"] .card.waiting-for-match .card-back.card-question .card-content span.js-pulse-active,
body[data-mode="findFactors"] .card.waiting-for-match .card-back.card-answer .card-content span.js-pulse-active {
  color: black !important;
}

/* ========================================= */
/*             MATCHED CARD COLORS          */
/* ========================================= */
/* Matched cards (same appearance in all modes) - High specificity to override mode colors */
.card.matched.flipped .card-back.card-question,
.card.matched.flipped .card-back.card-answer,
body[data-active-tab="practice"] .card.matched.flipped .card-back.card-question,
body[data-active-tab="practice"] .card.matched.flipped .card-back.card-answer,
body[data-mode="findResults"] .card.matched.flipped .card-back.card-question,
body[data-mode="findResults"] .card.matched.flipped .card-back.card-answer,
body[data-mode="findEquations"] .card.matched.flipped .card-back.card-question,
body[data-mode="findEquations"] .card.matched.flipped .card-back.card-answer,
body[data-mode="findFactors"] .card.matched.flipped .card-back.card-question,
body[data-mode="findFactors"] .card.matched.flipped .card-back.card-answer {
  background: var(--matched-card-bg) !important;
  animation: none !important;
}

.card.matched .card-content {
  color: var(--matched-card-text) !important;
  opacity: 0.9 !important;
  filter: grayscale(0%) !important;
}

.card.matched .card-front,
.card.matched .card-back {
  border: 3px solid white !important;
}

/* Remove waiting-for-match effects from matched cards */
.card.matched .card-inner {
  box-shadow: none !important;
  animation: none !important;
}

/* Disable hover effects on matched cards */
.card.matched:hover .card-content span {
  color: var(--matched-card-text) !important;
  transform: none !important;
  transition: none !important;
}

.card.matched:hover .card-back {
  transform: none !important;
}

.card.matched:hover .card-front {
  transform: none !important;
  background-color: var(--matched-card-bg) !important;
}

/* Make matched cards slightly faded */
.card.matched {
  opacity: 0.95 !important;
  filter: grayscale(0%) !important;
  transition: opacity 0.3s ease, filter 0.3s ease;
}

/* General text colors for all cards */
.card-question .card-content,
.card-answer .card-content {
  color: white !important;
}

/* Override: Dark text for all orange cards (face-down "?" and flipped content) */
body[data-mode="findResults"] .card:not(.matched).flipped .card-back.card-answer .card-content,
body[data-mode="findResults"] .card:not(.matched).flipped .card-back.card-answer .card-content span,
body[data-mode="findEquations"] .card:not(.matched).flipped .card-back.card-question .card-content,
body[data-mode="findEquations"] .card:not(.matched).flipped .card-back.card-question .card-content span,
body[data-mode="findFactors"] .card:not(.matched).flipped .card-back.card-answer .card-content,
body[data-mode="findFactors"] .card:not(.matched).flipped .card-back.card-answer .card-content span {
  color: #1e1b19 !important;
}

/* Welcome Modal Slides */
.welcome-slides-container {
  position: relative;
  width: 100%;
  overflow: hidden;
  min-height: 350px;
  max-height: 70vh; /* Prevent slides from being too tall */
  overflow-y: auto; /* Allow scrolling if content is too tall */
}

.welcome-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  opacity: 0;
  transform: translateX(100%);
  transition: all 0.4s ease-in-out;
  visibility: hidden;
  max-height: 100%;
  overflow-y: auto;
  box-sizing: border-box;
}

.welcome-slide.active {
  opacity: 1;
  transform: translateX(0);
  position: relative;
  visibility: visible;
}

.welcome-slide.prev {
  transform: translateX(-100%);
}

/* Welcome Choice Buttons - Enhanced Design */
.welcome-choice-btn {
  border: none !important;
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%) !important;
  margin-left: 0 !important;
  margin-right: 0 !important;
  width: 100% !important;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04) !important;
  border-radius: 16px !important;
  padding: 20px 18px !important;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
  position: relative !important;
  overflow: hidden !important;
  cursor: pointer !important;
  display: flex !important;
  align-items: center !important;
  gap: 14px !important;
  width: 100% !important;
  text-align: left !important;
  margin-bottom: 12px !important;
}

.welcome-choice-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(16, 185, 129, 0.05) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 1;
}

.welcome-choice-btn:hover::before {
  opacity: 1;
}

.welcome-choice-btn:hover {
  transform: translateY(-3px) scale(1.02) !important;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12), 0 4px 8px rgba(0, 0, 0, 0.08) !important;
  border: none !important;
  background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%) !important;
}

.welcome-choice-btn:active {
  transform: translateY(-1px) scale(1.01) !important;
  transition: all 0.1s ease !important;
}

/* Enhanced icon containers */
.welcome-choice-btn .icon-container {
  width: 48px !important;
  height: 48px !important;
  border-radius: 12px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  flex-shrink: 0 !important;
  position: relative !important;
  z-index: 2 !important;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15) !important;
  transition: all 0.3s ease !important;
}

.welcome-choice-btn:hover .icon-container {
  transform: scale(1.1) !important;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2) !important;
}

/* Try It Out button - Green theme */
#welcomeTryBtn .icon-container {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%) !important;
}

#welcomeTryBtn:hover {
  background: linear-gradient(135deg, #ffffff 0%, #ecfdf5 100%) !important;
}

/* Sign In button - Blue theme */
#welcomeSignInBtn .icon-container {
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%) !important;
}

#welcomeSignInBtn:hover {
  background: linear-gradient(135deg, #ffffff 0%, #eff6ff 100%) !important;
}

/* Enhanced text styling */
.welcome-choice-btn .text-content {
  flex: 1 !important;
  position: relative !important;
  z-index: 2 !important;
}

.welcome-choice-btn .main-text {
  font-weight: 700 !important;
  color: #1f2937 !important;
  margin-bottom: 4px !important;
  font-size: 16px !important;
  line-height: 1.2 !important;
}

.welcome-choice-btn .sub-text {
  font-size: 13px !important;
  color: #6b7280 !important;
  line-height: 1.3 !important;
  font-weight: 500 !important;
}

.welcome-choice-btn:hover .main-text {
  color: #111827 !important;
}

.welcome-choice-btn:hover .sub-text {
  color: #4b5563 !important;
}

/* Icon styling */
.welcome-choice-btn i {
  width: 24px !important;
  height: 24px !important;
  color: white !important;
  stroke-width: 2.5 !important;
}

/* Welcome Back Button */
.welcome-back-btn {
  background: none;
  border: 2px solid #e5e7eb;
  color: #6b7280;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
}

.welcome-back-btn:hover {
  border-color: #d1d5db;
  background: #f9fafb;
}

.welcome-continue-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(16, 185, 129, 0.4);
}

.welcome-continue-btn:disabled {
  background: #e5e7eb;
  color: #9ca3af;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Focus styles for the input */
#welcomeUnlockCodeInput:focus {
  outline: none;
  border-color: #3b82f6 !important;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Mobile responsive adjustments */
@media (max-height: 750px) and (min-width: 481px) {
  .welcome-slides-container {
    min-height: 350px;
  }
}

@media (max-height: 650px) and (min-width: 481px) {
  .welcome-slides-container {
    min-height: 320px;
  }
  
  .welcome-continue-btn {
    padding: 12px 24px;
    font-size: 15px;
  }
}

@media (max-height: 550px) {
  .welcome-slides-container {
    min-height: 280px;
  }
  
  .welcome-slide {
    padding: 10px 0;
  }
  
  .welcome-continue-btn {
    padding: 10px 20px;
    font-size: 14px;
    margin: 15px auto 5px;
  }
}

/* =========================================== */
/*         IMPROVED WELCOME MODAL STYLES      */
/* =========================================== */



#welcomeModal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 20px;
  box-sizing: border-box;
}

/* Styling for the logo on the first welcome slide */
.welcome-slide-logo {
  display: block;
  width: 290px;
  max-width: 40%;
  margin: 20px auto 4px auto; /* Added top/bottom margin for buffer */
}

#welcomeModal .modal-content-box {
  background: white; /* Give it a solid background now */
  border-radius: 24px;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
  overflow: hidden;
  width: 100%;
  max-width: 500px; /* <-- This is now the standard width for all slides */
  max-height: 95vh;
  position: relative;
  display: flex;
  flex-direction: column; /* Ensure it's a column layout */
  margin: 0 auto;
}

/* Close Button */
#welcomeModal .modal-close {
  display: none;
}

#welcomeModal .modal-close:hover {
  background: rgba(0, 0, 0, 0.15);
  color: #374151;
}

/* Right Section is now the ONLY section */
.welcome-right-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  min-width: auto; /* Remove old min-width */
}

.welcome-right-section.full-width {
  border-radius: 24px !important;
  min-width: 400px;
  max-width: 600px;
  position: relative !important;
  width: 100% !important;
  margin-left: 0 !important;
  left: 0 !important;
  right: 0 !important;
}

/* Slides Container */
.welcome-slides-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  max-height: 70vh;
}

.welcome-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding: 30px 20px 20px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transform: translateX(100%);
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  visibility: hidden;
  overflow-y: auto;
  box-sizing: border-box;
}

.welcome-slide.active {
  opacity: 1;
  transform: translateX(0);
  visibility: visible;
  position: relative;
}

.welcome-slide.prev {
  transform: translateX(-100%);
}

/* Slide Headers */
.slide-header,
#welcomeModal h2 {
  text-align: center;
  margin-bottom: 15px;
}

.slide-title,
#welcomeModal h2 {
  font-size: 28px;
  font-weight: 800;
  color: #1f2937;
  margin-bottom: 8px;
  line-height: 1.2;
}

.slide-subtitle,
#welcomeModal p {
  font-size: 16px;
  color: #6b7280;
  font-weight: 500;
  line-height: 1.4;
}

/* Choice Buttons */
.welcome-option-btn,
.welcome-choice-btn {
  background: white !important;
  border: 2px solid #e5e7eb !important;
  border-radius: 16px !important;
  padding: 18px 20px !important;
  cursor: pointer !important;
  transition: all 0.3s ease !important;
  display: flex !important;
  align-items: center !important;
  gap: 14px !important;
  text-align: left !important;
  position: relative !important;
  overflow: hidden !important;
  width: 100% !important;
  max-width: 400px !important;
  margin: 0 auto 12px auto !important;
}

.welcome-option-btn::before,
.welcome-choice-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.02) 0%, rgba(16, 185, 129, 0.02) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.welcome-option-btn:hover,
.welcome-choice-btn:hover {
  border-color: #3b82f6 !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1) !important;
  background: white !important;
}

.welcome-option-btn:hover::before,
.welcome-choice-btn:hover::before {
  opacity: 1;
}

.welcome-option-btn .icon-container,
.choice-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  position: relative;
  z-index: 2;
}

#welcomeTryBtn .icon-container,
.choice-icon.green {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%) !important;
}

#welcomeSignInBtn .icon-container,
.choice-icon.blue {
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%) !important;
}

.welcome-option-btn .icon-container i,
.choice-icon i {
  width: 24px;
  height: 24px;
  color: white;
  stroke-width: 2.5;
}

.welcome-option-btn .text-content,
.choice-content {
  flex: 1;
  z-index: 1;
}

.welcome-option-btn .main-text,
.choice-title {
  font-size: 18px;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 4px;
}

.welcome-option-btn .sub-text,
.choice-description {
  font-size: 14px;
  color: #6b7280;
  font-weight: 500;
  line-height: 1.3;
}

/* Back Button */
.welcome-back-btn,
.back-btn {
  background: none;
  border: 2px solid #e5e7eb;
  color: #6b7280;
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: 5px;
  margin-bottom: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  align-self: center;
  font-weight: 500;
  order: 10;
}

.welcome-back-btn:hover,
.back-btn:hover {
  border-color: #d1d5db;
  background: #f9fafb;
}

.welcome-back-btn i,
.back-btn i {
  width: 14px;
  height: 14px;
}

.welcome-content {
  text-align: center;
  margin-bottom: 32px;
  padding-left: 20px;
  padding-right: 20px;
}

.welcome-info-box {
  background: linear-gradient(135deg, #dcfce7 0%, #bbf7d0 100%);
  border: 2px solid #16a34a;
  border-radius: 12px;
  padding: 20px;
  margin: 20px 0;
  color: #166534;
  text-align: center;
}

.welcome-info-box .info-title {
  font-weight: 600;
  margin-bottom: 10px;
  font-size: 16px;
}

.welcome-info-box .info-content {
  font-size: 14px;
  line-height: 1.7;
}

/* Form Elements */
.form-group {
  margin-bottom: 20px;
}

#welcomeUnlockCodeInput,
.form-input {
  width: 100%; /* Change from calc(100% - 40px) */
  padding: 16px 32px;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  font-size: 18px;
  font-weight: 600;
  text-align: center;
  letter-spacing: 1px;
  font-family: monospace;
  transition: all 0.2s ease;
  margin: 0 0 12px 0; /* Remove left/right margins */
  box-sizing: border-box;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#welcomeUnlockCodeInput:focus,
.form-input:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-hint {
  font-size: 15px;
  color: #6b7280;
  text-align: center;
  margin-top: 8px;
  font-weight: 500;
}

#welcomeSignInError,
.error-message {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #dc2626;
  padding: 12px;
  border-radius: 8px;
  font-size: 14px;
  margin: 15px 0;
  display: none;
}

#welcomeSlide2Trial .slide-header {
  margin-bottom: 8px; /* Even less space under title */
}

#welcomeSlide2Trial .welcome-info-box {
  margin-bottom: 40px; /* Add margin beneath green feature box */
}

/* Primary Button */
.welcome-continue-btn,
.primary-btn {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
  border: 2px solid transparent;
  padding: 16px 32px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  margin: 8px 0 0 0;
  box-sizing: border-box;
}

.welcome-continue-btn:hover,
.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(16, 185, 129, 0.4);
}

.welcome-continue-btn:disabled,
.primary-btn:disabled {
  background: #e5e7eb;
  color: #9ca3af;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.welcome-continue-btn i,
.primary-btn i {
  width: 18px;
  height: 18px;
}

/* Welcome Back Slide */
.welcome-back-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px;
  width: 100%;
  max-width: 340px;
  margin: 0 auto;
}

.welcome-back-content .welcome-slide-logo {
  width: auto;
  max-width: 200px;
  max-height: 160px;
  height: auto;
  object-fit: contain;
  margin-bottom: 16px;
}

.welcome-back-subtitle {
  color: #6b7280;
  font-size: 16px;
  margin-bottom: 24px;
}

.welcome-back-go-btn {
  max-width: 280px;
  font-size: 18px !important;
  padding: 18px 36px !important;
}

/* Success Elements */
.success-icon {
  width: 64px;
  height: 64px;
  background: #dcfce7;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: #16a34a;
}

.success-icon i {
  width: 32px;
  height: 32px;
}

#welcomePersonalizedContent {
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
  border: 2px solid #3b82f6;
  border-radius: 12px;
  padding: 20px;
  margin: 20px 0 35px 0;
  color: #1e40af;
  font-size: 14px;
  line-height: 1.5;
  text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
  #welcomeModal {
      padding: 25px; /* Increased from 15px for more space */
  }

  #welcomeModal .modal-content-box {
    max-width: 100%; /* Allow modal to fill the padded space */
    max-height: 95vh;
    min-height: auto;
    height: auto;
    margin: 0;
    overflow-y: auto;
  }

  /* The old mobile rules for .welcome-left-section and .welcome-right-section are no longer needed */
  .welcome-right-section {
    min-width: auto;
    flex: 1;
    border-radius: 0 0 24px 24px;
  }
}

@media (max-width: 768px) {
  #welcomeModal .modal-image,
  .welcome-brand-logo {
    width: 120px;
    height: 120px;
    margin-bottom: 16px;
  }
  
  .welcome-title,
  .welcome-brand-content h1 {
    font-size: 24px;
  }
  
  .welcome-subtitle,
  .welcome-brand-tagline {
    font-size: 14px;
  }
  
  .welcome-right-section {
    min-width: auto;
    flex: 1;
    border-radius: 0 0 24px 24px;
  }
  
  .welcome-slide {
    padding: 24px 20px 30px; /* Replaced 6vh with fixed value */
    justify-content: center;
}
  
  .slide-title,
  #welcomeModal h2 {
    font-size: 22px;
  }
  
  .welcome-option-btn,
  .welcome-choice-btn {
    padding: 16px 20px !important;
    gap: 12px !important;
  }
  
  .welcome-option-btn .icon-container,
  .choice-icon {
    width: 40px;
    height: 40px;
  }
  
  .welcome-option-btn .icon-container i,
  .choice-icon i {
    width: 20px;
    height: 20px;
  }
  
  .welcome-option-btn .main-text,
  .choice-title {
    font-size: 16px;
  }
  
  .welcome-option-btn .sub-text,
  .choice-description {
    font-size: 13px;
  }

  .welcome-copyright,
  .welcome-brand-copyright {
      margin-bottom: 10px !important;
  }
  .welcome-copyright,
  .welcome-brand-copyright {
    margin-bottom: -15px !important;
  }
}

@media (max-width: 480px) {
  #welcomeModal {
      padding: 20px; /* Increased from 10px for more space */
      align-items: center;
      justify-content: center;
  }

  #welcomeModal .modal-content-box {
    max-width: 98vw;
    max-height: 80vh;
    border-radius: 20px;
    min-height: auto;
    width: calc(100vw - 20px);
    margin: 0;
    overflow-y: auto;
  }

.welcome-slides-container {
  min-height: 250px;
  max-height: 60vh;
  align-items: center;
  justify-content: center;
}

  .welcome-slide {
    padding: 15px 16px 20px; /* Replaced 5vh with fixed value */
      justify-content: center;
  }

  .slide-title,
  #welcomeModal h2 {
      font-size: 20px;
      margin-bottom: 15px;
  }

  .slide-subtitle,
  #welcomeModal p {
      font-size: 14px;
      margin-bottom: 20px;
  }

  .welcome-option-btn,
  .welcome-choice-btn {
      padding: 14px 16px !important;
      gap: 10px !important;
      margin-bottom: 10px !important;
  }

  .slide-header {
      margin-bottom: 20px;
  }
}

/* Extra small screens and short screens */
@media (max-width: 360px), (max-height: 600px) {
  #welcomeModal {
      padding: 16px; /* Increased from 8px for more space */
  }

  #welcomeModal .modal-content {
      max-height: 98vh;
      border-radius: 16px;
  }

  .welcome-left-section {
      padding: 15px 16px 10px;
  }

  #welcomeModal .modal-image,
  .welcome-brand-logo {
      width: 60px;
      height: 60px;
      margin-bottom: 12px;
  }

  .welcome-title,
  .welcome-brand-content h1 {
      font-size: 20px;
      margin-bottom: 6px;
  }

  .welcome-subtitle,
  .welcome-brand-tagline {
      font-size: 13px;
      margin-bottom: 4px;
  }

  .welcome-slides-container {
    min-height: 200px;
    max-height: 55vh;
    align-items: center;
    justify-content: center;
}

  .welcome-slide {
      padding: 12px 14px 8px;
  }

  .slide-title {
      font-size: 18px;
      margin-bottom: 12px;
  }

  .slide-subtitle {
      font-size: 13px;
      margin-bottom: 16px;
  }

  .welcome-option-btn,
  .welcome-choice-btn {
      padding: 12px 14px !important;
      gap: 8px !important;
      margin-bottom: 8px !important;
  }

  .welcome-option-btn .icon-container,
  .choice-icon {
      width: 36px;
      height: 36px;
  }

  .welcome-option-btn .icon-container i,
  .choice-icon i {
      width: 18px;
      height: 18px;
  }

  .welcome-option-btn .main-text,
  .choice-title {
      font-size: 15px;
  }

  .welcome-option-btn .sub-text,
  .choice-description {
      font-size: 12px;
  }
}

/* Extra small screens and short screens */
@media (max-width: 360px), (max-height: 600px) {
  #welcomeModal {
      padding: 16px; /* Increased from 8px for more space */
  }

  #welcomeModal .modal-content-box {
      max-height: 98vh;
      border-radius: 16px;
  }

  .welcome-left-section {
      padding: 15px 16px 10px;
  }

  #welcomeModal .modal-image,
  .welcome-brand-logo {
      width: 60px;
      height: 60px;
      margin-bottom: 12px;
  }

  .welcome-title,
  .welcome-brand-content h1 {
      font-size: 20px;
      margin-bottom: 6px;
  }

  .welcome-subtitle,
  .welcome-brand-tagline {
      font-size: 13px;
      margin-bottom: 4px;
  }

  .welcome-slides-container {
    min-height: 200px;
    max-height: 55vh;
    align-items: center;
    justify-content: center;
}

  .welcome-slide {
      padding: 12px 14px 8px;
  }

  .slide-title {
      font-size: 18px;
      margin-bottom: 12px;
  }

  .slide-subtitle {
      font-size: 13px;
      margin-bottom: 16px;
  }

  .welcome-option-btn,
  .welcome-choice-btn {
      padding: 12px 14px !important;
      gap: 8px !important;
      margin-bottom: 8px !important;
  }

  .welcome-option-btn .icon-container,
  .choice-icon {
      width: 36px;
      height: 36px;
  }

  .welcome-option-btn .icon-container i,
  .choice-icon i {
      width: 18px;
      height: 18px;
  }

  .welcome-option-btn .main-text,
  .choice-title {
      font-size: 15px;
  }

  .welcome-option-btn .sub-text,
  .choice-description {
      font-size: 12px;
  }
}

/* Landscape orientation - keep horizontal layout */
@media (max-height: 600px) and (min-width: 769px) {
  #welcomeModal .modal-content-box {
      max-height: 85vh;
      flex-direction: row;
  }

  .welcome-left-section {
      padding: 20px;
      border-radius: 24px 0 0 24px;
  }

  #welcomeModal .modal-image,
  .welcome-brand-logo {
      width: 80px;
      height: 80px;
      margin-bottom: 12px;
  }

  .welcome-title,
  .welcome-brand-content h1 {
      font-size: 20px;
  }

  .welcome-slide {
      padding: 20px 24px;
  }

  .slide-title,
  #welcomeModal h2 {
      font-size: 24px;
  }

  .welcome-right-section {
      border-radius: 0 24px 24px 0;
  }
}

/* Animation classes */
@keyframes slideInRight {
  from {
      opacity: 0;
      transform: translateX(100%);
  }
  to {
      opacity: 1;
      transform: translateX(0);
  }
}

@keyframes slideInLeft {
  from {
      opacity: 0;
      transform: translateX(-100%);
  }
  to {
      opacity: 1;
      transform: translateX(0);
  }
}

.slide-enter-right {
  animation: slideInRight 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide-enter-left {
  animation: slideInLeft 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reverse Factors Toggle States */

/* Default State: Show OFF icon (arrow-right-left), hide ON icon */
#reverseFactorsToggle #reverseFactorsOnIcon,
#slide-reverse-factors-toggle #slide-reverse-factors-on-icon {
  display: none !important;
}

#reverseFactorsToggle #reverseFactorsOffIcon,
#slide-reverse-factors-toggle #slide-reverse-factors-off-icon {
  display: inline !important;
  /* The "opacity: 0.3;" line has been removed from here */
}

/* Active State: When the button has the .reverse-factors-on class... */
/* Show ON icon (arrow-left-right), hide OFF icon */
#reverseFactorsToggle.reverse-factors-on #reverseFactorsOnIcon,
#slide-reverse-factors-toggle.reverse-factors-on #slide-reverse-factors-on-icon {
  display: inline !important;
  opacity: 1;
}

#reverseFactorsToggle.reverse-factors-on #reverseFactorsOffIcon,
#slide-reverse-factors-toggle.reverse-factors-on #slide-reverse-factors-off-icon {
  display: none !important;
}

/* === New Styles for Skip Operators Toggle === */

/* --- Desktop Toggle --- */
/* Default State: Skipping is OFF, so show the "speaking" icon */
#skipOperatorsToggle #skipOperatorsOnIcon { display: none !important; }
#skipOperatorsToggle #skipOperatorsOffIcon { display: inline-block !important; }

/* Active State: When .skip-operators-on class is added, show the "muted" icon */
#skipOperatorsToggle.skip-operators-on #skipOperatorsOnIcon { display: inline-block !important; }
#skipOperatorsToggle.skip-operators-on #skipOperatorsOffIcon { display: none !important; }


/* --- Mobile Toggle --- */
/* Default State: Skipping is OFF */
#slide-skip-operators-toggle #slide-skip-operators-on-icon { display: none !important; }
#slide-skip-operators-toggle #slide-skip-operators-off-icon { display: inline-block !important; }

/* Active State: Skipping is ON */
#slide-skip-operators-toggle.skip-operators-on #slide-skip-operators-on-icon { display: inline-block !important; }
#slide-skip-operators-toggle.skip-operators-on #slide-skip-operators-off-icon { display: none !important; }


/* --- Bubbles Toggle (Desktop) --- */
/* Default State: Bubbles OFF — show the "off" icon */
#bubblesToggle #bubblesOnIcon { display: none !important; }
#bubblesToggle #bubblesOffIcon { display: inline-block !important; }

/* Active State: Bubbles ON — show the "on" icon */
#bubblesToggle.bubbles-on #bubblesOnIcon { display: inline-block !important; }
#bubblesToggle.bubbles-on #bubblesOffIcon { display: none !important; }

/* --- Bubbles Toggle (Mobile) --- */
/* Default State: Bubbles OFF */
#slide-bubbles-toggle #slide-bubbles-on-icon { display: none !important; }
#slide-bubbles-toggle #slide-bubbles-off-icon { display: inline-block !important; }

/* Active State: Bubbles ON */
#slide-bubbles-toggle.bubbles-on #slide-bubbles-on-icon { display: inline-block !important; }
#slide-bubbles-toggle.bubbles-on #slide-bubbles-off-icon { display: none !important; }


/* Mobile Voice Dropdown Styling */
.custom-voice-dropdown-mobile {
  width: 100%;
  position: relative;
}

.dropdown-selected-mobile {
  border: 1px solid #d1d5db;
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 14px;
  background-color: white;
  color: #1f2937;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  min-height: 20px;
}

.selected-voice-text {
  display: flex;
  align-items: center;
  gap: 8px;
}

.voice-flag-icon {
  width: 16px;
  height: 12px;
  border-radius: 2px;
}

.dropdown-options-mobile {
  position: absolute;
  top: calc(100% + 2px);
  left: 0;
  right: 0;
  background-color: white;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  max-height: 200px;
  overflow-y: auto;
  z-index: 1000;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.dropdown-option-mobile {
  padding: 10px 12px;
  border-bottom: 1px solid #f3f4f6;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  color: #1f2937;
  background-color: white;
  font-size: 14px;
}

.dropdown-option-mobile:hover:not(.disabled) {
  background-color: #f9fafb;
}

.dropdown-option-mobile.disabled {
  color: #9ca3af;
  cursor: not-allowed;
}

.dropdown-option-mobile.selected {
  background-color: #eff6ff;
}

.dropdown-arrow {
  transition: transform 0.2s;
  color: #6b7280;
}

.dropdown-arrow.open {
  transform: rotate(180deg);
}

/* Mobile Language Dropdown Styling */
.custom-language-dropdown-mobile {
  width: 100%;
  position: relative;
}

.selected-language-text {
  display: flex;
  align-items: center;
  gap: 8px;
}

.language-flag-icon {
  width: 16px;
  height: 12px;
  border-radius: 2px;
}

/* Reuse the same dropdown styling for language */
.custom-language-dropdown-mobile .dropdown-selected-mobile,
.custom-language-dropdown-mobile .dropdown-options-mobile,
.custom-language-dropdown-mobile .dropdown-option-mobile {
  /* Inherits all the styling from voice dropdown */
}

/* Visual indicator for shared answer cards in mixed mode */
.card[data-answer-value] .card-back::after {
  content: "";
  position: absolute;
  top: 4px;
  right: 4px;
  width: 8px;
  height: 8px;
  background: linear-gradient(45deg, #10b981, #059669);
  border-radius: 50%;
  opacity: 0.7;
}

.card[data-answer-value] .card-back:hover::after {
  opacity: 1;
  transform: scale(1.2);
  transition: all 0.2s ease;
}

/* Language font weight adjustment */
html[lang="th"] .card-content,
html[lang="th"] .card-content span,
html[lang="th"] .slideshow-card .card-content,
html[lang="th"] .slideshow-card .card-content span,
html[lang="vi"] .card-content,
html[lang="vi"] .card-content span,
html[lang="vi"] .slideshow-card .card-content,
html[lang="vi"] .slideshow-card .card-content span,
html[lang="ar"] .card-content,
html[lang="ar"] .card-content span,
html[lang="ar"] .slideshow-card .card-content,
html[lang="ar"] .slideshow-card .card-content span,
html[lang="en"] .card-content,
html[lang="en"] .card-content span,
html[lang="en"] .slideshow-card .card-content,
html[lang="en"] .slideshow-card .card-content span,
html[lang="es"] .card-content,
html[lang="es"] .card-content span,
html[lang="es"] .slideshow-card .card-content,
html[lang="es"] .slideshow-card .card-content span,
html[lang="cy"] .card-content,
html[lang="cy"] .card-content span,
html[lang="cy"] .slideshow-card .card-content,
html[lang="cy"] .slideshow-card .card-content span,
html[lang="hi"] .card-content,
html[lang="hi"] .card-content span,
html[lang="hi"] .slideshow-card .card-content,
html[lang="hi"] .slideshow-card .card-content span,
html[lang="ja"] .card-content,
html[lang="ja"] .card-content span,
html[lang="ja"] .slideshow-card .card-content,
html[lang="ja"] .slideshow-card .card-content span,
html[lang="ko"] .card-content,
html[lang="ko"] .card-content span,
html[lang="ko"] .slideshow-card .card-content,
html[lang="ko"] .slideshow-card .card-content span {
  font-weight: 400 !important;
}

/* Ensure numbers are not bold in cards for specific languages */
html[lang="th"] .card-question .card-content span,
html[lang="th"] .card-answer .card-content span,
html[lang="vi"] .card-question .card-content span,
html[lang="vi"] .card-answer .card-content span,
html[lang="ar"] .card-question .card-content span,
html[lang="ar"] .card-answer .card-content span,
html[lang="en"] .card-question .card-content span,
html[lang="en"] .card-answer .card-content span,
html[lang="es"] .card-question .card-content span,
html[lang="es"] .card-answer .card-content span,
html[lang="cy"] .card-question .card-content span,
html[lang="cy"] .card-answer .card-content span,
html[lang="hi"] .card-question .card-content span,
html[lang="hi"] .card-answer .card-content span {
  font-weight: 300 !important;
}

/* Achievement emoji animations */
@keyframes achievementBounce {
  0%, 100% { 
    transform: translateY(-50%) scale(1); 
  }
  50% { 
    transform: translateY(-50%) scale(1.2); 
  }
}

.achievement-emoji {
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}


.modal-close {
  position: absolute;
  top: 15px;
  right: 15px;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-weight: 700;
  color: #333;
  font-size: 24px;
  transition: transform 0.2s, color 0.2s;
  z-index: 10;
}

/* =========================================== */
/*      MOBILE LANDSCAPE WELCOME MODAL         */
/* =========================================== */

@media (max-width: 900px) and (max-height: 500px) and (orientation: landscape) {
  #welcomeModal .modal-content-box {
    flex-direction: row;
    max-width: 95vw;
    max-height: 95vh;
    padding: 10px;
  }

  .welcome-slides-container {
    display: flex;
    flex: 1;
    min-height: 0;
  }

  .welcome-slide {
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 20px;
    height: 100%;
  }

  .welcome-left-column {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    gap: 15px;
  }

  .welcome-right-column {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    gap: 15px;
  }

  .welcome-slide-logo {
    max-width: 120px;
    height: auto;
    margin: 0;
  }

  #welcome-modal-title {
    font-size: 24px;
    font-weight: 700;
    margin: 0;
  }

  .welcome-choice-btn {
    width: 100%;
    max-width: 250px;
  }
}

/* ============================================
   PLAY SLIDER (Play/Games tab onboarding)
   ps- prefix to avoid conflicts
   ============================================ */
#playSliderOverlay {
  position: fixed;
  inset: 0;
  z-index: 1400;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.ps-card,
.ps-card * { box-sizing: border-box; }
.ps-card {
  position: relative;
  width: calc(100% - 24px);
  max-width: 320px;
  height: 480px;
  max-height: calc(100% - 24px);
  background: #ffffff;
  border-radius: 20px;
  border: 1.5px solid rgba(0,0,0,0.08);
  box-shadow: 0 20px 60px rgba(0,0,0,0.25), 0 0 40px rgba(0,0,0,0.08);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-family: 'Nunito', Arial, sans-serif;
  color: #1a1a2e;
}
.ps-close {
  position: absolute;
  top: 10px; right: 10px;
  z-index: 10;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(0,0,0,0.06);
  border: none;
  color: #6b7280;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}
.ps-close:hover { background: rgba(0,0,0,0.1); }

/* Slides viewport & track */
.ps-viewport {
  flex: 1;
  position: relative;
  overflow: hidden;
  min-height: 0;
  width: 100%;
}
.ps-track {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.ps-slide {
  flex: 0 0 100%;
  min-width: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 28px 20px 8px;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: none;           /* Firefox */
  -ms-overflow-style: none;        /* IE/Edge */
}
.ps-slide::-webkit-scrollbar { display: none; } /* Chrome/Safari */
.ps-emoji { font-size: 32px; margin-bottom: 8px; line-height: 1.2; }
.ps-title {
  font-family: 'Fredoka', 'Nunito', Arial, sans-serif;
  font-size: 17px;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 8px;
}
.ps-body {
  font-size: 14px;
  line-height: 1.5;
  color: #6b7280;
  margin-bottom: 12px;
}
.ps-body strong { color: #1a1a2e; font-weight: 700; }

/* Controls */
.ps-controls {
  flex-shrink: 0;
  padding: 8px 20px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.ps-dots { display: flex; gap: 8px; }
.ps-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: #d1d5db;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: background 0.3s, box-shadow 0.3s;
}
.ps-dot.ps-active { background: #4E81EE; box-shadow: 0 0 8px rgba(78,129,238,0.5); }
.ps-btn-row { display: flex; gap: 10px; width: 100%; }
.ps-btn {
  font-family: 'Fredoka', 'Nunito', Arial, sans-serif;
  font-size: 15px;
  font-weight: 600;
  border: none;
  border-radius: 50px;
  min-height: 48px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: box-shadow 0.3s cubic-bezier(0.4,0,0.2,1), transform 0.3s cubic-bezier(0.4,0,0.2,1);
  -webkit-tap-highlight-color: transparent;
}
.ps-btn:active { transform: scale(0.96); }
.ps-btn-primary {
  background: linear-gradient(135deg, #4E81EE, #3a6fd8);
  color: #fff;
}
.ps-btn-primary:hover { box-shadow: 0 4px 18px rgba(78,129,238,0.45); }
.ps-btn-green {
  background: linear-gradient(135deg, #2ECC71, #27ae60);
  color: #fff;
}
.ps-btn-green:hover { box-shadow: 0 4px 18px rgba(46,204,113,0.45); }
.ps-btn-ghost {
  background: transparent;
  border: 1px solid #d1d5db;
  color: #6b7280;
}
.ps-btn-ghost:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.08); }
.ps-btn-full { width: 100%; }
.ps-btn-flex1 { flex: 1; }
.ps-btn-flex15 { flex: 1.5; }

/* Checkbox */
.ps-dontshow {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.ps-checkbox {
  width: 18px; height: 18px;
  border-radius: 5px;
  border: 2px solid #d1d5db;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, border-color 0.2s;
  flex-shrink: 0;
}
.ps-checkbox.ps-checked {
  background: #4E81EE;
  border-color: #4E81EE;
}
.ps-checkbox svg {
  width: 11px; height: 11px;
  opacity: 0;
  transition: opacity 0.2s;
}
.ps-checkbox.ps-checked svg { opacity: 1; }
.ps-dontshow-label {
  font-size: 12px;
  color: #9ca3af;
  user-select: none;
}

/* Slide 1: Card grid demo */
.ps-grid-demo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  width: 100%;
  max-width: 220px;
  margin: auto;
}
.ps-gc {
  position: relative;
  height: 80px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Fredoka', 'Nunito', Arial, sans-serif;
  font-weight: 500;
  font-size: 18px;
  transition: background 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease, color 0.4s ease;
  overflow: hidden;
}
.ps-gc-blue {
  background: linear-gradient(180deg, #5a9cf5, #4E81EE);
  color: #fff;
  border: 2px solid rgba(255,255,255,0.25);
  box-shadow: 0 3px 8px rgba(78,129,238,0.3);
}
.ps-gc-orange {
  background: linear-gradient(180deg, #fde8c8, #fbd5a0);
  color: #1a1a2e;
  border: 2px solid rgba(245,158,11,0.2);
  box-shadow: 0 3px 8px rgba(245,158,11,0.2);
}
.ps-gc-qmark {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #e8713a;
  font-weight: 500;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
.ps-gc-revealed {
  animation: ps-pulse-orange 1s ease-in-out infinite;
}
@keyframes ps-pulse-orange {
  0%, 100% { box-shadow: 0 0 0 0px rgba(245,158,11,0.15), 0 3px 8px rgba(245,158,11,0.2); }
  50% { box-shadow: 0 0 0 3px rgba(245,158,11,0.25), 0 3px 12px rgba(245,158,11,0.3); }
}
.ps-gc-green {
  background: linear-gradient(180deg, #5cd97f, #2ECC71) !important;
  border-color: rgba(255,255,255,0.3) !important;
  box-shadow: 0 3px 8px rgba(46,204,113,0.3) !important;
  color: #1a5e30 !important;
  animation: none !important;
}
.ps-gc-green .ps-gc-qmark,
.ps-gc-green .ps-gc-numcircle {
  background: rgba(255,255,255,0.5);
  color: #1a5e30;
}
.ps-cursor {
  position: absolute;
  width: 22px; height: 22px;
  z-index: 5;
  opacity: 0;
  transition: opacity 0.25s, transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
  filter: drop-shadow(0 2px 3px rgba(0,0,0,0.25));
}

/* Slide 2: Pill bars */
.ps-games-list {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 4px;
  margin-bottom: 6px;
}
.ps-game-row {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}
.ps-game-label {
  font-family: 'Fredoka', 'Nunito', Arial, sans-serif;
  font-size: 12px;
  font-weight: 600;
  color: #1a1a2e;
}
.ps-game-hint {
  font-family: 'Nunito', Arial, sans-serif;
  font-size: 11px;
  color: #9ca3af;
  line-height: 1.3;
}
.ps-game-hint strong { color: #6b7280; font-weight: 700; }
.ps-pill {
  width: 70%;
  height: 18px;
  border-radius: 50px;
  background: rgba(0,0,0,0.9);
  position: relative;
  overflow: hidden;
}
.ps-pill-fill {
  position: absolute;
  top: 0; left: 0; bottom: 0;
  border-radius: 50px;
  width: 0%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: width 1.2s cubic-bezier(0.34, 1.2, 0.64, 1);
}
.ps-pill-fill.ps-blue { background: linear-gradient(90deg, #4E81EE, #6a9bf5); }
.ps-pill-fill.ps-purple { background: linear-gradient(90deg, #9B59B6, #b07cc9); }
.ps-pill-fill.ps-red { background: linear-gradient(90deg, #E74C3C, #f06050); }
.ps-pill-text {
  font-family: 'Fredoka', 'Nunito', Arial, sans-serif;
  font-size: 9px;
  font-weight: 600;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0,0,0,0.5);
  white-space: nowrap;
}
.ps-games-footer {
  font-size: 13px;
  color: #6b7280;
  margin-top: 10px;
}

/* Slide 3: Coin demo */
.ps-coin-demo {
  background: #f3f4f6;
  border-radius: 10px;
  width: 100%;
  padding: 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-top: 6px;
  min-height: 100px;
  position: relative;
  overflow: hidden;
}
.ps-streak {
  font-family: 'Fredoka', 'Nunito', Arial, sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: #1a1a2e;
  min-height: 32px;
  display: flex;
  align-items: center;
  gap: 2px;
}
.ps-coin-reward {
  font-family: 'Fredoka', 'Nunito', Arial, sans-serif;
  font-size: 20px;
  font-weight: 700;
  color: #f59e0b;
  opacity: 0;
  transform: translateY(10px) scale(0.8);
  transition: opacity 0.3s, transform 0.4s cubic-bezier(0.34, 1.4, 0.64, 1);
  min-height: 28px;
}
.ps-coin-reward.ps-show {
  opacity: 1;
  transform: translateY(0) scale(1);
}
.ps-sparkles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.ps-sparkle {
  position: absolute;
  font-size: 14px;
  opacity: 0;
  animation: ps-sparkle-pop 0.6s ease-out forwards;
}
@keyframes ps-sparkle-pop {
  0% { opacity: 0; transform: scale(0.3) translateY(0); }
  40% { opacity: 1; transform: scale(1); }
  100% { opacity: 0; transform: scale(0.5) translateY(-30px); }
}
/* END PLAY SLIDER */

/* ══════════════════════════════════════════════
   PRACTICE SLIDER (Practice tab onboarding)
   ══════════════════════════════════════════════ */
/* Reset scoped to card */
.pt-card, .pt-card * { box-sizing: border-box; }
/* Overlay */
.pt-overlay {
  position: fixed;
  inset: 0;
  z-index: 1400;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
/* Card */
.pt-card {
  position: relative;
  width: calc(100% - 24px);
  max-width: 320px;
  height: 480px;
  max-height: calc(100% - 24px);
  border-radius: 20px;
  background: #fff;
  border: 1.5px solid rgba(0,0,0,0.08);
  box-shadow: 0 20px 60px rgba(0,0,0,0.25), 0 0 40px rgba(0,0,0,0.08);
  font-family: 'Nunito', Arial, sans-serif;
  color: #1a1a2e;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
/* Close */
.pt-close {
  position: absolute;
  top: 10px; right: 10px;
  z-index: 10;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(0,0,0,0.06);
  border: none;
  color: #6b7280;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}
.pt-close:hover { background: rgba(0,0,0,0.1); }
/* Viewport & track */
.pt-viewport {
  flex: 1;
  position: relative;
  overflow: hidden;
  min-height: 0;
  width: 100%;
}
.pt-track {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.pt-slide {
  flex: 0 0 100%;
  min-width: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 28px 24px 12px;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.pt-slide::-webkit-scrollbar { display: none; }
.pt-slide-emoji { font-size: 32px; margin-bottom: 6px; line-height: 1.2; }
.pt-slide-title {
  font-family: 'Fredoka', 'Nunito', Arial, sans-serif;
  font-size: 17px;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 6px;
}
.pt-slide-body {
  font-size: 14px;
  line-height: 1.5;
  color: #6b7280;
  margin-bottom: 10px;
}
.pt-slide-body strong { color: #1a1a2e; font-weight: 700; }
/* Controls */
.pt-controls {
  flex-shrink: 0;
  padding: 0 24px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.pt-dots { display: flex; gap: 8px; }
.pt-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #d1d5db;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: background 0.3s, box-shadow 0.3s;
}
.pt-dot.pt-active { background: #4E81EE; box-shadow: 0 0 8px rgba(78,129,238,0.5); }
.pt-nav { display: flex; gap: 10px; width: 100%; }
.pt-btn {
  font-family: 'Fredoka', 'Nunito', Arial, sans-serif;
  font-size: 15px;
  font-weight: 600;
  border: none;
  border-radius: 50px;
  min-height: 48px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: box-shadow 0.3s cubic-bezier(0.4,0,0.2,1), transform 0.3s cubic-bezier(0.4,0,0.2,1);
  -webkit-tap-highlight-color: transparent;
  flex: 1;
}
.pt-btn:active { transform: scale(0.96); }
.pt-btn-primary {
  background: linear-gradient(135deg, #4E81EE, #3a6fd8);
  color: #fff;
}
.pt-btn-primary:hover { box-shadow: 0 4px 18px rgba(78,129,238,0.45); }
.pt-btn-green {
  background: linear-gradient(135deg, #2ECC71, #27ae60);
  color: #fff;
}
.pt-btn-green:hover { box-shadow: 0 4px 18px rgba(46,204,113,0.45); }
.pt-btn-ghost {
  background: transparent;
  border: 1px solid #d1d5db;
  color: #6b7280;
}
.pt-btn-ghost:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.08); }
/* Checkbox */
.pt-dontshow {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.pt-checkbox {
  width: 18px; height: 18px;
  border-radius: 5px;
  border: 2px solid #d1d5db;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, border-color 0.2s;
  flex-shrink: 0;
}
.pt-checkbox.pt-checked {
  background: #4E81EE;
  border-color: #4E81EE;
}
.pt-checkbox svg {
  width: 11px; height: 11px;
  opacity: 0;
  transition: opacity 0.2s;
}
.pt-checkbox.pt-checked svg { opacity: 1; }
.pt-dontshow-label {
  font-size: 12px;
  color: #9ca3af;
  user-select: none;
}
/* ── Slide 1: Hover-to-Highlight Grid ── */
.pt-grid-demo {
  position: relative;
  width: 100%;
  max-width: 240px;
  margin: auto;
}
.pt-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 5px;
  width: 100%;
}
.pt-gc {
  height: 42px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Nunito', Arial, sans-serif;
  font-size: 15px;
  font-weight: 400;
  color: rgba(255,255,255,0.85);
  border: 1.5px solid rgba(255,255,255,0.35);
  transition: background 0.3s, color 0.3s, border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}
.pt-gc-default {
  background: linear-gradient(160deg, #c4cfe0, #a8b8ce);
}
.pt-gc-q-active {
  background: linear-gradient(160deg, #5a9cf5, #4E81EE) !important;
  color: #fff !important;
  border-color: rgba(255,255,255,0.5) !important;
  transform: scale(1.05);
  box-shadow: 0 3px 12px rgba(78,129,238,0.4);
}
.pt-gc-a-active {
  background: linear-gradient(160deg, #5cd97f, #2ECC71) !important;
  color: #fff !important;
  border-color: rgba(255,255,255,0.5) !important;
  transform: scale(1.05);
  box-shadow: 0 3px 12px rgba(46,204,113,0.4);
}
.pt-cursor {
  position: absolute;
  width: 20px; height: 20px;
  z-index: 5;
  opacity: 0;
  pointer-events: none;
  filter: drop-shadow(1px 2px 2px rgba(0,0,0,0.25));
  transition: left 0.55s cubic-bezier(0.4,0,0.2,1), top 0.55s cubic-bezier(0.4,0,0.2,1), opacity 0.3s;
}
@keyframes pt-cursor-click {
  0%,100% { transform: scale(1); }
  50% { transform: scale(0.82); }
}
.pt-cursor-click { animation: pt-cursor-click 0.2s ease; }
.pt-speaker-float {
  position: absolute;
  font-size: 24px;
  opacity: 0;
  pointer-events: none;
  z-index: 6;
}
@keyframes pt-speaker-pop {
  0% { opacity: 0; transform: scale(0.7) translateY(0); }
  30% { opacity: 1; transform: scale(1.15) translateY(-6px); }
  100% { opacity: 0; transform: scale(0.9) translateY(-18px); }
}
.pt-speaker-anim { animation: pt-speaker-pop 0.7s ease forwards; }
/* ── Slide 2: Auto-Play Demo ── */
.pt-autoplay-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: 220px;
  margin: auto;
}
.pt-autoplay-cards {
  display: flex;
  gap: 10px;
  width: 100%;
}
.pt-ap-card {
  flex: 1;
  height: 72px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Fredoka', 'Nunito', Arial, sans-serif;
  font-weight: 700;
  font-size: 20px;
  color: #fff;
  position: relative;
}
.pt-ap-q { background: linear-gradient(180deg, #5a9cf5, #4E81EE); }
.pt-ap-a { background: linear-gradient(180deg, #5cd97f, #2ECC71); }
.pt-ap-playbtn {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4E81EE, #3a6fd8);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: default;
  box-shadow: 0 2px 8px rgba(78,129,238,0.3);
}
@keyframes pt-speaker-pulse {
  0%,100% { opacity: 0.4; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.1); }
}
.pt-speaker {
  position: absolute;
  top: 4px; right: 4px;
  font-size: 14px;
  opacity: 0.4;
}
.pt-speaker-active { animation: pt-speaker-pulse 0.6s ease 2; }
/* ── Slide 3: Toggle Cards/Slides ── */
.pt-toggle-demo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: 240px;
  margin: auto;
}
.pt-toggle-pill {
  display: flex;
  background: #f0f0f4;
  border-radius: 20px;
  overflow: hidden;
  font-family: 'Fredoka', 'Nunito', Arial, sans-serif;
  font-size: 12px;
  font-weight: 600;
}
.pt-toggle-opt {
  padding: 5px 14px;
  color: #9ca3af;
  transition: background 0.35s, color 0.35s;
  border-radius: 20px;
}
.pt-toggle-opt.pt-tog-active {
  background: #4E81EE;
  color: #fff;
}
.pt-view-area {
  width: 100%;
  height: 120px;
  position: relative;
  overflow: hidden;
  border-radius: 10px;
}
.pt-mini-grid {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: 4px;
  padding: 4px;
  background: #dce4f0;
  border-radius: 10px;
  transition: opacity 0.4s;
}
.pt-mini-gc {
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Nunito', Arial, sans-serif;
  font-size: 10px;
  font-weight: 400;
  color: rgba(255,255,255,0.9);
}
.pt-mini-gc-q { background: linear-gradient(160deg, #5a9cf5, #4E81EE); }
.pt-mini-gc-a { background: linear-gradient(160deg, #5cd97f, #2ECC71); }
.pt-mini-grid.pt-grid-dimmed { opacity: 0.35; }
.pt-slide-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  gap: 6px;
  padding: 14px 10px;
  align-items: stretch;
  z-index: 2;
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
}
.pt-slide-overlay-card {
  flex: 1;
  border-radius: 8px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Nunito', Arial, sans-serif;
  font-weight: 700;
}
.pt-so-q {
  border: 2.5px solid #4E81EE;
  font-size: 18px;
  color: #1a1a2e;
}
.pt-so-a {
  border: 2.5px solid #2ECC71;
  font-size: 26px;
  color: #2ECC71;
}
/* END PRACTICE SLIDER */

/* ─── Language Launch Modal ─────────────────────────────────────────────
   Shown briefly when a URL-driven language or voice change occurs
   (e.g. /jp/ → Japanese + Keiko). Auto-dismisses after ~2.5s. Click
   anywhere dismisses early. Purely informational — not blocking.
─────────────────────────────────────────────────────────────────────── */
.lang-launch-modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.35);
  z-index: 9999;
  opacity: 0;
  pointer-events: auto;
  transition: opacity 0.25s ease-out;
  font-family: 'Nunito', Arial, sans-serif;
}
.lang-launch-modal.visible { opacity: 1; }
.lang-launch-modal.dismissing { opacity: 0; pointer-events: none; }

.lang-launch-modal__card {
  background: #ffffff;
  border-radius: 22px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
  padding: 16px 28px 16px 16px;
  min-width: 280px;
  max-width: 85vw;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 16px;
  transform: translateY(8px) scale(0.98);
  transition: transform 0.25s ease-out;
}
.lang-launch-modal.visible .lang-launch-modal__card {
  transform: translateY(0) scale(1);
}

.lang-launch-modal__avatar {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  overflow: hidden;
  background: #e7e7f0;
}
.lang-launch-modal__avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.lang-launch-modal__text {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.lang-launch-modal__voice-name {
  font-size: 22px;
  font-weight: 700;
  color: #1a1a2e;
  line-height: 1.1;
}

.lang-launch-modal__lang-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lang-launch-modal__lang-name {
  font-size: 18px;
  font-weight: 600;
  color: #1a1a2e;
}

.lang-launch-modal__flag {
  width: 28px;
  height: 20px;
  flex-shrink: 0;
  border-radius: 3px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.08);
  object-fit: cover;
}

.lang-launch-modal__label {
  color: #6b7280;
  font-size: 14px;
  font-weight: 500;
  margin-left: auto;
}

@media (prefers-reduced-motion: reduce) {
  .lang-launch-modal,
  .lang-launch-modal__card {
    transition: none;
  }
}
/* END LANGUAGE LAUNCH MODAL */