/* ==========================================================================
   MINT AI — APPLE DESIGN SYSTEM & WORKSPACE STYLESHEET
   Pure Browser Architecture • Zero Build Step • SF Pro Typography
   ========================================================================== */

/* ==========================================================================
   1. DESIGN TOKENS (LIGHT MODE DEFAULT)
   ========================================================================== */
:root {
  /* Color Palette - Light Mode Canvas & Surfaces */
  --bg-app: #F5F5F7;                       /* Apple off-white canvas */
  --bg-surface: #FFFFFF;                   /* Pure white surface */
  --bg-card: rgba(255, 255, 255, 0.82);    /* Frosted glass card fill */
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --bg-subtle: #EBECEF;                    /* Track background for segmented pills */
  --bg-glass: rgba(255, 255, 255, 0.75);   /* Top navigation frosted glass */
  --bg-elevated: #FFFFFF;                  /* Modals, popovers, dropdowns */
  --bg-input: #FFFFFF;                     /* Form input fields */

  /* Text & Content Colors - Light Mode */
  --text-main: #1D1D1F;                    /* Apple dark graphite body text */
  --text-muted: #6E6E73;                   /* Secondary descriptions & labels */
  --text-subtle: #86868B;                  /* Tertiary footnotes & placeholders */
  --text-inverse: #FFFFFF;                 /* White text on solid mint buttons */

  /* Fresh Mint Green Palette - Light Mode */
  --mint-primary: #00A368;                 /* Crisp accessible forest mint */
  --mint-hover: #008F5B;                   /* Deeper mint on hover */
  --mint-active: #007A4D;                  /* Active tap state */
  --mint-soft: #E8F8F2;                    /* Pastel mint wash for badges */
  --mint-soft-hover: #D7F4E8;
  --mint-border: rgba(0, 163, 104, 0.25);
  --mint-glow: rgba(0, 163, 104, 0.20);    /* Ambient mint box shadow */

  /* Semantic Status Colors (Apple HIG) */
  --color-danger: #FF3B30;                 /* Apple Red */
  --color-danger-soft: #FFEBEA;
  --color-warning: #FF9500;                /* Apple Amber / Gold */
  --color-warning-soft: #FFF4E5;
  --color-success: #34C759;                /* Apple Green */
  --color-success-soft: #EBF9EE;
  --color-info: #007AFF;                   /* Apple Blue */
  --color-info-soft: #EBF4FF;

  /* Borders & Hairlines */
  --border-subtle: rgba(0, 0, 0, 0.08);    /* Hairline borders */
  --border-card: rgba(0, 0, 0, 0.06);      /* Subtle card border */
  --border-focus: var(--mint-primary);     /* Keyboard focus ring */

  /* Elevation & Shadows */
  --shadow-subtle: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-card: 0 8px 24px -4px rgba(0, 0, 0, 0.07);
  --shadow-card-hover: 0 12px 32px -4px rgba(0, 0, 0, 0.10);
  --shadow-float: 0 16px 40px -8px rgba(0, 0, 0, 0.14);
  --shadow-mint-glow: 0 0 16px rgba(0, 163, 104, 0.35);

  /* Apple Squircle Border-Radius Tokens */
  --radius-xs: 6px;                        /* Micro badges & tags */
  --radius-sm: 10px;                       /* Small buttons & inputs */
  --radius-md: 14px;                       /* Standard buttons & controls */
  --radius-lg: 20px;                       /* Content cards & panels */
  --radius-card: 20px;                     /* Compatibility token for test suites */
  --radius-button: 12px;
  --radius-xl: 26px;                       /* Modal dialogues & hero containers */
  --radius-pill: 9999px;                   /* Capsule badges & sliding pill */

  /* Typography Stacks */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "SF Pro", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "ui-monospace", "Cascadia Code", "Segoe UI Mono", Menlo, Monaco, Consolas, monospace;

  /* Apple Type Scale */
  --font-size-hero: 30px;
  --font-size-h1: 24px;
  --font-size-h2: 20px;
  --font-size-h3: 17px;
  --font-size-body: 15px;
  --font-size-callout: 14px;
  --font-size-subhead: 13px;
  --font-size-footnote: 12px;
  --font-size-caption: 11px;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-loose: 1.65;

  /* Apple Spring Physics Transition Curves */
  --spring-snappy: cubic-bezier(0.2, 0.8, 0.2, 1);
  --spring-bounce: cubic-bezier(0.175, 0.885, 0.32, 1.25);
  --spring-sheet: cubic-bezier(0.32, 0.72, 0, 1);
  --ease-apple: cubic-bezier(0.25, 0.1, 0.25, 1);

  /* Touch Target Standard */
  --min-touch-size: 40px;
}

/* ==========================================================================
   2. DESIGN TOKENS (DARK MODE OVERRIDES)
   ========================================================================== */
[data-theme="dark"] {
  /* Color Palette - Dark Mode Canvas & Surfaces */
  --bg-app: #000000;                       /* Pure OLED black canvas */
  --bg-surface: #1C1C1E;                   /* Apple space gray surface */
  --bg-card: rgba(28, 28, 30, 0.78);       /* Space gray frosted glass fill */
  --bg-card-hover: rgba(44, 44, 46, 0.88);
  --bg-subtle: #2C2C2E;                    /* Subdued track background */
  --bg-glass: rgba(28, 28, 30, 0.78);      /* Navigation bar glass */
  --bg-elevated: #2C2C2E;                  /* Modals, menus, dropdowns */
  --bg-input: #242426;                     /* Form input fields */

  /* Text & Content Colors - Dark Mode */
  --text-main: #F5F5F7;                    /* Crisp off-white text */
  --text-muted: #A1A1A6;                   /* Medium gray secondary labels */
  --text-subtle: #6E6E73;                  /* Dim footnote & placeholder */
  --text-inverse: #000000;                 /* Black text on neon mint buttons */

  /* Radiant Mint Green Palette - Dark Mode */
  --mint-primary: #00E599;                 /* Radiant electric neon mint */
  --mint-hover: #33FFB2;                   /* Bright mint on hover */
  --mint-active: #00C781;                  /* Active state */
  --mint-soft: rgba(0, 229, 153, 0.14);    /* Luminous mint tint */
  --mint-soft-hover: rgba(0, 229, 153, 0.22);
  --mint-border: rgba(0, 229, 153, 0.30);
  --mint-glow: rgba(0, 229, 153, 0.35);    /* Electric ambient box shadow */

  /* Semantic Status Colors (Dark Mode) */
  --color-danger: #FF453A;
  --color-danger-soft: rgba(255, 69, 58, 0.16);
  --color-warning: #FF9F0A;
  --color-warning-soft: rgba(255, 159, 10, 0.16);
  --color-success: #30D158;
  --color-success-soft: rgba(48, 209, 88, 0.16);
  --color-info: #0A84FF;
  --color-info-soft: rgba(10, 132, 255, 0.16);

  /* Borders & Hairlines */
  --border-subtle: rgba(255, 255, 255, 0.12);
  --border-card: rgba(255, 255, 255, 0.08);

  /* Elevation & Shadows */
  --shadow-subtle: 0 2px 8px rgba(0, 0, 0, 0.40);
  --shadow-card: 0 8px 24px -4px rgba(0, 0, 0, 0.55);
  --shadow-card-hover: 0 12px 32px -4px rgba(0, 0, 0, 0.70);
  --shadow-float: 0 16px 40px -8px rgba(0, 0, 0, 0.80);
  --shadow-mint-glow: 0 0 20px rgba(0, 229, 153, 0.45);
}

/* ==========================================================================
   3. BASE RESET & ACCESSIBILITY
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-body);
  line-height: var(--line-height-normal);
  color: var(--text-main);
  background-color: var(--bg-app);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color 0.25s var(--ease-apple), color 0.25s var(--ease-apple);
}

/* Skip link for screen readers */
.skip-link {
  position: absolute;
  top: -60px;
  left: 20px;
  background: var(--mint-primary);
  color: var(--text-inverse);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 999;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

/* Visually Hidden Helper for Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus Visible Styling */
:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* Reduced Motion Preference */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   4. APPLE FROSTED GLASS & SQUIRCLE UTILITIES
   ========================================================================== */
.apple-glass-card,
.apple-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 24px;
  transition: transform 0.22s var(--spring-snappy), box-shadow 0.22s var(--spring-snappy), background-color 0.2s ease;
}

.apple-glass-card:hover,
.apple-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
  background: var(--bg-card-hover);
}

/* Button Base Styles */
.apple-button,
.apple-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: var(--font-size-callout);
  font-weight: 600;
  padding: 10px 18px;
  border-radius: var(--radius-button);
  border: 1px solid transparent;
  cursor: pointer;
  user-select: none;
  min-height: var(--min-touch-size);
  transition: transform 0.16s var(--spring-snappy), background-color 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.apple-button:active,
.apple-btn:active {
  transform: scale(0.96);
}

.apple-button.btn-primary,
.apple-btn-primary {
  background-color: var(--mint-primary);
  color: var(--text-inverse);
  box-shadow: 0 4px 14px var(--mint-glow);
}

.apple-button.btn-primary:hover,
.apple-btn-primary:hover {
  background-color: var(--mint-hover);
  box-shadow: 0 6px 20px var(--mint-glow);
}

.apple-button.btn-secondary,
.apple-btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-subtle);
}

.apple-button.btn-secondary:hover,
.apple-btn-secondary:hover {
  background-color: var(--bg-subtle);
}

.apple-button.btn-tool {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-size: var(--font-size-subhead);
  padding: 8px 14px;
}

.apple-button.btn-tool:hover {
  background: var(--mint-soft);
  border-color: var(--mint-border);
  color: var(--mint-primary);
}

.apple-button.btn-full {
  width: 100%;
}

.apple-button.btn-danger-outline {
  background: transparent;
  border: 1px solid var(--color-danger);
  color: var(--color-danger);
}

.apple-button.btn-danger-outline:hover {
  background: var(--color-danger-soft);
}

/* ==========================================================================
   5. APPLE NAVIGATION BAR
   ========================================================================== */
.apple-nav-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background: var(--bg-glass);
  backdrop-filter: blur(24px) saturate(190%);
  -webkit-backdrop-filter: blur(24px) saturate(190%);
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

/* Brand Identity Pill */
.brand-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
  text-decoration: none;
  color: var(--text-main);
}

.brand-icon {
  color: var(--mint-primary);
  filter: drop-shadow(0 2px 4px var(--mint-glow));
}

.brand-title {
  font-size: var(--font-size-h3);
  font-weight: 700;
  letter-spacing: -0.4px;
}

.brand-accent {
  color: var(--mint-primary);
}

.brand-badge {
  font-size: var(--font-size-caption);
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-pill);
  background: var(--mint-soft);
  color: var(--mint-primary);
  letter-spacing: 0.4px;
}

/* Apple Segmented Control: Role Switcher */
.role-switcher-container {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 4px;
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  user-select: none;
}

.role-switcher-pill {
  position: absolute;
  top: 4px;
  left: 4px;
  height: calc(100% - 8px);
  width: calc(50% - 4px);
  background: var(--bg-surface);
  border-radius: calc(var(--radius-md) - 3px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
  transition: transform 0.28s var(--spring-sheet);
  z-index: 1;
}

/* Slide to student pill position */
[data-active-role="student"] .role-switcher-pill,
#roleSwitcher[data-active-role="student"] .role-switcher-pill,
body.role-student .role-switcher-pill {
  transform: translateX(100%);
}

.role-btn {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 7px 18px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: var(--font-size-callout);
  font-weight: 500;
  cursor: pointer;
  transition: color 0.18s ease;
  min-height: 34px;
}

.role-btn svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s var(--spring-bounce);
}

.role-btn.active {
  color: var(--text-main);
  font-weight: 600;
}

.role-btn.active svg {
  transform: scale(1.1);
  color: var(--mint-primary);
}

/* Nav Actions Group (Right) */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Mints Wallet Container */
.mints-wallet-container {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--mint-soft);
  border: 1px solid var(--mint-border);
  padding: 4px 8px;
  border-radius: var(--radius-pill);
}

.mints-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  border: none;
  background: transparent;
  color: var(--mint-primary);
  font-family: var(--font-sans);
  font-size: var(--font-size-callout);
  font-weight: 600;
  cursor: pointer;
  padding: 2px 4px;
}

.mint-coin-icon {
  color: var(--mint-primary);
}

.mints-count {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.daily-bonus-btn {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: var(--mint-primary);
  color: var(--text-inverse);
  border: none;
  padding: 4px 8px;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-caption);
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.16s var(--spring-snappy), background-color 0.2s ease;
}

.daily-bonus-btn:hover {
  background: var(--mint-hover);
  transform: scale(1.05);
}

/* Puter Auth Button */
.auth-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-size: var(--font-size-subhead);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.16s var(--spring-snappy);
}

.auth-btn:hover {
  background: var(--bg-subtle);
}

.auth-btn:active {
  transform: scale(0.96);
}

/* Theme Toggle Button */
.theme-toggle-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.16s var(--spring-snappy);
}

.theme-toggle-btn:hover {
  background: var(--bg-subtle);
  color: var(--text-main);
}

.theme-toggle-btn:active {
  transform: scale(0.92);
}

/* Sun/Moon icon visibility toggling */
[data-theme="dark"] .theme-toggle-btn .icon-moon {
  display: none !important;
}

[data-theme="dark"] .theme-toggle-btn .icon-sun {
  display: block !important;
  color: var(--color-warning);
}

:root:not([data-theme="dark"]) .theme-toggle-btn .icon-sun {
  display: none !important;
}

:root:not([data-theme="dark"]) .theme-toggle-btn .icon-moon {
  display: block !important;
}

/* ==========================================================================
   6. MAIN APPLICATION WORKSPACE LAYOUT
   ========================================================================== */
.app-main {
  flex: 1;
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
  padding: 28px 24px 60px;
}

/* Role Visibility Control */
body.role-teacher .student-only {
  display: none !important;
}

body.role-student .teacher-only {
  display: none !important;
}

/* Teacher Workspace: 2-Column Responsive Grid */
#teacherWorkspace {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 28px;
  align-items: start;
}

/* Left Generator Panel */
.generator-panel {
  position: sticky;
  top: 76px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.panel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 4px;
}

.panel-title {
  font-size: var(--font-size-h2);
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-main);
}

.panel-subtitle {
  font-size: var(--font-size-subhead);
  color: var(--text-muted);
  margin-top: 4px;
  line-height: 1.4;
}

/* AI Memory Indicator Pill */
.memory-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: var(--radius-pill);
  background: var(--mint-soft);
  border: 1px solid var(--mint-border);
  color: var(--mint-primary);
  font-family: var(--font-sans);
  font-size: var(--font-size-caption);
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.16s var(--spring-snappy), background-color 0.2s ease;
}

.memory-badge-pill:hover {
  background: var(--mint-soft-hover);
  transform: scale(1.03);
}

/* Form Groups and Inputs */
.generator-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.field-count {
  grid-column: span 2;
}

.form-label {
  font-size: var(--font-size-subhead);
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: -0.1px;
}

.apple-select,
.apple-input-text,
.apple-input-number,
.apple-textarea {
  width: 100%;
  font-family: var(--font-sans);
  font-size: var(--font-size-body);
  color: var(--text-main);
  background-color: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  min-height: 42px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.2s ease;
}

.apple-select:focus,
.apple-input-text:focus,
.apple-input-number:focus,
.apple-textarea:focus {
  border-color: var(--mint-primary);
  box-shadow: 0 0 0 3px var(--mint-soft);
  outline: none;
}

.stepper-input {
  display: flex;
  align-items: center;
  gap: 10px;
}

.stepper-unit {
  font-size: var(--font-size-subhead);
  color: var(--text-muted);
}

/* Question Format Chips Grid */
.formats-fieldset {
  border: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.format-chips-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.format-chip {
  position: relative;
  cursor: pointer;
  user-select: none;
}

.format-chip input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.chip-label {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  transition: border-color 0.18s ease, background-color 0.18s ease, box-shadow 0.18s ease;
}

.format-chip:hover .chip-label {
  border-color: var(--mint-border);
  background: var(--mint-soft);
}

.format-chip input[type="checkbox"]:checked + .chip-label {
  border-color: var(--mint-primary);
  background: var(--mint-soft);
  box-shadow: 0 0 0 1px var(--mint-primary);
}

.chip-title {
  font-size: var(--font-size-subhead);
  font-weight: 600;
  color: var(--text-main);
}

.format-chip input[type="checkbox"]:checked + .chip-label .chip-title {
  color: var(--mint-primary);
}

.chip-desc {
  font-size: var(--font-size-caption);
  color: var(--text-muted);
  line-height: 1.3;
}

/* Generator Footer */
.generator-footer {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
}

.cost-summary {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--font-size-subhead);
}

.cost-label {
  color: var(--text-muted);
}

.cost-badge {
  font-weight: 700;
  color: var(--mint-primary);
  background: var(--mint-soft);
  padding: 3px 8px;
  border-radius: var(--radius-pill);
}

.cost-note {
  font-size: var(--font-size-caption);
  color: var(--text-subtle);
}

.btn-generate {
  width: 100%;
  background-color: var(--mint-primary);
  color: var(--text-inverse);
  box-shadow: 0 4px 14px var(--mint-glow);
  padding: 12px 20px;
}

.btn-generate:hover {
  background-color: var(--mint-hover);
  box-shadow: 0 6px 20px var(--mint-glow);
}

/* ==========================================================================
   7. RESULTS TOOLBAR & QUESTION CARDS FEED
   ========================================================================== */
.test-results-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
}

.results-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
}

.toolbar-info {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.active-test-title {
  font-size: var(--font-size-h3);
  font-weight: 700;
  color: var(--text-main);
}

.test-meta-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.meta-pill {
  font-size: var(--font-size-footnote);
  font-weight: 600;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  background: var(--bg-subtle);
  color: var(--text-muted);
}

.toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

/* Question Cards Feed */
.question-cards-feed,
.student-questions-feed {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.question-card,
.student-q-card {
  position: relative;
  border-left: 4px solid var(--mint-primary);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.q-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.q-number-pill {
  font-size: var(--font-size-footnote);
  font-weight: 700;
  background: var(--mint-primary);
  color: var(--text-inverse);
  padding: 3px 9px;
  border-radius: var(--radius-pill);
}

.q-format-pill {
  font-size: var(--font-size-footnote);
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-subtle);
  padding: 3px 9px;
  border-radius: var(--radius-pill);
}

.q-marks-badge,
.marks-badge,
.q-marks-pill {
  font-size: var(--font-size-footnote);
  font-weight: 700;
  color: var(--mint-primary);
  background: var(--mint-soft);
  padding: 3px 9px;
  border-radius: var(--radius-pill);
}

.q-text,
.q-prompt {
  font-size: var(--font-size-body);
  line-height: var(--line-height-loose);
  color: var(--text-main);
  margin-bottom: 16px;
}

/* Model Answer & Rubric Accordion */
.rubric-accordion {
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 16px;
  border-left: 3px solid var(--mint-primary);
}

.rubric-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--font-size-subhead);
  font-weight: 600;
  color: var(--mint-primary);
  cursor: pointer;
  user-select: none;
}

.rubric-content {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: var(--font-size-callout);
  color: var(--text-main);
}

.model-answer-block p {
  margin-top: 4px;
  color: var(--text-muted);
  line-height: var(--line-height-normal);
}

.step-rubric-table {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 6px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 8px;
}

.rubric-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: var(--font-size-footnote);
}

.rubric-criterion {
  color: var(--text-muted);
}

.rubric-points {
  font-weight: 600;
  color: var(--mint-primary);
  white-space: nowrap;
}

/* Feedback Actions Footer */
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
}

.feedback-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.feedback-label {
  font-size: var(--font-size-footnote);
  color: var(--text-muted);
}

.btn-thumb {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  padding: 4px 10px;
  font-size: var(--font-size-caption);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.16s var(--spring-snappy);
}

.btn-thumb:hover {
  background: var(--bg-subtle);
  color: var(--text-main);
}

.btn-thumb.active-positive {
  background: var(--mint-soft);
  color: var(--mint-primary);
  border-color: var(--mint-primary);
}

.btn-thumb.active-negative {
  background: var(--color-danger-soft);
  color: var(--color-danger);
  border-color: var(--color-danger);
}

/* ==========================================================================
   8. STUDENT WORKSPACE
   ========================================================================== */
#studentWorkspace {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.student-header-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.student-meta-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.student-test-title {
  font-size: var(--font-size-h2);
  font-weight: 700;
  color: var(--text-main);
}

.student-test-sub {
  font-size: var(--font-size-subhead);
  color: var(--text-muted);
  margin-top: 4px;
}

.timer-widget {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
}

.timer-display {
  font-family: var(--font-mono);
  font-size: var(--font-size-body);
  font-weight: 700;
  color: var(--mint-primary);
}

.btn-timer-toggle {
  background: var(--mint-primary);
  color: var(--text-inverse);
  border: none;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-caption);
  font-weight: 600;
  cursor: pointer;
}

.student-instructions {
  background: var(--mint-soft);
  border: 1px solid var(--mint-border);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-callout);
  color: var(--text-main);
  line-height: 1.4;
}

.student-input-container {
  margin-top: 10px;
}

.student-answer-box {
  width: 100%;
  resize: vertical;
}

.btn-reveal-key {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-footnote);
  cursor: pointer;
  transition: all 0.16s ease;
}

.btn-reveal-key:hover {
  background: var(--bg-subtle);
  color: var(--text-main);
}

.student-rubric-reveal {
  margin-top: 12px;
  padding: 12px 14px;
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--mint-primary);
  font-size: var(--font-size-callout);
}

.student-actions-bar {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 12px;
}

/* ==========================================================================
   9. ACCESSIBLE MODALS (<dialog>) & TOASTS
   ========================================================================== */
.apple-glass-dialog {
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-float);
  color: var(--text-main);
  padding: 0;
  max-width: 480px;
  width: 90%;
  margin: auto;
  overflow: hidden;
}

.apple-glass-dialog::backdrop {
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.dialog-content {
  position: relative;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.btn-close-dialog {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-pill);
  border: none;
  background: var(--bg-subtle);
  color: var(--text-muted);
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.18s ease;
}

.btn-close-dialog:hover {
  background: var(--border-subtle);
  color: var(--text-main);
}

.dialog-title {
  font-size: var(--font-size-h2);
  font-weight: 700;
  letter-spacing: -0.3px;
}

.dialog-desc {
  font-size: var(--font-size-callout);
  color: var(--text-muted);
  line-height: 1.45;
}

.mints-status-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px;
  background: var(--mint-soft);
  border: 1px solid var(--mint-border);
  border-radius: var(--radius-lg);
}

.mints-big-number {
  font-size: 42px;
  font-weight: 800;
  color: var(--mint-primary);
  line-height: 1;
}

.mints-big-label {
  font-size: var(--font-size-subhead);
  color: var(--text-muted);
  margin-top: 6px;
}

.bonus-section,
.refill-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}

.bonus-text {
  font-size: var(--font-size-footnote);
  color: var(--text-muted);
}

.bonus-timer {
  font-size: var(--font-size-caption);
  color: var(--color-warning);
  font-weight: 600;
}

.refill-title {
  font-size: var(--font-size-subhead);
  color: var(--text-main);
  font-weight: 600;
}

/* Rule input form in memory dialog */
.rule-input-group {
  display: flex;
  gap: 8px;
}

.memory-rules-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 200px;
  overflow-y: auto;
}

.memory-rule-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: var(--font-size-subhead);
}

.btn-remove-rule {
  border: none;
  background: transparent;
  color: var(--text-subtle);
  cursor: pointer;
  font-size: 14px;
}

.btn-remove-rule:hover {
  color: var(--color-danger);
}

/* Toast Container & Notification Item */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast-item {
  pointer-events: auto;
  background: var(--bg-elevated);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-float);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--font-size-callout);
  font-weight: 500;
  color: var(--text-main);
  animation: toastSlideIn 0.28s var(--spring-bounce) forwards;
}

.toast-item.toast-exit {
  opacity: 0;
  transform: translateY(12px) scale(0.95);
  transition: all 0.25s ease;
}

@keyframes toastSlideIn {
  from {
    transform: translateY(20px) scale(0.92);
    opacity: 0;
  }
  to {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

/* ==========================================================================
   10. RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 1024px) {
  #teacherWorkspace {
    grid-template-columns: 340px 1fr;
    gap: 20px;
  }
}

@media (max-width: 800px) {
  .nav-container {
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }

  .nav-actions {
    width: 100%;
    justify-content: space-between;
  }

  #teacherWorkspace {
    grid-template-columns: 1fr;
  }

  .generator-panel {
    position: static;
  }

  .app-main {
    padding: 16px 16px 48px;
  }
}

@media (max-width: 480px) {
  .format-chips-grid,
  .form-row {
    grid-template-columns: 1fr;
  }

  .role-btn {
    padding: 6px 12px;
    font-size: var(--font-size-subhead);
  }

  .toolbar-actions {
    width: 100%;
  }

  .toolbar-actions .apple-button {
    width: 100%;
  }
}

/* ==========================================================================
   11. DEDICATED A4 WORKSHEET PRINT STYLES
   ========================================================================== */
.printable-worksheet {
  display: none;
}

@media print {
  @page {
    size: A4 portrait;
    margin: 15mm 15mm 20mm 15mm;
  }

  /* Hide interactive web UI controls */
  header,
  nav,
  .apple-nav-bar,
  .role-switcher-container,
  .nav-actions,
  .generator-panel,
  .results-toolbar,
  .apple-button,
  .btn-thumb,
  .btn-reveal-key,
  .student-actions-bar,
  .timer-widget,
  .apple-glass-dialog,
  .toast-container,
  .skip-link,
  .no-print {
    display: none !important;
  }

  /* Pure black text on crisp white paper */
  html, body {
    background: #FFFFFF !important;
    color: #000000 !important;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif !important;
    font-size: 11pt !important;
    line-height: 1.5 !important;
  }

  /* Hide interactive web workspaces during paper printout */
  .app-main,
  #teacherWorkspace,
  #studentWorkspace {
    display: none !important;
  }

  /* Display dedicated printable A4 worksheet container */
  .printable-worksheet {
    display: block !important;
    width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
  }

  /* A4 Printable Page Structure */
  .print-page {
    width: 100%;
    margin: 0 0 20pt 0;
    padding: 0;
    box-sizing: border-box;
    page-break-after: always;
    break-after: page;
  }

  .print-page:last-child {
    page-break-after: auto;
    break-after: auto;
    margin-bottom: 0;
  }

  /* Structured Academic Exam Header */
  .print-exam-header {
    border: 2pt solid #000000;
    border-radius: 4px;
    padding: 12pt 16pt;
    margin-bottom: 16pt;
    text-align: center;
    background: #FFFFFF !important;
  }

  .print-exam-header.master-header {
    border: 2pt double #000000;
    background: #FAFAFA !important;
  }

  .school-title {
    font-size: 15pt;
    font-weight: 800;
    letter-spacing: 0.5pt;
    text-transform: uppercase;
    margin-bottom: 4pt;
    color: #000000 !important;
  }

  .exam-title {
    font-size: 12pt;
    font-weight: 600;
    color: #222222 !important;
    margin-bottom: 10pt;
    padding-bottom: 6pt;
    border-bottom: 1pt solid #CCCCCC;
  }

  .meta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8pt 16pt;
    text-align: left;
    font-size: 10.5pt;
  }

  .meta-field {
    color: #000000 !important;
    line-height: 1.4;
  }

  .meta-field strong {
    font-weight: 700;
  }

  /* Print Questions Feed & Card Formatting */
  .print-questions-body {
    display: flex;
    flex-direction: column;
    gap: 14pt;
  }

  .print-question-card,
  .question-card,
  .student-q-card {
    page-break-inside: avoid;
    break-inside: avoid;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    backdrop-filter: none !important;
    border-bottom: 1pt dashed #888888 !important;
    padding: 0 0 12pt 0 !important;
    margin-bottom: 14pt !important;
  }

  .q-meta {
    display: flex;
    align-items: center;
    gap: 8pt;
    margin-bottom: 6pt;
  }

  .q-number-pill,
  .q-marks-badge,
  .marks-badge,
  .q-marks-pill {
    background: transparent !important;
    color: #000000 !important;
    border: 1pt solid #000000 !important;
    padding: 2pt 6pt !important;
    font-size: 9pt !important;
    font-weight: bold !important;
  }

  .q-format-pill {
    display: none !important;
  }

  .q-text,
  .q-prompt {
    font-size: 11pt !important;
    line-height: 1.5 !important;
    color: #000000 !important;
    margin-bottom: 8pt !important;
  }

  /* Ruled handwriting lines for student physical handout */
  .student-input-container,
  .ruled-answer-lines {
    display: block !important;
    margin-top: 8pt !important;
  }

  .student-answer-box {
    display: none !important;
  }

  .student-input-container::after,
  .ruled-answer-lines::after {
    content: "";
    display: block;
    height: 60pt;
    background-image: repeating-linear-gradient(
      transparent,
      transparent 19pt,
      #999999 19pt,
      #999999 20pt
    );
    margin-top: 6pt;
    border-bottom: 1pt solid #999999;
  }

  /* Dynamic handwriting line heights */
  .lines-short::after { height: 40pt; }
  .lines-medium::after { height: 80pt; }
  .lines-long::after { height: 140pt; }

  /* Student Paper: Hide all teacher answers, rubrics, and feedback */
  .print-student-paper .rubric-accordion,
  .print-student-paper .rubric-content,
  .print-student-paper .model-answer-block,
  .print-student-paper .step-rubric-table,
  .print-student-paper .student-rubric-reveal,
  .print-student-paper .btn-reveal-key,
  .print-student-paper .card-footer {
    display: none !important;
  }

  /* Teacher Master Section: Forced to fresh page */
  .teacher-master-section,
  .print-teacher-paper {
    page-break-before: always !important;
    break-before: always !important;
    padding-top: 14pt;
  }

  /* Teacher Master Section: Show answers & rubrics, suppress ruled student lines */
  .print-teacher-paper .student-input-container::after,
  .print-teacher-paper .ruled-answer-lines::after {
    display: none !important;
  }

  .print-teacher-paper .rubric-accordion {
    display: block !important;
    background: transparent !important;
    border: none !important;
    border-left: 2pt solid #000000 !important;
    padding: 6pt 10pt !important;
    margin-top: 8pt !important;
  }

  .print-teacher-paper .rubric-content {
    display: block !important;
    color: #000000 !important;
  }

  .print-teacher-paper .model-answer-block {
    display: block !important;
    margin-bottom: 6pt !important;
  }

  .print-teacher-paper .model-answer-block strong {
    font-weight: 700;
  }

  .print-teacher-paper .step-rubric-table {
    display: flex !important;
    border-top: 1pt solid #CCCCCC !important;
    padding-top: 6pt !important;
  }

  .print-teacher-paper .rubric-row {
    display: flex;
    justify-content: space-between;
    font-size: 9.5pt;
    padding: 2pt 0;
  }

  .print-teacher-paper .rubric-points {
    font-weight: 700;
    color: #000000 !important;
  }

  /* Mode-Specific Print Selectors */
  body.print-mode-student .print-teacher-paper {
    display: none !important;
  }

  body.print-mode-teacher .print-student-paper {
    display: none !important;
  }
}


/* ==========================================================================
   CONVERSATIONAL WORKSPACE & ONBOARDING STYLES (NEW CLEAN APPLE FLOW)
   ========================================================================== */

.mint-app-body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background-color: var(--bg-app);
  color: var(--text-main);
  font-family: var(--font-sans);
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* 1. Onboarding Screens (Auth & Role Selection) */
.onboarding-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: radial-gradient(circle at 50% 20%, rgba(0, 163, 104, 0.08) 0%, transparent 60%), var(--bg-app);
  animation: fadeInOnboarding 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fadeInOnboarding {
  from { opacity: 0; transform: scale(0.97) translateY(12px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.auth-card,
.role-card-wrapper {
  width: 100%;
  max-width: 520px;
  padding: 40px 36px;
  border-radius: 28px;
  background: var(--bg-card);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-float);
  text-align: center;
}

.auth-brand {
  margin-bottom: 28px;
}

.brand-icon-wrap {
  width: 68px;
  height: 68px;
  margin: 0 auto 16px;
  border-radius: 20px;
  background: var(--mint-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px var(--mint-glow);
}

.auth-title {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin: 0 0 8px 0;
}

.brand-accent {
  color: var(--mint-primary);
}

.auth-subtitle {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.45;
  margin: 0;
}

.auth-form {
  text-align: left;
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.apple-input {
  width: 100%;
  box-sizing: border-box;
  padding: 12px 16px;
  font-size: 15px;
  border-radius: 14px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-input);
  color: var(--text-main);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.apple-input:focus {
  border-color: var(--mint-primary);
  box-shadow: 0 0 0 3px var(--mint-soft);
}

.btn-block {
  width: 100%;
  justify-content: center;
  padding: 14px 20px;
  font-size: 15px;
  font-weight: 600;
}

.auth-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 20px 0;
  color: var(--text-subtle);
  font-size: 12px;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border-subtle);
}

.auth-divider span {
  padding: 0 10px;
}

/* 2. Role Selection Grid */
.role-card-wrapper {
  max-width: 680px;
}

.role-selection-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin: 24px 0 28px;
  text-align: left;
}

@media (max-width: 640px) {
  .role-selection-grid {
    grid-template-columns: 1fr;
  }
}

.role-option-card {
  position: relative;
  padding: 24px;
  border-radius: 20px;
  background: var(--bg-surface);
  border: 2px solid var(--border-card);
  cursor: pointer;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-subtle);
}

.role-option-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
  border-color: rgba(0, 163, 104, 0.4);
}

.role-option-card.selected {
  border-color: var(--mint-primary);
  background: var(--mint-soft);
  box-shadow: 0 8px 24px var(--mint-glow);
}

.role-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.role-name {
  font-size: 19px;
  font-weight: 700;
  margin: 0 0 6px 0;
  color: var(--text-main);
}

.role-desc {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.45;
  margin: 0;
}

.role-check-indicator {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--mint-primary);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  opacity: 0;
  transform: scale(0.6);
  transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.role-option-card.selected .role-check-indicator {
  opacity: 1;
  transform: scale(1);
}

/* 3. Main Conversational Studio Workspace */
.app-workspace {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.app-topbar {
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 100;
  flex-shrink: 0;
}

.topbar-left,
.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-text {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.current-role-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: var(--mint-soft);
  color: var(--mint-primary);
  font-size: 13px;
  font-weight: 600;
}

.btn-role-switch-link {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 11px;
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
}

.btn-role-switch-link:hover {
  color: var(--mint-primary);
}

.sources-status-pill,
.mints-badge,
.btn-bonus-claim,
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-main);
  transition: all 0.15s ease;
}

.sources-status-pill:hover,
.mints-badge:hover,
.btn-bonus-claim:hover,
.theme-toggle-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--mint-border);
}

.btn-bonus-claim {
  background: var(--mint-primary);
  color: #FFFFFF;
  border-color: transparent;
}

.btn-bonus-claim:hover {
  background: var(--mint-hover);
  color: #FFFFFF;
}

.user-profile-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--bg-subtle);
  font-size: 13px;
  font-weight: 500;
}

.btn-logout {
  background: transparent;
  border: none;
  color: var(--text-subtle);
  cursor: pointer;
  padding: 0 4px;
  font-size: 12px;
}

.btn-logout:hover {
  color: var(--color-danger);
}

/* 4. Chat Main Container */
.chat-main-container {
  flex: 1;
  overflow-y: auto;
  padding: 32px 24px 180px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.chat-hero-section {
  width: 100%;
  max-width: 760px;
  text-align: center;
  margin: 36px 0 24px;
}

.hero-sparkle {
  font-size: 38px;
  margin-bottom: 12px;
  animation: floatSparkle 3s ease-in-out infinite;
}

@keyframes floatSparkle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.chat-hero-title {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin: 0 0 10px 0;
}

.chat-hero-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.5;
  max-width: 580px;
  margin: 0 auto 30px auto;
}

.suggestion-chips-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 20px;
}

.suggestion-chip {
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  box-shadow: var(--shadow-subtle);
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

.suggestion-chip:hover {
  transform: translateY(-2px);
  border-color: var(--mint-primary);
  background: var(--mint-soft);
  color: var(--mint-primary);
  box-shadow: 0 4px 12px var(--mint-glow);
}

/* 5. Chat Feed & Messages */
.chat-feed {
  width: 100%;
  max-width: 780px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.chat-message-row {
  display: flex;
  flex-direction: column;
  width: 100%;
  animation: messageSlideIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes messageSlideIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.user-message-bubble {
  align-self: flex-end;
  max-width: 75%;
  padding: 14px 20px;
  border-radius: 20px 20px 4px 20px;
  background: var(--mint-primary);
  color: #FFFFFF;
  font-size: 15px;
  line-height: 1.45;
  box-shadow: 0 4px 14px var(--mint-glow);
}

.ai-response-wrapper {
  align-self: flex-start;
  width: 100%;
}

.ai-message-bubble {
  padding: 16px 20px;
  border-radius: 20px 20px 20px 4px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-card);
  color: var(--text-main);
  font-size: 15px;
  line-height: 1.5;
  box-shadow: var(--shadow-subtle);
  margin-bottom: 16px;
}

.thinking-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border-radius: 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  color: var(--text-muted);
  font-size: 14px;
  width: fit-content;
}

.thinking-dots {
  display: flex;
  gap: 4px;
}

.thinking-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--mint-primary);
  animation: bounceDot 1.4s infinite ease-in-out both;
}

.thinking-dots span:nth-child(1) { animation-delay: -0.32s; }
.thinking-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounceDot {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1); }
}

/* 6. Generated Test Paper inside Chat */
.generated-test-paper {
  border-radius: 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  margin-top: 12px;
}

.test-paper-header {
  padding: 20px 24px;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.test-paper-title {
  font-size: 19px;
  font-weight: 700;
  margin: 0;
  color: var(--text-main);
}

.test-paper-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.paper-actions-bar {
  padding: 12px 24px;
  display: flex;
  gap: 10px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-subtle);
}

.test-paper-questions {
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* 7. Floating Chat Input Bar */
.chat-input-container {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 24px 20px 24px;
  background: linear-gradient(to top, var(--bg-app) 70%, transparent 100%);
  pointer-events: none;
  z-index: 90;
}

.attached-sources-preview {
  pointer-events: auto;
  width: 100%;
  max-width: 780px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  margin-bottom: 8px;
  border-radius: 14px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-card);
  font-size: 12.5px;
  overflow-x: auto;
}

.sources-label {
  font-weight: 600;
  color: var(--text-muted);
  flex-shrink: 0;
}

.sources-tags-list {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.source-tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  background: var(--mint-soft);
  color: var(--mint-primary);
  font-size: 11.5px;
  font-weight: 600;
}

.btn-remove-source-tag {
  background: transparent;
  border: none;
  color: var(--mint-primary);
  cursor: pointer;
  padding: 0;
  font-size: 11px;
}

.chat-input-bar {
  pointer-events: auto;
  width: 100%;
  max-width: 780px;
  padding: 8px 10px 8px 14px;
  border-radius: 28px;
  background: var(--bg-card);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-float);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.chat-input-bar:focus-within {
  border-color: var(--mint-primary);
  box-shadow: 0 16px 40px -8px rgba(0, 163, 104, 0.25);
}

.btn-add-sources {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  background: var(--mint-soft);
  color: var(--mint-primary);
  border: 1px solid var(--mint-border);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.15s ease;
}

.btn-add-sources:hover {
  background: var(--mint-soft-hover);
  transform: scale(1.02);
}

.input-field-wrap {
  flex: 1;
  display: flex;
  align-items: center;
}

.chat-textarea {
  width: 100%;
  border: none;
  background: transparent;
  color: var(--text-main);
  font-family: inherit;
  font-size: 15px;
  line-height: 1.4;
  outline: none;
  resize: none;
  max-height: 120px;
  padding: 6px 4px;
}

.chat-textarea::placeholder {
  color: var(--text-subtle);
}

.quick-options-wrap {
  flex-shrink: 0;
}

.apple-select-mini {
  padding: 7px 10px;
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-main);
  font-size: 12.5px;
  font-weight: 500;
  outline: none;
  cursor: pointer;
}

.btn-send-message {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--mint-primary);
  color: #FFFFFF;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 12px var(--mint-glow);
}

.btn-send-message:hover {
  background: var(--mint-hover);
  transform: scale(1.06);
}

.btn-send-message:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.input-subtext {
  font-size: 11.5px;
  color: var(--text-subtle);
  margin-top: 6px;
  text-align: center;
}

/* 8. Sources & Wallet Modals */
.apple-modal {
  border: none;
  border-radius: 28px;
  padding: 0;
  background: var(--bg-elevated);
  color: var(--text-main);
  box-shadow: var(--shadow-float);
  max-width: 540px;
  width: 90vw;
  outline: none;
}

.apple-modal::backdrop {
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.modal-content {
  padding: 28px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.modal-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.modal-badge-icon {
  font-size: 22px;
}

.modal-title {
  font-size: 20px;
  font-weight: 700;
  margin: 0;
}

.btn-modal-close {
  background: var(--bg-subtle);
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.15s;
}

.btn-modal-close:hover {
  background: var(--border-subtle);
  color: var(--text-main);
}

.modal-description {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.45;
  margin: 0 0 18px 0;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
}

.file-upload-btn {
  display: block;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px dashed var(--mint-primary);
  background: var(--mint-soft);
  color: var(--mint-primary);
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 12px;
  transition: background 0.15s;
}

.file-upload-btn:hover {
  background: var(--mint-soft-hover);
}

.wallet-balance-box {
  padding: 20px;
  border-radius: 18px;
  background: var(--mint-soft);
  text-align: center;
  margin-bottom: 20px;
}

.wallet-title {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--mint-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.wallet-number-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 8px 0;
}

.wallet-coin {
  font-size: 26px;
}

.wallet-val {
  font-size: 38px;
  font-weight: 800;
  color: var(--mint-primary);
}

.wallet-currency {
  font-size: 18px;
  font-weight: 600;
  color: var(--mint-primary);
}

.wallet-rate {
  font-size: 12.5px;
  color: var(--text-muted);
  margin: 0;
}

.refill-options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.refill-card {
  padding: 16px;
  border-radius: 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  text-align: center;
}

.refill-card h4 {
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 4px 0;
}

.refill-card p {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0 0 12px 0;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}


/* ==========================================================================
   UNIFIED LOGIN & STICKY FLOATING TYPE BAR (FOLLOWS USER EVERYWHERE)
   ========================================================================== */

/* 1. Unified Login Role Segmented Picker */
.role-segmented-picker {
  display: flex;
  background: var(--bg-subtle);
  padding: 4px;
  border-radius: 16px;
  gap: 6px;
  margin-top: 6px;
}

.role-segment-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border: none;
  border-radius: 12px;
  background: transparent;
  color: var(--text-muted);
  font-size: 14.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.role-segment-btn:hover {
  color: var(--text-main);
}

.role-segment-btn.active {
  background: var(--bg-surface);
  color: var(--mint-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.role-hint {
  font-size: 12.5px;
  color: var(--text-muted);
  margin: 8px 0 0 2px;
}

/* 2. Floating Bar Container (Follows User Everywhere) */
.chat-floating-bar-wrapper {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 16px 14px 16px;
  background: linear-gradient(to top, var(--bg-app) 75%, transparent 100%);
  pointer-events: none;
  z-index: 1000;
}

.floating-input-card {
  pointer-events: auto;
  width: 100%;
  max-width: 840px;
  padding: 14px 18px;
  border-radius: 24px;
  background: var(--bg-card);
  backdrop-filter: blur(28px) saturate(190%);
  -webkit-backdrop-filter: blur(28px) saturate(190%);
  border: 1px solid var(--border-card);
  box-shadow: 0 20px 48px -12px rgba(0, 0, 0, 0.2), 0 0 0 1px var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.floating-input-card:focus-within {
  border-color: var(--mint-primary);
  box-shadow: 0 24px 56px -12px rgba(0, 163, 104, 0.28), 0 0 0 1px var(--mint-border);
}

/* Floating Controls Row (Grade, Topic, Count, Add Sources) */
.floating-controls-row {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  flex-wrap: wrap;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.control-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.control-item:nth-child(2) {
  flex: 1;
  min-width: 180px;
}

.control-label {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.apple-select-compact,
.apple-input-compact {
  padding: 8px 12px;
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-main);
  font-size: 13.5px;
  font-weight: 500;
  outline: none;
  transition: border-color 0.15s;
}

.apple-select-compact:focus,
.apple-input-compact:focus {
  border-color: var(--mint-primary);
}

.apple-input-compact {
  width: 100%;
  box-sizing: border-box;
}

/* Floating Input Row (Textarea + Send Button) */
.floating-input-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.input-textarea-wrap {
  flex: 1;
}

.floating-bar-hint {
  font-size: 11.5px;
  color: var(--text-subtle);
  margin-top: 6px;
  text-align: center;
}

/* Extra scroll padding so content never gets hidden behind the floating bar */
.chat-main-container {
  padding-bottom: 240px !important;
}