/* ============================================
   READING MODE — Merged & Scoped CSS
   Integrated from: Lets Read Chinese
   Skipped: variables.css (mapped below),
            duplicate .btn / .glass / .container / .chinese-text
   Scoped under .reading-mode-container
   ============================================ */

/* ==========================================
   §1  VARIABLE MAPPING
   Map reading-mode token names → main app vars
   ========================================== */

/* Reading Mode CSS Variable Mapping — exact values from standalone app */
.reading-mode-container {
    /* Map to main app vars with fallbacks */
    --rm-bg: var(--bg-main, #f0f9ff);
    --rm-card: var(--card-bg, #ffffff);
    --rm-text: var(--text-main, #0f172a);
    --rm-text-muted: var(--text-muted, #64748b);
    --rm-primary: var(--primary, #0ea5e9);
    --rm-secondary: var(--secondary, #10b981);
    --rm-accent: var(--accent, #8b5cf6);

    /* Base / Background */
    --color-bg-primary: #f0fdfa;
    --color-bg-secondary: rgba(224, 242, 254, 0.5);
    --color-bg-card: var(--card-bg, rgba(255, 255, 255, 0.85));
    --color-bg-elevated: rgba(255, 255, 255, 0.95);
    --color-bg-overlay: rgba(15, 23, 42, 0.5);
    --color-bg-input: rgba(255, 255, 255, 0.7);
    --color-bg-hover: rgba(14, 165, 233, 0.08);

    /* Primary — Sky Blue */
    --color-primary: var(--primary, #0ea5e9);
    --color-primary-light: #38bdf8;
    --color-primary-lighter: rgba(14, 165, 233, 0.12);
    --color-primary-dark: #0284c7;
    --color-primary-text: #ffffff;

    /* Secondary — Emerald */
    --color-secondary: var(--secondary, #10b981);
    --color-secondary-light: #34d399;
    --color-secondary-lighter: rgba(16, 185, 129, 0.12);
    --color-secondary-dark: #059669;
    --color-secondary-text: #ffffff;

    /* Accent — Violet */
    --color-accent: var(--accent, #8b5cf6);
    --color-accent-light: #a78bfa;
    --color-accent-lighter: rgba(139, 92, 246, 0.12);

    /* Text */
    --color-text-primary: var(--text-main, #0f172a);
    --color-text-secondary: var(--text-muted, #475569);
    --color-text-tertiary: #94a3b8;
    --color-text-muted: #94a3b8;
    --color-text-inverse: #ffffff;
    --color-text-link: #0ea5e9;

    /* Character States */
    --color-char-known: #0f172a;
    --color-char-unknown: #ef4444;
    --color-char-unknown-bg: rgba(239, 68, 68, 0.1);
    --color-char-learning: #f59e0b;
    --color-char-learning-bg: rgba(245, 158, 11, 0.1);

    /* Status */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #0ea5e9;

    /* Borders */
    --color-border: rgba(148, 163, 184, 0.25);
    --color-border-light: rgba(255, 255, 255, 0.3);
    --color-border-focus: #0ea5e9;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px -10px rgba(0, 0, 0, 0.15);
    --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-card-hover: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-popup: 0 16px 40px rgba(0, 0, 0, 0.15);

    /* Glass effect */
    --glass-blur: blur(12px);
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.3);

    /* Typography */
    --font-ui: 'Inter', 'Tajawal', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-chinese: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --font-light: 300;
    --font-regular: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --leading-tight: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.75;
    --leading-loose: 2;

    /* Chinese character display */
    --char-size-sm: 1.25rem;
    --char-size-md: 1.5rem;
    --char-size-lg: 2rem;
    --char-size-xl: 2.5rem;
    --char-size-display: 4rem;
    --char-line-height: 2;
    --char-letter-spacing: 0.05em;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Z-Index */
    --z-base: 0;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-overlay: 300;
    --z-modal: 400;
    --z-popup: 500;
    --z-toast: 600;

    /* Layout */
    --sidebar-width: 260px;
    --max-content-width: 800px;
    --max-reading-width: 680px;
}

/* Dark mode overrides for reading mode */
[data-theme="dark"] .reading-mode-container {
    --color-bg-primary: #0f172a;
    --color-bg-secondary: rgba(30, 27, 75, 0.5);
    --color-bg-card: rgba(30, 41, 59, 0.85);
    --color-bg-elevated: rgba(30, 41, 59, 0.95);
    --color-bg-overlay: rgba(0, 0, 0, 0.6);
    --color-bg-input: rgba(30, 41, 59, 0.7);
    --color-bg-hover: rgba(56, 189, 248, 0.1);

    --color-primary: #38bdf8;
    --color-primary-light: #7dd3fc;
    --color-primary-lighter: rgba(56, 189, 248, 0.15);
    --color-primary-dark: #0ea5e9;

    --color-secondary: #34d399;
    --color-secondary-light: #6ee7b7;
    --color-secondary-lighter: rgba(52, 211, 153, 0.15);
    --color-secondary-dark: #10b981;

    --color-accent: #a78bfa;
    --color-accent-light: #c4b5fd;
    --color-accent-lighter: rgba(167, 139, 250, 0.15);

    --color-text-primary: #f8fafc;
    --color-text-secondary: #94a3b8;
    --color-text-tertiary: #64748b;
    --color-text-link: #38bdf8;

    --color-char-known: #f8fafc;
    --color-char-unknown: #f87171;
    --color-char-unknown-bg: rgba(248, 113, 113, 0.15);
    --color-char-learning: #fbbf24;
    --color-char-learning-bg: rgba(251, 191, 36, 0.15);

    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-light: rgba(255, 255, 255, 0.06);
    --color-border-focus: #38bdf8;

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 40px -10px rgba(0, 0, 0, 0.5);
    --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.25);
    --shadow-card-hover: 0 10px 25px -5px rgba(0, 0, 0, 0.35);
    --shadow-popup: 0 16px 40px rgba(0, 0, 0, 0.45);

    --glass-bg: rgba(30, 41, 59, 0.85);
    --glass-border: rgba(255, 255, 255, 0.1);
}


/* ==========================================
   §1.5  SUB-SIDEBAR LAYOUT
   Sticky vertical tab sidebar for Reading Mode
   ========================================== */

/* Flex layout: sidebar + content */
.reading-mode-container .reading-layout {
  display: flex;
  gap: 0;
  align-items: stretch;
  min-height: calc(100vh - 120px);
}

/* Sub-sidebar — matches Netlify standalone */
.reading-mode-container .reading-sub-sidebar {
  position: sticky;
  top: 0;
  width: 220px;
  min-width: 220px;
  height: fit-content;
  min-height: 300px;
  display: flex;
  flex-direction: column;
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-right: 1px solid var(--color-border-light);
  z-index: 10;
  flex-shrink: 0;
}

/* Sidebar header */
.reading-mode-container .reading-sidebar-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-6);
  border-bottom: 1px solid var(--color-border-light);
}

/* Logo icon */
.reading-mode-container .reading-sidebar-logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--text-xl);
  font-family: var(--font-chinese);
  font-weight: var(--font-bold);
  box-shadow: var(--shadow-sm);
}

/* Logo text */
.reading-mode-container .reading-sidebar-logo-text {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  line-height: 1.2;
}

/* Navigation items */
.reading-mode-container .reading-sidebar-nav {
  flex: 1;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ---- EXACT COPY: .nav-item ---- */
.reading-mode-container .reading-nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: var(--space-1);
  position: relative;
}

.reading-mode-container .reading-nav-item:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
}

/* ---- EXACT COPY: .nav-item.active ---- */
.reading-mode-container .reading-nav-item.active {
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  font-weight: var(--font-semibold);
}

/* ---- EXACT COPY: .nav-item.active::before ---- */
.reading-mode-container .reading-nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

/* ---- EXACT COPY: .nav-item-icon ---- */
.reading-mode-container .reading-nav-icon {
  font-size: var(--text-lg);
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

/* ---- EXACT COPY: .nav-item-label ---- */
.reading-mode-container .reading-nav-label {
  flex: 1;
}

/* ---- EXACT COPY: .nav-item-badge ---- */
.reading-mode-container .reading-nav-badge {
  font-size: var(--text-xs);
  background: var(--color-primary);
  color: white;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: var(--font-semibold);
}

/* Content area fills remaining space */
.reading-mode-container .reading-content-area {
  flex: 1;
  min-width: 0;
  padding: var(--space-6);
}

/* Responsive: on small screens, collapse sidebar to horizontal top bar */
@media (max-width: 768px) {
  .reading-mode-container .reading-layout {
    flex-direction: column;
  }

  .reading-mode-container .reading-sub-sidebar {
    position: static;
    width: 100%;
    border-radius: var(--radius-lg);
    border-right: none;
    border: 1px solid var(--color-border-light);
    margin-bottom: var(--space-4);
  }

  .reading-mode-container .reading-sidebar-header {
    padding: var(--space-4);
  }

  .reading-mode-container .reading-sidebar-nav {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    padding: var(--space-3);
    gap: var(--space-1);
  }

  .reading-mode-container .reading-nav-item {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
    border-radius: var(--radius-full);
    gap: var(--space-2);
    width: auto;
    margin-bottom: 0;
  }

  .reading-mode-container .reading-nav-item.active::before {
    display: none;
  }

  .reading-mode-container .reading-content-area {
    padding: 0;
  }
}


/* ==========================================
   §1.9  SCOPED BASE STYLES from Netlify standalone
   These are needed because the components use
   .glass, .btn, .content-wrapper, .mb-8, etc.
   ========================================== */

/* ---- Typography (scoped) ---- */
.reading-mode-container h1,
.reading-mode-container h2,
.reading-mode-container h3,
.reading-mode-container h4,
.reading-mode-container h5,
.reading-mode-container h6 {
  font-family: var(--font-ui);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
}

.reading-mode-container h1 { font-size: var(--text-4xl); }
.reading-mode-container h2 { font-size: var(--text-3xl); }
.reading-mode-container h3 { font-size: var(--text-2xl); }
.reading-mode-container h4 { font-size: var(--text-xl); }
.reading-mode-container h5 { font-size: var(--text-lg); }

.reading-mode-container p {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
}

.reading-mode-container small {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

/* ---- Links ---- */
.reading-mode-container a {
  color: var(--color-text-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.reading-mode-container a:hover {
  color: var(--color-primary-dark);
}

/* ---- Buttons (base reset) ---- */
.reading-mode-container button {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
  transition: all var(--transition-base);
}
.reading-mode-container button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ---- Form Inputs ---- */
.reading-mode-container input,
.reading-mode-container textarea,
.reading-mode-container select {
  font-family: var(--font-ui);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  background-color: var(--color-bg-input);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  transition: all var(--transition-fast);
  width: 100%;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}
.reading-mode-container input:focus,
.reading-mode-container textarea:focus,
.reading-mode-container select:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-lighter);
}

/* ---- Layout ---- */
.reading-mode-container .content-wrapper {
  max-width: var(--max-content-width);
  margin: 0 auto;
}

/* ---- Glassmorphism ---- */
.reading-mode-container .glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

/* ---- Utility Classes ---- */
.reading-mode-container .text-center { text-align: center; }
.reading-mode-container .text-right { text-align: right; }
.reading-mode-container .text-primary { color: var(--color-primary); }
.reading-mode-container .text-muted { color: var(--color-text-tertiary); }

.reading-mode-container .mt-1 { margin-top: var(--space-1); }
.reading-mode-container .mt-2 { margin-top: var(--space-2); }
.reading-mode-container .mt-4 { margin-top: var(--space-4); }
.reading-mode-container .mt-6 { margin-top: var(--space-6); }
.reading-mode-container .mt-8 { margin-top: var(--space-8); }
.reading-mode-container .mb-2 { margin-bottom: var(--space-2); }
.reading-mode-container .mb-4 { margin-bottom: var(--space-4); }
.reading-mode-container .mb-6 { margin-bottom: var(--space-6); }
.reading-mode-container .mb-8 { margin-bottom: var(--space-8); }

.reading-mode-container .flex { display: flex; }
.reading-mode-container .flex-col { flex-direction: column; }
.reading-mode-container .items-center { align-items: center; }
.reading-mode-container .justify-between { justify-content: space-between; }
.reading-mode-container .justify-center { justify-content: center; }
.reading-mode-container .gap-2 { gap: var(--space-2); }
.reading-mode-container .gap-3 { gap: var(--space-3); }
.reading-mode-container .gap-4 { gap: var(--space-4); }
.reading-mode-container .gap-6 { gap: var(--space-6); }
.reading-mode-container .flex-wrap { flex-wrap: wrap; }
.reading-mode-container .flex-1 { flex: 1; }
.reading-mode-container .grid { display: grid; }
.reading-mode-container .hidden { display: none !important; }

/* ---- Buttons (component level) ---- */
.reading-mode-container .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  white-space: nowrap;
  line-height: 1;
  text-decoration: none;
}

.reading-mode-container .btn-primary {
  background: var(--color-primary);
  color: var(--color-primary-text);
  box-shadow: var(--shadow-sm);
}
.reading-mode-container .btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.reading-mode-container .btn-secondary {
  background: transparent;
  color: var(--color-secondary);
  border: 1.5px solid var(--color-secondary);
}
.reading-mode-container .btn-secondary:hover {
  background: var(--color-secondary-lighter);
  border-color: var(--color-secondary-dark);
  color: var(--color-secondary-dark);
}

.reading-mode-container .btn-success {
  background: var(--color-secondary);
  color: var(--color-secondary-text);
  box-shadow: var(--shadow-sm);
}
.reading-mode-container .btn-success:hover {
  background: var(--color-secondary-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.reading-mode-container .btn-gold {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}
.reading-mode-container .btn-gold:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.reading-mode-container .btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-3);
}
.reading-mode-container .btn-ghost:hover {
  background: var(--color-bg-hover);
  color: var(--color-primary);
}

.reading-mode-container .btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--color-text-secondary);
}
.reading-mode-container .btn-icon:hover {
  background: var(--color-bg-hover);
  color: var(--color-primary);
}

.reading-mode-container .btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
}
.reading-mode-container .btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}
.reading-mode-container .btn-group {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* ---- Cards ---- */
.reading-mode-container .card {
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}
.reading-mode-container .card:hover {
  box-shadow: var(--shadow-card-hover);
}
.reading-mode-container .card-interactive {
  cursor: pointer;
}
.reading-mode-container .card-interactive:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary-light);
}
.reading-mode-container .card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}
.reading-mode-container .card-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0;
}
.reading-mode-container .card-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-top: var(--space-1);
}
.reading-mode-container .card-body {
  color: var(--color-text-secondary);
}
.reading-mode-container .card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
}

/* ---- Badges ---- */
.reading-mode-container .badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: 20px;
  line-height: 1.4;
}
.reading-mode-container .badge-hsk1 { background: rgba(16, 185, 129, 0.12); color: #059669; }
.reading-mode-container .badge-hsk2 { background: rgba(14, 165, 233, 0.12); color: #0284c7; }
.reading-mode-container .badge-hsk3 { background: rgba(245, 158, 11, 0.12); color: #d97706; }
.reading-mode-container .badge-hsk4 { background: rgba(239, 68, 68, 0.12); color: #dc2626; }
.reading-mode-container .badge-hsk5 { background: rgba(139, 92, 246, 0.12); color: #7c3aed; }
.reading-mode-container .badge-hsk6 { background: rgba(100, 116, 139, 0.12); color: #475569; }
.reading-mode-container .badge-match-perfect { background: var(--color-secondary-lighter); color: var(--color-secondary-dark); }
.reading-mode-container .badge-match-good { background: rgba(245, 158, 11, 0.12); color: #d97706; }
.reading-mode-container .badge-match-hard { background: var(--color-primary-lighter); color: var(--color-primary); }
.reading-mode-container .badge-category { background: var(--color-bg-hover); color: var(--color-text-secondary); }
.reading-mode-container .badge-generated { background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); color: white; }

[data-theme="dark"] .reading-mode-container .badge-hsk1 { background: rgba(52, 211, 153, 0.15); color: #6ee7b7; }
[data-theme="dark"] .reading-mode-container .badge-hsk2 { background: rgba(56, 189, 248, 0.15); color: #7dd3fc; }
[data-theme="dark"] .reading-mode-container .badge-hsk3 { background: rgba(251, 191, 36, 0.15); color: #fbbf24; }
[data-theme="dark"] .reading-mode-container .badge-hsk4 { background: rgba(248, 113, 113, 0.15); color: #fca5a5; }
[data-theme="dark"] .reading-mode-container .badge-hsk5 { background: rgba(167, 139, 250, 0.15); color: #c4b5fd; }
[data-theme="dark"] .reading-mode-container .badge-hsk6 { background: rgba(148, 163, 184, 0.15); color: #cbd5e1; }

/* ---- Toggle Switch ---- */
.reading-mode-container .toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}
.reading-mode-container .toggle-track {
  width: 40px;
  height: 22px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  position: relative;
  transition: background 0.2s ease;
}
.reading-mode-container .toggle-track.active {
  background: var(--color-primary);
}
.reading-mode-container .toggle-thumb {
  width: 18px;
  height: 18px;
  background: white;
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: 2px;
  transition: transform 0.2s ease;
  box-shadow: var(--shadow-xs);
}
.reading-mode-container .toggle-track.active .toggle-thumb {
  transform: translateX(18px);
}

/* ---- Empty State ---- */
.reading-mode-container .empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-8);
}
.reading-mode-container .empty-state-icon {
  font-size: 4rem;
  margin-bottom: var(--space-4);
  opacity: 0.8;
}
.reading-mode-container .empty-state-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}
.reading-mode-container .empty-state-desc {
  color: var(--color-text-tertiary);
  max-width: 400px;
  margin: 0 auto var(--space-6);
  line-height: var(--leading-relaxed);
}

/* ---- Library ---- */
.reading-mode-container .library-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.reading-mode-container .library-filters {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.reading-mode-container .filter-btn {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all 0.2s ease;
}
.reading-mode-container .filter-btn:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}
.reading-mode-container .filter-btn.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}
.reading-mode-container .library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-4);
}
.reading-mode-container .library-empty {
  text-align: center;
  padding: var(--space-16) var(--space-8);
}
.reading-mode-container .library-empty-icon {
  font-size: var(--text-5xl);
  margin-bottom: var(--space-4);
}
.reading-mode-container .library-empty-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}
.reading-mode-container .library-empty-desc {
  color: var(--color-text-tertiary);
  max-width: 400px;
  margin: 0 auto var(--space-6);
}

/* ---- Category Tabs (Generate page) ---- */
.reading-mode-container .category-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: var(--space-3);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: 2px 0;
}
.reading-mode-container .category-tabs::-webkit-scrollbar { display: none; }
.reading-mode-container .category-tab {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 7px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  border: 1.5px solid var(--color-border-light);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  flex-shrink: 0;
}
.reading-mode-container .category-tab:hover {
  background: rgba(14, 165, 233, 0.08);
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.reading-mode-container .category-tab.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.3);
}

/* ---- Topic Selector ---- */
.reading-mode-container .topic-selector {
  position: relative;
  width: 100%;
  max-width: 600px;
  margin: 0 auto var(--space-5);
  text-align: left;
}
.reading-mode-container .topic-selector-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
  padding: 0 var(--space-1);
}
.reading-mode-container .topic-groups {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.reading-mode-container .topic-group-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
  padding-left: var(--space-1);
}
.reading-mode-container .topic-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.reading-mode-container .topic-subsection-label {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin: var(--space-2) 0 var(--space-1);
  padding-left: var(--space-1);
  opacity: 0.7;
  width: 100%;
}
.reading-mode-container .topic-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  font-size: 0.72rem;
  font-weight: 500;
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  border: 1.5px solid var(--color-border-light);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.reading-mode-container .topic-chip:hover {
  background: rgba(14, 165, 233, 0.08);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}
.reading-mode-container .topic-chip.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.3);
}

/* ---- Section Divider & Header ---- */
.reading-mode-container .section-divider {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: var(--space-8) 0 var(--space-6);
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}
.reading-mode-container .section-divider::before,
.reading-mode-container .section-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border-light);
}
.reading-mode-container .section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}
.reading-mode-container .section-header h2 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

/* ---- Passage Card (generated variant) ---- */
.reading-mode-container .passage-card-generated {
  border-color: rgba(139, 92, 246, 0.3);
  background: linear-gradient(135deg, var(--color-bg-card) 0%, rgba(139, 92, 246, 0.05) 100%);
}
.reading-mode-container .passage-card-generated:hover {
  border-color: var(--color-accent-light);
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.2);
}
[data-theme="dark"] .reading-mode-container .passage-card-generated {
  background: linear-gradient(135deg, var(--color-bg-card) 0%, rgba(167, 139, 250, 0.08) 100%);
  border-color: rgba(167, 139, 250, 0.2);
}

/* ---- Translation Panel ---- */
.reading-mode-container .translation-panel {
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  margin-top: var(--space-4);
  border-left: 3px solid var(--color-accent);
}
.reading-mode-container .translation-panel p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  font-style: italic;
  margin: 0;
}

/* ---- Search Input ---- */
.reading-mode-container .search-input-wrapper {
  position: relative;
}
.reading-mode-container .search-input-wrapper .search-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-tertiary);
  pointer-events: none;
}
.reading-mode-container .search-input {
  padding-left: var(--space-10);
}

/* ---- Generated section animation ---- */
.reading-mode-container .generated-section {
  animation: fadeInUp 400ms ease forwards;
}

/* ---- Responsive scoped ---- */
@media (max-width: 640px) {
  .reading-mode-container h1 { font-size: var(--text-3xl); }
  .reading-mode-container h2 { font-size: var(--text-2xl); }
  .reading-mode-container h3 { font-size: var(--text-xl); }
  .reading-mode-container .library-grid { grid-template-columns: 1fr; }
  .reading-mode-container .vocab-stats { grid-template-columns: repeat(2, 1fr); }
  .reading-mode-container .progress-grid { grid-template-columns: repeat(2, 1fr); }
  .reading-mode-container .topic-chip { font-size: 0.68rem; padding: 4px 8px; }
  .reading-mode-container .topic-selector { max-width: 100%; }
}


/* ==========================================
   §2  BASE — Reading-specific styles
   From base.css (layout resets, .chinese-text,
   .glass, etc. skipped — main app owns those)
   ========================================== */

/* ---- Ruby (Pinyin) Annotations ---- */
.reading-mode-container ruby {
  ruby-align: center;
}

.reading-mode-container ruby rt {
  font-family: var(--font-ui);
  font-size: 0.45em;
  font-weight: var(--font-regular);
  color: var(--color-text-tertiary);
  letter-spacing: 0;
  line-height: 1;
}

.reading-mode-container .pinyin-hidden rt {
  visibility: hidden;
  font-size: 0;
}

/* ---- Chinese Text Display Variants ---- */
/* .chinese-text base already in main app — only reading-specific variants here */
.reading-mode-container .chinese-text-lg {
  font-family: var(--font-chinese);
  font-size: var(--char-size-lg);
  line-height: var(--char-line-height);
  letter-spacing: var(--char-letter-spacing);
}

.reading-mode-container .chinese-text-xl {
  font-family: var(--font-chinese);
  font-size: var(--char-size-xl);
  line-height: var(--char-line-height);
}

.reading-mode-container .chinese-text-display {
  font-family: var(--font-chinese);
  font-size: var(--char-size-display);
  line-height: 1.3;
}

/* ---- Reading Layout ---- */
.reading-mode-container .reading-wrapper {
  max-width: var(--max-reading-width);
  margin: 0 auto;
}

/* ---- View Container ---- */
.reading-mode-container .view {
  display: none;
  opacity: 0;
}

.reading-mode-container .view.active {
  display: block;
  opacity: 1;
  animation: viewFadeIn 0.3s ease forwards;
}

/* ---- Textarea (Chinese input) ---- */
.reading-mode-container textarea {
  resize: vertical;
  min-height: 100px;
  font-family: var(--font-chinese);
  font-size: var(--char-size-sm);
  line-height: var(--leading-relaxed);
}

/* ---- RTL Overrides for Reading Content ---- */
/* Now dir="rtl" is set ON .reading-mode-container itself when Arabic is active.
   Arabic labels/headings naturally flow RTL from the container.
   Chinese, Pinyin, and English content must be forced back to LTR. */

/* Force LTR for ALL Chinese content — always */
.reading-mode-container[dir="rtl"] .chinese-text,
.reading-mode-container[dir="rtl"] .chinese-text-lg,
.reading-mode-container[dir="rtl"] .chinese-text-xl,
.reading-mode-container[dir="rtl"] .chinese-text-display,
.reading-mode-container[dir="rtl"] .reading-content,
.reading-mode-container[dir="rtl"] .passage-card-preview,
.reading-mode-container[dir="rtl"] .passage-card-title,
.reading-mode-container[dir="rtl"] .passage-card-title-en,
.reading-mode-container[dir="rtl"] .translation-panel,
.reading-mode-container[dir="rtl"] .word-popup,
.reading-mode-container[dir="rtl"] .word-popup-char,
.reading-mode-container[dir="rtl"] .word-popup-pinyin,
.reading-mode-container[dir="rtl"] .word-popup-definition,
.reading-mode-container[dir="rtl"] .vocab-textarea,
.reading-mode-container[dir="rtl"] .vocab-grid,
.reading-mode-container[dir="rtl"] .vocab-grid-char,
.reading-mode-container[dir="rtl"] ruby,
.reading-mode-container[dir="rtl"] ruby rt {
  direction: ltr;
  text-align: left;
  unicode-bidi: isolate;
}

/* Word popup — stays centered in RTL mode, only direction is LTR */
.reading-mode-container[dir="rtl"] .word-popup {
  direction: ltr;
  text-align: center;
  unicode-bidi: isolate;
}
.reading-mode-container[dir="rtl"] .word-popup-char,
.reading-mode-container[dir="rtl"] .word-popup-pinyin,
.reading-mode-container[dir="rtl"] .word-popup-definition {
  direction: ltr;
  text-align: center;
  unicode-bidi: isolate;
}
/* Word popup actions — centered */
.reading-mode-container[dir="rtl"] .word-popup-actions {
  direction: ltr;
  justify-content: center;
}
.reading-mode-container[dir="rtl"] .word-popup-meta {
  direction: ltr;
  justify-content: center;
}

/* Reading content wrapper — force LTR block */
.reading-mode-container[dir="rtl"] .reading-content {
  direction: ltr;
  text-align: left;
  unicode-bidi: isolate;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* Passage header info (title, English subtitle) — LTR */
.reading-mode-container[dir="rtl"] .passage-card-header {
  direction: ltr;
  text-align: left;
}

/* English text always LTR */
.reading-mode-container[dir="rtl"] [lang="en"],
.reading-mode-container[dir="rtl"] .en-text {
  direction: ltr;
  text-align: left;
  unicode-bidi: isolate;
}

/* Reading viewer header card — mixed: keep card RTL but content LTR */
.reading-mode-container[dir="rtl"] .reader-header .passage-card-title,
.reading-mode-container[dir="rtl"] .reader-header [style*="font-size:0.9rem"] {
  direction: ltr;
  text-align: left;
}

/* Passage meta badges — stay inline LTR */
.reading-mode-container[dir="rtl"] .passage-card-meta {
  direction: ltr;
}

/* Key vocabulary list — LTR for Chinese/Pinyin/English */
.reading-mode-container[dir="rtl"] .key-vocab-list,
.reading-mode-container[dir="rtl"] .key-vocab-item {
  direction: ltr;
  text-align: left;
}

/* Comprehension quiz — Chinese questions LTR */
.reading-mode-container[dir="rtl"] .quiz-question,
.reading-mode-container[dir="rtl"] .quiz-option {
  direction: ltr;
  text-align: left;
}

/* Translation panel: English is LTR, Arabic section stays RTL */
.reading-mode-container[dir="rtl"] .translation-panel p[style*="direction:rtl"] {
  direction: rtl !important;
  text-align: right !important;
}

/* HSK quick-add buttons — LTR for "HSK 1 (148)" etc. */
.reading-mode-container[dir="rtl"] .hsk-quick-btn {
  direction: ltr;
}
.reading-mode-container[dir="rtl"] .hsk-quick-add {
  direction: rtl;
}

/* Vocab stats — keep centered, numbers are LTR */
.reading-mode-container[dir="rtl"] .vocab-stat-card {
  direction: rtl;
  text-align: center;
}
.reading-mode-container[dir="rtl"] .vocab-stat-value {
  direction: ltr;
  unicode-bidi: isolate;
}

/* Progress dashboard numbers — LTR */
.reading-mode-container[dir="rtl"] .progress-stat {
  direction: ltr;
  text-align: center;
}

/* Sidebar navigation tabs — keep LTR icon order */
.reading-mode-container[dir="rtl"] .reading-sidebar {
  direction: rtl;
}
.reading-mode-container[dir="rtl"] .reading-nav-item {
  direction: rtl;
}

/* Category tabs (HSK 1, HSK 2, etc.) — keep LTR for tab labels */
.reading-mode-container[dir="rtl"] .category-tabs {
  direction: rtl;
}

/* Topic chips — keep RTL so Arabic label reads correctly */
.reading-mode-container[dir="rtl"] .topic-chips {
  direction: rtl;
}

/* Generate button — keep centered */
.reading-mode-container[dir="rtl"] .generate-btn {
  direction: rtl;
}

/* Section headers — RTL for Arabic headings */
.reading-mode-container[dir="rtl"] .section-header {
  direction: rtl;
}

/* Library grid cards — passage preview stays LTR (Chinese text) */
.reading-mode-container[dir="rtl"] .library-grid {
  direction: rtl;
}

/* Content wrapper — RTL for labels, but inner Chinese content is LTR via other rules */
.reading-mode-container[dir="rtl"] .content-wrapper h1,
.reading-mode-container[dir="rtl"] .content-wrapper > .mb-8 > h1,
.reading-mode-container[dir="rtl"] .content-wrapper > .mb-8 > p,
.reading-mode-container[dir="rtl"] .generate-hero-title,
.reading-mode-container[dir="rtl"] .generate-hero-desc {
  direction: rtl;
  text-align: right;
}

/* Glass cards headings in RTL */
.reading-mode-container[dir="rtl"] .glass > h3,
.reading-mode-container[dir="rtl"] .glass > p {
  direction: rtl;
  text-align: right;
}

/* Buttons text — keep RTL for Arabic button labels */
.reading-mode-container[dir="rtl"] .btn {
  direction: rtl;
}

/* Keep passage card body direction for Chinese preview text */
.reading-mode-container[dir="rtl"] .passage-card .passage-card-preview {
  direction: ltr;
  text-align: left;
}

/* Passage card — let title area be RTL for Arabic topic name */
.reading-mode-container[dir="rtl"] .passage-card {
  direction: rtl;
  text-align: right;
}
/* But Chinese title inside stays LTR */
.reading-mode-container[dir="rtl"] .passage-card .passage-card-title {
  direction: ltr;
  text-align: left;
}

/* CRITICAL: Keep reading-layout LTR so sidebar stays on the LEFT */
.reading-mode-container[dir="rtl"] .reading-layout {
  direction: ltr;
}
/* But the content area itself should be RTL for Arabic text */
.reading-mode-container[dir="rtl"] .reading-content-area {
  direction: rtl;
}
/* Sidebar stays LTR layout but labels are RTL for Arabic */
.reading-mode-container[dir="rtl"] .reading-sub-sidebar {
  direction: ltr;
}
.reading-mode-container[dir="rtl"] .reading-sidebar-header {
  direction: rtl;
}
.reading-mode-container[dir="rtl"] .reading-sidebar-nav {
  direction: rtl;
}

/* Library filters row — RTL for Arabic labels */
.reading-mode-container[dir="rtl"] .library-filters {
  direction: rtl;
}
/* Filter/badge buttons — LTR for HSK numbers */
.reading-mode-container[dir="rtl"] .filter-btn {
  direction: ltr;
  unicode-bidi: isolate;
}
/* Passage card meta badges (HSK, category) — LTR */
.reading-mode-container[dir="rtl"] .badge {
  direction: ltr;
  unicode-bidi: isolate;
}
/* Empty state — RTL for Arabic text */
.reading-mode-container[dir="rtl"] .empty-state {
  direction: rtl;
}
/* New words toggle area */
.reading-mode-container[dir="rtl"] .new-words-toggle {
  direction: rtl;
}
/* Topic selector header */
.reading-mode-container[dir="rtl"] .topic-selector-header {
  direction: rtl;
  text-align: right;
}
/* Topic group labels */
.reading-mode-container[dir="rtl"] .topic-group-label {
  direction: rtl;
  text-align: right;
}
/* Topic subsection labels */
.reading-mode-container[dir="rtl"] .topic-subsection-label {
  direction: rtl;
  text-align: right;
}
/* Progress grid — RTL labels, LTR numbers */
.reading-mode-container[dir="rtl"] .progress-grid {
  direction: rtl;
}
.reading-mode-container[dir="rtl"] .progress-stat {
  direction: rtl;
  text-align: center;
}
.reading-mode-container[dir="rtl"] .progress-stat-value {
  direction: ltr;
  unicode-bidi: isolate;
}
/* Reading viewer — reader header stays RTL for back button, Chinese content LTR */
.reading-mode-container[dir="rtl"] [dir="ltr"] {
  direction: ltr;
  unicode-bidi: isolate;
}

/* ==========================================
   §3  COMPONENTS — Passage Cards
   ========================================== */

.reading-mode-container .passage-card {
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.reading-mode-container .passage-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
  border-color: var(--color-primary-light);
}

.reading-mode-container .passage-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.reading-mode-container .passage-card-title {
  font-family: var(--font-chinese);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
}

.reading-mode-container .passage-card-title-en {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-top: var(--space-1);
}

.reading-mode-container .passage-card-preview {
  font-family: var(--font-chinese);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.reading-mode-container .passage-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.reading-mode-container .passage-card-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.reading-mode-container .passage-card-match {
  position: absolute;
  top: 0;
  right: 0;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: 0 var(--radius-lg) 0 var(--radius-md);
}

.reading-mode-container .passage-card-match.perfect {
  background: var(--color-secondary);
  color: white;
}
.reading-mode-container .passage-card-match.good {
  background: var(--color-primary);
  color: white;
}
.reading-mode-container .passage-card-match.hard {
  background: #f59e0b;
  color: white;
}
.reading-mode-container .passage-card-match.too-hard {
  background: #ef4444;
  color: white;
}


/* ==========================================
   §4  COMPONENTS — Reading Viewer
   ========================================== */

.reading-mode-container .reading-header {
  margin-bottom: var(--space-8);
}

.reading-mode-container .reading-title {
  font-family: var(--font-chinese);
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.reading-mode-container .reading-title-en {
  font-size: var(--text-lg);
  color: var(--color-text-tertiary);
  font-weight: var(--font-regular);
}

.reading-mode-container .reading-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  margin-top: var(--space-4);
  flex-wrap: wrap;
}

.reading-mode-container .reading-content {
  font-family: var(--font-chinese);
  font-size: var(--char-size-lg);
  line-height: var(--char-line-height);
  letter-spacing: var(--char-letter-spacing);
  color: var(--color-text-primary);
  padding: var(--space-8) 0;
}

.reading-mode-container .reading-content .char {
  cursor: pointer;
  border-radius: 4px;
  padding: 1px 2px;
  transition: all 0.2s ease;
  position: relative;
}

.reading-mode-container .reading-content .char:hover {
  background: var(--color-bg-hover);
}

.reading-mode-container .reading-content .char.unknown {
  color: var(--color-char-unknown);
  background: var(--color-char-unknown-bg);
  font-weight: var(--font-medium);
}

.reading-mode-container .reading-content .char.unknown:hover {
  background: rgba(239, 68, 68, 0.18);
}

.reading-mode-container .reading-content .char.learning {
  color: var(--color-char-learning);
  background: var(--color-char-learning-bg);
}

.reading-mode-container .reading-content .punctuation {
  cursor: default;
  color: var(--color-text-tertiary);
}


/* ==========================================
   §5  COMPONENTS — Word Popup
   ========================================== */

.reading-mode-container .word-popup {
  position: fixed;
  z-index: var(--z-popup);
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-popup);
  padding: var(--space-5);
  min-width: 240px;
  max-width: 320px;
  animation: popupFadeIn 200ms ease forwards;
}

.reading-mode-container .word-popup-char {
  font-family: var(--font-chinese);
  font-size: var(--char-size-display);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  text-align: center;
  line-height: 1.2;
  margin-bottom: var(--space-2);
}

.reading-mode-container .word-popup-pinyin {
  text-align: center;
  font-size: var(--text-lg);
  color: var(--color-primary);
  font-weight: var(--font-medium);
  margin-bottom: var(--space-3);
}

.reading-mode-container .word-popup-definition {
  text-align: center;
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  line-height: var(--leading-relaxed);
}

.reading-mode-container .word-popup-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.reading-mode-container .word-popup-actions {
  display: flex;
  gap: var(--space-2);
}

.reading-mode-container .word-popup-actions .btn {
  flex: 1;
  font-size: var(--text-xs);
}


/* ==========================================
   §6  COMPONENTS — Vocabulary Input
   ========================================== */

.reading-mode-container .vocab-input-area {
  position: relative;
}

.reading-mode-container .vocab-textarea {
  min-height: 160px;
  font-family: var(--font-chinese);
  font-size: var(--char-size-md);
  line-height: var(--leading-loose);
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border: 2px dashed var(--color-border);
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: all 0.3s ease;
}

.reading-mode-container .vocab-textarea:focus {
  border-style: solid;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-lighter);
}

.reading-mode-container .vocab-textarea::placeholder {
  font-family: var(--font-ui);
  font-size: var(--text-base);
  color: var(--color-text-tertiary);
}

.reading-mode-container .hsk-quick-add {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-4);
}

.reading-mode-container .hsk-quick-btn {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  cursor: pointer;
  transition: all 0.2s ease;
  border: 2px solid transparent;
}

.reading-mode-container .hsk-quick-btn.added {
  opacity: 0.6;
}

.reading-mode-container .hsk-quick-btn:nth-child(1) { background: rgba(16, 185, 129, 0.12); color: #059669; border-color: rgba(16, 185, 129, 0.25); }
.reading-mode-container .hsk-quick-btn:nth-child(1):hover { background: rgba(16, 185, 129, 0.2); }
.reading-mode-container .hsk-quick-btn:nth-child(2) { background: rgba(14, 165, 233, 0.12); color: #0284c7; border-color: rgba(14, 165, 233, 0.25); }
.reading-mode-container .hsk-quick-btn:nth-child(2):hover { background: rgba(14, 165, 233, 0.2); }
.reading-mode-container .hsk-quick-btn:nth-child(3) { background: rgba(245, 158, 11, 0.12); color: #d97706; border-color: rgba(245, 158, 11, 0.25); }
.reading-mode-container .hsk-quick-btn:nth-child(3):hover { background: rgba(245, 158, 11, 0.2); }
.reading-mode-container .hsk-quick-btn:nth-child(4) { background: rgba(239, 68, 68, 0.12); color: #dc2626; border-color: rgba(239, 68, 68, 0.25); }
.reading-mode-container .hsk-quick-btn:nth-child(4):hover { background: rgba(239, 68, 68, 0.2); }
.reading-mode-container .hsk-quick-btn:nth-child(5) { background: rgba(139, 92, 246, 0.12); color: #7c3aed; border-color: rgba(139, 92, 246, 0.25); }
.reading-mode-container .hsk-quick-btn:nth-child(5):hover { background: rgba(139, 92, 246, 0.2); }
.reading-mode-container .hsk-quick-btn:nth-child(6) { background: rgba(120, 53, 15, 0.12); color: #92400e; border-color: rgba(120, 53, 15, 0.25); }
.reading-mode-container .hsk-quick-btn:nth-child(6):hover { background: rgba(120, 53, 15, 0.2); }

[data-theme="dark"] .reading-mode-container .hsk-quick-btn:nth-child(1) { background: rgba(52, 211, 153, 0.12); color: #6ee7b7; border-color: rgba(52, 211, 153, 0.2); }
[data-theme="dark"] .reading-mode-container .hsk-quick-btn:nth-child(1):hover { background: rgba(52, 211, 153, 0.2); }
[data-theme="dark"] .reading-mode-container .hsk-quick-btn:nth-child(2) { background: rgba(56, 189, 248, 0.12); color: #7dd3fc; border-color: rgba(56, 189, 248, 0.2); }
[data-theme="dark"] .reading-mode-container .hsk-quick-btn:nth-child(2):hover { background: rgba(56, 189, 248, 0.2); }
[data-theme="dark"] .reading-mode-container .hsk-quick-btn:nth-child(3) { background: rgba(251, 191, 36, 0.12); color: #fbbf24; border-color: rgba(251, 191, 36, 0.2); }
[data-theme="dark"] .reading-mode-container .hsk-quick-btn:nth-child(3):hover { background: rgba(251, 191, 36, 0.2); }
[data-theme="dark"] .reading-mode-container .hsk-quick-btn:nth-child(4) { background: rgba(248, 113, 113, 0.12); color: #fca5a5; border-color: rgba(248, 113, 113, 0.2); }
[data-theme="dark"] .reading-mode-container .hsk-quick-btn:nth-child(4):hover { background: rgba(248, 113, 113, 0.2); }
[data-theme="dark"] .reading-mode-container .hsk-quick-btn:nth-child(5) { background: rgba(167, 139, 250, 0.12); color: #a78bfa; border-color: rgba(167, 139, 250, 0.2); }
[data-theme="dark"] .reading-mode-container .hsk-quick-btn:nth-child(5):hover { background: rgba(167, 139, 250, 0.2); }
[data-theme="dark"] .reading-mode-container .hsk-quick-btn:nth-child(6) { background: rgba(180, 130, 80, 0.12); color: #d4a76a; border-color: rgba(180, 130, 80, 0.2); }
[data-theme="dark"] .reading-mode-container .hsk-quick-btn:nth-child(6):hover { background: rgba(180, 130, 80, 0.2); }

/* Vocabulary grid */
.reading-mode-container .vocab-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  padding: var(--space-4);
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  margin-top: var(--space-4);
  max-height: 300px;
  overflow-y: auto;
}

.reading-mode-container .vocab-grid-char {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  font-family: var(--font-chinese);
  font-size: var(--text-lg);
  color: var(--color-text-primary);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

.reading-mode-container .vocab-grid-char:hover {
  background: var(--color-primary-lighter);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: scale(1.1);
}

/* Stats bar */
.reading-mode-container .vocab-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.reading-mode-container .vocab-stat-card {
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  text-align: center;
}

.reading-mode-container .vocab-stat-value {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.reading-mode-container .vocab-stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}


/* ==========================================
   §7  COMPONENTS — Cards & Badges
   ========================================== */

.reading-mode-container .card {
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}

.reading-mode-container .card:hover {
  box-shadow: var(--shadow-card-hover);
}

.reading-mode-container .card-interactive {
  cursor: pointer;
}
.reading-mode-container .card-interactive:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary-light);
}

.reading-mode-container .card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.reading-mode-container .card-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

.reading-mode-container .card-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-top: var(--space-1);
}

.reading-mode-container .card-body {
  color: var(--color-text-secondary);
}

.reading-mode-container .card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
}

/* Badges */
.reading-mode-container .badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: 20px;
  line-height: 1.4;
}

.reading-mode-container .badge-hsk1 {
  background: rgba(16, 185, 129, 0.12);
  color: #059669;
}
.reading-mode-container .badge-hsk2 {
  background: rgba(14, 165, 233, 0.12);
  color: #0284c7;
}
.reading-mode-container .badge-hsk3 {
  background: rgba(245, 158, 11, 0.12);
  color: #d97706;
}
.reading-mode-container .badge-hsk4 {
  background: rgba(239, 68, 68, 0.12);
  color: #dc2626;
}
.reading-mode-container .badge-hsk5 {
  background: rgba(139, 92, 246, 0.12);
  color: #7c3aed;
}
.reading-mode-container .badge-hsk6 {
  background: rgba(100, 116, 139, 0.12);
  color: #475569;
}

[data-theme="dark"] .reading-mode-container .badge-hsk1 {
  background: rgba(52, 211, 153, 0.15);
  color: #6ee7b7;
}
[data-theme="dark"] .reading-mode-container .badge-hsk2 {
  background: rgba(56, 189, 248, 0.15);
  color: #7dd3fc;
}
[data-theme="dark"] .reading-mode-container .badge-hsk3 {
  background: rgba(251, 191, 36, 0.15);
  color: #fbbf24;
}
[data-theme="dark"] .reading-mode-container .badge-hsk4 {
  background: rgba(248, 113, 113, 0.15);
  color: #fca5a5;
}
[data-theme="dark"] .reading-mode-container .badge-hsk5 {
  background: rgba(167, 139, 250, 0.15);
  color: #c4b5fd;
}
[data-theme="dark"] .reading-mode-container .badge-hsk6 {
  background: rgba(148, 163, 184, 0.15);
  color: #cbd5e1;
}

.reading-mode-container .badge-match-perfect {
  background: var(--color-secondary-lighter);
  color: var(--color-secondary-dark);
}
.reading-mode-container .badge-match-good {
  background: rgba(245, 158, 11, 0.12);
  color: #d97706;
}
.reading-mode-container .badge-match-hard {
  background: var(--color-primary-lighter);
  color: var(--color-primary);
}

.reading-mode-container .badge-category {
  background: var(--color-bg-hover);
  color: var(--color-text-secondary);
}

.reading-mode-container .badge-generated {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
}


/* ==========================================
   §8  COMPONENTS — Reading Library
   ========================================== */

.reading-mode-container .library-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.reading-mode-container .library-filters {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.reading-mode-container .filter-btn {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all 0.2s ease;
}

.reading-mode-container .filter-btn:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

.reading-mode-container .filter-btn.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.reading-mode-container .library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-4);
}

.reading-mode-container .library-empty {
  text-align: center;
  padding: var(--space-16) var(--space-8);
}

.reading-mode-container .library-empty-icon {
  font-size: var(--text-5xl);
  margin-bottom: var(--space-4);
}

.reading-mode-container .library-empty-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.reading-mode-container .library-empty-desc {
  color: var(--color-text-tertiary);
  max-width: 400px;
  margin: 0 auto var(--space-6);
}


/* ==========================================
   §9  COMPONENTS — Progress Dashboard
   ========================================== */

.reading-mode-container .progress-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.reading-mode-container .progress-stat {
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
}

.reading-mode-container .progress-stat-icon {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-2);
}

.reading-mode-container .progress-stat-value {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.reading-mode-container .progress-stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

/* HSK progress bars */
.reading-mode-container .hsk-progress {
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.reading-mode-container .hsk-progress-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-5);
}

.reading-mode-container .hsk-level-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.reading-mode-container .hsk-level-label {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  width: 52px;
  flex-shrink: 0;
}

.reading-mode-container .hsk-bar-track {
  flex: 1;
  height: 12px;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.reading-mode-container .hsk-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 1s cubic-bezier(0.34, 1.56, 0.64, 1);
  min-width: 2px;
}

.reading-mode-container .hsk-bar-fill.hsk1 { background: linear-gradient(90deg, #10b981, #34d399); }
.reading-mode-container .hsk-bar-fill.hsk2 { background: linear-gradient(90deg, #0ea5e9, #38bdf8); }
.reading-mode-container .hsk-bar-fill.hsk3 { background: linear-gradient(90deg, #f59e0b, #fbbf24); }
.reading-mode-container .hsk-bar-fill.hsk4 { background: linear-gradient(90deg, #ef4444, #f87171); }

.reading-mode-container .hsk-bar-percent {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  width: 48px;
  text-align: right;
  color: var(--color-text-secondary);
}

/* Character coverage grid */
.reading-mode-container .char-coverage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(32px, 1fr));
  gap: 3px;
  padding: var(--space-4);
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
}

.reading-mode-container .char-coverage-cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-chinese);
  font-size: var(--text-xs);
  border-radius: 4px;
  transition: all 0.2s ease;
}

.reading-mode-container .char-coverage-cell.known {
  background: var(--color-secondary-lighter);
  color: var(--color-secondary);
}

.reading-mode-container .char-coverage-cell.unknown {
  background: var(--color-bg-card);
  color: var(--color-text-tertiary);
}

.reading-mode-container .char-coverage-cell:hover {
  transform: scale(1.3);
  z-index: 1;
  box-shadow: var(--shadow-sm);
}


/* ==========================================
   §10  COMPONENTS — Comprehension Quiz
   ========================================== */

.reading-mode-container .quiz-section {
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-top: var(--space-8);
}

.reading-mode-container .quiz-question {
  margin-bottom: var(--space-6);
}

.reading-mode-container .quiz-question-text {
  font-family: var(--font-chinese);
  font-size: var(--text-xl);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.reading-mode-container .quiz-question-english {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
}

.reading-mode-container .quiz-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.reading-mode-container .quiz-option {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--font-chinese);
  font-size: var(--text-lg);
}

.reading-mode-container .quiz-option:hover {
  border-color: var(--color-primary-light);
  background: var(--color-primary-lighter);
}

.reading-mode-container .quiz-option.correct {
  border-color: var(--color-secondary);
  background: var(--color-secondary-lighter);
  color: var(--color-secondary-dark);
}

.reading-mode-container .quiz-option.incorrect {
  border-color: var(--color-error);
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
}

.reading-mode-container .quiz-option.disabled {
  pointer-events: none;
  opacity: 0.7;
}


/* ==========================================
   §11  COMPONENTS — Toggle Switch
   ========================================== */

.reading-mode-container .toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.reading-mode-container .toggle-track {
  width: 40px;
  height: 22px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  position: relative;
  transition: background 0.2s ease;
}

.reading-mode-container .toggle-track.active {
  background: var(--color-primary);
}

.reading-mode-container .toggle-thumb {
  width: 18px;
  height: 18px;
  background: white;
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: 2px;
  transition: transform 0.2s ease;
  box-shadow: var(--shadow-xs);
}

.reading-mode-container .toggle-track.active .toggle-thumb {
  transform: translateX(18px);
}


/* ==========================================
   §12  COMPONENTS — Translation Panel
   ========================================== */

.reading-mode-container .translation-panel {
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  margin-top: var(--space-4);
  border-left: 3px solid var(--color-accent);
}

.reading-mode-container .translation-panel p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  font-style: italic;
  margin: 0;
}


/* ==========================================
   §13  COMPONENTS — Empty State
   ========================================== */

.reading-mode-container .empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-8);
}

.reading-mode-container .empty-state-icon {
  font-size: 4rem;
  margin-bottom: var(--space-4);
  opacity: 0.8;
}

.reading-mode-container .empty-state-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.reading-mode-container .empty-state-desc {
  color: var(--color-text-tertiary);
  max-width: 400px;
  margin: 0 auto var(--space-6);
  line-height: var(--leading-relaxed);
}


/* ==========================================
   §14  COMPONENTS — Search Input
   ========================================== */

.reading-mode-container .search-input-wrapper {
  position: relative;
}

.reading-mode-container .search-input-wrapper .search-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-tertiary);
  pointer-events: none;
}

.reading-mode-container .search-input {
  padding-left: var(--space-10);
}


/* ==========================================
   §15  COMPONENTS — Generate Hero Section
   ========================================== */

.reading-mode-container .generate-hero {
  margin-bottom: var(--space-8);
}

.reading-mode-container .generate-hero-inner {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.08) 0%, rgba(139, 92, 246, 0.1) 50%, rgba(16, 185, 129, 0.08) 100%);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-10) var(--space-8);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.reading-mode-container .generate-hero-inner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.08) 0%, transparent 60%);
  animation: heroGlow 6s ease-in-out infinite;
  pointer-events: none;
}

.reading-mode-container .generate-hero-icon {
  font-size: 3.5rem;
  margin-bottom: var(--space-4);
  position: relative;
}

.reading-mode-container .generate-hero-title {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
  position: relative;
}

.reading-mode-container .generate-hero-desc {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  max-width: 500px;
  margin: 0 auto var(--space-6);
  line-height: var(--leading-relaxed);
  position: relative;
}

.reading-mode-container .generate-btn {
  position: relative;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  font-size: var(--text-lg);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.35);
  transition: all 0.3s ease;
}

.reading-mode-container .generate-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(14, 165, 233, 0.45);
}

.reading-mode-container .generate-btn:active {
  transform: translateY(0);
}


/* ==========================================
   §16  COMPONENTS — Category & Topic Selectors
   ========================================== */

.reading-mode-container .category-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: var(--space-3);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: 2px 0;
}

.reading-mode-container .category-tabs::-webkit-scrollbar {
  display: none;
}

.reading-mode-container .category-tab {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 7px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  border: 1.5px solid var(--color-border-light);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

.reading-mode-container .category-tab:hover {
  background: rgba(14, 165, 233, 0.08);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.reading-mode-container .category-tab.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.3);
}

/* Topic Selector */
.reading-mode-container .topic-selector {
  position: relative;
  width: 100%;
  max-width: 600px;
  margin: 0 auto var(--space-5);
  text-align: left;
}

.reading-mode-container .topic-selector-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
  padding: 0 var(--space-1);
}

.reading-mode-container .topic-groups {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.reading-mode-container .topic-group-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
  padding-left: var(--space-1);
}

.reading-mode-container .topic-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.reading-mode-container .topic-subsection-label {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin: var(--space-2) 0 var(--space-1);
  padding-left: var(--space-1);
  opacity: 0.7;
  width: 100%;
}

.reading-mode-container .topic-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  font-size: 0.72rem;
  font-weight: 500;
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  border: 1.5px solid var(--color-border-light);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.reading-mode-container .topic-chip:hover {
  background: rgba(14, 165, 233, 0.08);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.reading-mode-container .topic-chip.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.3);
}


/* ==========================================
   §17  COMPONENTS — Generated Passage Card
   ========================================== */

.reading-mode-container .passage-card-generated {
  border-color: rgba(139, 92, 246, 0.3);
  background: linear-gradient(135deg, var(--color-bg-card) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.reading-mode-container .passage-card-generated:hover {
  border-color: var(--color-accent-light);
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.2);
}


/* ==========================================
   §18  COMPONENTS — Section Dividers & Headers
   ========================================== */

/* Section divider */
.reading-mode-container .section-divider {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: var(--space-8) 0 var(--space-6);
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

.reading-mode-container .section-divider::before,
.reading-mode-container .section-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border-light);
}

/* Section header */
.reading-mode-container .section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.reading-mode-container .section-header h2 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

/* Generated section */
.reading-mode-container .generated-section {
  animation: fadeInUp 400ms ease forwards;
}


/* ==========================================
   §19  COMPONENTS — Reading Sidebar
   Prefixed with .reading- to avoid conflicts
   with main app sidebar
   ========================================== */

.reading-mode-container .reading-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width, 260px);
  height: 100vh;
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-right: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  z-index: var(--z-sticky);
  transition: transform var(--transition-base);
}

.reading-mode-container .reading-sidebar-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--color-border-light);
}

.reading-mode-container .reading-sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.reading-mode-container .reading-sidebar-logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--text-xl);
  font-family: var(--font-chinese);
  font-weight: var(--font-bold);
  box-shadow: var(--shadow-sm);
}

.reading-mode-container .reading-sidebar-logo-text {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  line-height: 1.2;
}

.reading-mode-container .reading-sidebar-logo-sub {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  font-weight: var(--font-regular);
}

.reading-mode-container .reading-sidebar-nav {
  flex: 1;
  padding: var(--space-4);
  overflow-y: auto;
}

.reading-mode-container .reading-sidebar-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border-light);
}


/* ==========================================
   §20  COMPONENTS — Buttons (reading-mode specific)
   Only btn-success, btn-gold, btn-ghost, btn-sm, btn-lg
   that are NOT in the main app
   ========================================== */

.reading-mode-container .btn-success {
  background: var(--color-secondary);
  color: var(--color-secondary-text);
  box-shadow: var(--shadow-sm);
}
.reading-mode-container .btn-success:hover {
  background: var(--color-secondary-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.reading-mode-container .btn-gold {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}
.reading-mode-container .btn-gold:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.reading-mode-container .btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-3);
}
.reading-mode-container .btn-ghost:hover {
  background: var(--color-bg-hover);
  color: var(--color-primary);
}

.reading-mode-container .btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
}

.reading-mode-container .btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}


/* ==========================================
   §21  DARK MODE ADJUSTMENTS
   ========================================== */

[data-theme="dark"] .reading-mode-container .generate-hero-inner {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.08) 0%, rgba(167, 139, 250, 0.1) 50%, rgba(52, 211, 153, 0.08) 100%);
  border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .reading-mode-container .passage-card-generated {
  background: linear-gradient(135deg, var(--color-bg-card) 0%, rgba(167, 139, 250, 0.08) 100%);
  border-color: rgba(167, 139, 250, 0.2);
}

[data-theme="dark"] .reading-mode-container .reading-content .char.unknown:hover {
  background: rgba(248, 113, 113, 0.22);
}

[data-theme="dark"] .reading-mode-container .quiz-option.incorrect {
  background: rgba(248, 113, 113, 0.12);
}


/* ==========================================
   §22  RESPONSIVE — Reading Mode
   ========================================== */

@media (max-width: 1024px) {
  .reading-mode-container .reading-sidebar {
    transform: translateX(-100%);
    top: 56px;
    height: calc(100vh - 56px);
    left: 0;
    border-radius: 0;
    z-index: 1100;
  }

  .reading-mode-container .reading-sidebar .reading-sidebar-header {
    display: none;
  }

  .reading-mode-container .reading-sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-xl);
  }
}

@media (max-width: 640px) {
  .reading-mode-container .library-grid {
    grid-template-columns: 1fr;
  }

  .reading-mode-container .progress-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .reading-mode-container .vocab-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .reading-mode-container .passage-card {
    padding: var(--space-4);
  }

  .reading-mode-container .reading-content {
    font-size: var(--char-size-md);
  }

  .reading-mode-container .word-popup {
    left: var(--space-4) !important;
    right: var(--space-4) !important;
    max-width: none;
  }

  .reading-mode-container .topic-chip {
    font-size: 0.68rem;
    padding: 4px 8px;
  }

  .reading-mode-container .topic-selector {
    max-width: 100%;
  }
}


/* ==========================================
   §23  ANIMATIONS
   All keyframes from animations.css
   (unique names — no conflict risk)
   ========================================== */

/* ---- Page / View Transitions ---- */
@keyframes viewFadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes viewFadeOut {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-12px);
  }
}

/* ---- Popup ---- */
@keyframes popupFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes popupFadeOut {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(8px) scale(0.96);
  }
}

/* ---- Slide In ---- */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

/* ---- Scale ---- */
@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.5);
  }
  60% {
    opacity: 1;
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}

/* ---- Pulse for unknown characters ---- */
@keyframes subtlePulse {
  0%, 100% {
    background-color: var(--color-char-unknown-bg);
  }
  50% {
    background-color: rgba(239, 68, 68, 0.18);
  }
}

/* ---- Progress bar fill ---- */
@keyframes progressFill {
  from {
    width: 0%;
  }
}

/* ---- Shimmer / loading ---- */
@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

.reading-mode-container .skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-secondary) 25%,
    var(--color-border-light) 50%,
    var(--color-bg-secondary) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

/* ---- Number count up ---- */
@keyframes countUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---- Stagger animation helper ---- */
.reading-mode-container .stagger-item {
  opacity: 0;
  animation: slideInUp 400ms ease forwards;
}

.reading-mode-container .stagger-item:nth-child(1) { animation-delay: 0ms; }
.reading-mode-container .stagger-item:nth-child(2) { animation-delay: 50ms; }
.reading-mode-container .stagger-item:nth-child(3) { animation-delay: 100ms; }
.reading-mode-container .stagger-item:nth-child(4) { animation-delay: 150ms; }
.reading-mode-container .stagger-item:nth-child(5) { animation-delay: 200ms; }
.reading-mode-container .stagger-item:nth-child(6) { animation-delay: 250ms; }
.reading-mode-container .stagger-item:nth-child(7) { animation-delay: 300ms; }
.reading-mode-container .stagger-item:nth-child(8) { animation-delay: 350ms; }
.reading-mode-container .stagger-item:nth-child(9) { animation-delay: 400ms; }
.reading-mode-container .stagger-item:nth-child(10) { animation-delay: 450ms; }

/* ---- Confetti / celebrate ---- */
@keyframes celebrate {
  0% {
    transform: scale(1);
  }
  25% {
    transform: scale(1.15) rotate(-2deg);
  }
  50% {
    transform: scale(1.15) rotate(2deg);
  }
  75% {
    transform: scale(1.05) rotate(-1deg);
  }
  100% {
    transform: scale(1) rotate(0);
  }
}

.reading-mode-container .celebrate {
  animation: celebrate 500ms ease;
}

/* ---- Toast notification (reading-mode specific) ---- */
@keyframes rmToastIn {
  from {
    opacity: 0;
    transform: translateY(100%) translateX(-50%);
  }
  to {
    opacity: 1;
    transform: translateY(0) translateX(-50%);
  }
}

@keyframes rmToastOut {
  from {
    opacity: 1;
    transform: translateY(0) translateX(-50%);
  }
  to {
    opacity: 0;
    transform: translateY(100%) translateX(-50%);
  }
}

.reading-mode-container .rm-toast {
  position: fixed;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-light);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-toast);
  animation: rmToastIn 300ms ease forwards;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.reading-mode-container .rm-toast.hiding {
  animation: rmToastOut 300ms ease forwards;
}

.reading-mode-container .rm-toast-success {
  background: var(--color-secondary);
  color: white;
  border-color: var(--color-secondary);
}

.reading-mode-container .rm-toast-error {
  background: var(--color-error);
  color: white;
  border-color: var(--color-error);
}

/* ---- Character learned flash ---- */
@keyframes learnedFlash {
  0% {
    background-color: var(--color-char-unknown-bg);
    color: var(--color-char-unknown);
  }
  50% {
    background-color: var(--color-secondary-lighter);
    color: var(--color-secondary);
    transform: scale(1.1);
  }
  100% {
    background-color: transparent;
    color: var(--color-char-known);
    transform: scale(1);
  }
}

.reading-mode-container .char-learned-flash {
  animation: learnedFlash 600ms ease forwards;
}

/* ---- Glassmorphism glow accent (optional enhancement) ---- */
@keyframes glassGlow {
  0%, 100% {
    box-shadow: var(--shadow-card);
  }
  50% {
    box-shadow: var(--shadow-card-hover), 0 0 30px rgba(14, 165, 233, 0.08);
  }
}

/* ---- Hero glow ---- */
@keyframes heroGlow {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(5%, 5%) scale(1.05); }
}

/* ---- Fade in up (for generated section) ---- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---- Reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  .reading-mode-container *,
  .reading-mode-container *::before,
  .reading-mode-container *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}