/* ============================================================
   Tianji (天机) — Premium Chinese Metaphysics Web App
   Complete Design System — Traditional Chinese Aesthetics
   ============================================================
   Table of Contents:
   1.  Font Face & Imports
   2.  CSS Custom Properties (Design Tokens)
   3.  Reset & Base
   4.  Typography
   5.  Scrollbar
   6.  Background Canvas & Decorations
   7.  Layout — Shell & Container
   8.  Hero Section
   9.  Header & Navigation
   10. Tab Navigation (Desktop + Mobile Bottom Nav)
   11. Cards with Corner Ornaments
   12. Forms & Inputs (Premium)
   13. Gender Icon Buttons
   14. Buttons
   15. BaZi Four Pillars Grid
   16. Hexagram SVG Display
   17. Zi Wei Dou Shu 12-Palace Grid
   18. Five Elements Radar Chart
   19. Luck Pillars Timeline (Draggable)
   20. Flow Years
   21. Loading & Taiji Spinner
   22. Toast Notifications
   23. Modal / Overlay
   24. Chinese Decorative Elements
   25. Footer
   26. Stagger Animations
   27. Utility Classes
   28. Responsive — Tablet (>=768px)
   29. Responsive — Desktop (>=1200px)
   30. Accessibility & Reduced Motion
   31. Print Styles
   ============================================================ */


/* ============================================================
   1. Font Face & Imports
   ============================================================ */
@font-face {
  font-family: 'Noto Serif SC';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: local('Noto Serif SC SemiBold'), local('NotoSerifSC-SemiBold'),
       local('Noto Serif CJK SC SemiBold'), local('Source Han Serif SC SemiBold');
}
@font-face {
  font-family: 'Noto Serif SC';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: local('Noto Serif SC Bold'), local('NotoSerifSC-Bold'),
       local('Noto Serif CJK SC Bold'), local('Source Han Serif SC Bold');
}


/* ============================================================
   2. CSS Custom Properties (Design Tokens)
   ============================================================ */
:root {
  /* ---- palette ---- */
  --color-bg:            #0a0a0f;
  --color-bg-raised:     #10101a;
  --color-bg-card:       #12121a;
  --color-bg-input:      #161622;
  --color-bg-overlay:    rgba(5, 5, 10, 0.82);

  --color-surface:       #1a1a28;
  --color-border:        rgba(212, 175, 55, 0.2);
  --color-border-subtle: rgba(212, 175, 55, 0.08);
  --color-border-strong: rgba(212, 175, 55, 0.35);

  --color-text:          #e8e0d0;
  --color-text-muted:    #8a8070;
  --color-text-faint:    #5a5448;

  /* Primary gradient: cinnabar red to gold */
  --color-primary:       #c0392b;
  --color-primary-hover: #d4442a;
  --color-gold:          #d4af37;
  --color-gold-bright:   #f0c040;
  --color-gold-muted:    rgba(212, 175, 55, 0.15);

  /* Accent colors */
  --color-jade:          #7ecece;
  --color-jade-muted:    rgba(126, 206, 206, 0.15);
  --color-amber:         #f0c040;
  --color-amber-muted:   rgba(240, 192, 64, 0.12);

  /* Five elements */
  --color-wood:          #4caf50;
  --color-fire:          #f44336;
  --color-earth:         #ff9800;
  --color-metal:         #ffd600;
  --color-water:         #2196f3;

  /* Semantic */
  --color-danger:        #e04040;
  --color-success:       #3cb371;
  --color-warning:       #e0a030;
  --color-info:          #5090d0;

  /* ---- gradients ---- */
  --gradient-primary:    linear-gradient(135deg, #c0392b 0%, #d4af37 100%);
  --gradient-gold:       linear-gradient(135deg, #d4af37 0%, #f0c040 100%);
  --gradient-card:       linear-gradient(180deg, rgba(212, 175, 55, 0.04) 0%, transparent 100%);
  --gradient-hero:       radial-gradient(ellipse at 50% 0%, rgba(212, 175, 55, 0.08) 0%, transparent 60%);
  --gradient-glow:       radial-gradient(circle, rgba(212, 175, 55, 0.15) 0%, transparent 70%);

  /* ---- shadows ---- */
  --shadow-sm:  0 1px 3px rgba(0, 0, 0, 0.5);
  --shadow-md:  0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg:  0 8px 32px rgba(0, 0, 0, 0.6);
  --shadow-glow-gold:   0 0 24px rgba(212, 175, 55, 0.2);
  --shadow-glow-primary: 0 0 24px rgba(192, 57, 43, 0.2);
  --shadow-card-hover:  0 8px 32px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(212, 175, 55, 0.25);

  /* ---- radii ---- */
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  16px;
  --radius-xl:  24px;

  /* ---- spacing ---- */
  --space-xs:  4px;
  --space-sm:  8px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  40px;
  --space-2xl: 64px;
  --space-3xl: 96px;

  /* ---- typography ---- */
  --font-heading: 'Noto Serif SC', 'Source Han Serif SC', 'STSong', 'SimSun', serif;
  --font-body: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei',
               'Hiragino Sans GB', 'Noto Sans SC', sans-serif;
  --font-size-xs:   clamp(0.7rem, 0.65rem + 0.25vw, 0.75rem);
  --font-size-sm:   clamp(0.8rem, 0.75rem + 0.25vw, 0.875rem);
  --font-size-base: clamp(0.9rem, 0.85rem + 0.25vw, 1rem);
  --font-size-lg:   clamp(1rem, 0.9rem + 0.5vw, 1.2rem);
  --font-size-xl:   clamp(1.2rem, 1rem + 1vw, 1.5rem);
  --font-size-2xl:  clamp(1.5rem, 1.2rem + 1.5vw, 2rem);
  --font-size-3xl:  clamp(2rem, 1.5rem + 2.5vw, 3rem);
  --font-size-4xl:  clamp(2.5rem, 2rem + 3vw, 4rem);

  /* ---- transitions ---- */
  --transition-fast:   0.15s ease;
  --transition-base:   0.3s ease;
  --transition-slow:   0.5s ease;
  --transition-spring: 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ---- z-index scale ---- */
  --z-bg:        -1;
  --z-dropdown:  100;
  --z-sticky:    200;
  --z-bottom-nav: 300;
  --z-overlay:   500;
  --z-modal:     600;
  --z-toast:     700;
  --z-tooltip:   800;
}

/* ---- Light theme overrides ---- */
[data-theme="light"] {
  --color-bg:            #f5f0e8;
  --color-bg-raised:     #fffdf5;
  --color-bg-card:       #ffffff;
  --color-bg-input:      #f0ebe0;
  --color-bg-overlay:    rgba(0, 0, 0, 0.45);
  --color-surface:       #eae5da;
  --color-border:        rgba(180, 140, 40, 0.25);
  --color-border-subtle: rgba(180, 140, 40, 0.1);
  --color-border-strong: rgba(180, 140, 40, 0.4);
  --color-text:          #1c1810;
  --color-text-muted:    #6b6558;
  --color-text-faint:    #a09888;
  --color-primary:       #a83020;
  --color-primary-hover: #c03828;
  --gradient-primary:    linear-gradient(135deg, #a83020 0%, #b89020 100%);
  --gradient-card:       linear-gradient(180deg, rgba(180, 140, 40, 0.04) 0%, transparent 100%);
  --gradient-hero:       radial-gradient(ellipse at 50% 0%, rgba(180, 140, 40, 0.08) 0%, transparent 60%);
  --shadow-sm:  0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md:  0 4px 12px rgba(0, 0, 0, 0.10);
  --shadow-lg:  0 8px 30px rgba(0, 0, 0, 0.12);
  --shadow-glow-gold: 0 0 16px rgba(180, 140, 40, 0.12);
  --shadow-card-hover: 0 8px 24px rgba(0, 0, 0, 0.1), 0 0 0 1px rgba(180, 140, 40, 0.2);
}


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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition-base),
              color var(--transition-base);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-gold);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-gold-bright);
}

::selection {
  background: rgba(212, 175, 55, 0.25);
  color: var(--color-text);
}


/* ============================================================
   4. Typography
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.04em;
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl);  }
h4 { font-size: var(--font-size-lg);  }

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gold   { color: var(--color-gold); }
.text-jade   { color: var(--color-jade); }
.text-muted  { color: var(--color-text-muted); }
.text-faint  { color: var(--color-text-faint); }


/* ============================================================
   5. Scrollbar
   ============================================================ */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(212, 175, 55, 0.2);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(212, 175, 55, 0.35);
}

* {
  scrollbar-width: thin;
  scrollbar-color: rgba(212, 175, 55, 0.2) transparent;
}


/* ============================================================
   6. Background Canvas & Decorations
   ============================================================ */
#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: var(--z-bg);
  pointer-events: none;
  opacity: 0.4;
}

/* Ambient gradient overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: var(--z-bg);
  pointer-events: none;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(192, 57, 43, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(212, 175, 55, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(126, 206, 206, 0.02) 0%, transparent 60%);
}


/* ============================================================
   7. Layout — Shell & Container
   ============================================================ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

main.container {
  padding-top: var(--space-lg);
  padding-bottom: var(--space-3xl);
}


/* ============================================================
   8. Hero Section
   ============================================================ */
.hero {
  position: relative;
  text-align: center;
  padding: var(--space-3xl) var(--space-md) var(--space-2xl);
  background: var(--gradient-hero);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--color-gold) 50%, transparent 100%);
  opacity: 0.3;
}

.hero-taiji {
  font-size: clamp(3rem, 2rem + 5vw, 5rem);
  line-height: 1;
  margin-bottom: var(--space-md);
  animation: taiji-float 6s ease-in-out infinite;
  display: inline-block;
  filter: drop-shadow(0 0 20px rgba(212, 175, 55, 0.3));
}

@keyframes taiji-float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50%      { transform: translateY(-8px) rotate(5deg); }
}

.hero-title {
  font-family: var(--font-heading);
  font-size: var(--font-size-4xl);
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  letter-spacing: 0.15em;
  margin-bottom: var(--space-xl);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 14px 36px;
  font-family: var(--font-heading);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: #0a0a0f;
  background: var(--gradient-gold);
  border: none;
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: transform var(--transition-fast),
              box-shadow var(--transition-base);
  letter-spacing: 0.06em;
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-gold);
}

.hero-cta:active {
  transform: translateY(0);
}

/* Decorative divider below hero */
.divider-ornament {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  color: var(--color-text-faint);
  font-size: var(--font-size-xs);
  letter-spacing: 0.3em;
  opacity: 0.5;
}

.divider-ornament::before,
.divider-ornament::after {
  content: "";
  flex: 1;
  max-width: 120px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
}


/* ============================================================
   9. Header & Navigation
   ============================================================ */
.app-header {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border-subtle);
  padding: var(--space-sm) 0;
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  transition: background-color var(--transition-base),
              border-color var(--transition-base);
}

[data-theme="light"] .app-header {
  background: rgba(245, 240, 232, 0.9);
}

.app-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.logo {
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.08em;
}

.subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.1em;
  display: none;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}


/* ============================================================
   10. Tab Navigation (Desktop + Mobile Bottom Nav)
   ============================================================ */

/* --- Desktop top tabs --- */
.tab-nav {
  border-bottom: 1px solid var(--color-border-subtle);
  margin-bottom: var(--space-lg);
  position: relative;
}

.tab-nav .container {
  display: flex;
  gap: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-nav::-webkit-scrollbar,
.tab-nav .container::-webkit-scrollbar {
  height: 0;
}

.tab {
  flex-shrink: 0;
  background: none;
  border: none;
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast),
              border-color var(--transition-fast);
  white-space: nowrap;
  position: relative;
  letter-spacing: 0.06em;
}

.tab:hover {
  color: var(--color-text);
}

.tab.active {
  color: var(--color-gold);
  border-bottom-color: var(--color-gold);
  font-weight: 600;
}

.tab-panel {
  animation: panel-enter 0.4s ease both;
}

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

/* --- Mobile Bottom Nav --- */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-bottom-nav);
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--color-border);
  padding: var(--space-xs) 0;
  padding-bottom: env(safe-area-inset-bottom, 0);
}

[data-theme="light"] .bottom-nav {
  background: rgba(245, 240, 232, 0.95);
}

.bottom-nav-items {
  display: flex;
  justify-content: space-around;
  align-items: center;
  list-style: none;
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-xs) var(--space-sm);
  min-width: 64px;
  min-height: 44px;
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 10px;
  cursor: pointer;
  transition: color var(--transition-fast);
  font-family: var(--font-body);
  letter-spacing: 0.02em;
}

.bottom-nav-item .nav-icon {
  font-size: 20px;
  line-height: 1;
}

.bottom-nav-item.active {
  color: var(--color-gold);
}

.bottom-nav-item.active .nav-icon {
  filter: drop-shadow(0 0 6px rgba(212, 175, 55, 0.4));
}


/* ============================================================
   11. Cards with Corner Ornaments
   ============================================================ */
.card {
  position: relative;
  background: var(--color-bg-card);
  background-image: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base),
              transform var(--transition-base);
  overflow: hidden;
}

/* Corner ornament decorations */
.card::before,
.card::after {
  content: "";
  position: absolute;
  width: 24px;
  height: 24px;
  border-color: var(--color-gold);
  border-style: solid;
  opacity: 0.3;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.card::before {
  top: 6px;
  left: 6px;
  border-width: 1.5px 0 0 1.5px;
}

.card::after {
  bottom: 6px;
  right: 6px;
  border-width: 0 1.5px 1.5px 0;
}

.card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.card:hover::before,
.card:hover::after {
  opacity: 0.6;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.card-header h2 {
  font-size: var(--font-size-xl);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.card-body {
  color: var(--color-text);
  font-size: var(--font-size-base);
  line-height: 1.8;
}


/* ============================================================
   12. Forms & Inputs (Premium)
   ============================================================ */
.form-group {
  margin-bottom: var(--space-md);
}

.form-group label,
.form-label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
  font-weight: 500;
  letter-spacing: 0.03em;
}

.form-input,
.form-select,
select,
input[type="date"],
input[type="time"],
input[type="number"],
input[type="text"] {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              background-color var(--transition-base);
  appearance: none;
  -webkit-appearance: none;
  min-height: 44px;
}

.form-input:hover,
.form-select:hover,
select:hover,
input[type="date"]:hover,
input[type="time"]:hover,
input[type="number"]:hover,
input[type="text"]:hover {
  border-color: rgba(212, 175, 55, 0.35);
}

.form-input:focus,
.form-select:focus,
select:focus,
input[type="date"]:focus,
input[type="time"]:focus,
input[type="number"]:focus,
input[type="text"]:focus {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px var(--color-gold-muted),
              inset 0 0 12px rgba(212, 175, 55, 0.06);
}

.form-input::placeholder {
  color: var(--color-text-faint);
}

/* Select arrow (gold) */
select {
  padding-right: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23d4af37' fill='none' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  cursor: pointer;
}

/* Date/time input icon fix */
input[type="date"]::-webkit-calendar-picker-indicator,
input[type="time"]::-webkit-calendar-picker-indicator {
  filter: invert(0.7) sepia(1) saturate(2) hue-rotate(10deg);
  cursor: pointer;
}

[data-theme="light"] input[type="date"]::-webkit-calendar-picker-indicator,
[data-theme="light"] input[type="time"]::-webkit-calendar-picker-indicator {
  filter: none;
}

/* Number spinners */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  opacity: 0.4;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-jade);
  margin-top: var(--space-xs);
  margin-bottom: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-jade-muted);
  border-radius: var(--radius-sm);
  border-left: 2px solid var(--color-jade);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-danger);
  margin-top: var(--space-xs);
}


/* ============================================================
   13. Gender Icon Buttons
   ============================================================ */
.radio-group {
  display: flex;
  gap: var(--space-sm);
}

.radio-group label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 44px;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.radio-group label:hover {
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.radio-group input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  transition: all var(--transition-fast);
  position: relative;
}

.radio-group input[type="radio"]:checked {
  border-color: var(--color-gold);
  background: var(--color-gold);
  box-shadow: inset 0 0 0 3px var(--color-bg-card);
}

.radio-group input[type="radio"]:checked + span {
  color: var(--color-gold);
  font-weight: 600;
}


/* ============================================================
   14. Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
  min-height: 44px;
  letter-spacing: 0.04em;
}

.btn:active {
  transform: translateY(1px);
}

/* Primary — gradient */
.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  border: 1px solid transparent;
}

.btn-primary:hover {
  box-shadow: var(--shadow-glow-primary);
  transform: translateY(-1px);
}

/* Ghost */
.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  padding: 8px 14px;
  font-family: var(--font-body);
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
  min-height: 36px;
}

.btn-ghost:hover {
  color: var(--color-gold);
  border-color: var(--color-gold);
  background: var(--color-gold-muted);
}

/* Gold */
.btn-gold {
  background: var(--gradient-gold);
  color: #0a0a0f;
}

.btn-gold:hover {
  box-shadow: var(--shadow-glow-gold);
  transform: translateY(-1px);
}

/* Small */
.btn-sm {
  padding: 6px 14px;
  font-size: var(--font-size-xs);
  min-height: 32px;
}

/* Disabled */
.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}


/* ============================================================
   15. BaZi Four Pillars Grid (generated by app.js)
   ============================================================ */
.pillars-table {
  margin-bottom: var(--space-lg);
  overflow-x: auto;
}

.pillars-table table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 8px;
  text-align: center;
}

.pillars-table th {
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  color: var(--color-gold);
  padding: var(--space-sm);
  letter-spacing: 0.06em;
  font-weight: 600;
}

.pillars-table td {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-sm);
  vertical-align: top;
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
}

.pillars-table td:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-glow-gold);
  transform: translateY(-2px);
}

.pillars-table .stem {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  font-family: var(--font-heading);
  display: block;
}

.pillars-table .branch {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  font-family: var(--font-heading);
  display: block;
}

.pillars-table small {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.pillars-table sub {
  font-size: 0.7em;
  color: var(--color-text-faint);
}

.stems-row td {
  border-bottom: none;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.branches-row td {
  border-top: none;
  border-bottom: none;
  border-radius: 0;
}

.hidden-row td {
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-size: var(--font-size-sm);
}

/* Day Master Info */
.day-master-info {
  text-align: center;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-base);
}

/* Radar section */
.radar-section {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.radar-section h3 {
  margin-bottom: var(--space-md);
  font-size: var(--font-size-lg);
  color: var(--color-gold);
}

.radar-section canvas {
  margin: 0 auto;
  max-width: 320px;
}

/* Relationships section */
.relationships-section {
  margin-bottom: var(--space-lg);
}

.relationships-section h3 {
  color: var(--color-jade);
  margin-bottom: var(--space-sm);
}

.relationships-section ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.relationships-section li {
  padding: var(--space-xs) var(--space-md);
  background: var(--color-jade-muted);
  border: 1px solid rgba(126, 206, 206, 0.2);
  border-radius: var(--radius-xl);
  font-size: var(--font-size-sm);
  color: var(--color-jade);
}


/* ============================================================
   16. Hexagram SVG Display (generated by app.js)
   ============================================================ */
.hex-header {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
  text-align: center;
}

.hex-primary,
.hex-changed {
  padding: var(--space-lg);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  min-width: 200px;
  transition: all var(--transition-fast);
}

.hex-primary:hover,
.hex-changed:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-glow-gold);
}

.hex-symbol {
  font-size: clamp(3rem, 2.5rem + 3vw, 5rem);
  line-height: 1;
  margin: var(--space-sm) 0;
  filter: drop-shadow(0 0 8px rgba(212, 175, 55, 0.3));
}

.hex-name {
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  color: var(--color-gold);
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.hex-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-style: italic;
}

.hex-arrow {
  font-size: var(--font-size-2xl);
  color: var(--color-gold);
  align-self: center;
  padding: var(--space-md);
}

/* SVG hexagram visual */
.hex-visual {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}

.hex-svg-wrap {
  text-align: center;
}

.hex-svg-wrap h4 {
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-sm);
}

.hex-svg-wrap svg {
  margin: 0 auto;
}

/* Moving line styling */
.moving-line {
  filter: drop-shadow(0 0 4px rgba(244, 67, 54, 0.5));
}

.hex-moving {
  text-align: center;
  padding: var(--space-md);
  background: var(--color-bg-raised);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.hex-moving strong {
  color: var(--color-primary);
}

/* Lines detail table */
.hex-lines-table {
  overflow-x: auto;
}

.hex-lines-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.hex-lines-table th {
  font-family: var(--font-heading);
  font-size: var(--font-size-xs);
  color: var(--color-gold);
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  letter-spacing: 0.04em;
}

.hex-lines-table td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border-subtle);
  color: var(--color-text-muted);
}

.hex-lines-table .moving-row {
  background: rgba(244, 67, 54, 0.08);
}

.hex-lines-table .moving-row td {
  color: var(--color-fire);
  font-weight: 600;
}


/* ============================================================
   17. Zi Wei Dou Shu 12-Palace Grid
   ============================================================ */
.ziwei-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(4, auto);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.ziwei-cell {
  background: var(--color-bg-card);
  padding: var(--space-sm);
  min-height: 85px;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-fast),
              box-shadow var(--transition-fast);
  cursor: default;
}

.ziwei-cell:hover {
  background: var(--color-bg-raised);
  box-shadow: inset 0 0 0 1px var(--color-gold);
}

.zw-branch {
  font-family: var(--font-heading);
  font-size: var(--font-size-xs);
  color: var(--color-text-faint);
  margin-bottom: 2px;
}

.zw-palace-name {
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-gold);
  margin-bottom: var(--space-xs);
}

.zw-stars {
  font-size: var(--font-size-xs);
  line-height: 1.6;
}

.zw-star {
  display: inline-block;
  padding: 1px 4px;
  margin: 1px;
  background: var(--color-gold-muted);
  border-radius: 3px;
  color: var(--color-gold-bright);
  font-weight: 500;
}

.zw-no-star {
  color: var(--color-text-faint);
  font-size: var(--font-size-xs);
}

/* Center info cell */
.ziwei-center {
  grid-column: 2 / 4;
  grid-row: 2 / 4;
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-lg);
  min-height: auto;
}

.ziwei-center h2 {
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-sm);
}

.ziwei-center p {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}


/* ============================================================
   18. Five Elements Radar Chart (Canvas)
   ============================================================ */
#five-elements-chart,
#radar-canvas {
  display: block;
  margin: 0 auto;
  max-width: 100%;
}


/* ============================================================
   19. Luck Pillars Timeline (Draggable)
   ============================================================ */
.luck-pillars-section {
  margin-bottom: var(--space-lg);
}

.luck-pillars-section h3 {
  color: var(--color-gold);
  margin-bottom: var(--space-md);
}

.luck-pillars-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: var(--space-sm);
  cursor: grab;
  position: relative;
}

.luck-pillars-scroll:active {
  cursor: grabbing;
}

.luck-pillars-scroll::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
  pointer-events: none;
  z-index: 0;
}

.luck-pillars-track {
  display: flex;
  gap: 0;
  min-width: max-content;
  position: relative;
  z-index: 1;
}

.luck-pillar-card {
  flex-shrink: 0;
  width: 80px;
  text-align: center;
  padding: var(--space-md) var(--space-sm);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-right: var(--space-xs);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.luck-pillar-card:hover {
  border-color: var(--color-gold);
  box-shadow: var(--shadow-glow-gold);
  transform: translateY(-4px);
}

.luck-pillar-card.active {
  border-color: var(--color-gold);
  background: var(--color-gold-muted);
  box-shadow: var(--shadow-glow-gold);
}

.lp-age {
  font-size: var(--font-size-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-xs);
}

.lp-stem {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 700;
  line-height: 1.2;
}

.lp-branch {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-xs);
}


/* ============================================================
   20. Flow Years
   ============================================================ */
.flow-years-section {
  margin-bottom: var(--space-lg);
}

.flow-years-section h3 {
  color: var(--color-jade);
  margin-bottom: var(--space-md);
}

.flow-years-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-sm);
}

.flow-year-cell {
  text-align: center;
  padding: var(--space-sm);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.flow-year-cell:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.fy-year {
  font-size: var(--font-size-xs);
  color: var(--color-text-faint);
}

.fy-gz {
  font-family: var(--font-heading);
  font-size: var(--font-size-base);
  font-weight: 600;
}


/* ============================================================
   21. Loading & Taiji Spinner
   ============================================================ */

/* Taiji rotation loading */
.taiji-spinner {
  display: inline-block;
  font-size: 2rem;
  animation: taiji-spin 1.2s linear infinite;
  filter: drop-shadow(0 0 8px rgba(212, 175, 55, 0.3));
}

@keyframes taiji-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.spinner-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-bg-overlay);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: var(--z-overlay);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.spinner-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* Fallback dual-ring spinner */
.spinner {
  position: relative;
  width: 48px;
  height: 48px;
}

.spinner::before,
.spinner::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 3px solid transparent;
}

.spinner::before {
  border-top-color: var(--color-primary);
  animation: spin 1s linear infinite;
}

.spinner::after {
  border-bottom-color: var(--color-gold);
  animation: spin 1s linear infinite reverse;
  inset: 6px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}


/* ============================================================
   22. Toast Notifications
   ============================================================ */
.toast {
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  min-width: 200px;
  max-width: 360px;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  text-align: center;
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: var(--z-toast);
  backdrop-filter: blur(12px);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}


/* ============================================================
   23. Modal / Overlay (Share)
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-bg-overlay);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  backdrop-filter: blur(8px);
}

.modal {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  animation: modal-enter 0.3s ease;
}

@keyframes modal-enter {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border-subtle);
}

.modal-header h3 {
  font-size: var(--font-size-lg);
  color: var(--color-gold);
}

.modal-close {
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  color: var(--color-text-faint);
  cursor: pointer;
  padding: var(--space-xs);
  line-height: 1;
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--color-gold);
}

.modal-body {
  padding: var(--space-lg);
}

.share-url {
  display: flex;
  gap: var(--space-sm);
}

.share-url input {
  flex: 1;
}


/* ============================================================
   24. Chinese Decorative Elements
   ============================================================ */

/* Traditional pattern divider */
.divider-pattern {
  border: none;
  height: 1px;
  margin: var(--space-xl) 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--color-border) 15%,
    var(--color-gold) 50%,
    var(--color-border) 85%,
    transparent 100%
  );
  position: relative;
  opacity: 0.5;
}

.divider-pattern::after {
  content: "◇";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-bg);
  padding: 0 var(--space-md);
  color: var(--color-gold);
  font-size: var(--font-size-xs);
}

/* Red seal stamp */
.seal-stamp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border: 2px solid var(--color-primary);
  border-radius: 4px;
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 700;
  transform: rotate(-5deg);
  opacity: 0.7;
  user-select: none;
}

/* Privacy notice */
.privacy-notice {
  text-align: center;
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  font-size: var(--font-size-xs);
  color: var(--color-text-faint);
  line-height: 1.6;
}

.privacy-notice h3 {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
  letter-spacing: 0;
}


/* ============================================================
   25. Footer
   ============================================================ */
.app-footer {
  background: var(--color-bg-raised);
  border-top: 1px solid var(--color-border-subtle);
  padding: var(--space-xl) 0 var(--space-lg);
  margin-top: auto;
  transition: background-color var(--transition-base),
              border-color var(--transition-base);
}

.app-footer .container {
  text-align: center;
}

.footer-brand {
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.04em;
}

.footer-links {
  font-size: var(--font-size-xs);
  color: var(--color-text-faint);
}

.footer-links a {
  color: var(--color-text-faint);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-gold);
}


/* ============================================================
   26. Stagger Animations
   ============================================================ */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scale-in {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Spring-like card entrance */
@keyframes spring-up {
  0%   { opacity: 0; transform: translateY(40px); }
  60%  { opacity: 1; transform: translateY(-6px); }
  80%  { transform: translateY(2px); }
  100% { transform: translateY(0); }
}

.animate-in {
  animation: fade-up 0.5s ease both;
}

.animate-spring {
  animation: spring-up 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

/* Stagger delays for children */
.stagger > *:nth-child(1) { animation-delay: 0s; }
.stagger > *:nth-child(2) { animation-delay: 0.08s; }
.stagger > *:nth-child(3) { animation-delay: 0.16s; }
.stagger > *:nth-child(4) { animation-delay: 0.24s; }
.stagger > *:nth-child(5) { animation-delay: 0.32s; }
.stagger > *:nth-child(6) { animation-delay: 0.40s; }

/* Calculation spinning animation for symbols */
@keyframes symbol-spin {
  0%   { transform: rotate(0deg) scale(1); }
  50%  { transform: rotate(180deg) scale(1.1); }
  100% { transform: rotate(360deg) scale(1); }
}

.calculating .hex-symbol,
.calculating .taiji-spinner {
  animation: symbol-spin 0.8s ease-in-out;
}

/* Radar chart expand animation */
@keyframes radar-expand {
  from { transform: scale(0); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}


/* ============================================================
   27. Utility Classes
   ============================================================ */
.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;
}

.hidden   { display: none !important; }
.flex     { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.text-center { text-align: center; }
.text-right  { text-align: right; }
.mt-sm  { margin-top: var(--space-sm); }
.mt-md  { margin-top: var(--space-md); }
.mt-lg  { margin-top: var(--space-lg); }
.mb-sm  { margin-bottom: var(--space-sm); }
.mb-md  { margin-bottom: var(--space-md); }
.mb-lg  { margin-bottom: var(--space-lg); }
.p-sm   { padding: var(--space-sm); }
.p-md   { padding: var(--space-md); }
.p-lg   { padding: var(--space-lg); }
.w-full { width: 100%; }
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: var(--space-2xl) var(--space-md);
  color: var(--color-text-faint);
  font-size: var(--font-size-sm);
}


/* ============================================================
   28. Responsive — Tablet (>= 768px)
   ============================================================ */
@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-lg);
  }

  .subtitle {
    display: block;
  }

  .form-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-row--3col {
    grid-template-columns: repeat(3, 1fr);
  }

  .pillars-table td {
    padding: var(--space-lg) var(--space-md);
  }

  .pillars-table .stem,
  .pillars-table .branch {
    font-size: var(--font-size-3xl);
  }

  .luck-pillar-card {
    width: 90px;
  }

  .ziwei-cell {
    min-height: 100px;
    padding: var(--space-md);
  }

  .flow-years-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .hex-primary,
  .hex-changed {
    min-width: 240px;
  }
}


/* ============================================================
   29. Responsive — Desktop (>= 1200px)
   ============================================================ */
@media (min-width: 1200px) {
  .form-row {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }

  .pillars-table {
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
  }

  .pillars-table td {
    padding: var(--space-xl) var(--space-lg);
  }

  .luck-pillar-card {
    width: 100px;
  }

  .ziwei-cell {
    min-height: 120px;
  }

  .flow-years-grid {
    grid-template-columns: repeat(10, 1fr);
  }
}


/* ============================================================
   30. Accessibility & Reduced Motion
   ============================================================ */

/* Focus outlines */
:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

.btn:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--color-gold-muted);
}

.tab:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: -2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* Reduced motion */
@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;
  }

  .hero-taiji {
    animation: none;
  }

  .taiji-spinner {
    animation: none;
  }

  .card:hover {
    transform: none;
  }
}

/* High contrast */
@media (prefers-contrast: high) {
  :root {
    --color-border: rgba(212, 175, 55, 0.4);
    --color-text-muted: #b0a890;
    --color-text-faint: #908878;
  }
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  background: var(--color-gold);
  color: #0a0a0f;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  z-index: 9999;
  font-size: var(--font-size-sm);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-sm);
}


/* ============================================================
   31. Mobile — Bottom Nav visible, top tabs hidden
   ============================================================ */
@media (max-width: 767px) {
  .tab-nav {
    display: none;
  }

  .bottom-nav {
    display: block;
  }

  main.container {
    padding-bottom: calc(var(--space-3xl) + 60px);
  }

  .hero {
    padding: var(--space-2xl) var(--space-md) var(--space-xl);
  }

  .pillars-table table {
    border-spacing: 4px;
  }

  .pillars-table .stem,
  .pillars-table .branch {
    font-size: var(--font-size-xl);
  }

  .ziwei-cell {
    min-height: 70px;
    padding: var(--space-xs);
    font-size: var(--font-size-xs);
  }

  .zw-palace-name {
    font-size: var(--font-size-xs);
  }

  .zw-star {
    font-size: 10px;
    padding: 0 2px;
  }

  .flow-years-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .luck-pillar-card {
    width: 70px;
    padding: var(--space-sm) var(--space-xs);
  }

  .hex-header {
    flex-direction: column;
    align-items: center;
  }

  .hex-arrow {
    transform: rotate(90deg);
    padding: var(--space-sm);
  }
}


/* ============================================================
   32. Print Styles
   ============================================================ */
@media print {
  *,
  *::before,
  *::after {
    background: transparent !important;
    color: #000 !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  body {
    font-size: 11pt;
    line-height: 1.5;
  }

  body::before,
  #bg-canvas,
  .app-header,
  .app-footer,
  .tab-nav,
  .bottom-nav,
  .btn,
  .toast,
  .spinner-overlay,
  .modal-overlay,
  .skip-link,
  .hero-cta,
  .divider-ornament {
    display: none !important;
  }

  .tab-panel {
    display: block !important;
    page-break-inside: avoid;
  }

  .card {
    border: 1px solid #ccc !important;
    page-break-inside: avoid;
    padding: 12pt;
  }

  .card::before,
  .card::after {
    display: none !important;
  }

  .pillars-table td {
    border: 1px solid #999 !important;
    padding: 8pt;
  }

  .ziwei-grid {
    border: 1px solid #999 !important;
  }

  .ziwei-cell {
    border: 1px solid #ccc !important;
  }

  .container {
    max-width: 100%;
    padding: 0;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 9pt;
    color: #666 !important;
  }
}