/**
 * SETO AI Workshop 2026
 * 岡山県立瀬戸高等学校 職員研修「生成AIの校務利用と働き方改革」
 * awwwards-level Design System
 * Material Design Base + Sophisticated Minimalism
 */

/* ============================================
   CSS Variables - Design Tokens
   ============================================ */
:root {
  /* Brand Colors - Hibarigaoka Gakuen えんじ */
  --brand-primary: #3f6fc7;
  --brand-primary-dark: #2a55a3;
  --brand-primary-light: #6b93d9;

  /* Neutrals - Sophisticated palette */
  --ink-900: #0A0F1C;
  --ink-800: #151B2C;
  --ink-700: #1E2640;
  --ink-600: #2D3A56;
  --ink-500: #445371;
  --ink-400: #6B7A99;
  --ink-300: #94A3BB;
  --ink-200: #C7D1E0;
  --ink-100: #E8EDF5;
  --ink-50: #F4F7FB;

  /* Paper tones */
  --paper: #FEFEFE;
  --paper-warm: #FDFCFA;
  --paper-cool: #F8FAFC;

  /* Accent Colors */
  --accent-gold: #D4A855;
  --accent-teal: #2B7A78;
  --accent-violet: #8B5CF6;
  --accent-coral: #C23433;

  /* Semantic Colors */
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  --info: #3B82F6;

  /* Typography Scale */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  --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;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;

  --leading-tight: 1.2;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;

  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;

  /* Spacing Scale */
  --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;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Shadows - Layered depth system */
  --shadow-xs: 0 1px 2px rgba(10, 15, 28, 0.04);
  --shadow-sm: 0 1px 3px rgba(10, 15, 28, 0.06), 0 1px 2px rgba(10, 15, 28, 0.04);
  --shadow-md: 0 4px 6px rgba(10, 15, 28, 0.05), 0 2px 4px rgba(10, 15, 28, 0.04);
  --shadow-lg: 0 10px 15px rgba(10, 15, 28, 0.06), 0 4px 6px rgba(10, 15, 28, 0.04);
  --shadow-xl: 0 20px 25px rgba(10, 15, 28, 0.08), 0 8px 10px rgba(10, 15, 28, 0.04);
  --shadow-2xl: 0 25px 50px rgba(10, 15, 28, 0.15);
  --shadow-glow: 0 0 40px rgba(63, 111, 199, 0.15);

  /* Transitions */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-expo: cubic-bezier(0.7, 0, 0.84, 0);
  --ease-in-out-expo: cubic-bezier(0.87, 0, 0.13, 1);
  --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);

  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-slower: 700ms;

  /* Z-index scale */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-drawer: 300;
  --z-modal: 400;
  --z-overlay: 500;
  --z-toast: 600;
  --z-transition: 9999;

  /* Light theme tokens */
  --bg-primary: var(--paper);
  --bg-secondary: var(--ink-50);
  --bg-tertiary: var(--ink-100);
  --bg-card: var(--paper);
  --bg-elevated: var(--paper);

  --text-primary: var(--ink-900);
  --text-secondary: var(--ink-600);
  --text-muted: var(--ink-400);
  --text-inverted: var(--paper);

  --border-color: var(--ink-200);
  --border-subtle: var(--ink-100);

  --color-primary: var(--brand-primary);
  --color-primary-dark: var(--brand-primary-dark);
}

/* Dark theme */
[data-theme="dark"] {
  --bg-primary: var(--ink-900);
  --bg-secondary: var(--ink-800);
  --bg-tertiary: var(--ink-700);
  --bg-card: var(--ink-800);
  --bg-elevated: var(--ink-700);

  --text-primary: var(--ink-50);
  --text-secondary: var(--ink-300);
  --text-muted: var(--ink-400);
  --text-inverted: var(--ink-900);

  --border-color: var(--ink-600);
  --border-subtle: var(--ink-700);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.35);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
  min-height: 100vh;
}

body.no-scroll {
  overflow: hidden;
}

::selection {
  background: var(--brand-primary);
  color: var(--paper);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* ============================================
   Page Transition Overlay
   ============================================ */
.page-transition-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-transition);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-transition-overlay::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--ink-900);
  transform: scaleY(1);
  transform-origin: bottom;
  transition: transform 0.8s var(--ease-in-out-expo);
}

.page-transition-overlay .transition-text {
  position: relative;
  z-index: 2;
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  color: var(--paper);
  opacity: 1;
  transition: opacity 0.3s ease;
}

/* Page loaded - reveal animation */
.page-transition-overlay.loaded::before {
  transform: scaleY(0);
  transform-origin: top;
}

.page-transition-overlay.loaded .transition-text {
  opacity: 0;
}

/* Page exiting - cover animation */
.page-transition-overlay.exiting::before {
  transform: scaleY(1);
  transform-origin: bottom;
}

.page-transition-overlay.exiting .transition-text {
  opacity: 1;
  animation: fadeInUp 0.4s var(--ease-out-expo) 0.2s forwards;
}

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

/* ============================================
   Navigation
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  padding: var(--space-4) 0;
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.nav::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--bg-primary);
  opacity: 0;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: opacity var(--duration-normal) ease;
  border-bottom: 1px solid transparent;
}

.nav.scrolled::before {
  opacity: 0.95;
  border-bottom-color: var(--border-subtle);
}

.nav-inner {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-primary);
  transition: opacity var(--duration-fast) ease;
}

.nav-logo:hover {
  opacity: 0.7;
}

.nav-logo-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--brand-primary);
  color: var(--paper);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  position: relative;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: var(--tracking-wide);
  transition: color var(--duration-fast) ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--brand-primary);
  transition: width var(--duration-normal) var(--ease-out-expo);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Dropdown Menu */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-trigger {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: var(--tracking-wide);
  cursor: pointer;
  transition: color var(--duration-fast) ease;
}

.nav-dropdown-trigger:hover {
  color: var(--text-primary);
}

.nav-dropdown-trigger .material-symbols-outlined {
  font-size: 18px;
  transition: transform var(--duration-fast) ease;
}

.nav-dropdown:hover .nav-dropdown-trigger .material-symbols-outlined {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 220px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-fast) var(--ease-out-expo);
  z-index: var(--z-dropdown);
}

.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: all var(--duration-fast) ease;
}

.nav-dropdown-item:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.nav-dropdown-item .material-symbols-outlined {
  font-size: 20px;
  color: var(--color-primary);
}

.nav-dropdown-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: var(--space-2) 0;
}

.nav-dropdown-label {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  transition: all var(--duration-fast) ease;
}

.theme-toggle:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-primary);
}

@media (max-width: 1024px) {
  .nav-menu { display: none; }
  .nav-toggle { display: flex; }
}

/* ============================================
   Drawer Menu
   ============================================ */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  z-index: var(--z-drawer);
  background: rgba(10, 15, 28, 0.5);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) ease;
}

.drawer-backdrop.show {
  opacity: 1;
  visibility: visible;
}

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: calc(var(--z-drawer) + 1);
  width: 320px;
  max-width: 85vw;
  background: var(--bg-primary);
  transform: translateX(100%);
  transition: transform var(--duration-normal) var(--ease-out-expo);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-2xl);
}

.drawer.open {
  transform: translateX(0);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
}

.drawer-title {
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-muted);
}

.drawer-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--duration-fast) ease;
}

.drawer-close:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.drawer-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4) var(--space-4);
}

.drawer-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: all var(--duration-fast) ease;
}

.drawer-link:hover,
.drawer-link.active {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.drawer-link.active {
  color: var(--brand-primary);
}

.drawer-link .material-symbols-outlined {
  font-size: 20px;
}

.drawer-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: var(--space-3) 0;
}

.drawer-section-label {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--space-32) var(--space-8);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 40%, rgba(63, 111, 199, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(139, 92, 246, 0.05) 0%, transparent 50%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.5;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 20%, transparent 70%);
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: float 20s ease-in-out infinite;
}

.hero-orb-1 {
  width: 400px;
  height: 400px;
  top: 10%;
  left: 10%;
  background: var(--brand-primary);
  animation-delay: 0s;
}

.hero-orb-2 {
  width: 300px;
  height: 300px;
  top: 60%;
  right: 15%;
  background: var(--accent-violet);
  animation-delay: -7s;
}

.hero-orb-3 {
  width: 200px;
  height: 200px;
  bottom: 20%;
  left: 30%;
  background: var(--accent-gold);
  animation-delay: -14s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(20px, -30px) scale(1.05); }
  50% { transform: translate(-15px, 20px) scale(0.95); }
  75% { transform: translate(25px, 15px) scale(1.02); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1000px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.2); }
}

.hero-title {
  margin-bottom: var(--space-6);
}

.hero-title-main {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(var(--text-4xl), 8vw, var(--text-7xl));
  font-weight: 600;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}

.hero-title-sub {
  display: block;
  font-size: clamp(var(--text-lg), 2.5vw, var(--text-2xl));
  font-weight: 400;
  color: var(--text-secondary);
  margin-top: var(--space-3);
  letter-spacing: var(--tracking-normal);
}

.hero-description {
  max-width: 600px;
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.hero-scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-muted);
}

.hero-scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0%, 100% { transform: scaleY(1); opacity: 0.5; }
  50% { transform: scaleY(0.6); opacity: 1; }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out-expo);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--brand-primary);
  color: var(--paper);
  box-shadow: 0 4px 14px rgba(63, 111, 199, 0.3);
}

.btn-primary:hover {
  background: var(--brand-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(63, 111, 199, 0.35);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--text-muted);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
}

.btn-ghost:hover {
  background: var(--bg-secondary);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

.btn-xl {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-lg);
}

.btn-icon {
  font-size: 18px;
}

/* Gem link button */
.gem-link-btn,
.btn-gem {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--accent-violet) 100%);
  color: var(--paper);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out-expo);
  box-shadow: 0 4px 14px rgba(63, 111, 199, 0.25);
}

.gem-link-btn:hover,
.btn-gem:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(63, 111, 199, 0.35);
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--space-8);
}

.container-content {
  max-width: 1200px;
}

.container-text {
  max-width: 720px;
}

.section {
  padding: var(--space-24) var(--space-8);
}

.section-header {
  max-width: 800px;
  margin-bottom: var(--space-12);
}

.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--brand-primary);
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl));
  font-weight: 600;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.section-description {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
}

/* ============================================
   Page Hero
   ============================================ */
.page-hero {
  padding: calc(var(--space-32) + 60px) var(--space-8) var(--space-16);
  background: linear-gradient(to bottom, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.page-hero-content {
  max-width: 900px;
}

.page-badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: var(--brand-primary);
  color: var(--paper);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-4);
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(var(--text-3xl), 6vw, var(--text-5xl));
  font-weight: 600;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.page-description {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
}

.page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.page-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.page-meta-item .material-symbols-outlined {
  font-size: 18px;
  color: var(--brand-primary);
}

/* ============================================
   Cards
   ============================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.card:hover {
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

/* Feature Cards */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.feature-card:hover {
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: translateY(-4px);
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-primary-light) 100%);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-5);
}

.feature-icon .material-symbols-outlined {
  font-size: 28px;
  color: var(--paper);
}

.feature-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}

.feature-description {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
}

/* Phase Cards */
.phase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-5);
}

.phase-card {
  position: relative;
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--duration-normal) var(--ease-out-expo);
  overflow: hidden;
  text-decoration: none;
}

.phase-card:hover {
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.phase-number {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 600;
  color: var(--border-color);
  line-height: 1;
}

.phase-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  transition: all var(--duration-normal) ease;
}

.phase-card:hover .phase-icon {
  background: var(--brand-primary);
}

.phase-icon .material-symbols-outlined {
  font-size: 24px;
  color: var(--brand-primary);
  transition: color var(--duration-normal) ease;
}

.phase-card:hover .phase-icon .material-symbols-outlined {
  color: var(--paper);
}

.phase-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--brand-primary);
  margin-bottom: var(--space-2);
}

.phase-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.phase-description {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

.phase-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.phase-feature {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.phase-feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  background: var(--success);
  border-radius: 50%;
}

.phase-feature-icon .material-symbols-outlined {
  font-size: 12px;
  color: var(--paper);
}

/* Usage Cards */
.usage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}

.usage-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: all var(--duration-fast) ease;
}

.usage-card:hover {
  background: var(--bg-tertiary);
}

.usage-card h4 {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.usage-card p {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
}

/* ============================================
   Content Blocks
   ============================================ */
.content-block {
  margin-bottom: var(--space-12);
}

.content-block h2 {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-6);
}

.content-block h2 .material-symbols-outlined {
  font-size: 28px;
  color: var(--brand-primary);
}

/* Work Section */
.work-section {
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
}

.work-section h3 {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-6);
}

.work-section h3 .material-symbols-outlined {
  font-size: 24px;
  color: var(--brand-primary);
}

/* Step Grid */
.step-grid {
  display: grid;
  gap: var(--space-4);
}

/* Step Cards */
.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  overflow: hidden;
}

.step-card > .step-number {
  margin-bottom: var(--space-3);
}

.step-card > h4 {
  margin-bottom: var(--space-2);
}

.step-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
}

.step-number {
  width: 40px;
  height: 40px;
  min-width: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--brand-primary);
  color: var(--paper);
  font-size: var(--text-base);
  font-weight: 700;
  border-radius: var(--radius-full);
}

.step-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
}

.step-content {
  padding: var(--space-5);
}

/* ============================================
   Prompt Box
   ============================================ */
.prompt-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  cursor: pointer;
  transition: all var(--duration-fast) ease;
  position: relative;
}

.prompt-box:hover {
  border-color: var(--brand-primary);
  background: var(--bg-tertiary);
}

.prompt-box.copied {
  border-color: var(--success);
}

.prompt-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.prompt-box-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.prompt-box-hint {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.prompt-content {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
  white-space: pre-wrap;
}

.prompt-grid {
  display: grid;
  gap: var(--space-4);
}

/* ============================================
   Notice Box
   ============================================ */
.notice-box {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--brand-primary);
}

.notice-box.warning {
  border-left-color: var(--warning);
}

.notice-box.success {
  border-left-color: var(--success);
}

.notice-icon {
  font-size: 24px;
  color: var(--brand-primary);
  flex-shrink: 0;
}

.notice-box.warning .notice-icon {
  color: var(--warning);
}

.notice-box.success .notice-icon {
  color: var(--success);
}

.notice-content h4 {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.notice-content p {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
}

/* ============================================
   Column Section
   ============================================ */
.column-section {
  background: linear-gradient(135deg, rgba(63, 111, 199, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
  border: 1px solid rgba(63, 111, 199, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
}

.column-header {
  margin-bottom: var(--space-4);
}

.column-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--brand-primary);
  margin-bottom: var(--space-2);
}

.column-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
}

.column-content {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
}

.column-content p + p {
  margin-top: var(--space-4);
}

/* ============================================
   Task List
   ============================================ */
.task-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.task-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  transition: all var(--duration-fast) ease;
}

.task-item:hover {
  background: var(--bg-tertiary);
}

.task-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.task-icon .material-symbols-outlined {
  font-size: 20px;
  color: var(--brand-primary);
}

.task-content h4 {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.task-content p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* ============================================
   Magic Cards (Prompt Techniques)
   ============================================ */
.magic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
}

.magic-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: all var(--duration-fast) ease;
}

.magic-card:hover {
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-md);
}

.magic-phrase {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--brand-primary);
  margin-bottom: var(--space-3);
}

.magic-effect {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

.magic-example {
  padding: var(--space-3);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.magic-example-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: var(--space-1);
}

.category-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.category-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
}

.category-icon .material-symbols-outlined {
  font-size: 24px;
  color: var(--paper);
}

.category-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
}

.trend-badge {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  background: var(--brand-primary);
  color: var(--paper);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-sm);
  margin-left: var(--space-2);
  vertical-align: middle;
}

/* ============================================
   Page Navigation
   ============================================ */
.page-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-color);
}

.page-nav a,
.page-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  text-decoration: none;
  transition: background var(--duration-fast) ease, color var(--duration-fast) ease;
}

.page-nav a:hover,
.page-nav-link:hover {
  background: var(--bg-secondary);
  color: var(--brand-primary);
}

.page-nav a .material-symbols-outlined,
.page-nav-link .material-symbols-outlined {
  font-size: 24px;
  flex-shrink: 0;
}

.page-nav a:last-child,
.page-nav-next {
  text-align: right;
  justify-content: flex-end;
}

.page-nav-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-1);
}

.page-nav-title {
  display: block;
  font-size: var(--text-lg);
  font-weight: 600;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  padding: var(--space-12) var(--space-8);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
}

.footer-bottom {
  text-align: center;
}

.footer-copyright {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* ============================================
   Toast
   ============================================ */
.toast {
  position: fixed;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: var(--ink-900);
  color: var(--paper);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-out-expo);
  z-index: var(--z-toast);
}

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

.toast .material-symbols-outlined {
  font-size: 18px;
  color: var(--success);
}

/* ============================================
   Scroll Animations
   ============================================ */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s var(--ease-out-expo);
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

[data-animate="fade-up"] {
  transform: translateY(40px);
}

[data-animate="fade-in"] {
  transform: translateY(0);
}

/* ============================================
   Agenda Table
   ============================================ */
.agenda-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--space-6);
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.agenda-table thead {
  background: var(--ink-900);
  color: var(--paper);
}

.agenda-table th {
  padding: var(--space-4) var(--space-5);
  text-align: left;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
}

.agenda-table td {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.agenda-table tbody tr:hover {
  background: var(--bg-secondary);
}

.agenda-table tbody tr:last-child td {
  border-bottom: none;
}

/* ============================================
   Gem Cards
   ============================================ */
.gem-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  margin-bottom: var(--space-6);
}

.gem-card-header {
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--accent-violet) 100%);
  padding: var(--space-4) var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.gem-card-info {
  flex: 1;
  min-width: 200px;
}

.gem-card-name {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--paper);
  margin-bottom: var(--space-1);
}

.gem-card-desc {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.9);
}

.gem-card-content {
  padding: var(--space-5);
}

/* Dialogue sample */
.dialogue-sample {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-subtle);
}

.dialogue-sample-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}

.dialogue-turn {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.dialogue-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: var(--text-xs);
  font-weight: 600;
}

.dialogue-avatar.user {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

.dialogue-avatar.gem {
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--accent-violet) 100%);
  color: var(--paper);
}

.dialogue-bubble {
  flex: 1;
  background: var(--bg-secondary);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
}

.dialogue-bubble.gem {
  background: linear-gradient(135deg, rgba(63, 111, 199, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
  border: 1px solid rgba(63, 111, 199, 0.15);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  .hero {
    min-height: auto;
    padding: var(--space-24) var(--space-6);
  }

  .section {
    padding: var(--space-16) var(--space-6);
  }

  .container {
    padding: 0 var(--space-6);
  }

  .nav-inner {
    padding: 0 var(--space-6);
  }
}

@media (max-width: 768px) {
  .hero {
    padding: var(--space-20) var(--space-5);
  }

  .hero-title-main {
    font-size: var(--text-3xl);
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn-lg, .btn-xl {
    width: 100%;
    justify-content: center;
  }

  .section {
    padding: var(--space-12) var(--space-5);
  }

  .section-header {
    margin-bottom: var(--space-8);
  }

  .section-title {
    font-size: var(--text-2xl);
  }

  .page-hero {
    padding: calc(var(--space-24) + 60px) var(--space-5) var(--space-12);
  }

  .page-title {
    font-size: var(--text-2xl);
  }

  .feature-grid,
  .phase-grid,
  .usage-grid,
  .magic-grid {
    grid-template-columns: 1fr;
  }

  .page-nav {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .page-nav-next {
    text-align: left;
    justify-content: flex-start;
  }

  .work-section {
    padding: var(--space-5);
  }

  .gem-card-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  :root {
    font-size: 14px;
  }

  .nav-inner {
    padding: 0 var(--space-4);
  }

  .hero,
  .section,
  .page-hero {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  .container {
    padding: 0 var(--space-4);
  }
}

/* ============================================
   Copyable Elements - iframe対応
   ============================================ */
.copyable {
  position: relative;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.copyable:hover {
  background-color: rgba(59, 130, 246, 0.08);
}

.copyable::after {
  content: 'クリックでコピー';
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 10px;
  color: var(--ink-400);
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
  white-space: nowrap;
}

.copyable:hover::after {
  opacity: 1;
}

.copyable.copied::after {
  content: 'コピーしました!';
  color: var(--success);
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 11px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  margin-left: 8px;
  vertical-align: middle;
}

.copy-btn:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.copy-btn.copied {
  background: var(--success);
  color: white;
  border-color: var(--success);
}

.copy-btn .material-symbols-outlined {
  font-size: 14px;
}

/* Prompt example with copy button */
.prompt-copyable {
  position: relative;
  padding-right: 80px;
}

.prompt-copyable .copy-btn {
  position: absolute;
  right: 8px;
  top: 8px;
}

/* ============================================
   Tabs (from chiben)
   ============================================ */
.tabs {
  margin: 1.5rem 0;
}

.tab-list {
  display: flex;
  gap: 0.5rem;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 1.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-btn {
  padding: 0.875rem 1.5rem;
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--duration-fast) ease;
  white-space: nowrap;
  margin-bottom: -2px;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.tab-btn.active {
  color: var(--brand-primary);
  border-bottom-color: var(--brand-primary);
}

.tab-nav,
.tab-list {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
}

.tab-panel {
  display: none;
  animation: tabFadeIn 0.3s ease;
}

.tab-panel.active {
  display: block;
}

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

/* ============================================
   Accordion
   ============================================ */
.accordion {
  margin: 1.5rem 0;
}

.accordion-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: all var(--duration-normal) ease;
}

.accordion-item:hover {
  border-color: var(--ink-300);
}

.accordion-header,
.accordion-trigger {
  width: 100%;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  transition: all var(--duration-fast) ease;
}

.accordion-header:hover,
.accordion-trigger:hover {
  background: var(--bg-secondary);
}

.accordion-icon {
  font-size: 1.25rem;
  color: var(--text-muted);
  transition: transform var(--duration-normal) ease;
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-normal) ease;
}

.accordion-item.active .accordion-content {
  max-height: 2000px;
}

.accordion-item.active .accordion-icon,
.accordion-trigger[aria-expanded="true"] .accordion-icon {
  transform: rotate(180deg);
}

.accordion-body {
  padding: 0 1.5rem 1.5rem;
  color: var(--text-secondary);
}

/* ============================================
   Carousel / Slider
   ============================================ */
.carousel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.carousel-track {
  display: flex;
  transition: transform 0.5s var(--ease-out-expo);
}

.carousel-slide {
  flex: 0 0 100%;
  min-width: 100%;
}

.carousel-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--paper);
  border: none;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  transition: all var(--duration-fast) ease;
  z-index: 10;
}

.carousel-nav:hover {
  background: var(--brand-primary);
  color: var(--paper);
  transform: translateY(-50%) scale(1.1);
}

.carousel-nav.prev { left: 1rem; }
.carousel-nav.next { right: 1rem; }

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1rem;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ink-300);
  border: none;
  cursor: pointer;
  transition: all var(--duration-fast) ease;
}

.carousel-dot.active {
  background: var(--brand-primary);
  transform: scale(1.2);
}

/* ============================================
   Count Up
   ============================================ */
.count-up {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 3rem;
  color: var(--brand-primary);
  line-height: 1;
}

.count-up.counted {
  animation: countPulse 0.3s ease;
}

@keyframes countPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* ============================================
   Stats Grid
   ============================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-5);
}

.stat-item {
  text-align: center;
  padding: var(--space-6);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
}

.stat-number {
  font-family: var(--font-mono);
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--brand-primary);
  line-height: 1.2;
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: var(--space-2);
}

/* ============================================
   Quote Block
   ============================================ */
.quote-block {
  position: relative;
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-8) var(--space-8) var(--space-16);
  margin: var(--space-6) 0;
}

.quote-block::before {
  content: '\201C';
  position: absolute;
  left: var(--space-4);
  top: var(--space-2);
  font-size: 4rem;
  font-family: var(--font-display);
  color: var(--brand-primary);
  opacity: 0.3;
  line-height: 1;
}

.quote-block p {
  font-style: italic;
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.quote-block cite {
  display: block;
  font-style: normal;
  font-weight: 600;
  color: var(--text-muted);
  font-size: var(--text-sm);
}

/* ============================================
   Bento Grid
   ============================================ */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.bento-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--duration-normal) ease;
}

.bento-item:hover {
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-md);
}

.bento-item.span-2 {
  grid-column: span 2;
}

/* ============================================
   Day Badge
   ============================================ */
.day-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--brand-primary);
  color: var(--paper);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-wider);
  margin-bottom: var(--space-4);
}

.day-badge .material-symbols-outlined {
  font-size: 16px;
}

/* ============================================
   Agenda Cards
   ============================================ */
.agenda-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
}

.agenda-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-decoration: none;
  color: inherit;
  transition: all var(--duration-normal) var(--ease-out-expo);
  display: block;
}

.agenda-card:hover {
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  color: inherit;
}

.agenda-number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--brand-primary);
  letter-spacing: var(--tracking-wider);
  display: block;
  margin-bottom: var(--space-2);
}

.agenda-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
  font-weight: 700;
  color: var(--text-primary);
}

.agenda-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: 0;
}

/* ============================================
   Glass Card
   ============================================ */
.glass-card {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.5);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .glass-card {
  background: rgba(30, 38, 64, 0.7);
  border-color: rgba(255, 255, 255, 0.1);
}

/* ============================================
   Tooltip
   ============================================ */
.tooltip-trigger {
  position: relative;
  cursor: help;
  border-bottom: 1px dashed var(--brand-primary);
}

.tooltip-trigger::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) scale(0.9);
  padding: var(--space-2) var(--space-3);
  background: var(--ink-900);
  color: var(--paper);
  font-size: var(--text-xs);
  font-weight: 400;
  line-height: 1.4;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-fast) ease;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.tooltip-trigger:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) scale(1);
}

/* ============================================
   Timeline
   ============================================ */
.timeline {
  position: relative;
  padding-left: var(--space-10);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--brand-primary), var(--accent-violet));
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-8);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-10));
  top: var(--space-1);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--brand-primary);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 0 2px var(--brand-primary);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

/* ============================================
   Comparison Table
   ============================================ */
.comparison-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  margin: var(--space-6) 0;
}

.comparison-table th {
  background: var(--brand-primary);
  color: var(--paper);
  padding: var(--space-4);
  font-weight: 600;
  text-align: left;
  font-size: var(--text-sm);
}

.comparison-table td {
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table tr:hover td {
  background: var(--bg-secondary);
}

/* ============================================
   Workshop Step
   ============================================ */
.workshop-step {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-5);
  position: relative;
}

.workshop-step::before {
  content: 'STEP ' attr(data-step);
  position: absolute;
  top: -10px;
  left: 20px;
  background: var(--brand-primary);
  color: var(--paper);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-wider);
}

.workshop-step h3 {
  margin-bottom: var(--space-2);
  font-size: var(--text-lg);
}

/* ============================================
   Tip / Warning / Success Boxes
   ============================================ */
.tip-box {
  background: rgba(139, 92, 246, 0.06);
  border: 1px solid rgba(139, 92, 246, 0.15);
  border-left: 3px solid var(--accent-violet);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin: var(--space-5) 0;
}

.tip-box h4 {
  color: var(--accent-violet);
  margin-bottom: var(--space-2);
  font-size: var(--text-base);
}

.warning-box {
  background: rgba(239, 68, 68, 0.06);
  border: 1px solid rgba(239, 68, 68, 0.15);
  border-left: 3px solid var(--error);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin: var(--space-5) 0;
}

.warning-box h4 {
  color: var(--error);
  margin-bottom: var(--space-2);
  font-size: var(--text-base);
}

.success-box {
  background: rgba(16, 185, 129, 0.06);
  border: 1px solid rgba(16, 185, 129, 0.15);
  border-left: 3px solid var(--success);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin: var(--space-5) 0;
}

.success-box h4 {
  color: var(--success);
  margin-bottom: var(--space-2);
  font-size: var(--text-base);
}

/* ============================================
   Icon Badge
   ============================================ */
.icon-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-primary), var(--accent-violet));
  color: var(--paper);
  font-size: 1.25rem;
  flex-shrink: 0;
}

/* ============================================
   Feature List
   ============================================ */
.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--border-subtle);
}

.feature-list li:last-child {
  border-bottom: none;
}

.feature-list .material-symbols-outlined {
  color: var(--success);
  font-size: 1.25rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

/* ============================================
   Floating Action Button (FAB)
   ============================================ */
.fab {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--brand-primary);
  color: var(--paper);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-xl);
  z-index: var(--z-sticky);
  transition: all var(--duration-normal) var(--ease-out-expo);
  border: none;
}

.fab:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-2xl);
}

.fab .material-symbols-outlined {
  font-size: 24px;
}

.fab-menu {
  position: fixed;
  bottom: calc(var(--space-8) + 64px);
  right: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  z-index: var(--z-sticky);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.fab-menu.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.fab-menu-item,
.fab-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: all var(--duration-fast) ease;
}

.fab-menu-item:hover,
.fab-item:hover {
  background: var(--brand-primary);
  color: var(--paper);
  border-color: var(--brand-primary);
}

.fab-item .material-symbols-outlined {
  font-size: 18px;
}

/* ============================================
   Progress Bar
   ============================================ */
.progress-bar {
  height: 8px;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin: var(--space-4) 0;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--brand-primary), var(--accent-violet));
  border-radius: var(--radius-full);
  transition: width 1s var(--ease-out-expo);
  width: 0;
}

/* ============================================
   Checklist
   ============================================ */
.checklist {
  list-style: none;
  padding: 0;
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.checklist li .material-symbols-outlined {
  color: var(--success);
  font-size: 18px;
  flex-shrink: 0;
}

/* ============================================
   Additional Responsive
   ============================================ */
@media (max-width: 768px) {
  .bento-grid {
    grid-template-columns: 1fr;
  }

  .bento-item.span-2 {
    grid-column: span 1;
  }

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

  .count-up {
    font-size: 2rem;
  }

  .glass-card {
    padding: var(--space-4);
  }

  .tab-btn {
    padding: 0.75rem 1rem;
    font-size: var(--text-xs);
  }

  .accordion-header,
  .accordion-trigger {
    padding: 1rem;
    font-size: var(--text-sm);
  }

  .quote-block {
    padding: var(--space-5) var(--space-5) var(--space-5) var(--space-12);
  }

  .fab {
    width: 48px;
    height: 48px;
    bottom: var(--space-5);
    right: var(--space-5);
  }

  .fab-menu {
    bottom: calc(var(--space-5) + 56px);
    right: var(--space-5);
  }

  .day-badge {
    font-size: 0.65rem;
  }
}