/* ============================================
   Premiere Pro チュートリアルまとめ
   Design System - Light Theme
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Noto+Sans+JP:wght@400;500;600;700;800&display=swap');

/* --- CSS Variables --- */
:root {
  --bg-primary: #f5f7fa;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-muted: #8888a0;
  --border-light: #e8e8f0;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --shadow-hover: 0 12px 48px rgba(0,0,0,0.15);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

  /* Accent Gradients */
  --gradient-purple: linear-gradient(135deg, #7c3aed, #a855f7);
  --gradient-blue: linear-gradient(135deg, #2563eb, #60a5fa);
  --gradient-orange: linear-gradient(135deg, #ea580c, #fb923c);
  --gradient-green: linear-gradient(135deg, #16a34a, #4ade80);
  --gradient-pink: linear-gradient(135deg, #db2777, #f472b6);
  --gradient-red: linear-gradient(135deg, #dc2626, #f87171);
  --gradient-yellow: linear-gradient(135deg, #d97706, #fbbf24);
  --gradient-teal: linear-gradient(135deg, #0d9488, #2dd4bf);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* --- Header --- */
.site-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-light);
  padding: 20px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  background: rgba(255,255,255,0.9);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6, #a855f7);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: white;
  font-weight: 800;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.site-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.site-title span {
  color: var(--text-muted);
  font-weight: 400;
  font-size: 0.85rem;
  display: block;
  letter-spacing: 0;
}

/* --- Pattern Switcher --- */
.pattern-switcher-section {
  max-width: 1200px;
  margin: 40px auto 0;
  padding: 0 24px;
}

.pattern-intro {
  text-align: center;
  margin-bottom: 28px;
}

.pattern-intro h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.pattern-intro p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 540px;
  margin: 0 auto;
}

.pattern-tabs {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.pattern-tab {
  position: relative;
  border: 2px solid var(--border-light);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 24px 32px;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-align: center;
  min-width: 260px;
  max-width: 340px;
  flex: 1;
  box-shadow: var(--shadow-sm);
}

.pattern-tab:hover {
  border-color: #c4b5fd;
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.pattern-tab.active {
  border-color: #7c3aed;
  background: linear-gradient(135deg, #f5f3ff, #ede9fe);
  box-shadow: 0 4px 20px rgba(124, 58, 237, 0.15);
}

.pattern-tab.active::after {
  content: '✓ 選択中';
  position: absolute;
  top: 12px;
  right: 16px;
  background: var(--gradient-purple);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
}

.pattern-tab-icon {
  font-size: 2.2rem;
  margin-bottom: 10px;
  display: block;
}

.pattern-tab-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.pattern-tab-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* --- Main Content --- */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, #f5f3ff, #ede9fe);
  color: #6d28d9;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 20px;
  border: 1px solid #ddd6fe;
}

.section-title {
  font-size: 1.3rem;
  font-weight: 700;
}

/* --- Card Grid --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

/* --- Tutorial Card --- */
.tutorial-card {
  position: relative;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-sm);
}

.tutorial-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}

.card-accent-bar {
  height: 5px;
  width: 100%;
}

.card-body {
  padding: 24px;
}

.card-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 16px;
  color: white;
  box-shadow: var(--shadow-sm);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.card-description {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.card-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.card-arrow {
  position: absolute;
  right: 20px;
  bottom: 20px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.tutorial-card:hover .card-arrow {
  background: var(--gradient-purple);
  color: white;
  transform: translateX(3px);
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-fast);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  max-width: 800px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px) scale(0.97);
  transition: var(--transition-smooth);
}

.modal-overlay.active .modal-container {
  transform: translateY(0) scale(1);
}

.modal-header {
  position: relative;
  padding: 8px 0 0 0;
}

.modal-accent-bar {
  height: 6px;
  border-radius: 24px 24px 0 0;
}

.modal-header-content {
  padding: 28px 32px 20px;
  display: flex;
  align-items: flex-start;
  gap: 18px;
}

.modal-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: white;
  flex-shrink: 0;
}

.modal-title-wrap {
  flex: 1;
}

.modal-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.modal-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--bg-primary);
  color: var(--text-secondary);
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  background: #fee2e2;
  color: #dc2626;
}

.modal-body {
  padding: 0 32px 32px;
}

.modal-section {
  margin-bottom: 28px;
}

.modal-section:last-child {
  margin-bottom: 0;
}

.modal-section-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Video Embed */
.video-embed-wrap {
  position: relative;
  padding-bottom: 56.25%;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #0f0f23;
  box-shadow: var(--shadow-md);
}

.video-embed-wrap iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.video-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #6b7280;
  gap: 12px;
}

.video-placeholder-icon {
  font-size: 3rem;
  opacity: 0.5;
}

.video-placeholder-text {
  font-size: 0.9rem;
}

/* Reference Links */
.ref-link-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ref-link-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--text-primary);
  transition: var(--transition-fast);
  border: 1px solid transparent;
}

.ref-link-item:hover {
  background: #f0edff;
  border-color: #c4b5fd;
  transform: translateX(4px);
}

.ref-link-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.ref-link-text {
  flex: 1;
}

.ref-link-title {
  font-size: 0.92rem;
  font-weight: 600;
}

.ref-link-url {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.ref-link-arrow {
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: var(--transition-fast);
}

.ref-link-item:hover .ref-link-arrow {
  color: #7c3aed;
  transform: translateX(3px);
}

/* Description text in modal/detail */
.detail-description {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
  padding: 16px 20px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  border-left: 4px solid #c4b5fd;
}

/* ============================
   Detail Page Styles
   ============================ */
.detail-page {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.detail-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 10px 20px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition-fast);
  margin-bottom: 28px;
  cursor: pointer;
}

.detail-back-btn:hover {
  color: #7c3aed;
  border-color: #c4b5fd;
  transform: translateX(-4px);
}

.detail-hero {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-md);
  margin-bottom: 32px;
}

.detail-hero-bar {
  height: 6px;
}

.detail-hero-content {
  padding: 32px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.detail-hero-icon {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  color: white;
  flex-shrink: 0;
}

.detail-hero-title {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.detail-hero-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.detail-content-grid {
  display: grid;
  gap: 28px;
}

.detail-section-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.detail-section-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  font-weight: 700;
}

.detail-section-body {
  padding: 24px;
}

/* --- Footer --- */
.site-footer {
  text-align: center;
  padding: 32px 24px;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border-light);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    text-align: center;
  }

  .pattern-tabs {
    flex-direction: column;
    align-items: center;
  }

  .pattern-tab {
    min-width: 100%;
    max-width: 100%;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .modal-header-content {
    padding: 20px;
  }

  .modal-body {
    padding: 0 20px 24px;
  }

  .detail-hero-content {
    flex-direction: column;
    text-align: center;
    padding: 24px;
  }

  .detail-hero-title {
    font-size: 1.3rem;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.tutorial-card {
  animation: fadeInUp 0.5s ease-out both;
}

.tutorial-card:nth-child(1) { animation-delay: 0.05s; }
.tutorial-card:nth-child(2) { animation-delay: 0.1s; }
.tutorial-card:nth-child(3) { animation-delay: 0.15s; }
.tutorial-card:nth-child(4) { animation-delay: 0.2s; }
.tutorial-card:nth-child(5) { animation-delay: 0.25s; }
.tutorial-card:nth-child(6) { animation-delay: 0.3s; }
.tutorial-card:nth-child(7) { animation-delay: 0.35s; }
.tutorial-card:nth-child(8) { animation-delay: 0.4s; }

/* Detail page animation */
.detail-page .detail-section-card {
  animation: fadeInUp 0.5s ease-out both;
}

.detail-page .detail-section-card:nth-child(1) { animation-delay: 0.1s; }
.detail-page .detail-section-card:nth-child(2) { animation-delay: 0.2s; }
.detail-page .detail-section-card:nth-child(3) { animation-delay: 0.3s; }