/* グローバルスタイル — 夜のラボ ダークテーマ */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@400;700&family=Noto+Sans+JP:wght@300;400;700&family=Cormorant+Garamond:ital,wght@0,400;0,600;1,400&display=swap');

/* ━━━ カラーパレット ━━━ */
:root {
  --bg-primary:    #0a0008;
  --bg-secondary:  #120011;
  --bg-card:       #1a0018;
  --bg-card-hover: #220020;

  --accent-crimson:  #c0143c;
  --accent-rose:     #e8396b;
  --accent-magenta:  #9b2f7a;
  --accent-purple:   #5c1a6e;
  --accent-gold:     #d4a562;

  --text-primary:   #f0e0ec;
  --text-secondary: #b08aa0;
  --text-muted:     #6a4a60;

  --border-subtle:  rgba(192, 20, 60, 0.2);
  --border-accent:  rgba(192, 20, 60, 0.5);

  --glow-crimson: 0 0 20px rgba(192, 20, 60, 0.4);
  --glow-rose:    0 0 30px rgba(232, 57, 107, 0.3);
  --glow-purple:  0 0 15px rgba(92, 26, 110, 0.5);
}

/* ━━━ リセット ━━━ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 300;
  line-height: 1.8;
  min-height: 100vh;
  overflow-x: hidden;

  /* 微細なテクスチャ */
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(92, 26, 110, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(192, 20, 60, 0.06) 0%, transparent 40%);
}

/* ━━━ タイポグラフィ ━━━ */
h1, h2, h3 {
  font-family: 'Noto Serif JP', serif;
  font-weight: 700;
  letter-spacing: 0.05em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: clamp(1rem, 2vw, 1.3rem); }

a {
  color: var(--accent-rose);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--text-primary);
}

/* ━━━ スクロールバー ━━━ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb {
  background: var(--accent-crimson);
  border-radius: 3px;
}

/* ━━━ ヘッダー ━━━ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 0, 8, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 2rem;
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 2rem;
}

.logo {
  font-family: 'Cormorant Garamond', 'Noto Serif JP', serif;
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo span {
  color: var(--accent-crimson);
}

.logo-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.2em;
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 300;
}

.header-nav {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.header-nav a {
  color: var(--text-secondary);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  transition: color 0.2s;
}

.header-nav a:hover {
  color: var(--accent-rose);
}

.age-badge {
  background: var(--accent-crimson);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

/* ━━━ フッター ━━━ */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
  padding: 3rem 2rem 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.8rem;
}

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

/* ━━━ カード ━━━ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.3s ease;
  position: relative;
}

.card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--glow-crimson);
  transform: translateY(-2px);
  background: var(--bg-card-hover);
}

/* ━━━ グロウボタン ━━━ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--accent-crimson), var(--accent-magenta));
  color: white;
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.75rem 1.75rem;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: all 0.3s ease;
  text-decoration: none;
}

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

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.85rem;
  padding: 0.6rem 1.25rem;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: all 0.3s ease;
  text-decoration: none;
}

.btn-ghost:hover {
  border-color: var(--accent-crimson);
  color: var(--text-primary);
}

/* ━━━ バッジ ━━━ */
.badge {
  display: inline-block;
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  letter-spacing: 0.05em;
  font-weight: 700;
}

.badge-new {
  background: rgba(192, 20, 60, 0.2);
  color: var(--accent-rose);
  border: 1px solid rgba(192, 20, 60, 0.4);
}

.badge-rank {
  background: rgba(212, 165, 98, 0.15);
  color: var(--accent-gold);
  border: 1px solid rgba(212, 165, 98, 0.3);
}

/* ━━━ セクションタイトル ━━━ */
.section-title {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.section-title h2 {
  color: var(--text-primary);
}

.section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--border-accent), transparent);
}

/* ━━━ 区切り線 ━━━ */
.divider {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border-accent), transparent);
  margin: 3rem 0;
}

/* ━━━ レイアウト ━━━ */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ━━━ 年齢認証オーバーレイ ━━━ */
#age-gate {
  position: fixed;
  inset: 0;
  background: rgba(5, 0, 8, 0.97);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
}

.age-gate-box {
  text-align: center;
  max-width: 400px;
  padding: 3rem 2rem;
  border: 1px solid var(--border-accent);
  border-radius: 12px;
  background: var(--bg-card);
  box-shadow: var(--glow-purple), 0 0 60px rgba(0, 0, 0, 0.8);
}

.age-gate-box h2 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.age-gate-box p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.age-gate-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* ━━━ アニメーション ━━━ */
@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 10px rgba(192, 20, 60, 0.3); }
  50% { box-shadow: 0 0 25px rgba(192, 20, 60, 0.6); }
}

@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.animate-fade-in-up {
  animation: fade-in-up 0.6s ease forwards;
}

/* ━━━ ユーティリティ ━━━ */
.text-crimson  { color: var(--accent-crimson); }
.text-rose     { color: var(--accent-rose); }
.text-gold     { color: var(--accent-gold); }
.text-muted    { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }

@media (max-width: 768px) {
  .header-nav { display: none; }
  .container { padding: 0 1rem; }
}