:root {
  --bg: #0a0a0a;
  --bg-2: #1a1a1a;
  --gold: #d4af37;
  --gold-bright: #f5d76e;
  --text: #f0f0f0;
  --text-mute: #999;

  --baccarat: #c8d62a;        /* 黄緑 (PLAYER色) */
  --baccarat-2: #c1272d;      /* 赤 (BANKER色) */
  --kakegami: #ff8c1a;        /* オレンジ (タイ系) */
  --kakegami-2: #b3341a;      /* 暗いオレンジレッド */
  --mahjong: #2e8b57;         /* 緑 (麻雀卓色) */
  --mahjong-2: #074d2e;       /* 暗い緑 */
  --anzan: #d4a83d;           /* 金 (暗算 学びテイスト) */
  --anzan-2: #6b1d1d;         /* 朱色 */
  --hukeisan: #c14545;        /* 朱色系 (符計算) */
  --hukeisan-2: #6b1d1d;      /* 深い朱色 */
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Segoe UI', 'Hiragino Sans', 'Noto Sans JP', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 64vh;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(212,175,55,0.18) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 80%, rgba(193,39,45,0.12) 0%, transparent 60%),
    linear-gradient(180deg, #0c1418 0%, #000 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px 100px;
  border-bottom: 1px solid rgba(212,175,55,0.25);
  overflow: hidden;
}
.hero-inner {
  text-align: center;
  z-index: 2;
  max-width: 800px;
}
.hero-title {
  font-size: clamp(48px, 9vw, 120px);
  font-weight: 900;
  letter-spacing: 6px;
  background: linear-gradient(180deg, var(--gold-bright), var(--gold) 60%, #8a6a14);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 4px 20px rgba(212,175,55,0.3));
  margin-bottom: 12px;
}
.hero-title span {
  display: inline-block;
  color: var(--text);
  background: none;
  -webkit-text-fill-color: var(--text);
  letter-spacing: 8px;
}
.hero-subtitle {
  font-size: clamp(16px, 2.4vw, 22px);
  color: var(--gold-bright);
  letter-spacing: 3px;
  margin-bottom: 18px;
  text-transform: uppercase;
}
.hero-lead {
  font-size: clamp(13px, 1.8vw, 16px);
  color: var(--text-mute);
  max-width: 500px;
  margin: 0 auto;
}
.hero-decor {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 15% 30%, rgba(255,255,255,0.04) 0 1px, transparent 2px),
    radial-gradient(circle at 80% 60%, rgba(255,255,255,0.04) 0 1px, transparent 2px),
    radial-gradient(circle at 50% 80%, rgba(255,255,255,0.03) 0 1px, transparent 2px);
  background-size: 60px 60px, 80px 80px, 50px 50px;
  pointer-events: none;
}

/* ===== Games ===== */
.games {
  max-width: 1100px;
  margin: -60px auto 80px;
  padding: 0 20px;
  position: relative;
  z-index: 3;
}
.section-title {
  text-align: center;
  font-size: clamp(20px, 3vw, 28px);
  letter-spacing: 8px;
  color: var(--gold-bright);
  margin-bottom: 40px;
  font-weight: 700;
}
.section-title::before,
.section-title::after {
  content: '';
  display: inline-block;
  width: 40px;
  height: 1px;
  background: var(--gold);
  margin: 0 16px;
  vertical-align: middle;
}

.game-card {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 28px;
  background: var(--bg-2);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: 32px;
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.game-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 6px;
  height: 100%;
  background: var(--gold);
}
.game-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

/* テーマ別アクセント */
.game-card.baccarat::before { background: linear-gradient(180deg, var(--baccarat), var(--baccarat-2)); }
.game-card.baccarat:hover { border-color: var(--baccarat); box-shadow: 0 20px 40px rgba(0,0,0,0.5), 0 0 0 1px rgba(200,214,42,0.2); }
.game-card.kakegami::before { background: linear-gradient(180deg, var(--kakegami), var(--kakegami-2)); }
.game-card.kakegami:hover { border-color: var(--kakegami); box-shadow: 0 20px 40px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,140,26,0.2); }
.game-card.mahjong::before { background: linear-gradient(180deg, var(--mahjong), var(--mahjong-2)); }
.game-card.mahjong:hover { border-color: var(--mahjong); box-shadow: 0 20px 40px rgba(0,0,0,0.5), 0 0 0 1px rgba(46,139,87,0.2); }
.game-card.anzan::before { background: linear-gradient(180deg, var(--anzan), var(--anzan-2)); }
.game-card.anzan:hover { border-color: var(--anzan); box-shadow: 0 20px 40px rgba(0,0,0,0.5), 0 0 0 1px rgba(212,168,61,0.2); }
.game-card.hukeisan::before { background: linear-gradient(180deg, var(--hukeisan), var(--hukeisan-2)); }
.game-card.hukeisan:hover { border-color: var(--hukeisan); box-shadow: 0 20px 40px rgba(0,0,0,0.5), 0 0 0 1px rgba(193,69,69,0.2); }

.game-icon {
  font-size: 96px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.03);
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.06);
  align-self: stretch;
  min-height: 180px;
}
.game-card.baccarat .game-icon { background: linear-gradient(135deg, rgba(200,214,42,0.15), rgba(193,39,45,0.15)); border-color: rgba(200,214,42,0.3); }
.game-card.kakegami .game-icon { background: linear-gradient(135deg, rgba(255,140,26,0.15), rgba(179,52,26,0.15)); border-color: rgba(255,140,26,0.3); }
.game-card.mahjong .game-icon { background: linear-gradient(135deg, rgba(46,139,87,0.15), rgba(7,77,46,0.15)); border-color: rgba(46,139,87,0.3); }
.game-card.anzan .game-icon { background: linear-gradient(135deg, rgba(212,168,61,0.15), rgba(107,29,29,0.15)); border-color: rgba(212,168,61,0.3); }
.game-card.hukeisan .game-icon { background: linear-gradient(135deg, rgba(193,69,69,0.15), rgba(107,29,29,0.15)); border-color: rgba(193,69,69,0.3); }

.game-body { display: flex; flex-direction: column; }

.game-title {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 6px;
}
.title-sub {
  font-size: 14px;
  color: var(--text-mute);
  font-weight: 500;
  letter-spacing: 1px;
  margin-left: 4px;
}
.game-tagline {
  font-size: 14px;
  color: var(--gold-bright);
  margin-bottom: 14px;
}
.game-card.kakegami .game-tagline { color: var(--kakegami); }
.game-card.mahjong .game-tagline { color: #6ee0a0; }
.game-card.baccarat .game-tagline { color: #e0f070; }
.game-card.anzan .game-tagline { color: #f0c860; }
.game-card.hukeisan .game-tagline { color: #ffa1a1; }

.game-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}
.feature-tag {
  font-size: 11px;
  letter-spacing: 1px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--text-mute);
  padding: 4px 12px;
  border-radius: 999px;
}

.game-desc h4 {
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--gold-bright);
  margin: 14px 0 8px;
  text-transform: uppercase;
  font-weight: 700;
}
.game-card.kakegami .game-desc h4 { color: var(--kakegami); }
.game-card.mahjong .game-desc h4 { color: #6ee0a0; }
.game-card.baccarat .game-desc h4 { color: #e0f070; }
.game-card.anzan .game-desc h4 { color: #f0c860; }
.game-card.hukeisan .game-desc h4 { color: #ffa1a1; }
.game-desc ol, .game-desc ul {
  margin-left: 20px;
  font-size: 14px;
  color: #ccc;
}
.game-desc li { margin-bottom: 4px; }
.game-desc strong { color: var(--gold-bright); }

.play-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 24px;
  padding: 14px 32px;
  background: linear-gradient(180deg, var(--gold-bright), var(--gold));
  color: #000;
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 2px;
  border-radius: 8px;
  align-self: flex-start;
  transition: transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 4px 14px rgba(212,175,55,0.3);
}
.play-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212,175,55,0.5);
}
.game-card.baccarat .play-btn { background: linear-gradient(180deg, var(--baccarat), #98a01f); color: #000; box-shadow: 0 4px 14px rgba(200,214,42,0.3); }
.game-card.baccarat .play-btn:hover { box-shadow: 0 8px 24px rgba(200,214,42,0.5); }
.game-card.kakegami .play-btn { background: linear-gradient(180deg, var(--kakegami), var(--kakegami-2)); color: white; box-shadow: 0 4px 14px rgba(255,140,26,0.3); }
.game-card.kakegami .play-btn:hover { box-shadow: 0 8px 24px rgba(255,140,26,0.5); }
.game-card.mahjong .play-btn { background: linear-gradient(180deg, #4cc080, var(--mahjong)); color: white; box-shadow: 0 4px 14px rgba(46,139,87,0.3); }
.game-card.mahjong .play-btn:hover { box-shadow: 0 8px 24px rgba(46,139,87,0.5); }
.game-card.anzan .play-btn { background: linear-gradient(180deg, var(--anzan), var(--anzan-2)); color: #fff; box-shadow: 0 4px 14px rgba(212,168,61,0.3); }
.game-card.anzan .play-btn:hover { box-shadow: 0 8px 24px rgba(212,168,61,0.5); }
.game-card.hukeisan .play-btn { background: linear-gradient(180deg, var(--hukeisan), var(--hukeisan-2)); color: white; box-shadow: 0 4px 14px rgba(193,69,69,0.3); }
.game-card.hukeisan .play-btn:hover { box-shadow: 0 8px 24px rgba(193,69,69,0.5); }

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 32px 20px;
  border-top: 1px solid rgba(255,255,255,0.06);
  color: var(--text-mute);
  font-size: 13px;
}
.footer-note { margin-top: 6px; font-size: 11px; }

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 14px;
  margin-bottom: 16px;
  font-size: 13px;
}
.footer-nav-label { opacity: 0.6; margin-right: 4px; }
.footer-nav a {
  color: var(--text-mute);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,255,255,0.18);
  padding-bottom: 1px;
  transition: color 0.15s, border-color 0.15s;
}
.footer-nav a:hover {
  color: #fff;
  border-bottom-color: rgba(255,255,255,0.6);
}

/* ===== レスポンシブ ===== */
@media (max-width: 720px) {
  .game-card {
    grid-template-columns: 1fr;
    padding: 24px 20px;
    gap: 20px;
  }
  .game-icon {
    min-height: 120px;
    font-size: 64px;
  }
  .game-title { font-size: 22px; }
  .games { margin-top: -40px; }
  .play-btn { padding: 12px 24px; font-size: 14px; }
}

@media (max-width: 420px) {
  .hero { padding: 60px 16px 80px; }
  .section-title::before, .section-title::after { width: 20px; margin: 0 8px; }
  .game-desc ol, .game-desc ul { font-size: 13px; }
}