/* ========================================
   リセット & ベース
   ======================================== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #0d0d1a;
  --bg-secondary: #1a1a2e;
  --bg-card: #16213e;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0b0;
  --accent-purple: #a855f7;
  --accent-blue: #3b82f6;
  --accent-green: #22c55e;
  --accent-cyan: #06b6d4;
  --accent-pink: #ec4899;
  --neon-glow: 0 0 10px rgba(168, 85, 247, 0.5), 0 0 20px rgba(168, 85, 247, 0.3);
  --transition: 0.3s ease;
  --radius: 12px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', 'Hiragino Sans', 'Meiryo', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

/* ========================================
   ヘッダー
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(13, 13, 26, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(168, 85, 247, 0.2);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 2px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-list {
  display: flex;
  gap: 32px;
}

.nav-list a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav-list a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-purple);
  transition: width var(--transition);
}

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

.nav-list a:hover::after {
  width: 100%;
}

/* ハンバーガーメニュー */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1100;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   ヒーローエリア
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--bg-primary) 0%, #1a0a2e 50%, var(--bg-secondary) 100%);
}

.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 20px;
}

.hero-title {
  font-size: 3rem;
  font-weight: 900;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff, var(--accent-purple), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 0.8s ease forwards;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  animation: fadeInUp 0.8s ease 0.2s forwards;
  opacity: 0;
}

.btn-cta {
  display: inline-block;
  padding: 14px 40px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  animation: fadeInUp 0.8s ease 0.4s forwards;
  opacity: 0;
}

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

/* ========================================
   ゲーム一覧
   ======================================== */
.games-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 20px;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 32px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* カテゴリータブ */
.category-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.tab {
  padding: 10px 24px;
  border: 1px solid rgba(168, 85, 247, 0.3);
  border-radius: 50px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition);
}

.tab:hover {
  border-color: var(--accent-purple);
  color: var(--text-primary);
}

.tab.active {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  color: #fff;
  border-color: transparent;
}

/* ゲームグリッド */
.games-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* ゲームカード */
.game-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(168, 85, 247, 0.1);
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
  animation: fadeInUp 0.5s ease forwards;
  opacity: 0;
}

.game-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(168, 85, 247, 0.2);
}

.game-card-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
}

.game-card-body {
  padding: 16px;
}

.game-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.game-card-name {
  font-size: 1.1rem;
  font-weight: 700;
}

.badge {
  font-size: 0.7rem;
  padding: 3px 8px;
  border-radius: 50px;
  font-weight: 700;
}

.badge-category {
  background: rgba(168, 85, 247, 0.2);
  color: var(--accent-purple);
}

.badge-new {
  background: rgba(34, 197, 94, 0.2);
  color: var(--accent-green);
  margin-left: 6px;
}

.game-card-rating {
  color: #fbbf24;
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.game-card-btn {
  display: block;
  width: 100%;
  padding: 10px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  text-align: center;
  transition: opacity var(--transition), box-shadow var(--transition);
}

.game-card-btn:hover {
  opacity: 0.9;
  box-shadow: var(--neon-glow);
}

/* ========================================
   モーダル
   ======================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

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

.modal {
  background: var(--bg-secondary);
  border-radius: var(--radius);
  border: 1px solid rgba(168, 85, 247, 0.2);
  max-width: 480px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 24px;
  position: relative;
  transform: translateY(20px);
  transition: transform var(--transition);
}

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

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.2rem;
  cursor: pointer;
  transition: color var(--transition);
}

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

.modal-image {
  width: 100%;
  border-radius: 8px;
  margin-bottom: 16px;
}

.modal-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.modal-category {
  display: inline-block;
  font-size: 0.8rem;
  padding: 4px 12px;
  border-radius: 50px;
  background: rgba(168, 85, 247, 0.2);
  color: var(--accent-purple);
  margin-bottom: 12px;
}

.modal-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 12px;
  line-height: 1.7;
}

.modal-controls {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 20px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
}

.modal-controls::before {
  content: '🕹️ 操作方法：';
  font-weight: 700;
  color: var(--text-primary);
}

.modal-play {
  display: block;
  text-align: center;
  width: 100%;
}

/* ========================================
   フッター
   ======================================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(168, 85, 247, 0.2);
  padding: 40px 20px;
  text-align: center;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-logo {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-copy {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition);
}

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

/* ========================================
   アニメーション
   ======================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========================================
   レスポンシブ
   ======================================== */

/* タブレット */
@media (max-width: 1023px) {
  .games-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-title {
    font-size: 2.2rem;
  }
}

/* スマートフォン */
@media (max-width: 767px) {
  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 260px;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid rgba(168, 85, 247, 0.2);
    transition: right var(--transition);
    z-index: 1050;
    padding-top: 80px;
  }

  .nav.active {
    right: 0;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
    padding: 0 20px;
  }

  .nav-list li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .nav-list a {
    display: block;
    padding: 16px 0;
    font-size: 1.05rem;
  }

  .nav-list a::after {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .games-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .hero-sub {
    font-size: 1rem;
  }

  .btn-cta {
    padding: 12px 32px;
    font-size: 1rem;
  }

  .game-card-name {
    font-size: 0.95rem;
  }
}

@media (max-width: 480px) {
  .games-grid {
    grid-template-columns: 1fr;
  }
}