:root {
  --bg: #14091f;
  --bg-2: #1f1147;
  --panel: #2a1a5e;
  --panel-2: #34216f;
  --text: #f5f3ff;
  --muted: #b9aee6;
  --accent: #ff5ea0;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  font-family: "Hiragino Sans", "Yu Gothic", "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 10%, #3a1d6e 0%, transparent 45%),
    radial-gradient(circle at 85% 0%, #6a1f5e 0%, transparent 40%),
    var(--bg);
  display: flex;
  flex-direction: column;
  /* セーフエリア（ノッチ）対応 */
  padding:
    max(16px, env(safe-area-inset-top))
    max(16px, env(safe-area-inset-right))
    max(16px, env(safe-area-inset-bottom))
    max(16px, env(safe-area-inset-left));
}

/* ---- ヘッダー ---- */
.site-header {
  text-align: center;
  margin: clamp(16px, 6vw, 48px) 0 clamp(20px, 5vw, 40px);
}
.logo {
  margin: 0;
  font-size: clamp(2rem, 9vw, 3.4rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1.05;
  text-shadow: 0 0 18px rgba(255, 94, 160, 0.45);
}
.logo span {
  color: var(--accent);
}
.tagline {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: clamp(0.85rem, 3.5vw, 1.05rem);
}

/* ---- ゲームグリッド（auto-fill で自然にレスポンシブ） ---- */
main {
  flex: 1;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
}
.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: clamp(14px, 3vw, 22px);
}

/* ---- カード ---- */
.card {
  --card-accent: #7c5cff;
  display: flex;
  flex-direction: column;
  background: linear-gradient(160deg, var(--panel-2), var(--panel));
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.4);
  transition: transform 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease;
}
@media (hover: hover) {
  .card:hover {
    transform: translateY(-4px);
    border-color: var(--card-accent);
    box-shadow: 0 16px 34px rgba(0, 0, 0, 0.5),
                0 0 22px color-mix(in srgb, var(--card-accent) 45%, transparent);
  }
}
.card:focus-visible {
  outline: 3px solid var(--card-accent);
  outline-offset: 2px;
}

/* サムネイル: 通常の block 要素なので aspect-ratio は Safari でも安全 */
.card__thumb {
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(3rem, 12vw, 4.2rem);
  background:
    radial-gradient(circle at 50% 40%,
      color-mix(in srgb, var(--card-accent) 40%, transparent),
      transparent 70%),
    rgba(0, 0, 0, 0.25);
}
.card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card__body {
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.card__title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
}
.card__tagline {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.5;
  flex: 1;
}
.card__tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.card__tags li {
  font-size: 0.7rem;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
}
.card__cta {
  margin-top: 4px;
  align-self: flex-start;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--card-accent);
}

/* 準備中カード */
.card--soon {
  opacity: 0.6;
  cursor: default;
}
.card--soon .card__thumb {
  filter: grayscale(0.5);
}

/* ---- フッター ---- */
.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: clamp(28px, 6vw, 56px);
  padding-bottom: 8px;
}

.notice {
  text-align: center;
  color: var(--muted);
}

/* color-mix 非対応ブラウザ向けの素直なフォールバック */
@supports not (color: color-mix(in srgb, red, blue)) {
  .card:hover {
    box-shadow: 0 16px 34px rgba(0, 0, 0, 0.5);
  }
  .card__thumb {
    background: rgba(0, 0, 0, 0.25);
  }
}