/* games.hidetaka.dev LP のスタイル。モバイルファースト。ライト/ダークは prefers-color-scheme に追従する */
:root {
  color-scheme: light dark;
  --bg: #f7f7f5;
  --surface: #ffffff;
  --text: #1c1c1a;
  --muted: #5b5b56;
  --border: #dcdcd6;
  --accent: #0b6e4f;
  --accent-contrast: #ffffff;
  --focus: #1a5fd0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121412;
    --surface: #1b1e1b;
    --text: #ece9e3;
    --muted: #a6a69e;
    --border: #2f342f;
    --accent: #5fd0a4;
    --accent-contrast: #0b1a13;
    --focus: #8ab4ff;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", "Yu Gothic", sans-serif;
  line-height: 1.7;
}

.site-header,
main,
.site-footer {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 16px;
}

.site-header {
  padding-top: 40px;
  padding-bottom: 8px;
}

.site-header h1 {
  margin: 0 0 8px;
  font-size: 1.5rem;
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.site-header p {
  margin: 0;
  color: var(--muted);
}

main {
  padding-top: 16px;
  padding-bottom: 32px;
}

h2 {
  margin: 32px 0 12px;
  font-size: 1.05rem;
  color: var(--muted);
  font-weight: 600;
}

.cards {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.card {
  display: block;
  height: 100%;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: inherit;
  text-decoration: none;
  transition: border-color 0.15s ease;
}

.card:hover {
  border-color: var(--accent);
}

.card-external .card-title::after {
  content: " \2197";
  color: var(--muted);
}

.card-title {
  margin: 0 0 4px;
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--accent);
}

.card-desc {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.empty {
  color: var(--muted);
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.site-footer {
  padding-top: 16px;
  padding-bottom: 40px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}

.site-footer p {
  margin: 16px 0 0;
}

@media (min-width: 40rem) {
  .site-header {
    padding-top: 72px;
  }

  .site-header h1 {
    font-size: 2rem;
  }

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

@media (prefers-reduced-motion: reduce) {
  .card {
    transition: none;
  }
}