:root {
  color-scheme: light dark;
  --bg: #fff8ee;
  --bg-elev: #ffffff;
  --card: #ffffff;
  --card-hover: #fff2df;
  --border: #f2d9b3;
  --border-strong: #edb87e;
  --fg: #1c1a17;
  --fg-dim: #55524e;
  --fg-muted: #8a8681;
  --accent: #ff7a45;
  --accent-strong: #ff5b1f;
  --accent-soft: #ffe5d6;
  --secondary: #f6b23a;
  --secondary-strong: #eb9a0b;
  --success: #57b26c;
  --warning: #b77500;
  --danger: #d64545;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(232, 118, 40, 0.08);
  --shadow-md: 0 12px 28px rgba(232, 118, 40, 0.14);
  --font-jp: "Hiragino Sans", "Yu Gothic UI", "Noto Sans JP", "Source Han Sans", sans-serif;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "PingFang SC", "Microsoft YaHei", var(--font-jp);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14110d;
    --bg-elev: #1c1814;
    --card: #221c17;
    --card-hover: #2a231d;
    --border: #3d3128;
    --border-strong: #6c4b2b;
    --fg: #f5eee4;
    --fg-dim: #c7bcae;
    --fg-muted: #8a8177;
    --accent: #ff8a5b;
    --accent-strong: #ffa072;
    --accent-soft: #40261a;
    --secondary: #f6b23a;
    --secondary-strong: #ffce6d;
    --success: #6fbf82;
    --warning: #ffbd54;
    --danger: #ff7770;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 10px 24px rgba(0, 0, 0, 0.55);
  }
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: color-mix(in oklab, var(--card) 90%, transparent);
  box-shadow: var(--shadow-sm);
  width: fit-content;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 5px 13px;
  border-radius: 999px;
  color: var(--fg-dim);
  text-decoration: none;
  font: 600 13px/1.2 var(--font-ui);
  transition: background 0.15s, color 0.15s;
}

.site-nav__link:hover { background: var(--card-hover); color: var(--fg); }
.site-nav__link--active { background: var(--accent-soft); color: var(--accent-strong); }

.site-shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 18px 52px;
}

.site-hero { margin: 26px 0 24px; }
.site-hero__title {
  margin: 0;
  font-size: clamp(28px, 5vw, 42px);
  line-height: 1.15;
  background: linear-gradient(120deg, var(--accent-strong), var(--secondary-strong));
  background-clip: text;
  color: transparent;
}
.site-hero__subtitle { margin: 7px 0 0; color: var(--fg-dim); }

.site-section-title {
  margin: 26px 0 12px;
  color: var(--fg-muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}

.site-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px;
  color: var(--fg);
  text-decoration: none;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.site-card:hover { transform: translateY(-2px); border-color: var(--border-strong); box-shadow: var(--shadow-md); }
.site-card__title { margin: 0; font-size: 17px; line-height: 1.35; }
.site-card__desc { margin: 0; color: var(--fg-dim); font-size: 13px; }
.site-card__meta { margin-top: auto; color: var(--fg-muted); font-size: 12px; }

.site-footer {
  margin-top: 36px;
  color: var(--fg-muted);
  font-size: 12px;
  text-align: center;
}

@media (max-width: 520px) {
  .site-shell { padding: 16px 12px 36px; }
  .site-nav { width: 100%; }
  .site-nav__link { flex: 1; justify-content: center; padding-inline: 8px; }
}