/* ── Design tokens (Minimalism / Swiss + GitHub-Vercel palette) ─────────── */
:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-2: #f1f5f9;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --color-text: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #64748b;
  --color-accent: #2563eb;
  --color-accent-bg: #eff6ff;
  --color-accent-border: #bfdbfe;
  --color-overlay: #ca8a04;
  --color-overlay-bg: #fefce8;
  --color-overlay-border: #fde68a;
  --color-manual: #b91c1c;
  --color-manual-bg: #fef2f2;
  --color-manual-border: #fecaca;

  --font-sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 999px;

  --shadow-card: 0 1px 0 rgba(15, 23, 42, 0.04);
  --shadow-card-hover: 0 4px 16px -4px rgba(15, 23, 42, 0.08);

  --max-w: 1200px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code, pre { font-family: var(--font-mono); }

/* ── Header ─────────────────────────────────────────────────────────────── */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 56px 32px 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.brand h1 {
  margin: 0 0 10px;
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.tagline {
  margin: 0;
  font-size: 17px;
  color: var(--color-text-secondary);
  max-width: 680px;
  line-height: 1.55;
}
.header-links {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 0;
}
.header-links .link {
  font-size: 14px;
  color: var(--color-text-secondary);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  transition: color 200ms ease, background 200ms ease;
}
.header-links .link + .link { margin-left: 4px; }
.header-links .link:hover {
  background: var(--color-surface-2);
  color: var(--color-accent);
  text-decoration: none;
}

/* ── Install ────────────────────────────────────────────────────────────── */
.install {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.install-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 24px 32px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.install-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  transition: border-color 200ms ease, background 200ms ease;
}
.install-card:hover {
  border-color: var(--color-border-strong);
  background: var(--color-surface);
}
.install-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  margin-bottom: 8px;
}
.install-card pre {
  margin: 0;
  font-size: 13px;
  overflow-x: auto;
  scrollbar-width: thin;
}
.install-card code { color: var(--color-text); }

/* ── Catalog ────────────────────────────────────────────────────────────── */
.catalog {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 40px 32px 24px;
}
.catalog-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.catalog-head h2 {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.catalog-sub {
  margin: 0;
  font-size: 14px;
  color: var(--color-text-muted);
  max-width: 540px;
}

/* ── Tabs ───────────────────────────────────────────────────────────────── */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}
.tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease, border-color 200ms ease;
}
.tab:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}
.tab:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.tab.is-active {
  background: var(--color-text);
  color: #fff;
}
.tab-count {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  padding: 1px 6px;
  border-radius: var(--radius-pill);
  background: rgba(15, 23, 42, 0.08);
  color: inherit;
}
.tab.is-active .tab-count {
  background: rgba(255, 255, 255, 0.18);
}

/* ── Cards ──────────────────────────────────────────────────────────────── */
.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.card {
  position: relative;
  display: block;
  padding: 18px 18px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: inherit;
  box-shadow: var(--shadow-card);
  transition: border-color 200ms ease, box-shadow 200ms ease, transform 200ms ease;
}
.card[hidden] { display: none !important; }
.card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-card-hover);
  text-decoration: none;
}
.card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.card-key {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-muted);
  margin-bottom: 6px;
  letter-spacing: 0.01em;
}
.card-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 14px;
  line-height: 1.35;
}
.card-badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.card-arrow {
  position: absolute;
  top: 18px;
  right: 18px;
  color: var(--color-text-muted);
  opacity: 0;
  transform: translate(-2px, 2px);
  transition: opacity 200ms ease, transform 200ms ease, color 200ms ease;
}
.card:hover .card-arrow {
  opacity: 1;
  transform: translate(0, 0);
  color: var(--color-accent);
}

/* ── Badges ─────────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.3px;
  text-transform: uppercase;
  border: 1px solid transparent;
  white-space: nowrap;
}
.badge-spec    { background: var(--color-accent-bg);  color: var(--color-accent);  border-color: var(--color-accent-border); }
.badge-overlay { background: var(--color-overlay-bg); color: var(--color-overlay); border-color: var(--color-overlay-border); }
.badge-manual  { background: var(--color-manual-bg);  color: var(--color-manual);  border-color: var(--color-manual-border); }
.badge-format {
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  border-color: var(--color-border);
  text-transform: none;
  font-family: var(--font-mono);
  font-weight: 500;
}
.badge-base {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
  text-transform: none;
  font-family: var(--font-mono);
  font-weight: 500;
}

/* ── Empty state ────────────────────────────────────────────────────────── */
.empty {
  margin: 24px 0;
  padding: 24px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 14px;
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
}

/* ── Footer ─────────────────────────────────────────────────────────────── */
.site-footer {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 32px 32px 56px;
  color: var(--color-text-muted);
  font-size: 13px;
  border-top: 1px solid var(--color-border);
  margin-top: 32px;
}
.site-footer p { margin: 0 0 6px; }
.site-footer code {
  background: var(--color-surface-2);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  font-size: 12px;
}
.license {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 1px 6px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
}

/* ── Notice page (Discovery format) ─────────────────────────────────────── */
main.notice {
  max-width: 720px;
  margin: 32px auto;
  padding: 28px 32px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
main.notice h2 { margin-top: 0; font-weight: 600; }
main.notice .hint { color: var(--color-text-muted); font-size: 13px; font-style: italic; }
header .sub { color: var(--color-text-muted); margin: 0 0 12px; font-size: 14px; }
header .links { margin: 0; font-size: 14px; }

/* ── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .install-grid { grid-template-columns: 1fr; }
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 600px) {
  .header-inner, .catalog, .site-footer { padding-left: 20px; padding-right: 20px; }
  .install-grid { padding-left: 20px; padding-right: 20px; }
  .brand h1 { font-size: 28px; }
  .tagline { font-size: 15px; }
  .cards { grid-template-columns: 1fr; }
  .catalog-head { flex-direction: column; align-items: flex-start; gap: 6px; }
}

/* ── Motion respect ─────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}