:root {
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --fg: #1f2937;
  --fg-muted: #64748b;
  --border: #e5e7eb;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --code-bg: #f1f5f9;
  --code-fg: #0f172a;
  --badge-ok-bg: #dcfce7;
  --badge-ok-fg: #166534;
  --badge-near-bg: #fef3c7;
  --badge-near-fg: #92400e;
  --badge-wip-bg: #e0e7ff;
  --badge-wip-fg: #3730a3;
  --badge-private-bg: #f1f5f9;
  --badge-private-fg: #475569;
  --badge-ext-bg: #f1f5f9;
  --badge-ext-fg: #475569;
  --max: 1100px;
  --radius: 10px;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f17;
    --bg-soft: #111827;
    --fg: #e5e7eb;
    --fg-muted: #9ca3af;
    --border: #1f2937;
    --accent: #60a5fa;
    --accent-hover: #93c5fd;
    --code-bg: #0f1623;
    --code-fg: #e5e7eb;
    --badge-ok-bg: #052e16;
    --badge-ok-fg: #86efac;
    --badge-near-bg: #3b2305;
    --badge-near-fg: #fcd34d;
    --badge-wip-bg: #1e1b4b;
    --badge-wip-fg: #c7d2fe;
    --badge-private-bg: #1f2937;
    --badge-private-fg: #cbd5e1;
    --badge-ext-bg: #1f2937;
    --badge-ext-fg: #cbd5e1;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent); }
a:hover { color: var(--accent-hover); }

:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}
.btn:focus-visible,
.card footer a:focus-visible {
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}
@media (prefers-color-scheme: dark) {
  .site-header { background: rgba(11, 15, 23, 0.85); }
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}
.brand {
  font-weight: 600;
  color: var(--fg);
  text-decoration: none;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
}
.site-header nav a {
  margin-left: 1.5rem;
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.95rem;
}
.site-header nav a:hover { color: var(--fg); }

/* Hero */
.hero {
  padding: 6rem 0 4.5rem;
  border-bottom: 1px solid var(--border);
}
.hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  line-height: 1.1;
  margin: 0 0 1rem;
  letter-spacing: -0.025em;
  font-weight: 700;
}
.hero .lede {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 58ch;
  margin: 0 0 2rem;
}
.cta { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 0.65rem 1.2rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}
.btn:hover {
  border-color: var(--accent);
  color: var(--fg);
}
.btn-primary {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #ffffff;
}

/* Sections */
section { padding: 5rem 0; }
section h2 {
  font-size: clamp(1.5rem, 2.5vw, 1.85rem);
  margin: 0 0 1rem;
  letter-spacing: -0.015em;
  font-weight: 700;
}
section > .container > p {
  color: var(--fg-muted);
  max-width: 64ch;
  margin-top: 0;
  margin-bottom: 2.5rem;
  font-size: 1.02rem;
}

/* Pipeline */
.pipeline figure {
  margin: 0;
  padding: 1.75rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.pipeline img {
  display: block;
  width: 100%;
  height: auto;
}
.pipeline figcaption {
  margin-top: 1rem;
  color: var(--fg-muted);
  font-size: 0.875rem;
  text-align: center;
}

/* Package grid */
.layer { margin-bottom: 2.75rem; }
.layer:last-child { margin-bottom: 0; }
.layer h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-muted);
  margin: 0 0 1rem;
  font-weight: 600;
}
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}
.card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s, transform 0.15s;
}
.card:hover {
  border-color: var(--fg-muted);
}
.card header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 0.6rem;
}
.card h4 {
  font-size: 1rem;
  margin: 0;
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: -0.01em;
}
.card p {
  color: var(--fg-muted);
  margin: 0 0 1.1rem;
  font-size: 0.93rem;
  line-height: 1.55;
  flex: 1;
}
.card footer {
  display: flex;
  gap: 1.25rem;
}
.card footer a {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
}
.card footer a:hover { text-decoration: underline; }

.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.badge-ok { background: var(--badge-ok-bg); color: var(--badge-ok-fg); }
.badge-near { background: var(--badge-near-bg); color: var(--badge-near-fg); }
.badge-wip { background: var(--badge-wip-bg); color: var(--badge-wip-fg); }
.badge-private { background: var(--badge-private-bg); color: var(--badge-private-fg); }
.badge-ext { background: var(--badge-ext-bg); color: var(--badge-ext-fg); }

/* About */
.about {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.about .container > p {
  max-width: 68ch;
  color: var(--fg);
  font-size: 1.02rem;
  margin-bottom: 1.25rem;
}
.about .container > p:last-child {
  color: var(--fg-muted);
  font-size: 0.95rem;
  margin-bottom: 0;
}

code {
  background: var(--code-bg);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.88em;
  font-family: var(--mono);
}

/* Footer */
.site-footer {
  padding: 2.5rem 0;
  color: var(--fg-muted);
  font-size: 0.9rem;
  text-align: center;
}
.site-footer p { margin: 0; }
.site-footer a { color: var(--fg-muted); text-decoration: none; }
.site-footer a:hover { color: var(--fg); }

/* Responsive */
@media (max-width: 640px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  .site-header nav a { margin-left: 0; margin-right: 1.2rem; }
  .hero { padding: 3.5rem 0 3rem; }
  section { padding: 3.5rem 0; }
  .pipeline figure { padding: 1rem; }
  pre { padding: 1rem; font-size: 0.82rem; }
}