/* ═══════════════════════════════════════════════════════════
   Olbrain Docs — layout & components
   Built on tokens.css. Pure b/w, sharp corners, no shadows.
   ═══════════════════════════════════════════════════════════ */
@import url('./tokens.css');

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--fg-2);
  overflow-x: hidden;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-underline-offset: 3px; }

/* ── Top navigation ───────────────────────────── */
.docs-nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.85rem clamp(1rem, 5vw, 2rem);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  height: 60px;
}
.docs-nav .brand {
  display: flex; align-items: center; gap: 0.75rem;
  text-decoration: none;
}
.docs-nav .brand img { height: 28px; width: auto; }
.docs-nav .brand .docs-tag {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-sm);
  letter-spacing: var(--ls-section);
  text-transform: uppercase;
  color: var(--fg-3);
  padding-left: 0.75rem;
  border-left: 1px solid var(--border);
}
.docs-nav .nav-right {
  display: flex; align-items: center; gap: 1.75rem;
}
.docs-nav .nav-link {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-sm);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--fg-3);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}
.docs-nav .nav-link:hover,
.docs-nav .nav-link.active { color: var(--fg-1); }

/* ── Page shell ───────────────────────────────── */
.docs-shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  max-width: 1280px;
  margin: 0 auto;
  min-height: calc(100vh - 60px);
}

/* ── Sidebar ──────────────────────────────────── */
.docs-side {
  border-right: 1px solid var(--border);
  padding: 2.5rem 0 4rem 0;
  position: sticky; top: 60px;
  height: calc(100vh - 60px);
  overflow-y: auto;
}
.docs-side .group {
  padding: 0 1.5rem;
  margin-bottom: 2rem;
}
.docs-side .group-label {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-xs);
  letter-spacing: var(--ls-section);
  text-transform: uppercase;
  color: var(--fg-3);
  margin-bottom: 0.75rem;
  display: flex; align-items: center; gap: 0.5rem;
}
.docs-side .group-label .num {
  font-weight: var(--fw-semibold); color: var(--fg-2);
}
.docs-side ul { list-style: none; display: flex; flex-direction: column; }
.docs-side li a {
  display: block;
  padding: 0.45rem 0.75rem;
  margin-left: -0.75rem;
  font-size: 0.875rem;
  color: var(--fg-2);
  text-decoration: none;
  border-left: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.docs-side li a:hover { color: var(--fg-1); }
.docs-side li a.active {
  color: var(--fg-1);
  border-left-color: var(--fg-1);
  font-weight: var(--fw-medium);
}

/* ── Main content area ────────────────────────── */
.docs-main {
  padding: 3.5rem clamp(1.5rem, 4vw, 4rem) 6rem;
  min-width: 0;
  max-width: 920px;
}

.docs-main .eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-sm);
  letter-spacing: var(--ls-section);
  text-transform: uppercase;
  color: var(--fg-3);
  margin-bottom: 1rem;
  display: block;
}

.docs-main h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--fw-extrabold);
  letter-spacing: var(--ls-tightest);
  line-height: var(--lh-tighter);
  color: var(--fg-1);
  margin-bottom: 1.25rem;
}
.docs-main .lead {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--fg-2);
  margin-bottom: 2.5rem;
  max-width: 680px;
}
.docs-main h2 {
  font-size: 1.6rem;
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tighter);
  line-height: var(--lh-tight);
  color: var(--fg-1);
  margin: 3rem 0 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.docs-main h2:first-of-type { border-top: none; padding-top: 0; }
.docs-main h3 {
  font-size: 1.15rem;
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-tight);
  color: var(--fg-1);
  margin: 2rem 0 0.75rem;
}
.docs-main h4 {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-sm);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wider);
  color: var(--fg-1);
  margin: 1.5rem 0 0.5rem;
}
.docs-main p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--fg-2);
  margin-bottom: 1rem;
}
.docs-main p strong { color: var(--fg-1); font-weight: var(--fw-semibold); }
.docs-main ul, .docs-main ol {
  margin: 0 0 1.25rem 1.25rem;
  color: var(--fg-2);
}
.docs-main li {
  margin-bottom: 0.4rem;
  line-height: 1.6;
}
.docs-main a:not(.btn):not(.card-link) {
  color: var(--fg-1);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.docs-main a:not(.btn):not(.card-link):hover {
  color: var(--fg-2);
}

/* ── Inline code ──────────────────────────────── */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  color: var(--fg-1);
  background: rgba(0, 0, 0, 0.04);
  padding: 0.1rem 0.35rem;
  border: 1px solid var(--border);
}

/* ── Code blocks ──────────────────────────────── */
.code-block {
  margin: 1.25rem 0 1.75rem;
  border: 1px solid var(--border);
  background: var(--bg-invert);
  color: var(--fg-invert);
  overflow: hidden;
}
.code-block .code-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-family: var(--font-mono);
  font-size: var(--fs-mono-xs);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
}
.code-block pre {
  padding: 1.25rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
}
.code-block pre code {
  background: transparent;
  border: none;
  padding: 0;
  color: var(--fg-invert);
  font-size: inherit;
}

/* Color hints inside dark code blocks */
.code-block .k { color: #9cdcfe; }     /* keyword */
.code-block .s { color: #ce9178; }     /* string */
.code-block .c { color: #6a9955; }     /* comment */
.code-block .n { color: #b5cea8; }     /* number */
.code-block .p { color: #c586c0; }     /* punctuation/method */
.code-block .v { color: #dcdcaa; }     /* variable / value */

/* ── Tables ───────────────────────────────────── */
.docs-main table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--border);
  margin: 1.5rem 0;
  font-size: 0.9rem;
}
.docs-main th, .docs-main td {
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.docs-main th {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-sm);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  font-weight: var(--fw-semibold);
  color: var(--fg-1);
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-strong);
}
.docs-main td { color: var(--fg-2); }
.docs-main td code { white-space: nowrap; }
.docs-main tr:last-child td { border-bottom: none; }

/* ── Status pills inside tables ───────────────── */
.method {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wider);
  padding: 0.18rem 0.55rem;
  border: 1px solid var(--fg-1);
  color: var(--fg-1);
  text-transform: uppercase;
}
.method.post { background: var(--fg-1); color: var(--bg); }
.method.get  { background: transparent; }
.method.all  { background: rgba(0,0,0,0.04); }

.status {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: var(--fw-semibold);
  padding: 0.1rem 0.5rem;
  border: 1px solid var(--border);
  color: var(--fg-1);
}
.status.s2xx { border-color: var(--fg-1); background: var(--fg-1); color: var(--bg); }
.status.s4xx { border-color: var(--fg-1); }
.status.s5xx { border-color: var(--fg-2); color: var(--fg-2); }

/* ── Callout ──────────────────────────────────── */
.callout {
  border: 1px solid var(--border);
  border-left: 2px solid var(--fg-1);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  background: rgba(0, 0, 0, 0.02);
}
.callout .callout-label {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-xs);
  letter-spacing: var(--ls-section);
  text-transform: uppercase;
  font-weight: var(--fw-semibold);
  color: var(--fg-1);
  margin-bottom: 0.4rem;
}
.callout p { font-size: 0.92rem; margin-bottom: 0; }
.callout p + p { margin-top: 0.5rem; }

/* ── Endpoint header ──────────────────────────── */
.endpoint {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border-strong);
  margin: 1.5rem 0 2rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--fg-1);
  background: var(--bg-subtle);
  overflow-x: auto;
  white-space: nowrap;
}
.endpoint .method { flex-shrink: 0; }
.endpoint .path { color: var(--fg-1); font-weight: var(--fw-medium); }
.endpoint .path .param { color: var(--fg-2); }

/* ── Card grid (homepage) ─────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0 3rem;
}
.doc-card {
  display: flex; flex-direction: column;
  padding: 1.75rem 1.5rem;
  border: 1px solid var(--border);
  text-decoration: none;
  background: transparent;
  transition: border-color var(--dur) var(--ease);
  min-height: 180px;
}
.doc-card:hover { border-color: var(--border-strong); }
.doc-card .card-num {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: var(--fs-mono-sm);
  color: var(--fg-3);
  margin-bottom: 1rem;
}
.doc-card:hover .card-num { color: var(--fg-1); border-color: var(--fg-1); }
.doc-card h3 {
  font-size: 1.05rem;
  font-weight: var(--fw-semibold);
  color: var(--fg-1);
  margin-bottom: 0.4rem;
}
.doc-card p {
  font-size: 0.88rem;
  color: var(--fg-2);
  line-height: 1.55;
  margin: 0;
  flex: 1;
}
.doc-card .card-arrow {
  display: inline-block;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--fg-1);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
}

/* ── Page footer (in-page nav) ────────────────── */
.page-footer-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.page-footer-nav a {
  display: flex; flex-direction: column; gap: 0.25rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease);
}
.page-footer-nav a:hover { border-color: var(--border-strong); }
.page-footer-nav .pf-label {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-xs);
  letter-spacing: var(--ls-section);
  text-transform: uppercase;
  color: var(--fg-3);
}
.page-footer-nav .pf-title {
  font-size: 0.95rem;
  font-weight: var(--fw-semibold);
  color: var(--fg-1);
}
.page-footer-nav .pf-next { text-align: right; }
.page-footer-nav .pf-prev:only-child { grid-column: 1 / 2; }

/* ── Site footer ──────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem clamp(1rem, 5vw, 2rem);
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 1rem;
  max-width: 1280px;
  margin: 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-mono-sm);
  color: var(--fg-3);
}
.site-footer .footer-links { display: flex; gap: 1.5rem; }
.site-footer a { text-decoration: none; transition: color var(--dur) var(--ease); }
.site-footer a:hover { color: var(--fg-1); }

/* ── Mobile nav toggle ────────────────────────── */
.sidebar-toggle { display: none; }

/* ── Responsive ───────────────────────────────── */
@media (max-width: 900px) {
  .docs-shell { grid-template-columns: 1fr; }
  .docs-side {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 0;
  }
  .docs-main { padding: 2.5rem 1.5rem 4rem; }
  .docs-nav .nav-right { gap: 1rem; }
  .docs-nav .nav-link.hide-mobile { display: none; }
}

@media (max-width: 600px) {
  .docs-nav .brand .docs-tag { display: none; }
  .card-grid { grid-template-columns: 1fr; }
  .page-footer-nav { grid-template-columns: 1fr; }
}