/* DocuBrowse site — Material Design 3 inspired, system fonts, no external requests */
:root {
  --primary: #0b57d0;
  --on-primary: #fff;
  --primary-container: #d3e3fd;
  --on-primary-container: #041e49;
  --surface: #fdfbff;
  --surface-1: #f3f6fc;
  --surface-2: #e9eef6;
  --on-surface: #1b1b1f;
  --on-surface-var: #44474e;
  --outline: #c4c7d0;
  --code-bg: #eef1f7;
  --elev-1: 0 1px 2px rgba(0,0,0,.3), 0 1px 3px 1px rgba(0,0,0,.15);
  --elev-2: 0 1px 2px rgba(0,0,0,.3), 0 2px 6px 2px rgba(0,0,0,.15);
  --radius: 16px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --primary: #a8c7fa;
    --on-primary: #062e6f;
    --primary-container: #0842a0;
    --on-primary-container: #d3e3fd;
    --surface: #111318;
    --surface-1: #1a1d24;
    --surface-2: #22262e;
    --on-surface: #e3e2e6;
    --on-surface-var: #c4c6d0;
    --outline: #44474e;
    --code-bg: #1e222a;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0; font-family: var(--font); font-size: 16px; line-height: 1.65;
  color: var(--on-surface); background: var(--surface);
}
a { color: var(--primary); }
img { max-width: 100%; height: auto; }

/* Top app bar */
.appbar {
  position: sticky; top: 0; z-index: 10; height: 64px;
  display: flex; align-items: center; gap: 8px; padding: 0 16px;
  background: var(--surface-1); box-shadow: var(--elev-1);
}
.appbar .brand {
  display: flex; align-items: center; gap: 10px; margin-right: auto;
  font-size: 1.25rem; font-weight: 600; color: var(--on-surface); text-decoration: none;
}
.appbar .brand img { width: 32px; height: 32px; }
.appbar nav { display: flex; gap: 4px; }
.appbar nav a {
  padding: 8px 14px; border-radius: 20px; text-decoration: none;
  color: var(--on-surface-var); font-weight: 500; font-size: .95rem;
}
.appbar nav a:hover { background: var(--surface-2); }
.appbar nav a[aria-current="page"] { background: var(--primary-container); color: var(--on-primary-container); }
.menu-btn { display: none; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px; height: 40px; padding: 0 24px;
  border-radius: 20px; border: 1px solid transparent; cursor: pointer;
  font: 500 .95rem var(--font); text-decoration: none; transition: box-shadow .15s, background .15s;
}
.btn-filled { background: var(--primary); color: var(--on-primary); }
.btn-filled:hover { box-shadow: var(--elev-1); }
.btn-tonal { background: var(--primary-container); color: var(--on-primary-container); }
.btn-tonal:hover { box-shadow: var(--elev-1); }
.btn-outlined { border-color: var(--outline); color: var(--primary); background: transparent; }
.btn-outlined:hover { background: var(--surface-2); }
.btn-icon { padding: 0 12px; background: transparent; color: var(--on-surface); font-size: 1.4rem; }

/* Hero */
.hero { background: linear-gradient(180deg, var(--surface-1), var(--surface)); padding: 72px 16px 48px; }
.wrap { max-width: 1100px; margin: 0 auto; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.25rem); line-height: 1.15; margin: 0 0 16px; font-weight: 600; letter-spacing: -.01em; }
.hero p.lead { font-size: 1.2rem; color: var(--on-surface-var); max-width: 720px; margin: 0 0 28px; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero .chip-row { margin-top: 24px; }
.chip {
  display: inline-block; padding: 4px 12px; margin: 0 6px 6px 0; border-radius: 8px;
  border: 1px solid var(--outline); font-size: .85rem; color: var(--on-surface-var);
}
img.shot { cursor: zoom-in; }
.lightbox { position: fixed; inset: 0; z-index: 100; overflow: auto; background: rgba(0,0,0,.85); cursor: zoom-out; padding: 24px; }
.lightbox[hidden] { display: none; }
.lightbox img { display: block; margin: 0 auto; max-width: none; border-radius: 8px; }
.shot { border-radius: var(--radius); box-shadow: var(--elev-2); border: 1px solid var(--outline); }
.hero .shot { margin-top: 40px; width: 100%; }

/* Sections and cards */
section.block { padding: 56px 16px; }
section.alt { background: var(--surface-1); }
section.block h2 { font-size: 1.9rem; margin: 0 0 8px; font-weight: 600; }
section.block .sub { color: var(--on-surface-var); margin: 0 0 32px; max-width: 700px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card {
  background: var(--surface-1); border-radius: var(--radius); padding: 24px;
  border: 1px solid var(--outline);
}
section.alt .card { background: var(--surface); }
.card h3 { margin: 0 0 8px; font-size: 1.1rem; }
.card p { margin: 0; color: var(--on-surface-var); font-size: .95rem; }
.card .icon {
  width: 44px; height: 44px; border-radius: 12px; margin-bottom: 14px;
  display: grid; place-items: center; font-size: 1.4rem;
  background: var(--primary-container); color: var(--on-primary-container);
}
.shots { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.shots figure { margin: 0; }
.shots figcaption { color: var(--on-surface-var); font-size: .9rem; margin-top: 8px; }

/* Doc layout */
.doc { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 40px; max-width: 1100px; margin: 0 auto; padding: 32px 16px 64px; }
.toc { position: sticky; top: 88px; align-self: start; max-height: calc(100vh - 110px); overflow: auto; font-size: .9rem; }
.toc h4 { margin: 0 0 8px; font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: var(--on-surface-var); }
.toc a { display: block; padding: 6px 12px; border-left: 3px solid var(--outline); color: var(--on-surface-var); text-decoration: none; }
.toc a:hover { color: var(--on-surface); }
.toc a.active { border-color: var(--primary); color: var(--primary); font-weight: 600; background: var(--surface-1); }
.toc ~ .content::after { content: ""; display: block; height: 60vh; }
.content h1 { font-size: 2.25rem; margin: 0 0 8px; font-weight: 600; }
.content h2 { font-size: 1.5rem; margin: 48px 0 12px; padding-top: 8px; border-top: 1px solid var(--outline); font-weight: 600; }
.content h2:first-of-type { border-top: 0; margin-top: 32px; }
.content h3 { font-size: 1.15rem; margin: 28px 0 8px; }
.content .lede { color: var(--on-surface-var); font-size: 1.1rem; margin-top: 0; }
.content ul, .content ol { padding-left: 1.4rem; }
.content li { margin: 4px 0; }
code { font-family: var(--mono); font-size: .88em; background: var(--code-bg); padding: 2px 6px; border-radius: 6px; }
pre { position: relative; background: var(--code-bg); padding: 16px; border-radius: 12px; overflow-x: auto; font-size: .88rem; line-height: 1.5; border: 1px solid var(--outline); }
pre code { background: none; padding: 0; font-size: inherit; }
.copy { position: absolute; top: 8px; right: 8px; height: 28px; padding: 0 10px; font-size: .75rem; border-radius: 14px; border: 1px solid var(--outline); background: var(--surface); color: var(--on-surface-var); cursor: pointer; }
.copy:hover { background: var(--surface-2); }
.table-wrap { overflow-x: auto; margin: 16px 0; border: 1px solid var(--outline); border-radius: 12px; }
table { border-collapse: collapse; width: 100%; font-size: .93rem; }
th, td { text-align: left; padding: 10px 14px; vertical-align: top; border-bottom: 1px solid var(--outline); }
th { background: var(--surface-1); font-weight: 600; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
.note { background: var(--primary-container); color: var(--on-primary-container); border-radius: 12px; padding: 14px 18px; margin: 20px 0; }
.note code { background: rgba(255,255,255,.35); }
.note.warn { background: #ffdcc2; color: #3b1c00; }
@media (prefers-color-scheme: dark) { .note.warn { background: #5a3200; color: #ffdcc2; } .note code { background: rgba(0,0,0,.3); } }
.release { background: var(--surface-1); border: 1px solid var(--outline); border-radius: var(--radius); padding: 20px 24px; margin: 16px 0; }
.release h3 { margin: 0 0 4px; }
.release .date { color: var(--on-surface-var); font-size: .9rem; margin: 0 0 8px; }

/* Footer */
footer { background: var(--surface-2); padding: 32px 16px; color: var(--on-surface-var); font-size: .9rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 32px; justify-content: space-between; }
footer a { color: var(--on-surface-var); }

@media (max-width: 860px) {
  .doc { grid-template-columns: 1fr; }
  .toc { display: none; }
  .menu-btn { display: inline-flex; }
  .appbar nav {
    display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column;
    background: var(--surface-1); padding: 8px 16px 16px; box-shadow: var(--elev-2);
  }
  .appbar nav.open { display: flex; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }