:root {
  --bg: #0d0d0f;
  --panel: #1c1c1e;
  --panel-2: #242426;
  --raised: #2c2c2e;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #f2f2f4;
  --text-2: #a1a1a6;
  --text-3: #6e6e73;
  --accent: #5e7bff;
  --accent-soft: rgba(94, 123, 255, 0.18);
  --red: #e5675c;
  --radius: 12px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font: inherit; color: inherit; }

/* ---------- top menu ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 4px;
  height: 52px; padding: 0 16px;
  background: rgba(13, 13, 15, 0.85);
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  border-bottom: 1px solid var(--border);
  overflow-x: auto; scrollbar-width: none;
}
.topbar::-webkit-scrollbar { display: none; }
.topbar a {
  flex: none;
  padding: 6px 12px; border-radius: 8px;
  color: var(--text-2); font-weight: 500; white-space: nowrap;
}
.topbar a:hover { color: var(--text); background: var(--panel); text-decoration: none; }
.topbar a.active { color: var(--text); }
.topbar a.brand { color: var(--text); font-weight: 650; margin-right: 8px; }

/* ---------- home ---------- */
.home {
  min-height: calc(100vh - 52px);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 36px; padding: 48px 16px;
}
.home .shot {
  width: min(1100px, 100%); height: auto; display: block;
}
.home .policy { color: var(--text-2); font-size: 14px; margin-top: max(-56px, -5vw); }
.home .policy:hover { color: var(--text); }
.links { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: 999px;
  background: var(--panel); border: 1px solid var(--border-strong);
  color: var(--text); font-weight: 500; cursor: pointer;
}
.btn:hover { background: var(--raised); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: transparent; color: #fff; }
.btn.primary:hover { background: #7088ff; }

/* ---------- docs ---------- */
.doc { max-width: 760px; margin: 0 auto; padding: 48px 16px 96px; color: #d8d8dc; }
.doc h1, .doc h2, .doc h3 { color: var(--text); line-height: 1.25; }
.doc h1 { font-size: 32px; margin: 0 0 8px; }
.doc h2 { font-size: 22px; margin: 44px 0 12px; padding-top: 20px; border-top: 1px solid var(--border); }
.doc h3 { font-size: 17px; margin: 28px 0 8px; }
.doc .lead { color: var(--text-2); margin: 0 0 28px; }
.doc img { width: auto; max-width: 100%; height: auto; border-radius: 10px; margin: 12px 0; box-shadow: 0 0 0 1px var(--border); }
.doc code { background: var(--panel); padding: 1px 6px; border-radius: 5px; font-size: 0.92em; }
.doc li { margin: 6px 0; }
.doc .note {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 18px; margin: 20px 0;
}

@media (max-width: 480px) {
  .topbar { padding: 0 8px; gap: 0; }
  .topbar a { padding: 6px 8px; font-size: 14px; }
  .topbar a.brand { margin-right: 0; }
}

/* ---------- handbook ---------- */
.doc.wide { max-width: 980px; }
.doc .crumbs { color: var(--text-3); font-size: 13px; margin: 0 0 6px; }
.doc .crumbs a { color: var(--text-2); }
.doc kbd {
  display: inline-block; min-width: 1.6em; padding: 0 5px; text-align: center;
  background: var(--raised); border: 1px solid var(--border-strong); border-bottom-width: 2px;
  border-radius: 5px; font: 12px/1.6 -apple-system, BlinkMacSystemFont, sans-serif; color: var(--text);
}
.doc .badge {
  font-size: 10px; font-weight: 700; letter-spacing: .04em; padding: 1px 5px; border-radius: 4px;
  background: var(--raised); color: var(--text-2);
}
.doc figure { margin: 16px 0 20px; }
.doc figure img { margin: 0; }
.doc figcaption { color: var(--text-3); font-size: 13px; margin-top: 6px; }
.doc figure.todo div {
  border: 1px dashed var(--border-strong); border-radius: 10px; padding: 28px 18px;
  color: var(--text-3); font-size: 13px; text-align: center; background: var(--panel);
}
.doc ol.steps > li { margin: 10px 0; }
.doc table { width: 100%; border-collapse: collapse; margin: 12px 0 20px; }
.doc th, .doc td { text-align: left; vertical-align: top; padding: 10px 12px; border-top: 1px solid var(--border); }
.doc th { color: var(--text); font-weight: 600; width: 30%; }
.doc th small { color: var(--text-3); font-weight: 400; }
.doc table.syntax td:first-child { width: 34%; white-space: nowrap; }
.doc dl.parts dt { color: var(--text); font-weight: 600; margin-top: 14px; }
.doc dl.parts dd { margin: 4px 0 0; }
.doc .note.warn { border-color: rgba(229, 103, 92, 0.45); }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.card {
  display: flex; flex-direction: column; gap: 4px; padding: 16px 18px;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text-2);
}
.card b { color: var(--text); font-weight: 600; }
.card span { font-size: 14px; }
.card:hover { background: var(--panel-2); border-color: var(--border-strong); text-decoration: none; }

.handbook { display: flex; justify-content: center; gap: 8px; }
.handbook .doc { flex: 1; min-width: 0; margin: 0; }
.toc {
  flex: none; width: 230px; position: sticky; top: 52px; align-self: flex-start;
  max-height: calc(100vh - 52px); overflow-y: auto; padding: 40px 8px 40px 16px; font-size: 14px;
}
.toc .toc-home { color: var(--text); font-weight: 650; }
.toc h4 { color: var(--text-3); font-size: 11px; text-transform: uppercase; letter-spacing: .06em; margin: 20px 0 6px; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li a { display: block; padding: 4px 8px; margin-left: -8px; border-radius: 6px; color: var(--text-2); }
.toc li a:hover { background: var(--panel); color: var(--text); text-decoration: none; }
.toc li a.here { background: var(--accent-soft); color: var(--text); }

.pager { display: flex; gap: 12px; margin-top: 48px; }
.pager a {
  flex: 1; display: flex; flex-direction: column; padding: 12px 16px;
  border: 1px solid var(--border); border-radius: var(--radius); color: var(--text);
}
.pager a small { color: var(--text-3); }
.pager a.next { text-align: right; }
.pager a:hover { background: var(--panel); text-decoration: none; }

@media (max-width: 900px) {
  .toc { display: none; }
}
/* Window screenshots carry their own transparent margin and shadow. */
.doc figure img { box-shadow: none; border-radius: 0; }
/* The screenshot's bottom ~6% is transparent shadow margin; pull what follows up over it. */
.doc figure.hero { margin-bottom: -3%; }
.doc .links { margin: 0 0 28px; }