/* Concord Docs — shared design system. No build step; linked from every /docs page. */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --navy: #0f3460; --navy-d: #16213e; --ink: #1a1a2e; --coral: #e94560;
  --text: #333; --muted: #666; --faint: #8a93a7; --line: #e6e9f0; --bg: #fff; --code-bg: #1a1a2e;
  --sidebar-w: 250px; --nav-h: 56px;
}
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; color: var(--text); line-height: 1.7; background: var(--bg); }

/* ---- Top nav (shared with the site) ---- */
.dnav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(26,26,46,0.96); backdrop-filter: blur(8px); height: var(--nav-h); display: flex; align-items: center; justify-content: space-between; padding: 0 22px; }
.dnav .logo { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; font-size: 16px; text-decoration: none; }
.dnav .logo img { height: 26px; border-radius: 6px; }
.dnav .links { display: flex; gap: 22px; align-items: center; }
.dnav .links a { color: #aaa; text-decoration: none; font-size: 14px; transition: color .2s; }
.dnav .links a:hover, .dnav .links a.on { color: #fff; }
.dnav .btn { background: var(--coral); color: #fff !important; padding: 6px 16px; border-radius: 6px; font-weight: 600; }
.dnav .btn:hover { background: #d63852; }
.dnav .burger { display: none; background: none; border: 0; color: #fff; font-size: 22px; cursor: pointer; padding: 4px 8px; }

/* ---- Layout: sidebar + content ---- */
.dwrap { display: flex; max-width: 1200px; margin: 0 auto; padding-top: var(--nav-h); }
aside.dside { width: var(--sidebar-w); flex-shrink: 0; position: sticky; top: var(--nav-h); align-self: flex-start; height: calc(100vh - var(--nav-h)); overflow-y: auto; padding: 28px 12px 40px 24px; border-right: 1px solid var(--line); }
aside.dside .grp { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 1.5px; color: var(--faint); margin: 22px 0 8px; }
aside.dside .grp:first-child { margin-top: 0; }
aside.dside a { display: block; color: #555; text-decoration: none; font-size: 14px; padding: 6px 12px; border-radius: 7px; transition: background .12s, color .12s; }
aside.dside a:hover { background: #f3f5fa; color: var(--ink); }
aside.dside a.on { background: #eef2fb; color: var(--navy); font-weight: 600; }

main.dmain { flex: 1; min-width: 0; padding: 40px 48px 96px; max-width: 820px; }
main.dmain .crumb { font-size: 13px; color: var(--faint); margin-bottom: 10px; }
main.dmain .crumb a { color: var(--navy); text-decoration: none; }
main.dmain h1 { font-size: 34px; font-weight: 800; line-height: 1.2; color: var(--ink); margin-bottom: 12px; }
main.dmain .lead { font-size: 18px; color: var(--muted); margin-bottom: 32px; }
main.dmain h2 { font-size: 24px; font-weight: 700; color: var(--ink); margin: 44px 0 14px; padding-top: 8px; scroll-margin-top: 72px; }
main.dmain h3 { font-size: 18px; font-weight: 700; color: var(--ink); margin: 28px 0 8px; scroll-margin-top: 72px; }
main.dmain p { margin: 0 0 14px; }
main.dmain ul, main.dmain ol { margin: 0 0 16px; padding-left: 22px; }
main.dmain li { margin-bottom: 7px; }
main.dmain a { color: var(--navy); }
main.dmain strong { color: var(--ink); }
main.dmain code { background: #eef0f4; color: #1f2a4a; padding: 2px 6px; border-radius: 4px; font-size: 0.88em; font-family: 'SF Mono', Monaco, Menlo, monospace; }
main.dmain pre { background: var(--code-bg); color: #e0e0e0; padding: 16px 18px; border-radius: 10px; overflow-x: auto; margin: 6px 0 18px; font-size: 13.5px; line-height: 1.65; }
main.dmain pre code { background: none; padding: 0; color: inherit; }
main.dmain pre .c { color: #6b7794; }      /* comment */
main.dmain pre .g { color: #7ee787; }      /* green / command */
main.dmain pre .y { color: #ffd479; }      /* keyword */

/* Callout */
.note { background: #f7f9fc; border: 1px solid var(--line); border-left: 4px solid var(--navy); border-radius: 8px; padding: 14px 18px; margin: 18px 0; }
.note.coral { border-left-color: var(--coral); }
.note.warn { border-left-color: #e0a800; background: #fffdf5; }
.note .l { display: block; font-weight: 700; color: var(--ink); margin-bottom: 4px; font-size: 14px; }
.note p { font-size: 14px; color: #555; margin: 0; }

/* Command reference row */
.cmd { border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; margin: 12px 0; }
.cmd .sig { font-family: 'SF Mono', Monaco, Menlo, monospace; font-size: 14px; color: var(--navy); font-weight: 700; margin-bottom: 6px; }
.cmd .sig .opt { color: var(--faint); font-weight: 400; }
.cmd p { font-size: 14px; color: #555; margin: 0; }

/* Cards (docs home) */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; margin: 8px 0 20px; }
.card { display: block; border: 1px solid var(--line); border-radius: 12px; padding: 20px; text-decoration: none; color: inherit; transition: transform .12s, box-shadow .12s, border-color .12s; }
.card:hover { transform: translateY(-3px); box-shadow: 0 10px 26px rgba(15,52,96,.1); border-color: #cfd8ea; }
.card .ico { font-size: 22px; margin-bottom: 8px; }
.card .t { font-weight: 700; color: var(--ink); margin-bottom: 4px; }
.card .d { font-size: 13.5px; color: var(--muted); line-height: 1.5; }

/* Table */
.dtable { width: 100%; border-collapse: collapse; margin: 8px 0 20px; font-size: 14px; }
.dtable th, .dtable td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.dtable th { background: #f5f7fb; font-weight: 600; color: var(--ink); }
.dtable td code { font-size: 12.5px; }

/* Prev / next */
.pn { display: flex; justify-content: space-between; gap: 16px; margin-top: 56px; padding-top: 22px; border-top: 1px solid var(--line); }
.pn a { flex: 1; border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px; text-decoration: none; color: var(--ink); transition: border-color .12s, background .12s; }
.pn a:hover { border-color: #cfd8ea; background: #f7f9fc; }
.pn a.next { text-align: right; }
.pn a .k { display: block; font-size: 12px; color: var(--faint); margin-bottom: 3px; }
.pn a .v { font-weight: 700; font-size: 15px; }

/* Backdrop for mobile sidebar */
.dback { display: none; position: fixed; inset: var(--nav-h) 0 0 0; background: rgba(0,0,0,.35); z-index: 90; }

@media (max-width: 900px) {
  .dnav .links a:not(.btn) { display: none; }
  .dnav .burger { display: block; }
  aside.dside { position: fixed; top: var(--nav-h); left: 0; bottom: 0; z-index: 95; background: #fff; transform: translateX(-100%); transition: transform .2s ease; box-shadow: 2px 0 16px rgba(0,0,0,.08); }
  body.dopen aside.dside { transform: none; }
  body.dopen .dback { display: block; }
  main.dmain { padding: 32px 22px 80px; }
  .pn { flex-direction: column; }
}