:root {
  --bg: #f7f7f8; --panel: #fff; --text: #18181b; --muted: #71717a; --line: #e4e4e7; --hover: #f1f1f3;
  --accent: #2563eb; --ok: #15803d; --ok-bg: #dcfce7; --info: #1d4ed8; --info-bg: #dbeafe;
  --warn: #b45309; --warn-bg: #fef3c7; --err: #dc2626; --err-bg: #fee2e2; --code: #f4f4f5;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f0f11; --panel: #18181b; --text: #f4f4f5; --muted: #a1a1aa; --line: #2e2e33; --hover: #232327;
    --accent: #60a5fa; --ok: #4ade80; --ok-bg: #153d24; --info: #93c5fd; --info-bg: #1e3a5f;
    --warn: #fbbf24; --warn-bg: #4a3510; --err: #f87171; --err-bg: #4c1d1d; --code: #27272a; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--accent); text-decoration: none; } a:hover { text-decoration: underline; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }
code { background: var(--code); padding: 1px 5px; border-radius: 5px; }
pre { background: var(--code); padding: 12px; border-radius: 8px; overflow: auto; } pre code { padding: 0; background: none; }
.app { display: grid; grid-template-columns: 300px minmax(0, 1fr); min-height: 100vh; }
aside { background: var(--panel); border-right: 1px solid var(--line); position: sticky; top: 0; height: 100vh; overflow: auto; padding-bottom: 32px; }
.brand { display: flex; justify-content: space-between; align-items: center; padding: 14px 16px 8px; font-weight: 650; }
.brand a { color: var(--text); } .close, .menu { display: none; }
.search { width: calc(100% - 24px); margin: 4px 12px 10px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--text); font: inherit; }
nav a { display: block; color: var(--text); padding: 5px 16px; font-size: 13.5px; }
nav a:hover { background: var(--hover); text-decoration: none; }
nav a.active { background: var(--info-bg); }
.nav-top { font-weight: 550; } .nav-label { margin: 14px 16px 4px; font: 600 11px system-ui; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.nav-mod summary { padding: 5px 12px; cursor: pointer; font-size: 13.5px; font-weight: 550; list-style: none; }
.nav-mod summary::before { content: "▸ "; color: var(--muted); } .nav-mod[open] summary::before { content: "▾ "; }
.nav-mod summary a { display: inline; padding: 0; }
.nav-doc { padding-left: 30px !important; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.nav-doc .id { color: var(--muted); font: 12px ui-monospace, monospace; }
.n { float: right; color: var(--muted); font-weight: 400; } .n-warn { color: var(--warn); }
main { padding: 28px 40px 40px; max-width: 1100px; width: 100%; }
h1 { margin: 2px 0 12px; font-size: 26px; line-height: 1.3; } h2 { margin: 30px 0 10px; font-size: 18px; } h3 { font-size: 15px; margin: 18px 0 6px; }
.kicker { font: 600 12px system-ui; letter-spacing: .06em; color: var(--muted); }
.crumbs { font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.muted { color: var(--muted); font-size: .92em; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 4px 20px; margin: 12px 0; }
.body img { max-width: 100%; } .body table { border-collapse: collapse; margin: 10px 0; display: block; overflow-x: auto; }
.body th, .body td, .tbl th, .tbl td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; vertical-align: top; }
.tbl { overflow-x: auto; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; }
.tbl table { border-collapse: collapse; width: 100%; } .tbl th { background: var(--hover); font-size: 13px; } .tbl th, .tbl td { border-width: 0 0 1px 0; }
.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; margin: 14px 0; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; color: var(--text); }
.stat:hover { text-decoration: none; } .sn { font-size: 24px; font-weight: 700; } .sl { color: var(--muted); font-size: 13px; }
.c-warn { color: var(--warn); } .c-ok { color: var(--ok); }
.badges { display: flex; flex-wrap: wrap; gap: 6px 14px; margin: 6px 0 12px; font-size: 13px; }
.badge { display: inline-block; font: 600 12px system-ui; padding: 1px 8px; border-radius: 999px; background: var(--hover); color: var(--muted); }
.t-ok { background: var(--ok-bg); color: var(--ok); } .t-info { background: var(--info-bg); color: var(--info); }
.t-warn { background: var(--warn-bg); color: var(--warn); } .t-err { background: var(--err-bg); color: var(--err); }
.qbox { border: 1px solid var(--warn); background: var(--warn-bg); border-radius: 12px; padding: 10px 16px; margin: 12px 0; }
.qh { font-weight: 650; color: var(--warn); margin-bottom: 4px; }
.qi { padding: 5px 0; border-top: 1px dashed color-mix(in srgb, var(--warn) 40%, transparent); } .qi:first-of-type { border-top: 0; }
.qi.done { opacity: .75; }
.ans { color: var(--ok); margin-top: 2px; }
.doc h1, .doc h2 { font-size: 17px; } .doc table { font-size: 13px; }
.q { color: var(--warn); font-weight: 700; font-size: 12px; } .w { color: var(--warn); font-size: 12px; }
.issues { margin: 10px 0; display: grid; gap: 6px; }
.issue { padding: 7px 12px; border-radius: 8px; font-size: 13.5px; background: var(--warn-bg); }
.issue.l-error { background: var(--err-bg); } .issue.l-info { background: var(--hover); }
.issue .muted { display: block; font-size: 12px; }
.tree ul { margin: 2px 0 8px; } .tree li { margin: 3px 0; }
.inp .ih { display: flex; flex-wrap: wrap; gap: 6px 10px; align-items: baseline; padding: 10px 0 4px; }
.inp details { margin: 6px 0 12px; } .inp summary { cursor: pointer; color: var(--accent); }
footer { margin-top: 40px; color: var(--muted); font-size: 12.5px; }
@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; }
  aside { position: fixed; inset: 0 25% 0 0; z-index: 10; transform: translateX(-105%); transition: transform .2s; box-shadow: 0 0 40px #0005; }
  body.nav-open aside { transform: none; }
  .close, .menu { display: inline-block; background: var(--panel); color: var(--text); border: 1px solid var(--line); border-radius: 8px; padding: 5px 10px; font: inherit; }
  .menu { margin-bottom: 12px; }
  main { padding: 16px; }
  h1 { font-size: 22px; }
}