:root {
  --bg: #0c121a;
  --bg-1: #11171f;
  --panel: #161d28;
  --panel-2: #1d2632;
  --line: #1f2733;
  --line-2: #2c3645;
  --ink: #d6dde7;
  --ink-2: #afb8c5;
  --dim: #6b7689;
  --mute: #4a5366;
  --acc: #5fb6ff;
  --acc-2: #84c8ff;
  --gold: #e0b552;
  --green: #5fd29e;
  --red: #e57373;
  --sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --serif: 'Source Serif Pro', 'Charter', Georgia, 'Times New Roman', serif;
  --mono: ui-monospace, 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); font-size: 15.5px; line-height: 1.7; -webkit-font-smoothing: antialiased; }
body { min-height: 100vh; }
::selection { background: var(--acc); color: #04101e; }
a { color: var(--acc); text-decoration: none; }
a:hover { color: var(--acc-2); text-decoration: underline; text-underline-offset: 2px; }
b, strong { color: #fff; font-weight: 700; }

.topnav { border-bottom: 1px solid var(--line); background: rgba(12,18,26,0.92); backdrop-filter: blur(8px); position: sticky; top: 0; z-index: 50; }
.topnav-in { max-width: 1280px; margin: 0 auto; padding: 14px 26px; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); }
.brand img { border-radius: 6px; }
.brand span { font-weight: 700; font-size: 16px; letter-spacing: -0.2px; color: #fff; }
.brand em { color: var(--acc); font-style: italic; font-weight: 500; }
.search { font-family: var(--mono); font-size: 11.5px; color: var(--dim); padding: 5px 12px; border: 1px solid var(--line-2); border-radius: 6px; }

.layout { max-width: 1280px; margin: 0 auto; padding: 32px 26px 56px; display: grid; grid-template-columns: 240px 1fr; gap: 40px; }

.sidebar { position: sticky; top: 78px; align-self: start; }
.sidebar nav { display: flex; flex-direction: column; gap: 18px; }
.navgroup { display: flex; flex-direction: column; gap: 2px; }
.grouph { font-family: var(--mono); font-size: 11px; letter-spacing: 2px; text-transform: uppercase; color: var(--dim); padding: 4px 10px 8px; }
.sidebar a { color: var(--ink-2); padding: 7px 12px; border-left: 2px solid transparent; font-size: 14px; transition: all .12s; }
.sidebar a:hover { color: var(--acc); text-decoration: none; }
.sidebar a.active { color: var(--acc); border-color: var(--acc); background: linear-gradient(90deg, rgba(95,182,255,0.08), transparent 80%); }

.content { max-width: 760px; min-width: 0; }
.crumbs { font-family: var(--mono); font-size: 11.5px; color: var(--dim); margin-bottom: 12px; letter-spacing: 0.5px; }
.crumbs a { color: var(--ink-2); }
.crumbs .sep { padding: 0 6px; color: var(--mute); }

h1 { font-family: var(--serif); font-size: 38px; line-height: 1.15; letter-spacing: -0.5px; margin: 0 0 8px; color: #fff; font-weight: 700; }
.lead { font-family: var(--serif); font-size: 18px; line-height: 1.6; color: var(--ink-2); margin: 0 0 32px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.lead b { color: var(--acc); }

h2 { font-family: var(--sans); font-size: 22px; font-weight: 700; margin: 36px 0 8px; color: #fff; letter-spacing: -0.2px; }
h2 .anchor { color: var(--mute); font-weight: 400; margin-right: 10px; }
h3 { font-family: var(--sans); font-size: 17px; font-weight: 700; margin: 22px 0 6px; color: #fff; }

p { margin: 0 0 14px; color: var(--ink); }
p b { color: var(--acc-2); }
p i, em { font-style: normal; color: var(--gold); }
p code, .pre code { font-family: var(--mono); font-size: 13px; padding: 1px 6px; background: var(--panel); border: 1px solid var(--line-2); border-radius: 4px; color: var(--gold); }
ul, ol { padding-left: 22px; margin: 0 0 14px; }
ul li::marker, ol li::marker { color: var(--acc); }
ul li, ol li { margin: 4px 0; }
li b { color: #fff; }

.callout { margin: 18px 0; padding: 14px 18px; border-left: 3px solid var(--acc); background: rgba(95,182,255,0.05); border-radius: 0 6px 6px 0; color: var(--ink); font-size: 14.5px; }
.callout.warn { border-color: var(--gold); background: rgba(224,181,82,0.05); }
.callout.danger { border-color: var(--red); background: rgba(229,115,115,0.05); }
.callout b { color: var(--acc); text-transform: uppercase; letter-spacing: 1px; font-size: 12px; margin-right: 8px; }
.callout.warn b { color: var(--gold); }
.callout.danger b { color: var(--red); }

.pre { background: var(--bg-1); border: 1px solid var(--line-2); border-radius: 8px; padding: 14px 18px; margin: 14px 0; overflow-x: auto; }
.pre pre { margin: 0; font-family: var(--mono); font-size: 13px; color: var(--ink); line-height: 1.6; }
.pre pre .c { color: var(--dim); }
.pre pre .k { color: var(--green); }

.kv-table { width: 100%; border-collapse: collapse; margin: 14px 0; }
.kv-table th, .kv-table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); font-size: 14px; }
.kv-table th { color: var(--dim); font-weight: 600; font-family: var(--mono); font-size: 11.5px; letter-spacing: 1px; text-transform: uppercase; background: var(--panel); width: 200px; }
.kv-table td { color: var(--ink); }
.kv-table td b { color: var(--acc-2); }

.mirror-table { display: flex; flex-direction: column; gap: 10px; margin: 16px 0; }
.mirror-table .row { padding: 14px 18px; background: var(--panel); border: 1px solid var(--line-2); border-radius: 8px; display: grid; grid-template-columns: 30px 1fr auto; gap: 14px; align-items: center; }
.mirror-table .row .num { font-family: var(--mono); color: var(--gold); font-weight: 700; font-size: 14px; }
.mirror-table .row .url { font-family: var(--mono); font-size: 12.5px; word-break: break-all; color: var(--ink); }
.mirror-table .row .url .s { color: var(--acc); }
.mirror-table .row button { background: var(--acc); color: #04101e; border: 1px solid var(--acc); padding: 8px 14px; border-radius: 6px; font-family: var(--sans); font-weight: 700; font-size: 12.5px; cursor: pointer; transition: all .12s; }
.mirror-table .row button:hover { background: var(--acc-2); border-color: var(--acc-2); }
.mirror-table .row button.ok { background: var(--green); border-color: var(--green); }

.qa { margin: 16px 0; }
.qa details { padding: 12px 0; border-bottom: 1px solid var(--line); }
.qa summary { cursor: pointer; list-style: none; font-weight: 700; color: #fff; outline: none; display: flex; justify-content: space-between; gap: 14px; align-items: center; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: "+"; color: var(--acc); font-size: 20px; font-weight: 400; }
.qa details[open] summary::after { content: "\2212"; }
.qa .ans { margin-top: 8px; color: var(--ink-2); font-size: 14.5px; }
.qa .ans b { color: var(--ink); }

.glossary-list { margin: 16px 0 0; }
.glossary-list dt { font-family: var(--sans); font-weight: 700; color: var(--acc); font-size: 16px; margin-top: 18px; }
.glossary-list dd { margin: 4px 0 0; color: var(--ink-2); font-size: 14.5px; }
.glossary-list dd b { color: #fff; }

.kw-strip { margin-top: 28px; padding: 14px 18px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); display: flex; flex-wrap: wrap; gap: 6px; }
.kw-strip span { font-family: var(--mono); font-size: 11.5px; padding: 4px 10px; border-radius: 999px; background: var(--bg); border: 1px solid var(--line-2); color: var(--ink-2); }
.kw-strip span:hover { color: var(--acc); border-color: var(--acc); }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 40px 0 0; }
.pager a { padding: 16px 20px; border: 1px solid var(--line-2); border-radius: 10px; background: var(--panel); transition: all .15s; display: block; }
.pager a:hover { border-color: var(--acc); text-decoration: none; }
.pager a span { display: block; font-family: var(--mono); font-size: 11.5px; color: var(--dim); letter-spacing: 0.5px; margin-bottom: 4px; }
.pager a b { display: block; color: #fff; font-weight: 700; font-size: 15px; }
.pager .next { text-align: right; }

.bot { border-top: 1px solid var(--line); margin-top: 0; padding: 18px 26px; background: var(--bg-1); }
.bot-in { max-width: 1280px; margin: 0 auto; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; font-family: var(--mono); font-size: 11px; color: var(--dim); }

@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; gap: 24px; }
  .sidebar { position: static; }
  .sidebar nav { flex-direction: row; flex-wrap: wrap; gap: 8px; }
  .navgroup { flex-direction: row; flex-wrap: wrap; gap: 4px; }
  .grouph { width: 100%; padding: 0 0 4px; }
  .sidebar a { padding: 6px 12px; border: 1px solid var(--line-2); border-radius: 6px; font-size: 13px; }
  .sidebar a.active { border-color: var(--acc); background: rgba(95,182,255,0.1); }
}
@media (max-width: 600px) {
  html, body { font-size: 14.5px; }
  .topnav-in { padding: 12px 16px; }
  .search { display: none; }
  .layout { padding: 22px 16px 40px; }
  h1 { font-size: 28px; }
  .lead { font-size: 16px; }
  h2 { font-size: 18px; }
  .mirror-table .row { grid-template-columns: 1fr; gap: 8px; }
  .mirror-table .row .url { font-size: 11px; }
  .mirror-table .row button { width: 100%; padding: 12px; min-height: 44px; -webkit-tap-highlight-color: transparent; }
  .pager { grid-template-columns: 1fr; }
  .pager .next { text-align: left; }
  .kv-table th { font-size: 10.5px; width: 140px; }
}
@media (hover: none) {
  .mirror-table .row button:hover { background: var(--acc); border-color: var(--acc); }
  .mirror-table .row button:active, .mirror-table .row button.ok { background: var(--green); border-color: var(--green); }
}