/* Docs page and diagram kit (from dliu-com/traffic-monitor, light only). */
:root {
  --dg-bg: #f7f9fa; --dg-card: #fff; --dg-border: #c9d3d9; --dg-frame: #d9dfe2; --dg-soft: #e6ebed;
  --dg-text: #202629; --dg-muted: #52636c; --dg-arrow: #7b8a93;
  --dg-untrusted-bg: #fdf1f0; --dg-untrusted-line: #e39a96;
  --dg-edge-bg: #f4effe; --dg-edge-line: #bfa3f5;
  --dg-private-bg: #f1f8f3; --dg-private-line: #7fb895;
  --dg-app-bg: #fff6ec; --dg-app-line: #efb67e;
  --dg-warn-bg: #fdf7ea; --dg-warn-line: #e2b765;
}

main.docs-main { max-width: 1040px; }
.docs { max-width: 980px; font-size: 15px; line-height: 1.6; }
.docs h1 { margin: 0 0 4px; }
.docs h2 { font-size: 1.35rem; margin: 2.2rem 0 .5rem; }
.docs h2:first-child { margin-top: .5rem; }
.docs h3 { font-size: 1.05rem; margin: 1.4rem 0 .4rem; }
.docs .lead { font-size: 1.05rem; }
.docs ul { padding-left: 1.3rem; }
.docs li { margin: .3rem 0; }
.docs code { font-size: .9em; padding: .05rem .3rem; border-radius: 4px; background: var(--dg-soft); overflow-wrap: anywhere; }
.docs .source { margin: 2.5rem 0 1rem; color: var(--muted); font-size: 13px; }

.dg { margin: 22px 0; padding: 20px; border: 1px solid var(--dg-frame); border-radius: 12px; background: var(--dg-bg); }
.dg figcaption { font: 650 17px/1.3 system-ui, sans-serif; margin: 0 0 16px; color: var(--dg-text); }
.dg-note { font-size: 13px; line-height: 1.55; color: var(--dg-muted) !important; margin: 14px 0 0; }
.dg-icon { display: inline-flex; align-items: center; justify-content: center; flex: none; width: 40px; height: 40px; border-radius: 10px; background: var(--dg, #4b6575); box-shadow: inset 0 -3px 0 #0000001f; }
.dg-icon svg { width: 26px; height: 26px; fill: none; stroke: #fff; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.dg-text { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.dg-text strong { font: 650 14px/1.3 system-ui, sans-serif; color: var(--dg-text); }
.dg-text small { font: 12.5px/1.45 system-ui, sans-serif; color: var(--dg-muted); }

.dg-flow { display: flex; align-items: stretch; }
.dg-step { position: relative; flex: 1 1 0; min-width: 0; display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 14px 8px; text-align: center; background: var(--dg-card); border: 1px solid var(--dg-border); border-radius: 10px; }
.dg-step .dg-text { align-items: center; }
.dg-arrow { flex: 0 0 24px; display: flex; align-items: center; justify-content: center; color: var(--dg-arrow); }
.dg-arrow svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.dg-num { position: absolute; top: 6px; left: 6px; display: grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; background: var(--dg-soft); color: var(--dg-text); font: 650 11px system-ui, sans-serif; }
.dg-good { border-color: var(--dg-private-line); background: var(--dg-private-bg); }
.dg-warn { border-color: var(--dg-warn-line); background: var(--dg-warn-bg); }
.dg-bad { border-color: var(--dg-untrusted-line); background: var(--dg-untrusted-bg); }

.dg-tier { display: grid; grid-template-columns: 128px minmax(0, 1fr); gap: 12px; align-items: center; padding: 10px; border: 1px dashed transparent; border-radius: 10px; }
.dg-tier-label { display: flex; flex-direction: column; gap: 4px; }
.dg-tier-label strong { font: 650 13px/1.3 system-ui, sans-serif; color: var(--dg-text); }
.dg-badge { align-self: flex-start; font: 650 10.5px/1 system-ui, sans-serif; letter-spacing: .4px; text-transform: uppercase; padding: 4px 6px; border-radius: 4px; background: var(--dg-soft); color: var(--dg-text); }
.dg-tier-nodes { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 10px; }
.dg-node { display: flex; align-items: center; gap: 10px; min-width: 0; padding: 10px; background: var(--dg-card); border: 1px solid var(--dg-border); border-radius: 10px; }
.dg-link { display: flex; align-items: center; gap: 6px; margin: 2px 0 2px 150px; color: var(--dg-arrow); font: 12px/1.3 system-ui, sans-serif; }
.dg-link .dg-arrow { flex-basis: 18px; transform: rotate(90deg); }
.dg-untrusted { background: var(--dg-untrusted-bg); border-color: var(--dg-untrusted-line); }
.dg-untrusted .dg-badge { background: #d33c36; color: #fff; }
.dg-edge { background: var(--dg-edge-bg); border-color: var(--dg-edge-line); }
.dg-edge .dg-badge { background: #8c4fff; color: #fff; }
.dg-private { background: var(--dg-private-bg); border-color: var(--dg-private-line); }
.dg-private .dg-badge { background: #2e8540; color: #fff; }
.dg-app { background: var(--dg-app-bg); border-color: var(--dg-app-line); }
.dg-app .dg-badge { background: #d45b07; color: #fff; }

.dg-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 10px; margin: 18px 0; }
.dg-stat { display: flex; align-items: center; gap: 10px; padding: 12px; background: var(--dg-card); border: 1px solid var(--dg-frame); border-radius: 10px; }
.dg-stat .dg-text strong { font-size: 16px; }

.docs .table-wrap { overflow-x: auto; margin: 12px 0 18px; border: 1px solid var(--dg-frame); border-radius: 10px; background: var(--dg-card); }
.docs table { width: 100%; border-collapse: collapse; font-size: 14px; }
.docs th, .docs td { text-align: left; vertical-align: top; padding: 8px 12px; border-bottom: 1px solid var(--dg-soft); }
.docs th { font-weight: 650; background: var(--dg-bg); }
.docs tr:last-child td { border-bottom: 0; }
.docs td.num { white-space: nowrap; font-variant-numeric: tabular-nums; }
.docs td.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; white-space: nowrap; }
.docs .status { white-space: nowrap; font-weight: 650; color: #2e8540; }
.docs .risk-low { color: #2e8540; font-weight: 650; }
.docs .risk-medium { color: #b26b00; font-weight: 650; }

.dg-callout { display: flex; align-items: center; gap: 12px; margin: 18px 0; padding: 12px 14px; border: 1px solid var(--dg-warn-line); border-radius: 10px; background: var(--dg-warn-bg); font-size: 14px; line-height: 1.5; }
.dg-more { margin: 24px 0; border: 1px solid var(--dg-frame); border-radius: 10px; background: var(--dg-card); }
.dg-more > summary { cursor: pointer; padding: 14px 18px; font: 650 15px system-ui, sans-serif; }
.dg-more[open] > summary { border-bottom: 1px solid var(--dg-soft); }
.dg-more > div { padding: 0 18px 12px; }

/* Tabs between the three sections. */
.info-tabs { display: flex; gap: 2px; overflow-x: auto; scrollbar-width: none; max-width: 980px; margin: 4px 0 18px; border-bottom: 1px solid var(--line); }
.info-tabs::-webkit-scrollbar { display: none; }
.info-tabs a { flex: none; padding: 9px 14px; color: var(--muted); font-weight: 600; font-size: 15px; text-decoration: none; border-bottom: 3px solid transparent; margin-bottom: -1px; }
.info-tabs a:hover { color: var(--accent); text-decoration: none; }
.info-tabs a[aria-current="page"] { color: var(--text); border-bottom-color: var(--accent); }

@media (max-width: 640px) {
  .docs { font-size: 14.5px; }
  .dg { padding: 14px; }
  .dg-flow { flex-direction: column; }
  .dg-step { flex-direction: row; align-items: center; text-align: left; gap: 12px; padding: 10px 12px 10px 36px; }
  .dg-step .dg-text { align-items: flex-start; }
  .dg-step .dg-num { top: 50%; transform: translateY(-50%); left: 8px; }
  .dg-step:not(:has(.dg-num)) { padding-left: 12px; }
  .dg-flow > .dg-arrow { flex-basis: 20px; transform: rotate(90deg); }
  .dg-tier { grid-template-columns: 1fr; gap: 8px; }
  .dg-tier-label { flex-direction: row; align-items: center; gap: 8px; }
  .dg-link { margin: 2px 0; justify-content: center; }
  .dg-tier-nodes { grid-template-columns: 1fr; }
  .info-tabs a { padding: 8px 10px; font-size: 14px; }
  .docs th, .docs td { padding: 7px 9px; }
}

.docs pre.code { margin: 12px 0 18px; padding: 12px 14px; overflow-x: auto; border: 1px solid var(--dg-frame); border-radius: 10px; background: var(--dg-bg); font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; white-space: pre; }