/*
 * dliu.com shared docs styles, v1: https://files.dliu.com/dliu.com/ui/v1/dl-docs.css
 * Source: https://github.com/dliu-com/shared-resources (public/ui/v1/dl-docs.css)
 *
 * For Docs / About / How it works pages only, loaded after dl.css:
 *   <main class="dl-main dl-docs-main"> <nav class="dl-tabs">…</nav> <article class="dl-docs">…</article> </main>
 * dl-docs styles the article text, tables and code; the dg-* classes are the diagram kit that each
 * site's diagram script builds (stats, flows, architecture tiers, callouts). 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;
}

.dl-main.dl-docs-main { max-width: 1040px; }
.dl-docs [id] { scroll-margin-top: 84px; }
.dl-docs { max-width: 980px; font-size: 15px; line-height: 1.6; }
.dl-docs h1 { margin: 0 0 4px; }
.dl-docs h2 { font-size: 1.35rem; margin: 2.2rem 0 .5rem; }
.dl-docs h2:first-child { margin-top: .5rem; }
.dl-docs h3 { font-size: 1.05rem; margin: 1.4rem 0 .4rem; }
.dl-docs .lead { font-size: 1.05rem; }
.dl-docs ul { padding-left: 1.3rem; }
.dl-docs li { margin: .3rem 0; }
.dl-docs code { font-size: .9em; padding: .05rem .3rem; border-radius: 4px; background: var(--dg-soft); overflow-wrap: anywhere; }
.dl-docs .source { margin: 2.5rem 0 1rem; color: var(--dl-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 var(--dl-font); 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 var(--dl-font); color: var(--dg-text); }
.dg-text small { font: 12.5px/1.45 var(--dl-font); 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 var(--dl-font); }
.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 var(--dl-font); color: var(--dg-text); }
.dg-badge { align-self: flex-start; font: 650 10.5px/1 var(--dl-font); 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 var(--dl-font); }
.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; }

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


@media (max-width: 640px) {
  .dl-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; }
  .dl-docs th, .dl-docs td { padding: 7px 9px; }
}

.dl-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 var(--dl-mono); white-space: pre; }

/* Read-more cards linking a docs page's sections or the app's other technical pages:
   <div class="dl-docs-cards"><a class="dl-docs-card" href="/cost"><span class="dg-icon">…</span>
     <span class="dl-docs-card-text"><strong>Cost</strong><span class="dl-docs-card-line">…</span><span class="dl-docs-card-key">Read more →</span></span></a></div> */
.dl-docs-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; margin: 14px 0 0; }
.dl-docs-card {
  display: flex; align-items: flex-start; gap: 14px; padding: 16px 18px; border: 1px solid var(--dl-line); border-radius: var(--dl-radius);
  background: var(--dl-surface); color: var(--dl-text); text-decoration: none; transition: border-color .15s, box-shadow .15s;
}
.dl-docs-card:hover { border-color: var(--dl-accent); box-shadow: 0 2px 8px #0000000d; color: var(--dl-text); text-decoration: none; }
.dl-docs-card-text { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.dl-docs-card-text strong { font: 650 17px/1.3 var(--dl-font); }
.dl-docs-card-line { font-size: 14px; line-height: 1.45; color: var(--dl-muted); }
.dl-docs-card-key { margin-top: 4px; font-size: 14px; font-weight: 650; color: var(--dl-accent); }
/* Security findings: .status (green, done) and .status.fixed (amber, fixed after review). */
.dl-docs .status.fixed { color: #b26b00; }