/* Budget docs — layered on top of site.css.
   Three-column reading layout: topic nav, prose, page TOC. */

:root {
  --doc-nav: 250px;
  --doc-toc: 220px;
  --code-bg: #f3f6f9;
  --code-ink: #1d3b53;
}

/* ---------- Hub ---------- */
.doc-hero { padding-bottom: 26px; }
.doc-hero h1 { max-width: 18ch; }
.doc-hero-search { max-width: 520px; margin: 28px auto 0; }
.doc-hero-search input {
  width: 100%; font: inherit; font-size: 1.02rem; padding: 14px 18px 14px 46px;
  border: 1px solid var(--line); border-radius: 12px; background: #fff;
  box-shadow: var(--shadow-sm); color: var(--ink);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7c8c' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m20 20-3.5-3.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: 16px 50%; background-size: 18px;
}
.doc-hero-search input:focus { outline: 2px solid var(--blue); outline-offset: 1px; border-color: transparent; }

.doc-hub { padding-top: 40px; }
.doc-hub-empty { text-align: center; color: var(--muted); padding: 30px 0 10px; }
.doc-section + .doc-section { margin-top: 52px; }
.doc-section-head { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 20px; }
.doc-section-ico {
  width: 40px; height: 40px; flex: 0 0 40px; border-radius: 10px; background: var(--blue-soft);
  display: grid; place-items: center; font-size: 20px;
}
.doc-section-head h2 { font-size: 1.4rem; margin: 0 0 2px; }
.doc-section-head p { margin: 0; color: var(--muted); font-size: .97rem; }
.doc-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.doc-card {
  display: block; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow-sm); transition: .16s; color: var(--body);
}
.doc-card:hover { text-decoration: none; transform: translateY(-2px); box-shadow: var(--shadow); border-color: #cfe0ee; }
.doc-card h3 { font-size: 1.05rem; margin: 0 0 6px; }
.doc-card p { margin: 0; font-size: .93rem; color: var(--muted); line-height: 1.55; }

/* ---------- Page layout ---------- */
.doc-layout { padding: 0; }
.doc-grid {
  display: grid;
  grid-template-columns: var(--doc-nav) minmax(0, 1fr) var(--doc-toc);
  gap: 40px; padding-top: 34px; padding-bottom: 60px;
  /* stretch (not start) so the nav/TOC cells are as tall as the article —
     a sticky child can only travel within its own grid cell */
  align-items: stretch;
}

/* topic nav */
.doc-nav-toggle { display: none; }              /* disclosure only on mobile */
.doc-nav-inner { position: sticky; top: 88px; max-height: calc(100vh - 110px); overflow-y: auto; padding-right: 4px; }
.doc-search input {
  width: 100%; font: inherit; font-size: .93rem; padding: 9px 12px; margin-bottom: 18px;
  border: 1px solid var(--line); border-radius: 9px; background: var(--bg-soft); color: var(--ink);
}
.doc-search input:focus { outline: 2px solid var(--blue); outline-offset: 1px; background: #fff; }
.doc-nav-group + .doc-nav-group { margin-top: 20px; }
.doc-nav-group h4 {
  font-size: .72rem; letter-spacing: .07em; text-transform: uppercase; color: var(--muted);
  margin: 0 0 8px; font-weight: 700;
}
.doc-nav-group ul { list-style: none; margin: 0; padding: 0; }
.doc-nav-group li a {
  display: block; padding: 6px 10px; border-radius: 7px; color: var(--body);
  font-size: .94rem; border-left: 2px solid transparent;
}
.doc-nav-group li a:hover { background: var(--bg-soft); text-decoration: none; color: var(--ink); }
.doc-nav-group li a.active {
  background: var(--blue-soft); color: var(--blue-dark); font-weight: 600; border-left-color: var(--blue);
}
.doc-nav-empty { color: var(--muted); font-size: .9rem; padding: 6px 10px; }

/* page TOC */
.doc-toc-inner { position: sticky; top: 88px; max-height: calc(100vh - 110px); overflow-y: auto; }
.doc-toc h4 {
  font-size: .72rem; letter-spacing: .07em; text-transform: uppercase; color: var(--muted);
  margin: 0 0 10px; font-weight: 700;
}
.doc-toc ul { list-style: none; margin: 0 0 18px; padding: 0; border-left: 1px solid var(--line); }
.doc-toc li a {
  display: block; padding: 5px 0 5px 14px; margin-left: -1px; color: var(--muted);
  font-size: .88rem; line-height: 1.4; border-left: 2px solid transparent;
}
.doc-toc li a:hover { color: var(--ink); text-decoration: none; }
.doc-toc li a.active { color: var(--blue-dark); border-left-color: var(--blue); font-weight: 600; }
.doc-toc li.lvl-3 a { padding-left: 26px; font-size: .84rem; }
.doc-toc-gh { font-size: .86rem; }

/* ---------- Article ---------- */
.doc-body { min-width: 0; }
.crumbs { font-size: .86rem; color: var(--muted); margin-bottom: 12px; }
.crumbs span { margin: 0 5px; }
.doc-body h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); margin-bottom: 12px; }
.doc-lead { font-size: 1.1rem; color: var(--muted); line-height: 1.6; margin-bottom: 14px; }
.doc-meta { font-size: .88rem; color: var(--muted); margin-bottom: 26px; }
.doc-meta span { margin: 0 6px; }
.doc-shot { margin: 0 0 32px; cursor: zoom-in; }

.prose-doc { font-size: 1.02rem; }
.prose-doc h2 {
  font-size: 1.55rem; margin: 2.1em 0 .6em; padding-top: .35em;
  border-top: 1px solid var(--line);
}
.prose-doc h2:first-child { margin-top: 0; border-top: 0; padding-top: 0; }
.prose-doc h3 { font-size: 1.18rem; margin: 1.7em 0 .5em; }
.prose-doc h4 { font-size: 1.02rem; margin: 1.5em 0 .4em; color: var(--ink); }
.prose-doc p { margin: 0 0 1.05em; }
.prose-doc ul, .prose-doc ol { padding-left: 24px; margin: 0 0 1.1em; }
.prose-doc li { margin: 7px 0; }
.prose-doc li > ul, .prose-doc li > ol { margin: 7px 0 0; }
.prose-doc hr { border: 0; border-top: 1px solid var(--line); margin: 2.2em 0; }
.prose-doc strong { color: var(--ink); }
.prose-doc img { border-radius: var(--radius-sm); border: 1px solid var(--line); margin: 1em 0; }

/* heading anchors */
.prose-doc .anchor {
  margin-left: 9px; color: var(--line); font-weight: 400; opacity: 0;
  transition: .12s; text-decoration: none;
}
.prose-doc h2:hover .anchor, .prose-doc h3:hover .anchor { opacity: 1; color: #b6c4d1; }
.prose-doc .anchor:hover { color: var(--blue) !important; text-decoration: none; }
.prose-doc :is(h2, h3) { scroll-margin-top: 84px; }

/* code */
.prose-doc code {
  background: var(--code-bg); color: var(--code-ink); padding: .15em .42em; border-radius: 5px;
  font-size: .88em; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  border: 1px solid #e3eaf1;
}
.prose-doc pre {
  background: var(--bg-dark); color: #dbe6f0; padding: 16px 18px; border-radius: var(--radius-sm);
  overflow-x: auto; margin: 0 0 1.2em; font-size: .88rem; line-height: 1.55;
}
.prose-doc pre code { background: none; border: 0; padding: 0; color: inherit; font-size: inherit; }

/* tables */
.table-wrap { overflow-x: auto; margin: 0 0 1.4em; border: 1px solid var(--line); border-radius: var(--radius-sm); }
.prose-doc table { border-collapse: collapse; width: 100%; font-size: .93rem; }
.prose-doc th, .prose-doc td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose-doc thead th { background: var(--bg-soft); color: var(--ink); font-weight: 600; white-space: nowrap; }
.prose-doc tbody tr:last-child td { border-bottom: 0; }
.prose-doc tbody tr:hover { background: #fafcfe; }

/* callouts (from blockquotes) */
.callout {
  margin: 0 0 1.3em; padding: 14px 18px; border-radius: var(--radius-sm);
  border-left: 3px solid var(--blue); background: var(--blue-soft); color: var(--ink);
}
.callout > :last-child { margin-bottom: 0; }
.callout-tip { border-left-color: var(--green); background: #eaf6ea; }
.callout-warn { border-left-color: #d97706; background: #fdf3e3; }

/* pager */
.doc-pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 52px; padding-top: 26px; border-top: 1px solid var(--line); }
.doc-pager a {
  display: flex; flex-direction: column; gap: 3px; padding: 16px 18px;
  border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; transition: .15s;
}
.doc-pager a:hover { text-decoration: none; border-color: #c9d9e6; box-shadow: var(--shadow-sm); }
.doc-pager span { font-size: .82rem; color: var(--muted); }
.doc-pager b { color: var(--ink); font-size: .98rem; }
.doc-pager .next { text-align: right; }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .doc-grid { grid-template-columns: var(--doc-nav) minmax(0, 1fr); gap: 32px; }
  .doc-toc { display: none; }
  .doc-cards { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  .doc-grid { grid-template-columns: 1fr; gap: 8px; }
  .doc-nav-inner { position: static; max-height: none; overflow: visible; }
  .doc-nav {
    border: 1px solid var(--line); border-radius: var(--radius); padding: 0;
    background: var(--bg-soft); margin-bottom: 24px;
  }
  .doc-nav-toggle {
    display: flex; align-items: center; justify-content: space-between; width: 100%;
    padding: 14px 18px; cursor: pointer; font: inherit; font-weight: 600;
    font-size: .97rem; color: var(--ink); background: none; border: 0;
    border-bottom: 1px solid var(--line); text-align: left;
  }
  .doc-nav-toggle::after {
    content: ""; width: 10px; height: 10px; border-right: 2px solid var(--muted);
    border-bottom: 2px solid var(--muted); transform: rotate(-135deg) translate(-2px, -2px);
    transition: transform .18s;
  }
  .doc-nav[data-collapsed="true"] .doc-nav-toggle { border-bottom: 0; }
  .doc-nav[data-collapsed="true"] .doc-nav-toggle::after { transform: rotate(45deg) translate(-2px, -2px); }
  .doc-nav[data-collapsed="true"] .doc-nav-inner { display: none; }
  .doc-nav .doc-nav-inner { padding: 16px 18px; }
  .doc-nav nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
  .doc-nav-group + .doc-nav-group { margin-top: 0; }
  .doc-cards { grid-template-columns: 1fr; }
  .doc-pager { grid-template-columns: 1fr; }
  .doc-pager .next { text-align: left; }
}