/* Thư viện Pháp luật — giao diện chung */
:root {
  --bg: #f7f5f1;
  --surface: #ffffff;
  --surface-2: #f1ede6;
  --text: #1f1c19;
  --muted: #6b645c;
  --border: #e3ddd3;
  --primary: #8a2323;
  --primary-ink: #ffffff;
  --primary-soft: #f6e7e4;
  --link: #8a2323;
  --focus: #c2410c;
  --ok: #166534; --ok-bg: #dcfce7;
  --partial: #92400e; --partial-bg: #fef3c7;
  --pending: #1e40af; --pending-bg: #dbeafe;
  --expired: #991b1b; --expired-bg: #fee2e2;
  --unknown: #4b5563; --unknown-bg: #e5e7eb;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(31, 28, 25, .06), 0 2px 8px rgba(31, 28, 25, .04);
  --font-ui: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-doc: "Times New Roman", Times, "Noto Serif", "Liberation Serif", serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #131211; --surface: #1c1a19; --surface-2: #242120; --text: #ece7e1; --muted: #a39b91;
    --border: #35312d; --primary: #e0857a; --primary-ink: #1a0d0b; --primary-soft: #3a2220; --link: #eb9a90;
    --focus: #fb923c;
    --ok: #86efac; --ok-bg: #14321f; --partial: #fcd34d; --partial-bg: #3a2c0d; --pending: #93c5fd; --pending-bg: #172a4a;
    --expired: #fca5a5; --expired-bg: #3f1717; --unknown: #d1d5db; --unknown-bg: #2c2f33;
    --shadow: none; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #131211; --surface: #1c1a19; --surface-2: #242120; --text: #ece7e1; --muted: #a39b91;
  --border: #35312d; --primary: #e0857a; --primary-ink: #1a0d0b; --primary-soft: #3a2220; --link: #eb9a90;
  --focus: #fb923c;
  --ok: #86efac; --ok-bg: #14321f; --partial: #fcd34d; --partial-bg: #3a2c0d; --pending: #93c5fd; --pending-bg: #172a4a;
  --expired: #fca5a5; --expired-bg: #3f1717; --unknown: #d1d5db; --unknown-bg: #2c2f33;
  --shadow: none; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.55 var(--font-ui); }
a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { line-height: 1.25; text-wrap: balance; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); }
.mono { font-family: var(--font-mono); font-size: .92em; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }
[hidden] { display: none !important; }

/* ---------- header ---------- */
.site-header { background: var(--primary); color: var(--primary-ink); }
.header-inner { display: flex; align-items: center; gap: 16px; min-height: 60px; flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px; }
.brand { display: flex; align-items: center; gap: 10px; color: inherit; text-decoration: none; font-weight: 700; font-size: 1.1rem; letter-spacing: .01em; }
.brand-mark { width: 28px; height: 28px; flex: none; }
.header-search { flex: 1 1 320px; display: flex; max-width: 560px; }
.header-search input { flex: 1; min-width: 0; border: 0; border-radius: 8px 0 0 8px; padding: 9px 12px; font: inherit; background: var(--surface); color: var(--text); }
.header-search button { border: 0; border-radius: 0 8px 8px 0; padding: 0 12px; background: var(--surface-2); color: var(--text); cursor: pointer; }
.header-search svg, .theme-toggle svg { width: 20px; height: 20px; display: block; }
.header-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.header-nav a { color: inherit; text-decoration: none; padding: 8px 10px; border-radius: 8px; font-weight: 500; }
.header-nav a:hover { background: rgba(255, 255, 255, .14); }
.theme-toggle { background: transparent; border: 0; color: inherit; padding: 8px; border-radius: 8px; cursor: pointer; }
.theme-toggle:hover { background: rgba(255, 255, 255, .14); }

/* ---------- hero (trang chủ) ---------- */
.hero { background: linear-gradient(180deg, var(--primary) 0%, var(--primary) 55%, var(--bg) 55%); padding: 28px 0 8px; }
.hero h1 { color: var(--primary-ink); margin: 8px 0 6px; font-size: clamp(1.6rem, 4vw, 2.4rem); }
.hero-sub { color: var(--primary-ink); opacity: .9; margin: 0 0 18px; max-width: 60ch; }
.hero-search { display: flex; gap: 8px; background: var(--surface); padding: 8px; border-radius: 14px; box-shadow: 0 6px 24px rgba(0, 0, 0, .12); border: 1px solid var(--border); }
.hero-search input { flex: 1; min-width: 0; border: 0; font: inherit; font-size: 1.1rem; padding: 10px 12px; background: transparent; color: var(--text); }
.hero-search input:focus { outline: none; }
.hero-search button, .big-search button, .btn { background: var(--primary); color: var(--primary-ink); border: 0; border-radius: 10px; padding: 10px 18px; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; display: inline-block; text-align: center; }
.hero-search button:hover, .big-search button:hover, .btn:hover { filter: brightness(1.08); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 8px; }
.chip { display: inline-flex; gap: 6px; align-items: baseline; padding: 6px 12px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); color: var(--text); text-decoration: none; font-size: .93rem; }
.chip span { color: var(--muted); font-size: .85em; }
.chip:hover { border-color: var(--primary); color: var(--primary); }

.home-grid { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 24px; margin: 20px auto 40px; }
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; box-shadow: var(--shadow); }
.panel + .panel { margin-top: 16px; }
.panel h2 { font-size: 1.05rem; margin: 0; }
.panel-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 4px; }
.panel-head a { font-size: .9rem; }
.stats dl { margin: 10px 0 0; }
.stats dl div { display: flex; justify-content: space-between; padding: 6px 0; border-top: 1px solid var(--border); }
.stats dt { color: var(--muted); }
.stats dd { margin: 0; font-weight: 600; font-variant-numeric: tabular-nums; }

/* ---------- kết quả ---------- */
.results { list-style: none; margin: 0; padding: 0; }
.result { padding: 14px 0; border-top: 1px solid var(--border); }
.results > .result:first-child { border-top: 0; }
.result-title { font-weight: 600; text-decoration: none; display: block; color: var(--text); }
.result-title:hover { color: var(--link); text-decoration: underline; }
.result-meta { display: flex; flex-wrap: wrap; gap: 4px 14px; margin-top: 4px; font-size: .88rem; color: var(--muted); align-items: center; }
.results.compact .result { padding: 10px 0; }
.results.small .result-title { font-size: .95rem; }
.badge { display: inline-block; font-size: .78rem; font-weight: 600; padding: 2px 8px; border-radius: 999px; white-space: nowrap; }
.st-ok { color: var(--ok); background: var(--ok-bg); }
.st-partial { color: var(--partial); background: var(--partial-bg); }
.st-pending { color: var(--pending); background: var(--pending-bg); }
.st-expired { color: var(--expired); background: var(--expired-bg); }
.st-unknown { color: var(--unknown); background: var(--unknown-bg); }

/* ---------- trang tìm kiếm ---------- */
.search-layout { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 28px; margin-top: 24px; margin-bottom: 40px; }
.big-search { display: flex; gap: 8px; margin-bottom: 8px; }
.big-search input { flex: 1; min-width: 0; font: inherit; padding: 10px 14px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); color: var(--text); }
.results-head h1 { font-size: 1.35rem; margin: 14px 0 2px; }
.results-head p { margin: 0 0 8px; }
.sort { font-size: .9rem; color: var(--muted); display: flex; gap: 6px; align-items: center; flex-wrap: wrap; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.sort a { padding: 3px 10px; border-radius: 999px; text-decoration: none; color: var(--text); border: 1px solid transparent; }
.sort a.active { border-color: var(--primary); color: var(--primary); font-weight: 600; }
.filters { font-size: .93rem; }
.facet { margin-bottom: 18px; }
.facet h3 { font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin: 0 0 8px; }
.facet ul { list-style: none; margin: 0; padding: 0; }
.facet li a { display: flex; justify-content: space-between; gap: 8px; padding: 5px 8px; border-radius: 6px; color: var(--text); text-decoration: none; }
.facet li a:hover { background: var(--surface-2); }
.facet li a.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.facet .count { color: var(--muted); font-variant-numeric: tabular-nums; }
.facet details summary { cursor: pointer; color: var(--link); padding: 5px 8px; }
.seg { display: flex; flex-direction: column; gap: 4px; }
.seg label { display: flex; gap: 8px; align-items: center; padding: 2px 8px; }
.years { display: flex; gap: 6px; align-items: center; }
.years input { width: 100%; padding: 7px 8px; border: 1px solid var(--border); border-radius: 8px; font: inherit; background: var(--surface); color: var(--text); }
.btn-secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); border-radius: 10px; padding: 8px 14px; font: inherit; cursor: pointer; }
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); }
.filter-form { margin-bottom: 18px; }
.clear { font-weight: 600; }
.empty { padding: 32px 0; }
.pager { display: flex; flex-wrap: wrap; gap: 6px; margin: 20px 0; }
.pager a, .pager span { min-width: 38px; text-align: center; padding: 7px 10px; border-radius: 8px; border: 1px solid var(--border); text-decoration: none; background: var(--surface); }
.pager .current { background: var(--primary); color: var(--primary-ink); border-color: var(--primary); font-weight: 600; }
.pager .gap { border: 0; background: transparent; }

/* ---------- trang văn bản ---------- */
.doc-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 28px; margin-top: 16px; margin-bottom: 48px; }
.crumbs { font-size: .88rem; color: var(--muted); margin: 6px 0 10px; }
.crumbs a { color: var(--muted); }
.doc-head h1 { font-size: clamp(1.3rem, 2.6vw, 1.75rem); margin: 0 0 10px; }
.doc-sub { display: flex; flex-wrap: wrap; gap: 6px 16px; color: var(--muted); font-size: .93rem; align-items: center; }
.doc-tabs { position: sticky; top: 0; z-index: 2; display: flex; gap: 4px; margin: 18px 0 0; padding: 8px 0; background: var(--bg); border-bottom: 1px solid var(--border); overflow-x: auto; }
.doc-tabs a { padding: 6px 12px; border-radius: 8px; text-decoration: none; color: var(--text); font-weight: 500; white-space: nowrap; }
.doc-tabs a:hover { background: var(--surface-2); }
.doc-tabs .count { font-size: .8em; color: var(--muted); }
.doc-section { scroll-margin-top: 64px; margin-top: 20px; }
.doc-section > h2 { font-size: 1.2rem; }
.doc-content { background: #fff; color: #111; border: 1px solid var(--border); border-radius: var(--radius); padding: clamp(16px, 4vw, 48px); font: 17px/1.6 var(--font-doc); overflow-x: auto; box-shadow: var(--shadow); }
.doc-content a { color: #8a2323; }
.doc-content p { margin: .5em 0; }
.doc-content table { border-collapse: collapse; max-width: 100%; }
.doc-content td, .doc-content th { vertical-align: top; padding: 2px 6px; }
.doc-content table[border] td, .doc-content table[border] th { border: 1px solid #999; }
.doc-content img { max-width: 100%; height: auto; }
.doc-content .toc-target { scroll-margin-top: 64px; }
.doc-content .toc-target:target { background: #fff4c2; }
.props { margin: 0; display: grid; grid-template-columns: 1fr; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); overflow: hidden; }
.props div { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 12px; padding: 9px 14px; border-top: 1px solid var(--border); }
.props div:first-child { border-top: 0; }
.props dt { color: var(--muted); }
.props dd { margin: 0; overflow-wrap: anywhere; }
.rel-group { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 10px; }
.rel-group summary { cursor: pointer; padding: 10px 14px; display: flex; justify-content: space-between; gap: 12px; font-weight: 600; }
.rel-group summary .count { color: var(--muted); font-weight: 500; font-variant-numeric: tabular-nums; }
.rel-group ul { margin: 0; padding: 0 14px 10px 32px; }
.rel-group li { padding: 5px 0; }
.rel-meta { display: inline-flex; flex-wrap: wrap; gap: 4px 10px; margin-left: 8px; font-size: .85rem; color: var(--muted); align-items: center; }
.doc-side .side-sticky { position: sticky; top: 12px; display: flex; flex-direction: column; gap: 16px; max-height: calc(100vh - 24px); }
.doc-side .panel + .panel { margin-top: 0; }
.actions { display: flex; flex-direction: column; gap: 8px; }
.toc { display: flex; flex-direction: column; min-height: 0; }
.toc h2 { margin-bottom: 8px; }
.toc-filter { padding: 7px 10px; border: 1px solid var(--border); border-radius: 8px; font: inherit; font-size: .9rem; margin-bottom: 8px; background: var(--surface); color: var(--text); }
.toc ol { list-style: none; margin: 0; padding: 0; overflow-y: auto; font-size: .88rem; }
.toc li a { display: block; padding: 4px 6px; border-radius: 6px; text-decoration: none; color: var(--text); }
.toc li a:hover { background: var(--surface-2); }
.toc li.lv-1 a { font-weight: 600; }
.toc li.lv-2 a { padding-left: 14px; font-weight: 500; }
.toc li.lv-3 a { padding-left: 22px; color: var(--muted); }
.toc li a.current { background: var(--primary-soft); color: var(--primary); }

/* ---------- trang nội dung ---------- */
.prose { max-width: 820px; margin: 24px auto 48px; }
.prose h1 { font-size: 1.8rem; }
.prose h2 { font-size: 1.25rem; margin-top: 28px; }
.prose li { margin: 6px 0; }
.prose .props { margin-top: 8px; }
.center { text-align: center; }
.center .big-search { max-width: 560px; margin: 20px auto; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--border); background: var(--surface); font-size: .9rem; }
.footer-inner { padding-top: 20px; padding-bottom: 28px; }
.footer-inner p { margin: 6px 0; max-width: 90ch; }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .home-grid, .doc-layout { grid-template-columns: minmax(0, 1fr); }
  .doc-side { order: -1; }
  .doc-side .side-sticky { position: static; max-height: none; }
  .actions { flex-direction: row; flex-wrap: wrap; }
  .toc ol { max-height: 50vh; }
}
@media (max-width: 760px) {
  .search-layout { grid-template-columns: minmax(0, 1fr); }
  .filters { order: 2; border-top: 1px solid var(--border); padding-top: 16px; }
  .header-search { order: 3; flex-basis: 100%; max-width: none; }
  .props div { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .hero-search { flex-direction: column; }
  .hero-search button { width: 100%; }
}

@media print {
  .site-header, .site-footer, .doc-side, .doc-tabs, .crumbs, #thuoc-tinh, #luoc-do { display: none !important; }
  .doc-layout { display: block; }
  .doc-content { border: 0; padding: 0; box-shadow: none; }
  body { background: #fff; }
}