/* Section Anything site. System fonts only, no external requests. */

:root {
  --bg: #ffffff;
  --bg-soft: #f5f7fa;
  --bg-card: #ffffff;
  --fg: #1b1f24;
  --muted: #57606a;
  --border: #d5dbe2;
  --accent: #0a5cc2;
  --accent-fg: #ffffff;
  --accent-soft: #e8f0fb;
  --bar: #2f6fbd;
  --bar-track: #e6eaef;
  --ours-bg: #f3f7fd;
  --callout-bg: #fff8e6;
  --callout-border: #e3c97a;
  --focus: #0a5cc2;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
  --radius: 10px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1216;
    --bg-soft: #161a20;
    --bg-card: #171b22;
    --fg: #e6e9ee;
    --muted: #9ba5b2;
    --border: #2c333d;
    --accent: #79b4ff;
    --accent-fg: #0b1220;
    --accent-soft: #17273d;
    --bar: #6aa6f0;
    --bar-track: #262c35;
    --ours-bg: #172131;
    --callout-bg: #221d10;
    --callout-border: #6b5a2a;
    --focus: #79b4ff;
    --shadow: none;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0f1216;
  --bg-soft: #161a20;
  --bg-card: #171b22;
  --fg: #e6e9ee;
  --muted: #9ba5b2;
  --border: #2c333d;
  --accent: #79b4ff;
  --accent-fg: #0b1220;
  --accent-soft: #17273d;
  --bar: #6aa6f0;
  --bar-track: #262c35;
  --ours-bg: #172131;
  --callout-bg: #221d10;
  --callout-border: #6b5a2a;
  --focus: #79b4ff;
  --shadow: none;
  color-scheme: dark;
}

/* ---- Base ---- */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 4.5rem; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 var(--font);
  overflow-wrap: break-word;
}
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 0.5em; }
h2 { font-size: 1.6rem; letter-spacing: -0.01em; }
h3 { font-size: 1.15rem; }
h4 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
p { margin: 0 0 1em; }
a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
code { font-family: var(--mono); font-size: 0.9em; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }

.wrap { max-width: 68rem; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip { position: absolute; left: 8px; top: -40px; padding: 6px 10px; background: var(--bg); z-index: 10; }
.skip:focus { top: 8px; }

/* ---- Top bar ---- */
.topbar {
  position: sticky; top: 0; z-index: 5;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.topbar-inner { display: flex; align-items: center; gap: 1rem; min-height: 3.5rem; }
.brand { font-weight: 700; color: var(--fg); text-decoration: none; white-space: nowrap; margin-right: auto; }
.topnav { display: flex; gap: 1.1rem; font-size: 0.95rem; }
.topnav a { color: var(--muted); text-decoration: none; }
.topnav a:hover { color: var(--fg); }
.topbar-repo { font-size: 0.95rem; }
.theme-toggle {
  font: inherit; font-size: 0.875rem;
  color: var(--fg); background: var(--bg-soft);
  border: 1px solid var(--border); border-radius: 999px;
  padding: 0.3rem 0.8rem; cursor: pointer; white-space: nowrap;
}
.theme-toggle:hover { border-color: var(--muted); }
@media (max-width: 760px) {
  .topnav { display: none; }
}

/* ---- Sections ---- */
main > section { padding: 3.25rem 0; border-top: 1px solid var(--border); }
main > section.hero { border-top: 0; }
.section-intro { color: var(--muted); max-width: 46rem; }

/* ---- Hero ---- */
.hero { padding: 4rem 0 3.5rem; background: var(--bg-soft); }
.hero h1 { font-size: clamp(2.2rem, 6vw, 3.4rem); letter-spacing: -0.02em; margin-bottom: 0.25rem; }
.tagline { font-size: clamp(1.15rem, 2.6vw, 1.45rem); font-weight: 600; margin-bottom: 1rem; }
.lede { max-width: 44rem; color: var(--muted); font-size: 1.05rem; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 1.5rem 0 0; }
.button {
  display: inline-block; padding: 0.6rem 1.1rem;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg-card); color: var(--fg);
  font-weight: 600; text-decoration: none;
}
.button:hover { border-color: var(--muted); }
.button-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }
.button-primary:hover { border-color: var(--fg); }

/* ---- Badges and tags ---- */
.badge {
  display: inline-block; padding: 0.15rem 0.6rem;
  border: 1px solid var(--border); border-radius: 999px;
  background: var(--bg-soft); color: var(--muted);
  font-size: 0.8rem; font-weight: 600; line-height: 1.5;
}
.badge-status { background: var(--accent-soft); color: var(--fg); border-color: transparent; margin-bottom: 1rem; }
.tag {
  display: inline-block; vertical-align: 0.1em;
  padding: 0 0.4rem; border: 1px solid var(--border); border-radius: 4px;
  font-size: 0.7rem; font-weight: 600; color: var(--muted); letter-spacing: 0.03em;
}

/* ---- Cards ---- */
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(min(15rem, 100%), 1fr)); }
.cards-wide { grid-template-columns: repeat(auto-fit, minmax(min(24rem, 100%), 1fr)); }
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.25rem; box-shadow: var(--shadow);
}
.card p { margin-bottom: 0.75rem; }
.card > :last-child, .example > :last-child, .callout > :last-child { margin-bottom: 0; }
.card-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.5rem; margin-bottom: 0.5rem; }
.card-head h3 { margin: 0; }
.facts { margin: 0; display: grid; gap: 0.6rem; font-size: 0.925rem; }
.facts dt { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.facts dd { margin: 0; }

/* ---- Results tables ---- */
.result { margin-top: 2.25rem; }
.result h3 { margin-bottom: 0.2rem; }
.meta { color: var(--muted); font-size: 0.875rem; margin-bottom: 0.75rem; }
.note { color: var(--muted); font-size: 0.925rem; margin-top: 0.75rem; max-width: 50rem; }
.headline { background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; }
.headline .table-wrap { background: var(--bg-card); }

.table-wrap {
  overflow-x: auto; max-width: 100%;
  border: 1px solid var(--border); border-radius: var(--radius);
}
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { padding: 0.6rem 0.85rem; text-align: left; vertical-align: top; border-top: 1px solid var(--border); }
thead th { border-top: 0; font-size: 0.8rem; color: var(--muted); font-weight: 600; background: var(--bg-soft); vertical-align: bottom; }
tbody th { font-weight: 400; min-width: 11rem; }
.th-sub { display: block; font-weight: 400; font-size: 0.75rem; }
.num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
thead th.num { white-space: normal; }
tr.ours { background: var(--ours-bg); }
tr.ours th, tr.ours td { font-weight: 700; }

.bar-cell { min-width: 11rem; }
.bar-line { display: flex; align-items: center; gap: 0.75rem; }
.bar { flex: 1; height: 0.7rem; background: var(--bar-track); border-radius: 0 4px 4px 0; overflow: hidden; }
.bar-fill { display: block; height: 100%; background: var(--bar); border-radius: 0 4px 4px 0; }
.bar-value { min-width: 2.6rem; text-align: right; font-variant-numeric: tabular-nums; }

/* ---- Where others win ---- */
.callout {
  background: var(--callout-bg); border: 1px solid var(--callout-border);
  border-radius: var(--radius); padding: 1.5rem;
}
.callout ul { margin: 0; padding-left: 1.25rem; }
.callout li + li { margin-top: 0.4rem; }

/* ---- Examples ---- */
.example { border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; margin-bottom: 1.25rem; background: var(--bg-card); }
.example-id { margin-bottom: 0.35rem; color: var(--muted); }
.scores { font-size: 0.95rem; }
.trees { display: grid; gap: 1rem; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.tree { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px; padding: 0.85rem 1rem; min-width: 0; }
.tree ul { list-style: none; margin: 0; padding: 0; font-family: var(--mono); font-size: 0.8rem; line-height: 1.5; }
.tree li { overflow-wrap: anywhere; padding: 0.15rem 0 0.15rem 2ch; text-indent: -2ch; }
.tree li.annot { color: var(--muted); font-style: italic; }
.tree-ours { border-color: var(--accent); }
@media (max-width: 760px) {
  .trees { grid-template-columns: 1fr; }
}

/* ---- Lists ---- */
.plain-list { padding-left: 1.25rem; max-width: 50rem; }
.plain-list li + li { margin-top: 0.4rem; }

/* ---- Footer ---- */
.footer { border-top: 1px solid var(--border); padding: 1.5rem 0 2.5rem; color: var(--muted); font-size: 0.9rem; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; }

@media (max-width: 480px) {
  main > section { padding: 2.5rem 0; }
  .hero { padding: 2.75rem 0 2.5rem; }
  th, td { padding: 0.55rem 0.6rem; }
  tbody th { min-width: 8rem; }
  .bar-cell { min-width: 7.5rem; }
  .bar-line { gap: 0.5rem; }
  .card, .example, .headline, .callout { padding: 1rem; }
}

/* Try it */
.steps { margin: 12px 0 8px 20px; padding: 0; display: grid; gap: 6px; }
.steps li { padding-left: 4px; }