:root {
  --bg: #ffffff;
  --fg: #16181d;
  --muted: #5b626e;
  --line: #e3e6ea;
  --accent: #1f5fd8;
  --accent-soft: #eef3fd;
  --code-bg: #f6f7f9;
  --max: 1080px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115; --fg: #e7e9ee; --muted: #9aa2b1; --line: #262b33;
    --accent: #6ea3ff; --accent-soft: #172234; --code-bg: #171a20;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
a { color: var(--accent); }
code { background: var(--code-bg); padding: 1px 5px; border-radius: 4px; font-size: 0.9em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
pre { background: var(--code-bg); border: 1px solid var(--line); border-radius: 8px;
  padding: 14px 16px; overflow-x: auto; }
pre code { background: none; padding: 0; font-size: 0.88em; line-height: 1.55; }

.hero { border-bottom: 1px solid var(--line); padding: 56px 0 40px; text-align: center; }
.hero h1 { margin: 0 0 10px; font-size: clamp(2.2rem, 6vw, 3.4rem); letter-spacing: -0.02em; }
.tagline { margin: 0 auto 14px; max-width: 720px; font-size: 1.12rem; color: var(--muted); }
.facts { margin: 0 0 26px; color: var(--muted); font-size: 0.95rem; }
.buttons { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.btn { display: inline-block; padding: 8px 15px; border: 1px solid var(--line); border-radius: 999px;
  color: var(--fg); text-decoration: none; font-size: 0.92rem; background: var(--bg); cursor: pointer; }
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { opacity: 0.9; color: #fff; }
.btn.disabled { color: var(--muted); cursor: default; }
.btn.disabled:hover { border-color: var(--line); color: var(--muted); }

section { padding: 40px 0; border-bottom: 1px solid var(--line); }
section:last-of-type { border-bottom: 0; }
h2 { font-size: 1.5rem; margin: 0 0 14px; letter-spacing: -0.01em; }
p.sub, p.legend { color: var(--muted); font-size: 0.92rem; }
figure { margin: 26px 0; text-align: center; }
figure img { max-width: 100%; height: auto; }
figure img + img { margin-top: 22px; }
figcaption { margin-top: 10px; color: var(--muted); font-size: 0.88rem; text-align: left; }

.tablewrap { overflow-x: auto; margin: 18px 0; }
table { border-collapse: collapse; width: 100%; font-size: 0.92rem; }
.grid th, .grid td { padding: 8px 11px; border-bottom: 1px solid var(--line); text-align: right; white-space: nowrap; }
.grid th:first-child, .grid td:first-child { text-align: left; }
.grid thead th { border-bottom: 2px solid var(--line); font-weight: 600; color: var(--muted); }
.grid tbody tr:hover { background: var(--code-bg); }
.grid tr.total td { font-weight: 700; border-top: 2px solid var(--line); }
.spec th, .spec td { padding: 8px 11px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.spec th { width: 190px; color: var(--muted); font-weight: 600; white-space: nowrap; }

.lb thead th .arrow { opacity: 0.45; font-size: 0.8em; }
.lb .group { border-left: 1px solid var(--line); }
.lb td.best { font-weight: 700; }
.lb td.second { text-decoration: underline; }
.lb tr.ours { background: var(--accent-soft); }
.lb tr.ours td:first-child { font-weight: 700; }
.lb td.rank { color: var(--muted); width: 34px; }
.lb a { text-decoration: none; }
.lb a:hover { text-decoration: underline; }
.lb .links { font-size: 0.85em; color: var(--muted); }

.callout { border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: 6px;
  padding: 14px 18px; margin: 24px 0 0; background: var(--code-bg); font-size: 0.93rem; }
.callout h3 { margin: 0 0 8px; font-size: 1rem; }
.callout table { margin-top: 10px; }

footer { border-top: 1px solid var(--line); padding: 26px 0; color: var(--muted); font-size: 0.88rem; }

.controls { display: flex; align-items: center; gap: 4px; margin: 14px 0 0; }
.btn.small { padding: 5px 12px; font-size: 0.85rem; }
.hint { color: var(--muted); font-size: 0.85rem; }
.lb thead th.sortable { cursor: pointer; user-select: none; }
.lb thead th.sortable:hover { color: var(--accent); }
.lb thead th.blockhead { text-align: center; font-weight: 600; letter-spacing: 0.02em;
  text-transform: uppercase; font-size: 0.76rem; padding-bottom: 4px; }
.lb thead tr:first-child th { border-bottom: 1px solid var(--line); }
.lb thead tr:last-child th { border-bottom: 2px solid var(--line); }
/* the rank column pushed Method out of :first-child, so it needs its own rule */
.lb th:nth-child(2), .lb td:nth-child(2) { text-align: left; }
.lb .tag { display: inline-block; margin-left: 8px; padding: 1px 7px; border-radius: 999px;
  font-size: 0.7rem; letter-spacing: 0.03em; text-transform: uppercase; vertical-align: 1px;
  border: 1px solid var(--line); color: var(--muted); }
.lb .tag.evidence-pack { border-color: var(--accent); color: var(--accent); }
.tagdemo { display: inline-block; padding: 1px 7px; border-radius: 999px; font-size: 0.7rem;
  letter-spacing: 0.03em; text-transform: uppercase; border: 1px solid var(--line); color: var(--muted); }
.tagdemo.verified { border-color: var(--accent); color: var(--accent); }