:root {
  --bg: #ffffff; --fg: #111827; --muted: #4b5563; --line: #e5e7eb; --card: #f9fafb;
  --accent: #1d4ed8; --accent-fg: #ffffff; --warn: #b91c1c; --warn-bg: #fee2e2; --above: #1d4ed8; --above-bg: #dbeafe;
  --mutedflag-bg: #f3f4f6; --mutedflag: #4b5563;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f17; --fg: #e5e7eb; --muted: #9ca3af; --line: #1f2937; --card: #111827;
    --accent: #60a5fa; --accent-fg: #0b0f17; --warn: #fca5a5; --warn-bg: #3b1212; --above: #93c5fd; --above-bg: #10233f;
    --mutedflag-bg: #1f2937; --mutedflag: #9ca3af;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); }
.wrap { max-width: 980px; margin: 0 auto; padding: 0 16px; }
.top { border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; flex-wrap: wrap; gap: 8px 20px; align-items: center; justify-content: space-between; padding-top: 12px; padding-bottom: 12px; }
.brand { font-weight: 700; color: var(--fg); text-decoration: none; }
.brand span { font-weight: 400; color: var(--muted); }
nav a { margin-left: 16px; } nav a:first-child { margin-left: 0; }
main { padding-top: 24px; padding-bottom: 40px; }
h1 { font-size: clamp(1.6rem, 4vw, 2.3rem); line-height: 1.2; margin: 8px 0 12px; }
h2 { font-size: 1.3rem; margin-top: 32px; }
.sub { font-size: 1.1rem; color: var(--muted); max-width: 46em; }
.meta, .note, .crumbs { color: var(--muted); font-size: .92rem; }
.form { margin: 20px 0; padding: 16px; background: var(--card); border: 1px solid var(--line); border-radius: 10px; }
.form label { display: block; font-weight: 600; margin-bottom: 6px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; }
.row input { flex: 1 1 260px; min-width: 0; padding: 10px 12px; font: inherit; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--fg); }
.btn { display: inline-block; padding: 10px 16px; border-radius: 8px; border: 1px solid var(--accent); background: var(--accent); color: var(--accent-fg); font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.btn:disabled { opacity: .6; cursor: default; }
.btn-ghost { background: transparent; color: var(--accent); }
.error { color: var(--warn); font-weight: 600; }
.tablewrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 12px 0; }
table.gap { width: 100%; border-collapse: collapse; font-size: .95rem; }
table.gap th, table.gap td { padding: 8px 10px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
table.gap thead th { font-size: .85rem; color: var(--muted); font-weight: 600; }
table.gap .num { text-align: right; font-variant-numeric: tabular-nums; }
tr.baseline { background: var(--card); }
tr.low td, tr.low th { color: var(--muted); }
.flag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: .8rem; font-weight: 700; }
.flag-warn { background: var(--warn-bg); color: var(--warn); }
.flag-above { background: var(--above-bg); color: var(--above); }
.flag-muted { background: var(--mutedflag-bg); color: var(--mutedflag); font-weight: 600; }
.lowtag { font-size: .8rem; color: var(--mutedflag); }
.cta { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; margin: 24px 0; }
.cta-item { padding: 16px; border: 1px solid var(--line); border-radius: 10px; background: var(--card); }
.cta-item[hidden] { display: none; }
.cta-item h3 { margin: 0 0 6px; font-size: 1.05rem; }
.thanks { color: var(--muted); font-size: .92rem; }
.benefits { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-top: 24px; }
.benefits h3 { margin-bottom: 4px; font-size: 1.05rem; }
.benefits p { margin-top: 0; color: var(--muted); }
.facts li { margin: 4px 0; }
.toplist li { margin: 4px 0; }
.faq details { border-bottom: 1px solid var(--line); padding: 10px 0; }
.faq summary { cursor: pointer; font-weight: 600; }
.foot { border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
.foot .wrap { padding-top: 16px; padding-bottom: 24px; }