:root {
  --bg: #ffffff; --bg-alt: #f5f7fa; --fg: #17202a; --muted: #55606e; --line: #d9dee5;
  --accent: #1f5fbf; --accent-fg: #ffffff; --warn-bg: #fff6e0; --warn-line: #e5c370; --ok: #17794a;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161b; --bg-alt: #1a2028; --fg: #e6eaef; --muted: #9aa5b2; --line: #2d3640;
    --accent: #6ea8ff; --accent-fg: #0b1220; --warn-bg: #2a2412; --warn-line: #6b5a22; --ok: #5fcf97;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 var(--font); }
a { color: var(--accent); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.wrap { max-width: 56rem; margin: 0 auto; padding: 0 1rem; }
header.site { border-bottom: 1px solid var(--line); background: var(--bg-alt); }
header.site .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem 1.5rem; padding-top: .75rem; padding-bottom: .75rem; }
.brand { font-weight: 700; font-size: 1.15rem; color: var(--fg); text-decoration: none; }
nav.main { display: flex; flex-wrap: wrap; gap: .25rem 1.1rem; font-size: .95rem; }
nav.main a { color: var(--fg); text-decoration: none; }
nav.main a:hover { text-decoration: underline; }
main { padding: 1.5rem 0 3rem; }
h1 { font-size: 1.85rem; line-height: 1.25; margin: .2rem 0 .8rem; }
h2 { font-size: 1.3rem; margin: 2.2rem 0 .6rem; line-height: 1.3; }
h3 { font-size: 1.05rem; margin: 1.4rem 0 .4rem; }
p, ul, ol { margin: .6rem 0; }
.answer { font-size: 1.1rem; padding: .9rem 1rem; background: var(--bg-alt); border-left: 4px solid var(--accent); border-radius: 4px; }
.meta { color: var(--muted); font-size: .9rem; }
.tablewrap { overflow-x: auto; margin: .8rem 0; border: 1px solid var(--line); border-radius: 6px; }
table { border-collapse: collapse; width: 100%; font-size: .93rem; }
th, td { padding: .5rem .65rem; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--bg-alt); font-weight: 600; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.tag { display: inline-block; font-size: .75rem; padding: 0 .4rem; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); white-space: nowrap; }
.tag.warn { border-color: var(--warn-line); background: var(--warn-bg); color: var(--fg); }
.notice { background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: 6px; padding: .6rem .9rem; font-size: .93rem; }
.disclaimer, .affiliate-disclosure { color: var(--muted); font-size: .88rem; margin: .5rem 0; }
.calc { background: var(--bg-alt); border: 1px solid var(--line); border-radius: 8px; padding: 1rem; margin: 1rem 0; }
.calc form { display: grid; gap: .8rem; grid-template-columns: 1fr; }
.calc label { display: block; font-size: .88rem; font-weight: 600; margin-bottom: .2rem; }
.calc input[type=number], .calc select { width: 100%; font: inherit; padding: .5rem .6rem; background: var(--bg); color: var(--fg); border: 1px solid var(--line); border-radius: 6px; min-height: 2.6rem; }
.calc .check { display: flex; gap: .5rem; align-items: center; font-weight: 400; }
.calc .check input { width: 1.1rem; height: 1.1rem; }
.cards { display: grid; gap: .8rem; grid-template-columns: 1fr; margin: .8rem 0; }
.card { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: .8rem 1rem; }
.card h3 { margin: 0 0 .3rem; }
.card .big { font-size: 1.35rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.card ul { padding-left: 1.1rem; font-size: .88rem; color: var(--muted); }
details { border: 1px solid var(--line); border-radius: 6px; padding: .5rem .8rem; margin: .5rem 0; }
summary { cursor: pointer; font-weight: 600; }
footer.site { border-top: 1px solid var(--line); background: var(--bg-alt); padding: 1.2rem 0 2rem; font-size: .9rem; color: var(--muted); }
footer.site nav { display: flex; flex-wrap: wrap; gap: .3rem 1.1rem; margin-bottom: .6rem; }
.btn { display: inline-block; padding: .5rem .9rem; border-radius: 6px; background: var(--accent); color: var(--accent-fg); text-decoration: none; font-weight: 600; }
@media (min-width: 40rem) {
  .calc form { grid-template-columns: 1fr 1fr; }
  .calc form .full { grid-column: 1 / -1; }
  .cards { grid-template-columns: repeat(3, 1fr); }
  h1 { font-size: 2.2rem; }
}