:root {
  --bg: #fbfaf7;
  --card: #ffffff;
  --ink: #18181b;
  --muted: #5f5f6b;
  --line: #e6e3dc;
  --soft: #f3f1ec;
  --accent: #0e7c86;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #121214; --card: #1b1b1f; --ink: #f1f0ec; --muted: #a6a5ae; --line: #2d2d33; --soft: #1f1f24; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.65 Georgia, "Iowan Old Style", "Times New Roman", serif; overflow-x: hidden; }
h1, h2, h3, .brand, nav, .btn, .eyebrow, .calc, .card, footer, .crumb, .updated, summary, th, .note, .box, .cta { font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 780px; padding-top: 28px; }
header.top { border-bottom: 1px solid var(--line); background: var(--bg); }
header.top .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 60px; gap: 12px; }
.brand { font-weight: 800; color: var(--ink); text-decoration: none; display: flex; align-items: center; gap: 9px; letter-spacing: -0.01em; }
.mark { width: 22px; height: 22px; border-radius: 6px; background: var(--accent); display: inline-block; }
nav { display: flex; gap: 14px; align-items: center; font-size: 14px; }
nav a { color: var(--muted); text-decoration: none; }
nav a.pill { color: #fff; background: var(--accent); padding: 7px 12px; border-radius: 999px; font-weight: 600; white-space: nowrap; }
@media (max-width: 520px) { nav a:not(.pill) { display: none; } .brand { font-size: 15px; } }
.hero { padding: 40px 0 24px; border-bottom: 1px solid var(--line); background: linear-gradient(180deg, var(--soft), var(--bg)); }
.eyebrow { color: var(--accent); font-weight: 700; font-size: 13px; letter-spacing: 0.04em; text-transform: uppercase; margin: 0 0 8px; }
h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.1; letter-spacing: -0.025em; margin: 0 0 14px; }
.answer { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 12px; padding: 14px 18px; max-width: 780px; margin: 0 0 12px; }
.updated { color: var(--muted); font-size: 13px; margin: 6px 0 18px; }
.grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 40px; padding-top: 28px; }
@media (max-width: 900px) { .grid { grid-template-columns: 1fr; } .side { order: -1; } }
.side { position: sticky; top: 16px; align-self: start; display: grid; gap: 14px; }
.box { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; font-size: 15px; }
.box h2 { font-size: 15px; margin: 0 0 8px; }
.box ol { margin: 0; padding-left: 20px; }
.box li { margin: 4px 0; }
.box a { text-decoration: none; }
.prose { min-width: 0; }
.prose h2 { font-size: clamp(22px, 3vw, 28px); line-height: 1.2; letter-spacing: -0.015em; margin: 36px 0 10px; scroll-margin-top: 16px; }
.prose h3 { font-size: 19px; margin: 24px 0 6px; }
.prose table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; display: block; overflow-x: auto; font-size: 15px; }
.prose th, .prose td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { background: var(--soft); font-size: 13px; color: var(--muted); }
.btn { display: inline-block; background: var(--accent); color: #fff; text-decoration: none; font-weight: 700; padding: 11px 16px; border-radius: 10px; font-size: 15px; border: 0; }
.cta { display: flex; gap: 18px; align-items: center; justify-content: space-between; flex-wrap: wrap; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; margin: 36px 0; }
.cta h2 { font-size: 20px; margin: 0 0 4px; }
.cta p { margin: 0; color: var(--muted); font-size: 15px; max-width: 620px; }
section { margin: 40px 0; }
section > h2 { font-size: clamp(22px, 3vw, 28px); letter-spacing: -0.015em; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; }
.card { display: block; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; text-decoration: none; color: var(--ink); }
.card:hover { border-color: var(--accent); }
.card h3 { font-size: 16px; margin: 0 0 6px; line-height: 1.3; }
.card p { font-size: 14px; color: var(--muted); margin: 0; font-family: system-ui, sans-serif; }
details { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; margin: 8px 0; max-width: 820px; }
summary { font-weight: 600; cursor: pointer; }
.crumb { font-size: 14px; margin: 0 0 8px; }
.lead { color: var(--muted); font-size: 18px; }
.calc { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; display: grid; gap: 16px; }
.calc-in { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.calc label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
.calc input { font: inherit; font-size: 17px; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 9px 11px; width: 100%; }
.calc input:focus-visible, .btn:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.calc-out { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 10px; }
.calc-out div { background: var(--soft); border-radius: 10px; padding: 12px; display: grid; gap: 2px; }
.calc-out span { font-size: 12px; color: var(--muted); }
.calc-out strong { font-size: 22px; }
.note { font-size: 13px; color: var(--muted); margin: 0; }
footer { border-top: 1px solid var(--line); margin-top: 48px; padding: 22px 0 40px; color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); }
:root { --link: var(--accent); }
@media (prefers-color-scheme: dark) {
  :root { --link: color-mix(in srgb, var(--accent) 45%, #ffffff); }
}
a, .box a, .crumb a { color: var(--link); }
.eyebrow { color: var(--link); }
footer a, nav a { color: var(--muted); }
.calc label { grid-template-rows: 1fr auto; }