:root {
  --bg: #f6f5f1; --panel: #ffffff; --ink: #1b2126; --muted: #5b6670; --line: #dfe2e4;
  --accent: #23614f; --accent-ink: #ffffff; --soft: #e8f0ec; --warn: #9a5b00; --bad: #b3372b; --code: #f1f3f2;
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111518; --panel: #171c20; --ink: #e4e9ec; --muted: #94a2ad; --line: #2a3238;
    --accent: #6cc3a3; --accent-ink: #0d1a15; --soft: #1c2a25; --warn: #e2a24a; --bad: #ef7b6e; --code: #1f262b; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
a { color: var(--accent); }
.wrap { max-width: 1080px; margin: 0 auto; padding-inline: 20px; }
header.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
header.top .wrap { display: flex; align-items: center; gap: 22px; height: 60px; }
.brand { font-weight: 750; font-size: 19px; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.brand span { color: var(--accent); }
header.top nav { display: flex; gap: 18px; flex: 1; flex-wrap: wrap; }
header.top nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
header.top nav a:hover { color: var(--ink); }
.btn { display: inline-block; border: 0; border-radius: 9px; padding: 10px 18px; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; background: var(--accent); color: var(--accent-ink); }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn.small { padding: 6px 12px; font-size: 14px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.hero { padding-block: 72px 48px; }
.hero h1 { font-size: clamp(32px, 5vw, 52px); line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 18px; max-width: 820px; }
.hero p.lead { font-size: 19px; color: var(--muted); max-width: 680px; margin: 0 0 28px; }
.pill { display: inline-block; background: var(--soft); color: var(--accent); border-radius: 99px; padding: 4px 12px; font-size: 13px; font-weight: 600; margin-bottom: 18px; }
section.block { padding-block: 48px; border-top: 1px solid var(--line); }
section.block h2 { font-size: 28px; letter-spacing: -0.01em; margin: 0 0 8px; }
section.block p.sub { color: var(--muted); margin: 0 0 28px; max-width: 720px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card .big { font-size: 34px; font-weight: 750; letter-spacing: -0.02em; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13.5px; }
code { background: var(--code); padding: 1px 6px; border-radius: 5px; }
pre { background: var(--code); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; overflow-x: auto; margin: 0; }
pre code { background: none; padding: 0; }
.tw { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 13px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.price-hero { display: flex; flex-wrap: wrap; gap: 16px; align-items: stretch; margin-bottom: 24px; }
.price-hero .card { flex: 1 1 260px; }
.calc { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); align-items: end; }
label { display: block; font-size: 14px; color: var(--muted); margin-bottom: 4px; }
input, select { width: 100%; font: inherit; padding: 9px 12px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.tabs button { background: transparent; border: 1px solid var(--line); color: var(--muted); border-radius: 8px; padding: 6px 12px; font: inherit; font-size: 14px; cursor: pointer; }
.tabs button.on { background: var(--soft); color: var(--accent); border-color: transparent; font-weight: 600; }
.note { background: var(--soft); border-radius: 10px; padding: 12px 16px; font-size: 15px; }
.warn { color: var(--warn); }
.bad { color: var(--bad); }
.ok { color: var(--accent); }
footer.bottom { border-top: 1px solid var(--line); padding-block: 28px; color: var(--muted); font-size: 14px; }
.keybox { font-family: ui-monospace, Menlo, monospace; word-break: break-all; background: var(--code); border: 1px dashed var(--accent); border-radius: 8px; padding: 10px 12px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.stack > * + * { margin-top: 12px; }
@media (max-width: 640px) { header.top nav { display: none; } .hero { padding-block: 44px 28px; } }