:root {
  --ink: #14213d; --ink-2: #3d4a66; --muted: #6b7489; --paper: #fbfaf7; --card: #ffffff;
  --line: #e4e1d8; --green: #1f7a4d; --green-bg: #e7f4ec; --amber: #9a5b00; --amber-bg: #fdf1dc;
  --red: #a42a2a; --radius: 12px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font: 16px/1.55 ui-sans-serif, -apple-system, "Segoe UI", Inter, Roboto, sans-serif;
  color: var(--ink); background: var(--paper); -webkit-text-size-adjust: 100%; }
a { color: var(--green); }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
header.nav { position: sticky; top: 0; z-index: 10; background: rgba(251,250,247,.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line); }
header.nav .wrap { display: flex; align-items: center; gap: 20px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; color: var(--ink);
  text-decoration: none; letter-spacing: -.01em; }
.brand img { width: 30px; height: 30px; }
nav.links { margin-left: auto; display: flex; gap: 18px; font-size: 15px; }
nav.links a { color: var(--ink-2); text-decoration: none; }
nav.links a:hover { color: var(--ink); }
@media (max-width: 640px) { nav.links a.hide-sm { display: none; } }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 0 20px;
  border-radius: 10px; border: 1px solid var(--ink); background: var(--ink); color: #fff; font: inherit;
  font-weight: 600; text-decoration: none; cursor: pointer; }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.small { min-height: 36px; padding: 0 12px; font-size: 14px; }
.btn:disabled { opacity: .5; cursor: wait; }
h1 { font-size: clamp(34px, 6vw, 56px); line-height: 1.05; letter-spacing: -.03em; margin: 0 0 18px; }
h2 { font-size: clamp(26px, 4vw, 36px); letter-spacing: -.02em; line-height: 1.15; margin: 0 0 12px; }
h3 { font-size: 18px; margin: 0 0 6px; }
.lede { font-size: clamp(17px, 2.2vw, 20px); color: var(--ink-2); max-width: 620px; }
section { padding: 64px 0; border-bottom: 1px solid var(--line); }
.hero { padding: 72px 0 56px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: 13px; font-weight: 700; color: var(--green); margin-bottom: 10px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 820px) { .grid3, .grid2 { grid-template-columns: 1fr; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .92em; }
.addr { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; background: var(--ink); color: #fff;
  border-radius: 10px; padding: 12px 14px; font-family: ui-monospace, Menlo, monospace; font-size: 15px; word-break: break-all; }
.addr button { margin-left: auto; background: #fff; color: var(--ink); border: 0; border-radius: 7px; padding: 6px 10px; font-weight: 600; cursor: pointer; }
.drop { border: 2px dashed var(--line); border-radius: var(--radius); padding: 26px; text-align: center; background: #fff; cursor: pointer; }
.drop.over { border-color: var(--green); background: var(--green-bg); }
.samples { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.result { margin-top: 16px; display: none; }
.result.show { display: block; }
.kv { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; font-size: 15px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; font-weight: 600; }
.pill { display: inline-block; padding: 2px 10px; border-radius: 99px; font-size: 13px; font-weight: 700; }
.pill.ok { background: var(--green-bg); color: var(--green); }
.pill.review { background: var(--amber-bg); color: var(--amber); }
.pill.fail { background: #fbe7e7; color: var(--red); }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); background: #faf9f5; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tr:last-child td { border-bottom: 0; }
.sheet-frame { width: 100%; height: 420px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.price { font-size: 40px; font-weight: 800; letter-spacing: -.02em; }
.price small { font-size: 16px; font-weight: 500; color: var(--muted); }
ul.ticks { list-style: none; padding: 0; margin: 14px 0 0; }
ul.ticks li { padding-left: 26px; position: relative; margin: 6px 0; }
ul.ticks li::before { content: ""; position: absolute; left: 4px; top: 7px; width: 10px; height: 6px;
  border-left: 2.5px solid var(--green); border-bottom: 2.5px solid var(--green); transform: rotate(-45deg); }
.featured { border: 2px solid var(--ink); }
details { border-bottom: 1px solid var(--line); padding: 14px 0; }
details summary { font-weight: 600; cursor: pointer; }
footer { padding: 36px 0 50px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 14px 26px; align-items: center; }
footer a { color: var(--ink-2); }
.prose { max-width: 720px; }
.prose h2 { margin-top: 36px; font-size: 24px; }
.stat { font-size: 30px; font-weight: 800; letter-spacing: -.02em; }
.err { color: var(--red); font-weight: 600; }