:root {
  --bg: #f6f6f2;
  --card: #ffffff;
  --ink: #17191b;
  --muted: #5b6066;
  --line: #e2e2db;
  --accent: #0d7068;
  --accent-ink: #ffffff;
  --ok: #157a3c;
  --bad: #b42318;
  --wait: #8a5a00;
  --code: #f0f0ea;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.04), 0 4px 16px rgb(0 0 0 / 0.04);
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1012;
    --card: #15181b;
    --ink: #e7e9eb;
    --muted: #9aa1a8;
    --line: #262a2f;
    --accent: #2fc1b0;
    --accent-ink: #062320;
    --ok: #4ade80;
    --bad: #f87171;
    --wait: #fbbf24;
    --code: #1b1f23;
    --shadow: none;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0e1012;
  --card: #15181b;
  --ink: #e7e9eb;
  --muted: #9aa1a8;
  --line: #262a2f;
  --accent: #2fc1b0;
  --accent-ink: #062320;
  --ok: #4ade80;
  --bad: #f87171;
  --wait: #fbbf24;
  --code: #1b1f23;
  --shadow: none;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 16px; }

.top { border-bottom: 1px solid var(--line); background: var(--card); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 56px; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; letter-spacing: -0.01em; }
.top nav { display: flex; gap: 18px; font-size: 14px; }
.top nav a { color: var(--muted); text-decoration: none; }
.top nav a:hover { color: var(--ink); }

.intro { padding: 40px 0 8px; }
h1 { font-size: clamp(26px, 4.4vw, 38px); line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 14px; max-width: 22ch; }
.lede { font-size: 17px; color: var(--muted); max-width: 64ch; margin: 0; }
.banner { margin: 18px 0 0; padding: 10px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); font-size: 14px; }
.banner strong { color: var(--wait); }

.steps { list-style: none; padding: 0; margin: 28px 0; display: grid; gap: 16px; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px; box-shadow: var(--shadow); }
.step[data-locked] { opacity: 0.55; }
.step-head { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; }
.step-head h2 { font-size: 19px; margin: 0; letter-spacing: -0.01em; }
.num { width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; font-size: 14px; font-weight: 700; background: var(--code); color: var(--muted); flex: none; }
.step.done .num { background: var(--accent); color: var(--accent-ink); }
.hint { color: var(--muted); font-size: 14px; margin: 4px 0 14px; }

button, .file-button span {
  font: inherit; font-size: 15px; font-weight: 600; border-radius: 10px; padding: 10px 16px; cursor: pointer;
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
}
button.primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
button:disabled { opacity: 0.45; cursor: not-allowed; }
button:focus-visible, .file-button input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }

.samples { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 10px; }
.sample { text-align: left; padding: 14px; border-radius: 12px; font-weight: 400; display: grid; gap: 2px; }
.sample strong { font-size: 15px; }
.sample small { color: var(--muted); font-size: 13px; }
.sample[aria-pressed="true"] { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.own-file { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; margin-top: 14px; }
.file-button input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.file-button span { display: inline-block; }
.status { margin-top: 12px; font-size: 14px; color: var(--muted); min-height: 1.2em; }
.status.error { color: var(--bad); }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 13px; }
td.gt { font-family: var(--mono); font-weight: 600; white-space: nowrap; }
td.var { font-family: var(--mono); font-size: 12.5px; color: var(--muted); white-space: nowrap; }
.table-scroll { overflow-x: auto; }
.muted { color: var(--muted); }

details { margin-top: 12px; }
summary { cursor: pointer; font-size: 14px; color: var(--muted); }
pre, code { font-family: var(--mono); font-size: 12.5px; }
pre { background: var(--code); border-radius: 10px; padding: 12px; overflow: auto; max-height: 260px; white-space: pre-wrap; word-break: break-all; margin: 8px 0 0; }

.checks { list-style: none; padding: 0; margin: 10px 0 0; display: grid; gap: 8px; }
h3.group { font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); margin: 18px 0 0; font-weight: 650; }
.check { display: grid; grid-template-columns: 22px 1fr; gap: 10px; align-items: start; }
.mark { width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; font-size: 13px; font-weight: 800; }
.mark.ok { background: color-mix(in srgb, var(--ok) 16%, transparent); color: var(--ok); }
.mark.bad { background: color-mix(in srgb, var(--bad) 16%, transparent); color: var(--bad); }
.mark.skip { background: var(--code); color: var(--muted); }
.check .label { font-weight: 600; font-size: 15px; }
.check .detail { color: var(--muted); font-size: 13px; }
.check .where { font-size: 12px; color: var(--muted); font-family: var(--mono); }
.verdict { margin-top: 14px; padding: 12px 14px; border-radius: 10px; font-weight: 600; }
.verdict.ok { background: color-mix(in srgb, var(--ok) 12%, transparent); color: var(--ok); }
.verdict.bad { background: color-mix(in srgb, var(--bad) 12%, transparent); color: var(--bad); }
.kv { display: grid; grid-template-columns: max-content 1fr; gap: 4px 14px; font-size: 13px; margin-top: 12px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; font-family: var(--mono); word-break: break-all; }

.reading-text { margin-top: 16px; padding: 18px; border-radius: 12px; background: var(--code); }
.reading-text h3 { font-size: 16px; margin: 14px 0 4px; }
.reading-text h3:first-child { margin-top: 0; }
.reading-text p { margin: 0 0 8px; }
.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; vertical-align: -2px; margin-right: 8px; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation: none; } }

.coins { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
.coins button { font-weight: 500; padding: 8px 12px; }
.coins button[aria-pressed="true"] { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.quote { margin-top: 12px; padding: 14px; border-radius: 12px; background: var(--code); font-size: 14px; }
.quote .amount { font-size: 22px; font-weight: 700; font-family: var(--mono); }
.quote .addr { font-family: var(--mono); font-size: 13px; word-break: break-all; }
input[type="text"] { font: inherit; font-size: 14px; padding: 9px 11px; border-radius: 9px; border: 1px solid var(--line); background: var(--card); color: var(--ink); width: 100%; }

.how { padding: 8px 0 24px; }
.how h2 { font-size: 22px; letter-spacing: -0.01em; }
.how h3 { font-size: 16px; margin-top: 20px; }
.how li { margin-bottom: 8px; color: var(--ink); }
.how li strong { font-weight: 650; }
.foot { border-top: 1px solid var(--line); padding-top: 16px; padding-bottom: 40px; color: var(--muted); font-size: 13px; }

@media (max-width: 560px) {
  .step { padding: 16px; }
  .top nav { gap: 12px; }
  /* The trait table becomes one small card per trait: name and genotype on top, the result below. */
  .table-scroll table, .table-scroll tbody, .table-scroll td { display: block; }
  .table-scroll thead { display: none; }
  .table-scroll tr { display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; padding: 12px 0; border-bottom: 1px solid var(--line); }
  .table-scroll td { border: 0; padding: 0; }
  .table-scroll td.var { display: none; }
  .table-scroll td.gt { grid-column: 2; grid-row: 1; text-align: right; }
  .table-scroll td:last-child { grid-column: 1 / -1; }
}