:root {
  color-scheme: light;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --r-m: 12px; --r-l: 24px; --r-pill: 999px;
  --bg: #ffffff; --layer-1: #f2f2f2; --layer-2: #ffffff; --layer-3: #e6e6e6;
  --line: #ebebeb; --line-strong: #bfbfbf;
  --text: #171717; --text-2: #4d4d4d; --text-3: #808080;
  --brand: #4353f3; --brand-weak: #ebecff; --brand-text: #3442d6;
  --success: #1dd3a2; --success-weak: #e5fbf5; --success-text: #0b7356;
  --danger: #ff4d4d; --danger-weak: #ffeded; --danger-text: #c41f1f;
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0d0d0d; --layer-1: #171717; --layer-2: #1f1f1f; --layer-3: #333333;
    --line: #262626; --line-strong: #404040;
    --text: #ffffff; --text-2: #a6a6a6; --text-3: #666666;
    --brand-weak: #1b1d35; --brand-text: #8a95ff;
    --success-weak: #153129; --success-text: #1dd3a2;
    --danger-weak: #371d1d; --danger-text: #ff6b6b;
  }
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: var(--bg); color: var(--text); font: 400 15px/1.45 var(--font); accent-color: var(--brand); }
p { margin: 0; }
[hidden] { display: none !important; }

.small { font: 500 13px/1.3 var(--font); }
.label { font: 500 15px/1.3 var(--font); }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.muted { color: var(--text-2); }
.title { font: 600 18px/1.25 var(--font); }
.h2 { font: 600 24px/1.1 var(--font); margin: 0; }
.stack { display: flex; flex-direction: column; gap: 16px; }
.row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }

header.top { position: sticky; top: 0; z-index: 5; background: var(--bg); border-bottom: 1px solid var(--line); }
.top-in { max-width: 720px; margin: 0 auto; padding: 12px 16px; display: flex; gap: 12px; align-items: center; }
.bag { flex: none; width: 34px; height: 52px; color: var(--brand); }
.top-txt { flex: 1; min-width: 0; }
.top-txt .title { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.prog-row { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
.prog-row progress { flex: 1; }

.wrap { max-width: 720px; margin: 0 auto; padding: 16px 16px 48px; }
.sub { margin: 8px 0 16px; color: var(--text-2); }
.card { background: var(--layer-1); border-radius: var(--r-l); padding: 20px; margin-bottom: 16px; }
.fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.field { display: grid; gap: 6px; color: var(--text-2); }
.field input { height: 44px; padding: 0 14px; border: 1px solid var(--line-strong); border-radius: var(--r-m); background: var(--layer-2); color: var(--text); font: 400 15px/1 var(--font); }
.field input:focus-visible { outline: 3px solid var(--brand); outline-offset: 1px; border-color: var(--brand); }
.field.missing span { color: var(--danger-text); }
.field.missing input { border-color: var(--danger); }
.legend { display: flex; flex-wrap: wrap; gap: 4px 12px; color: var(--text-2); }

.tabs { display: flex; gap: 2px; padding: 4px; margin-bottom: 16px; overflow-x: auto; border-radius: var(--r-pill); background: var(--layer-1); }
.tab { flex: 1; height: 40px; padding: 0 16px; border: 0; border-radius: var(--r-pill); background: none; color: var(--text-2); font: 600 13px/1 var(--font); white-space: nowrap; cursor: pointer; }
.tab[aria-selected="true"] { background: var(--layer-2); color: var(--text); box-shadow: 0 0 0 1px var(--line-strong) inset; }

.sec-head { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 8px; }
.sec-head svg { flex: none; color: var(--brand); }
.group-label { margin: 24px 0 8px; color: var(--brand-text); font-weight: 600; }
.item { padding: 16px 0; border-top: 1px solid var(--line); }
.item.missing .q { color: var(--danger-text); }
.q { margin: 0 0 12px; display: flex; gap: 8px; }
.code { font-family: var(--mono); font-size: 12px; color: var(--text-2); flex: none; min-width: 38px; padding-top: 3px; }
.scale { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.scale label { position: relative; display: block; }
.scale input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.scale span { display: flex; align-items: center; justify-content: center; height: 44px; border: 1px solid var(--line); border-radius: var(--r-m); background: var(--layer-1); font-weight: 600; font-size: 16px; }
.scale input:checked + span { background: var(--brand); border-color: var(--brand); color: #fff; }
.scale input:focus-visible + span { outline: 3px solid var(--brand); outline-offset: 2px; }
.ends { display: flex; justify-content: space-between; margin-top: 4px; color: var(--text-2); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; height: 44px; padding: 0 18px; border: 1px solid var(--line-strong); border-radius: var(--r-pill); background: var(--layer-2); color: var(--text); font: 600 14px/1 var(--font); cursor: pointer; transition: scale .2s; }
.btn:hover:not(:disabled) { scale: 1.03; }
.btn:disabled { opacity: .5; cursor: default; }
.btn:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; }
.btn-primary { border: 0; background: linear-gradient(90deg, #3e4de8, #4b5af4); color: #fff; height: 52px; font-size: 15px; }
.btn-ghost { border-color: transparent; background: transparent; color: var(--text-2); }
.btn-xs { height: 36px; padding: 0 14px; font-size: 13px; align-self: flex-start; }
.nav { display: flex; gap: 12px; justify-content: space-between; margin-top: 24px; flex-wrap: wrap; }
.nav .btn-primary { flex: 1; min-width: 220px; }

.alert { display: grid; gap: 4px; padding: 12px 16px; margin-top: 16px; border-radius: var(--r-m); background: var(--layer-2); }
.alert strong { font-weight: 600; }
.alert-success { background: var(--success-weak); }
.alert-success strong { color: var(--success-text); }
.alert-danger { background: var(--danger-weak); }
.alert-danger strong { color: var(--danger-text); }

.progress { display: block; width: 100%; height: 8px; border: 0; border-radius: var(--r-pill); overflow: hidden; appearance: none; background: var(--layer-3); color: var(--brand); }
.progress::-webkit-progress-bar { background: transparent; }
.progress::-webkit-progress-value { border-radius: var(--r-pill); background: currentColor; transition: inline-size .3s; }
.progress::-moz-progress-bar { border-radius: var(--r-pill); background: currentColor; }

.ok { color: var(--success); }
.tag { display: inline-flex; align-items: center; height: 23px; padding: 0 10px; border-radius: var(--r-pill); background: var(--brand-weak); color: var(--brand-text); font: 500 11px/1 var(--mono); text-transform: uppercase; }
.score { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.gauge { width: 140px; height: 140px; flex: none; font-family: var(--font); }
.bars { display: grid; gap: 10px; flex: 1; min-width: 200px; }
.bars div { display: grid; grid-template-columns: 80px 1fr 34px; align-items: center; gap: 8px; }
pre.data { background: var(--layer-2); border-radius: var(--r-m); padding: 12px; font-family: var(--mono); font-size: 12px; white-space: pre-wrap; word-break: break-all; margin: 0; max-height: 320px; overflow: auto; }

.slogan { text-align: center; color: var(--brand-text); margin-top: 32px; font-weight: 600; letter-spacing: .02em; }
.ecg { display: block; margin: 6px auto 0; color: var(--brand); }

@media (prefers-reduced-motion: reduce) {
  .btn, .progress::-webkit-progress-value { transition: none; }
  .btn:hover:not(:disabled) { scale: none; }
}