:root {
  --bg: #f4f6fb; --surface: #fff; --border: #e4e8f0; --text: #0f172a; --muted: #64748b;
  --primary: #4f46e5; --danger: #dc2626; --danger-soft: #fef2f2; --warn: #b45309; --warn-soft: #fffbeb;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b1020; --surface: #121a2b; --border: #23304a; --text: #e8edf6; --muted: #8b97b0;
    --danger: #f87171; --danger-soft: rgba(248, 113, 113, .12); --warn: #fbbf24; --warn-soft: rgba(251, 191, 36, .12); color-scheme: dark; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.6; }
main { max-width: 640px; margin: 0 auto; padding: 32px 16px 56px; display: grid; gap: 16px; }
header { display: flex; gap: 14px; align-items: center; }
.logo { width: 44px; height: 44px; border-radius: 12px; background: var(--primary); flex: none; }
img.logo { background: none; object-fit: cover; }
h1 { font-size: 22px; line-height: 1.25; margin: 0; }
h2 { font-size: 16px; margin: 18px 0 6px; }
.card h2:first-child { margin-top: 0; }
.muted { color: var(--muted); margin: 2px 0 0; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 20px; }
ul, ol { padding-left: 20px; margin: 6px 0; }
li { margin: 4px 0; }
.warn { background: var(--warn-soft); color: var(--warn); border-radius: 10px; padding: 10px 12px; margin: 14px 0 0; }
form { display: grid; gap: 12px; }
label { display: grid; gap: 6px; font-weight: 600; font-size: 13px; }
input, textarea { font: inherit; font-weight: 400; color: var(--text); background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px 12px; width: 100%; }
input:focus, textarea:focus { outline: 2px solid var(--primary); outline-offset: 1px; }
label.check { display: flex; align-items: flex-start; gap: 10px; font-weight: 500; }
label.check input { width: 18px; height: 18px; margin-top: 3px; flex: none; accent-color: var(--danger); }
button { font: inherit; font-weight: 700; border: 0; border-radius: 10px; padding: 12px; background: var(--danger); color: #fff; cursor: pointer; }
button:disabled { opacity: .6; cursor: wait; }
.error { color: var(--danger); margin: 0; min-height: 1em; }
.done { border-color: #10b981; }
[hidden] { display: none !important; }