:root {
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg: #e9eef5;
  --card: #ffffff;
  --accent: #0f172a;
  --bad: #b91c1c;
  --bad-bg: #fef2f2;
  --ok: #047857;
  --ok-bg: #ecfdf5;
  --info: #334155;
  --info-bg: #f1f5f9;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.5 "Segoe UI", system-ui, -apple-system, Arial, sans-serif; }

/* One card, centered on the page. Short screens sit in the middle; long ones start at the top. */
.stage { min-height: 100vh; display: flex; flex-direction: column; padding: 28px 16px; }
.shell { width: 100%; max-width: 560px; margin: auto; background: var(--card); border: 1px solid var(--line); border-radius: 18px; box-shadow: 0 12px 36px rgba(15, 23, 42, 0.12); overflow: hidden; }
.brand { background: var(--ink); color: #fff; padding: 16px 22px; display: flex; flex-direction: column; gap: 2px; }
.brand span { color: #94a3b8; font-size: 12px; }

/* Sections inside the card are separated by thin lines, not separate boxes. */
#app > .card { padding: 22px; }
#app > .card + .card { border-top: 1px solid var(--line); }
.pad { padding: 22px; margin: 0; }

h1 { font-size: 20px; margin: 0 0 6px; }
h2 { font-size: 15px; margin: 0 0 10px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.who { display: inline-block; background: #eef2ff; color: #3730a3; border-radius: 999px; padding: 2px 10px; font-size: 12px; margin-top: 6px; }
.specs { width: 100%; border-collapse: collapse; }
.specs th { text-align: left; width: 38%; color: var(--muted); font-weight: 500; padding: 5px 8px 5px 0; vertical-align: top; }
.specs td { padding: 5px 0; word-break: break-word; }
.q { border-top: 1px solid var(--line); padding: 14px 0; }
.q:first-of-type { border-top: 0; }
.q-label { font-weight: 600; margin-bottom: 8px; }
.choices { display: flex; gap: 10px; }
.choice { flex: 1; }
.choice input { position: absolute; opacity: 0; pointer-events: none; }
.choice span { display: block; text-align: center; padding: 10px 0; border: 1px solid #cbd5e1; border-radius: 8px; cursor: pointer; font-weight: 600; background: #fff; }
.choice input:focus-visible + span { outline: 2px solid #6366f1; outline-offset: 2px; }
.choice input:checked + span.yes { background: var(--ok-bg); border-color: var(--ok); color: var(--ok); }
.choice input:checked + span.no { background: var(--bad-bg); border-color: var(--bad); color: var(--bad); }
textarea { width: 100%; margin-top: 10px; padding: 10px; border: 1px solid #cbd5e1; border-radius: 8px; font: inherit; min-height: 76px; resize: vertical; }
.note-label { display: block; font-size: 13px; color: var(--muted); margin-top: 10px; }
.err { color: var(--bad); font-size: 13px; margin-top: 6px; }
.btn { display: inline-block; background: var(--accent); color: #fff; border: 0; border-radius: 8px; padding: 12px 20px; font: inherit; font-weight: 600; cursor: pointer; }
.btn.secondary { background: #fff; color: var(--ink); border: 1px solid #cbd5e1; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.banner { border-radius: 8px; padding: 12px 14px; margin: 12px 0; }
.banner.bad { background: var(--bad-bg); color: var(--bad); }
.banner.good { background: var(--ok-bg); color: var(--ok); }
.banner.info { background: var(--info-bg); color: var(--info); }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 8px; }
footer.credit { text-align: center; font-size: 12px; color: #94a3b8; margin-top: 18px; }
footer.credit a { color: #94a3b8; text-decoration: underline; }
footer.credit a:hover { color: #64748b; }

@media (max-width: 520px) {
  .stage { padding: 12px; }
  .shell { border-radius: 14px; }
  #app > .card { padding: 18px; }
}