:root {
  --text: #555555;
  --ink: #1f1f1f;
  --red: #AC272B;
  --green: #2e7d32;
  --teal: #70979E;
  --bg: #ffffff;
  --soft: #f6f8f8;
  --line: #d9dfe0;
  --red-bg: #fdf0f0;
  --green-bg: #eff7f0;
  --teal-bg: #eef4f5;
  --bar-h: 92px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  padding: env(safe-area-inset-top) 0 calc(var(--bar-h) + env(safe-area-inset-bottom) + 16px);
}

.top {
  max-width: 640px;
  margin: 0 auto;
  padding: 20px 16px 8px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.top .logo { flex: none; width: 48px; height: 48px; border-radius: 10px; }
.top h1 { margin: 0; font-size: 1.5rem; color: var(--ink); letter-spacing: -0.01em; }
.top .sub { margin: 2px 0 0; color: var(--text); }

main { max-width: 640px; margin: 0 auto; padding: 0 16px; }

.note {
  margin: 8px 0 16px;
  padding: 10px 12px;
  border-left: 4px solid var(--teal);
  background: var(--teal-bg);
  color: var(--ink);
  font-size: 0.92rem;
}

fieldset {
  margin: 0 0 14px;
  padding: 0;
  border: 0;
  min-width: 0;
}
legend {
  padding: 0 0 6px;
  font-weight: 700;
  color: var(--ink);
}

.opt {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  padding: 8px 12px;
  margin-bottom: 6px;
  border: 1.5px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  cursor: pointer;
}
.opt input {
  flex: none;
  width: 20px;
  height: 20px;
  margin: 0;
  accent-color: var(--green);
}
.opt .txt { flex: 1; color: var(--ink); }
.opt .pts {
  flex: none;
  min-width: 28px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--text);
}
.opt:has(input:checked) {
  border-color: var(--green);
  background: var(--green-bg);
}
.opt:has(input:checked) .pts { color: var(--green); }
.opt:has(input:focus-visible) { outline: 3px solid var(--teal); outline-offset: 2px; }

fieldset.missing legend { color: var(--red); }
fieldset.missing legend::after { content: " · falta responder"; font-weight: 400; }

/* Referencia */
.ref { margin-top: 22px; }
.ref h2 { margin: 0 0 8px; font-size: 1.05rem; color: var(--ink); }
.ref table { width: 100%; border-collapse: collapse; }
.ref th, .ref td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); }
.ref th { font-size: 0.85rem; color: var(--text); font-weight: 600; }
.ref td:first-child { width: 90px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.ref tr[data-level="leve"] td:last-child { color: var(--green); font-weight: 700; }
.ref tr[data-level="grave"] td:last-child,
.ref tr[data-level="inminente"] td:last-child { color: var(--red); font-weight: 700; }
.ref tr.active td { background: var(--soft); box-shadow: inset 4px 0 0 var(--ink); }
.disc { margin: 12px 0 0; font-size: 0.85rem; }

/* Barra de resultado */
.bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: var(--bar-h);
  padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
  background: var(--bg);
  border-top: 4px solid var(--line);
  box-shadow: 0 -2px 8px rgba(0,0,0,0.06);
}
.bar > * { max-width: 640px; }
.score {
  flex: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 56px;
}
.score span { font-size: 2.2rem; line-height: 1; font-weight: 800; color: var(--ink); font-variant-numeric: tabular-nums; }
.score small { font-size: 0.75rem; }
.verdict { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.verdict strong { font-size: 1.1rem; color: var(--ink); }
.verdict span { font-size: 0.85rem; }

#reset {
  flex: none;
  min-height: 44px;
  padding: 0 16px;
  border: 1.5px solid var(--text);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
#reset:focus-visible { outline: 3px solid var(--teal); outline-offset: 2px; }

.bar[data-level="leve"]      { border-top-color: var(--green); background: var(--green-bg); }
.bar[data-level="leve"] strong, .bar[data-level="leve"] .score span { color: var(--green); }
.bar[data-level="moderado"]  { border-top-color: var(--teal);  background: var(--teal-bg); }
.bar[data-level="grave"]     { border-top-color: var(--red);   background: var(--red-bg); }
.bar[data-level="grave"] strong, .bar[data-level="grave"] .score span { color: var(--red); }
.bar[data-level="inminente"] { border-top: 8px solid var(--red); background: var(--red-bg); }
.bar[data-level="inminente"] strong, .bar[data-level="inminente"] .score span { color: var(--red); }

@media (min-width: 700px) {
  .bar { justify-content: center; }
  .bar > .verdict { max-width: 380px; }
}

@media (prefers-reduced-motion: no-preference) {
  .opt, .bar { transition: background-color .15s, border-color .15s; }
}