/* Decision tool — AI-Resilient Assessment Kit (MIT licensed).
   High-contrast, keyboard-first, no motion, reflows to 320px. */

:root {
  --ink: #1b1b1b;
  --paper: #ffffff;
  --accent: #0b3d91;      /* 9.3:1 on white */
  --accent-ink: #ffffff;
  --line: #6b6b6b;        /* 4.8:1 on white */
  --soft: #f2f2f2;
  --focus: #b35c00;       /* 4.6:1 on white */
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  padding: 0 1rem 3rem;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  max-width: 46rem;
}

header { padding-top: 1rem; }
h1 { font-size: 1.6rem; line-height: 1.25; margin: 0.2rem 0 1rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.1rem; }

.crumb { font-size: 0.95rem; margin: 0; }
.crumb a { color: var(--accent); }

fieldset {
  border: 2px solid var(--line);
  border-radius: 6px;
  margin: 1.25rem 0;
  padding: 0.75rem 1rem 1rem;
}

legend {
  font-weight: 700;
  padding: 0 0.4rem;
  font-size: 1.05rem;
}

.hint { color: #333; font-size: 0.98rem; margin: 0.15rem 0 0.6rem; }

.choice {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.45rem 0.5rem;
  border-radius: 4px;
}

.choice:hover { background: var(--soft); }

.choice input[type="radio"] {
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.2rem;
  flex: none;
}

.choice label { flex: 1; cursor: pointer; }

/* Visible focus everywhere */
a:focus-visible, button:focus-visible, input:focus-visible, [tabindex="-1"]:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

button {
  font: inherit;
  font-weight: 600;
  padding: 0.6rem 1.1rem;
  border-radius: 6px;
  border: 2px solid var(--accent);
  background: var(--paper);
  color: var(--accent);
  cursor: pointer;
}

button#btn-submit {
  background: var(--accent);
  color: var(--accent-ink);
}

button:disabled { opacity: 0.45; cursor: not-allowed; }

#results { border-top: 3px solid var(--accent); margin-top: 2rem; padding-top: 0.5rem; }

.card {
  border: 2px solid var(--line);
  border-radius: 6px;
  padding: 0.9rem 1rem;
  margin: 1rem 0;
}

.card h3 { margin: 0 0 0.25rem; font-size: 1.15rem; }
.card .desc { margin: 0 0 0.6rem; }
.card .why {
  background: var(--soft);
  border-left: 4px solid var(--accent);
  padding: 0.5rem 0.75rem;
  margin: 0 0 0.6rem;
}
.card ul { margin: 0.25rem 0 0; padding-left: 1.2rem; }

.note {
  border: 2px dashed var(--line);
  padding: 0.8rem 1rem;
  margin-top: 1.5rem;
}

.error-msg {
  border: 2px solid #8a1c1c;
  background: #fdf0f0;
  color: #8a1c1c;
  font-weight: 700;
  padding: 0.6rem 0.8rem;
  margin: 1rem 0;
}

.warn {
  border: 2px solid var(--focus);
  background: #fff7ec;
  color: #6b4100;        /* 7.0:1 on the #fff7ec background */
  font-weight: 700;
  padding: 0.6rem 0.8rem;
  margin: 1rem 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0.5rem 0.9rem;
}
.skip-link:focus { left: 0.5rem; top: 0.5rem; z-index: 10; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}

@media (max-width: 360px) {
  body { padding: 0 0.6rem 2.5rem; }
  .controls { flex-direction: column; align-items: stretch; }
  button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

@media print {
  .controls, .skip-link { display: none; }
  .card { break-inside: avoid; }
}