:root {
  color-scheme: light;
  --ink: #1b2533;
  --muted: #536274;
  --line: #c5d0d9;
  --blue: #234f95;
  --teal: #146d60;
  --amber: #7c4d00;
  --paper: #fff;
  --panel: #edf3f7;
  --good-bg: #e0f3e9;
  --bad-bg: #fff0dd;
}

* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: #e7edf2; font: 1rem/1.62 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: #164f98; text-underline-offset: .18em; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid #e09218; outline-offset: 3px; }
.skip { position: absolute; left: -10000px; top: 0; padding: 10px; background: var(--paper); color: var(--ink); }
.skip:focus { left: 8px; z-index: 5; }
.page { width: min(1040px, calc(100% - 28px)); margin: 26px auto; padding: clamp(18px, 5vw, 54px); background: var(--paper); border: 1px solid var(--line); box-shadow: 0 8px 26px #17212d14; }
h1, h2, h3 { line-height: 1.22; }
h1 { max-width: 19ch; margin: .1em 0 .4em; font: 500 clamp(2rem, 5vw, 3.25rem)/1.12 Georgia, serif; }
h2 { font-size: clamp(1.35rem, 3vw, 1.85rem); }
.eyebrow { color: var(--teal); font-size: .77rem; font-weight: 800; letter-spacing: .12em; }
.lead { max-width: 76ch; color: var(--muted); font-size: 1.13rem; }
.model, .sources { margin: 30px 0; padding: clamp(16px, 3vw, 25px); border: 1px solid var(--line); border-radius: 10px; background: #fbfcfd; }
.records { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.records article { min-width: 0; padding: 12px 15px; border: 1px solid #9aafc2; border-top: 4px solid var(--blue); background: var(--panel); }
.records h3 { margin: 0 0 6px; font-size: 1.05rem; }
.records p { margin: 0; color: var(--muted); }
.rule, .note { margin: 17px 0 0; padding: 13px 16px; border-left: 4px solid var(--amber); background: #fff6e6; }
.cases > p { max-width: 76ch; color: var(--muted); }
.case { margin: 22px 0; padding: clamp(16px, 3vw, 24px); border: 1px solid var(--line); border-radius: 9px; background: #fff; }
.case h3 { margin-top: 0; }
.case > p { max-width: 80ch; }
fieldset { display: grid; gap: 9px; margin: 16px 0 13px; padding: 0; border: 0; }
legend { margin-bottom: 7px; font-weight: 750; }
label { display: flex; align-items: flex-start; gap: 10px; min-height: 46px; padding: 10px 12px; border: 1px solid #c5d0d9; border-radius: 7px; background: #fbfcfd; cursor: pointer; }
label:has(input:checked) { border-color: var(--blue); background: #eef4ff; }
input[type="radio"] { flex: 0 0 auto; width: 1.1rem; height: 1.1rem; margin: .22rem 0 0; accent-color: var(--blue); }
button { min-height: 44px; padding: 10px 18px; border: 0; border-radius: 6px; color: #fff; background: #174e78; font: inherit; font-weight: 750; cursor: pointer; }
button:hover { background: #103b5d; }
.feedback { min-height: 1.7em; margin-bottom: 0; padding: 10px 12px; border-left: 4px solid #8592a0; background: #f0f2f4; }
.feedback[data-result="correct"] { border-color: #146d60; background: var(--good-bg); }
.feedback[data-result="incorrect"], .feedback[data-result="incomplete"], .feedback[data-result="unavailable"] { border-color: #925b00; background: var(--bad-bg); }
.sources li { margin: 9px 0; }
code { padding: .05em .3em; background: #eef1f4; font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: .94em; overflow-wrap: anywhere; }
@media (max-width: 680px) {
  .page { margin: 0 auto; width: 100%; padding: 20px 16px 36px; border: 0; box-shadow: none; }
  .records { grid-template-columns: 1fr; }
  .case { margin: 17px 0; }
}