: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; }
.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, .workflow, .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, .callout { 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: 6px; font-weight: 750; }
label { display: flex; align-items: flex-start; gap: 10px; padding: 10px 12px; border: 1px solid #b6c3cd; border-radius: 6px; background: #f8fafb; cursor: pointer; }
label:has(input:checked) { border-color: var(--blue); background: #edf3ff; }
input[type="radio"] { width: 1.15rem; height: 1.15rem; margin: .2rem 0 0; flex: 0 0 auto; accent-color: var(--blue); }
button { min-height: 46px; padding: 10px 17px; border: 2px solid var(--blue); border-radius: 5px; background: var(--blue); color: white; font: inherit; font-weight: 750; cursor: pointer; }
button:hover { background: #183b72; }
:focus-visible { outline: 3px solid #6c45bd; outline-offset: 3px; }
.feedback { min-height: 3.1em; margin: 13px 0 0; padding: 11px 13px; border-radius: 5px; background: #edf1f4; }
.feedback[data-state="correct"] { background: var(--good-bg); color: #164b2e; }
.feedback[data-state="incorrect"] { background: var(--bad-bg); color: #613900; }
.table-scroll { overflow-x: auto; margin: 17px 0; }
table { width: 100%; min-width: 760px; border-collapse: collapse; }
th, td { padding: 10px; border: 1px solid #aebbc6; text-align: left; vertical-align: top; }
th { background: #eaf0f4; }
.sources li { margin: 9px 0; }
a { color: #174d94; text-underline-offset: 3px; }
footer { margin-top: 30px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: .92rem; }

@media (max-width: 620px) {
  .page { width: min(100% - 16px, 1040px); margin: 8px auto; padding: 20px 14px; }
  .records { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}