@font-face { font-family: Inter; font-weight: 400; src: url("fonts/Inter-Regular.ttf"); font-display: swap; }
@font-face { font-family: Inter; font-weight: 600; src: url("fonts/Inter-SemiBold.ttf"); font-display: swap; }
@font-face { font-family: Inter; font-weight: 700; src: url("fonts/Inter-Bold.ttf"); font-display: swap; }
:root {
  --ink: #182030; --quiet: #545e70; --accent: #c45416; --accent-ink: #a8460f; --page: #eef1f5; --box: #ffffff; --edge: #bac2cf; --soft: #f6f7fa;
  --right: #166a3b; --right-bg: #e4f4ea; --wrong: #b3261e; --wrong-bg: #fbeae8; --series3: #2c5f9e; --warn-bg: #fff4e0;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--page); color: var(--ink); font: 400 17px/1.5 Inter, system-ui, sans-serif; }
a { color: var(--accent-ink); }
h1 { font-size: 30px; line-height: 1.15; margin: 10px 0 8px; }
h2 { font-size: 20px; margin: 0 0 8px; }
h2.sub { margin: 32px 0 8px; }
.top { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 20px; background: var(--box); border-bottom: 1px solid var(--edge); }
.top nav { display: flex; gap: 12px; align-items: center; }
.brand { font-weight: 700; color: var(--ink); text-decoration: none; }
.who { color: var(--quiet); font-size: 14px; overflow-wrap: anywhere; }
.devbar { background: var(--warn-bg); padding: 6px 20px; font-size: 14px; }
.page { max-width: 820px; margin: 0 auto; padding: 24px 16px 40px; }
.exam { max-width: 1140px; margin: 0 auto; padding: 16px 16px 40px; }
.foot { max-width: 820px; margin: 0 auto; padding: 8px 16px 32px; color: var(--quiet); font-size: 13px; }
.chip { display: inline-block; background: var(--accent); color: #fff; font-weight: 600; font-size: 14px; padding: 3px 10px; border-radius: 6px; }
.lede { font-size: 18px; }
.cards { display: grid; gap: 14px; margin-top: 18px; }
.card, .review, .casebox, .confirm, .break { background: var(--box); border: 1px solid var(--edge); border-radius: 10px; padding: 18px; }
.btn { display: inline-block; font: 600 16px Inter, system-ui, sans-serif; min-height: 44px; padding: 10px 18px; border-radius: 8px; background: var(--accent); color: #fff; border: 1px solid var(--accent); text-decoration: none; cursor: pointer; }
.btn.quiet { background: var(--box); color: var(--ink); border-color: var(--edge); }
.btn:disabled { opacity: .45; cursor: default; }
.link { background: none; border: 0; padding: 4px; font: inherit; color: var(--accent-ink); text-decoration: underline; cursor: pointer; }
.link[aria-pressed="true"] { font-weight: 700; text-decoration: none; color: var(--ink); }
:focus-visible { outline: 3px solid var(--series3); outline-offset: 2px; }
.warn { background: var(--warn-bg); border-radius: 8px; padding: 8px 12px; font-size: 15px; }
.error { color: var(--wrong); }
.stack { display: grid; gap: 10px; max-width: 460px; }
input[type=email], textarea, select { font: inherit; padding: 10px; border: 1px solid var(--edge); border-radius: 8px; width: 100%; background: var(--box); color: var(--ink); }
.past { padding-left: 20px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.quiet { color: var(--quiet); }
.loading { padding: 40px 0; }
.bar { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 16px; padding-bottom: 12px; border-bottom: 1px solid var(--edge); margin-bottom: 16px; }
.barright { display: flex; flex-wrap: wrap; gap: 4px 16px; }
.timer { font-variant-numeric: tabular-nums; }
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 24px; align-items: start; }
.qhead { font-size: 18px; color: var(--quiet); font-weight: 600; margin: 0 0 10px; }
.stem { font-size: 19px; line-height: 1.5; }
.hint { font-weight: 600; margin: 0 0 8px; }
.casebox { margin-bottom: 14px; background: var(--soft); }
.casebox h2 { font-size: 16px; }
.casebox p { margin: 0; }
.choices { border: 0; padding: 0; margin: 0; display: grid; gap: 10px; }
.choice { display: flex; gap: 10px; align-items: flex-start; background: var(--box); border: 1px solid var(--edge); border-radius: 10px; padding: 12px 14px; cursor: pointer; }
.choice:has(input:checked) { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.choice input { margin-top: 5px; width: 18px; height: 18px; flex: none; accent-color: var(--accent); }
.key { font-weight: 700; }
.matches { display: grid; gap: 14px; }
.match label { display: block; font-weight: 600; margin-bottom: 4px; }
.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.actions { margin: 16px 0; }
.flag { display: inline-flex; gap: 6px; align-items: center; min-height: 44px; cursor: pointer; }
.finish { background: var(--box); color: var(--ink); border-color: var(--ink); }
.confirm { margin-top: 12px; }
.confirm p { margin: 0 0 8px; }
.side { position: sticky; top: 12px; background: var(--box); border: 1px solid var(--edge); border-radius: 10px; padding: 14px; max-height: calc(100vh - 24px); overflow: auto; }
.side h2 { font-size: 15px; }
.nav { display: grid; grid-template-columns: repeat(auto-fill, minmax(44px, 1fr)); gap: 6px; }
.navb { min-height: 40px; border: 1px solid var(--edge); background: var(--box); border-radius: 6px; font: 600 13px Inter, system-ui, sans-serif; color: var(--ink); cursor: pointer; }
.navb.done { background: #dfe5ee; }
.navb.flagged { border-color: var(--accent-ink); color: var(--accent-ink); }
.navb.here { outline: 2px solid var(--ink); outline-offset: 1px; }
.hero { display: flex; gap: 16px; align-items: center; margin-bottom: 8px; }
.hero h1 { margin-bottom: 4px; }
.atlas { width: 96px; height: 96px; flex: none; display: block; }
.atlas-fig { margin: 0; flex: none; text-align: center; }
.atlas-fig figcaption { font-size: 12px; color: var(--quiet); width: 96px; line-height: 1.25; }
.break .atlas { margin: 0 auto 4px; }
.atlas-pause { font-size: 12px; display: block; margin: 2px auto 0; }
.break { max-width: 560px; margin: 40px auto; text-align: center; }
.exhibit { overflow-x: auto; margin: 0 0 14px; background: var(--box); border: 1px solid var(--edge); border-radius: 10px; padding: 14px; }
.exhibit figcaption { font-weight: 600; margin-bottom: 6px; }
.chart { width: 100%; min-width: 520px; height: auto; display: block; margin-bottom: 10px; }
.chart text { font: 12px Inter, system-ui, sans-serif; fill: var(--quiet); }
.chart .label { font-weight: 600; font-size: 12.5px; }
.chart .axis { fill: var(--ink); }
.chart .barnum { fill: #fff; font-weight: 600; }
.chart .grid { stroke: #dfe3ea; stroke-width: 1; }
.chart .node { fill: var(--soft); stroke: var(--ink); stroke-width: 1.4; }
.chart .nodeName { font-weight: 700; fill: var(--ink); font-size: 14px; }
.tablewrap { overflow-x: auto; }
table.data { border-collapse: collapse; width: 100%; background: var(--box); font-size: 15px; }
.data th, .data td { text-align: left; padding: 7px 10px; border-bottom: 1px solid #e2e6ec; }
.data th { background: var(--soft); font-weight: 600; }
.filters { display: flex; gap: 8px; margin: 8px 0 14px; }
.review { margin-bottom: 14px; }
.review h3 { margin: 0 0 8px; font-size: 17px; }
.verdict { font-size: 14px; font-weight: 600; padding: 2px 8px; border-radius: 6px; margin-left: 6px; }
.verdict.ok { background: var(--right-bg); color: var(--right); }
.verdict.no { background: var(--wrong-bg); color: var(--wrong); }
.tag { font-size: 14px; color: var(--accent-ink); }
.opts { list-style: none; padding: 0; margin: 0 0 10px; display: grid; gap: 8px; }
.opts li { display: flex; gap: 10px; padding: 10px 12px; border: 1px solid var(--edge); border-radius: 8px; }
.opts li.right { background: var(--right-bg); border-color: var(--right); }
.opts li.wrong { background: var(--wrong-bg); border-color: var(--wrong); }
.mark { font-weight: 700; width: 18px; flex: none; }
.why { margin: 6px 0 0; color: var(--quiet); font-size: 15px; }
.rationale { margin: 8px 0; }
details.report { font-size: 14px; color: var(--quiet); }
.saved { color: var(--right); font-size: 14px; }
@media (max-width: 800px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .side { position: static; max-height: none; order: 2; }
  .stem { font-size: 18px; }
  h1 { font-size: 26px; }
  .who { display: none; }
}