:root {
  --ink: #14171c;
  --muted: #5b6270;
  --line: #e3e5e8;
  --bg: #ffffff;
  --soft: #f5f6f7;
  --green: #0b6b3a;        /* highway-sign green */
  --green-ink: #ffffff;
  --yellow: #ffd23f;       /* used only as a highlight underline */
  --ok: #0b6b3a;
  --no: #b3261e;
  --radius: 10px;
}

[hidden] { display: none !important; }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: 17px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
}
main, .top, footer { max-width: 680px; margin: 0 auto; padding: 0 20px; }

.top { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-weight: 800; font-size: 20px; letter-spacing: -0.02em; color: var(--ink); text-decoration: none; }
.lang button { font: inherit; font-size: 14px; background: none; border: 1px solid var(--line); padding: 6px 10px; cursor: pointer; color: var(--muted); }
.lang button:first-child { border-radius: 8px 0 0 8px; }
.lang button:last-child { border-radius: 0 8px 8px 0; border-left: 0; }
.lang button[aria-pressed="true"] { color: var(--ink); background: var(--soft); font-weight: 600; }

h1 { font-size: clamp(32px, 7vw, 44px); line-height: 1.1; letter-spacing: -0.03em; margin: 28px 0 12px; }
h2 { font-size: 22px; line-height: 1.25; letter-spacing: -0.01em; margin: 0 0 12px; }
.lead { color: var(--muted); font-size: 19px; margin: 0 0 24px; }

.start { border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; display: grid; gap: 14px; }
.start label { display: grid; gap: 6px; font-weight: 600; font-size: 15px; }
select { font: inherit; padding: 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--ink); }
.age { border: 0; padding: 0; margin: 0; display: flex; gap: 18px; flex-wrap: wrap; }
.age legend { font-weight: 600; font-size: 15px; margin-bottom: 6px; padding: 0; }
.age label { display: inline-flex; flex-direction: row; gap: 8px; font-weight: 400; align-items: center; }
.format { margin: 0; color: var(--muted); font-size: 15px; }

button.go, .buy, #next, #again {
  font: inherit; font-weight: 700; border: 0; border-radius: 8px; padding: 14px 18px; cursor: pointer;
  background: var(--green); color: var(--green-ink); text-decoration: none; display: inline-block; text-align: center;
}
button.go { width: 100%; }
button.go:hover, .buy:hover, #next:hover, #again:hover { filter: brightness(1.08); }

.facts { list-style: none; padding: 0; margin: 28px 0; display: grid; gap: 10px; }
.facts li { padding-left: 22px; position: relative; }
.facts li::before { content: ""; position: absolute; left: 3px; top: 0.3em; width: 6px; height: 12px; border: solid var(--green); border-width: 0 3px 3px 0; transform: rotate(45deg); }

.price { border-top: 1px solid var(--line); padding: 24px 0; }
.price p { color: var(--muted); }
.faq { border-top: 1px solid var(--line); padding: 24px 0 8px; }
details { border-bottom: 1px solid var(--line); padding: 12px 0; }
summary { cursor: pointer; font-weight: 600; }
details p { color: var(--muted); margin: 8px 0 0; }

#quiz, #result, #paywall { padding: 20px 0 40px; }
.bar { display: flex; justify-content: space-between; color: var(--muted); font-size: 14px; margin-bottom: 6px; }
progress { width: 100%; height: 6px; appearance: none; border: 0; border-radius: 3px; background: var(--soft); overflow: hidden; }
progress::-webkit-progress-bar { background: var(--soft); }
progress::-webkit-progress-value { background: var(--green); }
progress::-moz-progress-bar { background: var(--green); }
#question { margin: 22px 0 16px; font-size: 22px; outline: none; }
.choices { display: grid; gap: 10px; }
.choices button {
  font: inherit; text-align: left; padding: 14px 16px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--ink); cursor: pointer;
}
.choices button:hover:not(:disabled) { border-color: var(--ink); }
.choices button.ok { border-color: var(--ok); box-shadow: inset 4px 0 0 var(--ok); }
.choices button.no { border-color: var(--no); box-shadow: inset 4px 0 0 var(--no); }
.choices button:disabled { cursor: default; color: var(--ink); }

.feedback { margin-top: 18px; border-top: 1px solid var(--line); padding-top: 14px; }
#verdict { font-weight: 700; margin: 0 0 6px; }
#verdict.ok { color: var(--ok); }
#verdict.no { color: var(--no); }
#explain { margin: 0 0 10px; }
blockquote { margin: 0 0 8px; padding: 10px 14px; background: var(--soft); border-radius: 8px; font-size: 15px; color: var(--muted); }
.cite { font-size: 14px; margin: 0 0 14px; }
.cite a { color: var(--green); }
.row { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.link { font: inherit; font-size: 14px; background: none; border: 0; color: var(--muted); text-decoration: underline; cursor: pointer; padding: 0; }

#review { margin: 18px 0; }
#review h3 { font-size: 17px; margin: 0 0 6px; }
#review a { font-size: 14px; color: var(--green); }
.source { margin-top: 28px; border-top: 1px solid var(--line); padding-top: 16px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips button { font: inherit; font-size: 14px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); cursor: pointer; color: var(--ink); }

footer { border-top: 1px solid var(--line); margin-top: 32px; padding-top: 16px; padding-bottom: 40px; color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); }
:focus-visible { outline: 3px solid var(--yellow); outline-offset: 2px; }

.doc h1 { font-size: 32px; }
.doc h2 { font-size: 19px; margin-top: 24px; }
.doc p { color: var(--ink); }

.top .other { font-size: 14px; color: var(--muted); }
.sq { border-top: 1px solid var(--line); padding: 14px 0; }
.sq h3 { font-size: 18px; margin: 0 0 8px; }
.sq ol { margin: 0 0 8px; padding-left: 22px; }

.doc a { color: var(--green); }