:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --ink: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --head: #111827;
  --taxi: #f5c518;
  --taxi-ink: #111827;
  --ok: #15803d;
  --ok-bg: #dcfce7;
  --bad: #b91c1c;
  --bad-bg: #fee2e2;
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f17;
    --card: #151b26;
    --ink: #e5e7eb;
    --muted: #9ca3af;
    --line: #273042;
    --head: #05080d;
    --ok: #4ade80;
    --ok-bg: #12301f;
    --bad: #f87171;
    --bad-bg: #3a1717;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, sans-serif;
  background: var(--bg);
  color: var(--ink);
}
a { color: inherit; }
.wrap { max-width: 860px; margin: 0 auto; padding: 0 16px; }

/* header */
header.top { background: var(--head); color: #fff; }
header.top .wrap { display: flex; align-items: center; gap: 12px; padding-top: 12px; padding-bottom: 12px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; font-size: 18px; }
.brand .logo { width: 34px; height: 34px; border-radius: 8px; background: var(--taxi); color: var(--taxi-ink); display: grid; place-items: center; font-size: 13px; letter-spacing: -.5px; }
.brand small { display: block; font-weight: 400; font-size: 12px; color: #cbd5e1; }
nav.main { margin-left: auto; display: flex; gap: 4px; }
nav.main a { text-decoration: none; padding: 8px 14px; border-radius: 999px; font-weight: 600; font-size: 15px; color: #e5e7eb; }
nav.main a.active, nav.main a:hover { background: var(--taxi); color: var(--taxi-ink); }
@media (max-width: 560px) {
  nav.main { margin-left: 0; width: 100%; }
  nav.main a { flex: 1; text-align: center; padding: 8px 6px; }
}

main { padding: 20px 0 60px; }
h1 { font-size: 26px; line-height: 1.2; margin: 8px 0 12px; }
h2 { font-size: 20px; margin: 28px 0 10px; }
h3 { font-size: 17px; margin: 0 0 6px; }
p { margin: 0 0 12px; }
.muted { color: var(--muted); }
.small { font-size: 14px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 12px; }
.grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.card.link { text-decoration: none; display: block; transition: transform .1s; }
.card.link:hover { transform: translateY(-2px); border-color: var(--taxi); }
.badge { display: inline-block; font-size: 12px; font-weight: 700; padding: 2px 8px; border-radius: 999px; background: var(--taxi); color: var(--taxi-ink); }
.badge.soon { background: var(--line); color: var(--muted); }

/* tabs & chips */
.tabs { display: flex; gap: 6px; margin: 4px 0 16px; overflow-x: auto; }
.tabs button, .chip {
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  padding: 8px 14px; border-radius: 10px; font: inherit; font-weight: 600; cursor: pointer; white-space: nowrap;
}
.tabs button.active, .chip.active { background: var(--head); color: #fff; border-color: var(--head); }
@media (prefers-color-scheme: dark) { .tabs button.active, .chip.active { background: var(--taxi); color: var(--taxi-ink); border-color: var(--taxi); } }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.chip { padding: 6px 12px; font-size: 14px; }

.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 14px; }
input[type=search] { flex: 1; min-width: 180px; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); color: var(--ink); font: inherit; }
label.switch { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; cursor: pointer; user-select: none; }

.btn { display: inline-block; border: 0; background: var(--taxi); color: var(--taxi-ink); font: inherit; font-weight: 700; padding: 11px 18px; border-radius: 10px; cursor: pointer; text-decoration: none; }
.btn.dark { background: var(--head); color: #fff; }
.btn.ghost { background: transparent; border: 1px solid var(--line); color: var(--ink); }
.btn:disabled { opacity: .5; cursor: default; }

/* questions */
.q { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 10px; }
.q .meta { font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.q .text { font-weight: 700; margin-bottom: 10px; }
.opts { display: grid; gap: 6px; }
.opt {
  text-align: left; width: 100%; border: 1px solid var(--line); background: transparent; color: var(--ink);
  padding: 10px 12px; border-radius: 10px; font: inherit; cursor: pointer; display: flex; gap: 10px; align-items: flex-start;
}
.opt .mark { flex: 0 0 22px; height: 22px; border-radius: 6px; border: 2px solid var(--line); display: grid; place-items: center; font-size: 13px; font-weight: 800; }
.opt:hover:not(:disabled) { border-color: var(--taxi); }
.opt.picked { border-color: var(--head); background: rgba(245,197,24,.15); }
.opt.picked .mark { background: var(--taxi); border-color: var(--taxi); color: var(--taxi-ink); }
.opt.right { border-color: var(--ok); background: var(--ok-bg); }
.opt.right .mark { background: var(--ok); border-color: var(--ok); color: #fff; }
.opt.wrong { border-color: var(--bad); background: var(--bad-bg); }
.opt.wrong .mark { background: var(--bad); border-color: var(--bad); color: #fff; }
.opt:disabled { cursor: default; }
.study .opt { cursor: default; }

/* exam */
.exambar { position: sticky; top: 0; z-index: 5; background: var(--bg); padding: 10px 0; display: flex; gap: 12px; align-items: center; border-bottom: 1px solid var(--line); margin-bottom: 14px; }
.timer { font-variant-numeric: tabular-nums; font-weight: 800; font-size: 20px; }
.timer.low { color: var(--bad); }
.progress { flex: 1; height: 8px; background: var(--line); border-radius: 99px; overflow: hidden; }
.progress > div { height: 100%; background: var(--taxi); width: 0; transition: width .2s; }
.dots { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0; }
.dots button { width: 34px; height: 34px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--ink); font: inherit; font-size: 13px; font-weight: 700; cursor: pointer; }
.dots button.done { background: var(--head); color: #fff; }
.dots button.cur { outline: 2px solid var(--taxi); outline-offset: 1px; }
.dots button.right { background: var(--ok); color: #fff; border-color: var(--ok); }
.dots button.wrong { background: var(--bad); color: #fff; border-color: var(--bad); }
.result { text-align: center; padding: 24px 16px; }
.result .big { font-size: 44px; font-weight: 900; line-height: 1; margin: 8px 0; }
.result.pass .big { color: var(--ok); }
.result.fail .big { color: var(--bad); }
.row { display: flex; gap: 10px; flex-wrap: wrap; justify-content: space-between; align-items: center; }
.scorebar { position: sticky; bottom: 0; background: var(--card); border-top: 1px solid var(--line); padding: 10px 16px; display: flex; gap: 12px; align-items: center; justify-content: space-between; margin: 0 -16px; }

footer { border-top: 1px solid var(--line); padding: 20px 0 30px; font-size: 13px; color: var(--muted); }
ol.steps { padding-left: 20px; }
ol.steps li { margin-bottom: 6px; }
.empty { text-align: center; padding: 30px 16px; color: var(--muted); }

/* Part 2: addresses, routes, maps */
.addr { display: flex; gap: 12px; align-items: flex-start; justify-content: space-between; }
.addr .name { font-weight: 700; }
.addr .where { color: var(--muted); }
.links { display: flex; gap: 6px; flex-wrap: wrap; }
.links a, .links button { font-size: 13px; padding: 6px 10px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--ink); text-decoration: none; cursor: pointer; font-family: inherit; font-weight: 600; white-space: nowrap; }
.links a:hover, .links button:hover { border-color: var(--taxi); }
.map { height: 320px; border-radius: 10px; border: 1px solid var(--line); margin-top: 10px; overflow: hidden; z-index: 0; }
.map.tall { height: 440px; }
.pin span { display: grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; color: #fff; font: 800 12px/1 system-ui, sans-serif; border: 2px solid #fff; box-shadow: 0 1px 4px rgba(0,0,0,.4); }
.steps-list { list-style: none; padding: 0; margin: 10px 0; display: grid; gap: 6px; }
.steps-list li { display: flex; gap: 10px; align-items: baseline; }
.steps-list .num { flex: 0 0 26px; height: 26px; border-radius: 50%; background: var(--head); color: #fff; display: grid; place-items: center; font-size: 12px; font-weight: 800; }
@media (prefers-color-scheme: dark) { .steps-list .num { background: var(--taxi); color: var(--taxi-ink); } }
.steps-list li.first .num { background: var(--ok); color: #fff; }
.steps-list li.last .num { background: var(--bad); color: #fff; }
.ends { display: grid; grid-template-columns: 1fr auto 1fr; gap: 8px; align-items: center; text-align: center; margin: 8px 0; }
.ends b { display: block; }
.ends small { color: var(--muted); }
.field { width: 100%; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); color: var(--ink); font: inherit; }
textarea.field { min-height: 160px; resize: vertical; }
.verdict { margin-top: 10px; padding: 10px 12px; border-radius: 10px; }
.verdict.ok { background: var(--ok-bg); color: var(--ok); }
.verdict.bad { background: var(--bad-bg); color: var(--bad); }
.flash { text-align: center; padding: 26px 16px; }
.flash .big { font-size: 22px; font-weight: 800; margin: 6px 0 14px; }
.note { font-size: 13px; color: var(--muted); }

/* Paid access */
.lock { text-align: center; padding: 26px 18px; }
.lock-icon { font-size: 34px; }
.lock .btn { margin-top: 4px; }
.card.locked h3 { color: var(--muted); margin: 0 0 4px; }
.price { margin: 6px 0 10px; font-size: 18px; }
.price s { color: var(--muted); font-size: 16px; margin-right: 6px; }
.plan { display: flex; gap: 16px; align-items: center; justify-content: space-between; flex-wrap: wrap; border-color: var(--taxi); }
.plan h3 { margin-top: 0; }
.plan .buy { text-align: center; min-width: 200px; }
.narrow { max-width: 560px; }
.device { padding: 10px 0; border-top: 1px solid var(--line); }
form .field { margin-bottom: 8px; }
[hidden] { display: none !important; }