/* --brand and --accent are replaced per flavor by build.mjs. */
:root {
  --brand: #3949AB;
  --accent: #FFB300;
  --bg: #f7f8fc;
  --surface: #ffffff;
  --text: #1b1d29;
  --muted: #5d6175;
  --line: #e3e5ee;
  --ok: #1e8e4e;
  --ok-bg: #e6f5ec;
  --bad: #c62d3a;
  --bad-bg: #fbe9eb;
  --radius: 12px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12131a;
    --surface: #1c1e28;
    --text: #e9eaf2;
    --muted: #a3a7bb;
    --line: #2d303e;
    --ok: #5fd08f;
    --ok-bg: #173323;
    --bad: #ff7d88;
    --bad-bg: #3a1c21;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif;
}
a { color: var(--brand); }
@media (prefers-color-scheme: dark) { a { color: color-mix(in srgb, var(--brand) 55%, white); } }
img { max-width: 100%; height: auto; }
.wrap { max-width: 920px; margin: 0 auto; padding: 0 16px; }
h1 { font-size: clamp(1.6rem, 4vw, 2.2rem); line-height: 1.25; margin: .6em 0 .3em; }
h2 { font-size: 1.3rem; margin: 1.8em 0 .6em; }
h3 { font-size: 1.05rem; }
.lead { color: var(--muted); font-size: 1.05rem; margin-top: 0; }

/* Header */
.top { background: var(--brand); color: #fff; position: sticky; top: 0; z-index: 10; }
.top .wrap { display: flex; align-items: center; gap: 16px; min-height: 56px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 700; }
.brand img { border-radius: 8px; }
.menu { display: flex; gap: 4px; margin-left: auto; overflow-x: auto; }
.menu a { color: #fff; text-decoration: none; padding: 6px 10px; border-radius: 8px; white-space: nowrap; font-size: .95rem; }
.menu a:hover { background: rgb(255 255 255 / .15); }
@media (max-width: 640px) {
  .top .wrap { padding-top: 8px; padding-bottom: 6px; gap: 4px; }
  .menu { margin-left: -10px; width: calc(100% + 10px); }
}

/* Buttons */
.btn {
  display: inline-block; background: var(--brand); color: #fff !important; text-decoration: none;
  padding: 9px 16px; border-radius: 10px; border: 1px solid var(--brand); font: inherit; font-weight: 600; cursor: pointer;
}
.btn.ghost { background: transparent; color: var(--brand) !important; }
@media (prefers-color-scheme: dark) { .btn.ghost { color: var(--text) !important; } }
.btn.big { padding: 12px 20px; font-size: 1.05rem; }
.link { background: none; border: 0; color: var(--brand); font: inherit; cursor: pointer; text-decoration: underline; padding: 0; }

/* Home */
.hero { padding: 28px 0 8px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }
.cards { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card {
  display: block; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; text-decoration: none; color: var(--text); border-top: 4px solid var(--brand);
}
.card:hover { box-shadow: 0 6px 20px rgb(0 0 0 / .08); }
.card h3 { margin: 0 0 6px; color: var(--brand); }
.card p { margin: 0 0 12px; color: var(--muted); font-size: .95rem; }
.pill { display: inline-block; background: color-mix(in srgb, var(--accent) 22%, transparent); padding: 2px 10px; border-radius: 99px; font-size: .85rem; font-weight: 600; }

.chips { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.chips a {
  display: inline-block; background: var(--surface); border: 1px solid var(--line); border-radius: 99px;
  padding: 5px 12px; text-decoration: none; color: var(--text); font-size: .93rem;
}
.chips a:hover { border-color: var(--brand); }
.chips small { color: var(--muted); margin-left: 4px; }

.sets { list-style: none; padding: 0; display: grid; gap: 10px; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
.sets a {
  display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px; text-decoration: none; color: var(--text);
}
.sets a:hover { border-color: var(--brand); }
.sets small { color: var(--muted); }

.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px; margin-bottom: 8px; }
.faq summary { font-weight: 600; cursor: pointer; }

.crumbs { font-size: .88rem; color: var(--muted); margin-top: 18px; display: flex; flex-wrap: wrap; gap: 6px; }
.crumbs a { color: var(--muted); }
.crumbs .sep { opacity: .5; }
.topics-line { font-size: .93rem; color: var(--muted); }

/* Questions */
.score {
  position: sticky; top: 56px; z-index: 5; display: flex; justify-content: space-between; align-items: center;
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 8px 14px; margin: 16px 0;
}
@media (max-width: 640px) { .score { top: 84px; } }
.qs { display: grid; gap: 14px; }
.q { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; scroll-margin-top: 130px; }
.q-text { margin: 0 0 12px; font-weight: 600; font-size: 1.02rem; line-height: 1.5; }
.q-num { color: var(--brand); margin-right: 4px; }
.opts { list-style: none; padding: 0; margin: 0 0 10px; display: grid; gap: 8px; }
.opt {
  width: 100%; text-align: left; display: flex; gap: 10px; align-items: flex-start; background: transparent; color: var(--text);
  border: 1px solid var(--line); border-radius: 10px; padding: 9px 12px; font: inherit; cursor: pointer;
}
.opt:hover:not(:disabled) { border-color: var(--brand); }
.opt:disabled { cursor: default; }
.opt-l {
  flex: none; width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center;
  background: var(--bg); font-weight: 700; font-size: .82rem;
}
.opt.correct { border-color: var(--ok); background: var(--ok-bg); }
.opt.correct .opt-l { background: var(--ok); color: #fff; }
.opt.wrong { border-color: var(--bad); background: var(--bad-bg); }
.opt.wrong .opt-l { background: var(--bad); color: #fff; }
.ans summary { cursor: pointer; color: var(--brand); font-weight: 600; font-size: .93rem; }
.ans p { margin: .5em 0; }
.q-meta { margin: 8px 0 0; font-size: .82rem; color: var(--muted); text-transform: capitalize; }

.pager { display: flex; justify-content: space-between; gap: 12px; margin: 24px 0; flex-wrap: wrap; }

/* Mock test */
.mock-setup { display: flex; flex-wrap: wrap; gap: 14px; align-items: end; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.mock-setup label { display: grid; gap: 4px; font-weight: 600; font-size: .93rem; }
.mock-setup select { font: inherit; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--line); background: var(--bg); color: var(--text); }
.mock-result { background: var(--surface); border: 2px solid var(--brand); border-radius: var(--radius); padding: 18px; margin: 16px 0; }
.mock-result .big { font-size: 2rem; font-weight: 800; color: var(--brand); }
.opt.picked { border-color: var(--brand); background: color-mix(in srgb, var(--brand) 12%, transparent); }

.app-cta {
  display: flex; gap: 14px; align-items: center; flex-wrap: wrap; margin: 32px 0; padding: 16px 18px;
  background: color-mix(in srgb, var(--accent) 14%, var(--surface)); border: 1px solid var(--line); border-radius: var(--radius);
}
.app-cta img { border-radius: 12px; }
.app-cta > div:nth-child(2) { flex: 1 1 220px; }
.app-cta p { margin: 2px 0 0; color: var(--muted); font-size: .93rem; }
.app-links { display: flex; gap: 8px; }
.ad { margin: 20px 0; min-height: 90px; }

.foot { border-top: 1px solid var(--line); margin-top: 48px; padding: 20px 0 32px; font-size: .88rem; color: var(--muted); }
.foot a { color: var(--muted); }
.disclaimer { max-width: 70ch; }