:root {
  --bg: #f3f5fa;
  --surface: #ffffff;
  --surface-2: #eef1f8;
  --ink: #101828;
  --muted: #5b6477;
  --line: #dde2ee;
  --brand: #0e2a57;
  --brand-2: #173d7a;
  --gold: #f2b705;
  --gold-ink: #3b2a00;
  --ok: #138a4a;
  --ok-bg: #e5f6ec;
  --bad: #c62f2f;
  --bad-bg: #fdecec;
  --focus: #2f6fed;
  --radius: 16px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 8px 24px rgba(16, 24, 40, .06);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --surface: #121b2e;
    --surface-2: #18233a;
    --ink: #e8edf7;
    --muted: #9aa6bd;
    --line: #26324a;
    --brand: #0a1f42;
    --brand-2: #133066;
    --ok: #3ccf7f;
    --ok-bg: #0f2c1e;
    --bad: #ff6b6b;
    --bad-bg: #331618;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}
a { color: inherit; }
button { font: inherit; }

/* ---------- topo ---------- */
.top {
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff;
  padding: 18px 16px 64px;
}
.top-inner, .wrap { max-width: 760px; margin: 0 auto; }
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; letter-spacing: -.01em; text-decoration: none; color: #fff;
}
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px;
  background: var(--gold); color: var(--gold-ink);
  display: grid; place-items: center; font-weight: 900;
}
.brand small { display: block; font-weight: 500; opacity: .75; font-size: 12px; letter-spacing: .02em; }
.hero-title { margin: 22px 0 4px; font-size: clamp(22px, 5vw, 30px); line-height: 1.2; letter-spacing: -.02em; }
.hero-sub { margin: 0; opacity: .8; font-size: 15px; }
.pill {
  display: inline-block; margin-top: 12px; padding: 4px 10px; border-radius: 999px;
  background: rgba(255, 255, 255, .14); font-size: 13px; font-weight: 600;
}

.wrap { padding: 0 16px 48px; margin-top: -44px; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 22px;
}
@media (max-width: 520px) { .card { padding: 18px 16px; } }

/* ---------- progresso ---------- */
.progress-row { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.progress { flex: 1; height: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.progress > span { display: block; height: 100%; width: 0; background: var(--gold); border-radius: 999px; transition: width .35s ease; }
.counter { font-size: 14px; font-weight: 700; color: var(--muted); white-space: nowrap; }

.tag {
  display: inline-block; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em;
  color: var(--muted); margin-bottom: 8px;
}
.tag.review { color: var(--brand-2); }
@media (prefers-color-scheme: dark) { .tag.review { color: var(--gold); } }
.prompt { font-size: 18px; font-weight: 650; margin: 0 0 6px; letter-spacing: -.005em; }
.hint { font-size: 14px; color: var(--muted); margin: 0 0 16px; }

/* ---------- alternativas ---------- */
.options { display: grid; gap: 10px; margin: 14px 0 6px; }
.option {
  display: flex; gap: 12px; align-items: flex-start; width: 100%; text-align: left;
  padding: 14px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--surface);
  color: var(--ink); cursor: pointer; transition: border-color .15s, background .15s, transform .05s;
}
.option:hover { border-color: #aab6d3; }
.option:active { transform: scale(.995); }
.option:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.option .letter {
  flex: none; width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center;
  background: var(--surface-2); font-weight: 800; font-size: 14px;
}
.option[aria-checked="true"] { border-color: var(--brand-2); background: color-mix(in srgb, var(--brand-2) 8%, var(--surface)); }
.option[aria-checked="true"] .letter { background: var(--brand-2); color: #fff; }
@media (prefers-color-scheme: dark) {
  .option[aria-checked="true"] { border-color: var(--gold); background: color-mix(in srgb, var(--gold) 10%, var(--surface)); }
  .option[aria-checked="true"] .letter { background: var(--gold); color: var(--gold-ink); }
}

/* ---------- navegação ---------- */
.nav { display: flex; gap: 10px; justify-content: space-between; margin-top: 20px; }
.btn {
  appearance: none; border: 0; border-radius: 12px; padding: 13px 18px; font-weight: 700; cursor: pointer;
  min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; text-decoration: none;
}
.btn:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.btn-primary { background: var(--gold); color: var(--gold-ink); flex: 1; }
.btn-primary:hover { filter: brightness(1.04); }
.btn-ghost { background: var(--surface-2); color: var(--ink); }
.btn[disabled] { opacity: .45; cursor: not-allowed; }

.dots { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line); }
.dot {
  width: 34px; height: 34px; border-radius: 9px; border: 1.5px solid var(--line); background: var(--surface);
  font-size: 13px; font-weight: 700; color: var(--muted); cursor: pointer;
}
.dot.done { background: var(--surface-2); color: var(--ink); }
.dot.current { border-color: var(--brand-2); color: var(--ink); }
@media (prefers-color-scheme: dark) { .dot.current { border-color: var(--gold); } }

/* ---------- resultado ---------- */
.result { text-align: center; }
.ring { width: 168px; height: 168px; margin: 4px auto 10px; position: relative; }
.ring svg { transform: rotate(-90deg); }
.ring .track { stroke: var(--surface-2); }
.ring .value { transition: stroke-dashoffset 1s ease; stroke-linecap: round; }
.ring .label { position: absolute; inset: 0; display: grid; place-content: center; }
.ring .big { font-size: 38px; font-weight: 850; letter-spacing: -.03em; line-height: 1; }
.ring .small { color: var(--muted); font-size: 14px; margin-top: 4px; }
.verdict { font-size: 22px; font-weight: 800; margin: 6px 0 4px; letter-spacing: -.01em; }
.verdict-sub { color: var(--muted); margin: 0 auto 18px; max-width: 460px; }

.goal { text-align: left; background: var(--surface-2); border-radius: 12px; padding: 14px; margin: 16px 0; }
.goal-head { display: flex; justify-content: space-between; gap: 10px; font-size: 14px; font-weight: 600; }
.goal-bar { position: relative; height: 10px; background: var(--line); border-radius: 999px; margin: 12px 0 6px; }
.goal-bar .fill { position: absolute; inset: 0 auto 0 0; border-radius: 999px; transition: width 1s ease; }
.goal-bar .mark { position: absolute; top: -5px; width: 3px; height: 20px; background: var(--ink); border-radius: 2px; }
.goal-note { font-size: 13px; color: var(--muted); }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 16px 0; }
.stat { background: var(--surface-2); border-radius: 12px; padding: 12px 8px; }
.stat b { display: block; font-size: 20px; letter-spacing: -.02em; }
.stat span { font-size: 12px; color: var(--muted); }

.grid-title { text-align: left; font-size: 14px; font-weight: 700; margin: 18px 0 8px; }
.qgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(40px, 1fr)); gap: 6px; }
.qchip { height: 40px; border-radius: 10px; display: grid; place-items: center; font-weight: 800; font-size: 14px; }
.qchip.ok { background: var(--ok-bg); color: var(--ok); }
.qchip.bad { background: var(--bad-bg); color: var(--bad); }
.legend { display: flex; gap: 14px; justify-content: center; font-size: 13px; color: var(--muted); margin-top: 10px; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.actions .btn { flex: 1 1 180px; }

/* ---------- lista de cursos ---------- */
.course + .course { margin-top: 16px; }
.course h2 { margin: 0 0 2px; font-size: 19px; letter-spacing: -.01em; }
.course .meta { color: var(--muted); font-size: 14px; margin: 0 0 12px; }
.quiz-link {
  display: flex; justify-content: space-between; gap: 12px; align-items: center; padding: 12px 0;
  border-top: 1px solid var(--line); text-decoration: none;
}
.quiz-link:hover .ql-title { text-decoration: underline; }
.ql-title { font-weight: 600; }
.ql-sub { font-size: 13px; color: var(--muted); }
.ql-go { flex: none; font-weight: 800; color: var(--brand-2); }
@media (prefers-color-scheme: dark) { .ql-go { color: var(--gold); } }

.empty, .loading { text-align: center; color: var(--muted); padding: 28px 0; }
.foot { text-align: center; color: var(--muted); font-size: 13px; margin-top: 22px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }
.pill-link { margin-left: 8px; text-decoration: none; cursor: pointer; }
.pill-link:hover { filter: brightness(1.1); }

/* ---------- topo com atalho ---------- */
.top-bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.top-link {
  color: #fff; text-decoration: none; font-size: 14px; font-weight: 700; padding: 8px 12px; border-radius: 10px;
  background: rgba(255, 255, 255, .12); white-space: nowrap;
}
.top-link:hover { background: rgba(255, 255, 255, .2); }
.search { display: block; margin-top: 16px; }
.search input {
  width: 100%; padding: 12px 14px; border-radius: 12px; border: 0; font: inherit; font-size: 16px;
  background: rgba(255, 255, 255, .95); color: #101828;
}
.search input:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; }

/* ---------- disciplinas (lista recolhível) ---------- */
.discipline { border-top: 1px solid var(--line); }
.discipline[hidden] { display: none; }
.discipline > summary {
  list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 14px 2px; font-weight: 700;
}
.discipline > summary::-webkit-details-marker { display: none; }
.discipline > summary::after { content: "▾"; color: var(--muted); transition: transform .2s; flex: none; }
.discipline[open] > summary::after { transform: rotate(180deg); }
.discipline > summary:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 8px; }
.d-name { flex: 1; min-width: 0; }
.d-count { font-size: 13px; font-weight: 600; color: var(--muted); text-align: right; }
.d-handout { color: var(--brand-2); font-weight: 700; }
@media (prefers-color-scheme: dark) { .d-handout { color: var(--gold); } }
.d-body { padding: 0 0 10px; }
.d-body .quiz-link:first-of-type { border-top: 0; }
@media (max-width: 520px) {
  .discipline > summary { flex-wrap: wrap; }
  .d-count { text-align: left; flex-basis: 100%; order: 2; }
}

/* ---------- apostila ---------- */
.handout {
  text-align: left; border: 1.5px solid color-mix(in srgb, var(--gold) 60%, var(--line)); border-radius: 14px;
  padding: 18px; margin: 12px 0 16px; background: color-mix(in srgb, var(--gold) 7%, var(--surface));
}
.handout-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.handout-badge { font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.handout-price { font-size: 22px; font-weight: 850; letter-spacing: -.02em; }
.handout-title { margin: 6px 0 2px; font-size: 18px; letter-spacing: -.01em; }
.handout-meta { margin: 0 0 10px; color: var(--muted); font-size: 14px; }
.handout-points { margin: 0 0 14px; padding-left: 20px; font-size: 14px; }
.handout-points li + li { margin-top: 4px; }
.handout.compact .handout-points { display: none; }
.handout-form { display: flex; gap: 10px; flex-wrap: wrap; }
.handout-form input, .login input {
  flex: 1 1 220px; min-height: 48px; padding: 0 14px; border-radius: 12px; border: 1.5px solid var(--line);
  background: var(--surface); color: var(--ink); font: inherit; font-size: 16px;
}
.handout-form input:focus-visible, .login input:focus-visible { outline: 3px solid var(--focus); outline-offset: 1px; }
.handout-form .btn { flex: 1 1 200px; }
.handout-note { font-size: 13px; color: var(--muted); margin: 10px 0 0; }
.handout-note a { font-weight: 700; }

/* ---------- minhas apostilas ---------- */
.login { display: grid; gap: 10px; max-width: 420px; margin: 0 auto; }
.login label { font-weight: 700; font-size: 14px; }
.purchase {
  display: flex; justify-content: space-between; align-items: center; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--line);
}
.purchase .btn { flex: none; }
@media (max-width: 520px) {
  .purchase { flex-direction: column; align-items: stretch; }
  .nav { flex-wrap: wrap; }
  .stats { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .prompt { font-size: 17px; }
  .top { padding-bottom: 56px; }
}

/* ---------- termos e rodapé ---------- */
.legal h2 { font-size: 19px; margin: 26px 0 8px; letter-spacing: -.01em; }
.legal nav { font-size: 14px; color: var(--muted); }
.legal li + li { margin-top: 6px; }
.legal a { color: var(--brand-2); font-weight: 600; }
@media (prefers-color-scheme: dark) { .legal a { color: var(--gold); } }
.site-foot { text-align: center; font-size: 13px; color: var(--muted); padding: 0 16px 32px; }
.site-foot a { color: inherit; }

/* ---------- vitrine e aulas com vídeo ---------- */
.shelf { margin-bottom: 16px; }
.shelf h2 { margin: 0 0 2px; font-size: 19px; }
.shelf-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px; }
.shelf-item {
  display: grid; gap: 4px; text-align: left; padding: 14px; border-radius: 12px; cursor: pointer;
  border: 1.5px solid color-mix(in srgb, var(--gold) 55%, var(--line)); background: color-mix(in srgb, var(--gold) 6%, var(--surface)); color: var(--ink);
}
.shelf-item:hover, .shelf-item.active { border-color: var(--gold); }
.shelf-item:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.shelf-course { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.shelf-price { font-weight: 850; font-size: 18px; margin-top: 4px; }
.lesson-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 0; border-top: 1px solid var(--line); }
.d-body .lesson-row:first-of-type { border-top: 0; }
.lesson-info { display: grid; gap: 2px; min-width: 0; }
.lesson-actions { display: flex; gap: 8px; flex: none; }
.chip {
  display: inline-flex; align-items: center; min-height: 38px; padding: 0 12px; border-radius: 10px;
  font-size: 14px; font-weight: 700; text-decoration: none; white-space: nowrap;
}
.chip:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.chip-video { background: #c4302b; color: #fff; }
.chip-quiz { background: var(--surface-2); color: var(--ink); }
.chip:hover { filter: brightness(1.08); }
@media (max-width: 520px) {
  .lesson-row { flex-direction: column; align-items: stretch; }
  .lesson-actions .chip { flex: 1; justify-content: center; }
}