:root {
  --bg: #0f172a;
  --card: #1e293b;
  --card-2: #273449;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --ok: #22c55e;
  --ok-bg: #14361f;
  --bad: #ef4444;
  --bad-bg: #3a1717;
  --border: #334155;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}
.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 16px 80px;
}
h1 { font-size: 1.5rem; margin: 0 0 4px; }
.sub { color: var(--muted); font-size: .9rem; margin-bottom: 24px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
}

/* Start screen */
.sets { display: flex; flex-direction: column; gap: 12px; margin: 18px 0; }
.set-opt {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px;
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
}
.set-opt:hover { border-color: var(--accent); }
.set-opt input { width: 18px; height: 18px; accent-color: var(--accent); }
.set-opt .meta { color: var(--muted); font-size: .85rem; }

button.primary {
  width: 100%;
  padding: 14px;
  font-size: 1rem;
  font-weight: 600;
  color: #04293a;
  background: var(--accent);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  margin-top: 8px;
}
button.primary:hover { filter: brightness(1.08); }
button.primary:disabled { opacity: .5; cursor: not-allowed; }

/* Quiz header */
.qhead {
  display: flex; flex-wrap: wrap; gap: 8px 16px;
  align-items: center; justify-content: space-between;
  margin-bottom: 16px;
  font-size: .85rem; color: var(--muted);
}
.badge {
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  color: var(--text);
}
.badge.fails { color: #fca5a5; }
.progress {
  height: 6px; background: var(--card-2); border-radius: 999px;
  overflow: hidden; margin-bottom: 18px;
}
.progress > div { height: 100%; background: var(--accent); width: 0; transition: width .2s; }

.enunciado { font-size: 1.12rem; font-weight: 600; margin-bottom: 18px; }

.options { display: flex; flex-direction: column; gap: 10px; }
.opt {
  display: flex; gap: 12px; align-items: flex-start;
  text-align: left;
  width: 100%;
  padding: 14px 16px;
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: .98rem;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.opt:hover:not(:disabled) { border-color: var(--accent); }
.opt:disabled { cursor: default; }
.opt .letra {
  flex: none;
  width: 26px; height: 26px;
  display: grid; place-items: center;
  border-radius: 6px;
  background: var(--bg);
  font-weight: 700; font-size: .85rem;
  text-transform: uppercase;
}
.opt.correct { background: var(--ok-bg); border-color: var(--ok); }
.opt.correct .letra { background: var(--ok); color: #04210f; }
.opt.wrong { background: var(--bad-bg); border-color: var(--bad); }
.opt.wrong .letra { background: var(--bad); color: #2a0a0a; }

.footer-bar {
  margin-top: 18px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.verdict { font-weight: 600; }
.verdict.ok { color: var(--ok); }
.verdict.bad { color: var(--bad); }
button.next {
  padding: 12px 24px;
  font-weight: 600;
  color: #04293a;
  background: var(--accent);
  border: none; border-radius: 10px; cursor: pointer;
}
button.next:hover { filter: brightness(1.08); }

.status-note {
  margin-top: 14px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: .92rem;
}
.status-note strong { display: block; }
.status-note div { color: var(--muted); margin-top: 4px; }
.status-note.anulada {
  background: var(--bad-bg);
  border-color: var(--bad);
  color: #fca5a5;
}
.status-note.impugnable {
  background: #3a2e12;
  border-color: #d9a521;
  color: #fcd34d;
}

.round-banner {
  text-align: center;
  padding: 32px 20px;
}
.round-banner h2 { margin: 0 0 8px; }
.round-banner p { color: var(--muted); margin: 0 0 22px; }

.link {
  background: none; border: none; color: var(--muted);
  text-decoration: underline; cursor: pointer; font-size: .85rem;
}
.topbar { display: flex; justify-content: flex-end; margin-bottom: 8px; }
.error { color: #fca5a5; }