:root {
  --bg: #f5f7fb; --fg: #111827; --muted: #6b7280; --card: #ffffff; --line: #e5e7eb;
  --primary: #2563eb; --primary-fg: #ffffff; --danger: #dc2626; --ok: #16a34a; --bar: #93c5fd;
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f172a; --fg: #e5e7eb; --muted: #94a3b8; --card: #1e293b; --line: #334155; --bar: #1d4ed8; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--fg); }
a { color: var(--primary); }
.wrap { max-width: 980px; margin: 0 auto; padding: 16px; }
.narrow { max-width: 420px; margin: 24px auto; }
.nav { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; padding: 10px 16px; background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.nav a { text-decoration: none; font-weight: 600; }
.nav .brand { font-size: 1.15rem; }
.spacer { flex: 1; }
h2 { margin: 8px 0 12px; }
h3 { margin: 4px 0 8px; }
.muted { color: var(--muted); }
.tagline { text-align: center; color: var(--muted); }
.error { color: var(--danger); font-weight: 600; margin: 4px 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; margin: 10px 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.grid .card { margin: 0; }
.form { display: flex; flex-direction: column; gap: 10px; }
input, textarea, select { font: inherit; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--line); background: var(--bg); color: var(--fg); width: 100%; }
input[type=radio], input[type=checkbox] { width: auto; }
.row { display: flex; gap: 8px; align-items: center; }
.row.wrap { flex-wrap: wrap; }
.row > input { flex: 1; }
.btn { display: inline-block; font: inherit; font-weight: 600; padding: 10px 16px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--fg); cursor: pointer; text-decoration: none; }
.btn.primary { background: var(--primary); color: var(--primary-fg); border-color: var(--primary); }
.btn.danger { color: var(--danger); border-color: var(--danger); }
.btn.ghost { background: transparent; }
.btn.small { padding: 6px 10px; font-size: .9rem; }
.table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: var(--radius); overflow: hidden; }
.table th, .table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.right { text-align: right; white-space: nowrap; }
.right .btn { margin-left: 6px; }
.scroll { overflow-x: auto; }
.qtext { font-weight: 600; margin: 4px 0; }
.qtext.big { font-size: 1.3rem; }
.qchoices { margin: 6px 0; padding-left: 22px; }
.qchoices li.ok { color: var(--ok); font-weight: 600; }
.choice .radio { white-space: nowrap; font-weight: 600; }
.qpick { display: flex; flex-direction: column; gap: 6px; max-height: 260px; overflow: auto; border: 1px solid var(--line); border-radius: 8px; padding: 8px; }
.qpick label { display: flex; gap: 8px; align-items: center; }
.badge { display: inline-block; min-width: 22px; text-align: center; background: var(--primary); color: #fff; border-radius: 999px; font-size: .8rem; }
.badge:empty { display: none; }

/* barras de resultados */
.bars { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; }
.barrow { display: grid; grid-template-columns: 34px 1fr 40px; align-items: center; gap: 8px; }
.barrow .letter { font-weight: 800; font-size: 1.2rem; text-align: center; }
.barwrap { position: relative; background: var(--line); border-radius: 8px; height: 38px; overflow: hidden; }
.barwrap .fill { position: absolute; inset: 0 auto 0 0; background: var(--bar); transition: width .4s; }
.barwrap .ctext { position: absolute; inset: 0; display: flex; align-items: center; padding: 0 10px; font-weight: 600; }
.barrow .count { font-weight: 700; text-align: right; }
.barrow.correct .fill { background: var(--ok); }
.barrow.correct .ctext { color: #fff; }
.barrow.dim { opacity: .45; }
.bars.big .barwrap { height: 64px; }
.bars.big .letter, .bars.big .count { font-size: 2rem; }
.bars.big .ctext { font-size: 1.6rem; }
.bars.big .barrow { grid-template-columns: 56px 1fr 64px; }

/* cámara */
.camera { position: relative; max-width: 640px; margin-top: 8px; }
.camera video { width: 100%; display: none; border-radius: 8px; background: #000; }
.camera video.on { display: block; }
.camera .overlay { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0; }
.chip { padding: 4px 10px; border-radius: 999px; background: var(--line); font-size: .85rem; }
.chip.done { background: #bbf7d0; color: #14532d; }
.dot { display: inline-block; min-width: 24px; text-align: center; border-radius: 6px; margin-right: 3px; font-weight: 700; padding: 0 4px; }
.dot.ok { background: #bbf7d0; color: #14532d; }
.dot.bad { background: #fecaca; color: #7f1d1d; }
.dot.none { color: var(--muted); }

/* proyección */
body.presenting .nav { display: none; }
.present { padding: 8px 4vw; }
.qtext.xl { font-size: clamp(1.6rem, 4vw, 3rem); line-height: 1.2; }

/* tarjetas imprimibles */
.pgrid { display: grid; grid-template-columns: repeat(auto-fill, 8.6cm); gap: 0; justify-content: center; }
.pcard { position: relative; width: 8.6cm; height: 8.6cm; border: 1px dashed #888; background: #fff; color: #000; break-inside: avoid; page-break-inside: avoid; }
.pcard .pmk { position: absolute; left: 1.5cm; top: 1.5cm; width: 5.6cm; height: 5.6cm; }
.pcard .pmk svg { width: 100%; height: 100%; display: block; }
.pl { position: absolute; font: 800 1.1cm/1 system-ui, sans-serif; width: 1.5cm; height: 1.5cm; display: flex; align-items: center; justify-content: center; }
.pl.top { top: 0; left: 3.55cm; }
.pl.bottom { bottom: 0; left: 3.55cm; transform: rotate(180deg); }
.pl.right { right: 0; top: 3.55cm; transform: rotate(90deg); }
.pl.left { left: 0; top: 3.55cm; transform: rotate(-90deg); }
.pno { position: absolute; left: .25cm; top: .2cm; font: 700 .55cm/1 system-ui, sans-serif; }
.pnm { position: absolute; right: .25cm; bottom: .2cm; font: .38cm/1 system-ui, sans-serif; max-width: 3cm; text-align: right; overflow: hidden; white-space: nowrap; }
@media print {
  body { background: #fff; }
  .noprint, .nav { display: none !important; }
  .wrap { max-width: none; padding: 0; }
  .pgrid { grid-template-columns: repeat(2, 8.6cm); }
  @page { size: A4; margin: 1.2cm; }
}
@media (max-width: 520px) {
  .wrap { padding: 12px; }
  .barrow { grid-template-columns: 28px 1fr 32px; }
}