:root {
  --bg: #f6f3ee; --card: #ffffff; --ink: #1f1b16; --muted: #6b6259; --line: #e4ddd3;
  --brand: #b4461f; --brand-ink: #ffffff; --ok: #1f7a4d; --warn: #a15c00; --bad: #b3261e;
  --radius: 14px; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #16130f; --card: #221e19; --ink: #f2ece4; --muted: #a89e92; --line: #3a332b; --brand: #e0784e; --brand-ink: #1a0f0a; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.45; }
main { max-width: 560px; margin: 0 auto; padding: 20px 16px 48px; }
main.ancho { max-width: 1100px; }
h1 { font-size: 1.5rem; margin: 0 0 4px; }
h2 { font-size: 1.1rem; margin: 0 0 12px; }
p.sub { color: var(--muted); margin: 0 0 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin-bottom: 16px; }
label { display: block; font-size: .9rem; font-weight: 600; margin: 12px 0 4px; }
input, select, textarea { width: 100%; padding: 11px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); font: inherit; }
textarea { min-height: 80px; }
label.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; }
label.check input { width: auto; margin-top: 4px; }
button, .btn { display: inline-block; text-align: center; border: 0; border-radius: 10px; padding: 11px 16px; font: inherit; font-weight: 600; cursor: pointer; background: var(--brand); color: var(--brand-ink); text-decoration: none; }
.btn.sec, button.sec { background: transparent; color: var(--ink); border: 1px solid var(--line); }
button.peq { padding: 6px 10px; font-size: .85rem; }
button:disabled { opacity: .5; cursor: default; }
.full { width: 100%; margin-top: 16px; }
.fila { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.fila > * { flex: 1; }
.msg { padding: 10px 12px; border-radius: 10px; margin-top: 12px; font-size: .95rem; }
.msg.ok { background: color-mix(in srgb, var(--ok) 15%, transparent); color: var(--ok); }
.msg.error { background: color-mix(in srgb, var(--bad) 15%, transparent); color: var(--bad); }
.oculto { display: none !important; }
.puntos { font-size: 3rem; font-weight: 800; line-height: 1; }
.nivel { display: inline-block; text-transform: capitalize; padding: 2px 10px; border-radius: 99px; background: var(--bg); border: 1px solid var(--line); font-size: .85rem; }
.qr { background: #fff; padding: 12px; border-radius: 12px; max-width: 240px; margin: 12px auto; }
.qr svg { width: 100%; height: auto; display: block; }
.centro { text-align: center; }
.muted { color: var(--muted); font-size: .9rem; }
ul.lista { list-style: none; padding: 0; margin: 0; }
ul.lista li { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); align-items: center; }
ul.lista li:last-child { border-bottom: 0; }
.mas { color: var(--ok); font-weight: 700; } .menos { color: var(--bad); font-weight: 700; }
.codigo { font-family: ui-monospace, monospace; font-size: 1.6rem; letter-spacing: .15em; font-weight: 800; }
.estrellas { display: flex; gap: 6px; justify-content: center; margin: 8px 0; }
.estrellas button { font-size: 1.8rem; background: none; color: var(--muted); padding: 4px; }
.estrellas button.on { color: #e0a100; }
nav.tabs { display: flex; gap: 6px; overflow-x: auto; margin-bottom: 16px; padding-bottom: 4px; scrollbar-width: thin; scrollbar-color: var(--line) transparent; }
nav.tabs button { background: var(--card); color: var(--ink); border: 1px solid var(--line); white-space: nowrap; }
nav.tabs button.activo { background: var(--brand); color: var(--brand-ink); border-color: var(--brand); }
.kpis { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; margin-bottom: 16px; }
.kpi { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; }
.kpi .v { font-size: 1.6rem; font-weight: 800; }
.kpi .l { color: var(--muted); font-size: .85rem; }
.tabla { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
.barras { display: flex; align-items: flex-end; gap: 3px; height: 120px; }
.barras div { flex: 1; background: var(--brand); border-radius: 3px 3px 0 0; min-height: 2px; }
#lector { width: 100%; border-radius: 12px; overflow: hidden; background: #000; }
#lector video { width: 100%; display: block; }
header.barra { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; gap: 10px; }
.barras div { max-width: 32px; }
header.barra .fila { flex: none; flex-wrap: nowrap; }
header.barra .fila > * { flex: none; }

/* Enlace para volver al menú principal desde cualquier pantalla */
a.volver { display: inline-block; color: var(--brand); margin-bottom: 12px; padding: 6px 0; font-weight: 600; text-decoration: none; }
a.volver:hover { text-decoration: underline; }