* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, system-ui, Segoe UI, Roboto, sans-serif;
  background: #f5f6f5;
  color: #1a1a1a;
}
header {
  background: #0b6e4f;
  color: #fff;
  padding: 14px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
header h1 { font-size: 18px; margin: 0; }
header button { background: transparent; border: 1px solid #fff; color: #fff; padding: 6px 10px; border-radius: 6px; }
main { max-width: 640px; margin: 0 auto; padding: 16px; }
.card { background: #fff; border-radius: 10px; padding: 16px; margin-bottom: 16px; box-shadow: 0 1px 3px rgba(0,0,0,.1); }
label { display: block; margin: 10px 0 4px; font-size: 14px; font-weight: 600; }
input, select, textarea { width: 100%; padding: 10px; border: 1px solid #ccc; border-radius: 6px; font-size: 15px; }
button.primario { background: #0b6e4f; color: #fff; border: none; padding: 12px; border-radius: 8px; font-size: 15px; width: 100%; margin-top: 14px; }
button.secundario { background: #eee; color: #333; border: 1px solid #ccc; padding: 10px; border-radius: 8px; font-size: 14px; width: 100%; margin-top: 8px; }
.tabs { display: flex; margin-bottom: 12px; }
.tabs button { flex: 1; padding: 10px; border: none; background: #eee; cursor: pointer; }
.tabs button.activo { background: #0b6e4f; color: #fff; }
.item-fila { display: grid; grid-template-columns: 2fr 1fr 1fr auto; gap: 6px; margin-bottom: 8px; align-items: center; }
.item-fila button { background: #c0392b; color: #fff; border: none; border-radius: 6px; padding: 8px; }
.total { font-size: 18px; font-weight: 700; text-align: right; margin-top: 10px; }
.aviso { padding: 10px; border-radius: 8px; margin-bottom: 12px; font-size: 14px; }
.aviso.offline { background: #fff3cd; color: #664d03; }
.aviso.error { background: #f8d7da; color: #842029; }
.aviso.ok { background: #d1e7dd; color: #0f5132; }
.lista-item { display: flex; justify-content: space-between; border-bottom: 1px solid #eee; padding: 10px 0; }
.pendiente-tag { background: #fff3cd; color: #664d03; font-size: 11px; padding: 2px 8px; border-radius: 10px; }
a.enlace { color: #0b6e4f; }
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.5); display: flex; align-items: center; justify-content: center; padding: 16px; }
.modal-caja { background: #fff; border-radius: 12px; padding: 20px; max-width: 360px; width: 100%; text-align: center; }
.qr-img { max-width: 220px; width: 100%; margin: 12px auto; display: block; border: 1px solid #eee; border-radius: 8px; }
.usage-bar { font-size: 13px; color: #555; margin-bottom: 10px; }