:root {
  --navy: #142a3f;
  --navy-2: #204264;
  --cream: #f8f3e9;
  --copper: #bf5e1f;
  --ink: #1c1c1c;
  --muted: #6b6b6b;
  --linea: #e2ddd0;
  --exito: #1e7a3d;
  --error: #b3261e;
  --aviso: #b8860b;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--cream); color: var(--ink);
  font-family: -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
}
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px; background: linear-gradient(155deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #fff; flex-shrink: 0; padding: 24px 16px;
}
.sidebar .marca { font-family: Georgia, serif; font-size: 1.15rem; margin-bottom: 4px; }
.sidebar .submarca { font-size: 0.72rem; color: rgba(255,255,255,0.6); margin-bottom: 28px; text-transform: uppercase; letter-spacing: 0.06em; }
.sidebar nav a {
  display: block; padding: 10px 12px; border-radius: 8px; color: rgba(255,255,255,0.85);
  text-decoration: none; font-size: 0.92rem; margin-bottom: 4px;
}
.sidebar nav a:hover, .sidebar nav a.activo { background: rgba(255,255,255,0.12); color: #fff; }
.sidebar .cerrar-sesion { margin-top: 30px; }
main.contenido { flex: 1; padding: 28px 36px; max-width: 1200px; }
h1 { font-size: 1.5rem; margin: 0 0 20px; color: var(--navy); }
.card { background: #fff; border: 1px solid var(--linea); border-radius: 12px; padding: 20px; margin-bottom: 20px; }
.tarjetas-resumen { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 24px; }
.tarjeta-resumen { background: #fff; border: 1px solid var(--linea); border-radius: 12px; padding: 16px 18px; }
.tarjeta-resumen .numero { font-size: 1.7rem; font-weight: 700; color: var(--navy); }
.tarjeta-resumen .etiqueta { font-size: 0.8rem; color: var(--muted); }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--linea); font-size: 0.9rem; }
th { color: var(--muted); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.03em; }
.campo { margin-bottom: 14px; }
.campo label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 5px; color: var(--navy); }
.campo input, .campo select, .campo textarea {
  width: 100%; padding: 9px 11px; border: 1.5px solid var(--linea); border-radius: 8px; font-size: 0.92rem; font-family: inherit;
}
.fila { display: flex; gap: 12px; }
.fila .campo { flex: 1; }
.btn { padding: 9px 16px; border-radius: 8px; border: none; font-size: 0.88rem; font-weight: 600; cursor: pointer; font-family: inherit; }
.btn-primario { background: var(--copper); color: #fff; }
.btn-secundario { background: #fff; color: var(--navy); border: 1.5px solid var(--navy); }
.btn-peligro { background: #fff; color: var(--error); border: 1.5px solid var(--error); }
.btn-sm { padding: 5px 10px; font-size: 0.8rem; }
.chip { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 0.76rem; font-weight: 600; }
.chip-activa { background: #e7f4ea; color: var(--exito); }
.chip-vencida { background: #fbe9e7; color: var(--error); }
.chip-suspendida { background: #fdf0e0; color: var(--aviso); }
.chip-nunca { background: #eee; color: var(--muted); }
.mensaje-error { display: none; background: #fbe9e7; color: var(--error); padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 0.88rem; }
.mensaje-error.visible { display: block; }
.mensaje-ok { display: none; background: #e7f4ea; color: var(--exito); padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 0.88rem; }
.mensaje-ok.visible { display: block; }
.overlay { display: none; position: fixed; inset: 0; background: rgba(20,42,63,0.5); align-items: center; justify-content: center; z-index: 50; }
.overlay.abierto { display: flex; }
.overlay .card { width: 100%; max-width: 480px; max-height: 90vh; overflow-y: auto; }
.mono { font-family: 'JetBrains Mono', 'Courier New', monospace; }
.vacio { text-align: center; color: var(--muted); padding: 40px 20px; }
a.enlace { color: var(--copper); text-decoration: none; }
a.enlace:hover { text-decoration: underline; }