:root {
  --color-primario: #4f46e5;
  --color-primario-oscuro: #4338ca;
  --color-secundario: #0ea5e9;
  --color-fondo: #f4f6fb;
  --color-superficie: #ffffff;
  --color-texto: #1e2433;
  --color-texto-suave: #6b7280;
  --color-borde: #e5e7eb;
  --color-exito: #16a34a;
  --color-advertencia: #d97706;
  --color-peligro: #dc2626;
  --radio: 12px;
  --sombra: 0 4px 16px rgba(20, 24, 40, 0.06);
  --sombra-hover: 0 8px 24px rgba(20, 24, 40, 0.1);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--color-fondo);
  color: var(--color-texto);
}

a { text-decoration: none; color: inherit; }

/* ===== Layout ===== */
.app-layout { min-height: 100vh; display: flex; flex-direction: column; }

.app-topbar {
  height: 64px;
  background: var(--color-superficie);
  border-bottom: 1px solid var(--color-borde);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 20;
}

.topbar-marca { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.05rem; }
.logo-punto { width: 12px; height: 12px; border-radius: 50%; background: linear-gradient(135deg, var(--color-primario), var(--color-secundario)); display: inline-block; }

.topbar-usuario { display: flex; align-items: center; gap: 12px; }
.usuario-info { display: flex; flex-direction: column; text-align: right; line-height: 1.2; }
.usuario-nombre { font-weight: 600; font-size: 0.9rem; }
.usuario-rol { font-size: 0.75rem; color: var(--color-texto-suave); }
.usuario-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primario), var(--color-secundario));
  color: white; display: flex; align-items: center; justify-content: center; font-weight: 700;
}

.app-body { display: flex; flex: 1; }

.app-sidebar {
  width: 260px;
  background: var(--color-superficie);
  border-right: 1px solid var(--color-borde);
  padding: 20px 12px;
  flex-shrink: 0;
}

.menu-seccion { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-texto-suave); margin: 18px 12px 8px; }
.menu { display: flex; flex-direction: column; gap: 2px; }
.menu-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px; border-radius: 10px; color: var(--color-texto);
  font-size: 0.92rem; font-weight: 500;
}
.menu-item:hover { background: #f1f2fb; }
.menu-item.activo { background: var(--color-primario); color: #fff; }
.menu-icono { font-size: 1.1rem; width: 22px; text-align: center; }

.app-content { flex: 1; padding: 28px 32px; max-width: 100%; }

.solo-movil { display: none; }
.btn-icono { background: none; border: none; font-size: 1.3rem; cursor: pointer; }

/* ===== Encabezado de página ===== */
.encabezado-pagina { margin-bottom: 24px; }
.encabezado-pagina h1 { font-size: 1.5rem; margin: 0 0 4px; }
.encabezado-pagina p { color: var(--color-texto-suave); margin: 0; }

/* ===== Tarjetas ===== */
.grid-tarjetas { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; margin-bottom: 28px; }
.tarjeta {
  background: var(--color-superficie); border-radius: var(--radio); padding: 20px;
  box-shadow: var(--sombra); border: 1px solid var(--color-borde);
}
.tarjeta-metrica .valor { font-size: 1.9rem; font-weight: 700; margin: 6px 0 2px; }
.tarjeta-metrica .etiqueta { color: var(--color-texto-suave); font-size: 0.85rem; }
.tarjeta-metrica .icono { font-size: 1.4rem; }

.panel {
  background: var(--color-superficie); border-radius: var(--radio); border: 1px solid var(--color-borde);
  box-shadow: var(--sombra); padding: 22px; margin-bottom: 24px;
}
.panel-titulo { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; flex-wrap: wrap; gap: 10px; }
.panel-titulo h2 { font-size: 1.1rem; margin: 0; }

/* ===== Formularios ===== */
.form-grupo { margin-bottom: 16px; }
.form-grupo label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 0.88rem; }
.form-control {
  width: 100%; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--color-borde);
  font-size: 0.92rem; background: #fbfbfe;
}
.form-control:focus { outline: none; border-color: var(--color-primario); box-shadow: 0 0 0 3px rgba(79,70,229,0.15); }
.form-ayuda { font-size: 0.78rem; color: var(--color-texto-suave); margin-top: 4px; }
.form-fila { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 700px) { .form-fila { grid-template-columns: 1fr; } }

/* ===== Botones ===== */
.boton {
  display: inline-flex; align-items: center; gap: 6px; justify-content: center;
  padding: 10px 18px; border-radius: 8px; font-weight: 600; font-size: 0.9rem;
  border: none; cursor: pointer; transition: all .15s ease;
}
.boton-primario { background: var(--color-primario); color: #fff; }
.boton-primario:hover { background: var(--color-primario-oscuro); }
.boton-secundario { background: #eef0fb; color: var(--color-primario); }
.boton-secundario:hover { background: #e0e3f8; }
.boton-exito { background: var(--color-exito); color: #fff; }
.boton-peligro { background: var(--color-peligro); color: #fff; }
.boton-sm { padding: 6px 12px; font-size: 0.8rem; }
.boton-bloque { width: 100%; }
.boton:disabled { opacity: .6; cursor: not-allowed; }

/* ===== Tablas ===== */
.tabla-wrap { overflow-x: auto; }
table.tabla { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
table.tabla th { text-align: left; color: var(--color-texto-suave); font-weight: 600; padding: 10px 12px; border-bottom: 2px solid var(--color-borde); white-space: nowrap; }
table.tabla td { padding: 12px; border-bottom: 1px solid var(--color-borde); vertical-align: middle; }
table.tabla tr:hover td { background: #fafbff; }

.badge { padding: 3px 10px; border-radius: 999px; font-size: 0.74rem; font-weight: 700; }
.badge-exito { background: #dcfce7; color: #166534; }
.badge-advertencia { background: #fef3c7; color: #92400e; }
.badge-peligro { background: #fee2e2; color: #991b1b; }
.badge-neutro { background: #e5e7eb; color: #374151; }

.acciones-tabla { display: flex; gap: 6px; flex-wrap: wrap; }

/* ===== Alertas ===== */
.alerta { padding: 12px 16px; border-radius: 10px; margin-bottom: 18px; font-size: 0.9rem; }
.alerta-exito { background: #dcfce7; color: #166534; }
.alerta-error { background: #fee2e2; color: #991b1b; }
.alerta-info { background: #e0f2fe; color: #075985; }

/* ===== Login ===== */
.pagina-login {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #4f46e5 0%, #0ea5e9 100%);
  padding: 20px;
}
.tarjeta-login {
  background: #fff; border-radius: 18px; padding: 40px 36px; width: 100%; max-width: 400px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}
.tarjeta-login h1 { font-size: 1.3rem; margin: 4px 0 4px; }
.tarjeta-login .subtitulo { color: var(--color-texto-suave); font-size: 0.88rem; margin-bottom: 26px; }
.marca-login { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; font-weight: 700; }

.pagina-error { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--color-fondo); }
.tarjeta-error { text-align: center; background: #fff; padding: 50px; border-radius: 16px; box-shadow: var(--sombra); }
.tarjeta-error h1 { font-size: 3rem; margin: 0; color: var(--color-peligro); }

.credenciales-demo { background: #f4f6fb; border-radius: 10px; padding: 12px 14px; font-size: 0.78rem; margin-top: 22px; color: var(--color-texto-suave); }
.credenciales-demo code { background: #fff; padding: 1px 6px; border-radius: 4px; border: 1px solid var(--color-borde); }

/* ===== Responsivo ===== */
@media (max-width: 900px) {
  .solo-movil { display: inline-block; }
  .app-sidebar {
    position: fixed; left: -280px; top: 64px; bottom: 0; z-index: 30;
    transition: left .2s ease; width: 240px;
  }
  .app-sidebar.abierto { left: 0; box-shadow: var(--sombra-hover); }
  .app-content { padding: 20px; }
  .usuario-info { display: none; }
}