:root {
  --color-principal: #00acc1;
  --color-secundario: #ffaa00;
  --color-fondo: #f7f9fb;
  --color-texto: #222;
  --color-blanco: #ffffff;
  --color-negro: #000000;
}

.marca-autor {
  position: fixed;
  bottom: 10px;
  right: 15px;
  font-size: 12px;
  background: rgba(0, 0, 0, 0.4);
  color: white;
  padding: 6px 10px;
  border-radius: 6px;
  opacity: 0.7;
  z-index: 999;
  text-align: right;
  pointer-events: none;
}

nav ul li a {
  padding: 10px;
  color: var(--color-texto);
  font-weight: 500;
  text-decoration: none;
  transition: 0.2s;
}

nav ul li a.active {
  color: var(--color-principal);
  border-bottom: 2px solid var(--color-principal);
  font-weight: bold;
}

/* Ocultar los overlays por defecto modales*/
.overlay {
  display: none;
  opacity: 0;
  pointer-events: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  justify-content: center;
  align-items: center;
  backdrop-filter: blur(10px);
  background-color: rgba(0, 0, 0, 0.4);
  z-index: 9999;
  transition: all 0.3s ease;
}

/* Mostrar modal al activar .visible */
.overlay.visible {
  display: flex;
  opacity: 1;
  pointer-events: auto;
}


#modal-renovar form label {
  margin-top: 16px;
  font-weight: bold;
  color: #c4c4c4;
  display: block;
}