/* ============================================================
   SECCIÓN: NAVEGACIÓN
============================================================ */
.navegacion{
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: clamp(0.6rem, 1.5vw, 1.5rem) clamp(0.75rem, 3.5vw, 2.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(0.5rem, 2vw, 1.5rem);
  width: 100dvw;
  max-width: 100%;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: color-mix(in srgb, var(--color-fondo) 75%, transparent);
  border-bottom: 1px solid var(--color-borde);
  transition: var(--transicion-fluida);
}

.navegacion__logo {
  font-family: var(--fuente-display);
  font-weight: 800;
  font-size: clamp(0.75rem, 2.2vw, 1.3rem);
  letter-spacing: -0.03em;
  color: var(--color-texto-primario);
  white-space: nowrap;
  flex-shrink: 0;
}

.navegacion__logo span {
  color: var(--color-acento);
}

.navegacion__enlaces {
  display: flex;
  list-style: none;
  gap: clamp(0.75rem, 2.5vw, 2.5rem);
  align-items: center;
  flex: 1;
  justify-content: center;
}

.navegacion__enlaces a {
  font-size: clamp(0.7rem, 1.4vw, 0.9rem);
  font-weight: 500;
  color: var(--color-texto-secundario);
  letter-spacing: 0.01em;
  position: relative;
  transition: color 0.25s;
  padding: 0.4rem 0;
}

.navegacion__enlaces a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1.5px;
  background: var(--color-acento);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.navegacion__enlaces a:hover {
  color: var(--color-texto-primario);
}

.navegacion__enlaces a:hover::after {
  width: 100%;
}

.navegacion__controles {
  display: flex;
  align-items: center;
  gap: clamp(0.6rem, 1.5vw, 1rem);
  flex-shrink: 0;
}

.boton-tema {
  width: clamp(36px, 8vw, 44px); 
  height: clamp(20px, 4.5vw, 24px);
  background: var(--color-superficie);
  border: 1.5px solid var(--color-borde);
  border-radius: 99px;
  cursor: none;
  position: relative;
  transition: var(--transicion-fluida);
  flex-shrink: 0;
}

.boton-tema::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 3px;
  width: clamp(12px, 3vw, 16px);
  height: clamp(12px, 3vw, 16px);
  background: var(--color-acento);
  border-radius: 50%;
  transform: translateY(-50%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-tema="oscuro"] .boton-tema::after {
  transform: translateY(-50%) translateX(clamp(12px, 3vw, 20px));
}

.navegacion__menu-movil {
  display: none;
  flex-direction: column;
  gap: clamp(4px, 1vw, 5px);
  cursor: none;
  padding: clamp(4px, 1vw, 8px);
  background: none;
  border: none;
  flex-shrink: 0;
}

.navegacion__menu-movil span {
  width: clamp(18px, 5vw, 24px);
  height: clamp(1.5px, 0.5vw, 2.5px);
  background: var(--color-texto-primario);
  border-radius: 2px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: center;
}

.navegacion__menu-movil[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translateY(12px);
}

.navegacion__menu-movil[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.navegacion__menu-movil[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translateY(-12px);
}