/* ==================== VARIABLES ==================== */
:root {
  --nav-height: 80px;
  --nav-height-mobile: 70px;
  --nav-padding-desktop: 60px;
  --nav-padding-tablet: 40px;
  --nav-padding-mobile: 20px;
}

/* ==================== NAVEGACIÓN PRINCIPAL ==================== */
.menu {
  position: sticky;
  top: 0;
  z-index: 100;

  background-color: var(--bg-cream);
  border-bottom: 1px solid var(--border-light);

  padding: 0 var(--nav-padding-desktop);
  height: var(--nav-height);

  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Logo y título */
.logo a {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-img {
  width: 36px;
  height: 36px;
}

.logo h1 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: -0.02em;
}

/* Enlaces de navegación */
.links {
  display: flex;
  align-items: center;
  gap: 40px;
}

.links a {
  color: var(--text-medium);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: 0.35s ease;
  position: relative;
}

.links a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-red);
  transform: scaleX(0);
  transform-origin: left;
  transition: 0.35s ease;
}

.links a:hover {
  color: var(--text-dark);
}

.links a:hover::after {
  transform: scaleX(1);
}

/* Botón de compra */
.menu-btn {
  padding: 10px 24px;
  background-color: var(--text-dark);
  color: var(--bg-white);
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
  transition: 0.35s ease;
  border: none;
  cursor: pointer;
}

.menu-btn:hover {
  background-color: var(--accent-red);
  transform: translateY(-2px);
}

/* Visibilidad según dispositivo */
.mobile-only-btn {
  display: none;
}

.desktop-only-btn {
  display: block;
}

/* ==================== MENÚ HAMBURGUESA ==================== */
.hamburger-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  z-index: 1001;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.hamburger-btn svg {
  width: 24px;
  height: 24px;
  color: var(--text-dark);
  transition: transform 0.3s ease, color 0.3s ease;
}

.hamburger-btn:hover {
  background-color: var(--bg-cream);
}

.hamburger-btn:hover svg {
  color: var(--accent-red);
}

.hamburger-btn .hidden {
  display: none;
}

/* Rotar icono cuando el menú está abierto */
.menu.open .hamburger-btn svg {
  transform: rotate(180deg);
  color: var(--accent-red);
}

/* ==================== MENÚ MÓVIL ==================== */
.mobile-menu {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;

  background-color: var(--bg-white);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);

  display: flex;
  flex-direction: column;
  padding: 24px;
  gap: 8px;

  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all 0.35s ease-in-out;
  z-index: 99;

  border-bottom: 2px solid var(--accent-red);
}

.mobile-menu.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-menu a {
  color: var(--text-dark);
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
  padding: 14px 16px;
  border: 1px solid transparent;
  border-radius: 8px;

  transition: all 0.3s ease;

  cursor: pointer;
}

.mobile-menu a:hover {
  background-color: var(--bg-cream);
  border-color: var(--border-light);
  color: var(--accent-red);
}

.mobile-menu .mobile-buy-btn {
  background-color: var(--text-dark);
  color: var(--bg-white);
  text-align: center;
  font-weight: 600;
  margin-top: 16px;
  padding: 16px;
  border: none;
}

.mobile-menu .mobile-buy-btn:hover {
  background-color: var(--accent-red);
  color: white;
  transform: translateY(-2px);
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 1024px) {
  .menu {
    padding: 0 var(--nav-padding-tablet);
  }

  /* Mostrar hamburguesa */
  .hamburger-btn {
    display: block;
  }

  /* Ocultar menú desktop */
  .links {
    display: none;
  }

  /* Ocultar botón desktop */
  .desktop-only-btn {
    display: none;
  }
}

@media (max-width: 768px) {
  .menu {
    padding: 0 var(--nav-padding-mobile);
    height: var(--nav-height-mobile);
  }

  .mobile-menu {
    top: var(--nav-height-mobile);
  }

  .logo h1 {
    font-size: 18px;
  }

  .logo-img {
    width: 32px;
    height: 32px;
  }

  /* Mostrar botón móvil */
  .mobile-only-btn {
    display: block;
    width: 100%;
    text-align: center;
    margin-top: 16px;
  }
}