:root {
  --header-height: 72px;
}

/* --- RESET --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* --- TOP BAR --- */
.top-bar {
  height: var(--header-height);
  background: var(--color-blue-dark);
  color: var(--color-white);
  padding: 6px 0;
  text-align: center;
}

#header {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease;
}

#header.loaded {
  opacity: 1;
  visibility: visible;
}

/* --- HEADER --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: var(--color-white);
  z-index: 1000;
  display: flex;
  transition: box-shadow 0.25s ease;
}

.site-header.has-shadow {
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.header-inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between; /* desktop default */
  padding: 0 2rem; /* más flexible en desktop */
}

.logo {
  display: flex;
  align-items: center;
  height: 100%;
}

.logo img {
  height: 52px;
  width: auto;
  object-fit: contain;
}

/* --- NAV LINKS --- */
.site-nav ul {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.site-nav a {
  text-decoration: none;
}

.site-nav a,
.mobile-menu a {
  color: var(--color-blue-dark);
  font-weight: 600;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--color-green);
}

/* --- MOBILE MENU --- */
.menu-toggle {
  background: none;
  border: none;
  cursor: pointer;
  display: none; /* solo se activa en mobile */
}

.mobile-menu {
  position: fixed;
  top: var(--header-height);
  left: -100%;
  width: 85%;
  height: calc(100vh - var(--header-height));
  background: #fff;
  padding-top: 1.5rem;
  z-index: 950;
  transition: left 0.3s ease;
}

/* Se mantiene en el DOM para animación, oculto por opacidad */
.mobile-menu.open {
  left: 0;
}

.mobile-menu ul {
  list-style: none;
  padding: 0 1.5rem;
}

.mobile-menu li {
  border-bottom: 1px solid var(--color-green-light);
}

.mobile-menu li:last-child {
  border-bottom: none;
}

.mobile-menu a {
  display: block;
  padding: 1rem 0;
  font-size: 0.95rem;
}

/* --- MOBILE OVERLAY --- */
.mobile-menu-overlay {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  height: calc(100vh - var(--header-height));
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(2px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease;
  z-index: 900;
  display: flex;
  flex-direction: column;
}

.mobile-menu-overlay.open {
  opacity: 1;
  visibility: visible;
}

/* --- MOBILE SOCIAL --- */
.mobile-social {
  width: 100%;
  position: absolute;
  bottom: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
}

.mobile-social a {
  display: flex;
  gap: 1rem;
}

.mobile-social img {
  width: 20px;
  height: 20px;
  filter: invert(15%) sepia(80%) saturate(5000%) hue-rotate(190deg) brightness(95%) contrast(90%);
}

/* --- ICONS --- */
.icon {
  width: 24px;
  height: 24px;
}

.icon-close {
  display: none;
  color: var(--color-green);
}

.menu-open .icon-menu {
  display: none;
}

.menu-open .icon-close {
  display: block;
}

/* --- DESKTOP MENU --- */
@media (min-width: 769px) {
  .site-header {
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  }

  .header-inner {
    justify-content: space-between; /* logo a la izquierda, nav a la derecha */
    padding: 0 5rem;
  }

  .menu-toggle {
    display: none;
  }

  .site-nav {
    display: block;
  }

  .logo {
    position: static;
    transform: none;
  }

  .mobile-menu,
  .mobile-menu-overlay {
    display: none !important;
  }
}

/* --- MOBILE RESPONSIVE --- */
@media (max-width: 768px) {
  body.menu-open {
    overflow: hidden;
    height: 100%;
  }

  .site-nav {
    display: none;
  }

  .site-header.has-shadow {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  }

  .header-inner {
    justify-content: center; /* logo centrado en mobile */
    padding: 0 2rem;
  }

  .menu-toggle {
    display: block;
    position: absolute;
    left: 1rem;
  }

  .logo {
    position: relative;
  }
}