/* ==========================================================================
   Header Corporativo Definitivo Techno Diet
   ========================================================================== */

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  color: var(--td-color-surface);
  transition: background-color var(--td-transition-normal), box-shadow var(--td-transition-normal), height var(--td-transition-normal);
  background-color: transparent;
}

/* Estado Header Sólido o Scrolled */
.site-header.is-scrolled,
body.has-solid-header .site-header {
  background-color: rgba(8, 17, 13, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}

.nav-shell {
  height: 86px;
  width: min(1500px, calc(100% - 70px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 28px;
  transition: height var(--td-transition-normal);
}

.site-header.is-scrolled .nav-shell {
  height: 72px;
}

/* Keep standard pages clear of the fixed header. Hero pages intentionally
   start behind the transparent navigation and are excluded by body class. */
body.has-solid-header .site-main {
  padding-top: calc(86px + var(--td-space-2xl));
  padding-bottom: var(--td-space-section);
}

/* Logotipo */
.brand {
  flex: 0 0 174px;
  line-height: 0;
}

.brand img {
  width: 100%;
  height: auto;
  max-height: 48px;
  object-fit: contain;
  border-radius: 6px;
}

.brand-title {
  font-family: var(--td-font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--td-color-surface);
}

/* Navegación Principal */
.main-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(15px, 1.6vw, 30px);
  flex: 1;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: clamp(15px, 1.6vw, 30px);
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: var(--td-color-surface);
  text-decoration: none;
  white-space: nowrap;
  font-family: var(--td-font-sans);
  font-weight: 600;
  font-size: 0.72rem;
  line-height: 1;
  opacity: 0.88;
  padding: 0.5rem 0;
  transition: color var(--td-transition-fast), opacity var(--td-transition-fast);
}

.main-nav a:hover,
.main-nav a:focus,
.main-nav .current-menu-item > a,
.main-nav .current_page_item > a,
.main-nav a[aria-current="page"] {
  color: var(--td-color-gold);
  opacity: 1;
}

/* CTA Cabecera */
.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  padding: 0 20px;
  border-radius: var(--td-radius-pill);
  background-color: var(--td-color-gold);
  color: #111a15;
  text-decoration: none;
  white-space: nowrap;
  font-family: var(--td-font-sans);
  font-weight: 700;
  font-size: 0.68rem;
  line-height: 1;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  transition: background-color var(--td-transition-fast), transform var(--td-transition-fast);
}

.header-cta:hover {
  background-color: var(--td-color-gold-light);
  transform: translateY(-2px);
  color: #111a15;
}

.header-cta span {
  font-size: 1.05rem;
}

/* Botón Menú Móvil */
.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px 7px;
  border: 0;
  background: transparent;
  flex-direction: column;
  justify-content: space-around;
  cursor: pointer;
  z-index: 1001;
}

.menu-button i {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--td-color-surface);
  transition: transform var(--td-transition-fast), opacity var(--td-transition-fast);
}

/* Animación botón hamburguesa a cruz */
.menu-button[aria-expanded="true"] i:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-button[aria-expanded="true"] i:nth-child(2) {
  opacity: 0;
}

.menu-button[aria-expanded="true"] i:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}