.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    padding: 0.75rem 0;
    transition: all var(--transition-normal);
}

.site-header--floating {
    transform: translateY(-100%);
    opacity: 0;
    background-color: transparent;
}

.site-header--floating.is-visible {
    transform: translateY(0);
    opacity: 1;
    background-color: var(--color-bg-primary);
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-branding {
    flex-shrink: 0;
}

.site-branding .site-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-heading);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.site-branding .site-title:hover {
    color: var(--color-primary);
}

.site-branding .custom-logo {
    max-height: 40px;
    width: auto;
}

/* Navigation - oculta por defecto */
.main-navigation {
    display: none;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-menu li a {
    display: block;
    padding: 0.5rem 0.75rem;
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: var(--font-weight-regular);
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.nav-menu li a:hover,
.nav-menu li a.is-active {
    color: var(--color-text-heading);
}

.nav-menu__cta {
    margin-left: var(--space-xs);
}

.nav-btn {
    display: inline-block;
    padding: 0.4rem 1rem;
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.05em;
    color: var(--color-primary) !important;
    background-color: color-mix(in srgb, var(--color-primary) 10%, transparent);
    border: 1px solid var(--color-primary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.nav-btn:hover {
    background-color: color-mix(in srgb, var(--color-primary) 20%, transparent);
}

/* Menu toggle (hamburguesa) */
.menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 0;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 10;
}

.menu-toggle__bar {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text-heading);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu overlay */
.mobile-menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
    z-index: 998;
}

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

/* Mobile: menú lateral drawer */
@media (max-width: 1023px) {
    .main-navigation {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        left: auto;
        width: 85%;
        max-width: 320px;
        background-color: var(--color-bg-surface);
        display: flex !important;
        justify-content: center;
        align-items: center;
        transform: translateX(100%);
        visibility: hidden;
        transition: transform var(--transition-normal), visibility var(--transition-normal);
        z-index: 999;
        box-shadow: -4px 0 16px rgba(0, 0, 0, 0.1);
    }

    .main-navigation.is-open {
        transform: translateX(0);
        visibility: visible;
    }

    .main-navigation .nav-menu {
        flex-direction: column;
        gap: var(--space-sm);
        padding: var(--space-xl) var(--space-lg);
    }

    .main-navigation .nav-menu li a {
        font-size: 1.25rem;
        padding: var(--space-sm) var(--space-lg);
    }

    .main-navigation .nav-menu__cta {
        margin-left: 0;
        margin-top: var(--space-md);
    }

    .main-navigation .nav-btn {
        font-size: 1rem;
        padding: 0.6rem 1.5rem;
    }
}

/* Desktop: menú fijo en la parte superior derecha */
@media (min-width: 1024px) {
    .menu-toggle {
        display: none;
    }

    .main-navigation {
        display: block;
        position: fixed;
        top: 0;
        right: 0;
        z-index: calc(var(--z-sticky) + 1);
        padding: 0.75rem var(--container-padding);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-100%);
        transition: all var(--transition-normal);
    }

    /* Solo se muestra cuando el header es visible (scroll) */
    .main-navigation.is-header-visible {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
}

/* Header simple para páginas internas */
.site-header--simple {
    background-color: var(--color-bg-primary);
    box-shadow: var(--shadow-sm);
}

.site-header--simple .nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.site-header--simple .nav-btn .material-symbols-outlined {
    font-size: 1rem;
}