/**
 * 05 - Header
 * Site header + primary navigation (desktop + shared styles).
 *
 * Note: Responsive behaviors (mobile menu layout, typography scaling, etc.)
 * remain in `assets/css/main.css` until Phase 5 (responsive consolidation).
 */

/* ==========================================================================
   Header - Lantern Medical Brand
   ========================================================================== */

.site-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-bottom: 3px solid var(--color-accent);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

/* Site Branding */
.site-branding {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-width: 0;
}

.medgas-facility-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
}

.medgas-facility-brand__media {
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.24);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.medgas-facility-brand__media.has-logo {
    background: rgba(255, 255, 255, 0.96);
}

.medgas-facility-brand__logo {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 0.375rem;
}

.medgas-facility-brand__initials {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    color: var(--color-text-white);
    font-size: 0.95rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.medgas-facility-brand__content {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.medgas-facility-brand__eyebrow {
    margin: 0;
    color: rgba(244, 213, 141, 0.9);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    line-height: 1;
    text-transform: uppercase;
}

.medgas-facility-brand__name {
    color: var(--color-text-white);
    font-size: 0.98rem;
    font-weight: 700;
    line-height: 1.2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.medgas-facility-brand--header {
    max-width: min(24rem, 38vw);
    padding-left: 0.875rem;
    border-left: 1px solid rgba(255, 255, 255, 0.2);
}

@media (max-width: 782px) {
    .site-branding {
        gap: 0.75rem;
    }

    .medgas-facility-brand--header {
        max-width: min(16rem, 46vw);
        padding-left: 0.625rem;
    }

    .medgas-facility-brand--header .medgas-facility-brand__eyebrow {
        display: none;
    }

    .medgas-facility-brand--header .medgas-facility-brand__media {
        width: 2.4rem;
        height: 2.4rem;
        border-radius: 12px;
    }

    .medgas-facility-brand--header .medgas-facility-brand__name {
        font-size: 0.9rem;
    }
}

.custom-logo-link {
    display: block;
    line-height: 0;
    flex-shrink: 0;
}

.custom-logo {
    height: 52px;
    width: auto;
    transition: all var(--transition-base);
}

.custom-logo:hover {
    opacity: 0.9;
    transform: scale(1.02);
}

.site-identity {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.site-title {
    margin: 0;
    font-size: 1.75rem;
    font-family: var(--font-family-headings);
    font-weight: 700;
    letter-spacing: -0.01em;
    line-height: 1.2;
}

.site-title a {
    color: var(--color-text-white);
    transition: color var(--transition-base);
    text-decoration: none;
}

.site-title a:hover {
    color: var(--color-accent-light);
}

.site-description {
    margin: 0;
    font-size: 0.875rem;
    color: var(--color-accent-light);
    font-weight: 500;
    line-height: 1.3;
}

/* Main Navigation */
.main-navigation {
    flex: 1 1 auto;
    display: flex;
    justify-content: center;
}

.main-navigation ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 0.5rem;
}

.main-navigation li {
    position: relative;
}

.main-navigation a {
    display: block;
    padding: 0.75rem 1.25rem;
    color: var(--color-text-white);
    font-family: var(--font-family-body);
    font-weight: 600;
    font-size: 0.9375rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
}

.main-navigation a:hover,
.main-navigation a:focus {
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--color-accent-light);
}

.main-navigation .current-menu-item > a,
.main-navigation .current_page_item > a,
.main-navigation .current-menu-ancestor > a,
.main-navigation .current_page_ancestor > a,
.main-navigation .current_page_parent > a {
    background-color: rgba(255, 255, 255, 0.25);
    color: var(--color-accent);
    font-weight: 700;
}

.main-navigation a::after {
    content: '';
    position: absolute;
    bottom: 0.5rem;
    left: 1.25rem;
    right: 1.25rem;
    height: 2px;
    background-color: var(--color-accent);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.main-navigation a:hover::after,
.main-navigation .current-menu-item > a::after,
.main-navigation .current_page_item > a::after,
.main-navigation .current-menu-ancestor > a::after,
.main-navigation .current_page_ancestor > a::after,
.main-navigation .current_page_parent > a::after {
    transform: scaleX(1);
}

/* Branded support link (desktop + mobile nav) */
.main-navigation .menu-item-support > a {
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    gap: 0.5rem;
}

.menu-support-icon {
    width: 1.3rem;
    height: 1.3rem;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.8rem;
    font-weight: 800;
    line-height: 1;
    color: var(--color-primary-dark);
    background: var(--color-accent);
    border: 1px solid rgba(255, 255, 255, 0.35);
}

.menu-support-label {
    font-weight: 700;
}

/* Menu Toggle (Mobile) */
.menu-toggle {
    display: none;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    color: var(--color-text-white);
    cursor: pointer;
    padding: 0.625rem;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all var(--transition-base);
}

.menu-toggle:hover,
.menu-toggle:focus {
    background: rgba(255, 255, 255, 0.2);
    border-color: var(--color-accent);
    transform: scale(1.05);
}

.menu-toggle:active {
    transform: scale(0.98);
}

/* Hamburger Icon */
.menu-toggle-icon {
    display: block;
    position: relative;
    width: 24px;
    height: 2px;
    background-color: var(--color-text-white);
    transition: all var(--transition-base);
}

.menu-toggle-icon::before,
.menu-toggle-icon::after {
    content: '';
    position: absolute;
    left: 0;
    width: 24px;
    height: 2px;
    background-color: var(--color-text-white);
    transition: all var(--transition-base);
}

.menu-toggle-icon::before {
    top: -7px;
}

.menu-toggle-icon::after {
    top: 7px;
}

/* Active State - Animate to X */
.menu-toggle[aria-expanded="true"] .menu-toggle-icon {
    background-color: transparent;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-icon::before {
    top: 0;
    transform: rotate(45deg);
    background-color: var(--color-accent);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-icon::after {
    top: 0;
    transform: rotate(-45deg);
    background-color: var(--color-accent);
}

/* User Actions */
.user-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding-left: var(--spacing-md);
    border-left: 1px solid rgba(255, 255, 255, 0.2);
}

.user-name {
    color: var(--color-accent-light);
    font-family: var(--font-family-body);
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.header-support-link {
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    gap: 0.45rem;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-md);
    border: 0;
    color: var(--color-text-white);
    font-family: var(--font-family-body);
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none;
    position: relative;
    transition: all var(--transition-base);
}

.header-support-link:hover,
.header-support-link:focus {
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--color-accent-light);
}

.header-support-link::after {
    content: '';
    position: absolute;
    bottom: 0.5rem;
    left: 1.25rem;
    right: 1.25rem;
    height: 2px;
    background-color: var(--color-accent);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.header-support-link:hover::after,
.header-support-link.is-current::after {
    transform: scaleX(1);
}

.header-support-link.is-current {
    background-color: rgba(255, 255, 255, 0.25);
    color: var(--color-accent);
    font-weight: 700;
}

/* User name as link to Account page */
a.user-name {
    text-decoration: none;
    transition: color var(--transition-base);
}

a.user-name:hover,
a.user-name:focus {
    color: var(--color-text-white);
}

.logout-link {
    color: var(--color-text-white);
    padding: 0.5rem 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    font-family: var(--font-family-body);
    font-size: var(--font-size-sm);
    font-weight: 600;
    transition: all var(--transition-base);
}

.logout-link:hover,
.logout-link:focus {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: var(--color-accent);
    color: var(--color-accent-light);
}

.header-cart-link {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.5rem 0.8rem;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: var(--color-text-white);
    text-decoration: none;
    background: rgba(255, 255, 255, 0.08);
    transition: all var(--transition-base);
}

.header-cart-link:hover,
.header-cart-link:focus {
    border-color: var(--color-accent);
    background: rgba(255, 255, 255, 0.18);
    color: var(--color-accent-light);
}

.header-cart-icon {
    color: #f4c542;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.header-cart-icon-svg {
    width: 1.1rem;
    height: 1.1rem;
    fill: currentColor;
}

.header-cart-text {
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.header-cart-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.3rem;
    height: 1.3rem;
    padding: 0 0.3rem;
    border-radius: 999px;
    background: var(--color-accent);
    color: #11434f;
    font-size: 0.72rem;
    font-weight: 700;
    line-height: 1;
}