/* Header & Navigation */

/* Site Header - Two-tier Layout */
.site-header {
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
}

/* Header Top - Branding Section */
.header-top {
    background-color: var(--color-background);
    padding: var(--spacing-lg) 0 var(--spacing-md) 0;
    text-align: center;
}

.site-tagline {
    font-size: 0.75rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.5px;
}

.site-branding {
    display: inline-block;
}

.site-title {
    margin: 0;
    line-height: 1.2;
}

.site-title a {
    display: inline-block;
}

.site-title a:hover {
    opacity: 0.8;
}

/* SVG Logo */
.site-logo {
    height: 20px;
    width: auto;
    display: block;
}

/* Header Bottom - Navigation Section */
.header-bottom {
    border-top: 1px solid var(--color-border);
}

.main-navigation {
    text-align: center;
    display: flex;
    justify-content: center;
}

.main-navigation ul {
    display: inline-flex;
    gap: 48px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-navigation li {
    position: relative;
}

.main-navigation a {
    display: inline-block;
    padding: 16px 0;
    color: var(--color-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s;
    position: relative;
}

.main-navigation a:hover {
    color: var(--color-primary);
}

/* Active Menu Item - Red Underline */
.main-navigation .current-menu-item>a,
.main-navigation .current_page_item>a {
    color: var(--color-secondary);
}

.main-navigation .current-menu-item>a::after,
.main-navigation .current_page_item>a::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--color-primary);
}

/* Hover Underline Effect */
.main-navigation a::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    right: 50%;
    height: 2px;
    background-color: var(--color-primary);
    transition: left 0.2s, right 0.2s;
}

.main-navigation a:hover::before {
    left: 0;
    right: 0;
}

/* Override hover effect for active items */
.main-navigation .current-menu-item>a::before,
.main-navigation .current_page_item>a::before {
    display: none;
}

/* Mobile Header & Navigation */

/* Desktop header sections visible by default */
.header-top,
.header-bottom {
    display: block;
}

/* Hide mobile header by default (show on mobile only) */
.header-mobile {
    display: none;
}

/* Hide mobile navigation by default */
.mobile-navigation {
    display: none;
}

/* Mobile Header Layout */
@media (max-width: 768px) {

    /* Make header sticky on mobile */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        transform: translateY(0);
        transition: transform 0.3s ease, opacity 0.3s ease;
        opacity: 1;
        background-color: var(--color-background);
    }

    /* Hidden state when scrolling down */
    .site-header.header-hidden {
        transform: translateY(-100%);
        opacity: 0;
    }

    /* Add padding to body to prevent content jump */
    body {
        padding-top: 80px;
    }

    /* Hide desktop header sections on mobile */
    .header-top,
    .header-bottom {
        display: none;
    }

    /* Show mobile header */
    .header-mobile {
        display: block;
        background-color: var(--color-background);
        border-bottom: 1px solid var(--color-border);
        padding: var(--spacing-md) 0;
    }

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

    /* Mobile Branding */
    .header-mobile .site-branding {
        flex: 1;
    }

    .header-mobile .site-tagline {
        font-size: 11px;
        color: var(--color-secondary);
        margin-bottom: 4px;
        letter-spacing: 0.5px;
    }

    .header-mobile .site-logo {
        height: 16px;
        width: auto;
    }

    .header-mobile .site-title {
        margin: 0;
        line-height: 0;
    }

    .header-mobile .site-title a {
        display: inline-block;
    }

    /* Mobile Header Icons - Right Side */
    .mobile-header-icons {
        display: flex;
        align-items: center;
        gap: 16px;
    }

    .search-toggle,
    .menu-toggle {
        background: none;
        border: none;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--color-secondary);
        transition: color 0.2s;
    }

    .search-toggle:hover,
    .menu-toggle:hover {
        color: var(--color-primary);
    }

    .search-toggle svg {
        width: 28px;
        height: 28px;
    }

    /* Hamburger Menu Icon */
    .menu-toggle {
        width: 32px;
        height: 32px;
        position: relative;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
    }

    .menu-bar {
        display: block;
        width: 24px;
        height: 2px;
        background-color: var(--color-secondary);
        transition: all 0.3s ease;
    }

    /* Hamburger Animation when Active */
    .menu-toggle[aria-expanded="true"] .menu-bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

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

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

    /* Mobile Navigation Menu */
    .mobile-navigation {
        display: none;
        background-color: var(--color-background);
        border-bottom: 1px solid var(--color-border);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .mobile-navigation.active {
        display: block;
        max-height: 500px;
    }

    .mobile-navigation ul {
        list-style: none;
        margin: 0;
        padding: var(--spacing-md) 0;
    }

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

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

    .mobile-navigation a {
        display: block;
        padding: var(--spacing-md);
        color: var(--color-secondary);
        font-size: 0.95rem;
        transition: background-color 0.2s, color 0.2s;
    }

    .mobile-navigation a:hover {
        background-color: var(--color-surface);
        color: var(--color-primary);
    }

    .mobile-navigation .current-menu-item>a,
    .mobile-navigation .current_page_item>a {
        color: var(--color-primary);
        background-color: var(--color-surface);
    }
}