/* ─── Site Header (Modern Gold-Red Oriental) ────────────────────────────────── */

.site-header {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 3px solid var(--color-primary);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all var(--transition-base);
}

.header-logo-img {
    height: 52px;
    width: auto;
    display: block;
    transition: transform var(--transition-base);
}

.header-logo:hover .header-logo-img {
    transform: scale(1.03);
}

.header-navbar {
    background: transparent;
    border-top: none;
}

.header-navbar .navbar-nav {
    gap: 8px;
}

.header-navbar .nav-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-secondary);
    font-family: var(--font-family);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-md);
    padding: 24px 16px;
    position: relative;
    transition: all var(--transition-base);
    border-radius: 0;
}

.header-navbar .nav-link i {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-base);
}

.header-navbar .nav-link:hover i {
    transform: scale(1.2) translateY(-1px);
}

/* Hover underline effect */
.header-navbar .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
    transition: all var(--transition-base);
    transform: translateX(-50%);
}

.header-navbar .nav-link:hover {
    color: var(--color-primary);
    background: transparent;
}

.header-navbar .nav-link:hover::after {
    width: 80%;
}

/* Active page styling */
.header-navbar .nav-item.active .nav-link,
.header-navbar .nav-link:focus {
    color: var(--color-primary);
}

/* Mobile responsive */
@media (max-width: 991px) {
    .header-navbar .navbar-collapse {
        background: var(--color-surface);
        position: absolute;
        top: 100%;
        left: -12px;
        right: -12px;
        box-shadow: var(--shadow-lg);
        border-bottom: 3px solid var(--color-accent);
        border-top: 1px solid var(--color-border);
        padding: 16px;
        border-radius: 0 0 var(--radius-md) var(--radius-md);
    }

    .header-navbar .nav-link {
        padding: 12px 16px;
        border-radius: var(--radius-sm);
        width: 100%;
    }

    .header-navbar .nav-link::after {
        display: none;
    }

    .header-navbar .nav-link:hover {
        background-color: var(--color-border-light);
    }

    .header-navbar .navbar-nav {
        align-items: flex-start !important;
        gap: 4px;
        width: 100%;
    }
}