/* Header & Nav */
.main-header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: var(--nav-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    font-family: var(--font-heading);
    letter-spacing: -1px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo img {
    height: 40px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    padding-bottom: 4px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background: var(--accent-gradient);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.theme-toggle {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.25rem;
    transition: color 0.3s ease;
}

.admin-link {
    color: var(--text-secondary);
    font-size: 1.4rem;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
}

.admin-link:hover {
    color: var(--accent-primary);
}

.theme-toggle:hover {
    color: var(--accent-primary);
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--text-primary);
}

.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-nav-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-drawer {
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100vh;
    background: var(--bg-card);
    background: var(--bg-body);
    border-left: 1px solid var(--border-color);
    z-index: 1002;
    padding: 2rem;
    transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}

.mobile-nav-drawer.active {
    right: 0;
}

.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.close-menu {
    background: transparent;
    border: none;
    font-size: 1.8rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.mobile-nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.mobile-nav-link {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-primary);
    display: block;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
    color: var(--accent-primary);
    padding-left: 10px;
    transition: all 0.2s;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-toggle {
        display: block;
    }
}

/* Layout Offset */
.site-main {
    margin-top: 80px;
    min-height: calc(100vh - 80px - 300px);
}