.library-header {
    background: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    padding: 0.75rem 1rem;
    position: fixed;
    top: 0;
    right: 0;
    left: 220px;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header-title h2 {
    color: #1a1a1a;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.notifications {
    position: relative;
    cursor: pointer;
}

.notifications i {
    color: #6b7280;
    font-size: 1.25rem;
    transition: color 0.2s ease;
}

.notifications:hover i {
    color: #4b5563;
}

.notification-badge {
    position: absolute;
    top: -5px;
    right: -8px;
    background: #dc2626;
    color: white;
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 9999px;
    min-width: 20px;
    text-align: center;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
    transition: background-color 0.2s ease;
}

.user-info:hover {
    background-color: #f3f4f6;
}

.user-name {
    color: #1a1a1a;
    font-weight: 600;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #3b82f6;
    color: white;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    width: 200px;
    background: white;
    border-radius: 0.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    z-index: 50;
    margin-top: 0.5rem;
    overflow: hidden;
}

.dropdown-item {
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #4b5563;
    transition: background-color 0.2s ease;
}

.dropdown-item:hover {
    background-color: #f3f4f6;
}

.dropdown-item i {
    color: #6b7280;
    font-size: 1rem;
}

@media (max-width: 768px) {
    .library-header {
        left: 0;
    }
    
    .header-title h2 {
        font-size: 1.25rem;
    }
    
    .user-name {
        display: none;
    }
}