.header {
    background-color: #f8f8f8; 
    padding: 10px 0; 
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05); 
    position: sticky; 
    top: 0;
    z-index: 100; 
}


.header-items {
    list-style: none; 
    margin: 0;
    padding: 0;
    display: flex; 
    justify-content: center; 
}


.header-item {
    display: block; 
    padding: 10px 20px; 
    text-decoration: none; 
    color: #333; 
    font-weight: 500; 
    transition: color 0.3s ease; 
}

.header-item:hover {
    color: #007bff; 
}

.header-item.active {
    color: #007bff;
    font-weight: bold;
}

.add-button {
    background-color: #007bff; 
    color: white; 
    padding: 8px 16px;
    border-radius: 10px; 
    text-decoration: none; 
    box-shadow: 0 2px 4px rgba(0,0,0,0.2); 
    padding-left: 12px;
}

.add-button:hover {
    background-color: #0056b3; 
}

.add-button i {
    margin-right: 5px; 
}