#header {
    font-size: 4em; 
    color: #0071C5;
    background: linear-gradient(to right, #0071C5, #00BFFF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    padding: 5px; 
    border-radius: 5px;
    margin-bottom: 5px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.btn {
    background-color: #0071C5; 
    color: white;
}

.text-center {
    text-align: center;
}