body {
    background: rgb(255,255,255);
    background: linear-gradient(90deg, rgba(255,255,255,1) 39%, rgba(73,239,226,1) 100%);
    background-position: center;
}
nav a:hover {
    text-decoration: underline;
    color: #007bff;
    transition: color 0.3s;
}
.btn-custom {
    background-color: #007bff;
    color: #fff;
    border: none;
}
.btn-custom:hover {
    background-color: #0056b3;
    transition: background-color 0.3s;
}
footer {
    background-color: #343a40;
    color: #f8f9fa;
    padding: 20px 0;
}
footer a {
    color: #007bff;
}
footer a:hover {
    color: #0056b3;
}
.back-button {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 1000;
}