body {
    background: #0aff4f;
    color: #000;
    font-family: 'Segoe UI', sans-serif;
    text-align: center;
    margin: 0;
    padding: 0;
}
nav {
    padding: 1rem;
}
ul {
    list-style-type: none;
    padding: 0;
}
button {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 1.2rem;
    background-color: #00bfff;
    color: #000;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}
button:hover {
    background-color: #0099cc;
}
.btn-roadmap {
    display: inline-block;
    background: #00bfff;
    color: white;
    padding: 10px 20px;
    margin-left: 12px;
    border-radius: 6px;
    font-weight: bold;
    text-decoration: none;
    transition: background 0.3s ease;
}

    .btn-roadmap:hover {
        background: #0088cc;
    }