body {
    font-family: "Segoe UI", sans-serif;
    background: linear-gradient(135deg, #f0f8ff, #d0f0c0);
    color: #333;
    margin: 0;
    padding: 0;
}

header {
    background-color: #4a90e2;
    color: white;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

main {
    padding: 2rem;
}

h2 {
    color: #4a90e2;
}

ul {
    list-style-type: "✔️ ";
    padding-left: 1.5rem;
}

button {
    background-color: #28a745;
    border: none;
    color: white;
    padding: 1rem 2rem;
    font-size: 1rem;
    margin-top: 1rem;
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.3s;
}

button:hover {
    background-color: #218838;
}

#start-message {
    font-weight: bold;
    color: #4a90e2;
    margin-top: 1rem;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: 3rem;
}

a.btn {
    display: inline-block;
    background-color: #007bff;
    color: white;
    padding: 0.75rem 1.5rem;
    margin-top: 2rem;
    text-decoration: none;
    border-radius: 8px;
    transition: background 0.3s;
}

a.btn:hover {
    background-color: #0056b3;
}