body {
    font-family: "Segoe UI", sans-serif;
    background: #fefefe;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 500px;
    margin: 20px auto;
    padding: 15px;
    background: #fff;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    border-radius: 12px;
    text-align: center;
}

h1 {
    color: #333;
}

.number-set {
    margin-top: 20px;
}

.number-set h2 {
    font-size: 1.2em;
    margin: 10px 0;
    color: #222;
}

span {
    color: #007bff;
    font-weight: bold;
}

strong {
    color: #e91e63;
}

button {
    padding: 10px 20px;
    font-size: 1em;
    background-color: #28a745;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 20px;
}

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