body {
    font-family: Arial, sans-serif;
    background: #f2f2f2;
}

.container {
    max-width: 350px;
    margin: 80px auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

input {
    width: 90%;
    padding: 10px;
    margin: 10px 0;
}

button {
    padding: 10px 20px;
    background: #287bff;
    border: none;
    color: white;
    border-radius: 6px;
    cursor: pointer;
}

button:hover {
    background: #1a5ec8;
}

#resultado {
    margin-top: 15px;
    font-size: 1.2rem;
    font-weight: bold;
}