body {
    font-family: Arial, sans-serif;
    background: #e3f2fd;
    margin: 0;
    padding: 0;
    color: #01579b;
}

.container {
    max-width: 500px;
    margin: 40px auto;
    padding: 20px;
    background: #ffffff;
    border-radius: 15px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    text-align: left;
}

h1 {
    text-align: center;
    color: #0277bd;
}

input[type="number"] {
    padding: 10px;
    width: 100%;
    border: 1px solid #81d4fa;
    border-radius: 5px;
}

button {
    background-color: #0288d1;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    display: block;
    margin: 0 auto;
}

button:hover {
    background-color: #0277bd;
}

.resultado {
    margin-top: 20px;
    text-align: center;
}

#mensajeEducativo {
    margin-top: 10px;
    font-weight: bold;
}