* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
 }

 body {
    font-family: Arial, sans-serif;
    background-color: #f0f2f5;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
 }

main {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    width: 90%;
    max-width: 400px;
    text-align: center;
}

.entrada-container {
    margin-bottom: 20px;
    margin-bottom: 25px;
}

h1 {
    font-size: 1.8rem;
    color: #007BFF;
    margin-bottom: 20px;
}

p {
    margin-bottom: 10px;
    font-size: 0.9rem;
    color: #555555;
}

#numeroInput {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
    text-align: center;
    margin-bottom: 15px;
}

#calcularBtn {
    width: 100%;
    padding: 12px;
    background-color: #007BFF;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#calcularBtn:hover {
    background-color: #0056b3;
}

#resultadoContainer {
    margin-top: 20px;
    text-align: left;
    font-size: 1.1rem;
    line-height: 1.6;
}