body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}
header {
    background-color: #007BFF;
    color: white;
    padding: 10px;
    text-align: center;
}
nav a {
    color: white;
    margin: 0 10px;
    text-decoration: none;
}
main {
    max-width: 800px;
    margin: 20px auto;
    padding: 0 20px;
}
form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 400px;
    margin: 20px auto;
}
input, button {
    padding: 8px;
    font-size: 16px;
}
button {
    background-color: #007BFF;
    color: white;
    border: none;
    cursor: pointer;
}
button:hover {
    background-color: #0056b3;
}
#resultados {
    margin-top: 20px;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}
th, td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: center;
}
th {
    background-color: #f2f2f2;
}
footer {
    text-align: center;
    padding: 10px;
    background-color: #f1f1f1;
}