body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  }
  
h1 {
    text-align: center;
}

.container {
    margin: 20px auto;
    width: 500px;
}

.form-group {
    margin-bottom: 10px;
}

label {
    display: block;
    margin-bottom: 5px;
}

input {
    padding: 10px;
    width: 100%;
    border: 1px solid #ccc;
}

.buttons {
    margin-top: 10px;
    text-align: center;
}

button {
    padding: 10px;
    margin: 5px;
    font-size: 16px;
    cursor: pointer;
}

.resultado {
    margin-top: 20px;
}

#texto-cifrado, #texto-descifrado {
    font-weight: bold;
}