main {
    flex: 1;
    padding: 6.25rem 1.25rem 1.25rem 1.25rem;
    text-align: center;
    box-sizing: border-box;
}

.container {
    max-width: 31.25rem;
    margin: 1.25rem auto;
    padding: 1.25rem;
    border-radius: 0.5rem;
    background: rgba(255, 255, 255, 0.5);
    box-shadow: 0 0 0.625rem rgba(0, 0, 0, 0.1);
}

h2 {
    text-align: center;
}

label {
    display: block;
    margin-top: 0.625rem;
}

.container > select, .container > button {
    width: 100%;
    margin-top: 0.3125rem;
    padding: 0.5rem;
}

textarea {
    width: 99%;
    height: 4rem;
    margin: 0.625rem 0;
    resize: none;
}

#aesKey {
    width: 72.5%;
    height: 2rem;
    margin: 0.625rem 0;
    resize: none;
}

.button-container {
    display: flex;
    justify-content: center;
}

.button-container > button {
    width: 30%;
    padding: 0.625rem 1.25rem;
    margin-top: 1.25rem;
    background-color: #007bff;
    color: white;
    border: none;
    cursor: pointer;
}

.button-container > button:hover {
    background-color: #0056b3;
}

#aesKeyContainer > button {
    width: 25%;
    padding: 0.625rem 1.25rem;
    margin-top: 1.25rem;
    background-color: #007bff;
    color: white;
    border: none;
    cursor: pointer;
}

#aesKeyContainer > button:hover {
    background-color: #0056b3;
}