.base64-layout {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

@media (min-width: 800px) {
    .base64-layout {
        flex-direction: row;
        align-items: stretch;
    }
    .input-area, .output-area {
        flex: 1;
        display: flex;
        flex-direction: column;
    }
}

textarea {
    width: 100%;
    min-height: 200px;
    flex-grow: 1;
    padding: var(--spacing-md);
    font-family: "Courier New", Courier, monospace;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    resize: vertical;
    background-color: var(--color-light-gray);
    color: var(--color-text);
    margin-top: var(--spacing-sm);
}