.ttb-base64-container {
    max-width: 700px;
    margin: 0 auto;
    padding: 20px;
    background: #ffffff;
    border: 2px solid #ddd;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    font-family: 'Segoe UI', sans-serif;
    text-align: center;
}

.ttb-base64-container textarea {
    width: 100%;
    height: 180px;
    padding: 12px;
    font-family: monospace;
    font-size: 14px;
    border: 2px dashed #bbb;
    border-radius: 12px;
    background-color: #f8f8f8;
    resize: vertical;
}

.ttb-base64-buttons {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 20px;
}

.ttb-base64-buttons button {
    padding: 10px 16px;
    font-size: 14px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.ttb-base64-buttons button:hover {
    background-color: #0056b3;
}

.ttb-error {
    color: red;
    font-weight: bold;
}

.ttb-base64-info ul { margin: 0; }
.ttb-base64-info li { list-style: none; }