.base64-img-container {
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    margin-bottom: 40px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.base64-title {
    font-size: 2rem;
    font-weight: bold;
    color: #212529;
    margin-bottom: 1.5rem;
    text-align: center;
}

.base64-btn {
    background-color: #1abc9c;
    color: #fff;
    border: none;
    padding: 10px 25px;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

    .base64-btn:hover {
        background-color: #16a085;
    }

.form-row {
    margin-bottom: 20px;
    text-align: center;
}

.result-container {
    text-align: center;
    margin-top: 20px;
}

.img-preview {
    max-width: 100%;
    margin-bottom: 15px;
    border: 1px solid #dee2e6;
    padding: 4px;
    border-radius: 4px;
}