.ddb-container {
    text-align: center;
    max-width: 500px;
    margin: 20px auto;
}

.ddb-progress {
    width: 100%;
    height: 6px;
    background: #ddd;
    margin: 10px 0;
    border-radius: 10px;
    overflow: hidden;
}

.ddb-bar {
    height: 100%;
    width: 0%;
    background: #2d7ff9;
    transition: width 1s linear;
}

.ddb-btn {
    background: #2d7ff9;
    color: #fff;
    border: none;
    padding: 12px 20px;
    border-radius: 6px;
    cursor: pointer;
}