.wstl-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin: 30px 0;
    align-items: stretch;
    background: #fff;
    border: 1px solid #e1e1e1;
    padding: 15px;
    border-radius: 8px;
}

.wstl-column {
    flex: 1;
    min-width: 300px; /* Stacks on mobile */
    position: relative;
    border: 1px solid #eee;
    border-radius: 4px;
    overflow: hidden;
}

.wstl-image img {
    width: 100%;
    height: auto;
    display: block;
}

.wstl-viewer {
    height: 400px; /* Fixed height for viewer */
    background: #f5f5f5;
    position: relative;
    cursor: grab;
}

.wstl-viewer:active {
    cursor: grabbing;
}

.wstl-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: bold;
    color: #888;
}

.wstl-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0,0,0,0.6);
    color: #fff;
    padding: 8px;
    text-align: center;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}