#matrix-data {
    overflow: hidden;
}

.thumb-display {
    background-color: rgba(238, 238, 238, 0.64);
    box-shadow: 0 1px 4px 0 rgba(0, 0, 0, 0.14);
    border: 1px solid #ddd;
    margin-bottom: 30px;
    overflow: hidden;
}