cleanup

span[id^="thumb"] {
    float: left;
    margin: 2px 20px;
}

.thumb[src*="/src/"] {
    max-width: 100%;
    max-height: unset;
    height: auto;
}

@media only screen and (max-width: 480px) {
    span[id^="thumb"] {
        margin: 2px 4px;
    }
}