h1 {
    font-family: Open Sans, Arial, serif;
    font-size: 3em;
    text-align: center;
    line-height: 1.2;
    color: black;
    padding: 1%;
}

#gallery {
    -webkit-column-count: 4;
    -moz-column-count: 4;
    column-count: 4;
    padding: 0 5em 0;

    -webkit-column-gap: 20px;
    -moz-column-gap: 20px;
    column-gap: 20px;
}

.locked {
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
    pointer-events: none;
}

@media (max-width: 1200px) {
    #gallery {
        -webkit-column-count: 3;
        -moz-column-count: 3;
        column-count: 3;

        -webkit-column-gap: 20px;
        -moz-column-gap: 20px;
        column-gap: 20px;
    }
}

@media (max-width: 800px) {
    #gallery {
        -webkit-column-count: 2;
        -moz-column-count: 2;
        column-count: 2;

        -webkit-column-gap: 20px;
        -moz-column-gap: 20px;
        column-gap: 20px;
    }
}

@media (max-width: 600px) {
    #gallery {
        -webkit-column-count: 1;
        -moz-column-count: 1;
        column-count: 1;
    }
}

#gallery img, #gallery video {
    width: 100%;
    height: auto;
    margin: 4% auto;
    box-shadow: -3px 5px 15px #000;
    cursor: pointer;
    -webkit-transition: all 0.2s;
    transition: all 0.2s;
}

.modal-img, .model-vid {
    width: 100%;
    height: auto;
}

.modal-body {
    padding: 0;
}

.sl-image {
    box-shadow: -3px 5px 15px #000;
}

.sl-next, .sl-prev {
    min-width: 5em;
    min-height: 100px;
}