app.css

/* cheap reset */
*, *:before, *:after  {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    color:#001e3c;
}

a[scrollto]{
    cursor: pointer;
}

a[scrollto].top::before{
    content: "↑";
    transition: all 1s;
    position: relative;
    top:0;
}
a[scrollto].top:hover::before{
    animation:top .5s;
}
@keyframes top {
    100% {
        top: -.6rem;
    }
}

.disabled {
    cursor: not-allowed;
    pointer-events: none;
    opacity: .5;
}

property label {
    z-index: 1; /* hover gets lost in floats */
}
header {
    background: #222;
    width: 100%;
    padding: 1rem;
    position: relative;
    box-shadow: 0 0 3rem #001e3c;
    margin-bottom: 2rem;
}
header h1 {
    color:#a3d1ff;
    top: 3rem;
    letter-spacing: .75rem;
    position: relative;
}
header h1 span{
    color:#a3d1ff;
}
header small {
    position: absolute;
    bottom: 1rem;
    line-height: 1;
    margin-left: 17.3333%; /* match .column */
    color: #dfdfdf;
}
footer {
    position:fixed;
    bottom:0;
    width:100vw;
    overflow: hidden;
    padding: 1rem 0;
    background-color: #dfdfdf;
}
footer .button {
    border-color: transparent;
    margin:0;
}
footer .button:hover{
    background-color: #a3d1ff;
}
footer::before{
    content: "";
    position: absolute;
    box-shadow: 0 0 3rem #001e3c;
    height: 2rem;
    top: -2.5rem;
    width: 120%;
    left: -10%;
}
body {
    margin-top: 2rem;
    margin-bottom: 5rem;
}
body pre {
    -webkit-user-select: all;
    -moz-user-select: all;
    user-select: all;
}
.no-break {
    white-space: nowrap;
}
.text-center {
    text-align: center;
}
.columns,.column {
    position: relative;
}
.watermark::before {
    color: #a3d1ff;
    position: absolute;
    opacity: .5;
    font-size: 5rem;
    width: 100%;
    top: 0;
    left: 0;
    height: 100%;
    background-color: #f5faff;
    line-height: 3.5;
    z-index: -1;
}
.closeManifestPreview{
    position: absolute;
    right: 1rem;
    font-weight: bold;
    font-size: 3rem;
    top: 0;
    cursor: pointer;
}

figure img{
    max-height:300px;
}
.row {
    display: flex;
}
.nowrap {
    white-space: nowrap !important;
}

.note {
    position:relative;
    background-color: #fff;
    border: 1px solid #ddd;
    box-shadow: 0 1px 3px rgba(0,30,60,.12), 0 1px 2px rgba(0,30,60,.24);
    margin-bottom: 2.5rem;
}
.note>.note-header{
    color: #333;
    background-color: #f5f5f5;
    border-color: #ddd;
    padding: .6rem 1rem;
    border-bottom: 1px solid transparent;
}
.note>.note-block{
    padding: 1rem;
    font-family: monospace;
}
.note>.note-header:after,.note>.note-header:before{
    position:absolute;
    top:11px;left:-16px;
    right:100%;
    width:0;
    height:0;
    display:block;
    content:" ";
    border-color:transparent;
    border-style:solid solid outset;
    pointer-events:none;
}
.note>.note-header:after{
    border-width:7px;
    border-right-color:#f7f7f7;
    margin-top:1px;
    margin-left:2px;
}
.note>.note-header:before{
    border-right-color:#ddd;
    border-width:8px;
}
.note-footer{
    background-color: #f5f5f5;
    padding: .75rem 1.25rem;
    border-top: 1px solid rgba(0,0,0,.125);
    width:100%;
}
.text {
    font-family: 'Junicode', serif !important;
}
.card {
    margin-bottom: 2.5rem;
    padding: 1rem;
    box-shadow: 0 1px 3px rgba(0,30,60,.12), 0 1px 2px rgba(0,30,60,.24);
}
code{
    color: #001e3c;
    background-color: #d6ebff;
    border-color: #a3d1ff;
}
section>h2{
    position:relative;
    background-color: #f5f5f5;
}
section>h2::before{
    content:"";
    position:absolute;
    background-color: #f5f5f5;
    top:0;left:-5rem;
    border-bottom-left-radius: 5rem;
    border-top-left-radius: 5rem;
    height:100%;
    width:5rem;
}

dt {
    font-weight: 700;
    clear:left;
}
dd {
    margin-bottom: .5rem;
    margin-left: 2rem;
}

/* textareas that allow manifest alterations */
.editor{
    width: 800px;
    height: 500px;
    font-family: sans-serif;
}

#jsonManifestInput{
    width: 345px;
    height: 145px;
}

/* Validate CSS */
#validationChoices{

}

.validationChoice{
    float: none;
    margin: 0 auto;
}

.validationProcess{
    display: block;
    margin: 0 auto;
    position: relative;
}

.validationInput, .validationInputArea{
    width: 100%;
}

.validationInputArea{
    height: 300px;
}

.whichValidation{
    margin-right: 10px;
}

.validateUpload{
    margin-top: 50px;
}

.validateUpload::before{
    content:"or";
    position: relative;
    top: -23px;
    left: 50%;
}

.validationResponse{
    white-space: pre-line;
}

.rerum_shimmer {
    /* the shimmer magic */
    background: -webkit-gradient(linear,left top,right top,from(#fff),to(#fff),color-stop(.15,#000));
    background: -moz-gradient(linear,left top,right top,from(#fff),to(#fff),color-stop(.15,#000));
    background: gradient(linear,left top,right top,from(#fff),to(#fff),color-stop(.15,#000));
    -webkit-background-size: 55px 100%;
    -moz-background-size: 55px 100%;
    background-size:55px 100%;
    -webkit-background-clip: text;
    -moz-background-clip: text;
    background-clip: text;
    -webkit-animation-name: shimmer;
    -moz-animation-name: shimmer;
    -webkit-animation-name: shimmer;
    animation-name: shimmer;
    -webkit-animation-duration: 2.10s;
    -moz-animation-duration: 2.10s;
    -webkit-animation-duration: 2.10s;
    animation-duration: 2.10s;
    -webkit-animation-iteration-count: infinite;
    -moz-animation-iteration-count: infinite;
    -webkit-animation-iteration-count: infinite;
    animation-iteration-count: infinite;
    background-repeat: no-repeat;
    background-position: 0 0;
    background-color: #222;
}

@-moz-keyframes shimmer {
    0% {
        background-position: top left;
    }

    100% {
        background-position: top right;
    }
}

@-webkit-keyframes shimmer {
    0% {
        background-position: top left;
    }

    100% {
        background-position: top right;
    }
}

@-o-keyframes shimmer {
    0% {
        background-position: top left;
    }

    100% {
        background-position: top right;
    }
}

@-ms-keyframes shimmer {
    0% {
        background-position: top left;
    }

    100% {
        background-position: top right;
    }
}

@keyframes shimmer {
    0% {
        background-position: top left;
    }

    100% {
        background-position: top right;
    }
}

/* read viewer (moved from read.html scoped styles) */
img:not(.avatar) {
    width: 100%;
}

img#backsplash {
    position: fixed;
    width: 125vw;
    left: -12vw;
    top: -25vh;
    z-index: -1;
    filter: grayscale(1) contrast(1.5) brightness(2);
    opacity: 0;
    max-width: none;
    transition: 500ms all;
}

.annotation {
    opacity: 0;
    position: absolute;
    border: solid #3f3f3f medium;
    box-shadow: inset 0 0 3px black;
    transition: border-color 300ms ease, opacity 300ms ease;
    box-sizing: content-box;
}

.annotation::before {
    width: 100%;
    color: #8c8c8c;
    background: #3f3f3f;
    border: solid #3f3f3f medium;
    content: attr(data-uri);
    position: absolute;
    bottom: 100%;
    box-shadow: 2px 4px 15px rgba(0, 0, 0, .33);
    font-size: .75em;
}

.annotation::after {
    width: 100%;
    background: #dfdfdf;
    box-shadow: 2px 4px 15px rgba(0, 0, 0, .33);
    content: attr(data-content);
    position: absolute;
    top: 100%;
    margin-top: 3px;
    font-family: 'Junicode', serif;
}

.annotation:hover {
    opacity: 1;
}

.annotation.focused {
    opacity: 1;
    border-color: #31b0d5;
}

/* overlays are invisible until hovered, so focus has to reveal them */
.annotation:focus-visible {
    opacity: 1;
    outline: 2px solid #31b0d5;
    outline-offset: 2px;
}

.text-annotation:focus-visible {
    outline: 2px solid #31b0d5;
    outline-offset: 2px;
}

.copy-status {
    margin-left: .5rem;
    font-style: italic;
}

/* self-contained: the viewer is embedded in hosts that may not ship alert styles */
.alert {
    padding: .75rem 1.25rem;
    margin: 1rem 0;
    border: 1px solid transparent;
    border-radius: .25rem;
    font-size: 1rem;
}

.alert-danger {
    color: #843534;
    background-color: #f2dede;
    border-color: #ebccd1;
}

.text-annotation {
    font-size: 1.2rem;
    perspective: 900px;
    transition: background-color 300ms ease;
}

.text-annotation canvas, .text-annotation img {
    transition: 500ms all;
    transform-origin: top;
    box-shadow: rgba(0,0,0,1) 0px 0px 0px 0px;
    width: auto;
    max-width: 100%;
}

.text-annotation:hover {
    background-color: #cfcfcf;
}

.text-annotation:hover canvas, .text-annotation:hover img {
    transform: rotateX(100deg);
    box-shadow: rgba(0,0,0,.4) 0px 30px 5px -10px;
}

.text-annotation div:first-of-type {
    position: absolute;
    z-index: -1;
}

.text-annotation div:last-child, .block .text-annotation div {
    position: relative !important;
}

.block .text-annotation:hover canvas, .block .text-annotation:hover img {
    transform: none;
    box-shadow: inherit;
}

.text-annotation.focused {
    background-color: #d6ebff;
}

.u-see-thru {
    background-color: rgba(255,255,255,.7);
}

.btn-group, .btn-group-vertical {
    position: relative;
    display: -webkit-inline-box;
    display: -webkit-inline-flex;
    display: -ms-inline-flexbox;
    display: inline-flex;
    vertical-align: middle;
}

.btn-group>.btn:first-child:not(:last-child):not(.dropdown-toggle) {
    border-bottom-right-radius: 0;
    border-top-right-radius: 0;
}

.btn-group>.btn:first-child {
    margin-left: 0;
}

.btn-group>.btn {
    position: relative;
    -webkit-box-flex: 0;
    -webkit-flex: 0 1 auto;
    -ms-flex: 0 1 auto;
    flex: 0 1 auto;
}

.btn {
    display: inline-block;
    font-weight: 400;
    line-height: 1.25;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    border: 1px solid transparent;
    padding: .5rem 1rem;
    font-size: 1rem;
    border-radius: .25rem;
    -webkit-transition: all .2s ease-in-out;
    -o-transition: all .2s ease-in-out;
    transition: all .2s ease-in-out;
}

[data-toggle=buttons]>.btn input[type=checkbox], [data-toggle=buttons]>.btn input[type=radio], [data-toggle=buttons]>.btn-group>.btn input[type=checkbox], [data-toggle=buttons]>.btn-group>.btn input[type=radio] {
    position: absolute;
    clip: rect(0,0,0,0);
    pointer-events: none;
}

.btn-info.active, .btn-info:active, .show>.btn-info.dropdown-toggle {
    color: #fff;
    background-color: #31b0d5;
    background-image: none;
    border-color: #2aabd2;
}

.btn-info {
    color: #fff;
    background-color: #5bc0de;
    border-color: #5bc0de;
}

.btn-info:hover {
    color: #fff;
    background-color: #31b0d5;
    border-color: #2aabd2;
}

button:disabled {
    opacity: .5;
    cursor: not-allowed;
}

/* special case CSS to test injecting stylesheets */
em[decoration='double-underline'] {
    font-style: normal;
    text-decoration: underline;
    text-decoration-style: double;
}

em[decoration='underline'] {
    font-style: normal;
    text-decoration: underline;
}

monogram {
    font-family: cursive;
    padding: .25rem;
    border: solid 3px;
    margin: -.25rem;
}

monogram[shape='oval'] {
    border-radius: 50%;
}

/* LDN panel */
.ldn-panel {
    border-left: 4px solid #5bc0de;
}

.ldn-annotation {
    outline: 2px dashed #5bc0de;
    outline-offset: 2px;
}

.ldn-result {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: .25rem 0;
    border-bottom: 1px solid #eee;
}

/* modals */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 30, 60, .5);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal {
    background: #fff;
    border-radius: .25rem;
    box-shadow: 0 1px 3px rgba(0,30,60,.12), 0 1px 2px rgba(0,30,60,.24);
    padding: 1.5rem;
    max-width: 40rem;
    width: 90%;
    max-height: 90vh;
    overflow: auto;
}

.modal h3 {
    margin-bottom: 1rem;
}

.modal h4 {
    margin: 1rem 0 .5rem;
}

.modal label {
    display: block;
    margin-bottom: 1rem;
}

.share-option {
    margin-bottom: 1rem;
}

.share-option input {
    width: 100%;
    margin-bottom: .5rem;
}

.share-option small {
    display: block;
    margin-top: .25rem;
}

.inbox-list {
    list-style: none;
    margin-bottom: 1rem;
}

.inbox-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: .25rem 0;
}

.region-view {
    position: relative;
}

.region-canvas, .crop-canvas {
    max-width: 100%;
}