#preview {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  scrollbar-width: none;
  z-index: 5;
}

#preview-view {
  position: relative;
  width: 100%;
  height: 100vh;
}

#preview.offset #preview-view,
#preview.offset #nav-controls {
  margin-right: clamp(250px, 30vw, 400px);
}

#sidebar {
  position: absolute;
  top: 0;
  right: 0;
  width: clamp(250px, 30vw, 400px);
  height: 100vh;
  background-color: rgba(40, 40, 40);
  color: white;
  overflow-x: hidden;
  transform: translateX(100%);
  scrollbar-gutter: stable;
  scrollbar-width: thin;
}

#sidebar.open {
  transform: translateX(0);
}

@media (max-width: 640px) {
  #sidebar {
    width: 100vw;
    transition: none;
  }
  #preview.offset #nav-controls {
    display: none;
  }
}

@media (min-width: 640px) {
  #sidebar {
    transition: transform .3s ease-out;
  }

  #preview-view,
  #nav-controls {
    transition: margin-right .3s ease-out;
  }
}

#sidebar-content {
  padding: 4em 1em 4em 1.5em;
  box-sizing: border-box;
  min-width: 250px;
  line-break: anywhere;
}

#sidebar-content a {
  color: aquamarine;
  text-decoration: none;
  font-size: .8em;
  margin: 0 .5em 0 0;
}

#sidebar-content a:hover {
  color: rgb(60, 190, 150);
  text-decoration: none;
}

#sidebar-content span::before, #sidebar-content #img-id {
  display: block;
  color: #aaa;
  font-size: .8em;
}

#sidebar-content span::after {
  content: "";
  display: block;
  margin: 0 0 1.2rem 0;
}

#sidebar-content p {
  margin: 0;
  color: white;

  -webkit-user-select: text;
  -ms-user-select: text;
  user-select: text;
}

#preview-header {
  position: absolute;
  z-index: 10;
  top: 0;
  gap: 2em;
  height: 4em;
  width: 100%;
  color: white;
  fill: white;
  box-sizing: border-box;
  padding: .5em;
  display: flex;
  justify-content: space-between;
  background-image: linear-gradient(to top, transparent, hsla(0, 0%, 0%, 0.5));
  align-items: center;
}

#image-info {
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 35vw;
}

#image-info * {
  height: 1.6em;
  white-space: nowrap;
  margin-left: .8em;
}

#image-index {
  font-weight: bold;
}

#controls {
  display: flex;
}

#controls button {
  min-width: 1.6rem;
  min-height: 1.6rem;
  padding: .5em;
  border-radius: 50%;
  background: none;
  color: white;
  fill: currentColor;
  border: none;
  box-sizing: content-box;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.1s ease-out;
}

#controls button:hover {
  background-color: rgba(105, 105, 105, 0.5);
}

#controls svg {
  width: 24px;
  height: 24px;
}

#image-wrapper {
  display: flex;
  width: 100%;
  height: 100%;
  justify-content: center;
  align-items: center;

  cursor: grab;
}

#preview-img {
  width: min(90%, 90svw);
  height: min(90%, 90svh);
  object-fit: contain;

  transform-origin: center center;
  pointer-events: none;
}

#nav-controls {
  position: absolute;
  bottom: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  box-sizing: border-box;
  z-index: 1;
  pointer-events: none;
}

#nav-controls span {
  width: 10vw;
  height: 100vh;
  font-size: 24px;
  font-weight: bold;
  color: grey;
  background: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

#next-btn:hover {
  background-image: linear-gradient(to right, transparent, rgba(0, 0, 0, 0.5));
}

#prev-btn:hover {
  background-image: linear-gradient(to left, transparent, rgba(0, 0, 0, 0.5));
}

#img-artwork::before { content: "作品链接" }
#img-author::before { content: "作者" }
#img-source::before { content: "来源" }
#img-tag::before { content: "标签" }
#img-info::before { content: "图片信息" }

#img-source > div, #img-author > p {
  margin: 0 0 .5em 0;
}

#img-tag a, #img-info a {
  white-space: pre;
}

.desc, .time {
  font-size: .8em;
}