/* Viewer sections */

.viewer-sections {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  background: black;
  color: white;
  display: block;
  transition: transform 0.2s;
  transform: translateZ(0) translateY(25rem);
  border-top: 1px solid #fff;
}
.nav-open .viewer-sections {
  transform: translateZ(0) translateY(0);
}
.checklist-open .viewer-sections {
  transform: translateZ(0) translateY(calc(3rem - 100vh));
  z-index: 20;
}

/* scrolling part */

.viewer-sections .viewer-sections-scroll {
  width: 100%;
  height: 22rem;
  white-space: nowrap;
  overflow-x: scroll;
  overflow-y: hidden;
}
.viewer-sections-scroll::-webkit-scrollbar {
  cursor: pointer;
  user-select: none;
  height: 4px;
  width: 4px;
}
.viewer-sections-scroll::-webkit-scrollbar-button {
  display: block;
  width: 0;
  height: 0;
}
.viewer-sections-scroll::-webkit-scrollbar-track-piece {
  background: rgba(211,211,211,0.8);
}
.viewer-sections-scroll::-webkit-scrollbar-thumb {
  display: block;
  background: #000;
}


/* clickable section indicators */

.viewer-sections .viewer-section {
  display: inline-flex;
  white-space: normal;
  width: 12rem;
  margin: 1rem 0 1rem 1rem;
  font-size: 16px;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity 0.2s;
}
.viewer-sections .viewer-section:hover {
  opacity: 1.0;
}
.viewer-sections .viewer-section.current-section {
  opacity: 1.0;
}
.viewer-sections .viewer-section:last-child {
  margin-right: 1rem;
}
.viewer-section > div {
  height: calc(20rem - 4px);
  width: 12rem;
}
.viewer-section .section-thumbnail {
  display: block;
  border-radius: 1rem;
  width: 12rem;
  height: 8rem;
  margin-bottom: 0.5rem;
  background-size: cover;
  background-position: center center;
  position: relative;
  overflow: hidden;
}
.viewer-section .section-duration {
  position: absolute;
  bottom: 0.5rem;
  left: 0.5rem;
  font-size: 0.75rem;
} 
.section-duration-white { color: white; }
.section-duration-black { color: black; }
.section-duration-white svg path { fill: white; }
.section-duration-black svg path { fill: black; }
.viewer-section .section-media {
  margin-top: 0.75rem;
  font-size: 12px;
}
.viewer-section .section-has-audio {
  position: absolute;
  bottom: -0.25rem;
  right: 0.25rem;
}
.viewer-section .section-has-audio svg {
  width: 2.5rem;
  height: 2.5rem;
}
.viewer-section .section-progress-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: #333;
}
.viewer-section .section-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  background: #fff;
}