* {
  box-sizing: border-box;
  -moz-box-sizing: border-box;
  font-family: 'Courier New', Courier, monospace;
}


:root {
  --text: #fff;
  --bg: #fff;
  --highlight: #fff;
}

input,
textarea,
button,
select,
a {
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

figure {
  margin:0;
}

html, body {
  height:100%;
  margin:0;
  color:rgb(77, 77, 86);
  overflow: hidden;
}

img {
  max-width:100%;
  vertical-align: top;
}

iframe {
  height:100vh;
  width:100%;
}

.left {
  margin: 1rem 1rem 1rem 0;
  float:left;
}

.right {
  margin: 1rem 0 1rem 1rem;
  float:right;
}

pre br {
  display:none;
}

.serif {
  font-family: 'Times New Roman', Times, serif;
  
}

.sans {
  font-family: Helvetica, Arial, sans-serif
}

.col {
  /* padding:1rem; */
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-color: #f7f7f7 transparent;
  scrollbar-width: 2px;
  height:100vh;
  width:100%;
}

.split {
  display: flex;
  flex-direction: row;
  max-width:100%;
  height:100%;
  overflow: hidden;
}

.gutter.gutter-horizontal {
  cursor: col-resize;
}

.col-lines .gutter.gutter-horizontal {
  border-left:1px solid;
}

pre {
  margin:0;
  padding:0;
  
  white-space: pre-wrap;
  white-space: -moz-pre-wrap;
  white-space: -pre-wrap;
  white-space: -o-pre-wrap;
  word-wrap: break-word;

  background-size: 100% 100%;
}

.l-t {
  text-align: left;
}

.r-t {
  text-align: right;
}

::-webkit-scrollbar {
  width:1px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: #f7f7f7;
  background: transparent;
}

::-webkit-scrollbar-thumb:hover {
  background: #e0e0e0;
  background: transparent;
}

::-webkit-scrollbar {
  display: none;
}

.col {
  -ms-overflow-style: none;  /* IE and Edge */
  scrollbar-width: none;  /* Firefox */
}

img.center {
  text-align: center;
  display:block;
  margin:0 auto;
  margin-bottom:-1.1rem;
}

img.right {
  text-align: center;
  display:block;
  margin:0 0 0 auto;
}

img.left {
  text-align: center;
  display:block;
  margin:0 auto 0 0;
}

.video-container {
  overflow: hidden;
  position: relative;
}

.video-container::after {
  padding-top: 56.25%;
  display: block;
  content: '';
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}