html {
  box-sizing: border-box;
  font-family: sans-serif;
  line-height: 1.15;
  font-size: 14px;
}
body {
  margin: 0;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}
body > header {
  height: 30px;
  padding: 10px;
  background-color: white;
  box-shadow: 0 1px 4px 0 rgba(0, 0, 0, 0.2);
  z-index: 10;
  position: relative;
}
body > header input[type=search] {
  padding: 5px 10px;
  border-radius: 100px;
  border: 1px solid #e6e6e6;
  width: 250px;
}
main {
  height: calc(100vh - 50px);
  overflow-y: auto;
}
section {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: flex-start;
}
.content > * {
  margin: 20px 0;
}
.text {
  max-width: 100%;
  white-space: pre-wrap;
  word-break: break-word;
}
.row {
  display: flex;
}
.row.space {
  justify-content: center;
}
.stretch {
  flex: 1;
}
a[target=_blank]::after {
  content: '→';
}
.center {
  text-align: center;
}
img {
  max-width: 100%;
}
.contain {
  object-fit: contain;
  background: #f2f2f2;
  margin-right: 20px;
}
button {
  background-color: white;
  padding: 6px 20px;
  line-height: 10px;
  border: 3px solid #f2f2f2;
  text-transform: uppercase;
  transition: all .2s;
}
button:active {
  background-color: #f2f2f2;
}
.sticky {
  position: sticky;
  top: 0;
  z-index: 1;
}
.sticky time {
  background-color: white;
  padding: 0 20px;
}
[hidden] {
  display: none;
}