* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, sans-serif;
  color: black;
  background-color: white;
}

header {
  align-items: center;
  background-color: #fff;
  border-bottom: 1px solid rgb(220, 220, 220);
  display: grid;
  grid-template-columns: 100px 1rem 1fr;
  grid-template-rows: 1fr;
  gap: 0px 0px;
  grid-template-areas: "symbol . title";
  margin: 1rem 0;
  padding: 0 0.5rem 0 0;
}

.header-symbol {
  grid-area: symbol;
  padding-left: 0.5rem;
}

.header-title {
  grid-area: title;
}

main {
  padding: 0 1rem 1rem;
}

h1 {
  font-weight: bold;
  font-size: 1.5rem;
}

.date-now-label,
.date-then-label {
  display: inline-block;
  min-width: 9em;
}

#set-output {
  margin: 0 1em 0 0;
}

.footer {
  font-size: small;
  margin: 1rem 0 0.5rem 1rem;
}