:root {
  --color-fg: #333;
  --color-bg: #f2f2f2;
  --color-tab-border: #bbb;
  --color-tab-bg: #d6d6d6;
  --color-tab-fg: #555;
  --color-link: #f05a24;
}
body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  color: var(--color-fg);
  background-color: var(--color-bg);
}
header,
main {
  display: flex;
  justify-content: center;
}
header {
  background-color: white;
  padding: 20px 20px 0 20px;
  border-bottom: 1px solid var(--color-tab-border);
}
main {
  padding: 20px;
}
.content {
  width: 1075px;
}
h2 {
  padding: 0 0 20px 0;
  margin: 0;
}
a {
  text-decoration: none;
  color: var(--color-link);
}
.tabs {
  color: var(--color-tab-fg);
}
.tabs a {
  color: var(--color-tab-fg);
  padding: 10px 18px;
  border-radius: 4px 4px 0 0;
  margin: 0 4px 0 0;
  border: 1px solid var(--color-tab-border);
  border-bottom: none;
  display: inline-block;
  font-weight: bold;
  background-color: var(--color-tab-bg);
}
.tabs .selected {
  background-color: var(--color-bg);
  transform: translateY(1px);
}
#ChartTitle {
  margin-top: 20px;
}
svg {
  /* draw border for debugging */
  /* border: 1px solid cyan; */
}