:root {
  --color-accent: #1e5f74;
  --color-lightgray: #f0f0f0;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

.container {
  padding: 0 0.5rem;
}

main {
  max-width: 800px;
  margin: 0 auto;
  font-family: 'IBM Plex Sans', Arial, sans-serif;
}

h3 {
  margin: 0;
}

.row {
  display: flex;
  gap: 1rem;
}
.row--spread {
  justify-content: space-between;
}
.row__expand {
  flex-grow: 1;
}

.sidebar {
  max-width: 300px;
}

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

button {
  cursor: pointer;
  border: none;
  color: var(--color-accent);
  font: inherit;
}
button.primary {
  background: var(--color-lightgray);
  border-radius: 4px;
  display: block;
  margin-bottom: 0.5rem;
  padding: 0.25rem 0.5rem;
}
button.secondary {
  font-size: 0.8rem;
  background: none;
  padding: 0;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

hr {
  border: none;
  border-top: 1px solid #ccc;
  margin: 1rem 0;
}

.plot {
  margin-bottom: 1rem;
}

path.shape {
  stroke-width: 0.5;
  stroke: black;
  fill: none;
}
line.construction {
  stroke: dodgerblue;
  stroke-width: 0.5;
  stroke-dasharray: 2 2;
}
circle.construction {
  cursor: grab;
  stroke: white;
  stroke-width: 0.25;
  fill: dodgerblue;
}