:root {
  color-scheme: light dark;
  font-family: system-ui, sans-serif;
  line-height: 1.55;
}

body {
  margin: 0 auto;
  max-width: 72rem;
  padding: 2rem;
}

.site-header {
  border-bottom: 1px solid #9a9a9a;
  margin-bottom: 2rem;
}

.eyebrow {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .08em;
  margin: 0;
  text-transform: uppercase;
}

.reader {
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(14rem, 18rem) minmax(0, 1fr);
}

nav {
  border-right: 1px solid #9a9a9a;
  padding-right: 1.5rem;
}

input {
  box-sizing: border-box;
  margin: .4rem 0;
  padding: .45rem;
  width: 100%;
}

#lesson-list {
  margin: .75rem 0;
  padding-left: 1.4rem;
}

#lesson-list li {
  margin: .4rem 0;
}

a {
  color: #1769aa;
}

#lesson-list a[aria-current="page"] {
  font-weight: 700;
}

table {
  border-collapse: collapse;
  display: block;
  max-width: 100%;
  overflow-x: auto;
}

th, td {
  border: 1px solid #999;
  padding: .35rem .55rem;
  text-align: left;
}

.source-toggle {
  display: flex;
  gap: .4rem;
  margin-bottom: .75rem;
}

.source-btn {
  background: none;
  border: 1px solid #9a9a9a;
  border-radius: .25rem;
  cursor: pointer;
  flex: 1;
  font-size: .85rem;
  padding: .35rem .5rem;
}

.source-btn.active {
  background: #1769aa;
  border-color: #1769aa;
  color: #fff;
  font-weight: 700;
}

.lesson-toolbar {
  display: flex;
  gap: .75rem;
  margin-bottom: 1.25rem;
}

.toolbar-btn {
  border: 1px solid #9a9a9a;
  border-radius: .25rem;
  font-size: .85rem;
  padding: .3rem .65rem;
  text-decoration: none;
  white-space: nowrap;
}

.toolbar-btn:hover {
  background: #f0f0f0;
}

.toolbar-btn--report {
  border-color: #c0392b;
  color: #c0392b;
}

.toolbar-btn--report:hover {
  background: #fdf0ef;
}

  body { padding: 1rem; }
  .reader { display: block; }
  nav {
    border-bottom: 1px solid #9a9a9a;
    border-right: 0;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    padding-right: 0;
  }
}