:root {
  color-scheme: light;
  --paper: #f1efe6;
  --ink: #111816;
  --muted: #6d746f;
  --line: rgba(17, 24, 22, .18);
  --accent: #2864dc;
}

* { box-sizing: border-box; }
html { background: var(--paper); }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
main {
  width: min(calc(100% - 48px), 920px);
  margin-inline: auto;
  padding: clamp(56px, 9vw, 110px) 0;
}
h1 {
  margin: 0 0 clamp(38px, 6vw, 72px);
  font-size: clamp(42px, 7vw, 78px);
  line-height: .95;
  letter-spacing: -.055em;
}
.lesson-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.lesson-list li {
  min-height: 70px;
  padding: 18px 0;
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 18px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  font-size: clamp(17px, 2.2vw, 23px);
  line-height: 1.35;
}
.lesson-list span {
  color: var(--accent);
  font: 750 12px ui-monospace, Consolas, monospace;
  letter-spacing: .08em;
}

@media (max-width: 600px) {
  main { width: min(calc(100% - 28px), 920px); padding-block: 42px; }
  h1 { margin-bottom: 34px; font-size: 42px; }
  .lesson-list li { min-height: 62px; grid-template-columns: 42px 1fr; gap: 10px; font-size: 17px; }
}