:root {
  color-scheme: dark;
  font-family: "Noto Sans KR", "Malgun Gothic", system-ui, sans-serif;
  background: #101010;
  color: #f4f4f5;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #101010;
}

header,
main,
footer {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  border-bottom: 1px solid #27272a;
}

a {
  color: #38bdf8;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 16px;
  font-size: 14px;
}

main {
  padding: 42px 0 64px;
}

h1 {
  max-width: 760px;
  margin: 0 0 18px;
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.18;
  letter-spacing: 0;
}

h2 {
  margin: 38px 0 12px;
  font-size: 24px;
}

p,
li {
  color: #c4c4cc;
  line-height: 1.85;
}

.lead {
  max-width: 760px;
  color: #d4d4d8;
  font-size: 18px;
}

.panel {
  margin: 28px 0;
  padding: 22px;
  border: 1px solid #333337;
  border-radius: 6px;
  background: #18181b;
}

.formula {
  overflow-x: auto;
  padding: 16px;
  border-radius: 6px;
  background: #0f172a;
  color: #e0f2fe;
  font-weight: 800;
  white-space: nowrap;
}

footer {
  padding: 28px 0 48px;
  border-top: 1px solid #27272a;
  color: #a1a1aa;
}