:root {
  --black: #1a1a1a;
  --white: #fafafa;
  --grey: #5c5c5c;
  --line: #e2e2e2;
  --hover: #f0f0f0;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--white);
  color: var(--black);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 1.05rem;
  line-height: 1.7;
}

a {
  color: var(--black);
}

a:hover {
  color: var(--grey);
}

main {
  flex: 1;
  width: min(44rem, calc(100% - 3rem));
  margin: 0 auto;
  padding: 3rem 0 4.5rem;
}

h1 {
  margin: 0 0 0.75rem;
  color: var(--black);
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  font-weight: 650;
  line-height: 1.2;
}

.lead {
  margin-top: 0;
  color: var(--grey);
  font-size: 0.95rem;
}

h2 {
  margin: 2.4rem 0 0.75rem;
  color: var(--black);
  font-size: 1.05rem;
  font-weight: 650;
}

h3 {
  margin: 1.5rem 0 0.4rem;
  color: var(--black);
  font-size: 0.95rem;
  font-weight: 650;
}

p,
ul {
  margin: 0 0 1rem;
}

ul {
  padding-left: 1.15rem;
}

li + li {
  margin-top: 0.35rem;
}

.note {
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--black);
}

.site-footer {
  padding: 0 1.5rem 2.5rem;
  color: var(--grey);
  font-size: 0.82rem;
  text-align: center;
}

.site-footer p {
  margin: 0;
}

.doc-list {
  display: grid;
  gap: 0.6rem;
  padding: 0;
  list-style: none;
}

.doc-list a {
  display: block;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--black);
  text-decoration: none;
}

.doc-list a:hover {
  background: var(--hover);
  color: var(--black);
}