.sheet {
  max-width: var(--sheet-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  background: var(--paper);
  min-height: 100vh;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 56px;
  margin: 0 calc(var(--gutter) * -1);
  padding: 0 var(--gutter);
  border-bottom: 1px solid var(--ink);
  background: var(--paper);
}

.site-header__mark {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  border: 1.5px solid var(--ink);
  padding: 2px 6px;
}

.site-nav {
  display: flex;
  gap: 20px;
  overflow-x: auto;
}

.site-nav a {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}

.site-nav a span {
  margin-right: 6px;
  color: var(--ink-muted);
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--accent);
}

.intro {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--line);
}

.intro__name {
  margin: 12px 0 20px;
  font-size: clamp(48px, 10vw, 96px);
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.intro__statement {
  max-width: 34em;
  margin-bottom: 40px;
  font-size: 20px;
}

.section {
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}

.section:last-child {
  border-bottom: none;
}

.section__header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 32px;
}

.section__number {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
}

.section__title {
  font-size: 28px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 0 calc(var(--gutter) * -1);
  padding: 16px var(--gutter);
  border-top: 1px solid var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
}

@media (min-width: 720px) {
  :root {
    --gutter: 40px;
  }
}

@media (max-width: 560px) {
  .site-header__mark,
  .site-nav a span {
    display: none;
  }

  .site-nav {
    flex: 1;
    justify-content: space-between;
    gap: 10px;
  }

  .site-nav a {
    font-size: 12px;
  }
}