.site-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: var(--split-left) minmax(0, 1fr);
  min-height: 100dvh;
}

.sidebar {
  position: sticky;
  top: 0;
  isolation: isolate;
  display: flex;
  flex-direction: column;
  height: 100dvh;
  /* 위쪽 여백은 화면 크기와 관리자 바 유무에 따라 달라져 변수로 둔다 */
  --sidebar-pad-top: 28px;
  padding: var(--sidebar-pad-top) clamp(24px, 3.2vw, 52px) 30px;
  overflow: auto;
  color: var(--sidebar-ink);
  background: transparent;
  border-right: 1px solid rgba(232, 230, 222, .18);
}

.sidebar::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: var(--sidebar-wash);
}

.sidebar::after,
.content::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: var(--grain-opacity);
  background-image: var(--grain-texture);
  background-repeat: repeat;
  background-size: var(--grain-size);
  background-position: var(--grain-position);
  background-attachment: fixed;
}

.sidebar > * {
  position: relative;
  z-index: 1;
}

.sidebar-topline,
.sidebar-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--fs-micro);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.mini-mark {
  transition: opacity .2s ease;
}

.mini-mark:hover {
  opacity: .55;
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 0;
  text-transform: uppercase;
  letter-spacing: .14em;
  background: none;
  border: 0;
  cursor: pointer;
}

.wordmark {
  display: inline-flex;
  align-self: flex-start;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin: clamp(52px, 8vh, 92px) 0 0;
  color: var(--sidebar-ink);
}

.wordmark-image {
  display: block;
  width: min(100%, 416px);
  aspect-ratio: 948 / 298;
  background: currentColor;
  -webkit-mask: url("../images/logo-mask.png") center / contain no-repeat;
  mask: url("../images/logo-mask.png") center / contain no-repeat;
}

.site-nav {
  width: 100%;
  margin-top: auto;
  border-top: 1px solid var(--sidebar-line);
}

.nav-group {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  height: 64px;
  padding: 8px 0;
  border-bottom: 1px solid var(--sidebar-line);
}

.nav-main {
  display: grid;
  flex: 0 0 auto;
  grid-template-columns: 32px auto;
  align-items: baseline;
  font-family: var(--font-display);
  font-size: var(--fs-base);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -.025em;
  text-transform: none;
  transition: color .2s ease, transform .25s var(--ease);
}

.nav-main:hover,
.nav-group.is-active .nav-main {
  transform: translateX(8px);
}

.nav-group.is-active .nav-main {
  font-weight: 400;
}

.nav-index {
  font-family: var(--font-body);
  font-size: var(--fs-micro);
  font-weight: 700;
  letter-spacing: .08em;
}

.nav-children {
  display: flex;
  flex: 1 1 auto;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px 12px;
  margin: 0;
  font-size: var(--fs-micro);
  font-weight: 650;
  line-height: 1.25;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.nav-children a {
  color: var(--sidebar-soft);
}

.nav-children a:hover,
.nav-children a.is-current {
  color: var(--sidebar-ink);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.sidebar-foot {
  margin-top: 32px;
  color: var(--sidebar-soft);
  font-size: var(--fs-micro);
}

.content {
  position: relative;
  isolation: isolate;
  min-width: 0;
  min-height: 100dvh;
  padding: clamp(38px, 5vw, 76px) var(--content-pad) 34px;
  font-size: var(--fs-base);
  background: var(--content-wash);
}

.content > * {
  position: relative;
  z-index: 1;
}

.page-header {
  display: grid;
  grid-template-columns: minmax(90px, .3fr) 1fr;
  column-gap: clamp(22px, 4vw, 68px);
  padding-bottom: clamp(54px, 9vw, 128px);
  border-top: 1px solid var(--line-strong);
}

.eyebrow {
  margin: 13px 0 0;
  font-size: var(--fs-micro);
  font-weight: 750;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.page-header h1 {
  /* 줄간(line-height)이 1보다 작으면 글자가 상자 위로 삐져나온다.
     그만큼을 padding 으로 되돌려, 왼쪽 작은 라벨의 글자 윗선과 나란히 시작하게 한다. */
  --title-lh: 1.06;
  grid-column: 2;
  max-width: calc(950px * var(--measure));
  margin: 15px 0 0;
  padding-top: calc((1.15 - var(--title-lh)) / 2 * 1em);
  font-family: var(--font-display);
  font-size: var(--fs-display);
  font-weight: 500;
  line-height: var(--title-lh);
  letter-spacing: -.065em;
  text-wrap: balance;
}

.page-header h1.page-title--long {
  --title-lh: 1.1;
  font-size: var(--fs-display-long);
  letter-spacing: -.05em;
}

.page-header h1.page-title--very-long {
  --title-lh: 1.14;
  font-size: var(--fs-display-xl);
  letter-spacing: -.04em;
}

.page-intro {
  grid-column: 2;
  max-width: calc(660px * var(--measure));
  margin: 40px 0 0;
  font-size: var(--fs-base);
  font-weight: 560;
  line-height: 1.8;
  word-break: keep-all;
}

.content-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: clamp(80px, 13vw, 180px);
  padding-top: 14px;
  font-size: var(--fs-micro);
  font-weight: 700;
  letter-spacing: .12em;
  border-top: 1px solid var(--line-strong);
}