:root {
  --public-header-height: 68px;
  --public-header-max: 1180px;
  --public-header-gutter: 24px;
  --workspace-topbar-height: 58px;
  --workspace-rail-width: 240px;
  --workspace-inset: 32px;
}

/* Public surface */
.site-header {
  width: min(
    calc(100% - (var(--public-header-gutter) * 2)),
    var(--public-header-max)
  );
  min-height: var(--public-header-height);
  height: auto;
  margin-inline: auto;
  padding-inline: 0;
  align-items: center;
  gap: 24px;
}

.site-header :is(.brand, .wordmark) {
  flex: 0 0 auto;
  gap: 10px;
  font-size: 19px;
  line-height: 1;
}

.site-header :is(.brand-mark, .wordmark-mark) {
  width: 30px;
  height: 24px;
  flex: 0 0 30px;
}

.site-header :is(.site-nav, .public-nav) {
  display: flex;
  min-width: 0;
  align-items: center;
  flex-wrap: nowrap;
  gap: 24px;
  font-size: 14px;
}

.site-header :is(.site-nav, .public-nav) a {
  white-space: nowrap;
}

/* Workspace surface */
.workspace-studio .shell,
.workspace-templates .shell,
.workspace-trends .trend-shell,
.workspace-pricing .shell {
  grid-template-columns: var(--workspace-rail-width) minmax(0, 1fr);
}

/* 템플릿 설정: rail + 템플릿 목록 + 미리보기 + 인스펙터 */
.workspace-editor .shell {
  grid-template-columns:
    var(--workspace-rail-width)
    224px
    minmax(360px, 1fr)
    360px;
}

/* rail은 shell의 첫 자식이다. :first-child가 없으면 인스펙터·목록 aside까지
   rail 폭으로 눌린다. */
:is(
    .workspace-studio,
    .workspace-templates,
    .workspace-trends,
    .workspace-editor,
    .workspace-pricing
  )
  :is(.shell, .trend-shell)
  > :is(aside, .rail, .studio-rail):first-child {
  width: var(--workspace-rail-width);
}

:is(.workspace-studio, .workspace-templates, .workspace-trends, .workspace-pricing)
  :is(.topbar, .workspace-topbar) {
  height: var(--workspace-topbar-height);
  min-height: var(--workspace-topbar-height);
  padding-inline: var(--workspace-inset);
}

:is(
    .workspace-studio,
    .workspace-templates,
    .workspace-trends,
    .workspace-editor,
    .workspace-pricing
  )
  :is(aside, .rail, .studio-rail)
  :is(.logo, .brand, .rail-wordmark, .wordmark) {
  font-size: 18px;
  line-height: 1;
}

:is(
    .workspace-studio,
    .workspace-templates,
    .workspace-trends,
    .workspace-editor,
    .workspace-pricing
  )
  :is(aside, .rail, .studio-rail)
  :is(.mark, .brand-mark, .wordmark-mark) {
  width: 30px;
  height: 24px;
  flex: 0 0 30px;
}

@media (max-width: 900px) and (min-width: 561px) {
  .workspace-studio .shell,
  .workspace-templates .shell,
  .workspace-trends .trend-shell,
  .workspace-pricing .shell {
    grid-template-columns: 70px minmax(0, 1fr);
  }

  :is(.workspace-studio, .workspace-templates, .workspace-trends, .workspace-pricing)
    :is(.shell, .trend-shell)
    > :is(aside, .rail, .studio-rail) {
    width: 70px;
  }
}

@media (max-width: 980px) {
  .workspace-editor .shell > .rail {
    width: 100%;
  }
}

@media (max-width: 720px) {
  :root {
    --public-header-gutter: 16px;
  }

  .site-header {
    min-height: var(--public-header-height);
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    padding-block: 10px;
  }

  .site-header :is(.site-nav, .public-nav) {
    width: 100%;
    overflow-x: auto;
    gap: 20px;
    scrollbar-width: none;
  }

  .site-header :is(.site-nav, .public-nav)::-webkit-scrollbar {
    display: none;
  }
}

/* Landing surface — 공개 랜딩도 workspace rail을 공유한다.
   랜딩은 trend.css를 로드하지 않아 rail 컴포넌트를 여기서 정의한다. */
.workspace-landing .landing-shell {
  display: grid;
  grid-template-columns: var(--workspace-rail-width) minmax(0, 1fr);
  min-height: 100dvh;
}

.workspace-landing .studio-rail {
  position: sticky;
  top: 0;
  display: flex;
  width: var(--workspace-rail-width);
  height: 100dvh;
  flex-direction: column;
  padding: 24px 16px;
  border-right: 1px solid var(--border-subtle);
  background: var(--surface);
}

.workspace-landing .landing-workspace {
  min-width: 0;
}

.workspace-landing .rail-wordmark {
  padding: 0 8px 24px;
  font-size: 18px;
  line-height: 1;
  text-decoration: none;
}

.workspace-landing .rail-wordmark .brand-mark {
  width: 30px;
  height: 24px;
  flex: 0 0 30px;
}

.workspace-landing .rail-label {
  margin: 0;
  padding: 0 12px 8px;
  color: var(--text-tertiary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.workspace-landing .rail-nav {
  display: grid;
  gap: 4px;
}

.workspace-landing .rail-nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  border-radius: var(--radius-control);
  color: var(--text-secondary);
  font-size: 16px;
  text-decoration: none;
}

.workspace-landing .rail-nav-item:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}

.workspace-landing .rail-nav-item.is-active {
  background: var(--surface-raised);
  color: var(--text-primary);
}

.workspace-landing .rail-nav-item.is-active::before {
  position: absolute;
  top: 9px;
  bottom: 9px;
  left: 0;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--accent);
  content: "";
}

.workspace-landing .rail-links {
  display: flex;
  gap: 12px;
  margin-top: auto;
  padding: 16px 10px 0;
  border-top: 1px solid var(--border-subtle);
}

.workspace-landing .rail-links a {
  color: var(--text-tertiary);
  font-size: 12px;
  text-decoration: none;
}

.workspace-landing .rail-links a:hover {
  color: var(--text-primary);
}

.workspace-landing .workspace-topbar {
  display: flex;
  height: var(--workspace-topbar-height);
  min-height: var(--workspace-topbar-height);
  align-items: center;
  justify-content: space-between;
  padding-inline: var(--workspace-inset);
  border-bottom: 1px solid var(--border-subtle);
}

@media (max-width: 1120px) {
  .workspace-landing .landing-shell {
    grid-template-columns: 70px minmax(0, 1fr);
  }

  .workspace-landing .studio-rail {
    width: 70px;
    padding: 20px 8px;
  }

  .workspace-landing .rail-wordmark {
    padding-inline: 12px;
  }

  .workspace-landing
    :is(.rail-wordmark > span:last-child, .rail-label, .rail-nav-item strong, .rail-links) {
    display: none;
  }

  .workspace-landing .rail-nav-item {
    justify-content: center;
    padding: 0;
  }
}

@media (max-width: 560px) {
  :root {
    --workspace-topbar-height: 50px;
    --workspace-inset: 16px;
  }

  .workspace-landing .landing-shell {
    display: block;
  }

  .workspace-landing .studio-rail {
    position: static;
    width: 100%;
    height: auto;
    flex-direction: row;
    align-items: center;
    padding: 10px;
    border-right: 0;
    border-bottom: 1px solid var(--border-subtle);
  }

  .workspace-landing .rail-wordmark {
    padding: 0;
  }

  .workspace-landing .rail-wordmark > span:last-child {
    display: block;
  }

  .workspace-landing .rail-nav {
    display: flex;
    overflow-x: auto;
    margin-left: auto;
  }

  .workspace-landing .rail-nav-item {
    min-height: 34px;
    padding: 0 9px;
    white-space: nowrap;
  }

  .workspace-landing .rail-nav-item strong {
    display: block;
    font-size: 12px;
  }

  .workspace-studio .shell,
  .workspace-templates .shell,
  .workspace-trends .trend-shell,
  .workspace-pricing .shell {
    display: block;
  }

  :is(.workspace-studio, .workspace-templates, .workspace-trends, .workspace-pricing)
    :is(.shell, .trend-shell)
    > :is(aside, .rail, .studio-rail) {
    position: static;
    width: 100%;
    height: auto;
    flex-direction: row;
    align-items: center;
    padding: 10px;
    border-right: 0;
  }
}