/* Shared portfolio shell: navigation, case rail, and case hero rhythm. */
:root {
  --shell-max: 1500px;
  --shell-pad: 28px;
  --shell-pad-mobile: 18px;
  --shell-header: 82px;
  --shell-rail: 210px;
  --shell-case-gap: clamp(48px, 6vw, 92px);
  --shell-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, "SimSun", serif;
  --shell-body: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --shell-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.site-header {
  min-height: var(--shell-header) !important;
  height: auto !important;
  display: grid !important;
  grid-template-columns: minmax(0, 1fr) auto !important;
  align-items: center !important;
  gap: 30px !important;
  border-bottom: 1px solid var(--line) !important;
}

.site-header .edition,
.site-header .site-mark {
  color: var(--muted) !important;
  font-family: var(--mono, var(--shell-mono)) !important;
  font-size: var(--text-utility, 12px) !important;
  font-weight: 400 !important;
  letter-spacing: 0.04em !important;
  line-height: 1 !important;
  text-decoration: none !important;
  text-transform: uppercase !important;
}

.site-header .nav,
.site-header .site-nav {
  justify-self: end !important;
  display: flex !important;
  align-items: center !important;
  gap: 22px !important;
  color: var(--muted) !important;
  font-family: var(--body, var(--sans, var(--shell-body))) !important;
  font-size: var(--text-meta, 13px) !important;
  letter-spacing: 0 !important;
  text-transform: none !important;
}

.site-header .nav a,
.site-header .site-nav a {
  padding: 6px 0 5px !important;
  border-bottom: 1px solid transparent !important;
  color: inherit !important;
  text-decoration: none !important;
}

.site-header .nav a:hover,
.site-header .nav a:focus-visible,
.site-header .nav a[aria-current="page"],
.site-header .site-nav a:hover,
.site-header .site-nav a:focus-visible,
.site-header .site-nav a[aria-current="page"] {
  border-color: currentColor !important;
  color: var(--ink) !important;
  outline: none !important;
}

.case-page > main,
.case-page > .site-header {
  width: min(var(--shell-max), 100%);
  margin-right: auto;
  margin-left: auto;
}

.case-page .case-rail {
  position: fixed !important;
  z-index: 20 !important;
  top: 112px !important;
  bottom: 32px !important;
  left: max(var(--shell-pad), calc((100vw - var(--shell-max)) / 2 + var(--shell-pad))) !important;
  width: var(--shell-rail) !important;
  height: auto !important;
  margin: 0 !important;
  padding: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  border: 0 !important;
}

.case-page .rail-back {
  width: fit-content !important;
  margin: 0 0 30px !important;
  color: var(--muted) !important;
  font-size: 20px !important;
  line-height: 1 !important;
  text-decoration: none !important;
}

.case-page .rail-back:hover,
.case-page .rail-back:focus-visible {
  color: var(--ink) !important;
  outline: none !important;
}

.case-page .rail-brand {
  margin: 0 !important;
  display: grid !important;
  gap: 0 !important;
}

.case-page .rail-brand strong {
  display: flex !important;
  align-items: center !important;
  gap: 8px !important;
  font-family: var(--display, var(--serif, var(--shell-display))) !important;
  font-size: 24px !important;
  font-weight: 520 !important;
  letter-spacing: -0.035em !important;
  line-height: 1.2 !important;
}

.case-page .rail-brand img {
  width: 23px !important;
  height: 23px !important;
  border-radius: 5px !important;
}

.case-page .rail-brand span {
  display: block !important;
  margin-top: 11px !important;
  color: var(--muted) !important;
  font-family: var(--body, var(--sans, var(--shell-body))) !important;
  font-size: 12px !important;
  line-height: 1.55 !important;
}

.case-page .rail-brand > a {
  display: block !important;
  width: fit-content !important;
  margin-top: 12px !important;
  padding-bottom: 2px !important;
  border-bottom: 1px solid currentColor !important;
  color: var(--muted) !important;
  font-size: 12px !important;
  line-height: 1.45 !important;
  text-decoration: none !important;
}

.case-page .rail-brand > a:hover,
.case-page .rail-brand > a:focus-visible {
  color: var(--ink) !important;
  outline: none !important;
}

.case-page .rail-nav {
  margin-top: 54px !important;
  display: grid !important;
  gap: 13px !important;
}

.case-page .rail-nav a {
  width: 100% !important;
  display: grid !important;
  grid-template-columns: 28px minmax(0, 1fr) !important;
  gap: 0 !important;
  padding: 5px 0 !important;
  color: var(--muted) !important;
  font-family: var(--body, var(--sans, var(--shell-body))) !important;
  font-size: var(--text-meta, 13px) !important;
  font-weight: 400 !important;
  line-height: 1.4 !important;
  text-decoration: none !important;
  transition: color 160ms ease !important;
}

.case-page .rail-nav a span {
  display: block !important;
  margin: 0 !important;
  font-family: var(--mono, var(--shell-mono)) !important;
  font-size: 10px !important;
}

.case-page .rail-nav a:hover,
.case-page .rail-nav a:focus-visible,
.case-page .rail-nav a.is-active {
  color: var(--ink) !important;
  outline: none !important;
}

.case-page .rail-nav a.is-active {
  font-weight: 650 !important;
}

.case-page .hero {
  min-height: calc(100svh - var(--shell-header)) !important;
  height: auto !important;
  padding: clamp(34px, 5vh, 58px) 0 !important;
  display: grid !important;
  grid-template-columns: minmax(340px, 0.88fr) minmax(0, 1.32fr) !important;
  gap: var(--shell-case-gap) !important;
  align-items: center !important;
}

.case-proactor .hero {
  margin-left: calc(var(--shell-rail) + var(--shell-case-gap)) !important;
  margin-right: 0 !important;
}

.case-viralux .hero,
.case-capafy .hero {
  margin-left: calc(var(--shell-pad) + var(--shell-rail) + var(--shell-case-gap)) !important;
  margin-right: var(--shell-pad) !important;
}

.case-page .hero-copy,
.case-page .hero > div:first-child {
  transform: translateY(-18px) !important;
}

.case-page .eyebrow {
  display: block !important;
  margin: 0 0 18px !important;
  color: var(--muted) !important;
  font-family: var(--mono, var(--shell-mono)) !important;
  font-size: var(--text-utility, 12px) !important;
  letter-spacing: 0.05em !important;
  line-height: 1.4 !important;
  text-transform: uppercase !important;
}

.case-page .hero h1,
.case-page .hero-title h1,
.case-page .hero-statement {
  max-width: 620px !important;
  margin: 0 0 24px !important;
  font-family: var(--display, var(--serif, var(--shell-display))) !important;
  font-size: var(--display-hero, clamp(38px, 3vw, 46px)) !important;
  font-weight: 510 !important;
  letter-spacing: -0.045em !important;
  line-height: 1.16 !important;
}

.case-page .hero-statement {
  display: block !important;
}

.case-page .hero-summary,
.case-page .hero-title p.hero-summary {
  max-width: 580px !important;
  margin: 0 !important;
  color: var(--muted) !important;
  font-family: var(--body, var(--sans, var(--shell-body))) !important;
  font-size: var(--text-body, 15px) !important;
  line-height: 1.75 !important;
}

.case-page .hero-summary + .hero-summary {
  margin-top: 14px !important;
}

.case-page .hero-tags {
  margin: 20px 0 0 !important;
  padding: 0 !important;
  display: flex !important;
  flex-wrap: wrap !important;
  gap: 8px !important;
  color: var(--ink) !important;
  font-size: var(--text-utility, 12px) !important;
  line-height: 1 !important;
  list-style: none !important;
}

.case-page .hero-tags li,
.case-page .hero-tags li:last-child {
  margin: 0 !important;
  padding: 7px 10px !important;
  border: 1px solid var(--line) !important;
}

.case-page .product-stage {
  min-width: 0 !important;
  min-height: clamp(420px, 39vw, 560px) !important;
  height: auto !important;
  margin: 0 !important;
  order: initial !important;
  transform: translateY(-18px) !important;
}

@media (max-width: 1120px) {
  :root {
    --shell-rail: 180px;
    --shell-case-gap: 42px;
  }

  .case-page .hero {
    grid-template-columns: minmax(300px, 0.9fr) minmax(0, 1.1fr) !important;
    gap: 40px !important;
  }
}

@media (max-width: 860px) {
  :root {
    --shell-header: 72px;
  }

  .site-header .nav,
  .site-header .site-nav {
    gap: 16px !important;
  }

  .case-proactor > main {
    padding-right: var(--shell-pad-mobile) !important;
    padding-left: var(--shell-pad-mobile) !important;
  }

  .case-page .case-rail {
    position: static !important;
    width: auto !important;
    height: auto !important;
    display: block !important;
    padding: 24px 0 20px !important;
    border-bottom: 1px solid var(--line) !important;
  }

  .case-proactor .case-rail {
    margin: 0 !important;
  }

  .case-viralux .case-rail,
  .case-capafy .case-rail {
    margin: 0 var(--shell-pad-mobile) !important;
  }

  .case-page .rail-back,
  .case-page .rail-brand > a {
    display: none !important;
  }

  .case-page .rail-brand {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    gap: 18px !important;
  }

  .case-page .rail-brand span {
    margin: 0 0 0 auto !important;
    text-align: right !important;
  }

  .case-page .rail-nav {
    margin-top: 20px !important;
    display: flex !important;
    gap: 16px !important;
    overflow-x: auto !important;
    padding-bottom: 2px !important;
    scrollbar-width: thin;
  }

  .case-page .rail-nav a {
    min-width: max-content !important;
    width: auto !important;
    display: flex !important;
    gap: 6px !important;
    padding: 5px 0 !important;
  }

  .case-page .hero {
    min-height: auto !important;
    padding: 64px 0 86px !important;
    grid-template-columns: 1fr !important;
    gap: 48px !important;
  }

  .case-proactor .hero {
    margin-right: 0 !important;
    margin-left: 0 !important;
  }

  .case-viralux .hero,
  .case-capafy .hero {
    margin-right: var(--shell-pad-mobile) !important;
    margin-left: var(--shell-pad-mobile) !important;
  }

  .case-page .hero-copy,
  .case-page .hero > div:first-child,
  .case-page .product-stage {
    transform: none !important;
  }

  .case-page .product-stage {
    min-height: 420px !important;
  }
}

@media (max-width: 560px) {
  .site-header {
    grid-template-columns: 1fr !important;
  }

  .site-header .edition,
  .site-header .site-mark {
    display: none !important;
  }

  .site-header .nav,
  .site-header .site-nav {
    justify-self: end !important;
  }

  .case-page .hero h1,
  .case-page .hero-title h1,
  .case-page .hero-statement {
    font-size: 36px !important;
  }

  .case-page .product-stage {
    min-height: 340px !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .case-page .rail-nav a {
    transition: none !important;
  }
}