body.case-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body.case-page main { flex: 1; }

.cs-main {
  display: grid;
  grid-template-columns: calc((100vh - var(--header-h) - 48px) * 2 / 3) minmax(0, 1fr);
  width: 100%;
  max-width: 1536px;
  min-height: calc(100vh - var(--header-h) - 48px);
  margin-inline: auto;
  background: var(--bg);
}

.cs-cover {
  margin: 0;
  min-height: 100%;
  overflow: hidden;
  background: var(--surface);
  border-right: 1px solid var(--border);
}

.cs-cover img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.cs-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(28px, 4vw, 56px) clamp(28px, 4.5vw, 64px);
}

.cs-back {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  gap: 8px;
  min-height: 44px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--muted);
}

.cs-back:hover { color: var(--fg); }

.cs-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px;
  margin-top: 4px;
}

.cs-meta .label + .label::before {
  content: '·';
  margin-right: 8px;
  color: var(--muted);
}

.cs-content h1 {
  max-width: 16ch;
  margin-top: 14px;
  font-size: clamp(34px, 3.3vw, 48px);
  line-height: 1.02;
}

.cs-context {
  max-width: 52ch;
  margin-top: 16px;
  font-size: 17px;
  line-height: 1.55;
  color: var(--muted);
}

.cs-sections {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px 40px;
  margin-top: 30px;
}

.cs-section {
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

.cs-section h2 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.cs-intro {
  max-width: 46ch;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--muted);
}

.cs-list {
  display: grid;
  gap: 6px;
  margin-top: 10px;
}

.cs-list li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--fg);
}

.cs-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 4px;
  height: 4px;
  background: var(--muted);
  border-radius: 1px;
}

.cs-cta {
  display: flex;
  justify-content: center;
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
}

.cs-footer {
  display: flex;
  justify-content: center;
  height: 48px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--muted);
}

.cs-footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  max-width: 1536px;
  padding-inline: var(--gutter);
}

.cs-footer a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--muted);
}

.cs-footer a:hover { color: var(--fg); }

.cs-footer .cs-social {
  justify-content: center;
  width: 44px;
  border-radius: var(--radius-sm);
}

.cs-footer .cs-social:hover { background: var(--surface-raised); }

@media (min-width: 1024px) and (max-width: 1279px) {
  .cs-content { padding: 28px 32px; }
  .cs-content h1 { font-size: clamp(30px, 3.2vw, 40px); }
  .cs-context { font-size: 15px; }
  .cs-sections { gap: 24px 28px; margin-top: 24px; }
  .cs-section { padding-top: 12px; }
  .cs-section h2 { font-size: 16px; }
  .cs-intro,
  .cs-list li { font-size: 13px; }
  .cs-list { gap: 5px; margin-top: 8px; }
}

@media (max-width: 1023px) {
  .cs-main {
    display: block;
    min-height: 0;
  }

  .cs-cover {
    max-width: 420px;
    margin-inline: auto;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .cs-cover img {
    width: 100%;
    height: auto;
    aspect-ratio: 2 / 3;
  }

  .cs-content {
    padding: 28px 24px 40px;
  }

  .cs-content h1 { font-size: clamp(32px, 8vw, 44px); }
  .cs-context { font-size: 16px; }

  .cs-sections {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 24px;
  }

  .cs-section h2 { font-size: 17px; }
  .cs-intro,
  .cs-list li { font-size: 14px; }
}

@media (max-width: 639px) {
  .cs-footer {
    height: auto;
    min-height: 48px;
    padding-block: 6px;
  }

  .cs-footer-inner {
    flex-wrap: wrap;
    row-gap: 4px;
  }
}
@media (min-width: 1280px) and (max-height: 900px) {
  .cs-content { padding: 32px 48px; }
  .cs-content h1 { font-size: clamp(36px, 3vw, 44px); }
  .cs-context { font-size: 16px; }
  .cs-sections { gap: 22px 32px; margin-top: 24px; }
  .cs-section { padding-top: 12px; }
  .cs-section h2 { font-size: 17px; }
  .cs-intro,
  .cs-list li { font-size: 14px; }
  .cs-list { gap: 5px; margin-top: 8px; }
}