/* Case studies: persistent index at left, one continuous reading column at right. */
html:has(.case-layout) { scroll-padding-top: 130px; }
.case-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: clamp(36px, 4.5vw, 72px);
  max-width: 1480px;
  margin: 0 auto;
  padding: 32px var(--gutter) 0;
  align-items: start;
}
.case-index {
  position: sticky;
  top: 124px;
  max-height: calc(100dvh - 150px);
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-self: start;
  padding-right: 24px;
  border-right: 1px solid var(--line);
}
.index-back { display: inline-flex; align-items: center; min-height: 44px; font-size: 12px; color: var(--muted); margin-bottom: 20px; }
.index-back:hover { color: var(--ink); }
.index-kicker { font-size: 9px; letter-spacing: 1.5px; margin: 0 0 7px; color: #9296a2; }
.index-title { font-size: 17px; font-weight: 600; color: var(--ink); letter-spacing: -.5px; line-height: 1.5; margin-bottom: 28px; }
.index-panel { display: flex; flex-direction: column; min-height: 0; }
.index-panel-body { display: flex; flex-direction: column; min-height: 0; }
.index-toggle { display: none; }
.index-heading { font-size: 9px; letter-spacing: 1.6px; color: #9296a2; margin-bottom: 11px; }
.index-links { overflow-y: auto; scrollbar-width: thin; scrollbar-color: #41444e transparent; overscroll-behavior: contain; max-height: calc(100dvh - 412px); padding: 3px 5px 3px 0; }
.index-link {
  display: grid;
  grid-template-columns: 22px 1fr;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  min-height: 42px;
  border-left: 2px solid transparent;
  border-radius: 0 5px 5px 0;
  font-size: 12px;
  line-height: 1.55;
  color: #9da0aa;
  transition: color .18s, background .18s, border-color .18s;
}
.index-link + .index-link { margin-top: 3px; }
.index-number { font-size: 10px; font-variant-numeric: tabular-nums; color: #828692; }
.index-link:hover { color: #f2f3f8; background: #1c1e25; }
.index-link[aria-current="location"] { color: #e7ecff; background: #232936; border-left-color: #bbc8ff; }
.index-link[aria-current="location"] .index-number { color: #bbc8ff; }
.index-link:focus-visible { outline-offset: -2px; }
.index-progress { margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--line); }
.index-progress > div { display: flex; justify-content: space-between; gap: 12px; font-size: 10px; color: #9296a2; }
.index-progress progress { display: block; width: 100%; height: 3px; margin-top: 10px; appearance: none; border: 0; background: #30333d; color: #bac8ff; border-radius: 2px; overflow: hidden; }
.index-progress progress::-webkit-progress-bar { background: #30333d; }
.index-progress progress::-webkit-progress-value { background: #bac8ff; }
.index-progress progress::-moz-progress-bar { background: #bac8ff; }
.case-content { min-width: 0; container-type: inline-size; container-name: study; }
.case-content .case-hero { width: 100%; max-width: none; margin: 0; padding: 12px 0 0; }
.case-content .case-hero .eyebrow { font-size: 10px; letter-spacing: 1.4px; margin-bottom: 22px; }
.case-content .case-hero h1 { font-size: clamp(42px, 5.4vw, 76px); letter-spacing: -2.8px; line-height: 1.12; margin-bottom: 25px; }
.case-content .case-deck { font-size: 17px; line-height: 1.85; max-width: 66ch; color: #a9adb8; }
.case-content .case-cover { width: 100%; padding: 30px 7% 0; margin-top: 35px; max-height: none; }
.case-content .case-cover > img { height: auto; }
.case-content .case-section { width: 100%; max-width: none !important; margin: 0 !important; padding: 54px 0 !important; }
.case-content .case-section[data-m="meta"] { padding: 28px 0 !important; gap: 20px !important; }
.case-content .case-section[data-m="meta"] p:last-child { font-size: 12px; }
.case-content .case-section h2 { font-size: clamp(30px, 3.2vw, 44px); line-height: 1.23; letter-spacing: -1.4px; }
.case-content .case-section p { font-size: 15px; line-height: 1.9; }
.case-content .case-section p.eyebrow { font-size: 10px; margin-bottom: 15px !important; }
.case-content .case-section > p { max-width: 72ch !important; }
.case-content .case-section .insight-card p { font-size: 14px; }
.case-content .case-section [style*="display:grid"] { gap: 24px !important; }
.case-content .case-section .stat-value { font-size: clamp(24px, 3vw, 36px); }
.case-content .study-visual { margin: 18px 0; }
.case-content .next-project { width: 100%; max-width: none; padding: 35px 0; margin: 25px 0 45px; }
.case-content .next-project h2 { font-size: clamp(30px, 3.5vw, 48px); }
.case-content .round-arrow { width: 58px; height: 58px; }
.case-content .round-arrow svg { width: 24px; height: 24px; }
.case-content [tabindex="-1"]:focus { outline: none; }
@container study (max-width: 660px) {
  .case-content .case-section [style*="display:grid"] { grid-template-columns: 1fr !important; gap: 22px !important; }
  .case-content .case-section [style*="order:"] { order: 0 !important; }
  .case-content .case-section[data-m="meta"] { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
  .case-content .case-section h2 { font-size: 32px; }
}
@media (max-width: 1100px) and (min-width: 761px) {
  .case-layout { grid-template-columns: 182px minmax(0, 1fr); gap: 30px; padding-inline: 30px; }
  .case-index { padding-right: 16px; }
  .index-title { font-size: 15px; }
  .index-link { padding: 9px 8px; grid-template-columns: 19px 1fr; gap: 7px; font-size: 11px; }
  .case-content .case-hero h1 { font-size: 52px; letter-spacing: -2px; }
  .case-content .case-deck { font-size: 16px; }
}
@media (max-width: 760px) {
  html:has(.case-layout) { scroll-padding-top: 158px; }
  .case-layout { display: block; padding: 0 var(--gutter); }
  .case-index { top: 81px; padding: 0; border: 0; max-height: none; background: #101113f7; backdrop-filter: blur(16px); z-index: 80; margin-bottom: 24px; }
  .index-project { display: none; }
  .index-panel { display: block; }
  .index-toggle { display: flex; align-items: center; gap: 12px; padding: 17px 0; min-height: 58px; border-bottom: 1px solid #353842; cursor: pointer; list-style: none; font-size: 11px; }
  .index-toggle::-webkit-details-marker { display: none; }
  .index-toggle > span:first-child { color: #aaafbb; }
  .index-current { margin-left: auto; color: #e0e7ff; max-width: 55%; text-overflow: ellipsis; white-space: nowrap; overflow: hidden; }
  .index-toggle svg { height: 15px; width: 15px; color: #bac8ff; transition: transform .2s; }
  .index-panel[open] .index-toggle svg { transform: rotate(180deg); }
  .index-panel-body { padding: 12px 0 16px; border-bottom: 1px solid #353842; }
  .index-heading, .index-progress { display: none; }
  .index-links { max-height: min(55dvh, 430px); padding: 2px 5px 2px 0; }
  .index-link { font-size: 13px; min-height: 44px; padding: 10px 12px; }
  .case-content .case-hero { padding: 10px 0 0; }
  .case-content .case-hero h1 { font-size: clamp(39px, 8vw, 56px); letter-spacing: -1.8px; }
  .case-content .case-hero .eyebrow { margin-bottom: 20px; font-size: 9px; }
  .case-content .case-deck { font-size: 15px; line-height: 1.85; }
  .case-content .case-cover { padding: 22px 6% 0; margin-top: 28px; }
  .case-content .case-section { padding: 38px 0 !important; }
  .case-content .case-section h2 { font-size: 30px; letter-spacing: -.9px; }
  .case-content .case-section p { font-size: 14px; }
  .case-content .case-section[data-m="meta"] { gap: 22px !important; }
}
@media (max-height: 700px) and (min-width: 761px) {
  .index-back { margin-bottom: 10px; }
  .index-title { margin-bottom: 14px; }
  .index-links { max-height: calc(100dvh - 340px); }
  .index-progress { margin-top: 12px; padding-top: 12px; }
}
@media (prefers-reduced-motion: reduce) { .index-link, .index-toggle svg { transition: none; } }
@media print {
  .case-index { display: none; }
  .case-layout { display: block; padding: 0; }
  .case-content { container-type: normal; }
}


/* A steady reading rhythm; the left index keeps its existing sticky behavior. */
@media screen {
  .case-layout { max-width: var(--max); padding-top: var(--space-5); }
  .case-content .case-hero { padding-top: 0; }
  .case-content .case-hero .eyebrow { margin-bottom: var(--space-3); }
  .case-content .case-hero h1 { margin-bottom: var(--space-3); }
  .case-content .case-deck { max-width: 62ch; }
  .case-content .case-cover { margin-top: var(--space-4); }
  .case-content .case-section { padding-block: var(--space-6) !important; }
  .case-content .case-section[data-m="meta"] { padding-block: var(--space-4) !important; gap: var(--space-3) !important; }
  .case-content .case-section h2 { margin-bottom: var(--space-3) !important; }
  .case-content .case-section h3 { margin: var(--space-4) 0 var(--space-2) !important; }
  .case-content .case-section > p { max-width: 68ch !important; }
  .case-content .case-section > p:not(.eyebrow) { margin-bottom: var(--space-4) !important; }
  .case-content .case-section p.eyebrow { margin-bottom: var(--space-2) !important; }
  .case-content .case-section > :last-child { margin-bottom: 0 !important; }
  .case-content .case-section [data-m="two"] { gap: var(--space-4) !important; }
  .case-content .case-section:not([data-m="meta"]) .insight-card { padding: var(--card-space); }
  .case-content .study-visual { margin-block: var(--space-3); }
  .case-content [data-m="two"] > .study-visual { margin-block: 0; }
  .case-content .next-project { margin-block: var(--space-3) var(--space-5); padding-block: var(--space-4); }
}
@media screen and (max-width: 760px) {
  .case-layout { padding-top: 0; }
  .case-index { margin-bottom: var(--space-4); }
  .case-content .case-section { padding-block: var(--space-5) !important; }
  .case-content .case-section[data-m="meta"] { padding-block: var(--space-3) !important; }
  .case-content .case-section [data-m="two"] { gap: var(--space-3) !important; }
  .case-content .next-project { margin-bottom: var(--space-4); }
}