/* =========================================================
   Function Psi — case studies
   ========================================================= */

.case-hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(2.5rem, 6vw, 5rem));
  padding-bottom: clamp(2rem, 5vw, 4rem);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.case-hero::before {
  content: "";
  position: absolute;
  top: -12rem;
  right: -10rem;
  width: min(60vw, 52rem);
  height: min(60vw, 52rem);
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 14%, transparent), transparent 67%);
  pointer-events: none;
}

.case-breadcrumb {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.case-breadcrumb a {
  transition: color 0.25s ease;
}

.case-breadcrumb a:hover {
  color: var(--accent);
}

.case-breadcrumb span {
  color: var(--line-strong);
}

.case-hero__head {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(15rem, 0.32fr);
  gap: clamp(2rem, 6vw, 7rem);
  align-items: end;
  margin-top: clamp(2rem, 5vw, 4rem);
}

.case-hero h1 {
  max-width: 10ch;
  font-size: clamp(4rem, 11vw, 12rem);
  line-height: 0.79;
  letter-spacing: -0.08em;
}

.case-hero h1 em {
  color: var(--accent);
  font-family: var(--serif);
  font-weight: 400;
}

.case-hero__summary {
  padding-bottom: 0.4rem;
  color: var(--ink-dim);
  font-size: 0.98rem;
  line-height: 1.6;
}

.case-hero__summary strong {
  display: block;
  margin-bottom: 1rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.case-cover {
  position: relative;
  margin-top: clamp(2rem, 5vw, 4rem);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-deep);
}

.case-cover img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.case-cover__label {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(8, 9, 10, 0.6);
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 0.57rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.case-meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(1.5rem, 3vw, 2.5rem);
  border: 1px solid var(--line);
  background: var(--line);
}

.case-meta__item {
  padding: 1rem 1.1rem;
  background: var(--bg);
}

.case-meta__label {
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 0.56rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.case-meta__value {
  margin-top: 0.45rem;
  font-size: 0.88rem;
  line-height: 1.35;
}

.case-body {
  padding-block: clamp(4rem, 9vw, 8rem);
  border-bottom: 1px solid var(--line);
}

.case-body__grid {
  display: grid;
  grid-template-columns: minmax(12rem, 0.42fr) minmax(0, 1.58fr);
  gap: clamp(2rem, 7vw, 9rem);
  align-items: start;
}

.case-aside {
  position: sticky;
  top: calc(var(--header-h) + 2rem);
}

.case-aside__title {
  margin-bottom: 1.2rem;
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.case-aside__list {
  display: grid;
  gap: 0.7rem;
}

.case-aside__list a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.8rem;
  transition: color 0.25s ease;
}

.case-aside__list a::before {
  content: "";
  width: 0.3rem;
  height: 0.3rem;
  border-radius: 50%;
  background: var(--line-strong);
  transition: background-color 0.25s ease;
}

.case-aside__list a:hover,
.case-aside__list a.is-active {
  color: var(--ink);
}

.case-aside__list a:hover::before,
.case-aside__list a.is-active::before {
  background: var(--accent);
}

.case-aside__note {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.05em;
  line-height: 1.7;
  text-transform: uppercase;
}

.case-content {
  max-width: 62rem;
}

.case-section {
  scroll-margin-top: calc(var(--header-h) + 2rem);
}

.case-section + .case-section {
  margin-top: clamp(4rem, 8vw, 7rem);
}

.case-section__eyebrow {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.case-section__eyebrow::before {
  content: "";
  width: 1.5rem;
  height: 1px;
  background: var(--accent);
}

.case-section h2 {
  max-width: 18ch;
  font-size: clamp(2.1rem, 4.5vw, 4.1rem);
  font-weight: 450;
  line-height: 0.98;
}

.case-section h2 em {
  color: var(--accent);
  font-family: var(--serif);
  font-weight: 400;
}

.case-prose {
  max-width: 44rem;
  margin-top: 1.5rem;
}

.case-prose p {
  color: var(--ink-dim);
  font-size: clamp(0.97rem, 1vw, 1.08rem);
  line-height: 1.72;
}

.case-prose p + p {
  margin-top: 1.2rem;
}

.case-prose strong {
  color: var(--ink);
  font-weight: 500;
}

.case-prose em {
  color: var(--accent);
  font-family: var(--serif);
  font-size: 1.06em;
  font-weight: 400;
}

.case-quote {
  max-width: 30ch;
  margin-block: clamp(2.5rem, 6vw, 4.5rem);
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(2rem, 4.2vw, 3.8rem);
  font-style: italic;
  line-height: 1;
  letter-spacing: -0.03em;
}

.case-quote span {
  color: var(--accent);
}

.case-list {
  display: grid;
  margin-top: 1.8rem;
  border-top: 1px solid var(--line);
}

.case-list li {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: 1rem;
  padding-block: 1.1rem;
  border-bottom: 1px solid var(--line);
  color: var(--ink-dim);
  font-size: 0.92rem;
  line-height: 1.55;
}

.case-list li span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.06em;
}

.case-artifact {
  position: relative;
  display: flex;
  min-height: 26rem;
  flex-direction: column;
  justify-content: space-between;
  margin-top: 2rem;
  padding: clamp(1.2rem, 3vw, 2rem);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-deep);
  isolation: isolate;
}

.case-artifact::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(circle at 70% 30%, color-mix(in srgb, var(--accent) 20%, transparent), transparent 52%);
}

.case-artifact__top,
.case-artifact__bottom {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.57rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.case-artifact__top span:last-child {
  color: var(--accent);
}

.case-artifact__center {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  flex: 1;
  min-height: 15rem;
}

.case-artifact__word {
  color: var(--ink);
  font-size: clamp(4rem, 12vw, 10rem);
  font-weight: 300;
  letter-spacing: -0.1em;
  line-height: 0.75;
  text-align: center;
}

.case-artifact__word em {
  color: var(--accent);
  font-family: var(--serif);
  font-weight: 400;
}

.case-artifact--rings::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(48vw, 28rem);
  aspect-ratio: 1;
  border: 1px solid color-mix(in srgb, var(--accent) 55%, transparent);
  border-radius: 50%;
  transform: translate(-50%, -50%) scaleY(0.45) rotate(-18deg);
  box-shadow:
    0 0 0 2.4rem color-mix(in srgb, var(--accent) 9%, transparent),
    0 0 0 4.8rem color-mix(in srgb, var(--accent) 5%, transparent);
}

.case-artifact--rings::before {
  background:
    radial-gradient(circle at 50% 50%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 40%),
    var(--bg-deep);
}

.case-artifact--grid {
  background-image:
    linear-gradient(color-mix(in srgb, var(--ink) 8%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--ink) 8%, transparent) 1px, transparent 1px);
  background-size: 3rem 3rem;
}

.case-artifact--grid .case-artifact__word {
  padding: 1rem 1.5rem;
  border: 1px solid var(--line-strong);
  background: rgba(8, 9, 10, 0.72);
}

.case-artifact--stack::before {
  background:
    linear-gradient(135deg, transparent 42%, color-mix(in srgb, var(--accent) 25%, transparent) 42.2%, transparent 43%),
    linear-gradient(45deg, transparent 56%, color-mix(in srgb, var(--ink) 12%, transparent) 56.2%, transparent 57%),
    var(--bg-deep);
}

.case-artifact--wave::before {
  background:
    repeating-radial-gradient(ellipse at 50% 120%, transparent 0 1.2rem, color-mix(in srgb, var(--accent) 18%, transparent) 1.25rem 1.3rem, transparent 1.35rem 2.6rem),
    var(--bg-deep);
}

.case-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.case-gallery .case-artifact {
  min-height: 20rem;
  margin-top: 0;
}

.case-gallery .case-artifact__word {
  font-size: clamp(3rem, 7vw, 5.5rem);
}

.case-outcome {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 2rem;
  border: 1px solid var(--line);
  background: var(--line);
}

.case-outcome__item {
  padding: clamp(1.2rem, 2.5vw, 1.8rem);
  background: var(--bg);
}

.case-outcome__item span {
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 0.56rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.case-outcome__item strong {
  display: block;
  margin-top: 0.6rem;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.4;
}

.case-outcome__note {
  max-width: 44rem;
  margin-top: 1.6rem;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

.case-next {
  display: block;
  padding-block: clamp(4rem, 9vw, 8rem);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.4s var(--ease-out);
}

.case-next:hover,
.case-next:focus-visible {
  background: var(--bg-deep);
}

.case-next__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.case-next__head span:last-child {
  color: var(--lime);
  font-size: 1.4rem;
}

.case-next__title {
  max-width: 12ch;
  margin-top: 1.4rem;
  font-size: clamp(3.4rem, 9vw, 9rem);
  line-height: 0.82;
  letter-spacing: -0.08em;
}

.case-next__title em {
  color: var(--lime);
  font-family: var(--serif);
  font-weight: 400;
}

.case-next__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.4rem;
  margin-top: 1.4rem;
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.theme-aetherium {
  --accent: var(--lime);
}

.theme-kinetic {
  --accent: #ffb05c;
}

.theme-orbital {
  --accent: #7ee7ff;
}

.theme-monolith {
  --accent: #ff7a59;
}

.theme-field-notes {
  --accent: #f1dbb5;
}

.theme-signal-garden {
  --accent: #a5ff8b;
}

.case-progress {
  position: fixed;
  top: var(--header-h);
  right: 0;
  left: 0;
  z-index: 95;
  height: 1px;
  background: transparent;
}

.case-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
}

@media (max-width: 1100px) {
  .case-hero__head {
    grid-template-columns: minmax(0, 1fr) minmax(13rem, 0.4fr);
  }

  .case-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .case-hero__head {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .case-hero h1 {
    font-size: clamp(3.8rem, 14vw, 8rem);
  }

  .case-body__grid {
    grid-template-columns: 1fr;
  }

  .case-aside {
    position: static;
  }

  .case-aside__list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.2rem;
  }

  .case-aside__note {
    display: none;
  }
}

@media (max-width: 650px) {
  .case-hero {
    padding-top: calc(var(--header-h) + 2rem);
  }

  .case-hero h1 {
    font-size: clamp(3.4rem, 17vw, 6rem);
  }

  .case-cover img {
    aspect-ratio: 4 / 3;
  }

  .case-meta {
    grid-template-columns: 1fr;
  }

  .case-artifact {
    min-height: 21rem;
  }

  .case-gallery {
    grid-template-columns: 1fr;
  }

  .case-outcome {
    grid-template-columns: 1fr;
  }

  .case-list li {
    grid-template-columns: 2.2rem minmax(0, 1fr);
  }
}