:root {
  --case-navy: #111d4a;
  --case-navy-soft: #1d2d66;
  --case-coral: #ef5b4b;
  --case-ink: #14213d;
  --case-paper: #f4f7fb;
  --case-line: #d8e0ec;
}

.case-study-main {
  background: #fff;
  color: var(--case-ink);
}

.case-breadcrumb {
  border-bottom: 1px solid var(--case-line);
  background: #fff;
}

.case-breadcrumb .container {
  display: flex;
  align-items: center;
  gap: .55rem;
  min-height: 44px;
  font-size: .78rem;
  color: #66748d;
}

.case-breadcrumb a {
  color: var(--case-navy);
  font-weight: 700;
}

.case-hero {
  padding: clamp(3.4rem, 7vw, 6.8rem) 0 clamp(2.8rem, 6vw, 5.2rem);
  background: var(--case-navy);
  color: #fff;
  overflow: hidden;
}

.case-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, .72fr);
  align-items: end;
  gap: clamp(2.5rem, 7vw, 7.5rem);
}

.case-kicker {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  margin: 0 0 1.2rem;
  color: #ff786a;
  font-size: .73rem;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.case-kicker::before {
  content: "";
  width: 34px;
  height: 2px;
  background: currentColor;
}

.case-hero h1 {
  max-width: 900px;
  margin: 0;
  color: #fff;
  font-size: clamp(2.5rem, 5.8vw, 5.7rem);
  line-height: .98;
  letter-spacing: -.045em;
}

.case-hero-lead {
  max-width: 690px;
  margin: 1.5rem 0 0;
  color: #dce4fa;
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  line-height: 1.75;
}

.case-ledger {
  margin: 0;
  border-top: 1px solid rgba(255,255,255,.34);
}

.case-ledger div {
  display: grid;
  grid-template-columns: 7.2rem 1fr;
  gap: 1rem;
  padding: .95rem 0;
  border-bottom: 1px solid rgba(255,255,255,.18);
}

.case-ledger dt {
  color: #aebbdc;
  font-size: .69rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.case-ledger dd {
  margin: 0;
  color: #fff;
  font-weight: 650;
}

.case-visual {
  padding: clamp(2.5rem, 5vw, 5rem) 0;
  background: var(--case-paper);
}

.case-compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(.75rem, 2vw, 1.5rem);
}

.case-frame {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: #dfe5ee;
}

.case-frame img {
  width: 100%;
  aspect-ratio: 8 / 5;
  object-fit: cover;
}

.case-frame figcaption {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  padding: .45rem .72rem;
  background: rgba(17,29,74,.9);
  color: #fff;
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
  backdrop-filter: blur(7px);
}

.case-frame:last-child figcaption {
  background: rgba(239,91,75,.94);
}

.case-content {
  padding: clamp(3.4rem, 7vw, 7rem) 0;
}

.case-content-grid {
  display: grid;
  grid-template-columns: minmax(210px, .55fr) minmax(0, 1.45fr);
  gap: clamp(2.5rem, 7vw, 8rem);
  align-items: start;
}

.case-aside {
  position: sticky;
  top: 128px;
  padding-top: .45rem;
  border-top: 3px solid var(--case-coral);
}

.case-aside strong {
  display: block;
  margin: .8rem 0 .35rem;
  font-family: var(--font-heading);
  font-size: 1.45rem;
  color: var(--case-navy);
}

.case-aside p {
  color: #66748d;
  line-height: 1.65;
}

.case-copy {
  max-width: 780px;
}

.case-copy h2 {
  margin: 0 0 1.1rem;
  color: var(--case-navy);
  font-size: clamp(2rem, 4vw, 3.25rem);
  letter-spacing: -.025em;
}

.case-copy h3 {
  margin: 2.2rem 0 .75rem;
  color: var(--case-navy);
  font-size: clamp(1.35rem, 2.2vw, 1.8rem);
}

.case-copy p,
.case-copy li {
  color: #43516a;
  line-height: 1.78;
}

.case-copy ul {
  display: grid;
  gap: .65rem;
  margin: 1rem 0 1.8rem;
  padding-left: 1.2rem;
}

.case-answer {
  margin: 2rem 0;
  padding: 1.4rem 1.55rem;
  border-left: 4px solid var(--case-coral);
  background: var(--case-paper);
}

.case-answer strong {
  color: var(--case-navy);
}

.case-links {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: 2rem;
}

.case-links a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: .65rem .9rem;
  border: 1px solid var(--case-line);
  color: var(--case-navy);
  font-weight: 750;
}

.case-links a:hover,
.case-links a:focus-visible {
  border-color: var(--case-coral);
  color: #c83f33;
}

.case-cta {
  padding: clamp(3.2rem, 6vw, 5.5rem) 0;
  background: #edf2f8;
}

.case-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.case-cta h2 {
  max-width: 720px;
  margin: 0 0 .65rem;
  color: var(--case-navy);
}

.case-cta p {
  margin: 0;
  color: #52617a;
}

.case-detail-link {
  display: inline-flex;
  margin-top: 1rem;
  color: #c83f33;
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: .03em;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.case-proof-link {
  padding: clamp(2.5rem, 5vw, 4.5rem) 0;
  background: #fff;
}

.case-proof-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 2rem;
  padding: clamp(1.5rem, 4vw, 2.6rem);
  border-top: 1px solid var(--case-line);
  border-bottom: 1px solid var(--case-line);
}

.case-proof-label {
  margin: 0 0 .45rem;
  color: #c83f33;
  font-size: .7rem;
  font-weight: 850;
  letter-spacing: .13em;
  text-transform: uppercase;
}

.case-proof-inner h2 {
  margin: 0 0 .45rem;
  color: var(--case-navy);
  font-size: clamp(1.55rem, 3vw, 2.25rem);
}

.case-proof-inner p:last-child {
  margin-bottom: 0;
}

.case-proof-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: .75rem 1rem;
  border: 1px solid var(--case-navy);
  color: var(--case-navy);
  font-weight: 800;
  white-space: nowrap;
}

.case-proof-action:hover,
.case-proof-action:focus-visible {
  background: var(--case-navy);
  color: #fff;
}

@media (max-width: 820px) {
  .case-hero-grid,
  .case-content-grid {
    grid-template-columns: 1fr;
  }

  .case-hero-grid {
    align-items: start;
  }

  .case-ledger {
    max-width: 560px;
  }

  .case-aside {
    position: static;
    max-width: 520px;
  }

  .case-cta-inner,
  .case-proof-inner {
    align-items: flex-start;
    grid-template-columns: 1fr;
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .case-compare {
    grid-template-columns: 1fr;
  }

  .case-hero h1 {
    font-size: clamp(2.3rem, 12vw, 3.7rem);
  }

  .case-ledger div {
    grid-template-columns: 6rem 1fr;
  }

  .case-frame figcaption {
    left: .75rem;
    bottom: .75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .case-study-main *,
  .case-proof-link * {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}

/* Keep hierarchy functional: no decorative red bars. */
.case-kicker::before { display: none; }
.case-aside { border-top: 0; }
.case-answer { border-left: 0; border: 1px solid var(--case-line); }