/* Case study page — editorial, premium */

:root {
  --cs-max: 1200px;
  --cs-px: 64px;
}

.cs {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--bg);
  letter-spacing: -0.005em;
}

.cs section { padding: 96px var(--cs-px); }
.cs .wrap { max-width: var(--cs-max); margin: 0 auto; }

@media (max-width: 900px) { :root { --cs-px: 28px; } .cs section { padding: 64px var(--cs-px); } }

/* Top bar (editorial, very thin) */
.cs-nav {
  display: flex; align-items: center; gap: 20px;
  padding: 20px var(--cs-px);
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
}
.cs-nav-brand { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.cs-nav-brand-mark {
  width: 22px; height: 22px; border-radius: 4px;
  background: var(--ink); color: #fff;
  display: grid; place-items: center;
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
}
.cs-nav-meta {
  margin-left: auto; display: flex; gap: 18px;
  color: var(--ink-3); font-family: var(--font-mono); font-size: 11px;
}
.cs-nav-cta { padding: 6px 14px; border: 1px solid var(--ink); border-radius: 999px; font-size: 12px; }

/* Hero */
.cs-hero { padding-top: 80px; padding-bottom: 0; }
.cs-hero-eyebrow {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--font-mono); font-size: 11px;
  color: var(--ink-3); letter-spacing: 0.06em; text-transform: uppercase;
  margin-bottom: 32px;
}
.cs-hero-eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); display: inline-block; }
.cs-hero h1 {
  font-size: clamp(48px, 7vw, 92px);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 0.98;
  margin: 0 0 28px;
  text-wrap: balance;
}
.cs-hero h1 em {
  font-style: normal;
  color: var(--accent);
}
.cs-hero-sub {
  font-size: 19px;
  line-height: 1.5;
  color: var(--ink-2);
  max-width: 720px;
  margin: 0 0 56px;
  text-wrap: pretty;
}
.cs-hero-meta {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
}
.cs-hero-meta-cell {
  padding: 4px 24px;
  border-right: 1px solid var(--line);
}
.cs-hero-meta-cell:last-child { border-right: 0; }
.cs-hero-meta-cell:first-child { padding-left: 0; }
.cs-hero-meta-label {
  font-family: var(--font-mono); font-size: 10.5px;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ink-4);
  margin-bottom: 6px;
}
.cs-hero-meta-val {
  font-size: 14px; font-weight: 500;
}

/* Hero mockup (full-bleed) */
.cs-hero-mockup {
  margin-top: 64px;
  padding: 0 var(--cs-px) 0;
}
.cs-hero-mockup-frame {
  border: 1px solid var(--line);
  border-radius: 10px 10px 0 0;
  background: var(--surface);
  overflow: hidden;
  box-shadow: 0 -2px 0 var(--bg-2), 0 30px 80px -30px rgba(20,20,18,0.18);
}
.cs-hero-mockup-bar {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-tint);
}
.cs-hero-mockup-bar .dot-r { width: 9px; height: 9px; border-radius: 50%; background: var(--bg-3); }
.cs-hero-mockup-bar .url {
  margin-left: 14px;
  font-family: var(--font-mono); font-size: 11px;
  color: var(--ink-4);
}

/* Generic section title */
.cs-section-head {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 64px;
  align-items: baseline;
  margin-bottom: 56px;
}
.cs-section-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-4);
}
.cs-section-num strong { color: var(--ink); display: block; margin-bottom: 4px; font-weight: 500; }
.cs-section-title {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 500;
  letter-spacing: -0.024em;
  line-height: 1.05;
  margin: 0;
  text-wrap: balance;
}
.cs-section-title em { font-style: normal; color: var(--ink-3); }

@media (max-width: 760px) {
  .cs-section-head { grid-template-columns: 1fr; gap: 16px; margin-bottom: 36px; }
}

/* Problem/Solution split */
.cs-split {
  display: grid;
  grid-template-columns: 200px 1fr 1fr;
  gap: 64px;
}
.cs-split-side { font-family: var(--font-mono); font-size: 11px; color: var(--ink-4); letter-spacing: 0.08em; }
.cs-split-col h3 {
  font-size: 22px; font-weight: 500; letter-spacing: -0.014em; margin: 0 0 24px;
}
.cs-split-list { list-style: none; padding: 0; margin: 0; }
.cs-split-list li {
  padding: 14px 0;
  border-top: 1px solid var(--line);
  font-size: 14.5px;
  color: var(--ink-2);
  display: grid; grid-template-columns: 28px 1fr; gap: 12px;
  align-items: baseline;
}
.cs-split-list li:first-child { border-top: 0; padding-top: 0; }
.cs-split-list li b {
  font-family: var(--font-mono); font-size: 10.5px; color: var(--ink-4);
  font-weight: 500;
}

/* Dark band — Solution */
.cs-dark {
  background: #0E0E0F;
  color: #EAEAE5;
}
.cs-dark .cs-section-num strong { color: #fff; }
.cs-dark .cs-section-num { color: #88887F; }
.cs-dark .cs-section-title { color: #fff; }
.cs-dark .cs-section-title em { color: #88887F; }
.cs-dark .cs-split-list li { border-top-color: #2A2A28; color: #C5C5BC; }
.cs-dark .cs-split-list li b { color: #7E7E72; }
.cs-dark .cs-split-side { color: #7E7E72; }

.cs-solutions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: #2A2A28;
  border: 1px solid #2A2A28;
  border-radius: 8px;
  overflow: hidden;
  margin-top: 24px;
}
.cs-sol-cell {
  background: #161615;
  padding: 28px 24px;
  display: flex; flex-direction: column; gap: 12px;
}
.cs-sol-num {
  font-family: var(--font-mono); font-size: 10.5px;
  color: #6FA487; letter-spacing: 0.06em;
}
.cs-sol-title { font-size: 18px; font-weight: 500; letter-spacing: -0.012em; color: #fff; }
.cs-sol-body { font-size: 13.5px; line-height: 1.55; color: #A8A89E; }

/* Role + IA */
.cs-role-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.cs-role-list {
  list-style: none; padding: 0; margin: 0;
  border-top: 1px solid var(--line);
}
.cs-role-list li {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  display: grid; grid-template-columns: 32px 1fr auto; gap: 12px;
  align-items: baseline;
}
.cs-role-list li b { font-family: var(--font-mono); font-size: 10.5px; color: var(--ink-4); }
.cs-role-list li span { font-size: 15px; }
.cs-role-list li i {
  font-style: normal; font-family: var(--font-mono); font-size: 11px; color: var(--ink-3);
}

/* Product areas grid */
.cs-areas {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.cs-area {
  padding: 24px 22px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  display: flex; flex-direction: column; gap: 10px;
  min-height: 180px;
}
.cs-area-num {
  font-family: var(--font-mono); font-size: 10.5px; color: var(--ink-4);
  letter-spacing: 0.06em;
}
.cs-area-title { font-size: 16px; font-weight: 500; letter-spacing: -0.01em; }
.cs-area-body { font-size: 13px; color: var(--ink-3); line-height: 1.5; }
.cs-area-link {
  margin-top: auto;
  font-family: var(--font-mono); font-size: 11px; color: var(--accent);
  text-decoration: none;
  display: inline-flex; align-items: center; gap: 4px;
}
.cs-area-link:hover { color: var(--accent-2); }
.cs-area-tag {
  position: absolute;
}

@media (max-width: 1000px) { .cs-areas { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px)  { .cs-areas { grid-template-columns: 1fr; } }

/* Workflow ribbon */
.cs-flow {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--surface);
}
.cs-flow-step {
  padding: 22px 18px;
  border-right: 1px solid var(--line);
  position: relative;
  display: flex; flex-direction: column; gap: 8px;
  min-height: 140px;
}
.cs-flow-step:last-child { border-right: 0; }
.cs-flow-num { font-family: var(--font-mono); font-size: 10.5px; color: var(--accent); letter-spacing: 0.06em; }
.cs-flow-title { font-size: 14px; font-weight: 500; }
.cs-flow-body { font-size: 12px; color: var(--ink-3); line-height: 1.5; }

@media (max-width: 1000px) { .cs-flow { grid-template-columns: repeat(2, 1fr); } .cs-flow-step:nth-child(2n) { border-right: 0; } }

/* Principles — editorial 2-col */
.cs-principles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 64px;
}
.cs-principle {
  padding: 28px 0;
  border-top: 1px solid var(--line);
  display: grid; grid-template-columns: 60px 1fr; gap: 24px;
}
.cs-principle-num { font-family: var(--font-mono); font-size: 11px; color: var(--ink-4); }
.cs-principle h4 { font-size: 18px; font-weight: 500; letter-spacing: -0.012em; margin: 0 0 8px; }
.cs-principle p { font-size: 13.5px; color: var(--ink-3); margin: 0; line-height: 1.55; }

@media (max-width: 760px) { .cs-principles { grid-template-columns: 1fr; } }

/* Outcomes — large numbers */
.cs-outcomes {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid #2A2A28;
  border-bottom: 1px solid #2A2A28;
}
.cs-outcome {
  padding: 32px 24px;
  border-right: 1px solid #2A2A28;
}
.cs-outcome:last-child { border-right: 0; }
.cs-outcome-val {
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1;
  color: #fff;
  margin-bottom: 12px;
}
.cs-outcome-val span { color: #6FA487; }
.cs-outcome-label {
  font-size: 13px; color: #A8A89E;
  line-height: 1.5;
}
.cs-outcome-foot {
  margin-top: 16px;
  font-family: var(--font-mono); font-size: 10.5px;
  color: #6E6E66;
}

@media (max-width: 900px) {
  .cs-outcomes { grid-template-columns: repeat(2, 1fr); }
  .cs-outcome:nth-child(2n) { border-right: 0; }
}

/* Preview tiles */
.cs-previews {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.cs-preview {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--surface);
  text-decoration: none; color: inherit;
  display: flex; flex-direction: column;
  transition: border-color 120ms ease, transform 120ms ease;
}
.cs-preview:hover { border-color: var(--ink-4); }
.cs-preview-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-tint);
}
.cs-preview-bar .url { font-family: var(--font-mono); font-size: 10.5px; color: var(--ink-4); }
.cs-preview-img {
  position: relative;
  height: 280px;
  background: var(--bg-2);
  overflow: hidden;
}
.cs-preview-img iframe {
  width: 200%; height: 200%;
  transform: scale(0.5);
  transform-origin: 0 0;
  border: 0;
  pointer-events: none;
}
.cs-preview-meta {
  padding: 18px 18px 20px;
  display: flex; flex-direction: column; gap: 4px;
}
.cs-preview-num { font-family: var(--font-mono); font-size: 10.5px; color: var(--ink-4); letter-spacing: 0.06em; }
.cs-preview-title { font-size: 16px; font-weight: 500; letter-spacing: -0.01em; }
.cs-preview-body { font-size: 12.5px; color: var(--ink-3); line-height: 1.5; margin-top: 4px; }
.cs-preview-cta {
  margin-top: 14px;
  font-family: var(--font-mono); font-size: 11px;
  color: var(--accent);
  display: inline-flex; align-items: center; gap: 4px;
}

@media (max-width: 760px) { .cs-previews { grid-template-columns: 1fr; } }

/* Footer */
.cs-foot {
  border-top: 1px solid var(--line);
  padding: 40px var(--cs-px);
  display: flex; align-items: center; gap: 24px;
  font-size: 12px; color: var(--ink-4);
  font-family: var(--font-mono);
}
.cs-foot-cta { margin-left: auto; }


.preview-iframe {
  width: 1440px;
  height: 760px;
  border: 0;
  transform: scale(0.79);
  transform-origin: 0 0;
}