/* ============================================================
   Case study shared styles
   ============================================================ */

.cs-hero {
  padding: 168px 0 80px;
  border-top: 0;
  position: relative;
}
.cs-hero .breadcrumb {
  font-family: var(--font-mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 32px;
  display: flex;
  gap: 10px;
}
.cs-hero .breadcrumb a { color: var(--text-muted); text-decoration: none; }
.cs-hero .breadcrumb a:hover { color: var(--accent); }
.cs-hero h1 {
  font-size: clamp(40px, 6vw, 88px);
  font-weight: 300;
  letter-spacing: -0.035em;
  line-height: 0.98;
  max-width: 16ch;
}
.cs-hero h1 em { font-family: var(--font-serif); color: var(--accent); }
.cs-hero .summary {
  margin-top: 32px;
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.5;
  color: var(--text-muted);
  max-width: 56ch;
}

.cs-meta {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
@media (max-width: 980px) { .cs-meta { grid-template-columns: repeat(2, 1fr); } }
.cs-meta .cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.cs-meta .cell .label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}
.cs-meta .cell .value {
  font-size: 14px;
  color: var(--text);
  line-height: 1.4;
}

/* Big visual */
.cs-visual {
  margin: 0 0 80px;
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background:
    repeating-linear-gradient(135deg, transparent 0 11px, color-mix(in oklab, var(--text) 4%, transparent) 11px 12px),
    var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.cs-visual.diagram {
  background: var(--bg-elevated);
  aspect-ratio: 16 / 8;
  padding: 32px;
}
.cs-visual .visual-label {
  position: absolute; top: 18px; left: 24px;
  font-family: var(--font-mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-dim);
}
.cs-visual .visual-id {
  position: absolute; top: 18px; right: 24px;
  font-family: var(--font-mono); font-size: 11px; color: var(--text-dim);
}
.cs-visual .caption {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--text-muted); text-align: center;
  padding: 8px 16px; max-width: 80%; line-height: 1.5;
}

/* Body grid */
.cs-body-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 64px;
  align-items: start;
}
@media (max-width: 980px) { .cs-body-grid { grid-template-columns: 1fr; gap: 24px; } }
.cs-body-grid .side {
  position: sticky; top: 96px;
}
.cs-body-grid .side .label {
  font-family: var(--font-mono); font-size: 11px; color: var(--text-dim);
  letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 14px;
}
.cs-body-grid .side h3 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 300; letter-spacing: -0.025em; line-height: 1.05;
}
.cs-body-grid .body p {
  font-size: clamp(17px, 1.4vw, 20px);
  line-height: 1.55; color: var(--text);
  margin-bottom: 22px; font-weight: 300; letter-spacing: -0.005em;
}
.cs-body-grid .body p strong { color: var(--text); font-weight: 500; }
.cs-body-grid .body p em { font-family: var(--font-serif); color: var(--accent); font-weight: 400; }
.cs-body-grid .body ul {
  list-style: none; margin: 0 0 22px;
  border-top: 1px solid var(--border);
}
.cs-body-grid .body ul li {
  padding: 14px 0; border-bottom: 1px solid var(--border);
  font-size: 16px; color: var(--text); line-height: 1.5;
  display: grid; grid-template-columns: 32px 1fr; gap: 14px; align-items: baseline;
}
.cs-body-grid .body ul li::before {
  content: counter(li, decimal-leading-zero);
  counter-increment: li;
  font-family: var(--font-mono); font-size: 11px;
  color: var(--text-dim); letter-spacing: 0.04em;
}
.cs-body-grid .body ul { counter-reset: li; }
.cs-body-grid .body ul li small {
  display: block; color: var(--text-muted); margin-top: 4px;
  font-size: 13.5px; line-height: 1.5;
}

/* Quote */
.cs-quote {
  margin: 64px 0;
  padding: 56px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg-elevated) 60%, transparent);
  position: relative;
}
.cs-quote q {
  font-size: clamp(22px, 2.4vw, 32px);
  font-weight: 300; letter-spacing: -0.02em; line-height: 1.3;
  display: block; quotes: none;
}
.cs-quote q::before, .cs-quote q::after { content: ""; }
.cs-quote .attr {
  font-family: var(--font-mono); font-size: 11px; color: var(--text-dim);
  letter-spacing: 0.06em; margin-top: 28px; text-transform: uppercase;
}

/* Diagram sections */
.cs-diagram-section { margin: 80px 0; }
.cs-diagram-section .head {
  display: grid; grid-template-columns: 1fr 2fr; gap: 40px;
  margin-bottom: 32px;
}
@media (max-width: 980px) { .cs-diagram-section .head { grid-template-columns: 1fr; } }
.cs-diagram-section .head .label {
  font-family: var(--font-mono); font-size: 11px; color: var(--text-dim);
  letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 10px;
}
.cs-diagram-section .head h3 {
  font-size: clamp(24px, 2.6vw, 32px); font-weight: 400;
  letter-spacing: -0.022em; line-height: 1.1;
}
.cs-diagram-section .head p {
  font-size: 16px; color: var(--text-muted); line-height: 1.55;
  margin-top: 14px; max-width: 62ch;
}

/* Outcome metrics */
.cs-outcomes {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  border-top: 1px solid var(--border-strong);
  border-bottom: 1px solid var(--border-strong);
}
@media (max-width: 980px) { .cs-outcomes { grid-template-columns: 1fr 1fr; } }
.cs-outcomes .metric {
  padding: 32px 24px;
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 10px;
}
.cs-outcomes .metric:last-child { border-right: 0; }
@media (max-width: 980px) {
  .cs-outcomes .metric:nth-child(2n) { border-right: 0; }
  .cs-outcomes .metric:nth-child(-n+2) { border-bottom: 1px solid var(--border); }
}
.cs-outcomes .metric .num {
  font-size: clamp(36px, 4vw, 56px); font-weight: 300;
  letter-spacing: -0.03em; line-height: 1; color: var(--text);
}
.cs-outcomes .metric .num em {
  font-family: var(--font-serif); color: var(--accent); font-style: normal;
}
.cs-outcomes .metric .label {
  font-family: var(--font-mono); font-size: 11px; color: var(--text-muted);
  letter-spacing: 0.06em; text-transform: uppercase;
}
.cs-outcomes .metric .note {
  font-size: 13px; color: var(--text-muted); line-height: 1.4;
}

/* Next */
.cs-next {
  border-top: 1px solid var(--border);
  margin-top: 80px; padding-top: 56px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 32px;
}
@media (max-width: 760px) { .cs-next { grid-template-columns: 1fr; } }
.cs-next a {
  text-decoration: none; color: var(--text);
  border: 1px solid var(--border); padding: 32px;
  display: flex; flex-direction: column; gap: 14px;
  transition: border-color 0.3s, padding 0.3s, color 0.3s;
}
.cs-next a:hover { border-color: var(--accent); padding-left: 40px; }
.cs-next a:hover h4 { color: var(--accent); }
.cs-next a .label {
  font-family: var(--font-mono); font-size: 11px; color: var(--text-dim);
  letter-spacing: 0.06em; text-transform: uppercase;
}
.cs-next a h4 { font-size: 22px; font-weight: 400; letter-spacing: -0.02em; transition: color 0.25s; }
.cs-next a .arrow {
  font-family: var(--font-mono); font-size: 16px; color: var(--text-dim);
  margin-top: auto;
}