/* =========================================================================
   Case study layout — shared across all four studies.
   Same token system: white canvas, Inter, single Rausch accent, hairlines.
   ========================================================================= */

/* ---------- Case hero ---------- */
.cs-hero { padding: clamp(40px, 7vh, 84px) 0 clamp(36px, 5vh, 56px); }
.cs-back { display: inline-flex; align-items: center; gap: 8px; font: var(--type-button-sm); color: var(--color-muted); margin-bottom: clamp(28px,5vh,52px); transition: color var(--dur-hover) var(--ease-out); }
.cs-back:hover { color: var(--color-ink); }
.cs-back svg { transition: transform var(--dur-hover) var(--ease-out); }
.cs-back:hover svg { transform: translateX(-3px); }

.cs-kicker { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 22px; }
.cs-kicker .tag { font: 600 11px/1 var(--font-sans); letter-spacing:.03em; color: var(--color-body); padding: 7px 12px; border-radius: var(--radius-full); background: var(--color-surface-soft); white-space: nowrap; }
.cs-kicker .tag.accent { background: var(--color-primary); color: #fff; }

.cs-hero h1 { font: 600 clamp(34px, 5.2vw, 68px)/1.02 var(--font-sans); letter-spacing: -0.03em; margin: 0; max-width: 20ch; color: var(--color-ink); }
.cs-hero .cs-lede { margin: 24px 0 0; max-width: 56ch; font-size: clamp(17px, 1.5vw, 21px); line-height: 1.55; color: var(--color-body); }

/* outcome / impact pair */
.cs-outcomes { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--color-hairline-soft); border: 1px solid var(--color-hairline-soft); border-radius: var(--radius-md); overflow: hidden; margin-top: clamp(32px, 5vh, 52px); }
.cs-outcome { background: #fff; padding: 30px 30px 28px; }
.cs-outcome .k { font: var(--type-micro-label); letter-spacing: .1em; text-transform: uppercase; color: var(--color-muted-soft); }
.cs-outcome .v { margin-top: 14px; font: 600 clamp(20px, 2.2vw, 28px)/1.2 var(--font-sans); letter-spacing: -0.02em; color: var(--color-ink); }
.cs-outcome .v strong { color: var(--color-primary); font-weight: 700; }
@media (max-width: 680px){ .cs-outcomes { grid-template-columns: 1fr; } }

.cs-hero-plate { margin-top: clamp(36px, 6vh, 64px); }
.cs-hero-plate .plate { aspect-ratio: 16 / 8.4; }

/* ---------- Section scaffolding ---------- */
.cs-section { padding: clamp(44px, 7vh, 80px) 0; border-top: 1px solid var(--color-hairline-soft); }
.cs-section.no-rule { border-top: 0; }
.cs-grid { display: grid; grid-template-columns: 280px 1fr; gap: clamp(28px, 5vw, 72px); align-items: start; }
@media (max-width: 860px){ .cs-grid { grid-template-columns: 1fr; gap: 20px; } }
.cs-aside { position: sticky; top: 96px; }
@media (max-width: 860px){ .cs-aside { position: static; } }
.cs-aside .eyebrow { margin-bottom: 16px; }
.cs-aside h2 { font: 600 clamp(24px, 2.6vw, 34px)/1.08 var(--font-sans); letter-spacing: -0.02em; margin: 0; }
.cs-aside .aside-note { margin-top: 14px; color: var(--color-muted); font: var(--type-body-sm); max-width: 30ch; }

.cs-body > * + * { margin-top: 20px; }
.cs-body p { color: var(--color-body); font: var(--type-body-md); font-size: clamp(16px, 1.2vw, 17px); line-height: 1.62; max-width: 64ch; }
.cs-body p b, .cs-body strong { color: var(--color-ink); font-weight: 600; }
.cs-body h3 { font: 600 18px/1.3 var(--font-sans); color: var(--color-ink); margin-top: 28px; }

/* bullet list */
.cs-list { list-style: none; margin: 6px 0 0; padding: 0; max-width: 64ch; }
.cs-list li { position: relative; padding-left: 26px; color: var(--color-body); font-size: clamp(16px,1.2vw,17px); line-height: 1.55; }
.cs-list li + li { margin-top: 12px; }
.cs-list li::before { content: ""; position: absolute; left: 4px; top: 9px; width: 7px; height: 7px; border-radius: 50%; background: var(--color-primary); }
.cs-list.check li::before { content: ""; left: 2px; top: 4px; width: 13px; height: 8px; border-radius: 0; background: transparent; border-left: 2px solid var(--color-primary); border-bottom: 2px solid var(--color-primary); transform: rotate(-45deg); }

/* KPI / metric strip */
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--color-hairline-soft); border: 1px solid var(--color-hairline-soft); border-radius: var(--radius-md); overflow: hidden; margin-top: 8px; }
.kpi { background: #fff; padding: 26px 22px; }
.kpi .v { font: 700 clamp(28px, 3vw, 40px)/1 var(--font-sans); letter-spacing: -0.03em; color: var(--color-ink); }
.kpi .v.accent { color: var(--color-primary); }
.kpi .k { margin-top: 10px; font: var(--type-caption-sm); color: var(--color-muted); }
@media (max-width: 720px){ .kpi-grid { grid-template-columns: repeat(2, 1fr); } }

/* stat chips inline (workshop facts) */
.chip-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 4px; }
.chip { border: 1px solid var(--color-hairline); border-radius: var(--radius-md); padding: 18px 22px; min-width: 130px; }
.chip .v { font: 700 clamp(24px,2.4vw,30px)/1 var(--font-sans); letter-spacing:-0.02em; }
.chip .k { margin-top: 8px; font: var(--type-caption-sm); color: var(--color-muted); }

/* figure / placeholder plate */
.cs-figure { margin-top: 8px; }
.cs-figure .plate { aspect-ratio: 16 / 9; }
.cs-figure.tall .plate { aspect-ratio: 16 / 11; }
.cs-figure figcaption { margin-top: 12px; font: var(--type-caption-sm); color: var(--color-muted); }
.cs-figcols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 680px){ .cs-figcols { grid-template-columns: 1fr; } }

/* drag-and-drop image slots (replace placeholder plates) */
.plate-slot { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; }
.cs-figure .plate-slot { height: auto; aspect-ratio: 16 / 9; }
.cs-figure.tall .plate-slot { aspect-ratio: 16 / 11; }
.cs-hero-plate .plate-slot { aspect-ratio: 16 / 8.4; }

/* pull quote */
.cs-quote { border-left: 2px solid var(--color-primary); padding-left: 24px; margin: 8px 0; }
.cs-quote p { font: 500 clamp(20px, 2.2vw, 27px)/1.32 var(--font-sans); letter-spacing: -0.01em; color: var(--color-ink); max-width: 30ch; }
.cs-quote .by { margin-top: 14px; font: var(--type-body-sm); color: var(--color-muted); }

/* two-up HMW / contrast cards */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 680px){ .duo { grid-template-columns: 1fr; } }
.duo .card2 { border: 1px solid var(--color-hairline); border-radius: var(--radius-md); padding: 26px; }
.duo .card2 .lab { font: var(--type-micro-label); letter-spacing: .08em; text-transform: uppercase; color: var(--color-primary); }
.duo .card2 p { margin: 12px 0 0; font: 500 18px/1.35 var(--font-sans); color: var(--color-ink); }

/* process step rail */
.steps { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 6px; }
.steps .step { display: inline-flex; align-items: center; gap: 10px; border: 1px solid var(--color-hairline); border-radius: var(--radius-full); padding: 10px 16px 10px 12px; }
.steps .step .n { width: 22px; height: 22px; border-radius: 50%; background: var(--color-ink); color: #fff; font: 700 11px/22px var(--font-sans); text-align: center; }
.steps .step span { font: var(--type-button-sm); color: var(--color-ink); }

/* note / assumption banner */
.cs-note { display: flex; gap: 12px; align-items: flex-start; background: var(--color-surface-soft); border-radius: var(--radius-md); padding: 18px 20px; margin-top: 8px; }
.cs-note svg { flex: none; color: var(--color-muted); margin-top: 1px; }
.cs-note p { margin: 0; font: var(--type-body-sm); color: var(--color-muted); max-width: none; }

/* ---------- Prev / next + contact ---------- */
.cs-next { border-top: 1px solid var(--color-ink); padding: clamp(40px,6vh,72px) 0; }
.cs-next a { display: flex; justify-content: space-between; align-items: center; gap: 20px; text-decoration: none; }
.cs-next .lab { font: var(--type-micro-label); letter-spacing: .1em; text-transform: uppercase; color: var(--color-muted-soft); }
.cs-next h3 { font: 600 clamp(26px, 3.4vw, 44px)/1.05 var(--font-sans); letter-spacing: -0.025em; margin: 14px 0 0; transition: color var(--dur-hover) var(--ease-out); }
.cs-next a:hover h3 { color: var(--color-primary); }
.cs-next .np-arrow { color: var(--color-ink); flex: none; }