/* ============================================================
   Case study — shared design system
   Loaded after style.css, which provides the site header/footer
   shell. Each case-study page sets its own palette + accent
   tokens and its unique hero "signature" element inline in a
   <style> block; everything structural lives here.
   Accent tokens each page must define:
     --accent-deep  eyebrow, decision labels, focus ring
     --accent-step  process step numbers
     --accent-glow  impact kicker (on the dark panel)
   Palette tokens each page must define:
     --paper --paper-2 --ink --ink-soft --paper-soft --mist --line
   ============================================================ */

:root {
  --measure: 42rem; /* readable column for long-form prose */
}

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-size: 1.0625rem;
  line-height: 1.7;
  letter-spacing: -0.005em;
}

/* Match the home page container width + side padding */
.wrap { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--side-padding); }
.measure { max-width: var(--measure); }

/* Hero (namespaced .cs-hero to avoid the home page's .hero layout) */
.cs-hero { padding: 5.5rem 0 4rem; position: relative; overflow: hidden; }
.eyebrow {
  font-size: 0.74rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.22em; color: var(--accent-deep); margin: 0 0 1.4rem;
}
.hero-title {
  font-weight: 800;
  font-size: clamp(3.4rem, 11vw, 7rem); line-height: 0.95; letter-spacing: -0.02em;
  margin: 0 0 1.4rem;
}
.hero-lede {
  font-size: clamp(1.15rem, 2.4vw, 1.4rem); line-height: 1.5;
  color: var(--ink); max-width: 36rem; margin: 0 0 2rem;
}
.hero-role { font-size: 0.9rem; color: var(--mist); letter-spacing: 0.01em; }
.hero-role strong { color: var(--ink); font-weight: 600; }

/* Section scaffolding */
section { padding: 3.25rem 0; }
.rule { border: 0; border-top: 1px solid var(--line); margin: 0; }
.kicker {
  font-size: 0.74rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.18em; color: var(--mist); margin: 0 0 1.1rem;
}
main h2 {
  font-weight: 700;
  font-size: clamp(1.7rem, 4vw, 2.5rem); line-height: 1.08; letter-spacing: -0.02em;
  margin: 0 0 1.25rem;
}
main h3 {
  font-weight: 700;
  font-size: 1.2rem; line-height: 1.3; letter-spacing: -0.01em; margin: 0 0 .4rem;
}
main p { margin: 0 0 1.15rem; }
main p:last-child { margin-bottom: 0; }
.lead { font-size: 1.2rem; line-height: 1.6; }

/* At-a-glance meta grid */
.meta { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.75rem 2.5rem; padding: 2.25rem 0; }
.meta dt { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--mist); margin-bottom: .45rem; }
.meta dd { margin: 0; font-size: 0.98rem; line-height: 1.55; }
.meta a { color: var(--accent-deep); }
@media (min-width: 680px) { .meta { grid-template-columns: repeat(4, 1fr); } }

/* Process steps */
.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; }
.step { display: grid; grid-template-columns: 2.5rem 1fr; gap: 1.25rem; padding: 1.5rem 0; border-top: 1px solid var(--line); }
.step:first-child { border-top: 0; }
.step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  font-weight: 700; font-size: 1.05rem; color: var(--accent-step); padding-top: .1rem;
}
.step h3 { margin-bottom: .35rem; }
.step p { margin: 0; color: var(--ink-soft); }

/* Key decisions */
.decision { padding: 1.75rem 0; border-top: 1px solid var(--line); }
.decision:first-of-type { border-top: 0; }
.decision .why { color: var(--ink-soft); }
.decision .label {
  display: inline-block; font-size: 0.72rem; font-weight: 600; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--accent-deep); margin-bottom: .55rem;
}

/* Impact (dark panel) */
.impact { background: var(--ink); color: var(--paper); border-radius: 1rem; padding: 2.75rem 2rem; }
.impact .kicker { color: var(--accent-glow); }
.impact h2 { color: var(--paper); }

/* Impact — stats variant */
.stats { display: grid; grid-template-columns: 1fr; gap: 1.5rem; margin-top: 1.75rem; }
@media (min-width: 680px) { .stats { grid-template-columns: repeat(3, 1fr); } }
.stat { border-top: 1px solid color-mix(in srgb, var(--paper) 22%, transparent); padding-top: 1rem; }
.stat .n { font-weight: 800; font-size: 2rem; line-height: 1; letter-spacing: -0.02em; }
.stat .l { font-size: 0.86rem; color: var(--paper-soft); margin-top: .5rem; }

/* Impact — outcomes variant */
.outcomes { display: grid; grid-template-columns: 1fr; gap: 1.25rem; margin-top: 1.75rem; }
@media (min-width: 680px) { .outcomes { grid-template-columns: repeat(2, 1fr); } }
.outcome { border-top: 1px solid color-mix(in srgb, var(--paper) 22%, transparent); padding-top: 1rem; }
.outcome .t { font-weight: 700; font-size: 1.15rem; line-height: 1.2; letter-spacing: -0.01em; }
.outcome .d { font-size: 0.9rem; color: var(--paper-soft); margin-top: .4rem; }

/* Figures / image placeholders — swap the .shot blocks for <img> later */
figure { margin: 2rem 0; }
.shot {
  border: 1px dashed var(--mist); border-radius: .75rem; background: var(--paper-2);
  aspect-ratio: 16 / 9; display: flex; align-items: center; justify-content: center;
  text-align: center; padding: 1.5rem; color: var(--mist);
}
.shot.tall { aspect-ratio: 4 / 3; }
.shot span { font-size: 0.85rem; max-width: 22rem; line-height: 1.5; }
.shot span strong { color: var(--ink); font-weight: 600; display: block; margin-bottom: .25rem; }
figcaption { font-size: 0.82rem; color: var(--mist); margin-top: .7rem; }
.pair { display: grid; grid-template-columns: 1fr; gap: 1.25rem; }
@media (min-width: 680px) { .pair { grid-template-columns: 1fr 1fr; } }

/* Focus + reduced motion */
main a:focus-visible { outline: 2px solid var(--accent-deep); outline-offset: 3px; border-radius: 2px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }