/* ==========================================================================
   CASE STUDY PAGES — extends styles.css
   ========================================================================== */

.case {
  max-width: 880px;
  margin: 0 auto;
  padding: clamp(60px, 10vw, 120px) var(--gutter) 60px;
}

.case-hero {
  margin-bottom: clamp(80px, 10vw, 140px);
  padding-bottom: 60px;
  border-bottom: 1px solid var(--rule-light);
}

.back-link {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  display: inline-block;
  margin-bottom: 60px;
  transition: color 0.2s;
}

.back-link:hover { color: var(--accent); }

.case-kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--accent);
  display: block;
  margin-bottom: 32px;
}

.case-h1 {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(48px, 8vw, 96px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: 32px;
}

.case-h1 em {
  color: var(--accent);
  font-weight: 600;
}

.case-subtitle {
  font-size: clamp(18px, 1.6vw, 24px);
  line-height: 1.45;
  color: var(--ink-soft);
  max-width: 700px;
  margin-bottom: 60px;
}

.case-spec {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 24px 0;
  border-top: 1px solid var(--rule-light);
}

.case-spec > div {
  border-left: 1px solid var(--rule-light);
  padding-left: 16px;
}

.case-spec > div:first-child {
  border-left: none;
  padding-left: 0;
}

.case-spec dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.case-spec dd {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* CASE SECTIONS */
.case-section {
  margin-bottom: clamp(60px, 8vw, 100px);
}

.case-section-head {
  margin-bottom: 32px;
}

.case-num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--accent);
  display: block;
  margin-bottom: 12px;
}

.case-section-head h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.case-body p {
  font-size: clamp(16px, 1.2vw, 18px);
  line-height: 1.7;
  margin-bottom: 20px;
  color: var(--ink-soft);
}

.case-bullets {
  list-style: none;
  padding: 0;
  margin: 24px 0;
  border-top: 1px solid var(--rule-light);
}

.case-bullets li {
  padding: 18px 0;
  border-bottom: 1px solid var(--rule-light);
  font-size: 16px;
  line-height: 1.55;
}

.case-bullets strong {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 17px;
  display: inline-block;
  margin-right: 8px;
  color: var(--ink);
}

/* PLACEHOLDER NOTES */
.case-placeholder-note {
  background: rgba(255, 77, 46, 0.08);
  border-left: 3px solid var(--accent);
  padding: 16px 20px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.55;
  color: var(--accent-deep);
  font-style: normal;
  margin-bottom: 24px;
}

/* ARTIFACTS */
.case-artifact {
  margin: 32px 0;
}

.artifact-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
  display: block;
  margin-bottom: 12px;
}

.artifact-placeholder {
  background: var(--paper);
  border: 1px dashed var(--rule-light);
  padding: 60px 40px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  line-height: 1.6;
}

/* METRICS */
.case-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 32px 0;
}

.metric {
  background: var(--paper);
  border: 1px solid var(--rule-light);
  padding: 24px;
  position: relative;
}

.metric::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--accent);
}

.metric-num {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 36px;
  line-height: 1;
  letter-spacing: -0.02em;
  display: block;
  margin-bottom: 8px;
}

.metric-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--muted);
  text-transform: uppercase;
  line-height: 1.4;
}

/* NEXT NAV */
.case-next {
  margin-top: clamp(80px, 10vw, 140px);
  padding-top: 40px;
  border-top: 1px solid var(--rule-light);
}

.next-link {
  display: block;
  padding: 32px;
  background: var(--ink);
  color: var(--bone);
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.next-link:hover {
  background: var(--accent);
  transform: translate(-4px, -4px);
  box-shadow: 8px 8px 0 var(--ink);
}

.next-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-light);
  display: block;
  margin-bottom: 12px;
}

.next-link:hover .next-label {
  color: var(--ink);
}

.next-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(22px, 2.5vw, 32px);
  letter-spacing: -0.02em;
  display: block;
}

/* RESPONSIVE */
@media (max-width: 720px) {
  .case-spec {
    grid-template-columns: repeat(2, 1fr);
  }
  .case-metrics {
    grid-template-columns: 1fr;
  }
}