*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg:             oklch(97% 0.008 85);
  --text:           oklch(16% 0.005 240);
  --text-mid:       oklch(36% 0.007 240);
  --text-secondary: oklch(48% 0.008 240);
  --text-tertiary:  oklch(64% 0.006 240);
  --rule:           oklch(89% 0.009 85);
  --accent:         oklch(52% 0.14 178);
  --accent-hover:   oklch(44% 0.14 178);
  --accent-dim:     oklch(52% 0.14 178 / 0.10);
  --dark-bg:        oklch(11% 0.008 240);
  --dark-rule:      oklch(22% 0.008 240);
  --dark-text:      oklch(93% 0.006 85);
  --dark-secondary: oklch(60% 0.006 240);
  --max-w:          760px;
  --nav-h:          60px;
  --pad:            clamp(24px, 5vw, 56px);
}
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
nav {
  position: sticky; top: 0; z-index: 100;
  background: var(--dark-bg);
  border-bottom: 1px solid var(--dark-rule);
  height: var(--nav-h);
  display: flex; align-items: center;
}
.nav-inner {
  max-width: 1020px; margin: 0 auto; padding: 0 var(--pad);
  width: 100%; display: flex; justify-content: space-between; align-items: center;
}
.nav-brand {
  display: flex; align-items: center; gap: 11px; text-decoration: none;
}
.nav-brand svg { width: 28px; height: 28px; }
.nav-brand-text {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 1.0625rem; font-weight: 400;
  color: var(--dark-text); letter-spacing: 0.02em;
}
.nav-back {
  font-size: 0.75rem; font-weight: 500;
  color: var(--dark-secondary); text-decoration: none;
  letter-spacing: 0.08em; text-transform: uppercase;
  transition: color 0.15s; display: flex; align-items: center; gap: 6px;
}
.nav-back:hover { color: var(--accent); }

/* CASE HEADER */
.case-header {
  background: var(--dark-bg);
  padding: clamp(72px, 10vw, 120px) var(--pad);
}
.case-header-inner { max-width: var(--max-w); margin: 0 auto; }
.case-tag {
  font-size: 0.6875rem; font-weight: 600;
  color: var(--accent); letter-spacing: 0.14em;
  text-transform: uppercase; margin-bottom: 20px;
}
.case-title {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 300; color: var(--dark-text);
  line-height: 1.05; letter-spacing: -0.03em;
  margin-bottom: 28px;
}
.case-summary {
  font-size: 1.125rem; color: var(--dark-secondary);
  line-height: 1.7; max-width: 620px;
}
.case-meta-bar {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--dark-rule);
  display: flex; gap: 48px; flex-wrap: wrap;
}
.case-meta-item { display: flex; flex-direction: column; gap: 4px; }
.case-meta-label {
  font-size: 0.625rem; font-weight: 600;
  color: oklch(45% 0.006 240); letter-spacing: 0.12em; text-transform: uppercase;
}
.case-meta-value { font-size: 0.9375rem; color: var(--dark-secondary); }

/* BODY */
.case-body {
  max-width: var(--max-w); margin: 0 auto;
  padding: clamp(72px, 10vw, 120px) var(--pad);
}
.case-section { margin-bottom: 72px; }
.case-section-label {
  font-size: 0.6875rem; font-weight: 600;
  color: var(--text-tertiary); letter-spacing: 0.14em;
  text-transform: uppercase; margin-bottom: 22px;
}
.case-section-heading {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: clamp(1.625rem, 3vw, 2.125rem);
  font-weight: 300; color: var(--text);
  line-height: 1.18; letter-spacing: -0.02em;
  margin-bottom: 28px;
  max-width: 640px;
}
.case-section-body {
  font-size: 1rem; color: var(--text-mid); line-height: 1.78;
}
.case-section-body p + p { margin-top: 18px; }
.case-section-body strong { color: var(--text); font-weight: 600; }

/* Figure (architecture diagram image) */
.case-figure {
  margin: 24px 0 40px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  overflow: hidden;
  background: oklch(95% 0.006 85);
}
.case-figure img {
  width: 100%; height: auto; display: block;
}
.case-figure figcaption {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  padding: 12px 18px;
  border-top: 1px solid var(--rule);
  font-style: italic;
  background: var(--bg);
}

/* Numbered list (architecture steps) */
.case-numbered {
  list-style: none;
  counter-reset: step;
  margin-top: 16px;
}
.case-numbered li {
  counter-increment: step;
  position: relative;
  padding-left: 56px;
  padding-bottom: 26px;
  color: var(--text-mid);
  font-size: 0.9375rem;
  line-height: 1.72;
}
.case-numbered li + li { padding-top: 26px; border-top: 1px solid var(--rule); }
.case-numbered li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0; top: 28px;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.04em;
}
.case-numbered li:first-child::before { top: 2px; }
.case-numbered li strong { color: var(--text); font-weight: 600; }

/* Inline code / technical labels */
.case-section-body code,
.case-numbered code {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.85em;
  background: var(--accent-dim);
  color: var(--text);
  padding: 2px 6px;
  border-radius: 2px;
}

/* Pull quote — for client-facing insight */
.case-pullquote {
  border-left: 2px solid var(--accent);
  padding: 8px 24px;
  margin: 32px 0;
  font-family: 'Crimson Pro', Georgia, serif;
  font-style: italic;
  font-size: 1.3125rem;
  font-weight: 300;
  line-height: 1.45;
  color: var(--text);
  max-width: 600px;
}

/* Stats */
.case-stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 0; margin: 24px 0 40px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  overflow: hidden;
}
.case-stat {
  padding: 32px 28px;
  border-left: 1px solid var(--rule);
  background: oklch(95% 0.006 85);
}
.case-stat:first-child { border-left: none; }
.case-stat-value {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: 2.25rem; font-weight: 300;
  color: var(--accent); line-height: 1; margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.case-stat-label {
  font-size: 0.8125rem; color: var(--text-mid); line-height: 1.5;
}

/* Tech stack chips */
.tech-chips {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin: 16px 0 8px;
}
.tech-chip {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--text-mid);
  background: var(--bg);
  border: 1px solid var(--rule);
  padding: 5px 10px;
  border-radius: 2px;
  letter-spacing: 0.02em;
}

/* Back CTA */
.case-back-cta {
  border-top: 1px solid var(--rule);
  padding-top: 48px; margin-top: 72px;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 20px;
}
.case-back-link {
  font-size: 0.8125rem; color: var(--text-secondary);
  text-decoration: none; letter-spacing: 0.05em;
  display: flex; align-items: center; gap: 8px;
  transition: color 0.15s;
}
.case-back-link:hover { color: var(--accent); }
.case-contact-link {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--accent); color: #fff;
  font-size: 0.8125rem; font-weight: 500;
  padding: 12px 24px; border-radius: 2px;
  text-decoration: none; letter-spacing: 0.02em;
  transition: background 0.15s;
}
.case-contact-link:hover { background: var(--accent-hover); }

footer {
  background: var(--dark-bg);
  border-top: 1px solid var(--dark-rule);
  padding: 36px 0;
}
.footer-inner {
  max-width: 1020px; margin: 0 auto; padding: 0 var(--pad);
  display: flex; justify-content: space-between; align-items: center;
}
.footer-copy { font-size: 0.75rem; color: oklch(30% 0.006 240); }
.footer-links { display: flex; gap: 24px; }
.footer-links a {
  font-size: 0.8125rem; color: var(--dark-secondary);
  text-decoration: none; transition: color 0.15s;
}
.footer-links a:hover { color: var(--dark-text); }

@media (max-width: 640px) {
  .case-meta-bar { gap: 24px; }
  .case-stats { grid-template-columns: 1fr; }
  .case-stat { border-left: none; border-top: 1px solid var(--rule); }
  .case-stat:first-child { border-top: none; }
  .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
  .case-numbered li { padding-left: 38px; }
}