/* ===== CASE STUDY SHARED STYLES ===== */
:root {
  --bg: #f6f8fb;
  --bg-alt: #eaeef4;
  --ink: #101827;
  --ink-soft: #364152;
  --ink-muted: #5f6b7d;
  --rule: #d5dce6;
  --accent: #1d5fd6;
  --accent-soft: #4d8bff;
  --paper: #ffffff;
  --band: #101827;
  --band-ink: #f6f8fb;
  --band-muted: rgba(246, 248, 251, 0.55);
  --band-rule: rgba(246, 248, 251, 0.16);
  --display: 'Sora', 'Helvetica Neue', Arial, sans-serif;
  --body: 'Manrope', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --max: 880px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--body);
  font-weight: 400;
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--ink);
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1px;
  transition: all 0.2s ease;
}
a:hover { border-bottom-color: var(--accent); }

.mono { font-family: var(--mono); }

/* ===== NAV ===== */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 248, 251, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}
.nav-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.25rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 2rem;
}
.nav-name {
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
  border: none;
}
.nav-name:hover { color: var(--accent); }
.nav-back {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--ink-soft);
  border: none;
  letter-spacing: 0.05em;
}
.nav-back:hover { color: var(--accent); }
.nav-name { white-space: nowrap; }
@media (max-width: 480px) {
  .nav-inner { padding: 1rem 1.25rem; gap: 1rem; }
}

/* ===== ARTICLE LAYOUT ===== */
article {
  max-width: var(--max);
  margin: 0 auto;
  padding: 5rem 2rem 6rem;
}

.case-eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-muted);
  margin-bottom: 1.5rem;
  display: flex;
  gap: 0.75rem;
  align-items: center;
}
.case-eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--ink-muted);
}

article h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 1.5rem;
}
article h1 em { color: var(--accent); font-weight: 700; }

.case-lede {
  font-family: var(--body);
  font-size: 1.25rem;
  line-height: 1.55;
  font-weight: 500;
  color: var(--ink-soft);
  margin-bottom: 3rem;
  max-width: 44ch;
}

/* Meta row under hero */
.case-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 2rem;
  padding: 2rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  margin-bottom: 4rem;
}
.case-meta-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-muted);
  margin-bottom: 0.4rem;
}
.case-meta-value { color: var(--ink); font-size: 0.95rem; }
.case-meta-value a { font-size: inherit; }

/* Body */
article h2 {
  font-size: 1.6rem;
  margin-top: 3.5rem;
  margin-bottom: 1.25rem;
}
article h3 {
  font-size: 1.2rem;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  color: var(--ink-soft);
}
article p {
  color: var(--ink-soft);
  margin-bottom: 1.5rem;
  max-width: 64ch;
}
article p strong { color: var(--ink); font-weight: 500; }
article ul {
  color: var(--ink-soft);
  margin-bottom: 1.5rem;
  padding-left: 1.25rem;
  max-width: 64ch;
}
article ul li { margin-bottom: 0.5rem; }

/* Pull-out fact */
.pullquote {
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.35rem;
  line-height: 1.45;
  color: var(--ink);
  border-left: 2px solid var(--accent);
  padding: 0.5rem 0 0.5rem 2rem;
  margin: 3rem 0;
  max-width: 50ch;
}

/* Inline code */
code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--bg-alt);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  color: var(--ink);
}

/* Footer nav between case studies */
.case-footer {
  max-width: var(--max);
  margin: 5rem auto 0;
  padding: 3rem 2rem;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}
.case-footer-link {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--ink);
  border: none;
}
.case-footer-link:hover { color: var(--accent); }
.case-footer-link .mono {
  display: block;
  font-style: normal;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-muted);
  margin-bottom: 0.25rem;
}

footer {
  background: var(--band);
  color: var(--band-muted);
  padding: 2rem;
  text-align: center;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  border-top: 1px solid var(--band-rule);
  margin-top: 5rem;
}