:root {
  --ink: #111;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #0b6efd;
  --bg: #ffffff;
  --soft: #f3f4f6;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-feature-settings: 'cv11', 'ss01';
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 96px 32px 128px;
}
.name {
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 24px;
}
.eyebrow {
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.eyebrow a {
  color: var(--muted);
  text-decoration: none;
}
.eyebrow a:hover { color: var(--ink); }
h1 {
  font-size: 44px;
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 600;
  margin: 0 0 20px;
}
.sub {
  font-size: 19px;
  color: var(--muted);
  margin: 0 0 64px;
  max-width: 620px;
}
h2 {
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 64px 0 16px;
  font-weight: 500;
}
p { margin: 0 0 16px; }
ol, ul {
  padding: 0;
  margin: 0;
  list-style: none;
}
ol li, ul li {
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
ol li:last-child, ul li:last-child {
  border-bottom: 1px solid var(--line);
}
ol { counter-reset: step; }
ol li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 16px;
}
ol li::before {
  content: counter(step);
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  padding-top: 2px;
}
.step-title {
  font-weight: 600;
  margin: 0 0 4px;
}
.step-body {
  color: var(--muted);
  margin: 0;
}
.impact {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin: 16px 0 0;
  padding: 32px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.impact .num {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  margin: 0 0 6px;
}
.impact .lbl {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.4;
}
.note {
  font-size: 13px;
  color: var(--muted);
  margin-top: 16px;
}
.stack {
  font-size: 14px;
  color: var(--muted);
}
.stack code {
  font-family: inherit;
  background: var(--soft);
  padding: 3px 8px;
  border-radius: 4px;
  margin: 0 4px 6px 0;
  display: inline-block;
  color: var(--ink);
  font-size: 13px;
}
.cta {
  margin-top: 80px;
  padding-top: 48px;
  border-top: 1px solid var(--line);
}
.cta p {
  font-size: 18px;
  margin: 0 0 20px;
}
.cta a.btn {
  display: inline-block;
  background: var(--ink);
  color: white;
  text-decoration: none;
  padding: 12px 22px;
  border-radius: 6px;
  font-weight: 500;
  font-size: 15px;
  margin-right: 8px;
}
.cta a.btn:hover { background: var(--accent); }
.cta a.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.cta a.btn-ghost:hover {
  background: var(--soft);
  border-color: var(--ink);
}
footer {
  margin-top: 96px;
  font-size: 13px;
  color: var(--muted);
}
/* Root index list */
.case-title {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 4px;
  transition: color .15s;
}
.case-sub {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}
ul.cases li a {
  color: var(--ink);
  text-decoration: none;
  display: block;
}
ul.cases li a:hover .case-title { color: var(--accent); }
.contact {
  margin-top: 64px;
  font-size: 14px;
  color: var(--muted);
}
.contact a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}
@media (max-width: 600px) {
  main { padding: 56px 24px 80px; }
  h1 { font-size: 32px; }
  .sub { font-size: 17px; margin-bottom: 48px; }
  .impact { grid-template-columns: 1fr; gap: 24px; }
}