:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b6b6b;
  --rule: #e6e6e6;
  --accent: #8c4ed3;
  --card: #fafafa;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131316;
    --fg: #e8e8ea;
    --muted: #9a9aa2;
    --rule: #2a2a30;
    --accent: #a97ce0;
    --card: #1a1a1f;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.site-header {
  padding: 40px 0 0;
}

.site-header .wrap {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
}

.site-nav a {
  font-size: 15px;
  color: var(--muted);
}

.site-nav a:hover { color: var(--accent); text-decoration: none; }

.site-nav a[aria-current="page"] { color: var(--fg); }

.wordmark {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--fg);
}
.wordmark:hover { text-decoration: none; }

/* Intro */
.intro {
  padding: 72px 0 64px;
  border-bottom: 1px solid var(--rule);
}

.intro h1 {
  margin: 0 0 24px;
  font-size: 34px;
  line-height: 1.25;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.intro p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 18px;
}

.intro p:last-child { margin-bottom: 0; }

.intro strong { color: var(--fg); font-weight: 600; }

/* Inner page */
.page { padding: 72px 0 80px; }

.page h1 {
  margin: 0 0 28px;
  font-size: 28px;
  line-height: 1.3;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.page p { margin: 0 0 18px; }

@media (max-width: 600px) {
  .page { padding: 48px 0 56px; }
  .page h1 { font-size: 24px; }
}

/* Section */
section { padding: 56px 0; }

h2 {
  margin: 0 0 32px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

/* Products */
.product {
  padding: 26px 0;
  border-top: 1px solid var(--rule);
}
.product:first-of-type { border-top: none; padding-top: 0; }

.product-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 10px;
}

.product h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.tag {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  border: 1px solid var(--rule);
  border-radius: 20px;
  padding: 2px 9px;
}

.product p {
  margin: 0 0 14px;
  color: var(--muted);
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 15px;
}

/* Sub-projects nested under a product */
.subs {
  margin-top: 24px;
  padding-left: 20px;
  border-left: 2px solid var(--rule);
}

.subs-label {
  margin: 0 0 16px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.sub { margin-bottom: 20px; }
.sub:last-child { margin-bottom: 0; }

.sub h4 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.sub p {
  margin: 0 0 8px;
  font-size: 15px;
  color: var(--muted);
}

.sub .links { font-size: 14px; gap: 14px; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--rule);
  padding: 32px 0 56px;
  font-size: 14px;
  color: var(--muted);
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: baseline;
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  .intro { padding: 48px 0 44px; }
  .intro h1 { font-size: 27px; }
  .intro p { font-size: 17px; }
  section { padding: 44px 0; }
}

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1px 5px;
}