:root {
  --bg: #0b0d10;
  --bg-elevated: #14171b;
  --border: #22262b;
  --text: #e7e9ea;
  --text-muted: #9aa1a9;
  --accent: #7dd3c0;
  --accent-dim: #4f8a7d;
  --radius: 10px;
  --max-width: 880px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fafafa;
    --bg-elevated: #ffffff;
    --border: #e3e5e8;
    --text: #1b1f23;
    --text-muted: #5b6570;
    --accent: #2a7f6d;
    --accent-dim: #1f5e51;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

header.site {
  padding: 96px 0 48px;
}

.handle {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  margin: 0 0 12px;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}

.lede {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 62ch;
  margin: 0;
}

section {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

section h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin: 0 0 28px;
}

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

.skill-card {
  flex: 1 1 240px;
  max-width: 400px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}

.skill-card h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
}

.skill-card p {
  margin: 0 0 14px;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.tag-list li {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 9px;
}

.principles {
  display: grid;
  gap: 18px;
}

.principle {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 14px;
}

.principle .num {
  font-family: var(--font-mono);
  color: var(--accent-dim);
  font-size: 0.85rem;
  padding-top: 2px;
}

.principle h3 {
  margin: 0 0 4px;
  font-size: 1rem;
}

.principle p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

footer.site {
  padding: 40px 0 96px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

footer.site a:hover {
  text-decoration: underline;
}