:root {
  --bg: #fbfaf8;
  --bg-alt: #f2f0ec;
  --text: #1a1a18;
  --text-dim: #5c5a54;
  --accent: #3d3aeb;
  --accent-soft: #ecebfc;
  --border: #e4e1da;
  --max-w: 760px;
  --serif: "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

:root[data-theme="dark"] {
  --bg: #16161a;
  --bg-alt: #1e1e24;
  --text: #eceae6;
  --text-dim: #9a978f;
  --accent: #8b88ff;
  --accent-soft: #262454;
  --border: #2c2c33;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #16161a;
    --bg-alt: #1e1e24;
    --text: #eceae6;
    --text-dim: #9a978f;
    --accent: #8b88ff;
    --accent-soft: #262454;
    --border: #2c2c33;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 18px max(16px, calc((100% - var(--max-w)) / 2));
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-mark {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  color: var(--text);
  margin-right: auto;
}

.nav-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.92rem;
}

.nav-links a:hover { color: var(--accent); }

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 999px;
  width: 30px;
  height: 30px;
  cursor: pointer;
  font-size: 0.95rem;
  line-height: 1;
}

.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 90px 16px 60px;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--accent);
  text-transform: lowercase;
  letter-spacing: 0.02em;
  margin: 0 0 14px;
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 6vw, 3.4rem);
  margin: 0 0 18px;
  line-height: 1.08;
}

.hero-sub {
  color: var(--text-dim);
  font-size: 1.12rem;
  max-width: 54ch;
  margin: 0 0 32px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 11px 20px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover { opacity: 0.88; }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 16px;
}

.section {
  padding: 56px 0;
  border-top: 1px solid var(--border);
}

.section-title {
  font-family: var(--serif);
  font-size: 1.5rem;
  margin: 0 0 24px;
}

.section p { color: var(--text); }
.section p + p { margin-top: 14px; }

.job, .project { margin-bottom: 8px; }

.job-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.job-head h3 {
  margin: 0 0 2px;
  font-size: 1.08rem;
}

.job-org {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.job-date {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  white-space: nowrap;
}

.job ul, .project-points {
  margin: 0 0 40px;
  padding-left: 20px;
}

.job ul li, .project-points li {
  margin-bottom: 9px;
  color: var(--text);
}

.job ul li::marker, .project-points li::marker {
  color: var(--accent);
}

code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--bg-alt);
  padding: 1px 6px;
  border-radius: 4px;
}

.project {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px;
}

.project-head h3 {
  font-family: var(--serif);
  font-size: 1.6rem;
  margin: 0 0 4px;
}

.project-tagline {
  color: var(--text-dim);
  margin: 0 0 20px;
  font-size: 1rem;
}

.project-points {
  margin: 20px 0 24px;
}

.project-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 24px 0 14px;
}

.project-note {
  font-size: 0.88rem;
  color: var(--text-dim);
  margin: 0;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 22px;
}

.skill-group h4 {
  margin: 0 0 6px;
  font-size: 0.95rem;
}

.skill-group p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.92rem;
}

.contact-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.contact-links a {
  color: var(--accent);
  text-decoration: none;
  font-size: 1rem;
  border-bottom: 1px solid transparent;
}

.contact-links a:hover { border-bottom-color: var(--accent); }

.footer {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 40px 16px 70px;
  color: var(--text-dim);
  font-size: 0.85rem;
}

@media (max-width: 520px) {
  .nav-links { gap: 14px; }
  .nav-links a { font-size: 0.85rem; }
  .project { padding: 22px; }
}