:root {
  --bg: #fbfbfa;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #5b6474;
  --line: #e6e7ea;
  --accent: #0d7c66;
  --accent-soft: #e3f2ee;
  --max: 1080px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f17;
    --surface: #121826;
    --text: #e8ebf1;
    --muted: #9aa3b2;
    --line: #222a3a;
    --accent: #3fd0ac;
    --accent-soft: #10302a;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

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

.skip {
  position: absolute; left: -999px; top: 8px;
  background: var(--accent); color: #fff; padding: 8px 12px; border-radius: 6px;
}
.skip:focus { left: 8px; z-index: 100; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-weight: 500; font-size: 20px; text-decoration: none;
}
.brand span { color: var(--accent); }
nav { display: flex; gap: 4px; }
nav a {
  text-decoration: none; color: var(--muted); font-size: 14px; font-weight: 500;
  padding: 6px 10px; border-radius: 6px;
}
nav a:hover { color: var(--text); background: var(--accent-soft); }
nav .nav-cta { color: var(--accent); }

/* Hero */
.hero { padding: 96px 0 72px; }
.eyebrow {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  color: var(--accent); font-size: 14px; margin: 0 0 12px;
}
h1 {
  font-size: clamp(40px, 7vw, 72px); line-height: 1.05;
  letter-spacing: -0.03em; margin: 0 0 16px; font-weight: 700;
}
.role { font-size: clamp(18px, 2.4vw, 22px); color: var(--muted); margin: 0 0 24px; font-weight: 500; }
.role .sep { color: var(--accent); margin: 0 6px; }
.lede { font-size: 18px; max-width: 680px; margin: 0 0 32px; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-block; text-decoration: none; font-weight: 600; font-size: 15px;
  padding: 11px 18px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--surface); transition: border-color .15s, transform .15s;
}
.btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .btn.primary { color: #06231c; } }

.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  margin: 64px 0 0; padding: 0;
}
.stats div {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: 20px;
}
.stats dt { font-size: 30px; font-weight: 700; letter-spacing: -0.02em; color: var(--accent); }
.stats dd { margin: 4px 0 0; color: var(--muted); font-size: 14px; line-height: 1.4; }

/* Sections */
.section { padding: 72px 0; border-top: 1px solid var(--line); }
.grid-2 { display: grid; grid-template-columns: 220px 1fr; gap: 48px; }
h2 {
  font-size: 14px; text-transform: uppercase; letter-spacing: .12em;
  color: var(--muted); margin: 6px 0 0; font-weight: 600;
}
.prose p { margin: 0 0 16px; font-size: 17px; }
.prose .meta { color: var(--muted); font-size: 15px; }

/* Experience */
.job { margin-bottom: 48px; }
.job:last-child { margin-bottom: 0; }
.job h3 { font-size: 22px; margin: 0; letter-spacing: -0.01em; }
.where { color: var(--muted); margin: 2px 0 20px; font-size: 15px; }
.position { border-left: 2px solid var(--line); padding-left: 20px; margin-bottom: 24px; }
.position h4 {
  font-size: 17px; margin: 0 0 8px; display: flex; flex-wrap: wrap;
  justify-content: space-between; gap: 4px 16px;
}
.position h4 span {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 13px; font-weight: 500; color: var(--muted);
}
.position ul { margin: 0; padding-left: 18px; }
.position li { margin-bottom: 6px; }
.position li::marker { color: var(--accent); }

/* Skills */
.skills { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px 32px; }
.skill-group h3 { font-size: 15px; margin: 0 0 10px; }
.tags { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.tags li {
  font-size: 13px; padding: 4px 10px; border-radius: 999px;
  background: var(--accent-soft); color: var(--text);
}

/* Education */
.edu article { margin-bottom: 24px; }
.edu h3 { font-size: 18px; margin: 0 0 2px; }
.edu p { margin: 0; color: var(--muted); }
.edu .when { font-family: "JetBrains Mono", ui-monospace, monospace; font-size: 13px; margin-top: 4px; }

/* Contact */
.contact { padding: 96px 0; }
.contact h2 {
  font-size: clamp(32px, 5vw, 48px); text-transform: none; letter-spacing: -0.02em;
  color: var(--text); font-weight: 700; margin: 0 0 16px;
}

.site-footer { border-top: 1px solid var(--line); padding: 28px 0; color: var(--muted); font-size: 14px; }
.site-footer p { margin: 0; }

/* Responsive */
@media (max-width: 860px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; gap: 20px; }
  .skills { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .wrap { padding: 0 16px; }
  nav a:not(.nav-cta) { display: none; }
  .hero { padding: 64px 0 48px; }
  .stats { gap: 10px; }
  .stats div { padding: 16px; }
  .stats dt { font-size: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}

/* Language switch */
nav .nav-lang {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 13px; border: 1px solid var(--line); margin-left: 6px;
}

/* Case studies */
.cases { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.case {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: 24px;
}
.case-metric {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 13px; color: var(--accent); margin: 0 0 8px;
}
.case h3 { font-size: 18px; line-height: 1.35; margin: 0 0 16px; letter-spacing: -0.01em; }
.case dl { margin: 0; }
.case dt {
  font-size: 12px; text-transform: uppercase; letter-spacing: .08em;
  color: var(--muted); font-weight: 600; margin-top: 12px;
}
.case dt:first-child { margin-top: 0; }
.case dd { margin: 2px 0 0; font-size: 15px; line-height: 1.55; }
@media (max-width: 860px) { .cases { grid-template-columns: 1fr; } }

/* Mobile: keep the language switch visible */
@media (max-width: 600px) { nav a.nav-lang { display: inline-block; } }