:root {
  --bg: #fbfbfa;
  --surface: #ffffff;
  --text: #1c1d21;
  --muted: #5d6170;
  --border: #e4e4e7;
  --accent: #4f46e5;
  --accent-contrast: #ffffff;
  --tag-bg: #eef0ff;
  --tag-text: #3730a3;
  --radius: 12px;
  --max: 960px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1014;
    --surface: #17181e;
    --text: #e8e8ec;
    --muted: #9a9caa;
    --border: #2a2c35;
    --accent: #8b85ff;
    --accent-contrast: #0f1014;
    --tag-bg: #23243a;
    --tag-text: #c7c4ff;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 4.5rem; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 0.5em; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.125rem; }
p { margin: 0 0 1em; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 1rem; }
@media (min-width: 640px) { .container { padding: 0 1.5rem; } }

.skip {
  position: absolute; left: -999px; top: 0.5rem;
  background: var(--accent); color: var(--accent-contrast);
  padding: 0.5rem 1rem; border-radius: 6px; z-index: 100;
}
.skip:focus { left: 0.5rem; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; gap: 1rem; height: 3.75rem; }
.brand { font-family: var(--mono); font-weight: 500; color: var(--text); text-decoration: none; font-size: 1.05rem; }
.accent { color: var(--accent); }
.nav ul { display: flex; gap: 0.25rem; list-style: none; margin: 0; padding: 0; }
.nav a:not(.brand) {
  color: var(--muted); text-decoration: none; font-size: 0.95rem; font-weight: 500;
  padding: 0.4rem 0.6rem; border-radius: 6px;
}
.nav a:not(.brand):hover { color: var(--text); background: var(--tag-bg); }
@media (max-width: 480px) {
  .nav ul { gap: 0; }
  .nav a:not(.brand) { font-size: 0.875rem; padding: 0.4rem 0.4rem; }
}

/* Hero */
.hero { padding-top: 5rem; padding-bottom: 4rem; }
@media (min-width: 640px) { .hero { padding-top: 7rem; padding-bottom: 5rem; } }
.eyebrow { font-family: var(--mono); color: var(--accent); margin-bottom: 0.5rem; }
.hero h1 { font-size: clamp(2.5rem, 8vw, 4.25rem); font-weight: 700; letter-spacing: -0.03em; }
.lede { font-size: 1.2rem; color: var(--muted); max-width: 38rem; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }

.btn {
  display: inline-block; padding: 0.7rem 1.25rem; border-radius: 8px;
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text); font-weight: 600; font-size: 0.975rem; text-decoration: none;
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-contrast); }

/* Sections */
.section { padding-top: 3.5rem; padding-bottom: 3.5rem; border-top: 1px solid var(--border); }
.about { max-width: 42rem; }

.grid { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 270px), 1fr)); }
.card {
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.5rem; transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card p { color: var(--muted); font-size: 0.975rem; }
.card .links { margin-top: auto; display: flex; gap: 1rem; font-weight: 600; font-size: 0.95rem; }

.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none; padding: 0; margin: 0 0 1.25rem; }
.tags li {
  font-family: var(--mono); font-size: 0.8rem;
  background: var(--tag-bg); color: var(--tag-text);
  padding: 0.2rem 0.6rem; border-radius: 999px;
}

.skills { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); }
.skills h3 { color: var(--muted); font-size: 0.95rem; font-weight: 600; }
.resume { margin-top: 1.5rem; }

.contact { list-style: none; padding: 0; margin: 1.5rem 0 0; display: grid; gap: 0.75rem; }
.contact li { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; align-items: baseline; }
.contact .label { font-family: var(--mono); font-size: 0.85rem; color: var(--muted); min-width: 5.5rem; }
.contact a { overflow-wrap: anywhere; }

/* Experience & education */
.job { margin-bottom: 1.75rem; }
.job-head { display: flex; justify-content: space-between; gap: 0.75rem; flex-wrap: wrap; align-items: baseline; }
.job-head h3 { margin: 0; }
.job-head h3 span { font-weight: 400; color: var(--muted); }
.dates { color: var(--muted); font-family: var(--mono); font-size: 0.85rem; white-space: nowrap; }
.duties { margin: 0.5rem 0 0; padding-left: 1.25rem; color: var(--muted); }
.duties li { margin-bottom: 0.35rem; }
.meta-line { color: var(--muted); font-size: 0.95rem; margin: 0.5rem 0 0; max-width: 42rem; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 2rem 0; color: var(--muted); font-size: 0.9rem; }
.site-footer p { margin: 0; }