/* GN Labs — shared styles */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Source+Serif+4:opsz,wght@8..60,400;8..60,500;8..60,600&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --paper: #ededE1;
  --surface: #e2e2d3;
  --ink: #1c221e;
  --ink-soft: #4a5049;
  --line: #a7ac98;
  --teal: #2f5a50;
  --teal-soft: #3f6e62;
  --ochre: #b56d19;

  --grotesk: 'Space Grotesk', sans-serif;
  --serif: 'Source Serif 4', serif;
  --mono: 'JetBrains Mono', monospace;

  --measure: 42rem;
  --wide: 60rem;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--grotesk);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.6em;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.1rem, 4.6vw, 3.4rem); }
h2 { font-size: clamp(1.4rem, 2.6vw, 1.8rem); }
h3 { font-size: 1.05rem; font-family: var(--serif); font-weight: 600; }

p { margin: 0 0 1.1em; max-width: var(--measure); }
a { color: var(--teal); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--ochre); }

.wrap {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---- Nav ---- */

.site-nav {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.mark {
  font-family: var(--grotesk);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}
.mark:hover { color: var(--ink); }
.mark .rule { width: 1px; height: 1.05em; background: var(--line); display: inline-block; }
.mark .labs { font-family: var(--mono); font-weight: 500; font-size: 0.92rem; color: var(--teal); letter-spacing: 0.02em; }

.nav-links {
  display: flex;
  gap: 1.9rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.88rem;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--teal); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 2px;
  width: 2.1rem;
  height: 2.1rem;
  cursor: pointer;
  position: relative;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ''; position: absolute; left: 0.5rem; right: 0.5rem; height: 1px; background: var(--ink);
}
.nav-toggle span { top: 50%; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

@media (max-width: 640px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 4rem; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 0.5rem 1.5rem 1rem;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 0.6rem 0; border-bottom: 1px solid var(--surface); }
}

/* ---- Sections ---- */

main { display: block; }

.section {
  padding: 4.5rem 0;
  border-bottom: 1px solid var(--line);
}
.section:last-of-type { border-bottom: none; }
.section-tight { padding: 3rem 0; }

.section > .wrap > p:first-of-type { margin-top: 0; }

/* ---- Hero ---- */

.hero {
  padding-top: 4.5rem;
  padding-bottom: 3rem;
}
.hero h1 { max-width: 32ch; }
.hero .lede { font-size: 1.15rem; color: var(--ink-soft); max-width: 38ch; }

.diagram-wrap { margin-top: 3rem; overflow-x: auto; }
.diagram-wrap svg { width: 100%; height: auto; max-width: 760px; display: block; }
.diagram-wrap .flow-line, .diagram-wrap .node-box {
  stroke-dasharray: 6 4000;
  stroke-dashoffset: 4000;
  transition: stroke-dashoffset 1.6s ease;
}
.diagram-wrap.drawn .flow-line, .diagram-wrap.drawn .node-box {
  stroke-dashoffset: 0;
}
.diagram-wrap text { font-family: var(--mono); font-size: 11px; fill: var(--ink-soft); }

/* ---- Tracks / grid ---- */

.tracks {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}
@media (max-width: 700px) { .tracks { grid-template-columns: 1fr; gap: 2.5rem; } }

.track h2 { color: var(--teal); }
.track ul { padding-left: 0; list-style: none; margin: 1rem 0 0; }
.track li {
  padding: 0.55rem 0;
  border-top: 1px solid var(--surface);
  font-size: 0.98rem;
}
.track li:first-child { border-top: none; }

/* ---- Work list ---- */

.work-item {
  padding: 2.2rem 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 10rem 1fr;
  gap: 1.5rem;
}
.work-item:first-of-type { border-top: none; }
@media (max-width: 700px) { .work-item { grid-template-columns: 1fr; gap: 0.5rem; } }

.work-item .tag {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--teal-soft);
}
.work-item h3 { margin-bottom: 0.4rem; }
.work-item .meta { font-family: var(--mono); font-size: 0.78rem; color: var(--ink-soft); margin-top: 0.8rem; display: block; }

/* ---- Tags ---- */

.tag-row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.9rem; }
.tag-chip {
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--teal-soft);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 0.2rem 0.55rem;
  background: var(--surface);
}

/* ---- Buttons / links ---- */

.btn {
  display: inline-block;
  font-family: var(--grotesk);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--paper);
  background: var(--teal);
  padding: 0.7rem 1.3rem;
  border-radius: 2px;
  text-decoration: none;
  border: 1px solid var(--teal);
}
.btn:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }

.btn-quiet {
  color: var(--teal);
  background: none;
  border: 1px solid var(--line);
}
.btn-quiet:hover { color: var(--ochre); border-color: var(--ochre); background: none; }

/* ---- About specifics ---- */

.timeline { margin-top: 1rem; }
.timeline .row {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: 1rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--surface);
}
.timeline .row:first-child { border-top: none; }
.timeline .when { font-family: var(--mono); font-size: 0.82rem; color: var(--ink-soft); }
@media (max-width: 640px) { .timeline .row { grid-template-columns: 1fr; gap: 0.2rem; } }

.resume-note {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
  color: var(--ink-soft);
}

/* ---- Contact ---- */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 1rem;
}
@media (max-width: 640px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-grid a { display: block; padding: 0.6rem 0; border-top: 1px solid var(--surface); text-decoration: none; color: var(--ink); }
.contact-grid a:first-child { border-top: none; }
.contact-grid a:hover { color: var(--teal); }
.contact-grid .label { font-family: var(--mono); font-size: 0.78rem; color: var(--ink-soft); display: block; }

/* ---- Footer ---- */

.site-footer {
  padding: 2.5rem 0 3rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--ink-soft);
}
.site-footer a { color: var(--ink-soft); }
.site-footer a:hover { color: var(--teal); }

:focus-visible {
  outline: 2px solid var(--ochre);
  outline-offset: 2px;
}