/* ---------- tokens ---------- */
:root {
  --bg: #faf9f6;
  --bg-raised: #ffffff;
  --ink: #1c1e21;
  --ink-soft: #4b5259;
  --ink-faint: #6b7177;   /* 4.7:1 on --bg (WCAG AA) */
  --line: #e3e0d8;
  --accent: #0e7490;
  --accent-ink: #0b5c73;
  --accent-soft: #e6f3f6;
  --mono: "SF Mono", ui-monospace, "Cascadia Code", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171a;
    --bg-raised: #1d2024;
    --ink: #e8e6e1;
    --ink-soft: #b3b0a9;
    --ink-faint: #9a968f;   /* 6.1:1 on dark --bg */
    --line: #2c3036;
    --accent: #4fb3cf;
    --accent-ink: #7accdf;
    --accent-soft: #12333c;
  }
  .btn-primary { color: var(--bg); }   /* white on the light accent was 2.4:1 */
}

/* ---------- base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 4.5rem; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 62rem; margin-inline: auto; padding-inline: 1.25rem; }
a { color: var(--accent-ink); }
code { font-family: var(--mono); font-size: 0.85em; background: var(--accent-soft); padding: 0.1em 0.35em; border-radius: 4px; }
h1, h2, h3, h4 { line-height: 1.25; text-wrap: balance; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header nav { display: flex; align-items: center; justify-content: space-between; height: 3.5rem; }
.brand { font-family: var(--mono); font-weight: 700; font-size: 1.2rem; color: var(--ink); text-decoration: none; }
.brand .accent { color: var(--accent); }
.nav-links { display: flex; gap: 1.5rem; }
.nav-links a { color: var(--ink-soft); text-decoration: none; font-size: 0.95rem; }
.nav-links a:hover { color: var(--accent-ink); }

/* ---------- hero ---------- */
.hero { padding-block: 5rem 3.5rem; }
.kicker {
  font-family: var(--mono); font-size: 0.85rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--accent-ink); margin: 0 0 1rem;
}
.hero h1 { font-size: clamp(1.9rem, 4.5vw, 3rem); margin: 0 0 1.25rem; max-width: 40ch; }
.hero h1 em { color: var(--accent-ink); font-style: italic; }
.lede { font-size: 1.15rem; color: var(--ink-soft); max-width: 46rem; margin: 0 0 1.75rem; }

.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-bottom: 3rem; }
.btn {
  display: inline-block; padding: 0.6rem 1.1rem; border-radius: 8px;
  border: 1px solid var(--line); background: var(--bg-raised);
  color: var(--ink); text-decoration: none; font-weight: 500; font-size: 0.95rem;
}
.btn:hover { border-color: var(--accent); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-ink); }

.stat-strip {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: 1px; background: var(--line); border: 1px solid var(--line);
  border-radius: 12px; overflow: hidden; margin: 0;
}
.stat-strip > div { background: var(--bg-raised); padding: 1.1rem 1.25rem; }
.stat-strip dt { font-family: var(--mono); font-size: 1.9rem; font-weight: 700; color: var(--accent-ink); }
.stat-strip dd { margin: 0.25rem 0 0; font-size: 0.85rem; color: var(--ink-soft); }

/* ---------- sections ---------- */
section { padding-block: 3rem; }
h2 { font-size: 1.7rem; margin: 0 0 0.75rem; }
.section-num { font-family: var(--mono); font-size: 0.9rem; color: var(--accent); vertical-align: 0.35em; margin-right: 0.5rem; }
.section-intro { color: var(--ink-soft); max-width: 46rem; margin: 0 0 2rem; }
.subhead { margin: 2.5rem 0 1rem; font-size: 1.15rem; color: var(--ink-soft); }

/* ---------- project cards ---------- */
.cards { display: grid; gap: 1.25rem; }
.cards.minor { grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
.card {
  background: var(--bg-raised); border: 1px solid var(--line);
  border-radius: 12px; padding: 1.5rem 1.6rem;
}
.card.featured { border-color: var(--accent); border-width: 1.5px; }
.card .shot { display: block; margin: 0.9rem 0 0.25rem; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--bg); }
.card .shot img { display: block; width: 100%; height: auto; max-height: 24rem; object-fit: cover; object-position: top; }
.card .shot:hover { border-color: var(--accent); }
.private-list { margin: 0; padding-left: 1.2rem; color: var(--ink-soft); font-size: 0.95rem; }
.private-list li { margin-bottom: 0.6rem; }
.card h3 { font-size: 1.15rem; margin: 0 0 0.6rem; }
.card h4 { font-size: 1rem; margin: 0 0 0.5rem; }
.card p { margin: 0.6rem 0 0; color: var(--ink-soft); font-size: 0.98rem; }
.card p:first-of-type { margin-top: 0.75rem; }

.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0; }
.tags span {
  font-family: var(--mono); font-size: 0.8rem; color: var(--accent-ink);
  background: var(--accent-soft); border-radius: 99px; padding: 0.15rem 0.6rem;
}
.tags.wide span { font-size: 0.8rem; padding: 0.25rem 0.7rem; }

details { margin-top: 1rem; border-top: 1px dashed var(--line); padding-top: 0.75rem; }
summary {
  cursor: pointer; font-family: var(--mono); font-size: 0.85rem;
  color: var(--accent-ink); user-select: none;
}
summary:hover { text-decoration: underline; }
details ul { margin: 0.75rem 0 0.25rem; padding-left: 1.2rem; color: var(--ink-soft); font-size: 0.95rem; }
details li { margin-bottom: 0.6rem; }
details li:last-child { margin-bottom: 0; }

/* ---------- practice ---------- */
.practice-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); gap: 1.25rem; }
.practice-grid > div {
  border-left: 3px solid var(--accent); padding: 0.25rem 0 0.25rem 1.1rem;
}
.practice-grid h3 { font-size: 1.05rem; margin: 0 0 0.4rem; }
.practice-grid p { margin: 0; color: var(--ink-soft); font-size: 0.95rem; }

/* ---------- experience ---------- */
.job { background: var(--bg-raised); border: 1px solid var(--line); border-radius: 12px; padding: 1.5rem 1.6rem; }
.job h3 { margin: 0; font-size: 1.2rem; }
.job-meta { margin: 0.3rem 0 0; font-size: 0.9rem; color: var(--ink-faint); }
.job ul { margin: 1rem 0 0; padding-left: 1.2rem; color: var(--ink-soft); }
.job li { margin-bottom: 0.5rem; }
.skills-block { margin-top: 1.75rem; }
.skills-block h3 { font-size: 1.05rem; margin-bottom: 0.75rem; }
.edu { margin-top: 1.5rem; color: var(--ink-soft); }

/* ---------- contact / footer ---------- */
.contact p { max-width: 42rem; color: var(--ink-soft); }
.site-footer { border-top: 1px solid var(--line); margin-top: 2rem; padding-block: 1.5rem; }
.site-footer p { font-size: 0.85rem; color: var(--ink-faint); margin: 0; }

@media (max-width: 40rem) {
  .nav-links { gap: 0.75rem; flex-wrap: wrap; justify-content: flex-end; }
  .nav-links a { font-size: 0.85rem; }
  .hero { padding-block: 3.5rem 2.5rem; }
}