/* ---------- Theme ---------- */
:root {
  --bg:              #fafaf9;
  --surface:         #ffffff;
  --ink:             #111111;
  --muted:           #55555a;
  --faint:           #999999;
  --line:            #e5e5e5;
  --accent:          #3d5a73;
  --accent-contrast: #ffffff;
  --font-sans:       "Inter", system-ui, -apple-system, Segoe UI, Arial, sans-serif;
  --maxw:            960px;
  --radius:          4px;
}
:root[data-theme="dark"] {
  --bg:              #0b0b0b;
  --surface:         #141414;
  --ink:             #f2f2f2;
  --muted:           #b3b3ba;
  --faint:           #767680;
  --line:            #262626;
  --accent:          #85a8c4;
  --accent-contrast: #0b0b0b;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--ink); text-decoration-color: var(--line); text-underline-offset: 3px; transition: color .15s ease, text-decoration-color .15s ease; }
a:hover { color: var(--accent); text-decoration-color: var(--accent); }

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

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 16px; height: 60px; }
.nav-brand { color: var(--ink); font-weight: 600; letter-spacing: -.01em; text-decoration: none; }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 22px; }
.nav-links a { color: var(--muted); font-size: .94rem; font-weight: 500; text-decoration: none; }
.nav-links a:hover { color: var(--accent); }
.nav-cta {
  padding: 6px 14px; border: 1px solid var(--line); border-radius: var(--radius);
  color: var(--ink) !important; font-size: .88rem;
}
.nav-cta:hover { border-color: var(--accent); }

.theme-toggle {
  width: 32px; height: 32px; flex: 0 0 auto;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); cursor: pointer; padding: 0;
  display: grid; place-items: center;
}
.theme-toggle:hover { border-color: var(--accent); }
.theme-icon { width: 14px; height: 14px; border-radius: 50%;
  background: var(--ink);
  box-shadow: inset -4px -4px 0 0 var(--surface);
}
:root[data-theme="dark"] .theme-icon {
  background: var(--ink);
  box-shadow: inset -4px -4px 0 0 var(--surface);
}

/* ---------- Hero ---------- */
.hero {
  display: grid; grid-template-columns: 1fr auto; gap: 48px; align-items: center;
  padding-top: 64px; padding-bottom: 56px;
}
.eyebrow {
  font-size: .82rem; letter-spacing: .04em; text-transform: uppercase;
  color: var(--accent); font-weight: 600; margin: 0 0 18px;
}
.lead {
  font-size: 1.3rem; line-height: 1.42; letter-spacing: -.01em;
  color: var(--ink); margin: 0 0 28px; max-width: 40ch; font-weight: 500;
}
.hero-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.hero-links { margin: 0; font-size: .92rem; color: var(--faint); }
.hero-links a { color: var(--muted); text-decoration: none; }
.hero-links a:hover { color: var(--accent); }
.hero-portrait img {
  width: 220px; height: 220px; object-fit: cover; border-radius: var(--radius);
  border: 1px solid var(--line);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: 11px 20px; border-radius: var(--radius);
  font-weight: 600; font-size: .95rem; border: 1px solid transparent;
  transition: opacity .15s ease;
}
.btn:hover { text-decoration: none; }
.btn.primary { background: var(--ink); color: var(--bg); }
.btn.primary:hover { opacity: .82; }

/* ---------- Sections ---------- */
.section { padding-block: 56px; border-top: 1px solid var(--line); }
.section-head { margin-bottom: 36px; }
.sec-no {
  color: var(--accent); font-weight: 600; margin-right: 12px;
}
.section h2 {
  font-size: 1.5rem; letter-spacing: -.02em; margin: 0; font-weight: 700;
}
.section-sub { color: var(--muted); margin: 8px 0 0; max-width: 48ch; }

/* ---------- Experience timeline ---------- */
.exp-timeline { list-style: none; margin: 0; padding: 0; position: relative; }
.exp-timeline::before {
  content: ""; position: absolute; left: 13px; top: 10px; bottom: 10px;
  width: 1px; background: var(--line);
}
.exp-item { position: relative; padding: 0 0 48px 40px; }
.exp-item:last-child { padding-bottom: 0; }
.exp-node {
  position: absolute; left: 8px; top: 8px; width: 11px; height: 11px;
  border-radius: 50%; background: var(--bg); border: 2px solid var(--faint);
}
.exp-node.current { border-color: var(--accent); background: var(--accent); }

.exp-head { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 2px; }
.exp-logo {
  flex: 0 0 auto; padding: 4px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff;
  display: inline-flex; align-items: center; justify-content: center;
}
.exp-logo img { display: block; width: auto; height: 26px; }
.exp-head-text { flex: 1 1 auto; }
.exp-date { margin: 6px 0 0 auto; font-size: .82rem; color: var(--faint); white-space: nowrap; }
.exp-date.current { color: var(--accent); }

.project-role {
  font-size: .82rem; letter-spacing: .02em; color: var(--muted);
  text-transform: uppercase; font-weight: 600; margin: 2px 0 0;
}
.project-company { font-size: 1.3rem; letter-spacing: -.02em; margin: 0; font-weight: 700; }
.project-where { color: var(--faint); font-size: .88rem; margin: 10px 0 12px; }
.project-tagline { font-size: 1.02rem; font-weight: 500; margin: 0 0 12px; }
.case-result { color: var(--muted); margin: 0; }
.stat { color: var(--accent); font-weight: 600; }

.exp-points { margin: 0 0 16px; padding: 0; list-style: none; color: var(--muted); }
.exp-points li { position: relative; padding-left: 16px; margin-bottom: 8px; line-height: 1.55; }
.exp-points li::before { content: "–"; position: absolute; left: 0; color: var(--faint); }

/* ---------- Experience media (Elm demo reels) ---------- */
.exp-media { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 16px; }
.demo-card {
  margin: 0; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; background: var(--surface);
}
.demo-video {
  display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover;
  background: var(--bg); cursor: pointer;
}
.demo-card figcaption {
  padding: 8px 10px; font-size: .78rem; color: var(--muted); border-top: 1px solid var(--line);
}

/* ---------- Education ---------- */
.edu-item { display: flex; align-items: flex-start; gap: 14px; max-width: 62ch; }
.edu-item .project-company { margin-top: 4px; }

/* ---------- Chips (tags & skills) ---------- */
.chip-list { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; }
.chip-list li {
  font-size: .82rem; color: var(--muted);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 3px 10px;
}

/* ---------- Skills ---------- */
.skills-row { margin-bottom: 22px; }
.skills-row:last-child { margin-bottom: 0; }
.skills-row h4 {
  font-size: .82rem; text-transform: uppercase; letter-spacing: .04em;
  color: var(--faint); font-weight: 600; margin: 0 0 10px;
}

/* ---------- Contact ---------- */
.contact h2 { margin: 0; }
.contact-lead { color: var(--muted); margin: 0 0 24px; font-size: 1.06rem; max-width: 46ch; }

/* ---------- Footer ---------- */
.footer {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px;
  padding-block: 32px; color: var(--faint); font-size: .9rem;
  border-top: 1px solid var(--line); margin-top: 16px;
}

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; gap: 32px; padding-top: 48px; }
  .hero-portrait { order: -1; }
  .hero-portrait img { width: 132px; height: 132px; }
  .lead { max-width: none; }
  .exp-item { padding-left: 32px; }
  .exp-node { left: 4px; }
  .exp-timeline::before { left: 9px; }
  .exp-head { flex-wrap: wrap; }
  .exp-date { margin-left: 42px; }
  .edu-item { flex-direction: column; }
  .exp-media { grid-template-columns: 1fr; }
  .nav-links { gap: 16px; }
  .nav-links a:not(.nav-cta) { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}