:root {
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --card: #ffffff;
  --ink: #0e1116;
  --ink-soft: #262b33;
  --muted: #5b616e;
  --faint: #8b909c;
  --line: #ececef;
  --line-strong: #dcdee4;
  --accent: #2c52cc;
  --accent-ink: #20409f;
  --accent-wash: #eef1fb;
  --ok: #1aa06d;
  --maxw: 1100px;
  --r: 14px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
::selection { background: var(--accent); color: #fff; }

/* ---------- shared ---------- */
.eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent); display: block; margin-bottom: 0.9rem;
}
.lead { color: var(--muted); }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.85); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav__in {
  max-width: var(--maxw); margin: 0 auto; padding: 0.9rem 1.6rem;
  display: flex; align-items: center; justify-content: space-between;
}
.nav__brand { font-weight: 600; font-size: 1.02rem; letter-spacing: -0.01em; display: flex; align-items: center; gap: 0.5rem; }
.nav__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.nav__short { display: none; }
.nav__links { display: flex; align-items: center; gap: 1.8rem; }
.nav__links a { color: var(--muted); font-size: 0.9rem; transition: color .2s; }
.nav__links a:hover { color: var(--ink); }
.nav__cta {
  padding: 0.5rem 1.05rem; border-radius: 8px;
  background: var(--ink); color: #fff !important; font-weight: 500; font-size: 0.9rem;
  transition: background .2s;
}
.nav__cta:hover { background: var(--accent-ink); }

/* ---------- layout ---------- */
main { max-width: var(--maxw); margin: 0 auto; padding: 0 1.6rem; }
.section { padding: 5rem 0 0; }
.section__head { margin-bottom: 2.4rem; max-width: 660px; }
.section__head h2 { font-size: clamp(1.7rem, 3.4vw, 2.3rem); font-weight: 700; letter-spacing: -0.025em; line-height: 1.12; }
.section__head p { color: var(--muted); margin-top: 0.7rem; font-size: 1.02rem; }

/* ---------- hero (business-card header) ---------- */
.hero { padding: 3.5rem 0; }
.hero__card {
  background: var(--card); border: 1px solid var(--line); border-radius: 18px;
  padding: clamp(1.6rem, 3.2vw, 2.6rem);
  box-shadow: 0 30px 70px -42px rgba(14,17,22,0.45);
}
.hero__id { display: flex; align-items: center; gap: 1.4rem; }
.hero__photo {
  width: 104px; height: 104px; border-radius: 14px; object-fit: cover; object-position: 50% 16%;
  border: 1px solid var(--line-strong); flex-shrink: 0;
}
.hero__name { font-size: clamp(1.45rem, 3vw, 1.9rem); font-weight: 700; letter-spacing: -0.02em; line-height: 1.12; }
.hero__role { font-family: 'JetBrains Mono', monospace; font-size: 0.82rem; color: var(--accent); margin-top: 0.3rem; }
.hero__avail { display: inline-flex; align-items: center; gap: 0.5rem; margin-top: 0.65rem; font-size: 0.84rem; color: var(--muted); }
.hero__avail i { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 3px rgba(26,160,109,0.15); }
.hero__rule { border: none; border-top: 1px solid var(--line); margin: 1.7rem 0; }
.hero__headline { font-size: clamp(1.7rem, 3.8vw, 2.5rem); font-weight: 700; letter-spacing: -0.03em; line-height: 1.12; max-width: 660px; }
.hero__headline span { color: var(--accent); }
.hero__pitch { margin-top: 1.1rem; max-width: 620px; font-size: clamp(1rem, 1.4vw, 1.1rem); color: var(--muted); }
.hero__pitch strong { color: var(--ink); font-weight: 600; }
.hero__actions { display: flex; gap: 0.7rem; margin-top: 1.7rem; flex-wrap: wrap; }
.hero__links {
  list-style: none; display: flex; flex-wrap: wrap; gap: 0.4rem 1.3rem;
  margin-top: 1.5rem; font-family: 'JetBrains Mono', monospace; font-size: 0.82rem;
}
.hero__links a { color: var(--muted); transition: color .2s; }
.hero__links a::after { content: "↗"; font-size: 0.72em; margin-left: 0.2em; color: var(--faint); }
.hero__links a:hover { color: var(--accent); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.45rem;
  padding: 0.7rem 1.25rem; border-radius: 8px;
  border: 1px solid var(--line-strong); color: var(--ink);
  font-weight: 500; font-size: 0.93rem; transition: all .18s; background: var(--card);
}
.btn:hover { border-color: var(--ink); }
.btn--primary { background: var(--ink); color: #fff; border-color: var(--ink); }
.btn--primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); }
.btn--ghost { background: transparent; border-color: transparent; color: var(--accent); padding-left: 0.4rem; }
.btn--ghost:hover { color: var(--accent-ink); border-color: transparent; }

/* ---------- services / how I help ---------- */
.services { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.svc {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r);
  padding: 1.7rem; transition: border-color .2s, box-shadow .2s;
}
.svc:hover { border-color: var(--line-strong); box-shadow: 0 18px 40px -30px rgba(14,17,22,0.35); }
.svc__num { font-family: 'JetBrains Mono', monospace; font-size: 0.74rem; color: var(--accent); }
.svc h3 { font-size: 1.18rem; font-weight: 700; letter-spacing: -0.01em; margin: 0.5rem 0 0.55rem; }
.svc p { color: var(--muted); font-size: 0.95rem; }
.svc__tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 1rem; }
.svc__tags span { font-family: 'JetBrains Mono', monospace; font-size: 0.71rem; color: var(--ink-soft); background: var(--bg-soft); border: 1px solid var(--line); padding: 0.24rem 0.55rem; border-radius: 6px; }

/* ---------- stats ---------- */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; margin-top: 3rem;
}
.stat { padding: 1.5rem 1rem; text-align: center; border-left: 1px solid var(--line); }
.stat:first-child { border-left: none; }
.stat__num { display: block; font-size: clamp(1.6rem, 4vw, 2.1rem); font-weight: 800; letter-spacing: -0.02em; color: var(--ink); }
.stat__label { font-size: 0.78rem; color: var(--muted); font-family: 'JetBrains Mono', monospace; }

/* ---------- cards (work) ---------- */
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.card {
  position: relative; background: var(--card);
  border: 1px solid var(--line); border-radius: var(--r);
  padding: 1.7rem; transition: border-color .2s, box-shadow .2s;
  display: flex; flex-direction: column;
}
.card:hover { border-color: var(--line-strong); box-shadow: 0 20px 44px -32px rgba(14,17,22,0.35); }
.card--feature { grid-column: 1 / -1; background: var(--bg-soft); }
.card__top { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: 0.6rem; }
.card__top h3 { font-size: 1.3rem; font-weight: 700; letter-spacing: -0.015em; }
.card--feature .card__top h3 { font-size: 1.55rem; }
.card__role {
  font-family: 'JetBrains Mono', monospace; font-size: 0.69rem; letter-spacing: 0.02em;
  color: var(--accent); background: var(--accent-wash); padding: 0.24rem 0.6rem; border-radius: 6px; white-space: nowrap;
}
.card__role--private { color: var(--muted); background: var(--bg-soft); }
.card__desc { color: var(--muted); font-size: 0.96rem; }
.card__desc strong { color: var(--ink); font-weight: 600; }
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 1rem 0 0; }
.tags span { font-family: 'JetBrains Mono', monospace; font-size: 0.71rem; color: var(--muted); background: var(--bg-soft); border: 1px solid var(--line); padding: 0.24rem 0.55rem; border-radius: 6px; }
.card__links { display: flex; gap: 1.2rem; flex-wrap: wrap; margin-top: 1.2rem; }
.card__link { color: var(--accent); font-family: 'JetBrains Mono', monospace; font-size: 0.82rem; font-weight: 500; border-bottom: 1px solid transparent; transition: border-color .2s; }
.card__link:hover { border-bottom-color: var(--accent); }
.card .spacer { flex: 1; }

/* ---------- store badges ---------- */
.stores { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: 1.2rem; }
.store {
  display: inline-flex; align-items: center; gap: 0.55rem; padding: 0.5rem 0.9rem;
  border-radius: 10px; border: 1px solid var(--line-strong); background: var(--card); transition: border-color .2s;
}
.store:hover { border-color: var(--ink); }
.store svg { width: 18px; height: 18px; fill: var(--ink); flex-shrink: 0; }
.store span { display: flex; flex-direction: column; line-height: 1.1; font-weight: 600; font-size: 0.88rem; color: var(--ink); }
.store small { font-size: 0.59rem; font-weight: 500; color: var(--faint); text-transform: uppercase; letter-spacing: 0.04em; }

/* ---------- open source ---------- */
.cards--oss { grid-template-columns: repeat(2, 1fr); }
.oss { display: block; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 1.4rem; transition: border-color .2s, box-shadow .2s; }
.oss:hover { border-color: var(--line-strong); box-shadow: 0 16px 36px -30px rgba(14,17,22,0.35); }
.oss__head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.5rem; }
.oss__name { font-family: 'JetBrains Mono', monospace; font-weight: 600; color: var(--ink); }
.oss__star { font-family: 'JetBrains Mono', monospace; font-size: 0.82rem; color: var(--accent); }
.oss p { color: var(--muted); font-size: 0.89rem; }
.oss__more { margin-top: 1.4rem; font-family: 'JetBrains Mono', monospace; font-size: 0.86rem; }
.oss__more a { color: var(--accent); border-bottom: 1px solid var(--line-strong); }
.oss__more a:hover { border-bottom-color: var(--accent); }

/* ---------- timeline ---------- */
.timeline { display: flex; flex-direction: column; }
.tl { display: grid; grid-template-columns: 170px 1fr; gap: 1.6rem; padding: 1.6rem 0; border-top: 1px solid var(--line); }
.tl:first-child { border-top: none; }
.tl__when { font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; color: var(--accent); padding-top: 0.25rem; }
.tl__body h3 { font-size: 1.18rem; font-weight: 700; letter-spacing: -0.01em; }
.tl__meta { display: block; font-size: 0.8rem; color: var(--faint); margin: 0.2rem 0 0.6rem; font-family: 'JetBrains Mono', monospace; }
.tl__body p { color: var(--muted); font-size: 0.95rem; max-width: 640px; }

/* ---------- stack ---------- */
.stack { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.4rem 2.4rem; }
.stack__group h4 { font-size: 0.78rem; color: var(--faint); margin-bottom: 0.7rem; font-weight: 600; font-family: 'JetBrains Mono', monospace; text-transform: uppercase; letter-spacing: 0.06em; }
.chips { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.chips span { font-family: 'JetBrains Mono', monospace; font-size: 0.79rem; background: var(--card); border: 1px solid var(--line); padding: 0.34rem 0.7rem; border-radius: 7px; color: var(--ink-soft); }

/* ---------- writing ---------- */
.writing { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.writing__card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 1.4rem; transition: border-color .2s, box-shadow .2s; }
a.writing__card:hover { border-color: var(--line-strong); box-shadow: 0 16px 36px -30px rgba(14,17,22,0.3); }
.writing__card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 0.4rem; }
.writing__card p { color: var(--muted); font-size: 0.89rem; }

/* ---------- contact ---------- */
.contact { padding-top: 5.5rem; }
.contact__inner {
  background: var(--ink); color: #fff; border-radius: 18px;
  padding: clamp(2.2rem, 5vw, 3.8rem); text-align: center; position: relative; overflow: hidden;
}
.contact__inner::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(60% 90% at 50% -10%, rgba(44,82,204,0.45), transparent 70%); pointer-events: none;
}
.contact__inner > * { position: relative; }
.contact .eyebrow { color: #93a9f0; }
.contact h2 { font-size: clamp(1.7rem, 4vw, 2.5rem); font-weight: 700; letter-spacing: -0.025em; margin-bottom: 1rem; }
.contact__lead { color: #b9bdc7; max-width: 600px; margin: 0 auto 2rem; }
.contact__actions { display: flex; gap: 0.7rem; justify-content: center; flex-wrap: wrap; }
.contact .btn { background: rgba(255,255,255,0.07); border-color: rgba(255,255,255,0.18); color: #fff; }
.contact .btn:hover { border-color: #fff; }
.contact .btn--primary { background: #fff; color: var(--ink); border-color: #fff; }
.contact .btn--primary:hover { background: #e8ecf8; border-color: #e8ecf8; }

/* ---------- footer ---------- */
.footer {
  max-width: var(--maxw); margin: 4rem auto 0; padding: 2.2rem 1.6rem;
  border-top: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
  font-size: 0.84rem; color: var(--faint); font-family: 'JetBrains Mono', monospace;
}
.footer__links { display: flex; gap: 1.3rem; }
.footer__links a { color: var(--muted); transition: color .2s; }
.footer__links a:hover { color: var(--accent); }

/* ---------- reveal ---------- */
.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .5s ease, transform .5s ease; }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 880px) {
  .services { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .nav__links a:not(.nav__cta) { display: none; }
  .nav__full { display: none; }
  .nav__short { display: inline; }
  .hero__id { gap: 1rem; }
  .hero__photo { width: 78px; height: 78px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(odd) { border-left: none; }
  .stat:nth-child(3), .stat:nth-child(4) { border-top: 1px solid var(--line); }
  .services, .cards, .cards--oss, .stack, .writing { grid-template-columns: 1fr; }
  .card--feature { grid-column: auto; }
  .tl { grid-template-columns: 1fr; gap: 0.35rem; }
  .tl__when { padding-top: 0; }
}
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
}