:root {
  --bg: #f6f3ec;
  --surface: #fffdf8;
  --ink: #16171a;
  --muted: #5d5f66;
  --line: #dcd6c9;
  --accent: #0f6e63;
  --accent-ink: #ffffff;
  --dot: #b9b3a6;

  --serif: "Instrument Serif", Georgia, serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121316;
    --surface: #1a1c20;
    --ink: #ece9e2;
    --muted: #a3a29c;
    --line: #2d3036;
    --accent: #4fc2ae;
    --accent-ink: #0d1412;
    --dot: #4a4d55;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1rem/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
h1, h2, h3 { margin: 0; font-weight: 400; }

.wrap { width: 100%; max-width: 1040px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 480px) { .wrap { padding: 0 16px; } }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 10; background: var(--ink); color: var(--bg); padding: 8px 12px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* Top bar */
.topbar {
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar__inner { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.mark { font: 500 .85rem var(--mono); letter-spacing: .12em; text-decoration: none; }
.topbar nav { display: flex; gap: 22px; }
.topbar nav a { font-size: .875rem; color: var(--muted); text-decoration: none; }
.topbar nav a:hover { color: var(--ink); }
@media (max-width: 640px) { .topbar nav a:not(:last-child) { display: none; } }

/* Hero */
.hero {
  display: grid; grid-template-columns: 1.35fr 1fr; gap: 48px; align-items: center;
  padding-top: 88px; padding-bottom: 72px;
}
.eyebrow { font: 500 .78rem var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin: 0 0 20px; }
h1 { font-family: var(--serif); font-size: clamp(3rem, 8vw, 5.4rem); line-height: .95; letter-spacing: -.01em; }
h1 em { color: var(--muted); }
.lede { font-size: 1.125rem; color: var(--muted); max-width: 34em; margin: 28px 0 32px; }

.cta { display: flex; flex-wrap: wrap; gap: 10px; }
.btn {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 18px;
  border: 1px solid var(--line); border-radius: 999px;
  font-size: .925rem; font-weight: 500; text-decoration: none;
  transition: border-color .2s, background .2s, transform .2s;
}
.btn:hover { border-color: var(--ink); transform: translateY(-1px); }
.btn--solid { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn--solid:hover { border-color: var(--accent); filter: brightness(1.08); }

/* Pareto figure */
.pareto { margin: 0; }
.pareto svg { width: 100%; height: auto; overflow: visible; }
.pareto .axis { stroke: var(--line); stroke-width: 1.5; }
.pareto .dominated circle { fill: var(--dot); }
.pareto .optimal circle { fill: var(--accent); }
.pareto .front {
  fill: none; stroke: var(--accent); stroke-width: 1.5; stroke-dasharray: 600; stroke-dashoffset: 600;
  animation: draw 1.8s .3s ease-out forwards;
}
.pareto .optimal circle { opacity: 0; animation: pop .4s ease-out forwards; }
.pareto .optimal circle:nth-child(1) { animation-delay: .5s; }
.pareto .optimal circle:nth-child(2) { animation-delay: .75s; }
.pareto .optimal circle:nth-child(3) { animation-delay: 1s; }
.pareto .optimal circle:nth-child(4) { animation-delay: 1.25s; }
.pareto .optimal circle:nth-child(5) { animation-delay: 1.5s; }
.pareto .optimal circle:nth-child(6) { animation-delay: 1.75s; }
.pareto text { font: 11px var(--mono); fill: var(--muted); }
.pareto figcaption { font: italic 1.05rem var(--serif); color: var(--muted); margin-top: 8px; text-align: center; }
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes pop { to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  .pareto .front, .pareto .optimal circle { animation: none; stroke-dashoffset: 0; opacity: 1; }
  html { scroll-behavior: auto; }
}

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; padding-top: 56px; gap: 32px; }
  .pareto { max-width: 360px; }
}

/* Numbers */
.numbers { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--surface); }
.numbers__grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.numbers__grid > div { padding: 28px 20px 28px 0; }
.numbers__grid > div + div { padding-left: 20px; border-left: 1px solid var(--line); }
.numbers strong { display: block; font: 400 1.9rem/1.1 var(--serif); }
.numbers span { display: block; margin-top: 6px; font-size: .84rem; color: var(--muted); line-height: 1.45; }
@media (max-width: 820px) {
  .numbers__grid { grid-template-columns: 1fr 1fr; }
  .numbers__grid > div:nth-child(3) { padding-left: 0; border-left: 0; }
  .numbers__grid > div:nth-child(n+3) { border-top: 1px solid var(--line); }
}

/* Sections */
.section { padding-top: 88px; }
.section > h2, .contact h2 {
  font-family: var(--serif); font-size: clamp(2rem, 4.5vw, 2.8rem); line-height: 1.1;
  padding-bottom: 18px; margin-bottom: 8px; border-bottom: 1px solid var(--line);
}
h3 { font: 600 1.06rem/1.35 var(--sans); }
.role { margin: 2px 0 0; color: var(--accent); font-size: .94rem; font-weight: 500; }
.muted { color: var(--muted); }
time { font: .82rem var(--mono); color: var(--muted); white-space: nowrap; }

.job { padding: 32px 0; border-bottom: 1px solid var(--line); }
.job:last-child { border-bottom: 0; }
.job header { display: flex; justify-content: space-between; gap: 16px; align-items: baseline; }
.job__intro { margin: 14px 0 0; }
.job ul { margin: 14px 0 0; padding-left: 1.1em; color: var(--muted); }
.job li { margin: 6px 0; padding-left: 4px; }
.job li::marker { color: var(--accent); }
@media (max-width: 560px) { .job header { flex-direction: column; gap: 6px; } }

.feature { margin-top: 24px; padding: 28px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; }
.feature p { margin: 10px 0 0; color: var(--muted); max-width: 46em; }
.feature strong { color: var(--ink); }

.skills { margin: 0; }
.skills > div { display: grid; grid-template-columns: 200px 1fr; gap: 24px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.skills > div:last-child { border-bottom: 0; }
.skills dt { font: 500 .8rem var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--accent); padding-top: 3px; }
.skills dd { margin: 0; }
@media (max-width: 560px) { .skills > div { grid-template-columns: 1fr; gap: 4px; } }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.block { padding: 24px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; }
.block p { margin: 8px 0 0; }
.plain { list-style: none; margin: 8px 0 0; padding: 0; }
.plain li { margin: 4px 0; }
@media (max-width: 720px) { .grid2 { grid-template-columns: 1fr; } }

/* Contact */
.contact { margin-top: 104px; padding: 80px 0; background: var(--surface); border-top: 1px solid var(--line); }
.contact h2 { border: 0; padding: 0; margin: 0 0 10px; font-size: clamp(2.6rem, 7vw, 4rem); }
.contact p { color: var(--muted); margin: 0 0 28px; font-size: 1.1rem; }
.contact .btn--solid { overflow-wrap: anywhere; }

.footer { padding-top: 28px; padding-bottom: 40px; }
.footer p { margin: 0; font-size: .82rem; color: var(--muted); }

@media print {
  .topbar, .pareto, .cta, .skip { display: none; }
  body { background: #fff; color: #000; }
}