:root {
  /* Brand palette */
  --black: #000000;
  --copper: #cb7048;          /* Dark Copper: headings, rules, accents (large text only) */
  --copper-light: #d89375;    /* Other Copper: decorative */
  --olive: #84846e;           /* Gray Olive: rules, decorative */
  --brown: #513c2c;           /* Dark Gray Brown: body text */

  /* Derived for accessible small text (WCAG AA on --paper) */
  --copper-ink: #9a4f2c;
  --olive-ink: #63634e;

  --paper: #faf8f4;
  --paper-2: #f2eee6;
  --rule: #ddd6c9;

  --serif: 'Cardo', Georgia, serif;
  --sans: 'IBM Plex Sans', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;

  --max: 1080px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--brown);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--copper-ink); text-decoration-color: var(--copper-light); text-underline-offset: 3px; }
a:hover { color: var(--copper); }

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

/* ---------- Header ---------- */
header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(250, 248, 244, 0.94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--rule);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 0.6rem 1rem; padding-block: 0.85rem;
}
.brand { display: flex; align-items: center; gap: 0.75rem; text-decoration: none; }
.brand svg, .brand img { width: 40px; height: 40px; flex: none; }
.brand-name {
  font-family: var(--serif); font-weight: 700; font-size: 1.35rem;
  color: var(--copper); letter-spacing: 0.01em; line-height: 1;
}
nav { display: flex; gap: 1.75rem; }
nav a { font-size: 0.9rem; font-weight: 500; color: var(--olive-ink); text-decoration: none; }
nav a:hover { color: var(--copper-ink); }

/* ---------- Hero ---------- */
.hero { padding: 5.5rem 0 4.5rem; border-bottom: 1px solid var(--rule); }
.eyebrow {
  font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--olive-ink); margin-bottom: 1.25rem;
}
.hero h1 {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(2.3rem, 5.5vw, 3.6rem); line-height: 1.1;
  color: var(--black); text-wrap: balance; margin-bottom: 1.5rem;
}
.hero h1 em { font-style: italic; color: var(--copper); }
.lede { font-size: 1.2rem; line-height: 1.6; max-width: 40rem; margin-bottom: 2rem; }
.tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tags span {
  font-family: var(--mono); font-size: 0.78rem; color: var(--brown);
  border: 1px solid var(--rule); background: #fff;
  padding: 0.3rem 0.65rem; border-radius: 2px;
}

/* ---------- Sections ---------- */
section { padding: 4.5rem 0; border-bottom: 1px solid var(--rule); }
.section-head { display: flex; align-items: baseline; gap: 1rem; margin-bottom: 2.25rem; }
.section-num { font-family: var(--mono); font-size: 0.85rem; color: var(--copper-ink); }
.section-head h2 {
  font-family: var(--serif); font-weight: 700; font-size: 1.9rem;
  color: var(--black); line-height: 1.2;
}
h3 {
  font-family: var(--serif); font-weight: 700; font-size: 1.3rem;
  color: var(--black); line-height: 1.25; margin-bottom: 0.5rem;
}
.intro { max-width: 42rem; margin-bottom: 2.5rem; font-size: 1.1rem; }

/* Focus areas: equal-weight grid */
.focus-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 0 3rem;
}
.focus-item { padding: 1.5rem 0; border-top: 1px solid var(--rule); }
.focus-item:nth-last-child(-n+2) { border-bottom: 1px solid var(--rule); }

/* Approach */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; counter-reset: step; }
.step { border-left: 2px solid var(--copper-light); padding-left: 1.25rem; }
.step::before {
  counter-increment: step; content: "0" counter(step);
  display: block; font-family: var(--mono); font-size: 0.8rem;
  color: var(--copper-ink); margin-bottom: 0.35rem;
}
.step h3 { font-size: 1.2rem; }
.step p { font-size: 0.98rem; }

/* Selected work: expandable categories */
.work-note { font-size: 0.92rem; color: var(--olive-ink); margin: -1rem 0 1.75rem; }
details.cat {
  border-top: 1px solid var(--rule);
}
details.cat:last-of-type { border-bottom: 1px solid var(--rule); }
details.cat summary {
  list-style: none; cursor: pointer;
  display: grid; grid-template-columns: 1fr auto; gap: 0.25rem 1.5rem;
  align-items: center; padding: 1.4rem 0;
}
details.cat summary::-webkit-details-marker { display: none; }
details.cat summary:focus-visible { outline: 2px solid var(--copper); outline-offset: 4px; }
.cat-title { font-family: var(--serif); font-weight: 700; font-size: 1.35rem; color: var(--black); line-height: 1.25; }
.cat-sub { grid-column: 1; font-size: 0.95rem; color: var(--olive-ink); }
.cat-toggle {
  grid-column: 2; grid-row: 1 / span 2;
  width: 2rem; height: 2rem; border: 1px solid var(--rule); border-radius: 50%;
  display: grid; place-items: center; background: #fff;
  font-family: var(--mono); color: var(--copper-ink); font-size: 1.1rem;
  transition: transform 0.2s ease;
}
details.cat[open] .cat-toggle { transform: rotate(45deg); }
details.cat summary:hover .cat-title { color: var(--copper-ink); }

.work { list-style: none; padding: 0 0 1.5rem; }
.work li {
  display: grid; grid-template-columns: 9rem 1fr; gap: 1.5rem;
  padding: 0.9rem 0; border-top: 1px dashed var(--rule);
}
.work .meta {
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.03em;
  color: var(--olive-ink); padding-top: 0.2rem;
}
.work h4 { font-family: var(--sans); font-weight: 600; font-size: 1rem; color: var(--black); }
.work p { font-size: 0.95rem; }

/* Experience items flagged `placeholder: true` in content.yaml */
.work li.placeholder { background: repeating-linear-gradient(-45deg, transparent 0 8px, rgba(203,112,72,0.06) 8px 16px); padding-left: 0.75rem; padding-right: 0.75rem; }
.work li.placeholder h4, .work li.placeholder p { color: var(--copper-ink); font-style: italic; }

/* Background */
.bg-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 3.5rem; }
.bio p + p { margin-top: 1rem; }
.bio .name { font-family: var(--serif); font-size: 1.5rem; color: var(--black); margin-bottom: 0.25rem; }
.bio .title { font-family: var(--mono); font-size: 0.8rem; color: var(--olive-ink); margin-bottom: 1.25rem; letter-spacing: 0.03em; }
.side h4 {
  font-family: var(--mono); font-size: 0.75rem; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--copper-ink);
  margin-bottom: 0.6rem;
}
.side ul { list-style: none; margin-bottom: 2rem; }
.side li { padding: 0.45rem 0; border-bottom: 1px solid var(--rule); font-size: 0.95rem; }
.side li:first-child { border-top: 1px solid var(--rule); }
.side .pub { font-size: 0.92rem; line-height: 1.5; }
.side .pub cite { font-style: italic; color: var(--olive-ink); }
.side .pub a { color: var(--brown); text-decoration-color: var(--rule); }
.side .pub a:hover { color: var(--copper-ink); text-decoration-color: var(--copper-light); }
.side .pub a::after { content: " ↗"; font-size: 0.8em; color: var(--copper-ink); }
.side .more { font-size: 0.9rem; margin-top: -1.25rem; margin-bottom: 2rem; }

/* Contact */
.contact { background: var(--paper-2); border-bottom: none; }
.contact-inner { display: grid; grid-template-columns: 1.2fr 1fr; gap: 3rem; align-items: start; }
.contact h2 { font-family: var(--serif); font-size: 2rem; font-weight: 400; color: var(--black); line-height: 1.25; }
.contact h2 em { color: var(--copper); }
.contact-links { list-style: none; }
.contact-links li {
  display: flex; justify-content: space-between; gap: 1rem;
  padding: 0.8rem 0; border-bottom: 1px solid var(--rule);
}
.contact-links li:first-child { border-top: 1px solid var(--rule); }
.contact-links .label { font-family: var(--mono); font-size: 0.8rem; color: var(--olive-ink); text-transform: uppercase; letter-spacing: 0.06em; padding-top: 0.15rem; }
.contact-links a { font-weight: 500; text-align: right; word-break: break-word; }

footer { background: var(--brown); color: #e9e2d6; font-size: 0.85rem; padding: 1.5rem 0; }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem; }

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
  .steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  .bg-grid, .contact-inner { grid-template-columns: 1fr; gap: 1.5rem; }
  .focus-grid { grid-template-columns: 1fr; }
  .focus-item:nth-last-child(-n+2) { border-bottom: none; }
  .focus-item:last-child { border-bottom: 1px solid var(--rule); }
  .work li { grid-template-columns: 1fr; gap: 0.2rem; }
}
@media (max-width: 640px) {
  .header-inner { flex-direction: column; align-items: flex-start; gap: 0.6rem; padding-block: 0.7rem; }
  nav { flex-wrap: wrap; gap: 0.3rem 1.1rem; width: 100%; }
  nav a { font-size: 0.85rem; white-space: nowrap; }
  .hero { padding: 3.5rem 0 3rem; }
  section { padding: 3.25rem 0; }
  .section-head h2 { font-size: 1.6rem; }
  .steps { grid-template-columns: 1fr; gap: 1.5rem; }
  .cat-title { font-size: 1.2rem; }
  html { scroll-padding-top: 110px; }
}