:root {
  --bg: #fafbfc;
  --grid: rgba(80, 130, 200, 0.18);
  --ink: #15171a;
  --ink-muted: #6b7280;
  --rule: rgba(20, 30, 50, 0.12);
  --accent: #0a3b2e;
  --sans: 'Instrument Sans', system-ui, sans-serif;
  --serif: 'Newsreader', Georgia, serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    linear-gradient(to right, var(--grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid) 1px, transparent 1px);
  background-size: 28px 28px;
  background-position: -1px -1px;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  padding: 56px 36px 56px 44px;
  border-right: 1px solid var(--rule);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.name {
  font-family: var(--sans);
  font-weight: 400;
  font-size: 32px;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 12px;
  cursor: pointer;
  color: inherit;
  text-decoration: none;
  display: block;
}

.nav-group { margin-bottom: 12px; }

.nav-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  padding: 8px 0;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--ink);
  text-transform: uppercase;
  cursor: pointer;
  text-align: left;
  transition: opacity 150ms ease;
}

.nav-heading:hover { opacity: 0.55; }

.nav-heading .chev {
  font-size: 12px;
  transition: transform 220ms ease;
  opacity: 0.45;
  display: inline-block;
}

.nav-group.open .chev { transform: rotate(90deg); }

.nav-list {
  list-style: none;
  overflow: hidden;
  max-height: 0;
  transition: max-height 260ms ease;
}

.nav-group.open .nav-list { max-height: 600px; }

.nav-list li {
  padding: 7px 0 7px 14px;
  font-family: var(--serif);
  font-size: 14px;
  font-style: italic;
  color: var(--ink-muted);
  cursor: pointer;
  line-height: 1.3;
  transition: color 150ms ease;
}

.nav-list li:hover,
.nav-list li.active {
  color: var(--accent);
}

/* Nav items are real links now; keep them visually identical to the old <li> */
.nav-list li a {
  color: inherit;
  text-decoration: none;
  display: block;
}

.nav-link {
  display: block;
  padding: 6px 0;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--ink-muted);
  text-transform: uppercase;
  text-decoration: none;
  transition: color 150ms ease;
}

.nav-link:hover { color: var(--ink); }

.project-list {
  margin-top: 28px;
  display: grid;
  gap: 16px;
}

.project-card {
  padding: 14px 0 16px 0;
  border-bottom: 1px solid var(--rule);
}

.project-card:last-child {
  border-bottom: none;
}

.project-card h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 20px;
  margin-bottom: 6px;
}

.project-card p {
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-muted);
  margin-bottom: 0;
}

.divider {
  height: 0px;
  background: var(--rule);
  margin: 32px 0 38px 0;
}

/* Main */
.main { padding: 88px 72px; }

.content { max-width: 768px; }

.eyebrow {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 20px;
}


.content h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 44px;
  letter-spacing: -0.01em;
  line-height: 1.1;
  margin-bottom: 24px;
}

.content .meta {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  margin-bottom: 36px;
  text-transform: uppercase;
}

.content p {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.65;
  margin-bottom: 20px;
}

/* Footnotes */
.footnote-ref {
  font-size: 0.65em;
  vertical-align: super;
  line-height: 0;
  cursor: pointer;
  color: var(--accent);
  text-decoration: none;
  transition: opacity 150ms ease;
}

.footnote-ref:hover {
  opacity: 0.7;
  text-decoration: underline;
}

.footnotes {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  font-size: 14px;
  line-height: 1.6;
}

.footnotes ol {
  list-style-position: inside;
  margin-left: 0;
  padding-left: 0;
}

.footnotes li {
  margin-bottom: 12px;
  color: var(--ink-muted);
}

.footnotes li p {
  display: inline;
  font-size: 14px;
  margin-bottom: 0;
}

.footnote-backref {
  margin-left: 6px;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9em;
  transition: opacity 150ms ease;
}

.footnote-backref:hover {
  opacity: 0.7;
  text-decoration: underline;
}

/* Figures / chart captions */
.content figure {
  margin: 40px 0;
}

.content figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: #fff;
}

.content figcaption {
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-muted);
  margin-top: 12px;
  border-left: 0px solid var(--rule);
  padding-left: 12px;
}

.content figure.chart-small img {
  max-width: 80%;
}

.featured {
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--rule);
}

.featured-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 20px;
}

.featured-item {
  display: block;
  text-decoration: none;
  color: inherit;
  padding: 14px 0;
  cursor: pointer;
  border-bottom: 1px solid var(--rule);
  transition: padding-left 200ms ease;
}

.featured-item:hover { padding-left: 10px; }

.featured-item h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 19px;
  margin-bottom: 4px;
}

.featured-item .tag {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-muted);
  text-transform: uppercase;
}

@media (max-width: 800px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--rule);
    padding: 32px 28px;
  }
  .name { margin-bottom: 28px; font-size: 28px; }
  .main { padding: 48px 28px; }
  .content h1 { font-size: 32px; }
}