@import url('https://fonts.googleapis.com/css2?family=DM+Mono:ital,wght@0,300;0,400;0,500;1,300&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,300&display=swap');

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

:root {
  --bg: #f8f7f5;
  --surface: #ffffff;
  --border: #e4e2dc;
  --border-subtle: #f0ede8;
  --text: #1a1917;
  --text-secondary: #6b6860;
  --text-tertiary: #a09d98;
  --accent: #6b2fa0;
  --accent-light: #f3eefa;
  --accent-mid: #9b5fc0;
  --mono: 'DM Mono', monospace;
  --sans: 'DM Sans', sans-serif;
  --radius: 8px;
  --radius-lg: 14px;
  --max-w: 860px;
  --nav-h: 64px;
}

html { font-size: 16px; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
}

/* ── Nav ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(248,247,245,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 2rem;
}

.nav-inner {
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo img {
  height: 32px;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  gap: 0;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 6px 14px;
  font-size: 13.5px;
  font-weight: 400;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 0.01em;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}

.nav-links a:hover { color: var(--text); background: var(--border-subtle); }
.nav-links a.active { color: var(--accent); font-weight: 500; }

/* ── Page layout ── */
main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 2rem 5rem;
}

/* ── Typography ── */
h1 {
  font-family: var(--sans);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--text);
}

h2 {
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin: 3rem 0 1rem;
}

h3 {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  margin: 1.5rem 0 0.5rem;
}

p { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Hero ── */
.hero {
  padding: 3.5rem 0 2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 3rem;
}

.hero-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.05rem;
  max-width: 560px;
  margin-top: 1rem;
}

/* ── Stat cards ── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin: 2rem 0;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1rem;
}

.stat-label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 6px;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 300;
  letter-spacing: -0.03em;
  color: var(--text);
  line-height: 1;
}

.stat-sub {
  font-size: 11.5px;
  color: var(--text-tertiary);
  margin-top: 4px;
  font-family: var(--mono);
}

/* ── Chart containers ── */
.chart-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.chart-title {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 1rem;
}

.chart-legend {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.chart-legend span {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-secondary);
}

.chart-legend i {
  display: inline-block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
}

.chart-legend i.bar {
  height: 10px;
  border-radius: 2px;
}

/* ── Section prose ── */
.section {
  margin: 3rem 0;
}

.section-intro {
  max-width: 600px;
  margin-bottom: 1.5rem;
}

/* ── Insight callout ── */
.insight {
  border-left: 2px solid var(--accent);
  padding: 0.75rem 1.25rem;
  background: var(--accent-light);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.5rem 0;
}

.insight p { color: var(--text); font-size: 0.9rem; margin: 0; }

/* ── Data table ── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 12.5px;
  margin: 1rem 0;
}

.data-table th {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text-tertiary);
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 10.5px;
}

.data-table td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--bg); }

/* ── Timeline marker ── */
.timeline {
  position: relative;
  padding-left: 2rem;
  margin: 2rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  margin-bottom: 1.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.7rem;
  top: 7px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 1px var(--accent);
}

.timeline-date {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-tertiary);
  letter-spacing: 0.06em;
  margin-bottom: 2px;
}

.timeline-text { font-size: 0.9rem; color: var(--text-secondary); }

/* ── Project card (homepage) ── */
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  text-decoration: none;
  display: block;
  color: inherit;
}

.project-card:hover {
  border-color: var(--accent-mid);
  box-shadow: 0 2px 16px rgba(107,47,160,0.07);
  text-decoration: none;
}

.project-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  border-radius: 4px;
  padding: 2px 8px;
  display: inline-block;
  margin-bottom: 10px;
}

.project-card h3 {
  font-size: 1.1rem;
  font-weight: 500;
  margin: 0 0 6px;
  color: var(--text);
}

.project-card p { font-size: 0.875rem; margin: 0; }

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
}

footer p {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-tertiary);
  letter-spacing: 0.05em;
  margin: 0;
}

/* ── Responsive ── */
@media (max-width: 600px) {
  main { padding: 2rem 1.25rem 4rem; }
  nav { padding: 0 1.25rem; }
  .nav-links a { padding: 6px 10px; font-size: 13px; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
}