/* Design tokens */
:root {
  --bg: #0a0a0b;
  --bg-raised: #111113;
  --text: #e8e6e1;
  --text-dim: #7a7770;
  --text-faint: #3d3b37;
  --accent: #c4a46c;
  --accent-dim: #8a7550;
  --serif: 'Newsreader', 'Georgia', serif;
  --mono: 'IBM Plex Mono', 'Menlo', monospace;
  --measure: 34em;
  --margin-note: 16em;
}

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

html {
  font-size: 18px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  line-height: 1.6;
}

/* Layout — Tufte wide margin */
.page {
  max-width: calc(var(--measure) + var(--margin-note) + 4em);
  margin: 0 auto;
  padding: 6rem 2rem 8rem;
}

/* Hero */
.hero {
  margin-bottom: 6rem;
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(4rem, 10vw, 8rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero h1 em {
  font-style: italic;
  color: var(--accent);
}

.subtitle {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Pipeline — horizontal flow */
.pipeline {
  margin: 5rem 0;
  display: flex;
  align-items: baseline;
  gap: 0;
  flex-wrap: wrap;
}

.pipeline-step {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  white-space: nowrap;
}

.pipeline-arrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-faint);
  padding: 0 0.75em;
}

/* Sections */
section {
  position: relative;
  margin-bottom: 5rem;
}

section h2 {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

section p {
  max-width: var(--measure);
  color: var(--text-dim);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 1rem;
}

/* Sidenote — Tufte style */
.sidenote {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-faint);
  line-height: 1.5;
  max-width: var(--margin-note);
  float: right;
  clear: right;
  margin-right: calc(-1 * var(--margin-note) - 2em);
  position: relative;
}

.sidenote::before {
  content: attr(data-ref);
  color: var(--accent-dim);
  font-size: 0.6rem;
  vertical-align: super;
  margin-right: 0.3em;
}

.ref {
  color: var(--accent-dim);
  font-family: var(--mono);
  font-size: 0.6rem;
  vertical-align: super;
  cursor: default;
}

/* Stats row — small multiples */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10em, 1fr));
  gap: 2rem;
  margin: 4rem 0;
  border-top: 1px solid var(--text-faint);
  padding-top: 2rem;
}

.stat-value {
  font-family: var(--serif);
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
}

.stat-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.5rem;
}

/* Handlers list */
.handlers {
  list-style: none;
  border-top: 1px solid var(--text-faint);
}

.handlers li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 1rem 0;
  border-bottom: 1px solid var(--text-faint);
}

.handler-name {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 600;
}

.handler-detail {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* Code block */
.code-block {
  background: var(--bg-raised);
  padding: 1.5rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--text-dim);
  overflow-x: auto;
  border-left: 2px solid var(--accent-dim);
  margin: 2rem 0;
  max-width: var(--measure);
}

.code-block .accent { color: var(--accent); }
.code-block .dim { color: var(--text-faint); }

/* Inline code */
.path-code {
  font-family: var(--mono);
  font-size: 0.85em;
  color: var(--accent);
}

/* CTA */
.cta {
  border-top: 1px solid var(--accent-dim);
  padding-top: 4rem;
  margin-top: 6rem;
}

.cta-link {
  display: inline-block;
  margin-top: 1.5rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--bg);
  background: var(--accent);
  padding: 0.9em 2em;
  text-decoration: none;
  letter-spacing: 0.03em;
  transition: background 0.2s ease;
}

.cta-link:hover {
  background: var(--text);
}

/* Footer */
footer {
  margin-top: 8rem;
  padding-top: 2rem;
  border-top: 1px solid var(--text-faint);
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-faint);
  display: flex;
  justify-content: space-between;
}

/* Responsive — collapse sidenotes inline on narrow screens */
@media (max-width: 60em) {
  .sidenote {
    float: none;
    margin: 1rem 0;
    max-width: 100%;
    display: block;
    padding-left: 1em;
    border-left: 1px solid var(--text-faint);
  }
}

@media (max-width: 36em) {
  .hero h1 {
    font-size: 3.2rem;
  }

  section h2 {
    font-size: 2rem;
  }

  .pipeline {
    flex-direction: column;
    gap: 0.25rem;
  }

  .pipeline-arrow {
    transform: rotate(90deg);
    display: inline-block;
    padding: 0.25em 0;
  }

  .handlers li {
    flex-direction: column;
    gap: 0.25rem;
  }
}