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

/* ── Variables ──────────────────────────────────────── */
:root {
  --bg:      #f5f5f5;
  --ink:     #000000;
  --muted:   #bbbbbb;
  --dim:     #666666;
  --rule-lt: #e0e0e0;
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-hd: 'Playfair Display', Georgia, serif;
  --font-code: 'Menlo', 'Monaco', 'Courier New', monospace;
}

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


/* ── Layout ─────────────────────────────────────────── */
.page {
  max-width: 780px;
  margin: 0 auto;
  padding: 2rem 2.5rem 6rem;
}

/* ── Top Bar ────────────────────────────────────────── */
.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 3.5rem;
}

.site-name {
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
}

.back-link {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
  text-decoration: none;
  transition: color 0.2s;
}
.back-link:hover { color: var(--ink); }

/* ── Project Header ─────────────────────────────────── */
.project-header {
  margin-bottom: 3.5rem;
}

.project-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.6rem;
}

.project-title {
  font-family: var(--font-hd);
  font-weight: 900;
  font-size: clamp(2.5rem, 7vw, 5rem);
  line-height: 1.0;
  margin-bottom: 0.85rem;
}

.project-tags {
  font-size: 0.7rem;
  color: var(--dim);
  letter-spacing: 0.05em;
}

/* ── Sections ───────────────────────────────────────── */
.section {
  margin-bottom: 3rem;
}

.section-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--rule-lt);
  margin-bottom: 1.25rem;
}

.section-text {
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--ink);
}

.section-text + .section-text {
  margin-top: 0.75rem;
}

/* ── Code Blocks ────────────────────────────────────── */
.code-block {
  background: #e6e6e6;
  border-left: 3px solid var(--ink);
  padding: 1.25rem 1.5rem;
  margin: 1.25rem 0;
  overflow-x: auto;
}

.code-block pre {
  font-family: var(--font-code);
  font-size: 0.775rem;
  line-height: 1.7;
  color: #111;
  white-space: pre;
}

.code-caption {
  font-family: var(--font-code);
  font-size: 0.62rem;
  color: var(--dim);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: -0.5rem;
  margin-bottom: 1.25rem;
}

/* ── Flow List ──────────────────────────────────────── */
.flow-list {
  list-style: none;
  counter-reset: flow;
}

.flow-list li {
  counter-increment: flow;
  position: relative;
  display: block;
  padding: 0.8rem 0 0.8rem 2.5rem;
  border-bottom: 1px solid var(--rule-lt);
  font-size: 0.9rem;
  line-height: 1.6;
}

.flow-list li::before {
  content: counter(flow, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-code);
  font-size: 0.62rem;
  color: var(--muted);
}

/* ── Inline code inside flow-list ──────────────────── */
.flow-list li code {
  display: inline;
  font-family: inherit;
  font-size: inherit;
  background: #e8e8e8;
  color: var(--dim);
  padding: 0.05em 0.35em;
  border-radius: 3px;
}

/* ── CTA (fixed bottom-right) ───────────────────────── */
.cta {
  position: fixed;
  bottom: 2rem;
  right: 2.5rem;
  z-index: 50;
}

.cta-link {
  display: inline-block;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 0.15rem;
  transition: opacity 0.2s;
}
.cta-link:hover { opacity: 0.45; }

/* ── Responsive ─────────────────────────────────────── */
@media (max-width: 768px) {
  .page { padding: 1.5rem 1.5rem 4rem; }
}