:root {
  --paper: #FAF6F0;
  --card: #FFFFFF;
  --ink: #2B2A26;
  --ink-soft: #6B675C;
  --ink-faint: #9A9587;
  --border: #E4DCCB;
  --placeholder-fill: #F1E9DC;
  --accent: #5C7C99;
  --accent-tint: rgba(92, 124, 153, 0.14);
}
html, body { margin: 0; padding: 0; background: var(--paper); }
a { text-decoration: none; }
* { box-sizing: border-box; }
body {
  font-family: 'Work Sans', ui-sans-serif, system-ui, sans-serif;
  color: var(--ink);
}
.wrap { width: 100%; max-width: 900px; margin: 0 auto; background: var(--paper); }

/* HEADER */
header {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 44px;
  border-bottom: 1px solid var(--border);
  max-width: 900px;
  margin: 0 auto;
}
.wordmark {
  font-family: 'Spectral', ui-serif, Georgia, serif;
  font-style: italic;
  font-weight: 500;
  font-size: 22px;
  color: var(--ink);
}
.back-link {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 13px;
  color: var(--ink-soft);
  transition: color 150ms;
}
.back-link:hover { color: var(--accent); }

main { padding: 64px 44px 96px; }

.eyebrow {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 16px;
}

.tag-pill {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--accent-tint);
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 20px;
}

h1.cs-title {
  font-family: 'Spectral', ui-serif, Georgia, serif;
  font-size: 52px;
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}

.cs-meta {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
  margin-bottom: 28px;
}

.cs-lead {
  font-size: 19px;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 680px;
  margin: 0 0 48px;
}

/* STATS */
.cs-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 56px;
  padding: 28px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cs-stat { display: flex; flex-direction: column; gap: 6px; }
.cs-stat .stat-line {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 13px;
  color: var(--ink);
  line-height: 1.5;
}

/* SECTIONS */
.cs-section { margin-bottom: 48px; }
.cs-section h2 {
  font-family: 'Spectral', ui-serif, Georgia, serif;
  font-size: 26px;
  font-weight: 500;
  margin: 0 0 16px;
}
.cs-section p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 680px;
  margin: 0 0 16px;
}
.cs-section p:last-child { margin-bottom: 0; }

/* RETRO SAMPLE */
.retro-sample {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  margin: 8px 0 0;
}
.retro-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-bottom: 18px;
}
.retro-stat {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--ink);
  background: var(--placeholder-fill);
  border-radius: 999px;
  padding: 6px 14px;
}
.retro-sample blockquote {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
  font-style: italic;
  border-left: 2px solid var(--accent);
  padding-left: 16px;
  margin: 0 0 14px;
}
.retro-sample blockquote:last-child { margin-bottom: 0; }

/* CLOSING */
.cs-closing {
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 26px; background: var(--accent); color: var(--paper);
  border: none; border-radius: 10px;
  font-family: 'Work Sans', ui-sans-serif, system-ui, sans-serif;
  font-size: 14px; font-weight: 500; cursor: pointer;
  box-shadow: 0 4px 14px rgba(43,42,38,0.08);
  transition: box-shadow 150ms, transform 150ms;
}
.btn-primary:hover { box-shadow: 0 10px 28px rgba(43,42,38,0.16); transform: translateY(-2px); }
.btn-primary:active { transform: translateY(1px); }

.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 26px; background: transparent; color: var(--ink);
  border: 1px solid var(--ink); border-radius: 10px;
  font-family: 'Work Sans', ui-sans-serif, system-ui, sans-serif;
  font-size: 14px; font-weight: 500; cursor: pointer;
  transition: background 150ms;
}
.btn-secondary:hover { background: var(--placeholder-fill); }

/* FOOTER */
footer {
  padding: 24px 44px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--ink-faint);
  max-width: 900px;
  margin: 0 auto;
}
footer a { color: var(--ink-faint); transition: color 150ms; }
footer a:hover { color: var(--accent); }

@media (max-width: 640px) {
  header { padding: 0 24px; }
  main { padding: 40px 24px 64px; }
  h1.cs-title { font-size: 36px; }
  .cs-lead { font-size: 17px; }
  .cs-stats { grid-template-columns: 1fr 1fr; }
  footer { padding: 20px 24px; flex-direction: column; gap: 8px; }
}