/* ─── RESET ──────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
* { border-radius: 0 !important; }

/* ─── TOKENS ─────────────────────────────────────────────────────────────── */
:root {
  --bg:           #e8f2ed;
  --surface:      #d5e6db;
  --surface-2:    #eff7f2;
  --text:         #0d1a0f;
  --text-muted:   rgba(13,26,15,0.60);
  --text-dim:     rgba(13,26,15,0.35);
  --accent:       #1a5c3a;
  --accent-hover: #2d7a52;
  --accent-dark:  #0d3d25;
  --accent-fill:  rgba(26,92,58,0.12);
  --border:       rgba(0,0,0,0.10);
  --border-solid: rgba(0,0,0,0.18);
  --font-head:    'Space Grotesk', sans-serif;
  --font-mono:    'IBM Plex Mono', monospace;
}

/* ─── BASE ───────────────────────────────────────────────────────────────── */
html { scroll-behavior: smooth; }
html, body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

body { opacity: 0; transition: opacity 0.4s ease; }
body.visible { opacity: 1; }

a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: var(--font-mono); background: none; border: none; }
::selection { background: var(--accent); color: var(--bg); }

/* ─── NAV ────────────────────────────────────────────────────────────────── */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 48px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 100;
}

.nav-logo {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text);
  transition: color 0.15s;
}
.nav-logo:hover { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.nav-link {
  color: var(--text-muted);
  padding: 6px 20px;
  border-left: 1px solid var(--border);
  transition: color 0.15s, background 0.15s;
}
.nav-link:last-child { border-right: 1px solid var(--border); }
.nav-link:hover, .nav-link.active { color: var(--bg); background: var(--accent); }

/* ─── FOOTER ─────────────────────────────────────────────────────────────── */
.footer {
  margin-top: auto;
  padding: 24px 48px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-text { font-size: 11px; color: var(--text-dim); letter-spacing: 0.06em; }
.footer-accent { color: var(--accent); }

/* ─── PAGE WRAPPER ───────────────────────────────────────────────────────── */
.page { min-height: 100vh; display: flex; flex-direction: column; }
.main { flex: 1; }

/* ─── DECORATIVE ─────────────────────────────────────────────────────────── */
.crosshair::before, .crosshair::after {
  content: '';
  position: absolute;
  background: var(--border-solid);
}
.crosshair::before { width: 1px; height: 12px; top: -6px; left: 50%; }
.crosshair::after  { width: 12px; height: 1px; top: 0; left: calc(50% - 6px); }

/* ─── TAGS ───────────────────────────────────────────────────────────────── */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 3px 10px;
  border: 1px solid var(--accent);
  color: var(--accent);
  transition: all 0.15s;
}
.tag:hover, .tag.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #e8f2ed;
}

/* ─── BUTTONS ────────────────────────────────────────────────────────────── */
.btn-back {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-back:hover { color: var(--accent); }

/* ─── ESSAY DETAIL ───────────────────────────────────────────────────────── */
.essay-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 0;
  min-height: calc(100vh - 61px);
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.essay-sidebar {
  border-right: 1px solid var(--border);
  padding: 48px 32px;
  position: sticky;
  top: 61px;
  height: calc(100vh - 61px);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.essay-sidebar-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.essay-sidebar-value {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

.essay-content {
  padding: 64px 72px 80px;
  max-width: 740px;
}

.essay-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 48px);
  letter-spacing: -0.035em;
  line-height: 1.1;
  margin-bottom: 24px;
  text-wrap: pretty;
}

.essay-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  border-left: 2px solid var(--accent-dark);
  padding-left: 20px;
  margin-bottom: 48px;
}

.essay-body p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.9;
  margin-bottom: 28px;
}

.essay-body h2 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.025em;
  color: var(--text);
  margin: 52px 0 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.essay-body h2::before {
  content: '§';
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  opacity: 0.8;
}

/* Pull quote */
.pull-quote {
  margin: 48px -72px;
  padding: 36px 72px;
  border-top: 1px solid var(--border-solid);
  border-bottom: 1px solid var(--border-solid);
  background: var(--surface-2);
}

.pull-quote blockquote {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 34px);
  letter-spacing: -0.03em;
  line-height: 1.25;
  color: var(--text);
}

.pull-quote cite {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 16px;
  font-style: normal;
}

/* References */
.references {
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.references-heading {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 24px;
}

.reference-item {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 0 12px;
  margin-bottom: 12px;
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.6;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.reference-item:last-child { border-bottom: none; }

.ref-num {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 10px;
  padding-top: 2px;
}

.ref-text { font-family: var(--font-mono); }
.ref-text em { font-style: italic; color: var(--text-muted); }
.ref-text a { color: var(--accent); text-decoration: underline; text-decoration-color: var(--accent-dark); }

/* ─── BOOK REVIEW ────────────────────────────────────────────────────────── */
.review-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 0;
  min-height: calc(100vh - 61px);
  max-width: 1160px;
  margin: 0 auto;
  width: 100%;
}

.review-cover-panel {
  border-right: 1px solid var(--border);
  padding: 48px 32px;
  position: sticky;
  top: 61px;
  height: calc(100vh - 61px);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.book-cover-placeholder {
  width: 100%;
  aspect-ratio: 2/3;
  background: var(--accent-dark);
  border: 1px solid var(--border-solid);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
  position: relative;
  overflow: hidden;
}

.book-cover-initials {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 56px;
  letter-spacing: -0.04em;
  color: #e8f2ed;
  user-select: none;
}

.book-cover-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px 16px;
  background: var(--accent-dark);
  font-family: var(--font-mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-hover);
  text-align: center;
}

.review-meta-item { margin-bottom: 24px; }
.review-meta-label {
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  margin-bottom: 4px;
}
.review-meta-value { font-size: 13px; color: var(--text-muted); }

.review-content { padding: 64px 72px 80px; max-width: 740px; }

.review-book-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(32px, 5vw, 60px);
  letter-spacing: -0.04em;
  line-height: 1.0;
  margin-bottom: 12px;
}

.review-author {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent);
  margin-bottom: 48px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-author::before {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--accent-dark);
}

/* Book pull quote (epigraph) */
.book-epigraph {
  border-left: 2px solid var(--accent);
  padding: 20px 24px;
  margin-bottom: 48px;
  background: var(--surface-2);
}

.book-epigraph blockquote {
  font-family: var(--font-head);
  font-style: italic;
  font-size: 17px;
  letter-spacing: -0.02em;
  line-height: 1.5;
  color: var(--text);
}

.book-epigraph cite {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 12px;
  font-style: normal;
}

.review-body p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.9;
  margin-bottom: 28px;
}

.review-rating {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 48px;
}

.rating-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
}

.rating-dots {
  display: flex;
  gap: 6px;
}

.rating-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-dark);
}

.rating-dot.filled { background: var(--accent); }

/* ─── RESPONSIVE ─────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav { padding: 16px 20px; }
  .nav-link { padding: 6px 12px; }

  .essay-layout {
    grid-template-columns: 1fr;
  }

  .essay-sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 32px 20px;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 20px;
  }

  .essay-content {
    padding: 40px 20px 60px;
  }

  .pull-quote {
    margin: 40px -20px;
    padding: 28px 20px;
  }

  .review-layout {
    grid-template-columns: 1fr;
  }

  .review-cover-panel {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 32px 20px;
    flex-direction: row;
    align-items: flex-start;
    gap: 24px;
  }

  .book-cover-placeholder {
    width: 120px;
    flex-shrink: 0;
    margin-bottom: 0;
  }

  .review-content {
    padding: 40px 20px 60px;
  }

  .footer { padding: 20px; flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 480px) {
  .essay-sidebar { flex-direction: column; }
  .review-cover-panel { flex-direction: column; }
  .book-cover-placeholder { width: 100%; }
}