/* ================================================================
   OBSIDIAN CAPITAL RESEARCH — memo.css
   Styles for individual memo / essay pages
   ================================================================ */

/* ---- Memo Hero ---- */
.memo-hero {
  padding: calc(var(--nav-height) + 72px) 0 64px;
  border-bottom: 1px solid var(--border);
}
.memo-breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 40px;
}
.memo-breadcrumb a { color: var(--text-muted); transition: color 0.2s; }
.memo-breadcrumb a:hover { color: var(--accent); }
.memo-breadcrumb-sep { opacity: 0.4; }

.memo-type-label {
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.memo-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3vw, 2.75rem);
  font-weight: 300;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 16px;
  white-space: nowrap;
}
.memo-subtitle {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  font-style: italic;
  font-weight: 300;
  color: var(--accent-light);
  margin-bottom: 36px;
  max-width: 640px;
}
.memo-meta {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}
.memo-meta-author {
  font-size: 0.8rem;
  color: var(--text-secondary);
}
.memo-meta-author strong {
  color: var(--text-primary);
  font-weight: 500;
}
.memo-meta-divider {
  width: 1px;
  height: 14px;
  background: var(--border);
}
.memo-meta-item {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}
.memo-tags {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
  margin-top: 28px;
}

/* ---- Memo Body ---- */
.memo-layout {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 80px;
  align-items: start;
  padding: 72px 0 96px;
}

.memo-content {
  max-width: 680px;
}
.memo-content p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 2;
  margin-bottom: 28px;
}
.memo-content p:first-child { color: var(--text-primary); }
.memo-content h2 {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 400;
  color: var(--text-primary);
  line-height: 1.2;
  margin: 52px 0 20px;
}
.memo-content h2:first-child { margin-top: 0; }
.memo-content strong {
  color: var(--text-primary);
  font-weight: 500;
}
.memo-content em {
  font-style: italic;
  color: var(--text-primary);
}
.memo-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 52px 0;
}

/* ---- Sidebar ---- */
.memo-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 32px);
}
.memo-sidebar-block {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 20px;
}
.memo-sidebar-label {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.memo-sidebar-toc {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.memo-sidebar-toc li a {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.6;
  display: block;
  padding: 5px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s;
}
.memo-sidebar-toc li a:hover { color: var(--text-primary); }
.memo-sidebar-related {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.memo-sidebar-related a {
  color: var(--accent);
  transition: color 0.2s;
}
.memo-sidebar-related a:hover { color: var(--accent-light); }

/* ---- Footer Bar ---- */
.memo-footer-bar {
  border-top: 1px solid var(--border);
  padding: 40px 0;
}
.memo-footer-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.memo-back-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color 0.2s;
}
.memo-back-link:hover { color: var(--accent); }
.memo-back-link .arrow-left { transition: transform 0.22s; }
.memo-back-link:hover .arrow-left { transform: translateX(-4px); }

/* ---- Responsive ---- */
@media (max-width: 880px) {
  .memo-layout { grid-template-columns: 1fr; gap: 48px; }
  .memo-sidebar { position: static; }
}
@media (max-width: 600px) {
  .memo-hero { padding-top: calc(var(--nav-height) + 40px); }
  .memo-title { font-size: clamp(1.7rem, 7vw, 2.2rem); white-space: normal; }
}