/* ===== blog-page.html / SSR post page extras ===== */

/* Narrow article column. */
.container { max-width: 760px; }

.page-header {
  padding: 140px 0 40px;
  position: relative;
  overflow: hidden;
}
.page-header::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 400px;
  background: radial-gradient(ellipse 50% 50% at 50% 40%, rgba(139, 92, 246, 0.06) 0%, transparent 70%);
  pointer-events: none;
}
.label {
  font: 600 12px/1 var(--font-m);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.label-purple { color: var(--purple); }
.label-cyan { color: var(--cyan); }
.page-header h1 {
  font: 700 clamp(28px, 4.2vw, 44px)/1.15 var(--font-d);
  letter-spacing: -0.03em;
  color: #fff;
  margin-bottom: 20px;
}
.post-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--muted);
}
.post-tag {
  padding: 4px 12px;
  border-radius: 6px;
  font: 600 11px/1 var(--font-m);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.post-tag.research { background: rgba(0, 212, 255, 0.08); color: var(--cyan); }
.post-tag.engineering { background: rgba(139, 92, 246, 0.08); color: var(--purple); }
.post-tag.product { background: rgba(16, 185, 129, 0.08); color: var(--green); }
.post-tag.insight { background: rgba(245, 158, 11, 0.08); color: var(--amber); }
.post-meta .dot { opacity: 0.4; }

.breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 32px;
  font-family: var(--font-m);
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb .sep { opacity: 0.4; }

.post-hero {
  width: 100%;
  height: 280px;
  background: linear-gradient(135deg, var(--surface2), var(--surface));
  border: 1px solid var(--border);
  border-radius: var(--r);
  margin-bottom: 48px;
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
}
.post-hero::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: var(--purple);
  filter: blur(100px);
  opacity: 0.1;
  top: -50px;
  left: 30%;
}
.post-hero-icon {
  font-size: 48px;
  color: var(--purple);
  opacity: 0.8;
  position: relative;
  z-index: 1;
}

.content { padding: 0 0 80px; }
.content h2 {
  font: 700 24px/1.3 var(--font-d);
  color: #fff;
  margin: 40px 0 16px;
  letter-spacing: -0.02em;
}
.content p {
  font-size: 17px;
  line-height: 1.85;
  color: var(--fg2);
  margin-bottom: 20px;
}
.content p strong { color: #fff; font-weight: 600; }
.content ul, .content ol {
  margin: 0 0 20px 24px;
  color: var(--fg2);
}
.content li { margin-bottom: 8px; line-height: 1.75; }

.code-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 20px 24px;
  margin: 24px 0;
  overflow-x: auto;
}
.code-block pre {
  font: 400 14px/1.6 var(--font-m);
  color: var(--fg2);
  white-space: pre;
}
.code-block .cm { color: var(--muted); }

.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--purple);
  border-radius: var(--r-sm);
  padding: 20px 24px;
  margin: 32px 0;
}
.callout p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--fg);
}

.author-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px;
  margin-top: 48px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
}
.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  display: grid;
  place-items: center;
  font: 700 16px/1 var(--font-d);
  color: #fff;
  flex-shrink: 0;
}
.author-info .name {
  font: 600 15px/1 var(--font-b);
  color: #fff;
  margin-bottom: 4px;
}
.author-info .role { font-size: 13px; color: var(--muted); }

.share-row {
  display: flex;
  gap: 12px;
  margin-top: 32px;
  align-items: center;
}
.share-label {
  font: 500 13px/1 var(--font-m);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-right: 8px;
}
.share-btn {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
  font-size: 14px;
  text-decoration: none;
}
.share-btn:hover { color: var(--cyan); border-color: rgba(0, 212, 255, 0.3); }

.nav-card {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.nav-card a {
  flex: 1;
  padding: 20px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  transition: border-color 0.3s, transform 0.3s;
}
.nav-card a:hover { transform: translateY(-2px); border-color: rgba(139, 92, 246, 0.15); }
.nav-card .nc-label {
  font: 500 12px/1 var(--font-m);
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.nav-card .nc-title { font: 600 15px/1.3 var(--font-d); color: #fff; }

@media (max-width: 640px) {
  .page-header { padding: 110px 0 24px; }
  .post-hero { height: 200px; margin-bottom: 32px; }
  .nav-card { flex-direction: column; }
}