/* ============================================================
   lab-articles.css — Lab essays section + articles grid
   ============================================================ */

/* ── Essays section wrapper ── */
.lab-essays-section {
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.lab-essays-inner {
  max-width: 860px;
  margin: 0 auto;
  padding: 4rem 4rem 2rem;
}
.lab-essays-inner .section-title { margin-bottom: 1.5rem; }
.lab-essays-inner .cs-index { margin-bottom: 3rem; }

/* ── Articles section ── */
.lab-articles-section {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 5rem 4rem 6rem;
}
.lab-articles-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.lab-articles-inner .section-title { margin-bottom: 0.6rem; }
.lab-articles-inner .section-sub { margin-bottom: 3rem; }

/* Articles grid — 3 columns */
.lab-articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* Article card */
.lab-article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.3s, transform 0.35s var(--ease), box-shadow 0.3s;
}
.lab-article-card:hover {
  border-color: rgba(245,200,66,0.3);
  transform: translateY(-5px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.3);
}

/* Article image placeholder */
.lab-article-img {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.lab-art-1  { background: linear-gradient(135deg, #0a1428 0%, #1a0820 100%); }
.lab-art-2  { background: linear-gradient(135deg, #141a0a 0%, #0a1428 100%); }
.lab-art-3  { background: linear-gradient(135deg, #0a0a1a 0%, #1a1428 100%); }
.lab-art-4  { background: linear-gradient(135deg, #1a0a14 0%, #0a1a1a 100%); }
.lab-art-5  { background: linear-gradient(135deg, #1a140a 0%, #0a0a1a 100%); }
.lab-art-6  { background: linear-gradient(135deg, #0a1a10 0%, #1a0a0a 100%); }
.lab-art-7  { background: linear-gradient(135deg, #0a1428 0%, #0a1a10 100%); }
.lab-art-8  { background: linear-gradient(135deg, #141428 0%, #1a140a 100%); }
.lab-art-9  { background: linear-gradient(135deg, #1a0a14 0%, #141428 100%); }
.lab-art-10 { background: linear-gradient(135deg, #0a1a14 0%, #1a0a28 100%); }

/* Grid overlay */
.lab-article-img::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(245,200,66,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245,200,66,0.03) 1px, transparent 1px);
  background-size: 28px 28px;
}

/* Gradient fade bottom */
.lab-article-img::after {
  content: '';
  position: absolute; bottom: 0; left: 0; right: 0;
  height: 50px;
  background: linear-gradient(to top, var(--bg-card), transparent);
  z-index: 2;
  pointer-events: none;
}

/* Placeholder icon */
.lab-article-placeholder {
  position: relative; z-index: 1;
  font-size: 2.4rem;
  filter: drop-shadow(0 0 16px rgba(245,200,66,0.2));
}

/* Real image when uploaded */
.lab-article-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform 0.5s var(--ease);
}
.lab-article-card:hover .lab-article-img img { transform: scale(1.04); }

/* Category badge */
.lab-article-cat {
  position: absolute;
  top: 0.7rem; left: 0.7rem;
  z-index: 3;
  font-family: var(--font-btn);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  background: rgba(245,200,66,0.1);
  border: 1px solid rgba(245,200,66,0.25);
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
}

/* Card body */
.lab-article-body {
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}
.lab-article-title {
  font-family: var(--font-title);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.35;
}
.lab-article-desc {
  font-family: var(--font-body);
  font-size: 0.83rem;
  color: var(--white-dim);
  line-height: 1.65;
  flex: 1;
}
.lab-article-read {
  font-family: var(--font-btn);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--gold);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
  align-self: flex-start;
  margin-top: 0.3rem;
}
.lab-article-read:hover { border-color: var(--gold); }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .lab-articles-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .lab-essays-inner { padding: 3rem 1.2rem 1.5rem; }
  .lab-articles-section { padding: 3.5rem 1.2rem 4rem; }
  .lab-articles-grid { grid-template-columns: 1fr; gap: 1rem; }
}
@media (max-width: 480px) {
  .lab-essays-inner { padding: 2.5rem 1rem 1rem; }
  .lab-articles-section { padding: 3rem 1rem 3rem; }
}