/* ============================================================
   RESEARCH PAGE CSS
   ============================================================ */

.page-hero {
  padding: calc(var(--nav-height) + 60px) clamp(20px, 5vw, 60px) 80px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.page-hero-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ai-blue);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: fadeUp 0.6s ease both;
}

.page-hero-label::before {
  content: '';
  width: 20px; height: 1.5px;
  background: var(--ai-blue);
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.05;
  animation: fadeUp 0.6s 0.1s ease both;
}

.page-hero p {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: var(--gray-500);
  max-width: 600px;
  line-height: 1.75;
  margin-top: 20px;
  animation: fadeUp 0.6s 0.2s ease both;
}

/* ── Research Stats Bar ───────────────────────────────────── */
.research-stats-bar {
  display: flex;
  gap: 1px;
  background: var(--gray-100);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 48px;
  animation: fadeUp 0.6s 0.3s ease both;
}

.research-stat {
  background: var(--white);
  padding: 24px 32px;
  flex: 1;
  text-align: center;
}

.research-stat-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: var(--gradient-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
}

.research-stat-label {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-top: 4px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

@media (max-width: 600px) {
  .research-stats-bar { flex-direction: column; }
}

/* ── Research Areas ───────────────────────────────────────── */
.research-areas {
  padding: var(--section-pad) clamp(20px, 5vw, 60px);
  background: var(--gray-50);
}

.research-areas-inner { max-width: var(--max-width); margin: 0 auto; }

.area-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.area-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-xl);
  padding: 32px;
  transition: all var(--transition-normal);
}

.area-card:hover {
  border-color: var(--ai-blue);
  box-shadow: var(--shadow-blue);
  transform: translateY(-4px);
}

.area-icon {
  font-size: 2rem;
  margin-bottom: 20px;
  display: block;
}

.area-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.area-card p {
  font-size: 0.9rem;
  color: var(--gray-500);
  line-height: 1.7;
}

.area-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 20px;
}

@media (max-width: 900px) {
  .area-cards { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .area-cards { grid-template-columns: 1fr; }
}

/* ── Publications ─────────────────────────────────────────── */
.publications {
  padding: var(--section-pad) clamp(20px, 5vw, 60px);
}

.publications-inner { max-width: var(--max-width); margin: 0 auto; }

.pub-list {
  margin-top: 48px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.pub-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  display: flex;
  align-items: flex-start;
  gap: 24px;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.pub-card:hover {
  border-color: rgba(79,126,255,0.3);
  box-shadow: var(--shadow-blue);
  transform: translateX(4px);
}

.pub-year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ai-blue);
  font-weight: 500;
  min-width: 48px;
  padding-top: 4px;
}

.pub-content { flex: 1; }

.pub-content h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
  line-height: 1.4;
}

.pub-meta {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-bottom: 12px;
}

.pub-abstract {
  font-size: 0.875rem;
  color: var(--gray-700);
  line-height: 1.65;
}

.pub-badge {
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.pub-badge.conf {
  background: rgba(79,126,255,0.1);
  color: var(--ai-blue);
}

.pub-badge.journal {
  background: rgba(122,95,255,0.1);
  color: var(--ai-purple);
}

.pub-badge.preprint {
  background: rgba(0,212,255,0.1);
  color: #0099BB;
}

/* ── Experiments ──────────────────────────────────────────── */
.experiments {
  padding: var(--section-pad) clamp(20px, 5vw, 60px);
  background: var(--gray-50);
}

.experiments-inner { max-width: var(--max-width); margin: 0 auto; }

.exp-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.exp-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-xl);
  padding: 32px;
  transition: all var(--transition-normal);
}

.exp-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
}

.exp-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.exp-icon.blue { background: rgba(79,126,255,0.1); }
.exp-icon.purple { background: rgba(122,95,255,0.1); }
.exp-icon.cyan { background: rgba(0,212,255,0.1); }
.exp-icon.pink { background: rgba(255,107,157,0.1); }

.exp-status {
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-family: var(--font-mono);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.exp-status.active {
  background: rgba(0,200,100,0.1);
  color: #008855;
}

.exp-status.completed {
  background: rgba(79,126,255,0.1);
  color: var(--ai-blue);
}

.exp-status.ongoing {
  background: rgba(255,180,0,0.1);
  color: #CC8800;
}

.exp-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.exp-card p {
  font-size: 0.875rem;
  color: var(--gray-500);
  line-height: 1.65;
}

.exp-metrics {
  display: flex;
  gap: 20px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--gray-100);
}

.exp-metric-val {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.3rem;
  background: var(--gradient-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
}

.exp-metric-label {
  font-size: 0.75rem;
  color: var(--gray-500);
}

@media (max-width: 768px) {
  .exp-grid { grid-template-columns: 1fr; }
}