/* ============================================================
   RESEARCH SECTION
   ============================================================ */
#research { background: transparent; }

.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 1rem;
}

.research-card {
  position: relative;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-left: 3px solid transparent;
  border-radius: 16px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
  display: flex;
  flex-direction: column;
}

.research-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: radial-gradient(var(--border-color) 1px, transparent 1px);
  background-size: 20px 20px;
  opacity: 0.3;
  pointer-events: none;
  z-index: 0;
}

/* Subtle scanning line animation for high-tech feel */
.research-card::after {
  content: '';
  position: absolute;
  top: -50%; left: 0; right: 0; height: 100px;
  background: linear-gradient(to bottom, transparent, rgba(212, 175, 55, 0.05) 50%, transparent);
  pointer-events: none;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.3s;
}

.research-card:hover::after {
  opacity: 1;
  animation: scanline 3s linear infinite;
}

@keyframes scanline {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(500%); }
}

.research-card-glow {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  background: radial-gradient(circle at 50% 0%, var(--accent-primary) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 0;
  pointer-events: none;
}

.research-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  border-left-color: var(--accent-primary);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.research-card:hover .research-card-glow {
  opacity: 0.1;
}

.research-card-content {
  position: relative;
  z-index: 2;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.research-meta {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: flex-start;
  margin-bottom: 1.25rem;
  gap: 0.75rem;
}

.research-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--accent-primary);
  opacity: 0.9;
  letter-spacing: 0.05em;
  background: rgba(212, 175, 55, 0.1);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
}

.research-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.research-tags .tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.3rem 0.6rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-secondary);
  transition: all 0.3s ease;
}

.research-card:hover .research-tags .tag {
  border-color: rgba(212, 175, 55, 0.3);
  color: var(--text-primary);
}

.research-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 1rem;
  line-height: 1.4;
  transition: all 0.3s ease;
}

.research-card:hover .research-title {
  color: #fff;
  text-shadow: 0 0 10px rgba(212, 175, 55, 0.5);
}

.research-abstract {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2rem;
  flex: 1;
  text-align: justify;
}

.research-actions {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin-top: auto;
  border-top: 1px dashed var(--border-color);
  padding-top: 1.25rem;
}

.research-actions .btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.research-card:hover .btn-icon {
  transform: translateX(6px);
  color: var(--accent-primary);
}

.research-status {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background: rgba(212, 175, 55, 0.08);
  border: 1px solid rgba(212, 175, 55, 0.3);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

/* ── RESPONSIVE ───────────────────────────────────────────── */
@media (max-width: 768px) {
  .research-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .research-card-content {
    padding: 1.5rem;
  }

  .research-title {
    font-size: 1.1rem;
  }

  .research-abstract {
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
  }

  .research-meta {
    gap: 0.5rem;
  }

  .research-tags .tag {
    font-size: 0.6rem;
  }
}

@media (max-width: 480px) {
  .research-card-content {
    padding: 1.25rem;
  }

  .research-card {
    border-radius: 12px;
  }

  .research-title {
    font-size: 1rem;
    margin-bottom: 0.75rem;
  }

  .research-abstract {
    font-size: 0.82rem;
    line-height: 1.6;
    margin-bottom: 1.25rem;
  }

  .research-date {
    font-size: 0.7rem;
  }

  .research-actions {
    padding-top: 1rem;
  }

  .research-status {
    font-size: 0.6rem;
  }
}