/* Advanced Research Features Section */
.advanced-features {
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--card-bg) 0%, var(--secondary-bg) 100%);
  transition: background 0.3s ease;
}

.advanced-features::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.02) 0%, rgba(255, 255, 255, 0.01) 20%, transparent 100%);
  pointer-events: none;
}

.research-features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
  margin-top: 3rem;
}

.research-feature-card {
  background-color: var(--card-bg);
  border-radius: 1.25rem;
  padding: 2.5rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  height: 100%;
  display: flex;
  flex-direction: column;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  will-change: transform, opacity;
  transform-style: preserve-3d;
}

.research-feature-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.research-feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.05) 100%);
  z-index: 0;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.research-feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.research-feature-card:hover::before {
  opacity: 1;
}

.research-feature-icon {
  width: 70px;
  height: 70px;
  border-radius: 18px;
  background: var(--accent-color);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  transition: all 0.3s ease;
  position: relative;
  z-index: 1;
}

.research-feature-icon i {
  font-size: 2rem;
  color: #000;
  transition: all 0.3s ease;
}

.research-feature-card:hover .research-feature-icon {
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 8px 25px rgba(255, 214, 0, 0.25);
}

.research-feature-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
  position: relative;
  z-index: 1;
}

.research-feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
}

.research-feature-list {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem 0;
  position: relative;
  z-index: 1;
  flex-grow: 1;
}

.research-feature-list li {
  display: flex;
  align-items: center;
  margin-bottom: 0.75rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: transform 0.2s ease;
}

.research-feature-list li:hover {
  transform: translateX(5px);
}

.research-feature-list li i {
  color: var(--accent-color);
  margin-right: 0.75rem;
  font-size: 1rem;
}

.research-feature-btn {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 0.8rem 1.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.research-feature-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background-color: var(--accent-color);
  transition: width 0.3s ease;
  z-index: -1;
}

.research-feature-btn span {
  transition: transform 0.3s ease;
}

.research-feature-btn i {
  transform: translateX(0);
  opacity: 0.7;
  transition: all 0.3s ease;
}

.research-feature-btn:hover {
  color: #000;
  border-color: var(--accent-color);
}

.research-feature-btn:hover::before {
  width: 100%;
}

.research-feature-btn:hover span {
  transform: translateX(-8px);
}

.research-feature-btn:hover i {
  transform: translateX(5px);
  opacity: 1;
}

.research-feature-btn.clicked {
  animation: button-pulse 0.3s ease;
}

@keyframes button-pulse {
  0% { transform: scale(1); }
  50% { transform: scale(0.95); }
  100% { transform: scale(1); }
}

.pulse-animation {
  animation: input-pulse 1s ease;
}

@keyframes input-pulse {
  0% { box-shadow: 0 0 0 0 rgba(255, 214, 0, 0.7); }
  70% { box-shadow: 0 0 0 10px rgba(255, 214, 0, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 214, 0, 0); }
}

/* Advanced Research Features - Dark Theme */
[data-theme="dark"] .advanced-features {
  background: linear-gradient(135deg, #1a1f2c 0%, #121720 100%);
}

[data-theme="dark"] .research-feature-card {
  background-color: rgba(30, 35, 45, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .research-feature-icon {
  background-color: var(--accent-color);
}

[data-theme="dark"] .research-feature-icon i {
  color: #000;
}

[data-theme="dark"] .research-feature-card:hover .research-feature-icon {
  box-shadow: 0 8px 25px rgba(255, 214, 0, 0.15);
}

[data-theme="dark"] .research-feature-btn {
  border: 1px solid rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .research-feature-btn:hover {
  color: #000;
}

/* Advanced Research Features - Responsive */
@media (max-width: 992px) {
  .advanced-features {
    padding: 4rem 0;
  }
  
  .research-features-grid {
    gap: 2rem;
  }
  
  .research-feature-card {
    padding: 2rem;
  }
}

@media (max-width: 768px) {
  .advanced-features {
    padding: 3rem 0;
  }
  
  .research-features-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
  }
  
  .research-feature-icon {
    width: 60px;
    height: 60px;
    border-radius: 15px;
    margin-bottom: 1.25rem;
  }
  
  .research-feature-icon i {
    font-size: 1.75rem;
  }
  
  .research-feature-card h3 {
    font-size: 1.35rem;
  }
}

@media (max-width: 480px) {
  .advanced-features {
    padding: 2.5rem 0;
  }
  
  .research-features-grid {
    grid-template-columns: 1fr;
  }
  
  .research-feature-card {
    padding: 1.75rem;
  }
  
  .research-feature-card:hover {
    transform: translateY(-5px);
  }
  
  .research-feature-list li {
    font-size: 0.9rem;
  }
  
  .research-feature-btn {
    padding: 0.7rem 1.25rem;
  }
}