/* Page Header - Consistent across pages */
.page-header {
  padding: 8rem 2rem 4rem;
  text-align: center;
  background: var(--surface-color);
  margin-top: 0; /* Overlap with nav */
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  position: relative;
}

.page-header h1 {
  font-size: 3rem;
  background: var(--header-bg);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

/* Research Container & Content Layout */
.research-container {
  max-width: 1200px;
  margin: 4rem auto;
  padding: 0 2rem;
  counter-reset: subsection;
  display: grid;
  gap: 4rem; /* Spacing between sections */
}

/* Introduction Section (Description + Main Image) 
   We will target these specifically in HTML if needed, but here we style generically 
*/
.research-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  background: var(--surface-color);
  padding: 3rem;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.research-description {
  background: transparent;
  padding: 0;
  border-radius: 0;
  box-shadow: none;
  border-left: none;
  position: relative;
}

.research-description p {
  text-align: left;
  font-size: 1.15rem;
  color: var(--secondary-text-color);
  line-height: 1.8;
}

.research-image {
  width: 100%;
  margin: 0;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

.research-image:hover {
  transform: scale(1.02);
}

.research-image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 0; /* Handled by container */
  box-shadow: none;
}

/* Image grid if multiple images */
.research-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

/* Subsections - Cards with nice depth */
.research-subsection {
  background: var(--surface-color);
  padding: 3rem;
  border-radius: 12px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.03);
  position: relative;
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  overflow: hidden;
}

.research-subsection:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
  border-top: 3px solid var(--accent-color);
}

.research-subsection::before {
  /* Colorful accent line or dot */
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-color), var(--accent-color-dark));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.research-subsection:hover::before {
  opacity: 1;
}

.research-subsection h2 {
  font-size: 1.8rem;
  color: var(--primary-text-color);
  margin-bottom: 1.5rem;
  font-weight: 700;
  position: relative;
  display: inline-block;
}

/* Underline effect for H2 */
.research-subsection h2::after {
  content: "";
  display: block;
  width: 40px;
  height: 3px;
  background: var(--accent-color);
  margin-top: 0.5rem;
  border-radius: 2px;
}

.research-subsection p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--secondary-text-color);
  margin-bottom: 2rem;
}

/* References styling */
.reference {
  font-size: 0.9rem;
  color: var(--secondary-text-color);
  padding: 1.5rem;
  background: #f8f9fa;
  border-radius: 8px;
  border-left: 4px solid var(--accent-color);
  opacity: 0.9;
  font-style: italic;
}

.reference a {
  color: var(--accent-color);
  font-weight: 600;
  text-decoration: none;
  transition: color 0.2s;
}

.reference a:hover {
  text-decoration: underline;
  color: var(--accent-color-dark);
}

/* Responsive */
@media (max-width: 900px) {
  .research-intro {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .research-description p {
    text-align: center;
  }
}
  transition: color 0.3s;
  word-break: break-all;
}

.reference a:hover {
  color: var(--primary-text-color);
}

/* Responsive */
@media (max-width: 768px) {
  .page-header h1 {
    font-size: 1.8rem;
  }

  .research-description,
  .research-subsection {
    padding: 1.5rem;
  }

  .research-subsection:nth-child(even) {
    padding: 1.5rem;
  }

  .research-images-row {
    flex-direction: column;
    gap: 1rem;
  }

  .research-images-row .research-image img {
    max-width: 100%;
  }

  .research-subsection::before {
    font-size: 1.8rem;
    top: 1rem;
    right: 1rem;
  }
}