* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Poppins', sans-serif;
  color: #333;
  background-color: #fdfdfd;
  position: relative;
  overflow-x: hidden;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

html {
  scroll-behavior: smooth;
}

 
.background-pattern {
  opacity: 0.05;
  position: fixed;
  inset: 0;
  z-index: -1;
}

 
.research-header {
  margin-top: 60px;
  text-align: center;
  padding: 80px 20px;
  background: linear-gradient(135deg, #e8f1ff, #ffffff);
}

.research-header h1 {
  font-size: 2.5rem;
  color: #083b8a;
}

.research-header .divider {
  width: 80px;
  height: 4px;
  background: #083b8a;
  margin: 15px auto;
  border-radius: 2px;
}

.research-header p {
  color: #555;
  max-width: 600px;
  margin: 0 auto;
}

 
.research-areas .grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
}

.research-areas {
  background: #f8f9fc;
  padding: 80px 0;
  text-align: center;
  font-family: 'Poppins', sans-serif;
}

.research-areas h2 {
  font-size: 2.5rem;
  margin-bottom: 50px;
  color: #111;
  letter-spacing: 1px;
}

 

.card {
  background: white;
  border-radius: 16px;
  padding: 40px 25px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

.icon {
  font-size: 45px;
  color: #2e73ff;
  margin-bottom: 20px;
  transition: color 0.3s ease, transform 0.3s ease;
}

.card:hover .icon {
  color: #004aad;
  transform: scale(1.1);
}

.card h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
  color: #222;
}

.card p {
  font-size: 1rem;
  color: #555;
}

.card {
  background: #fff;
  padding: 30px;
  border-radius: 12px;
  transition: 0.3s;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.card .icon {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

 
.tabs-section {
  background: linear-gradient(135deg, #e8f1ff, #ffffff);
  padding: 80px 0;
}

.tabs {
  display: flex;
  justify-content: center;
  margin-bottom: 40px;
}

.tab-button {
  padding: 10px 25px;
  border: none;
  background: #ddd;
  color: #333;
  cursor: pointer;
  font-weight: 600;
  transition: 0.3s;
}

.tab-button.active {
  background: #083b8a;
  color: white;
}

.tab-button:hover {
  background: #0b4eb8;
  color: white;
}

 

.tab-content {
  display: none;
  animation: fadeIn 0.4s ease;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

 
.publication-card {
  background: white;
  border-radius: 1rem;
  padding: 2rem;
  margin-bottom: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
  border-left: 4px solid #083b8a;
  border: 1px solid #e5e7eb;
  border-left: 4px solid #083b8a;
}

.publication-card:hover {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
  transform: translateY(-4px);
}

.pub-info {
  flex: 1;
}

.pub-info h3 {
  color: #111827;
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
  line-height: 1.5;
}

.authors,
.venue {
  color: #666;
}

.badge {
  display: inline-block;
  padding: 0.4rem 0.85rem;
  border-radius: 0.5rem;
  font-size: 0.8rem;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.badge.blue {
  background: linear-gradient(135deg, #e0ecff, #f0f7ff);
  color: #083b8a;
  border: 1px solid #d0e0f5;
}

.badge.green {
  background: linear-gradient(135deg, #e0f8e9, #ecfde6);
  color: #0b8a3b;
  border: 1px solid #c1f1d5;
}

.badge.amber {
  background: linear-gradient(135deg, #fff6db, #fffbeb);
  color: #92400e;
  border: 1px solid #fde68a;
}

 
.btn-secondary.disabled {
  padding: 10px 20px;
  background: rgba(120, 120, 120, 0.12);
  color: #555;
  border: 1px solid rgba(120, 120, 120, 0.3);
  border-radius: 30px;
  font-size: 14px;
  font-weight: 600;
  cursor: not-allowed;
  backdrop-filter: blur(4px);
  transition: all 0.3s ease;
}

.btn-secondary.disabled:hover {
  background: rgba(120, 120, 120, 0.18);
  box-shadow: 0 0 10px rgba(150, 150, 150, 0.3);
}

.btn-primary,
.btn-outline {
  text-decoration: none;
  padding: 8px 15px;
  border-radius: 6px;
  transition: 0.3s;
  display: inline-block;
  margin-top: 10px;
}

.btn-primary {
  background: #083b8a;
  color: white;
}

.btn-primary:hover {
  background: #0b4eb8;
}

.btn-outline {
  border: 2px solid #083b8a;
  color: #083b8a;
}

.btn-outline:hover {
  background: #e8f1ff;
}

 
.project-card {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  padding: 25px;
  background: white;
  border-radius: 10px;
  border-left: 5px solid #083b8a;
  margin-bottom: 20px;
  transition: 0.3s;
}

.project-card:hover {
  transform: translateY(-6px);
}

.icon-box {
  background: #e0ecff;
  color: #083b8a;
  padding: 15px;
  border-radius: 10px;
  font-size: 1.5rem;
}

.project-header {
  display: flex;
  align-items: center;
  gap: 10px;
}

.meta span {
  margin-right: 20px;
  color: #555;
}

 
.cta {
  padding: 80px 0;
  text-align: center;
}

.cta-card {
  background: linear-gradient(to right, #083b8a, #0b4eb8);
  color: white;
  padding: 60px 30px;
  border-radius: 14px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.cta-card h2 {
  margin-bottom: 15px;
}

.cta-card p {
  color: #d9e6ff;
  margin-bottom: 30px;
}

.cta-button {
  background: white;
  color: #083b8a;
  text-decoration: none;
  padding: 12px 30px;
  border-radius: 8px;
  font-weight: 600;
  transition: 0.3s;
}

.cta-button:hover {
  background: #f4f8ff;
}