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

body {
  font-family: "Poppins", sans-serif;
  background: #0f0f23;
  color: #ffffff;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Animated background */
.bg-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, #0f0f23, #1a1a3a, #2d2d5f);
  background-size: 300% 300%;
  animation: gradientShift 15s ease infinite;
  z-index: -1;
}

@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* Navigation */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(10px);
  padding: 1rem 2rem;
  z-index: 1000;
  transition: all 0.3s ease;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #00d4ff;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  color: #ffffff;
  text-decoration: none;
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: #00d4ff;
}

/* Hero section */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
}

.hero-content h1 {
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #00d4ff, #ff0080);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: fadeInUp 1s ease;
}

.hero-content p {
  font-size: 1.3rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  animation: fadeInUp 1s ease 0.2s both;
}

.cta-button {
  display: inline-block;
  padding: 1rem 2rem;
  background: linear-gradient(135deg, #00d4ff, #0099cc);
  color: white;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  transition: all 0.3s ease;
  animation: fadeInUp 1s ease 0.4s both;
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Main content */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  margin: 6rem 0;
  opacity: 0;
  transform: translateY(50px);
  animation: fadeInUp 0.8s ease forwards;
}

.section:nth-child(1) {
  animation-delay: 0.2s;
}
.section:nth-child(2) {
  animation-delay: 0.4s;
}
.section:nth-child(3) {
  animation-delay: 0.6s;
}
.section:nth-child(4) {
  animation-delay: 0.8s;
}

.section h2 {
  font-size: 2.5rem;
  font-weight: 600;
  margin-bottom: 2rem;
  text-align: center;
  color: #00d4ff;
}

/* Project grid */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.project-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
}

.project-card:hover {
  transform: translateY(-10px);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.project-card h3 {
  color: #00d4ff;
  margin-bottom: 1rem;
  font-size: 1.3rem;
}

.project-card .icon {
  font-size: 2rem;
  color: #ff0080;
  margin-bottom: 1rem;
}

/* Gallery */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin: 3rem 0;
}

.gallery-item {
  position: relative;
  border-radius: 15px;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.3s ease;
}

.gallery-item:hover {
  transform: scale(1.05);
}

.gallery-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: all 0.3s ease;
}

.gallery-item:hover img {
  filter: brightness(1.2);
}

.gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  color: white;
  padding: 1rem;
  transform: translateY(100%);
  transition: all 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
  transform: translateY(0);
}

/* Lightbox Modal */
.lightbox {
  display: none;
  position: fixed;
  z-index: 10000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(10px);
  animation: fadeIn 0.3s ease;
}

.lightbox.active {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  animation: zoomIn 0.3s ease;
}

.lightbox-content img {
  width: 100%;
  height: auto;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 10px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
}

.lightbox-close {
  position: absolute;
  top: -40px;
  right: 0;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.1);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

.lightbox-info {
  position: absolute;
  bottom: -60px;
  left: 0;
  right: 0;
  color: white;
  text-align: center;
  background: rgba(0, 0, 0, 0.7);
  padding: 1rem;
  border-radius: 10px;
  backdrop-filter: blur(10px);
}

.lightbox-info h4 {
  color: #00d4ff;
  margin-bottom: 0.5rem;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: none;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-50%) scale(1.1);
}

.lightbox-prev {
  left: -80px;
}

.lightbox-next {
  right: -80px;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes zoomIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Resources */
.resources {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.resource-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 15px;
  text-decoration: none;
  color: white;
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.resource-link:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateX(10px);
}

.resource-icon {
  font-size: 2rem;
  color: #00d4ff;
}

/* References Section */
.references-container {
  display: grid;
  gap: 2rem;
  margin: 3rem 0;
}

.reference-item {
  display: flex;
  gap: 1.5rem;
  padding: 2rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 15px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
}

.reference-item:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.reference-icon {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #00d4ff, #0099cc);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
}

.reference-content h3 {
  color: #00d4ff;
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
  font-weight: 600;
}

.reference-authors {
  color: #ff0080;
  font-weight: 500;
  margin-bottom: 0.3rem;
  font-size: 0.95rem;
}

.reference-journal {
  color: rgba(255, 255, 255, 0.8);
  font-style: italic;
  margin-bottom: 0.8rem;
  font-size: 0.9rem;
}

.reference-description {
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.6;
  font-size: 0.95rem;
}

/* Footer */
footer {
  background: rgba(0, 0, 0, 0.8);
  text-align: center;
  padding: 3rem 2rem;
  margin-top: 6rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Mobile responsiveness */
@media (max-width: 768px) {
  .hero-content h1 {
    font-size: 2.5rem;
  }

  .nav-links {
    display: none;
  }

  .project-grid {
    grid-template-columns: 1fr;
  }

  .gallery {
    grid-template-columns: repeat(2, 1fr);
  }

  .section {
    margin: 3rem 0;
  }
  
  .lightbox-nav {
    display: none;
  }
  
  .lightbox-info {
    position: relative;
    bottom: 0;
    margin-top: 1rem;
  }
  
  .lightbox-close {
    top: -50px;
    right: 10px;
  }
}