/* Reset and global styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: #222;
  background-color: #f7f9fc;
  display: flex;
}

a {
  text-decoration: none;
  color: #0066cc;
  transition: color 0.3s ease;
}
a:hover {
  color: #003366;
}

ul {
  list-style: none;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background: linear-gradient(to bottom, #0f2027, #203a43, #2c5364);
  color: #fff;
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  padding: 2rem 1rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  z-index: 1000;
  transition: transform 0.3s ease-in-out;
  box-shadow: 4px 0 12px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(4px);
}

.sidebar .logo {
  font-size: 2rem;
  font-weight: bold;
  margin-bottom: 2rem;
  line-height: 1.2;
  color: #00d1b2;
  animation: fadeIn 1.5s ease;
}

.nav-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  animation: fadeInUp 1s ease-in-out;
}

.nav-links a {
  color: #ddd;
  font-size: 1rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  position: relative;
}

.nav-links a:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: #00d1b2;
  transform: translateX(5px);
}

.sidebar.collapsed {
  transform: translateX(-100%);
}

/* Toggle button */
.toggle-button {
  position: fixed;
  bottom: 1rem;
  left: 1rem;
  z-index: 1100;
}

.toggle-button button {
  background: #00d1b2;
  border: none;
  color: white;
  padding: 0.5rem 0.8rem;
  font-size: 1.2rem;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 5px rgba(0,0,0,0.3);
  transition: transform 0.3s ease, background 0.3s ease;
}

.toggle-button button:hover {
  background: #009e94;
  transform: scale(1.1);
}

/* Main content */
.main-content {
  margin-left: 260px;
  padding: 2rem;
  width: calc(100% - 260px);
  transition: margin-left 0.3s ease, width 0.3s ease;
}

.main-content.expanded {
  margin-left: 0;
  width: 100%;
}

/* Hero */
.hero {
  padding: 4rem 0 2rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}
.hero span {
  color: #00d1b2;
}

.typewriter {
  font-family: monospace;
  font-size: 1.2rem;
  color: #333;
  white-space: nowrap;
  overflow: hidden;
  border-right: 2px solid #00d1b2;
  width: 0;
  animation: typing 3s steps(40, end) forwards, blink 0.8s infinite;
}

@keyframes typing {
  from { width: 0 }
  to { width: 100% }
}

@keyframes blink {
  50% { border-color: transparent }
}

/* Section Styling */
.section {
  margin-bottom: 3rem;
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid #00d1b2;
  padding-bottom: 0.5rem;
}

/* Profile Image */
.profile-container {
  display: flex;
  justify-content: center;
  margin-bottom: 2rem;
  animation: fadeInUp 1.2s ease-out, float 5s ease-in-out infinite;
}

.profile-border {
  border: 6px solid #00d1b2;
  border-radius: 50%;
  padding: 8px;
  animation: pulseGlow 3s infinite ease-in-out;
  box-shadow: 0 0 20px rgba(0, 209, 178, 0.5);
  transition: transform 0.4s ease;
}

.profile-pic {
  border-radius: 50%;
  width: 300px;
  height: 300px;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.profile-border:hover {
  transform: scale(1.05);
  box-shadow: 0 0 30px rgba(0, 209, 178, 0.8);
}

.profile-pic:hover {
  transform: scale(1.08);
}

/* Read more */
.read-more {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  background-color: #00d1b2;
  color: white;
  border-radius: 5px;
  font-weight: bold;
}
.read-more:hover {
  background-color: #009e94;
}

/* Cards */
.research-cards, .news-cards, .extra-curricular-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.research-card, .news-card, .activity-card {
  background-color: #fff;
  border: 1px solid #ddd;
  border-radius: 10px;
  padding: 1rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  transition: transform 0.3s ease;
}
.research-card:hover, .news-card:hover, .activity-card:hover {
  transform: translateY(-5px);
}

.research-card img, .news-card img {
  width: 100%;
  border-radius: 8px;
  margin-bottom: 0.8rem;
}

/* Contact */
.contact-section .contact-inline {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  font-size: 1.8rem;
  margin-top: 1rem;
}
.contact-icon {
  color: #00d1b2;
}
.contact-icon:hover {
  color: #00766f;
}

/* Footer */
footer {
  margin-top: 3rem;
  text-align: center;
  font-size: 0.9rem;
  color: #777;
}

/* Responsive */
@media screen and (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    position: fixed;
  }

  .sidebar.show {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
    width: 100%;
  }

  .typewriter {
    font-size: 1rem;
  }
}

/* Animations */
@keyframes pulseGlow {
  0% { box-shadow: 0 0 15px rgba(0, 209, 178, 0.4); }
  50% { box-shadow: 0 0 30px rgba(0, 209, 178, 0.8); }
  100% { box-shadow: 0 0 15px rgba(0, 209, 178, 0.4); }
}

@keyframes fadeInUp {
  0% { opacity: 0; transform: translateY(30px); }
  100% { opacity: 1; transform: translateY(0); }
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}