:root {
  --primary-color: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary-color: #10b981;
  --secondary-dark: #059669;
  --accent-color: #8b5cf6;
  --accent-dark: #7c3aed;
  --text-color: #1f2937;
  --text-light: #4b5563;
  --text-lighter: #9ca3af;
  --bg-color: #ffffff;
  --bg-light: #f9fafb;
  --bg-dark: #f3f4f6;
  --border-color: #e5e7eb;
  --success-color: #10b981;
  --error-color: #ef4444;
  --warning-color: #f59e0b;
  --info-color: #3b82f6;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --transition: all 0.3s ease;
  --border-radius: 0.375rem;
  --border-radius-lg: 0.5rem;
  --border-radius-xl: 0.75rem;
  --border-radius-2xl: 1rem;
  --border-radius-full: 9999px;
  --font-sans: "Poppins", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Roboto Mono", SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.dark-mode {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --secondary-color: #10b981;
  --secondary-dark: #059669;
  --accent-color: #8b5cf6;
  --accent-dark: #7c3aed;
  --text-color: #ffffff; /* Brighter white for better visibility */
  --text-light: #e5e7eb;
  --text-lighter: #d1d5db; /* Lighter color for better contrast */
  --bg-color: #111827;
  --bg-light: #1f2937;
  --bg-dark: #0f172a;
  --border-color: #374151;
  /* Rest of the dark mode variables remain the same */
}
.dark-mode {
  --primary-color: #3b82f6;
  --primary-dark: #2563eb;
  --secondary-color: #10b981;
  --secondary-dark: #059669;
  --accent-color: #8b5cf6;
  --accent-dark: #7c3aed;
  --text-color: #f9fafb;
  --text-light: #e5e7eb;
  --text-lighter: #9ca3af;
  --bg-color: #111827;
  --bg-light: #1f2937;
  --bg-dark: #0f172a;
  --border-color: #374151;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.25);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.26);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.26);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.25);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.24);
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--text-color);
  background-color: var(--bg-color);
  line-height: 1.6;
  overflow-x: hidden;
  transition: var(--transition);
}

a {
  text-decoration: none;
  color: var(--primary-color);
  transition: var(--transition);
}

a:hover {
  color: var(--primary-dark);
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  outline: none;
}

.primary-btn {
  background-color: var(--primary-color);
  color: white;
}

.primary-btn:hover {
  background-color: var(--primary-dark);
  color: white;
}

.secondary-btn {
  background-color: transparent;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}

.secondary-btn:hover {
  background-color: var(--primary-color);
  color: white;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.underline {
  height: 4px;
  width: 70px;
  background: var(--primary-color);
  margin: 0 auto;
  position: relative;
}

.underline::before {
  content: "";
  position: absolute;
  height: 4px;
  width: 35px;
  background: var(--secondary-color);
  top: 0;
  left: -40px;
}

.underline::after {
  content: "";
  position: absolute;
  height: 4px;
  width: 35px;
  background: var(--accent-color);
  top: 0;
  right: -40px;
}

/* Preloader */
.preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-color);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader {
  display: flex;
  align-items: center;
}

.loader .circle {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  margin: 0 8px;
  animation: bounce 1.5s infinite ease-in-out;
}

.loader .circle:nth-child(1) {
  background-color: var(--primary-color);
  animation-delay: 0s;
}

.loader .circle:nth-child(2) {
  background-color: var(--secondary-color);
  animation-delay: 0.2s;
}

.loader .circle:nth-child(3) {
  background-color: var(--accent-color);
  animation-delay: 0.4s;
}

@keyframes bounce {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: transparent;
  transition: var(--transition);
  padding: 1rem 0;
}

header.scrolled {
  background-color: var(--bg-color);
  box-shadow: var(--shadow);
  padding: 0.75rem 0;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary-color);
  position: relative;
  padding: 0.5rem 1rem;
  border: 2px solid var(--primary-color);
  border-radius: var(--border-radius);
}

nav {
  display: flex;
  align-items: center;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  color: var(--text-color);
  font-weight: 500;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.theme-toggle {
  position: relative;
  width: 60px;
  height: 30px;
  background-color: var(--bg-light);
  border-radius: 30px;
  margin-left: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 5px;
}

.theme-toggle i {
  font-size: 1rem;
  color: var(--text-color);
  z-index: 1;
}

.theme-toggle .fa-moon {
  color: #f1c40f;
}

.theme-toggle .fa-sun {
  color: #f39c12;
}

.toggle-ball {
  position: absolute;
  width: 24px;
  height: 24px;
  background-color: var(--primary-color);
  border-radius: 50%;
  left: 3px;
  transition: var(--transition);
}

.dark-mode .toggle-ball {
  left: 33px;
}

.hamburger {
  display: none;
  cursor: pointer;
}

.hamburger .line {
  width: 25px;
  height: 3px;
  background-color: var(--text-color);
  margin: 5px 0;
  transition: var(--transition);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 6rem 0 2rem;
  overflow: hidden;
}

.particles-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

.hero-text {
  z-index: 1;
}

.hero-text h1 {
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
  position: relative;
}

.glitch {
  position: relative;
  color: var(--text-color);
}

.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.8;
}

.glitch::before {
  color: var(--primary-color);
  animation: glitch-effect 35s infinite;
}

.glitch::after {
  color: var(--accent-color);
  animation: glitch-effect 15s infinite;
}

@keyframes glitch-effect {
  0% {
    transform: none;
    opacity: 0.8;
  }
  7% {
    transform: translate(2px, 3px);
    opacity: 0.6;
  }
  10% {
    transform: none;
    opacity: 0.8;
  }
  27% {
    transform: none;
    opacity: 0.8;
  }
  30% {
    transform: translate(-5px, -2px);
    opacity: 0.6;
  }
  35% {
    transform: none;
    opacity: 0.8;
  }
  52% {
    transform: none;
    opacity: 0.8;
  }
  55% {
    transform: translate(5px, -1px);
    opacity: 0.6;
  }
  50% {
    transform: none;
    opacity: 0.8;
  }
  72% {
    transform: none;
    opacity: 0.8;
  }
  75% {
    transform: translate(-2px, -6px);
    opacity: 0.6;
  }
  80% {
    transform: none;
    opacity: 0.8;
  }
  100% {
    transform: none;
    opacity: 0.8;
  }
}

.hero-text h2 {
  font-size: 1.5rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  color: var(--text-light);
}

.typing-text {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

#changing-text {
  color: var(--primary-color);
  font-weight: 600;
  position: relative;
}

#changing-text::after {
  content: "|";
  position: absolute;
  right: -8px;
  animation: blink 1s infinite;
}

@keyframes blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}

.hero-buttons {
  display: flex;
  gap: 1rem;
}

.hero-image {
  position: relative;
  z-index: 1;
}

.profile-container {
  position: relative;
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
}

.profile-circle {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
  animation: morph 8s ease-in-out infinite;
  z-index: -1;
  opacity: 0.8;
}

@keyframes morph {
  0% {
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  }
  25% {
    border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%;
  }
  50% {
    border-radius: 30% 70% 70% 30% / 70% 70% 30% 30%;
  }
  75% {
    border-radius: 70% 30% 30% 70% / 30% 30% 70% 70%;
  }
  100% {
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  }
}

.profile-img {
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  object-fit: cover;
  width: 100%;
  height: 100%;
  animation: morph 8s ease-in-out infinite;
  transition: var(--transition);
  filter: grayscale(0.2);
}

.trending-research {
  margin-top: 3rem;
  background-color: var(--bg-light);
  border-radius: var(--border-radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
}

.trending-research h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.live-indicator {
  background-color: var(--success-color);
  color: white;
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--border-radius-full);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
  100% {
    opacity: 1;
  }
}

.research-ticker {
  display: flex;
  overflow: hidden;
  position: relative;
}

.ticker-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
  padding: 0 1.5rem;
  animation: ticker 20s linear infinite;
}

.ticker-source {
  font-weight: 600;
  color: var(--primary-color);
  background-color: rgba(59, 130, 246, 0.1);
  padding: 0.25rem 0.5rem;
  border-radius: var(--border-radius);
}

@keyframes ticker {
  0% {
    transform: translateX(100%);
  }
  100% {
    transform: translateX(-100%);
  }
}
.current-time-container {
  margin-top: 1.5rem;
  text-align: center;
}

.current-time {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg-light);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  font-size: 0.875rem;
  color: var(--text-light);
}

.current-time i {
  color: var(--primary-color);
}
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  animation: bounce-light 2s infinite;
}
.scroll-indicator.hidden {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
.mouse {
  width: 30px;
  height: 50px;
  border: 2px solid var(--text-color);
  border-radius: 20px;
  position: relative;
}

.wheel {
  width: 6px;
  height: 6px;
  background-color: var(--text-color);
  border-radius: 50%;
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll 1.5s infinite;
}

@keyframes scroll {
  0% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }
}

.scroll-text {
  font-size: 0.875rem;
  color: var(--text-light);
}

@keyframes bounce-light {
  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(-10px);
  }
}

/* About Section */
.about {
  padding: 6rem 0;
  background-color: var(--bg-light);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-text p {
  margin-bottom: 1.5rem;
  color: var(--text-light);
}

.stats-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin: 2.5rem 0;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-light);
}

.about-buttons {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.skills-container {
  background-color: var(--bg-color);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
}

.skills-container h3 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.skill-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.skill-icon {
  font-size: 1.5rem;
  color: var(--primary-color);
}

.skill-name {
  font-weight: 500;
}

.skill-bar {
  height: 8px;
  background-color: var(--bg-light);
  border-radius: var(--border-radius-full);
  overflow: hidden;
}

.skill-level {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  border-radius: var(--border-radius-full);
}
// Update current date and time
  function updateDateTime() {
    const now = new Date()
    const options = {
      weekday: "long",
      year: "numeric",
      month: "long",
      day: "numeric",
      hour: "2-digit",
      minute: "2-digit",
      second: "2-digit",
    }
    const dateTimeString = now.toLocaleDateString("en-US", options)

    // Update the date/time display element
    const dateTimeElement = document.getElementById("current-date-time")
    if (dateTimeElement) {
      dateTimeElement.textContent = dateTimeString
    }
  }

  updateDateTime()
  setInterval(updateDateTime, 1000) // Update every second for a real-time clock

/* Research Section */
.research {
  padding: 6rem 0;
}

.category-tabs {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.tab-btn {
  padding: 0.75rem 1.5rem;
  background-color: var(--bg-light);
  border: none;
  border-radius: var(--border-radius);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn.active {
  background-color: var(--primary-color);
  color: white;
}

.category-panel {
  display: none;
}

.category-panel.active {
  display: block;
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 2rem;
}

.research-item {
  background-color: var(--bg-color);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
  height: 100%;
}

.research-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.research-icon {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.research-item h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.research-item p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* Publications Section */
/* Enhanced responsive styles for publications */
@media (max-width: 768px) {
  .publication-item {
    flex-direction: column;
    gap: 1rem;
  }
  
  .publication-year {
    min-width: auto;
    margin-bottom: 0.5rem;
  }
  
  .publication-item::before {
    width: 100%;
    height: 4px;
    top: 0;
    left: 0;
  }
  
  .conference-item {
    flex-direction: column;
    gap: 1rem;
  }
  
  .conference-date {
    min-width: auto;
    margin-bottom: 0.5rem;
  }
}

@media (max-width: 576px) {
  .publication-details h3 {
    font-size: 1.1rem;
  }
  
  .publication-abstract {
    font-size: 0.9rem;
  }
  
  .publication-links {
    flex-wrap: wrap;
  }
}
.publications {
  padding: 6rem 0;
  background-color: var(--bg-light);
}

.publication-item {
  display: flex;
  gap: 2rem;
  margin-bottom: 2.5rem;
  background-color: var(--bg-color);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.publication-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--primary-color), var(--accent-color));
}

.publication-year {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  min-width: 80px;
}

.publication-details {
  flex: 1;
}

.publication-details h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.publication-journal {
  font-style: italic;
  color: var(--text-light);
  margin-bottom: 0.5rem;
}

.publication-authors {
  font-weight: 500;
  margin-bottom: 1rem;
}

.publication-abstract {
  color: var(--text-light);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.publication-links {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.publication-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--primary-color);
}

.publication-status {
  background-color: var(--accent-color);
  color: white;
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--border-radius);
}

.citation-box {
  display: none;
  background-color: var(--bg-light);
  border-radius: var(--border-radius);
  padding: 1rem;
  margin-top: 1rem;
  position: relative;
}

.citation-box.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

.copy-citation {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: none;
  border: none;
  color: var(--primary-color);
  cursor: pointer;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.conference-presentations {
  margin-top: 3rem;
}

.conference-presentations h3 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  position: relative;
  padding-left: 1rem;
}

.conference-presentations h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 70%;
  background: linear-gradient(to bottom, var(--primary-color), var(--accent-color));
}

.conference-item {
  display: flex;
  gap: 2rem;
  margin-bottom: 1.5rem;
  background-color: var(--bg-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.conference-date {
  font-weight: 600;
  color: var(--primary-color);
  min-width: 100px;
}

.conference-details h4 {
  margin-bottom: 0.5rem;
}

.conference-details p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* Projects Section */
.projects {
  padding: 6rem 0;
}

.filter-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.filter-btn {
  padding: 0.5rem 1rem;
  background-color: var(--bg-light);
  border: none;
  border-radius: var(--border-radius);
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn.active {
  background-color: var(--primary-color);
  color: white;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.project-card {
  background-color: var(--bg-color);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  height: 100%;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.project-img {
  position: relative;
  overflow: hidden;
  height: 200px;
}

.project-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.project-card:hover .project-img img {
  transform: scale(1.05);
}

.project-links {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  opacity: 0;
  transition: var(--transition);
}

.project-card:hover .project-links {
  opacity: 1;
}

.project-link {
  width: 40px;
  height: 40px;
  background-color: white;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--text-color);
  transition: var(--transition);
}

.project-link:hover {
  background-color: var(--primary-color);
  color: white;
}

.project-info {
  padding: 1.5rem;
}

.project-info h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.project-info p {
  color: var(--text-light);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-tech span {
  background-color: var(--bg-light);
  padding: 0.25rem 0.5rem;
  border-radius: var(--border-radius);
  font-size: 0.75rem;
  color: var(--text-light);
}

.view-more-container {
  text-align: center;
  margin-top: 3rem;
}

/* Achievements Section */
.achievements {
  padding: 6rem 0;
  background-color: var(--bg-light);
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  left: 120px;
  width: 2px;
  height: 100%;
  background-color: var(--border-color);
}

.timeline-item {
  position: relative;
  padding-left: 150px;
  margin-bottom: 2.5rem;
}

.timeline-dot {
  position: absolute;
  left: 116px;
  top: 5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--primary-color);
  z-index: 1;
}

.timeline-date {
  position: absolute;
  left: 0;
  top: 0;
  width: 100px;
  text-align: right;
  font-weight: 600;
  color: var(--primary-color);
}

.timeline-content {
  background-color: var(--bg-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.timeline-content h3 {
  margin-bottom: 0.5rem;
}

.timeline-content p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* Researchers Section */
.researchers {
  padding: 6rem 0;
}

.researchers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.researcher-card {
  background-color: var(--bg-color);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  height: 100%;
}

.researcher-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.researcher-img {
  height: 200px;
  overflow: hidden;
}

.researcher-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.researcher-card:hover .researcher-img img {
  transform: scale(1.05);
}

.researcher-info {
  padding: 1.5rem;
}

.researcher-info h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.researcher-affiliation {
  color: var(--primary-color);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.researcher-field {
  font-style: italic;
  color: var(--text-light);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.researcher-contribution {
  color: var(--text-light);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.researcher-link {
  display: inline-block;
  color: var(--primary-color);
  font-size: 0.875rem;
  font-weight: 500;
}

.researchers-pagination {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 3rem;
}

.pagination-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition);
}

.pagination-btn.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.next-btn {
  width: auto;
  padding: 0 1rem;
  border-radius: var(--border-radius);
}

/* Blog Section */
.blog {
  padding: 6rem 0;
  background-color: var(--bg-light);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.blog-card {
  background-color: var(--bg-color);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  height: 100%;
}

.blog-card.featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.blog-img {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.blog-card.featured .blog-img {
  height: 100%;
}

.blog-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.blog-card:hover .blog-img img {
  transform: scale(1.05);
}

.blog-category {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background-color: var(--primary-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: var(--border-radius);
  font-size: 0.75rem;
  font-weight: 500;
}

.blog-content {
  padding: 1.5rem;
}

.blog-date {
  color: var(--text-light);
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
}

.blog-content h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  line-height: 1.4;
}

.blog-content p {
  color: var(--text-light);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

.read-more {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary-color);
  font-weight: 500;
  font-size: 0.875rem;
}

.read-more i {
  transition: var(--transition);
}

.read-more:hover i {
  transform: translateX(5px);
}

/* Tutorial cards styling */
.tutorial-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

.tutorial-card {
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.tutorial-card .blog-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.tutorial-card .read-more {
  margin-top: auto;
  color: var(--primary-color);
  font-weight: 600;
}

.tutorial-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.blog-category {
  background-color: var(--primary-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: var(--border-radius);
  font-size: 0.75rem;
  font-weight: 500;
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 1;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* Improved color contrast for light mode */
.light-mode {
  --text-light: #4b5563;
  --text-lighter: #6b7280;
  --primary-color: #4338ca;
  --primary-dark: #3730a3;
  --secondary-color: #059669;
  --secondary-dark: #047857;
  --accent-color: #7c3aed;
  --accent-dark: #6d28d9;
}

/* Responsive adjustments */
@media (max-width: 992px) {
  .tutorial-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .tutorial-cards {
    grid-template-columns: 1fr;
  }
}




/* Hidden blog cards (for "View More") */
.hidden-blog-card {
  display: none;
}

.hidden-blog-card.visible {
  display: block;
  animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Make sure blog cards are responsive */
@media (max-width: 768px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }
  
  .blog-card {
    max-width: 100%;
  }
  
  .blog-card.featured {
    grid-template-columns: 1fr;
  }
  
  .blog-img {
    height: 200px;
  }
}

/* Contact Section */
.contact {
  padding: 6rem 0;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background-color: var(--bg-light);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  transition: var(--transition);
}

.contact-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.contact-icon {
  width: 40px;
  height: 40px;
  background-color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  font-size: 1.25rem;
}

.contact-details h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.contact-details p {
  color: var(--text-light);
  font-size: 0.95rem;
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.social-link {
  width: 40px;
  height: 40px;
  background-color: var(--bg-light);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--text-color);
  transition: var(--transition);
}

.social-link:hover {
  background-color: var(--primary-color);
  color: white;
}

.contact-form-container {
  background-color: var(--bg-light);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  position: relative;
}

.contact-form {
  display: grid;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-sans);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.submit-btn {
  justify-self: start;
}

.form-success {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-light);
  border-radius: var(--border-radius-lg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.form-success.active {
  opacity: 1;
  visibility: visible;
}

.form-success i {
  font-size: 3rem;
  color: var(--success-color);
}

/* Footer */
.footer {
  background-color: var(--bg-light);
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-logo a {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
}

.footer-logo p {
  color: var(--text-light);
  margin-top: 0.5rem;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.footer-link-group h3 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
}

.footer-link-group h3::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 30px;
  height: 2px;
  background-color: var(--primary-color);
}

.footer-link-group ul {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link-group a {
  color: var(--text-light);
  transition: var(--transition);
}

.footer-link-group a:hover {
  color: var(--primary-color);
  transform: translateX(5px);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.footer-bottom p {
  color: var(--text-light);
  font-size: 0.875rem;
}

.theme-credits {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle-footer {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-color);
  font-size: 1.25rem;
}

.theme-credits p {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-credits i {
  color: var(--primary-color);
}

/* Scroll Top Button */
.scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background-color: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  box-shadow: var(--shadow-lg);
}

.scroll-top.active {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  background-color: var(--primary-dark);
  transform: translateY(-5px);
}

/* Media Queries */
@media (max-width: 1200px) {
  .hero-text h1 {
    font-size: 3.5rem;
  }

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

@media (max-width: 992px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-text {
    order: 2;
  }

  .hero-image {
    order: 1;
    margin-bottom: 2rem;
  }

  .hero-buttons {
    justify-content: center;
  }

  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .skills-container {
    max-width: 600px;
    margin: 0 auto;
  }

  .blog-card.featured {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-logo {
    text-align: center;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    left: -100%;
    width: 80%;
    height: 100vh;
    background-color: var(--bg-color);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: var(--transition);
    z-index: 1000;
    box-shadow: var(--shadow-xl);
  }

  .nav-links.active {
    left: 0;
  }

  .hamburger {
    display: block;
    z-index: 1001;
  }

  .hamburger.active .line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .hamburger.active .line:nth-child(2) {
    opacity: 0;
  }

  .hamburger.active .line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .theme-toggle {
    margin-right: 1rem;
  }

  .research-grid,
  .projects-grid,
  .researchers-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  }

  .footer-links {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-link-group {
    text-align: center;
  }

  .footer-link-group h3::after {
    left: 50%;
    transform: translateX(-50%);
  }

  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

@media (max-width: 576px) {
  .hero-text h1 {
    font-size: 2.5rem;
  }

  .section-header h2 {
    font-size: 2rem;
  }

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

  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    padding-left: 50px;
  }

  .timeline-dot {
    left: 16px;
  }

  .timeline-date {
    position: relative;
    left: 0;
    top: 0;
    width: auto;
    text-align: left;
    margin-bottom: 0.5rem;
  }
}