/* CSS Variables for easy customization */
:root {
    --primary-color: #0ff;
    --accent-color: #0bf;
    --bg-color: #111;
    --text-color: #eee;
    --light-bg: #f9f9f9;
    --gradient-bg: linear-gradient(135deg, #0ff, #0bf);
  }
  
  html {
    scroll-padding-top: 120px;
  }
  
  /* Reset & Base Styles */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--bg-color);
    overflow-x: hidden;
  }
  
  /* Navbar with Animated Gradient Border */
  header {
    position: fixed;
    width: 100%;
    top: 0;
    background: rgba(0, 0, 0, 0.85);
    border-bottom: 3px solid transparent;
    background-clip: padding-box;
    z-index: 1000;
    animation: borderGradient 5s infinite linear;
  }
  @keyframes borderGradient {
    0% { border-color: var(--primary-color); }
    50% { border-color: var(--accent-color); }
    100% { border-color: var(--primary-color); }
  }
  .navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    color: var(--text-color);
  }
  .logo {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.8rem;
    color: var(--primary-color);
    text-shadow: 0 0 5px var(--primary-color);
  }
  .nav-links {
    list-style: none;
    display: flex;
  }
  .nav-links li {
    margin-left: 2rem;
  }
  .nav-links li a {
    text-decoration: none;
    color: var(--text-color);
    transition: color 0.3s, text-shadow 0.3s;
  }
  .nav-links li a:hover {
    color: var(--accent-color);
    text-shadow: 0 0 8px var(--accent-color);
  }
  /* Hamburger Menu (Mobile) */
  .hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
  }
  .hamburger span {
    height: 3px;
    width: 25px;
    background: var(--text-color);
    margin-bottom: 5px;
    border-radius: 5px;
  }
  .nav-links.active {
    display: flex;
    flex-direction: column;
    background: rgba(0, 0, 0, 0.9);
    position: absolute;
    top: 60px;
    right: 0;
    width: 200px;
    text-align: left;
  }
  /* Dark Mode Toggle Button */
  .dark-mode-toggle {
    padding: 0.5rem 1rem;
    background: var(--accent-color);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-left: 1rem;
    color: var(--bg-color);
  }
  
  /* Hero Section with Animated Gradient Overlay */
  .hero {
    height: 100vh;
    background: var(--gradient-bg), url('../images/hero-bg.jpg') no-repeat center center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    padding-top: 60px;
    animation: bgPulse 10s infinite alternate;
  }
  @keyframes bgPulse {
    from { filter: brightness(1); }
    to { filter: brightness(1.2); }
  }
  .hero::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background: rgba(0, 0, 0, 0.6);
  }
  .hero-content {
    position: relative;
    z-index: 2;
    color: var(--text-color);
    animation: fadeIn 1s ease-out;
  }
  .hero-content h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 3rem;
    margin-bottom: 1rem;
    letter-spacing: 2px;
  }
  .subtext {
    font-size: 1.2rem;
    opacity: 0.8;
  }
  
  /* Section Base Styles */
  section {
    padding: 4rem 0;
  }
  .container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
  }
  
/* Modern Techy Section Cards with Reduced Effects for Light Mode */
.section-card {
    position: relative;
    border-radius: 15px;
    padding: 2rem;
    margin: 2rem auto;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.08); /* Slightly increased opacity for less GPU strain */
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  
  .section-card::before {
    content: "";
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, #00ffff, #00bfff, #0099ff, #00ffff);
    background-size: 400%;
    z-index: -2;
    filter: blur(4px); /* Reduced blur intensity from 8px */
    animation: gradientShift 8s ease infinite; /* Slower animation duration */
    opacity: 0.6; /* Lower opacity for a subtler effect */
  }
  
  .section-card::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: inherit;
    backdrop-filter: blur(5px); /* Reduced from 10px */
    z-index: -1;
    border-radius: 15px;
    opacity: 0.5; /* Lowered for a more subtle glass effect */
  }
  
  @keyframes gradientShift {
    0% {
      background-position: 0% 50%;
    }
    50% {
      background-position: 100% 50%;
    }
    100% {
      background-position: 0% 50%;
    }
  }
  
  .section-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
  }
  
  
  /* Profile Section */
  .profile-content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
  }
  .profile-pic {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--accent-color);
  }
  
  /* Education Section */
  .table-container {
    overflow-x: auto;
    margin: 0 auto;
  }
  
  .education-table {
    width: 100%;
    max-width: 800px; /* Limits table width for better responsiveness */
    border-collapse: collapse;
    margin: 2rem auto; /* Centers the table */
  }
  .education-table th,
  .education-table td {
    border: 1px solid #ccc;
    padding: 0.75rem;
    text-align: center;
  }
  
  
  /* Projects Section */
  .projects h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
  }
  .project-item {
    background: var(--light-bg);
    color: #333;
    margin: 2rem 0;
    padding: 1.5rem;
    border-left: 4px solid var(--accent-color);
    text-align: left;
    border-radius: 5px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  .project-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
  }
  .project-item h3 {
    margin-bottom: 0.5rem;
  }
  .project-item p,
  .project-item ul {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
  }
  .project-item ul {
    margin-left: 1rem;
    list-style-type: disc;
  }
  
  /* Skills Section */
  .skills-list p {
    font-size: 1rem;
    margin: 0.5rem 0;
  }
  .skills-progress {
    margin-top: 2rem;
  }
  .skill h3 {
    margin-bottom: 0.5rem;
  }
  .progress-bar {
    background: #333;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 1rem;
  }
  .progress {
    background: var(--accent-color);
    padding: 0.5rem;
    color: #fff;
    text-align: right;
  }
  
  /* Extracurricular Activities Section */
  .activity-item {
    background: var(--light-bg);
    color: #333;
    padding: 1rem;
    margin: 1rem 0;
    border-left: 4px solid var(--accent-color);
    text-align: left;
    border-radius: 5px;
    transition: transform 0.3s ease;
  }
  .activity-item:hover {
    transform: translateY(-3px);
  }
  .activity-item h3 {
    margin-bottom: 0.5rem;
  }
  .activity-item span {
    font-size: 0.9rem;
    color: #666;
  }
  
  /* Contact Section */
  .contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 600px;
    margin: 0 auto;
  }
  .contact-form input,
  .contact-form textarea {
    padding: 0.75rem;
    border: 1px solid #ccc;
    border-radius: 5px;
    width: 100%;
  }
  .contact-form button {
    padding: 0.75rem 1.5rem;
    background: var(--accent-color);
    color: #fff;
    border: none;
    cursor: pointer;
    border-radius: 5px;
    transition: background 0.3s ease;
  }
  .contact-form button:hover {
    background: #0dcaf0;
  }
  
  /* Footer */
  footer {
    background: #000;
    color: var(--text-color);
    text-align: center;
    padding: 1rem 0;
  }
  
  /* Back to Top Button - Updated */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: linear-gradient(45deg, #00bfff, #00ffff);
    color: #fff;
    border: none;
    padding: 0.75rem 1rem;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
    z-index: 1001;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
  }
  .back-to-top.visible {
    opacity: 1;
    visibility: visible;
  }
  .back-to-top:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.7);
  }
  
  
  /* Animations */
  @keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }
  
  /* Dark Mode Overrides */
  body.dark-mode {
    background: #000 !important;
    color: #eee !important;
  }
  body.dark-mode header,
  body.dark-mode footer {
    background: #111 !important;
  }
  body.dark-mode .nav-links li a {
    color: #eee !important;
  }
  body.dark-mode .dark-mode-toggle {
    background: var(--primary-color) !important;
  }
  body.dark-mode .section-card {
    background: #1a1a1a !important;
    color: #eee !important;
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.1) !important;
  }
  body.dark-mode .section-card::before {
    background: linear-gradient(45deg, #00aaff, #0088ff, #0066ff, #00aaff) !important;
  }
  body.dark-mode .section-card::after {
    background: inherit !important;
    opacity: 0.8 !important;
  }
  body.dark-mode .education-table th,
  body.dark-mode .education-table td {
    border: 1px solid #444 !important;
    background: #1a1a1a !important;
    color: #eee !important;
  }
  body.dark-mode .contact-form input,
  body.dark-mode .contact-form textarea {
    background: #333 !important;
    border: 1px solid #444 !important;
    color: #eee !important;
  }
  body.dark-mode .project-item,
  body.dark-mode .activity-item {
    background: #1a1a1a !important;
    color: #eee !important;
  }
  
  /* Responsive Styles */
  @media (max-width: 768px) {
    .nav-links {
      display: none;
    }
    .hamburger {
      display: flex;
    }
    .profile-content,
    .project-item,
    .activity-item {
      flex-direction: column;
      text-align: center;
    }
  }