* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }
    body {
      margin: 0;
      background-color: #ffffff;
      line-height: 1.6;
    }

    /* Navbar Container */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background-color: #ffffff;
      backdrop-filter: blur(10px);
      z-index: 1000;
      transition: all 0.3s ease;
    }
    .nav-container {
      max-width: 1300px;
      margin: 0 auto;
      padding: 0 2rem;
      height: 80px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    /* Circular "SE" Logo */
    .logo-container {
      width: 48px;
      height: 48px;
      background-color: #4CAF50;
      border-radius: 50%;
      display: flex;
      justify-content: center;
      align-items: center;
      text-decoration: none;
      transition: transform 0.3s ease;
    }
    .logo-container:hover {
      transform: scale(1.1);
    }
    .logo-text {
      font-size: 1.2rem;
      font-weight: 700;
      color: #ffffff;
      letter-spacing: 1px;
    }

    /* Menu Links */
    .nav-menu {
      display: flex;
      list-style: none;
      gap: 2.5rem;
    }
    .nav-link {
      position: relative;
      text-decoration: none;
      color: black;
      font-size: 1rem;
      font-weight: 500;
      padding: 0.75rem 0;
      transition: color 0.3s ease;
      display: flex;
      align-items: center;
    }
    .material-symbols-outlined {
        margin-right: 0.5rem;
    }
    .nav-link:hover {
      color: #4CAF50;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 3px;
      background: #4CAF50;
      border-radius: 3px;
      transition: width 0.3s ease;
    }
    .nav-link:hover::after {
      width: 100%;
    }

    /* Buttons & Language Selector */
    .nav-buttons {
      display: flex;
      align-items: center;
      gap: 1rem;
    }
    .btn {
      padding: 0.75rem 1.5rem;
      border-radius: 8px;
      font-weight: 600;
      font-size: 1rem;
      text-decoration: none;
      transition: all 0.3s ease;
    }
    .btn-signup {
      background: #4CAF50;
      color: #ffffff;
      border: none;
    }
    .btn-signup:hover {
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
    }
    .btn-login {
      background: transparent;
      color: black;
      display: inline-block;
      align-items: center;
      justify-content: center;
      padding: 0.625rem;
      font-size: 1.5rem;
    }
    .btn-login:hover {
      color: #4CAF50;
    }

    /* Language Selector */
    .language-selector {
      position: relative;
      display: inline-block;
    }
    .lang-btn {
      background: transparent;
      border: none;
      cursor: pointer;
      font-size: 1.5rem;
      color: #000000;
      padding: 0.625rem;
      border-radius: 8px;
      transition: all 0.3s ease;
    }
    .lang-btn:hover {
      color: #4CAF50;
    }
    .lang-menu {
      position: absolute;
      top: 100%;
      right: 0;
      margin-top: 0.5rem;
      background: #ffffff;
      border-radius: 8px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
      list-style: none;
      overflow: hidden;
      display: none;
      white-space: nowrap;
      z-index: 1000;
      min-width: 120px;
    }
    .language-selector.open .lang-menu {
      display: block;
    }
    .lang-menu li {
      padding: 0.75rem 1rem;
      cursor: pointer;
      font-size: 0.875rem;
      color: black;
      transition: all 0.2s ease;
      text-decoration: none;
    }
    .lang-menu li a {
      text-decoration: none;
      color: inherit;
    }
    .lang-menu li a:hover {
      color: lightgreen;
    }


    /* Hide mobile-buttons by default */
    .nav-buttons-mobile {
      display: none;
    }

    /* Hamburger (mobile) */
    .hamburger {
      display: none;
      cursor: pointer;
      background: none;
      border: none;
      flex-direction: column;
      gap: 5px;
      padding: 0.625rem;
    }
    .hamburger span {
      width: 25px;
      height: 3px;
      background: black;
      border-radius: 3px;
      transition: all 0.3s ease;
    }

    /* Mobile Styles */
    @media (max-width: 992px) {
      .nav-container {
        padding: 0 1.5rem;
      }
      
      .hamburger {
        display: flex;
      }

      .nav-menu {
        position: fixed;
        top: -100vh;
        left: 0;
        width: 100%;
        height: 100vh;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        background: #ffffff;
        transition: top 0.3s ease;
        padding: 2.5rem 1.5rem;
        gap: 0;
      }
      .nav-menu.active {
        top: 0;
      }
      .nav-menu .nav-link {
        font-size: 1.25rem;
        margin: 0.5rem 0;
        padding: 1rem 0;
      }
      .nav-divider {
        width: 100%;
        height: 1px;
        background:#eeeeee;
        margin: 1rem 0; /* Space above and below divider */
      }

      /* Show mobile-buttons and hide desktop-buttons */
      .nav-buttons-mobile {
        display: flex;
        flex-direction: column;
        gap: 1rem;
        margin-top: 0;
      }
      .nav-buttons {
        display: none;
      }

      /* Animate hamburger to X */
      .hamburger.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
      }
      .hamburger.active span:nth-child(2) {
        opacity: 0;
      }
      .hamburger.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
      }
    }

    @media (max-width: 768px) {
      .nav-container {
        padding: 0 1rem;
        height: 70px;
      }
      .logo-container {
        width: 40px;
        height: 40px;
      }
      .logo-text {
        font-size: 1rem;
      }
    }

    /* MAIN CONTENT AREA */
    .content {
      flex-grow: 1;
      background: #ffffff;
      transition: margin-left 0.3s;
      position: relative;
      width: 100%;
      min-height: 100vh;
      overflow: auto;
      padding-top: 80px; /* Account for fixed navbar */
    }

    @media (max-width: 768px) {
      .content {
        padding-top: 70px;
      }
    }

    /* Enhanced SymbioEd Section Styles */
    .symbioed-section {
      position: relative;
      width: 100%; 
      min-height: 50vh;
      display: flex;
      align-items: center; 
      justify-content: center;
      text-align: center;
      color: black;
      overflow: hidden;
      background: #ffffff;
      padding: 3rem 1.5rem;
    }

    @media (max-width: 768px) {
      .symbioed-section {
        min-height: 50vh;
        padding: 2rem 1rem;
      }
    }

    /* 3D PARTICLE CANVAS */
    #particles-canvas {
      position: absolute;
      top: 0; 
      left: 0; 
      width: 100%; 
      height: 100%;
      z-index: 0;
    }

    /* TEXT CONTENT */
    .symbioed-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
      padding: 1.5rem 1rem;
    }
    .symbioed-content h1 {
      font-size: clamp(3rem, 8vw, 5rem);
      font-weight: 700;
      color: #4CAF50;
      display: inline-block;
      overflow: hidden;
      margin-bottom: 1rem;
      line-height: 1.1;
    }
    .symbioed-content h1 span {
      display: inline-block;
      opacity: 0;
      transform: translateY(20px);
      animation: fadeInUp 0.5s ease forwards;
    }
    /* stagger each letter */
    .symbioed-content h1 span:nth-child(1) { animation-delay: 0.3s; }
    .symbioed-content h1 span:nth-child(2) { animation-delay: 0.4s; }
    .symbioed-content h1 span:nth-child(3) { animation-delay: 0.5s; }
    .symbioed-content h1 span:nth-child(4) { animation-delay: 0.6s; }
    .symbioed-content h1 span:nth-child(5) { animation-delay: 0.7s; }
    .symbioed-content h1 span:nth-child(6) { animation-delay: 0.8s; }
    .symbioed-content h1 span:nth-child(7) { animation-delay: 0.9s; }
    .symbioed-content h1 span:nth-child(8) { animation-delay: 1.0s; }

    .symbioed-content p {
      font-size: clamp(1.25rem, 4vw, 1.8rem);
      font-weight: 300;
      margin-top: 1rem;
      opacity: 0;
      transform: translateY(20px);
      animation: fadeInUp 0.5s ease forwards 1.2s;
      line-height: 1.4;
      color: #555;
    }

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

    @media (max-width: 768px) {
      .symbioed-content {
        padding: 1.5rem 1rem;
      }
    }

    @media (max-width: 480px) {
      .symbioed-content {
        padding: 1.25rem 0.75rem;
      }
    }

    /* MISSION SECTION */
    .mission-section {
      position: relative;
      padding: 5rem 1.5rem;
      background-color: #ffffff;
      overflow: hidden;
    }

    .mission-container {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 2.5rem;
      max-width: 1100px;
      margin: 0 auto;
      perspective: 1000px;
    }

    .mission-card {
      flex: 1;
      min-width: 300px;
      max-width: 500px;
      background: #ffffff;
      border-radius: 20px;
      padding: 2.5rem 2rem;
      box-shadow: 0 10px 30px rgba(0,0,0,0.05);
      text-align: center;
      transition: all 0.4s ease;
      transform-style: preserve-3d;
      position: relative;
      overflow: hidden;
      z-index: 1;
    }

    .mission-card:hover {
      transform: translateY(-10px) rotate(2deg);
      box-shadow: 0 15px 40px rgba(76,175,80,0.15);
    }

    .mission-card::before {
      content: "";
      position: absolute;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background: radial-gradient(circle, rgba(76,175,80,0.1) 0%, transparent 70%);
      z-index: -1;
      opacity: 0;
      transition: opacity 0.5s ease;
    }

    .mission-card:hover::before {
      opacity: 1;
    }

    .mission-icon {
      font-size: 3.75rem;
      color: #4CAF50;
      margin-bottom: 1.25rem;
      display: inline-block;
      transition: transform 0.5s ease;
    }

    .mission-card:hover .mission-icon {
      transform: scale(1.1) rotate(5deg);
    }

    .mission-card p {
      font-size: clamp(1rem, 2.5vw, 1.1rem);
      font-weight: 400;
      color: #555;
      line-height: 1.6;
      margin-top: 1.25rem;
    }

    /* Floating animation */
    @keyframes float {
      0%, 100% { transform: translateY(0) rotate(0); }
      50% { transform: translateY(-10px) rotate(3deg); }
    }

    .mission-card:nth-child(1) {
      animation: float 8s ease-in-out infinite;
    }

    .mission-card:nth-child(2) {
      animation: float 8s ease-in-out infinite 2s;
    }

    /* Dynamic background elements */
    .mission-bg-element {
      position: absolute;
      border-radius: 50%;
      filter: blur(40px);
      opacity: 0.15;
      z-index: 0;
    }

    .mission-bg-1 {
      width: 300px;
      height: 300px;
      background: #4CAF50;
      top: 10%;
      left: 5%;
      animation: move 20s linear infinite;
    }

    .mission-bg-2 {
      width: 200px;
      height: 200px;
      background: #4CAF50;
      bottom: 10%;
      right: 5%;
      animation: move 25s linear infinite reverse;
    }

    @keyframes move {
      0% { transform: translate(0, 0) rotate(0deg); }
      25% { transform: translate(20px, 40px) rotate(90deg); }
      50% { transform: translate(40px, 0) rotate(180deg); }
      75% { transform: translate(20px, -40px) rotate(270deg); }
      100% { transform: translate(0, 0) rotate(360deg); }
    }

    /* RESPONSIVE ADJUSTMENTS */
    @media (max-width: 900px) {
      .mission-section {
        padding: 4rem 1.25rem;
      }
      .mission-container {
        gap: 2rem;
      }
      .mission-card {
        padding: 2rem 1.5rem;
      }
      .mission-icon {
        font-size: 3.125rem;
      }
    }

    @media (max-width: 768px) {
      .mission-section {
        padding: 3.75rem 1rem;
      }
      .mission-container {
        flex-direction: column;
        align-items: center;
        gap: 2.5rem;
      }
      .mission-card {
        min-width: 100%;
        max-width: 100%;
        padding: 2rem 1.5rem;
        margin: 0 auto;
      }
      .mission-bg-1,
      .mission-bg-2 {
        display: none;
      }
    }

    @media (max-width: 480px) {
      .mission-section {
        padding: 3rem 0.75rem;
      }
      .mission-card {
        padding: 1.75rem 1.25rem;
      }
      .mission-icon {
        font-size: 2.8rem;
        margin-bottom: 1rem;
      }
    }

    /* Quickstart Section */
    .quickstart-section {
      position: relative;
      padding: 5rem 1.5rem;
      background-color: #ffffff;
      overflow: hidden;
    }

    .quickstart-container {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      align-items: center;
      gap: 2.5rem;
      max-width: 1200px;
      margin: 0 auto;
    }

    .quickstart-text {
      flex: 1;
      min-width: 300px;
      max-width: 500px;
      text-align: left;
    }

    .quickstart-text h2 {
      font-size: clamp(2.5rem, 6vw, 3rem);
      font-weight: 700;
      color: #1E3A8A;
      margin-bottom: 1rem;
      line-height: 1.2;
    }

    .quickstart-text p {
      font-size: clamp(1rem, 2.5vw, 1.1rem);
      font-weight: 400;
      color: #555;
      line-height: 1.6;
      margin-bottom: 1.75rem;
    }

    .quickstart-button {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      padding: 0.875rem 1.5rem;
      font-size: 0.95rem;
      font-weight: 600;
      text-transform: uppercase;
      text-decoration: none;
      color: #4CAF50;
      border: 2px solid #4CAF50;
      border-radius: 50px;
      transition: all 0.3s ease;
    }

    .quickstart-button:hover {
      background-color: #4CAF50;
      color: #ffffff;
      transform: scale(1.05);
    }

    .quickstart-button span {
      font-size: 1.2rem;
    }

    .quickstart-graphic {
      flex: 1;
      min-width: 300px;
      max-width: 500px;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .quickstart-image {
      max-width: 100%;
      height: auto;
      max-height: 350px;
      object-fit: contain;
      border-radius: 20px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    }

    /* Responsive Adjustments */
    @media (max-width: 900px) {
      .quickstart-section {
        padding: 4rem 1.25rem;
      }
      .quickstart-container {
        gap: 2rem;
      }
      .quickstart-button {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
      }
    }

    @media (max-width: 768px) {
      .quickstart-section {
        padding: 3.75rem 1rem;
      }
      .quickstart-container {
        flex-direction: column-reverse;
        align-items: center;
      }
      .quickstart-text,
      .quickstart-graphic {
        min-width: 100%;
        max-width: 100%;
        text-align: center;
      }
      .quickstart-text {
        display: flex;
        flex-direction: column;
        align-items: center;
      }
      .quickstart-image {
        max-height: 280px;
      }
    }

    @media (max-width: 480px) {
      .quickstart-section {
        padding: 3rem 0.75rem;
      }
      .quickstart-button {
        padding: 0.625rem 1rem;
        font-size: 0.85rem;
      }
      .quickstart-image {
        max-height: 220px;
      }
    }

    /* About Section Styles */
    .about-section {
      padding: 4rem 1rem;
      background: #fff;
      overflow: hidden;
    }

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

    .about-container h2 {
      font-size: clamp(2rem, 5vw, 2.3rem);
      font-weight: 700;
      text-align: center;
      margin-bottom: 2.5rem;
      color: #4CAF50;
      line-height: 1.2;
    }

    .about-content {
      display: flex;
      flex-wrap: wrap;
      gap: 1.75rem;
      align-items: center;
      justify-content: center;
      background: #f9f9f9;
      padding: 1.5rem;
      border-radius: 15px;
    }

    .about-image, .about-text {
      flex: 1;
      min-width: 200px;
      max-width: 250px;
    }

    .about-image img {
      width: 100%;
      aspect-ratio: 1/1;
      object-fit: cover;
      border-radius: 15px;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
    }

    .about-text {
      text-align: left;
    }

    .about-text h3 {
      font-size: clamp(1.25rem, 3vw, 1.5rem);
      font-weight: 600;
      color: black;
      margin-bottom: 0.75rem;
      line-height: 1.3;
    }

    .about-text p {
      font-size: clamp(1rem, 2.5vw, 1.1rem);
      color: #555;
      line-height: 1.5;
      font-style: italic;
      margin-bottom: 1.5rem;
    }

    .about-button {
      display: inline-flex;
      align-items: center;
      gap: 0.375rem;
      padding: 0.75rem 1.25rem;
      font-size: 0.85rem;
      text-transform: uppercase;
      font-weight: 600;
      border: 2px solid #4CAF50;
      border-radius: 50px;
      color: #4CAF50;
      text-decoration: none;
      transition: all 0.3s ease;
    }

    .about-button:hover {
      background: #4CAF50;
      color: #fff;
      transform: scale(1.03);
    }

    @media (max-width: 768px) {
      .about-section {
        padding: 3.75rem 1rem;
      }
      .about-content {
        flex-direction: column;
        text-align: center;
        padding: 1.25rem;
      }
      .about-text {
        text-align: center;
        align-items: center;
        display: flex;
        flex-direction: column;
      }
      .about-image, .about-text {
        min-width: 100%;
        max-width: 300px;
      }
    }

    @media (max-width: 480px) {
      .about-section {
        padding: 3rem 0.75rem;
      }
      .about-content {
        padding: 1rem;
      }
    }

    /* Footer Styles */
    footer {
        background: linear-gradient(to bottom, #ffffff, #34C759);
        padding: 1.5rem 2.5rem;
        color: #FFFFFF;
        position: relative;
    }
    .footer-container {
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
        max-width: 1200px;
        margin: 0 auto;
    }
    .footer-columns-wrapper {
        display: flex;
        flex: 1;
        gap: 2.5rem;
    }
    .footer-column h4 {
        color: #A9A9A9;
        font-size: 0.75rem;
        text-transform: uppercase;
        margin-bottom: 0.75rem;
        font-family: 'Inter', sans-serif;
        font-weight: 500;
        letter-spacing: 0.5px;
    }
    .footer-column ul {
        list-style: none;
        padding: 0;
    }
    .footer-column li {
        margin-bottom: 0.625rem;
    }
    .footer-column a {
        color: black;
        text-decoration: none;
        font-size: 0.875rem;
        font-family: 'Inter', sans-serif;
        font-weight: 400;
        transition: color 0.3s ease;
    }
    .footer-column a:hover {
        color: #ffffff;
    }
    .footer-copyright {
        color: #FFFFFF;
        font-size: 0.875rem;
        font-family: 'Inter', sans-serif;
        font-weight: 400;
        display: flex;
        align-items: center;
        gap: 0.25rem;
        margin-top: 1rem;
    }
    .copyright-icon {
        font-size: 1rem;
    }
    
    @media (max-width: 768px) {
        footer {
            padding: 1.5rem 1rem;
        }
        .footer-container {
            flex-direction: column;
            gap: 1.5rem;
        }
        .footer-columns-wrapper {
            flex-direction: column;
            gap: 1.5rem;
        }
        .footer-copyright {
            margin-top: 0;
            justify-content: center;
        }
    }

    @media (max-width: 480px) {
        footer {
            padding: 1.25rem 0.75rem;
        }
        .footer-columns-wrapper {
            gap: 1.25rem;
        }
    }