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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: 'Segoe UI', sans-serif;
      background-color: #f4f9fb;
      color: #002b40;
      line-height: 1.6;
      width: 100%;
      overflow-x: hidden;
    }

    header {
      background: #fff;
      padding: 20px 40px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      position: sticky;
      top: 0;
      z-index: 1000;
    }

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

    .logo img {
      height: 90px;
      width: 300px;
    }

    .hamburger {
      display: none;
      font-size: 1.5rem;
      background: none;
      border: none;
      color: #002b40;
      cursor: pointer;
      padding: 10px;
      z-index: 1100;
    }

    .hamburger.active {
      background-color: #009639;
      color: #ffffff;
      border-radius: 4px;
    }

    .navbar ul {
      display: flex;
      list-style: none;
      gap: 30px;
      position: relative;
    }

    .navbar a {
      text-decoration: none;
      color: #004466;
      font-weight: 600;
      padding: 10px 15px;
      border-radius: 6px;
      transition: all 0.3s ease;
    }

    .navbar a:hover,
    .navbar a:focus {
      color: #ffffff;
      background-color: #009639;
      box-shadow: 0 4px 10px rgba(0, 122, 94, 0.2);
      outline: none;
    }

    .dropdown {
      position: relative;
    }

    .dropdown-menu {
      display: none;
      position: absolute;
      background: white;
      box-shadow: 0 4px 8px rgba(0,0,0,0.1);
      top: 40px;
      left: 0;
      min-width: 150px;
      border-radius: 8px;
      z-index: 999;
      padding: 10px 0;
    }

    .dropdown:hover .dropdown-menu,
    .dropdown.active .dropdown-menu {
      display: block;
    }

    .dropdown-menu a {
      display: block;
      padding: 8px 16px;
      color: #004466;
      text-decoration: none;
    }

    .dropdown-menu a:hover,
    .dropdown-menu a:focus {
      background-color: #009639;
      color: #ffffff;
    }

    .dropdown > a::after {
      content: " ▼";
      font-size: 0.6em;
      color: #004466;
    }

    .profile-section {
      max-width: 900px;
      margin: 40px auto;
      padding: 0 20px;
    }

    .profile-section h1 {
      text-align: center;
      color: #004466;
      font-weight: bold;
      margin-bottom: 30px;
      font-size: 2.5em;
    }

    .profile-section p {
      font-size: 1.1em;
      color: #555;
      margin-bottom: 15px;
    }

    .profile-section ul {
      margin-top: 20px;
      padding-left: 20px;
    }

    .profile-section ul li {
      font-size: 1em;
      color: #333;
      margin: 10px 0;
    }

    .expertise-heading {
      text-align: center;
      margin: 40px 0 30px;
      color: #004466;
      font-size: 2.2em;
      position: relative;
    }

    .expertise-heading::after {
      content: '';
      width: 100px;
      height: 4px;
      background: linear-gradient(to right, #004466, #004466);
      position: absolute;
      bottom: -10px;
      left: 50%;
      transform: translateX(-50%);
      border-radius: 2px;
    }

    .expertise-cards {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px 60px;
    }

    .expertise-card {
      background: #fff;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      position: relative;
      padding: 20px;
      text-align: center;
      opacity: 0;
      transform: rotateY(90deg);
      transition: all 1s ease;
      will-change: transform, opacity;
    }

    .expertise-card.visible {
      opacity: 1;
      transform: rotateY(0deg);
    }

    .expertise-card:hover {
      transform: translateY(-10px) scale(1.02);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    }

    .expertise-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 5px;
      background: linear-gradient(to right, #004466, #004466);
      transition: height 0.3s ease;
    }

    .expertise-card:hover::before {
      height: 8px;
    }

    .expertise-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      border-radius: 8px;
      margin-bottom: 15px;
      transition: transform 0.3s ease;
    }

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

    .expertise-card h3 {
      font-size: 1.4em;
      color: #004466;
      margin-bottom: 10px;
    }

    .expertise-card p {
      font-size: 0.95em;
      color: #666;
      line-height: 1.5;
      padding: 0 10px;
    }

    .footer-content {
      background: #dde8ee;
      color: #004466;
      text-align: center;
      padding: 30px;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .footer-content h1 {
      font-size: 1.8em;
      margin-bottom: 15px;
    }

    .footer-content p {
      font-size: 1em;
      margin-bottom: 10px;
    }

    .footer-content a {
      color: #0099cc;
      text-decoration: none;
      margin: 0 10px;
    }

    .footer-content a:hover,
    .footer-content a:focus {
      text-decoration: underline;
    }

    footer {
      background-color: #002b40;
      color: white;
      text-align: center;
      padding: 20px;
      font-size: 0.9rem;
    }

    .back-to-top {
      position: fixed;
      bottom: 20px;
      right: 20px;
      display: none;
      background: #007A5E;
      color: white;
      border: none;
      border-radius: 50%;
      width: 40px;
      height: 40px;
      font-size: 20px;
      cursor: pointer;
      transition: background-color 0.3s ease, transform 0.3s ease;
    }

    .back-to-top:hover {
      background-color: #009639;
      transform: scale(1.05);
    }

    .back-to-top.visible {
      display: block;
    }

    main {
      min-height: calc(100vh - 300px);
    }

    @media (max-width: 768px) {
      .hamburger {
        display: block;
      }

      .navbar ul {
        display: none;
        position: fixed;
        top: 0;
        left: -250px;
        width: 250px;
        height: 100vh;
        background: #ffffff;
        box-shadow: 2px 0 8px rgba(0, 0, 0, 0.2);
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        gap: 10px;
        padding: 20px 0;
        transition: left 0.3s ease;
      }

      .navbar ul.active {
        display: flex;
        left: 0;
      }

      .navbar ul li {
        width: 100%;
        text-align: left;
        padding-left: 20px;
        margin-bottom: 10px;
      }

      .navbar ul li a {
        font-size: 1.1rem;
        padding: 12px 20px;
        display: block;
        color: #004466;
      }

      .dropdown .dropdown-menu {
        display: none !important;
        position: static;
        background: #ffffff;
        box-shadow: none;
        padding: 10px 0;
        max-width: 100%;
        border-radius: 0;
      }

      .dropdown.active .dropdown-menu {
        display: block !important;
      }

      .dropdown:hover .dropdown-menu,
      .navbar ul li:hover .dropdown-menu {
        display: none ;
      }

      .dropdown > a {
        position: relative;
      }

      .dropdown > a::after {
        content: "▶";
        position: absolute;
        right: 20px;
        font-size: 0.8rem;
        color: #004466;
      }

      .dropdown.active > a::after {
        content: "▼";
      }

      .dropdown-menu a {
        padding-left: 40px;
        font-size: 1rem;
        color: #004466;
        font-weight: 700;
      }
      .dropdown-menu a:hover {
        background-color:#009639;
        color:#f0f0f0;
      }
      .logo img {
        height: 50px;
        width: 180px;
      }
      .dropdown-toggle {
        cursor: pointer;
      }
      .header-content {
        flex-wrap: wrap;
      }
      header {
        padding: 10px 20px;
      }

      

      .expertise-heading {
        font-size: 2em;
      }

      .expertise-card {
        padding: 15px;
      }

      .expertise-card img {
        height: 150px;
      }
    }

    @media (max-width: 600px) {
      .logo img {
        height: 50px;
        width: 180px;
      }

      header {
        padding: 10px 20px;
      }

      .header-content {
        flex-wrap: wrap;
      }

      .profile-section h1 {
        font-size: 2em;
      }

      .expertise-heading {
        font-size: 1.8em;
      }

      .expertise-card {
        width: 98%;
        margin: 0 auto;
      }

      .expertise-card img {
        height: 200px;
      }

      .expertise-card h3 {
        font-size: 1.2em;
      }

      .expertise-card p {
        font-size: 0.9em;
      }

      .footer-content h1 {
        font-size: 1.5em;
      }
    }