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

    body {
      font-family: Poppins, sans-serif;
      background: #f4f4f4;
    }

    header {
      width: 100%;
      background: rgba(255, 255, 255, 0.8);
      backdrop-filter: blur(10px);
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 30px;
      position: fixed;
      top: 0;
      z-index: 1000;
      box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    }

    .logo {
      font-size: 1.5rem;
      font-weight: 600;
      color: #333;
    }

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

    nav ul {
      display: flex;
      list-style: none;
      gap: 25px;
    }

    nav ul li a {
      text-decoration: none;
      color: #333;
      font-weight: 500;
      transition: color 0.3s;
    }

    nav ul li a:hover {
      color: #007bff;
    }

    .contact-btn {
      background: #007bff;
      color: #fff;
      padding: 8px 16px;
      border: none;
      border-radius: 6px;
      cursor: pointer;
      transition: 0.3s;
    }

    .contact-btn:hover {
      background: #0056b3;
    }

    .hamburger {
      display: none;
      flex-direction: column;
      cursor: pointer;
      gap: 5px;
    }

    .hamburger span {
      width: 25px;
      height: 3px;
      background: #333;
      border-radius: 3px;
      transition: 0.3s;
    }

    /* Responsive */
    @media (max-width: 768px) {
      nav ul {
        position: fixed;
        top: 70px;
        right: -100%;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.9);
        backdrop-filter: blur(10px);
        width: 220px;
        height: 100vh;
        justify-content: start;
        align-items: center;
        gap: 25px;
        padding-top: 50px;
        transition: right 0.4s ease;
      }

      nav ul.active {
        right: 0;
      }

      .hamburger {
        display: flex;
      }
    }

    .hamburger.active span:nth-child(1) {
      transform: rotate(45deg) translateY(8px);
    }

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

    .hamburger.active span:nth-child(3) {
      transform: rotate(-45deg) translateY(-8px);