* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: Arial, sans-serif;
    }

    body {
      background: url('https://images.unsplash.com/photo-1587614203976-365c74645e83?auto=format&fit=crop&w=1350&q=80') no-repeat center center/cover;
      min-height: 100vh;
      color: white;
    }
    /* Navbar */
    nav {
      background-color: #001f3f;
      padding: 20px 50px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      position: fixed;
      width: 100%;
      top: 0;
      left: 0;
      z-index: 1000;
      box-shadow: 0 2px 10px rgba(0,0,0,0.15);
    }

    nav .logo {
      color: white;
      font-size: 24px;
      font-weight: bold;
    }

    nav .logo span {
      color: orange;
    }

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

    nav ul li a {
      color: white;
      text-decoration: none;
      font-weight: 600;
      font-size: 16px;
      padding: 6px 10px;
      border-radius: 4px;
      transition: background-color 0.3s ease;
    }

    nav ul li a:hover {
      background-color: orange;
      color: black;
    }

    /* Main container */
    .form-container {
      background-color: white;
      max-width: 500px;
      margin: 120px auto 60px;
      padding: 40px 35px;
      border-radius: 8px;
      box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    }

    .form-container h2 {
      text-align: center;
      margin-bottom: 30px;
      font-size: 28px;
      color: #001f3f;
      font-weight: 700;
    }

    form .form-group {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 20px;
    }

    form .form-group input {
      flex: 1 1 48%;
      padding: 12px 15px;
      border: 1px solid #ccc;
      border-radius: 6px;
      font-size: 16px;
      transition: border-color 0.3s ease;
    }

    form .form-group input:focus {
      outline: none;
      border-color: orange;
      box-shadow: 0 0 5px orange;
    }

    /* Gender section */
    .gender {
      margin-bottom: 25px;
      color: #001f3f;
      font-weight: 600;
      display: flex;
      gap: 20px;
      justify-content: center;
    }

    .gender label {
      cursor: pointer;
      font-weight: 600;
    }

    .gender input[type="radio"] {
      margin-right: 6px;
      cursor: pointer;
      accent-color: orange;
    }

    /* Submit button */
    button.register-btn {
      width: 100%;
      padding: 14px 0;
      font-size: 18px;
      font-weight: 700;
      color: black;
      background-color: orange;
      border: none;
      border-radius: 6px;
      cursor: pointer;
      transition: background-color 0.3s ease;
    }

    button.register-btn:hover {
      background-color: #cc7a00;
    }

    /* Responsive */
    @media (max-width: 600px) {
      nav {
        flex-direction: column;
        align-items: flex-start;
      }

      nav ul {
        flex-direction: column;
        width: 100%;
        margin-top: 10px;
      }

      nav ul li {
        margin-bottom: 12px;
      }

      form .form-group input {
        flex: 1 1 100%;
      }

      .gender {
        flex-direction: column;
        gap: 12px;
      }
    }