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

    body {
      font-family: Arial, sans-serif;
      
      background: #F8F8FF;
  background: url(images/banner-03.jpg);
  background-position: center center;
      color: #fff;
      line-height: 1.6;
    }

    header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: rgba(0, 0, 0, 0.6);
      padding: 10px 20px;
      position: sticky;
      top: 0;
      z-index: 1000;
    }

    header .logo img {
      height: 50px;
      border-radius: 6px;
    }

    .menu {
      display: flex;
      gap: 20px;
      list-style: none;
    }

    .menu li a {
      text-decoration: none;
      color: #fff;
      font-weight: bold;
      transition: color 0.3s;
    }

    .menu li a:hover {
      color: #f1c40f;
    }

    .toggle {
      display: none;
      background: #27ae60;
      color: #fff;
      padding: 8px 12px;
      border-radius: 6px;
      cursor: pointer;
      font-size: 14px;
    }

    section {
      text-align: center;
      padding: 60px 20px;
    }

    h1.register {
      font-size: clamp(22px, 4vw, 36px);
      margin-bottom: 20px;
      font-weight: bold;
    }

    h1.register a {
      color: #fff;
      text-decoration: none;
    }

    .advert {
      margin-top: 30px;
    }

    .register-second a {
      display: inline-block;
      padding: 12px 25px;
      font-size: clamp(16px, 3vw, 20px);
      background: #f1c40f;
      color: #2c3e50;
      text-decoration: none;
      border-radius: 8px;
      transition: 0.3s;
    }

    .register-second a:hover {
      background: #d4ac0d;
    }

    /* Mobile responsiveness */
    @media (max-width: 768px) {
      .menu {
        display: none;
        flex-direction: column;
        background: rgba(0, 0, 0, 0.9);
        position: absolute;
        top: 60px;
        right: 20px;
        width: 220px;
        padding: 15px;
        border-radius: 8px;
      }

      .menu.active {
        display: flex;
      }

      .toggle {
        display: block;
      }
    }