body {
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      height: 100vh;
      margin: 0;
      background-color: #0b0b0b;
      font-family: 'Orbitron', sans-serif;
      overflow: hidden;
    }

    .main-wrapper {
      text-align: center;
      z-index: 2;
      animation: fadeIn 1.5s ease-in-out;
    }

    h1 {
      font-size: 64px;
      margin-bottom: 20px;
      color: #00ff88;
      letter-spacing: 2px;
      text-transform: uppercase;
      animation: float 3s ease-in-out infinite;
    }

    .subtitle {
      font-size: 18px;
      color: #ccc;
      margin-bottom: 40px;
      animation: fadeIn 2s ease-in-out;
    }

    .start-btn {
      font-size: 18px;
      padding: 12px 28px;
      background: linear-gradient(45deg, #00ff88, #00c4ff);
      color: #000;
      border: none;
      border-radius: 30px;
      cursor: pointer;
      font-weight: bold;
      box-shadow: 0 0 12px #00ff8866;
      transition: all 0.3s ease;
    }

    .start-btn:hover {
      box-shadow: 0 0 20px #00ff88, 0 0 40px #00c4ff;
      transform: scale(1.05);
    }

    .particles {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      overflow: hidden;
      z-index: 1;
      pointer-events: none;
    }

    .circle {
      position: absolute;
      width: 12px;
      height: 12px;
      background: #00ff8866;
      border-radius: 50%;
      animation: move 10s linear infinite;
    }

    @keyframes float {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-10px); }
    }

    @keyframes move {
      0% {
        transform: translateY(100vh) translateX(0);
        opacity: 0.2;
      }
      100% {
        transform: translateY(-10vh) translateX(20px);
        opacity: 0;
      }
    }

    @keyframes fadeIn {
      from { opacity: 0; }
      to { opacity: 1; }
    }