* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }

    body {
      background: #1f1f1f;
      color: #efefef;
      height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .container {
      text-align: center;
      max-width: 600px;
      padding: 40px;
    }

    h1 {
      font-size: 120px;
      color: blue;
      letter-spacing: 10px;
      margin-bottom: 10px;
      text-shadow: 0 0 20px rgba(0,0,255,0.5);
    }

    h2 {
      font-size: 28px;
      margin-bottom: 20px;
    }

    p {
      color: #aaa;
      margin-bottom: 30px;
      line-height: 1.5;
    }

    .btn {
      display: inline-block;
      padding: 12px 30px;
      border: 1px solid blue;
      color: #efefef;
      text-decoration: none;
      border-radius: 30px;
      transition: all 0.3s ease;
    }

    .btn:hover {
      background: blue;
      box-shadow: 0 0 15px rgba(0,0,255,0.6);
    }

    /* subtle animated grid background */
    .grid {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
                        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
      background-size: 40px 40px;
      animation: moveGrid 10s linear infinite;
      z-index: 0;
    }

    @keyframes moveGrid {
      from { transform: translate(0,0); }
      to { transform: translate(40px,40px); }
    }

    .container {
      position: relative;
      z-index: 1;
    }

    /* glowing circle */
    .glow {
      position: absolute;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(0,0,255,0.3), transparent 70%);
      border-radius: 50%;
      filter: blur(40px);
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      z-index: 0;
    }