body {
      font-family: Arial, sans-serif;
      background: linear-gradient(180deg, #0f172a, #1e293b);
      color: white;
      text-align: center;
      padding: 0;
      margin: 0;  
      background-attachment: fixed;
    }

    h1 {
  margin: 50px auto 30px auto;
  font-size: 22px;           
  font-weight: 800;            
  text-transform: uppercase;    
  letter-spacing: 1px;          
  line-height: 1.3;             
  background: linear-gradient(90deg, #ff7eb3, #4facfe, #43e97b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-align: center;
  max-width: 400px;
}

    .info-box {
      max-width: 225px;
      margin: 0 auto 15px auto;
      background: rgba(255, 255, 255, 0.05);
      border-radius: 10px;
      padding: 10px;
      line-height: 1.6;
      font-size: 14px;
    }

    .container {
          position: relative;
    width: 240px;
    height: 300px;
      margin: auto;
      perspective: 1000px;
    }

    .card {
      position: absolute;
      width: 220px;
      height: 220px;
      padding: 10px;
      border-radius: 12px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.3);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: bold;
      color: white;
      transition: z-index 0s linear;
      backface-visibility: hidden;
      opacity: 0.95;
    }

    .card p {
      font-size: 13px;
      font-weight: normal;
      margin-top: 10px;
      opacity: 0.9;
    }

    .card1 { background: linear-gradient(135deg, #ff7eb3, #ff758c); }
    .card2 { background: linear-gradient(135deg, #4facfe, #00f2fe); }
    .card3 { background: linear-gradient(135deg, #a18cd1, #fbc2eb); }

    .card1 { animation: rotateCards 9s infinite; }
    .card2 { animation: rotateCards 9s infinite 3s; }
    .card3 { animation: rotateCards 9s infinite 6s; }

    @keyframes rotateCards {
      0%   { transform: rotateY(0deg) translateZ(0); z-index: 1; }
      45%  { z-index: 1; }
      50%  { transform: rotateY(180deg) translateZ(0); z-index: 3; }
      55%  { z-index: 3; }
      100% { transform: rotateY(360deg) translateZ(0); z-index: 1; }
    }