body {
      font-family: system-ui, sans-serif;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      min-height: 100vh;
      margin: 0;
      background: #f0f4f0;
      color: #222;
      transition: background 0.5s, color 0.5s;
    }
    .card {
      text-align: center;
      background: white;
      padding: 2rem 3rem;
      border-radius: 1.5rem;
      box-shadow: 0 4px 20px rgba(0,0,0,0.1);
      transition: background 0.5s, box-shadow 0.5s;
    }
    h1 {
      font-size: 1.8rem;
      margin-bottom: 0.5rem;
    }
    .emoji {
      font-size: 5rem;
      margin: 1rem 0;
      transition: transform 0.3s;
    }
    .emoji.animate {
      transform: scale(1.2);
    }
    .value {
      font-size: 3rem;
      font-weight: bold;
    }
    .status {
      margin-top: 0.5rem;
      font-size: 1.2rem;
      opacity: 0.8;
    }