body {
      background: #001027;
      font-family: 'Consolas', monospace;
      color: #00aaff;
    }
    .crypto-card {
      background: #002550;
      border-radius: 15px;
      padding: 2rem;
      max-width: 420px;
      margin: auto;
      box-shadow: 0 0 25px #00aaffcc;
      border: 1.5px solid #00aaff;
    }
    .crypto-input {
      background: #003069;
      border: 1.5px solid #00aaff;
      color: #00aaff;
      font-family: monospace;
      border-radius: 10px;
    }
    .crypto-input:focus {
      border-color: #33c3ff;
      box-shadow: 0 0 18px #33c3ff;
      background: #004c8c;
      color: #d0f0ff;
    }
    .btn-blue {
      background-color: transparent;
      border: 2px solid #00aaff;
      color: #00aaff;
      font-weight: 700;
      text-transform: uppercase;
      box-shadow: 0 0 25px #00aaff;
      transition: 0.3s ease;
      letter-spacing: 2px;
      width: 100%;
      padding: 12px 0;
      border-radius: 10px;
    }
    .btn-blue:hover {
      background-color: #00aaff;
      color: #001027;
      box-shadow: 0 0 45px #00aaffcc;
    }
    a {
      color: #00aaff;
      text-decoration: none;
    }
    a:hover {
      color: #33c3ff;
    }