* {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: 'Poppins', sans-serif;
      background: #0f0f0f;
      color: #fff;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      overflow: hidden;
      position: relative;
    }
    body::before {
      content: '';
      position: absolute;
      width: 200%;
      height: 200%;
      background: repeating-linear-gradient(45deg, #00ffff10 0 2px, transparent 2px 20px);
      animation: move 10s linear infinite;
      z-index: 0;
    }
    @keyframes move {
      from { transform: translate(0, 0); }
      to { transform: translate(-20px, -20px); }
    }
    form {
      background: rgba(255,255,255,0.05);
      padding: 40px;
      border-radius: 12px;
      box-shadow: 0 0 20px rgba(0,255,255,0.3);
      backdrop-filter: blur(10px);
      z-index: 1;
      width: 90%;
      max-width: 400px;
    }
    h2 {
      text-align: center;
      color: #00ffff;
      margin-bottom: 20px;
    }
    input {
      width: 100%;
      padding: 12px;
      margin: 10px 0;
      border: 1px solid #00ffff44;
      background: #111;
      color: #fff;
      border-radius: 6px;
      transition: 0.3s;
    }
    input:focus {
      outline: none;
      border-color: #00ffff;
      box-shadow: 0 0 8px #00ffff;
    }
    button {
      background: #00ffff;
      border: none;
      padding: 12px;
      width: 100%;
      border-radius: 6px;
      color: #000;
      font-weight: bold;
      font-size: 16px;
      cursor: pointer;
      margin-top: 10px;
      transition: 0.3s;
    }
    button:hover {
      background: #00cccc;
    }
    .error {
      color: #ff8a8a;
      text-align: center;
      font-size: 14px;
      margin-bottom: 10px;
    }