* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
                   Roboto, Oxygen, Ubuntu, Cantarell, Arial;
    }

    body {
      min-height: 100vh;
      background: linear-gradient(135deg, #2563eb, #9333ea);
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 20px;
      color: #ffffff;
    }

    .card {
      width: 100%;
      max-width: 500px;
      background: rgba(0, 0, 0, 0.25);
      backdrop-filter: blur(10px);
      border-radius: 16px;
      padding: 40px 25px;
      text-align: center;
    }

    h1 {
      font-size: clamp(2rem, 5vw, 3rem);
      margin-bottom: 12px;
    }

    p {
      font-size: 1.05rem;
      line-height: 1.6;
      opacity: 0.9;
      margin-bottom: 25px;
    }

    .form {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      justify-content: center;
    }

    .form input {
      flex: 1 1 220px;
      padding: 14px;
      border-radius: 8px;
      border: none;
      outline: none;
      font-size: 1rem;
    }

    .form button {
      padding: 14px 24px;
      border-radius: 8px;
      border: none;
      font-size: 1rem;
      font-weight: 600;
      cursor: pointer;
      background: #22c55e;
      color: #000;
    }

    .form button:hover {
      background: #16a34a;
    }

    .message {
      display: none;
      margin-top: 20px;
      font-size: 1.05rem;
      line-height: 1.6;
      background: rgba(0, 0, 0, 0.3);
      padding: 20px;
      border-radius: 12px;
    }

    footer {
      margin-top: 25px;
      font-size: 0.85rem;
      opacity: 0.75;
    }