body {
    background: url('image/icon/Chance@4x.png') no-repeat center center fixed;
    background-size: cover;
    font-family: "Segoe UI", sans-serif;
    color: #222;
    line-height: 1.6;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
  }

  .signup-container {
    background: rgba(255, 255, 255, 0.9);
    padding: 40px 30px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    width: 100%;
    max-width: 200px;
    text-align: center;
  }
  .signup-container {
    background: rgba(255, 255, 255, 0.95);
    padding: 40px 30px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-radius: 16px;
    width: 100%;
    max-width: 400px; /* ปรับจาก 200px */
    text-align: center;
  }