html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  background-image: url('img/bj3.jpg');
  background-size: cover;
  background-position: center;
  font-family: Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

.form-container {
  position: absolute;
  bottom: 20px;
  width: 80%;
  left: 10%;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

input[type="text"] {
  border: 2px solid #cceaff;
  border-radius: 10px;
  padding: 12px;
  font-size: 16px;
  width: 100%;
  box-sizing: border-box;
  outline: none;
  transition: border-color 0.3s, box-shadow 0.3s;
  background-color: #f9fcff;
  color: #333;
}

input[type="text"]:focus {
  border-color: #66ccff;
  box-shadow: 0 0 5px rgba(102, 204, 255, 0.6);
  background-color: #ffffff;
}

.continue-btn {
  margin-top: 20px;
  width: 100%;
  height: 50px;
  font-size: 16px;
  background-color: #66ccff;
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.continue-btn:hover {
  background-color: #33bbee;
}

.spinner {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 50px;
  height: 50px;
  border: 5px solid rgba(0, 0, 255, 0.3);
  border-top-color: blue;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  display: none;
  z-index: 1000;
}

@keyframes spin {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

#loading-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  z-index: 999;
  display: none;
  justify-content: center;
  align-items: center;
  color: white;
  font-size: 18px;
  text-align: center;
}

#success-overlay {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(0, 0, 0, 0.85);
  color: white;
  padding: 20px;
  border-radius: 12px;
  font-size: 18px;
  text-align: center;
  z-index: 1001;
  display: none;
  width: 600px;
  max-width: 90%;
}