body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', sans-serif;
  background: #f0f4f8;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  flex-direction: column;
}

.container {
  text-align: center;
  background: white;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 8px 16px rgba(0,0,0,0.1);
}

.title {
  margin-bottom: 30px;
  color: #333;
}

form {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

input[type="text"] {
  padding: 12px;
  font-size: 16px;
  border: 1px solid #ccc;
  border-radius: 6px;
}

button {
  padding: 12px;
  font-size: 16px;
  background-color: #4CAF50;
  border: none;
  color: white;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background-color: #45a049;
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.4);
  display: flex;
  justify-content: center;
  align-items: center;
}

.modal-content {
  background: white;
  padding: 20px 30px;
  border-radius: 8px;
  text-align: center;
  font-size: 18px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.hidden {
  display: none;
}

.loading-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0,0,0,0.5);
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.loading-box {
  background: white;
  padding: 20px 30px;
  border-radius: 10px;
  font-size: 18px;
  font-weight: bold;
  box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.loading-box::after {
  content: "";
  display: block;
  margin: 10px auto 0;
  width: 24px;
  height: 24px;
  border: 3px solid #4CAF50;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/*@keyframes spin {*/
/*  to { transform: rotate(360deg); }*/
/*}*/

.loader {
  border: 16px solid #f3f3f3; /* Light grey */
  border-top: 16px solid #3498db; /* Blue */
  border-radius: 50%;
  width: 120px;
  height: 120px;
  animation: spin 2s linear infinite;
}

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