body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f9f9f9;
}

.container {
  text-align: center;
  margin-top: 50px;
}

a {
  color: blue;
  text-decoration: underline;
  cursor: pointer;
}

.popup {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  z-index: 1000;
  justify-content: center;
  align-items: center;
}

.popup.hidden {
  display: none;
}

.popup-content {
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  width: 80%;
  max-width: 500px;
  max-height: 80%;
  overflow-y: auto;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.close-btn {
  float: right;
  font-size: 24px;
  font-weight: bold;
  cursor: pointer;
  color: #333;
}

.close-btn:hover {
  color: red;
}