.alert {
  padding: 15px;
  margin-bottom: 15px;
  border-radius: 5px;
  font-size: 16px;
  font-family: Arial, sans-serif;
  display: none;
  z-index: 999;
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
  position: fixed;
  top: 60px;
  right: 20px;
  min-width: 250px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.alert-success {
  background-color: #d4edda;
  color: #155724;
  border-left: 5px solid #155724;
}

.alert-danger {
  background-color: #f8d7da;
  color: #721c24;
  border-left: 5px solid #721c24;
}

.alert-warning {
  background-color: #fff3cd;
  color: #856404;
  border-left: 5px solid #856404;
}

.alert-info {
  background-color: #d1ecf1;
  color: #0c5460;
  border-left: 5px solid #0c5460;
}

.alert .close {
  position: absolute;
  top: -2px;
  right: 0px;
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: inherit;
}

.btn-spinner {
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-top-color: #fff;
  border-radius: 50%;
  animation: btn-spin .6s linear infinite;
  vertical-align: middle;
}

@keyframes btn-spin {
  to {
    transform: rotate(360deg);
  }
}