body, html {
  margin: 0;
} 

:root {
  --spinner: #f3f3f3;
  --spinner-active: purple;
}

.container {
  display: flex;
  height: 100vh;
  justify-content: center;
  align-items: center;
}

.loader {
  height: 100px;
  width: 100px;
  border-radius: 50%;
  border: 1em solid var(--spinner);
  border-top: 1em solid var(--spinner-active);
  animation: spin 1.5s linear infinite;
}

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