.preloader-wrap { top: 0; left: 0; width: 100%; height: 100%; z-index: 1000; display: flex; align-items: center; justify-content: center; } .preloader-wrap-center { display: flex; justify-content: center; align-items: center; height: 100%; } .preloader { position: relative; width: 30px; height: 30px; border-radius: 50%; border: 6px solid #f3f3f3; border-top: 6px solid #3498db; animation: spin 1s linear infinite; transform: translate(-50%, -50%); } @keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }