body {
    display: flex;
    justify-content: center;
    align-items: center;

    position: absolute;
    top: 0;
    left: 0;

    height: 100%;
    width: 100%;

    margin: 0;
    padding: 0;
}

.loader {
    width: 48px;
    height: 48px;
    border: 5px solid #FF7500;
    border-bottom-color: transparent;
    border-radius: 50%;
    display: inline-block;
    box-sizing: border-box;
    animation: rotation 1s linear infinite;
}

@keyframes rotation {
    0% {
        transform: rotate(0deg);
    }

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