* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
    user-select: none;
}

body {
    display: flex;
    flex-direction: row;
    margin: 0;
    text-align: center;
    background-color: rgb(43, 43, 43);
    color: #fff;
    font-family: sans-serif;
}

.loader {
    --border-width: 6px;

    position: relative;
    display: inline-block;
    width: 48px;
    height: 48px;
    border-width: var(--border-width);
    border-style: solid;
    border-color: #fff4;
    border-radius: 100%;
}

.loader::before {
    content: "";
    box-sizing: border-box;
    display: block;
    height: calc(100% + 2 * var(--border-width));
    margin: calc(var(--border-width) * -1);
    border-width: var(--border-width);
    border-style: inherit;
    border-color: transparent;
    border-left-color: #fff;
    border-radius: inherit;
    animation: 1s linear spin infinite;
}

@keyframes spin {
    from {
        transform: rotate(0);
    }
    to {
        transform: rotate(360deg);
    }
}