body {
    margin: 0;
}

.loader-main {
    position: fixed;  z-index: 9999999;  width: 100%;  height: 100%;  background-color: #f5f7fa;
}

.loader {
    position: absolute;  top: calc(50% - 25px);  left: calc(50% - 25px);  width: 50px;  padding: 6px;  animation: l3 1s infinite linear;  border-radius: 50%;  background: #1677ff;  aspect-ratio: 1;  --_m: conic-gradient(#0000 10%, #1677ff),
    linear-gradient(#1677ff 0 0) content-box;  -webkit-mask: var(--_m);                  mask: var(--_m);  -webkit-mask-composite: source-out;                  mask-composite: subtract;
}

@keyframes l3 {
    to {
        transform: rotate(1turn);
    }
}