* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    clear: both;
}

#loading-container {
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.loader {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: inline-block;
    position: relative;
    border: 2px solid;
    border-color: #287DFA #287DFA #287DFA transparent;
    box-sizing: border-box;
    animation: rotation 1s linear infinite;
}

.loader::after {
    content: '';
    box-sizing: border-box;
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    margin: auto;
    border: 2px solid;
    border-color: transparent transparent #287DFA #287DFA;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    animation: rotationBack 0.5s linear infinite;
    transform-origin: center center;
}

@keyframes rotation {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

@keyframes rotationBack {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(-360deg);
    }
}