.loader {
    width: 30px;
    height: 30px;
    border: 3px solid #1A73E8;
    border-radius: 50%;
    display: inline-block;
    box-sizing: border-box;
    position: relative;
    animation: pulse 1s linear infinite;
}

.loader:after {
    content: '';
    position: absolute;
    width: 30px;
    height: 30px;
    border: 3px solid #1A73E8;
    border-radius: 50%;
    display: inline-block;
    box-sizing: border-box;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    animation: scaleUp 1s linear infinite;
}

@keyframes scaleUp {
    0% {
        transform: translate(-50%, -50%) scale(0);
    }

    60%, 100% {
        transform: translate(-50%, -50%) scale(1);
    }
}

@keyframes pulse {
    0%, 60%, 100% {
        transform: scale(1);
    }

    80% {
        transform: scale(1.2);
    }
}