24CSSProjectsFreeCodeCamp/loadingAnimation/style.css at master · L-ux-es/24CSSProjectsFreeCodeCamp · GitHub

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:root {
    --dimension-circle: 50px;
    --light-color: rgb(224, 224, 217);
    --dark-color: rgb(167, 156, 156);
    --darker-color: rgb(100, 100, 100);
}

* {
    margin: 0;
    padding: 0;
}

.container {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.loading-animation {
    display: flex;
    flex-direction: row;
    gap: 20px;
}

.circle {
    width: var(--dimension-circle);
    height: var(--dimension-circle);
    border-radius: 50%;
    border: 1px solid black;
    animation: load 2s infinite linear alternate;
}

@keyframes load {
    0% {
        background: var(--light-color);
    }

    50% {
        background: var(--dark-color);
        scale: 90%;
    }

    100% {
        background: var(--darker-color);
        scale: 80%;
    }
}