*,
::before,
::after {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: sans-serif;
    text-align: center;
}
:root {
    font-size: calc(0.8em + 1vw);
    background: black;
    --border: #fff;
}
body {
    height: 100vh;
    display: grid;
    justify-items: center;
    align-items: center;
}
button {
    font-size: 1rem;
    padding: 1rem 2rem;
    border: 2px solid currentColor;
    background: transparent;
    border-radius: 50px;
    color: white;
    letter-spacing: 0.05rem;
}
button:hover {
    cursor: pointer;
}
button:active {
    transform: translate(0.1rem, 0.1rem);
}
#circles {
    width: 63rem;
    height: 32rem;
    position: relative;
    overflow: hidden;
}
[class*="circle"] {
    position: absolute;
    margin: 1rem;
    border-radius: 100%;
    border: 3rem double var(--border);
}