* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: sans-serif;
    font-size: 20px;
}

body {
    min-height: 100vh;
    overflow-x: hidden;
}

main {
    display: flex;
    flex-direction: row;
    min-height: 100vh;
}

section.light,
section.dark {
    display: flex;
    flex-direction: column;
    width: 50%;
    min-height: 100vh;
    padding: 2rem;
    align-items: center;
    justify-content: center;
    gap: 2rem;
}

section.light {
    background-color: #e0e5ec;
}

section.dark {
    background-color: #131419;
}

div.circle,
div.circle_black {
    position: relative;
    display: flex;
    width: 150px;
    height: 150px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
}

div.circle:before,
div.circle_black:before {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    display: block;
    width: 100%;
    height: 100%;
    content: " ";
    cursor: pointer;
    transition: 0.3s ease-out;
    border-radius: inherit;
    filter: blur(7px);
}

div.circle.long,
div.circle_black.long {
    width: 250px;
    height: 100px;
    border-radius: 50px;
}

div.circle:before {
    box-shadow: 8px 8px 20px #a9a8b7, -8px -8px 20px #ffffff;
}

div.circle_black:before {
    box-shadow: 8px 8px 20px rgba(0, 0, 0, 0.5),
        -8px -8px 20px rgba(255, 255, 255, 0.2);
}

div.circle:hover:before {
    box-shadow: 8px 8px 20px #a9a8b7, -8px -8px 20px #ffffff,
        inset -8px -8px 20px #ffffff, inset 8px 8px 20px #a9a8b7;
}

div.circle_black:hover:before {
    box-shadow: 8px 8px 20px rgba(0, 0, 0, 0.5),
        -8px -8px 20px rgba(255, 255, 255, 0.2), inset 8px 8px 20px rgba(0, 0, 0, 1),
        inset -8px -8px 20px rgba(255, 255, 255, 0.2);
}

div.circle:hover:before,
div.circle_black:hover:before {
    transition: 0.3s ease-in;
    transform: scale(1.05);
}

div.circle p,
div.circle_black p {
    position: relative;
    z-index: 5;
    user-select: none;
    cursor: pointer;
}

div.circle_black {
    color: white;
}

@media (max-width: 1024px) {
    * {
        font-size: 18px;
    }

    div.circle,
    div.circle_black {
        width: 130px;
        height: 130px;
    }

    div.circle.long,
    div.circle_black.long {
        width: 220px;
        height: 90px;
    }
}

@media (max-width: 768px) {
    main {
        flex-direction: column;
    }

    section.light,
    section.dark {
        width: 100%;
        min-height: 50vh;
    }
}

@media (max-width: 480px) {
    * {
        font-size: 16px;
    }

    div.circle,
    div.circle_black {
        width: 110px;
        height: 110px;
    }

    div.circle.long,
    div.circle_black.long {
        width: 190px;
        height: 80px;
    }
}

@media (max-width: 320px) {
    div.circle,
    div.circle_black {
        width: 90px;
        height: 90px;
    }

    div.circle.long,
    div.circle_black.long {
        width: 160px;
        height: 70px;
    }
}