.close-button {
    position: relative;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background-color: #ccc;
    cursor: pointer;
}

    .close-button::before,
    .close-button::after {
        content: "";
        position: absolute;
        top: 50%;
        left: 50%;
        width: 60%;
        height: 2px;
        background-color: #fff;
        transform-origin: center center;
    }

    .close-button::before {
        transform: translate(-50%, -50%) rotate(45deg);
    }

    .close-button::after {
        transform: translate(-50%, -50%) rotate(-45deg);
    }