body {
    font-size: 20px;
    color: #2f3b4c;
    background-color: #e2fdc5;
    transition: 300ms all ease-out;
}

body.theme-dark {
    background-color: #1e1e1e;
    color: #28d900;
}

.theme-change-button {
    font-size: 12px;
    width: auto;
    color: initial;
    background-color: rgb(247, 255, 29);
    position: fixed;
    top: 5px;
    right: 5px;
    margin-bottom: 5px;
    padding: 5px;
    cursor: pointer;
}

body.theme-dark .theme-change-button {
    background-color: #06539c;
    color: #f3f3f3;
}