#switch {
    position: relative;
    width: 100px;
    height: 50px;
    border-radius: 50px;
    box-shadow: 1px 2px 6px rgba(0,0,0,0.3);
    cursor: pointer;
}

.checkbox {
    position: absolute;
    inset: 0;
    opacity: 0;
    z-index: 2;
}

#switch .icon {
    position: absolute;
    top: 5px;
    left: 5px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #fdb7135e;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: all 0.4s ease;
}

#switch .icon::before { content: '☀️'; }

#switch.winter .icon {
    left: 55px;
    background: #e6f0ff;
}

#switch.winter .icon::before { content: '❄️'; }