Stylesheet for the dark/light theme switcher

style.css

.switch {
    display: inline-block;
    position: relative;
    
}

.switch__input {
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    width: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
}

.switch__label {
    position: relative;
    display: inline-block;
    width: 120px;
    height: 60px;
    background-color: #2B2B2B;
    border: 5px solid #5B5B5B;
    border-radius: 9999px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.46, 0.03, 0.52, 0.96);
}

.switch__indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) translateX(-72%);
    display: block;
    width: 40px;
    height: 40px;
    background-color: #7B7B7B;
    border-radius: 9999px;
    box-shadow: 10px 0px 0 0 rgba(0, 0, 0, 0.2) inset;
}

.switch__indicator::before, .switch__indicator::after {
    position: absolute;
    content: '';
    display: block;
    background-color: #FFFFFF;
    border-radius: 9999px;
}

.switch__indicator::before {
    top: 7px;
    left: 7px;
    width: 9px;
    height: 9px;
    background-color: #FFFFFF;
    opacity: 0.6;
}

.switch__indicator::after {
    bottom: 8px;
    right: 6px;
    width: 14px;
    height: 14px;
    background-color: #FFFFFF;
    opacity: 0.8;
}

.switch__decoration {
    position: absolute;
    top: 65%;
    left: 50%;
    display: block;
    width: 5px;
    height: 5px;
    background-color: #FFFFFF;
    border-radius: 9999px;
    animation: twinkle 0.8s infinite -0.6s;
}

.switch__decoration::before, .switch__decoration::after {
    position: absolute;
    display: block;
    content: '';
    width: 5px;
    height: 5px;
    background-color: #FFFFFF;
    border-radius: 9999px;
}

.switch__decoration::before {
    top: -20px;
    left: 10px;
    opacity: 1;
    animation: twinkle 0.6s infinite;
}

.switch__decoration::after {
    top: -7px;
    left: 30px;
    animation: twinkle 0.6s infinite -0.2s;
}

@keyframes twinkle {
    50% {
        opacity: 0.2;
    }
}

.switch__indicator, .switch__indicator::before, .switch__indicator::after {
    transition: all 0.4s cubic-bezier(0.46, 0.03, 0.52, 0.96);
}

.switch__input:checked + .switch__label {
    background-color: #8FB5F5;
    border-color: #347CF8;
}

.switch__input:checked + .switch__label .switch__indicator {
    background-color: #ECD21F;
    box-shadow: none;
    transform: translate(-50%, -50%) translateX(72%);
}

.switch__input:checked + .switch__label .switch__indicator::before, .switch__input:checked + .switch__label .switch__indicator::after {
    display: none;
}

.switch__input:checked + .switch__label .switch__decoration {
    top: 50%;
    transform: translate(0%, -50%);
    animation: cloud 8s linear infinite;
    width: 20px;
    height: 20px;
}

.switch__input:checked + .switch__label .switch__decoration::before {
    width: 10px;
    height: 10px;
    top: auto;
    bottom: 0;
    left: -8px;
    animation: none;
}

.switch__input:checked + .switch__label .switch__decoration::after {
    width: 15px;
    height: 15px;
    top: auto;
    bottom: 0;
    left: 16px;
    animation: none;
}

.switch__input:checked + .switch__label .switch__decoration, .switch__input:checked + .switch__label .switch__decoration::before, .switch__input:checked + .switch__label .switch__decoration::after {
    border-radius: 9999px 9999px 0 0;
}

.switch__input:checked + .switch__label .switch__decoration::after {
    border-bottom-right-radius: 9999px;
}

@keyframes cloud {
    0% {
        transform: translate(0%, -50%);
    }
    50% {
        transform: translate(-50%, -50%);
    }
    100% {
        transform: translate(0%, -50%);
    }
}