dark-mode-styling-with-sass.scss

// Mobile navigation menu and footer dark mode toggle button styling.

.rf-darkmode-toggle {
    label {
        width: 120px;
        height: 45px;
        position: relative;
        display: block;
        background-color: $color-n1;
        border-radius: 200px;
        border: 1px solid lighten($color-n4,16%);
        cursor: pointer;
        transition: 0.3s;
        
        &:after {
            content: "";
            width: 35px;
            height: 35px;
            position: absolute;
            top: 4px;
            left: 6px;
            background: $link-color;
            border-radius: 180px;
            transition: 0.3s;
        }
        
        img {
            position: absolute;
            width: 24px;
            top: 10px;
            z-index: 100;
            user-select: none;
            
            &.sun {
                left: 12px;
                filter: invert(100%);
                transition: 0.3s;
            }
            
            &.moon {
                left: 83px;
                filter: invert(61%) sepia(0%) saturate(245%) hue-rotate(135deg) brightness(93%) contrast(92%);
                transition: 0.3s;
            }
        }
    }
    
    input {
        width: 120px;
        height: 45px;
        position: absolute;
        margin: 0;
        z-index: 0;
        appearance: none;
        
        &:checked + label {
            background: transparent;
            border: 1px solid $color-n3;
        }
        
        &:checked + label:after {
            left: 112px;
            transform: translateX(-100%);
            background: $link-color;
        }
        
        &:checked + label img.sun {
            filter: invert(61%) sepia(0%) saturate(245%) hue-rotate(135deg) brightness(93%) contrast(92%);
        }
        
        &:checked + label img.moon {
            filter: invert(100%);
        }
    }   
}

// Main navigation menu dark mode toggle button positioning.

#site-header .rf-darkmode-toggle {
    position: absolute;
    top: 29px;
    right: 0px;
    transition: all 0.3s ease-in-out;
    
    @include breakpoint-900-minus {
        display: none;
    }
    
    .container {
        width: 26px;
        height: 36px;
        box-sizing: border-box;
        padding: 0;
        background: none;
        border: none;
        display: flex;
        justify-content: center;
        align-items: center;
        position: relative;
        transition: all 0.3s ease-in-out;
        
        img {
            width: 100%;
            height: 100%;
            position: absolute;
            top: 0;
            left: 0;
            opacity: 0;
                    
            &.sun {width: 26px;}
            
            &.moon {
                filter: invert(100%);
                width: 20px;
                left: 3px;
            }
            
            &.sun, &.moon {transition: all 0.3s ease-in-out;}
            
            &.visible {opacity: 1;}
        }
    }
}