@betaweb/lightbox/src/style.css

A simple JavaScript class to generate images Lightbox

:root {
    --lightbox-black-rgb: 0,0,0;
    --lightbox-white-rgb: 255,255,255;
    --lightbox-black: rgb(var(--lightbox-black-rgb));
		--lightbox-white: rgb(var(--lightbox-white-rgb));
		--lightbox-nav-chevron-color: var(--lightbox-black);
}

.lightbox, .lightbox * {
    box-sizing: border-box;
}

.lightbox {
    display: flex;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    background-color: rgba(var(--lightbox-white-rgb), .8);
    opacity: 0;
    visibility: hidden;
    cursor: pointer;
    user-select: none;
}
.lightbox.visible {
    transition: opacity .3s;
    visibility: visible;
    opacity: 1;
}
.lightbox:not(.is-loading) .lightbox--inner {
    transition: width .3s, height .3s, transform .3s, opacity .3s;
    transform: scale(1);
    opacity: 1;
}

.lightbox.is-loading::before {
     position: absolute;
     content: '';
     width: 50px;
     height: 50px;
     border-radius: 50px;
     background-color: rgba(var(--lightbox-black-rgb), .5);
     box-shadow: 0 0 0 0 var(--lightbox-black);
     transform: scale(1);
     animation: pulse 2s infinite;
}

.lightbox--inner {
    position: relative;
    display: block;
    width: auto;
    height: auto;
    background-color: transparent;
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    border-radius: 10px;
    opacity: 0;
    transform: scale(1.05);
    cursor: default;
}

.lightbox--nav-prev.is-hidden,
.lightbox--nav-next.is-hidden {
    display: none;
}

.lightbox--nav-prev,
.lightbox--nav-next {
    position: fixed;
    top: 0;
    bottom: 0;
    background-color: transparent;
    width: 20%;
    z-index: 1001;
    opacity: 0;
    cursor: pointer;
		transition: opacity .3s;
}

.lightbox--nav-prev::before,
.lightbox--nav-next::before {
	position: absolute;
	content: '';
	top: calc(50% - 10px);
	transform: translate(-50%, -50%);
	border-color: var(--lightbox-nav-chevron-color);
	border-style: solid;
	border-width: 5px 5px 0 0;
	width: 20px;
	height: 20px;
	z-index: 1002;
}

.lightbox--nav-prev::after,
.lightbox--nav-next::after {
	position: absolute;
	content: '';
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	color: var(--lightbox-black);
	font-size: 3rem;
	font-weight: bold;
	background-color: rgba(var(--lightbox-white-rgb), .4);
	border-radius: 50%;
	width: 70px;
	height: 70px;
	text-align: center;
	line-height: 70px;
}

.lightbox--nav-prev {
    right: auto;
    left: 0;
}
.lightbox--nav-prev::before {
	left: calc(50% - 8px);
	transform: rotate(-135deg);
}

.lightbox--nav-next {
    right: 0;
    left: auto;
}
.lightbox--nav-next::before {
	left: calc(50% - 15px);
	transform: rotate(45deg);
}

.lightbox--nav-prev:hover,
.lightbox--nav-next:hover {
    opacity: 1;
}

.lightbox--nav-dots {
    display: flex;
    position: absolute;
    justify-content: center;
    align-items: center;
    list-style-type: none;
    margin: 0;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
}
.lightbox--nav-dots li {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: rgba(var(--lightbox-black-rgb), .2);
    margin: 0 .25rem;
    cursor: pointer;
    transform: scale(1);
    transform-origin: center;
    transition:
        transform .3s,
        background-color .3s;
}
.lightbox--nav-dots li:hover,
.lightbox--nav-dots li.active {
    transform: scale(1.6);
    background-color: rgba(var(--lightbox-black-rgb), .6);
}

.lightbox--legend {
    position: absolute;
    bottom: 2rem;
    width: 100%;
    padding: 2rem 0;
    background-color: rgba(var(--lightbox-white-rgb), .7);
    color: var(--lightbox-black-rgb);
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
}

.lightbox-link {
    cursor: pointer;
}

@keyframes pulse {
    0% {
        transform: scale(.95);
        box-shadow: 0 0 0 0 rgba(var(--lightbox-black-rgb), .7);
    }

    70% {
        transform: scale(1);
        box-shadow: 0 0 0 10px rgba(var(--lightbox-black-rgb), 0);
    }

    100% {
        transform: scale(.95);
        box-shadow: 0 0 0 0 rgba(var(--lightbox-black-rgb), 0);
    }
}