/* https://dribbble.com/shots/6266357-Checkboxswitcher */
/* https://codepen.io/team/keyframers/pen/JVdxzz */

:root {
    --checker-duration: .4s;
}

.checker *         { position: relative; box-sizing: border-box; }
.checker *::after  { position: relative; box-sizing: border-box; }
.checker *::before { position: relative; box-sizing: border-box; }

.checker {
    display: block;
    /*font-size: 20vmin;*/
    height: 1em;
    width: 2.5em;
    box-sizing: content-box;
    padding: 0.15em;
    border-radius: 0.25em;
    -webkit-transition: -webkit-transform var(--checker-duration) ease;
    transition: -webkit-transform var(--checker-duration) ease;
    transition: transform var(--checker-duration) ease;
    transition: transform var(--checker-duration) ease, -webkit-transform var(--checker-duration) ease;
    cursor: pointer;

    position: relative;
}

.checkmark {
    width: 1em;
    height: 1em;
    -webkit-transition: -webkit-transform var(--checker-duration) ease;
    transition: -webkit-transform var(--checker-duration) ease;
    transition: transform var(--checker-duration) ease;
    transition: transform var(--checker-duration) ease, -webkit-transform var(--checker-duration) ease;
    -webkit-transform: translateX(-0.4em);
    transform: translateX(-0.4em);
    z-index: 5;
}
.checkmark svg {
    display: block;
    background: #e5e5e5;
    -webkit-transform: translateX(0.4em);
    transform: translateX(0.4em);
    border-radius: 0.15em;
    -webkit-transition: background-color var(--checker-duration) ease, -webkit-transform calc(var(--checker-duration) * 1.5) ease;
    transition: background-color var(--checker-duration) ease, -webkit-transform calc(var(--checker-duration) * 1.5) ease;
    transition: background-color var(--checker-duration) ease, transform calc(var(--checker-duration) * 1.5) ease;
    transition: background-color var(--checker-duration) ease, transform calc(var(--checker-duration) * 1.5) ease, -webkit-transform calc(var(--checker-duration) * 1.5) ease;
}
.checkmark svg path {
    stroke-dasharray: 90;
    stroke-dashoffset: 90;
    -webkit-transition: stroke-dashoffset calc(var(--checker-duration) / 3) linear calc(var(--checker-duration) / 3);
    transition: stroke-dashoffset calc(var(--checker-duration) / 3) linear calc(var(--checker-duration) / 3);
}

.checkbox {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0.4;
    visibility: hidden;
}
.checkbox:checked ~ .checkmark {
    -webkit-transform: translate(1.9em);
    transform: translate(1.9em);
}
.checkbox:checked ~ .checkmark svg {
    background: #77c44c;
    -webkit-transform: translate(-0.4em);
    transform: translate(-0.4em);
}
.checkbox:checked ~ .checkmark svg path {
    stroke-dashoffset: 0;
}

.check-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: inherit;
    background: white;
    z-index: 2;
}
.check-bg:before, .check-bg:after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    border-radius: inherit;
}
.check-bg:after {
    background: white;
}
.check-bg:before {
    -webkit-transition: -webkit-transform var(--checker-duration) ease;
    transition: -webkit-transform var(--checker-duration) ease;
    transition: transform var(--checker-duration) ease;
    transition: transform var(--checker-duration) ease, -webkit-transform var(--checker-duration) ease;
    -webkit-transform: translateY(30%);
    transform: translateY(30%);
    -webkit-transform-origin: bottom center;
    transform-origin: bottom center;
    background: black;
    -webkit-filter: blur(0.25em);
    filter: blur(0.25em);
    opacity: 0.1;
    z-index: -1;
}

.checker.checker:active {
    -webkit-transform: scale(0.85);
    transform: scale(0.85);
    -webkit-transition-duration: calc(var(--checker-duration) / 2);
    transition-duration: calc(var(--checker-duration) / 2);
}
.checker.checker:active .check-bg::before {
    -webkit-transform: translateY(0) scale(0.8);
    transform: translateY(0) scale(0.8);
    opacity: 0.2;
}