.page-transition {
    position: fixed;
    z-index: 1000;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    opacity: 0;
}

.page-transition::before {
    position: absolute;
    inset: -20%;
    background: var(--leaf);
    content: "";
    clip-path: ellipse(0% 0% at 50% 100%);
    transition: clip-path 650ms cubic-bezier(0.72, 0, 0.22, 1);
}

.transition-butterfly {
    position: absolute;
    z-index: 1;
    top: 50%;
    left: 50%;
    width: clamp(90px, 18vw, 170px);
    height: auto;
    opacity: 0;
    transform: translate(-50%, 80px) rotate(-12deg) scale(0.35);
    transition: opacity 180ms ease 130ms, transform 700ms cubic-bezier(0.22, 1, 0.36, 1) 130ms;
}

body>.site-header,
body>.project-header,
body>main,
body>footer {
    animation: page-arrive 700ms ease both;
}

body.is-page-leaving>*:not(.page-transition) {
    animation: page-leave 620ms cubic-bezier(0.65, 0, 0.35, 1) both;
}

body.is-page-leaving .page-transition {
    opacity: 1;
}

body.is-page-leaving .page-transition::before {
    clip-path: ellipse(100% 110% at 50% 50%);
}

body.is-page-leaving .transition-butterfly {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(8deg) scale(1);
}

@keyframes page-arrive {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes page-leave {
    from {
        opacity: 1;
        transform: translateY(0);
    }

    to {
        opacity: 0;
        transform: translateY(-10px);
    }
}

@media (prefers-reduced-motion: reduce) {

    body>.site-header,
    body>.project-header,
    body>main,
    body>footer {
        animation: none;
    }

    body.is-page-leaving>*:not(.page-transition) {
        animation: none;
    }

    .page-transition {
        display: none;
    }
}