/* Icons */
.icon {
    display: block;
    width: 1.5em;
    height: 1.5em;
    margin: 0 auto;
    fill: currentColor;
    font-size: 2rem;
}

.btn {
    position: relative;
    margin: 0;
    padding: 0;
    border: 0;
    background: none;
}

.btn:focus {
    outline: none;
}

.btn:hover {
    color: #f73378;
}

.btn--nav {
    font-size: 2em;
    pointer-events: auto;
}

.nav-icon--right {
    transform: scale3d(-1, -1, 1);
}

.nav__triangle,
.nav__line {
    transition: transform 0.3s;
    fill: currentColor;
}

.btn--nav:hover .nav__triangle {
    transform: translate3d(-54px, 0, 0);
}

.btn--nav:hover .nav__line {
    transform: translate3d(17px, 0, 0);
}

.btn--info {
    margin: 0 2em 0 auto;
}

.btn--toggle.btn--active {
    z-index: 100;
    color: #fff;
}

.btn--toggle.btn--active:hover {
    color: #f73378;
}

.btn--toggle .icon:nth-child(2),
.btn--toggle.btn--active .icon:first-child {
    display: none;
}

.btn--toggle.btn--active .icon:nth-child(2) {
    display: block;
}

.js main {
    grid-template-areas: "... title title menu ..." "content content content content content" "footer footer footer footer footer";
}

.content--exhibitions {
    display: grid;
    grid-area: content;
    grid-template-columns: 100vw;
    margin-top: 0 !important;
}

/* two seats on each side for free space */

.container {
    position: relative;
    overflow: visible;
    width: 100vw;
    height: 85vh;
    min-height: 550px;
    perspective: 2250px;
}

.scroller {
    height: 100%;
    transform-style: preserve-3d;
}

.room {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100vw;
    height: 85vh;
    margin: -50vh 0 0 -50vw;
    pointer-events: none;
    opacity: 0;
    transform-style: preserve-3d;
}

.room--current {
    pointer-events: auto;
    opacity: 1;
}

.room__side {
    position: absolute;
    display: flex;
    justify-content: center;
    align-items: center;
    transform-style: preserve-3d;
}

.room__side--left,
.room__side--right {
    width: 4000px; /* depth */
    height: 85vh;
    background: #dbdbdb;
}

.room__side--back {
    width: 100vw;
    height: 85vh;
    background: #e9e9e9;
    box-shadow: 0 0 0 2px #e9e9e9;
    transform: translate3d(0, 0, -4000px) rotate3d(1, 0, 0, 0.1deg) rotate3d(1, 0, 0, 0deg);
    /* Rotation due to rendering bug in Chrome when loader slides up (images seem cut off) */
}

.room__side--right {
    right: 0;
    justify-content: flex-end;
    transform: rotate3d(0, 1, 0, -90.03deg);
    transform-origin: 100% 50%;
}

.room__side--left {
    justify-content: flex-start;
    transform: rotate3d(0, 1, 0, 90deg);
    transform-origin: 0 50%;
}

.room__side--bottom {
    width: 100vw; /* depth */
    height: 4000px;
    background: #d0d0d0;
    transform: rotate3d(1, 0, 0, 90deg) translate3d(0, -4000px, 0);
    transform-origin: 50% 0%;
}

.room__side--bottom {
    top: 100%;
}

/* Inner elements */
.room__img {
    flex: none;
    max-width: 40%;
    max-height: 60%;
    margin: 0 5%;
    transform: translate3d(0, 0, 10px);
    backface-visibility: hidden;
}

/* Content */
.content-container {
    position: absolute;
    top: 0;
    left: 0;
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 85vh;
    padding: 2vw;
}

/* Header */
.exhibitions-header {
    display: flex;
    align-items: center;
}

.exhibitions-header__title {
    font-size: 1.165em;
    font-weight: normal;
    margin: 0.5em 0 0 0;
}

/* Top Navigation Style */
.subject {
    font-size: 1.5em;
    margin: 0 auto;
    color: #f73378;
}

/* Location */
.location {
    font-size: 1.75rem;
    font-weight: normal;
    position: absolute;
    top: 0;
    right: 0;
    height: 100%;
    margin: 0 2.8em;
    padding: 6em 0;
    text-align: center;
    pointer-events: none;
    color: #f73378;
    -webkit-writing-mode: vertical-rl;
    writing-mode: vertical-rl;
}

/* Slides */
.slides {
    position: relative;
    flex: 1;
}

.slide {
    position: absolute;
    left: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: 70vw;
    height: 100%;
    margin: 15vh 0 0 10vw;
    pointer-events: none;
    opacity: 0;
}

.slide--current {
    pointer-events: auto;
    opacity: 1;
}

.slide__name {
    font-size: 7rem;
    line-height: 0.8;
    margin: 0;
    padding: 0 0 0 5vw;
    text-indent: -5vw;
    letter-spacing: -0.05em;
    text-transform: lowercase;
    color: #f73378;
}

.slide__title,
.slide__date {
    text-align: right;
}

.slide__title {
    font-size: 3.5rem;
    font-weight: normal;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    margin: 0.75em 0 0 0;
    color: #000;
}

.slide__date {
    font-size: 1.75rem;
    font-weight: bold;
    margin: 1.15em 0 0 0;
    text-transform: uppercase;
    color: #f73378;
}

.slide__number {
    font-size: 0.4em;
    display: inline-block;
    margin: 0.5em 0 0 0;
    padding: 0.4em 0.5em 0.4em 0.5em;
    color: #fff;
    background: #f73378;
}

/* Nav */
.nav {
    display: flex;
    justify-content: space-between;
    width: 100%;
    margin: auto 0 0 0;
    pointer-events: none;
}

/* Overlay with menu */
.overlay {
    position: fixed;
    z-index: 10;
    top: 0;
    left: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0;
}

.overlay--loader {
    z-index: 1000;
    background: #fff;
}

.overlay--info {
    background: rgba(23, 94, 236, 0.4);
}

.overlay--menu {
    background: rgba(255, 25, 25, 0.66);
}

.js .overlay--active {
    pointer-events: auto;
    opacity: 1;
}

.meta-menu {
    margin: 0;
    padding: 0;
    list-style: none;
}

.meta-menu__item {
    font-size: 7vh;
    margin: 0.25em 0;
    padding: 0;
    text-transform: lowercase;
}

.meta-menu__item--current {
    font-weight: bold;
}

.meta-menu__link {
    color: #fff;
}

.meta-menu__link:focus,
.meta-menu__link:hover {
    color: #1f1f21;
}

.info {
    color: #fff;
    font-size: 2.5em;
    line-height: 1.4;
    width: 60vw;
    min-width: calc(320px - 2em);
    max-width: 900px;
    margin: 0;
    padding: 1em;
    font-weight: 600;
}

.loader {
    display: flex;
}

.loader div {
    width: 30px;
    height: 30px;
    margin: -30px 0.2em 0;
    border: 4px solid;
    background: #e9e9e9;
    animation: anim-loader 0.8s alternate infinite forwards;
    animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
}

.loader div:nth-child(2) {
    border-radius: 50%;
    background: #f73378;
    animation-delay: 0.15s;
}

.loader div:nth-child(3) {
    animation-delay: 0.3s;
}

@keyframes anim-loader {
    100% {
        transform: translate3d(0, 30px, 0) scale3d(0.9, 0.9, 1);
    }
}

@media screen and (max-width: 50em) {
    .subject {
        display: none;
    }

    .exhibitions-links {
        margin: 0 0.5em 0 0;
    }

    .btn--info {
        margin-right: 1.25em;
    }

    .location {
        font-size: 0.85em;
        position: relative;
        height: auto;
        margin: 1em 0 0 0;
        padding: 0;
        text-align: left;
        -webkit-writing-mode: horizontal-tb;
        writing-mode: horizontal-tb;
    }

    .slide {
        width: 100%;
        margin: 7vh 0 0 0;
    }

    .slide__name {
        padding: 0 0 0 12vw;
    }

    .slide__title {
        font-size: 1.5em;
    }

    .slide__date {
        font-size: 0.65em;
    }

    .nav {
        position: absolute;
        top: 7em;
        left: 0;
        width: 100%;
        padding: 1em;
    }

    .nav__triangle {
        transform: translate3d(-54px, 0, 0);
    }

    .nav__line {
        transform: translate3d(17px, 0, 0);
    }

    .btn--nav:hover {
        color: currentColor;
    }

    .info {
        font-size: 0.95em;
        width: 100vw;
    }
}

main .footer {
    margin-top: 0;
}

@media screen and (min-width: 60em) {
    .js main {
        grid-template-rows: auto auto auto;
        grid-template-areas: "title title menu" "content content content" "footer footer footer";
    }
}

@media screen and (min-width: 120em) {
    .js main {
        grid-template-areas: "... title title menu ..." "content content content content content" "footer footer footer footer footer";
    }
}