.intro {
    height: 95vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

video {
    position: absolute;
    height: 100%;
    width: 100%;
    object-fit: cover;
    z-index: -1;
}

.inactive {
    filter: blur(1px) brightness(0.9);
    transition: filter 1.5s ease-out;
}

.intro h1 {
    width: 100%;
    position: fixed;
    top: 23%;
    color: var(--neutral-100);
    font-size: var(--fs-title);
    font-weight: 600;
    font-style: italic;
    font-family: 'Fira Sans', sans-serif;
    line-height: 1.3;
    text-align: center;
    text-shadow: var(--neutral-cool-dark) 0.02em 0.02em 0.02em;
    mix-blend-mode: luminosity;
}

.intro h1 .grey {
    color: var(--neutral-200);
}

.intro-logo {
    position: fixed;
    top: 15%;
    left: 50%;
    transform: translateX(-50%);
    width: min(14rem, 80vw);
    height: auto;
    filter: drop-shadow(0.03rem 0.03rem 0.03rem var(--neutral-cool-dark));
    z-index: 1;
}

.intro-divider {
    position: fixed;
    top: 22%;
    left: 50%;
    transform: translateX(-50%);
    width: min(5rem, 25vw);
    border: none;
    border-top: 0.13rem solid var(--primary);
    opacity: 0.7;
    z-index: 1;
}

button#play, button#pause, .play, .pause {
    width: 5rem;
    position: absolute;
    right: 5%;
    bottom: 5%;
    background-color: transparent;
    border: none;
}

button#play, button#pause, .play:hover, .pause:hover {
    cursor: pointer;
}

#playButton circle, #pauseButton circle {
    fill: var(--neutral-200);
    stroke: var(--neutral-200);
    stroke-miterlimit: 10;
    stroke-width: 12px;
}

#playButton:hover circle, #pauseButton:hover circle {
    fill: var(--neutral-cool-dark);
    stroke: none;
    transition: fill .05s ease-out;
}

#playButton polygon, #pauseButton rect {
    stroke: var(--secondary);
    fill: var(--secondary);
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 12px
}

#playButton:hover polygon, #pauseButton:hover rect {
    stroke: var(--neutral-200);
    fill: var(--neutral-200);
    transition: fill .05s ease-out;
}

section {
    margin: max(8rem, 10vw) auto;
}

section#raw-materials, section#factories {
    /*width: max(56rem, 76%);*/
    display: flex;
    /*gap: 4rem;*/
    flex-direction: column;
    justify-content: center;
}

section#milestones {
    width: unset;
}

.box {
    flex: 1;
    justify-content: flex-start;
    align-items: center;
}

.invisible {
    opacity: 0;
    pointer-events: none;
    filter: blur(0.05rem);
    transform: translate(0, 1rem);
    transition: opacity .3s ease-out, filter .3s ease-out, transform .5s ease-out;
}

.visible {
    opacity: 1;
    filter: blur(0);
    transition: opacity .3s ease-out, filter .3s ease-out, transform .5s ease-out;
}

.intro-logo.invisible,
.intro-divider.invisible {
    transform: translate(-50%, 1rem);
}

.intro-logo.visible,
.intro-divider.visible {
    transform: translate(-50%, 0);
}

#raw-materials p {
    margin: 1rem 1rem 2.7rem 1rem;
    color: var(--primary);
    font-size: 1.3rem;
    text-align: left;
    line-height: 1.5;
}

section h1 {
    text-align: center;
    font-size: var(--fs-title);
    letter-spacing: -0.02em;
    color: var(--neutral-cool-dark);
}

section h2 {
    width: 81%;
    margin: 0.7em auto;
    text-align: left;
    font-size: var(--fs-h1);
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--secondary);
}

.section-title {
    display: flex;
    align-items: stretch;
    margin: 2rem auto;
    width: min(85%, 24rem);
}

.section-title > .deco-symbol {
    font-size: 7rem;
    font-family: "DIN Alternate", Optima, Impact, sans-serif;
    color: var(--neutral-200);
    margin-right: 1.2rem;
}

/*.section-title > .deco-symbol::before {*/
/*    content: "❝";*/
/*    position: relative;*/
/*    top: 0.2rem;*/
/*}*/

.section-title > h2 {
    margin: 0 0 0 2rem;
    align-self: center;
    font-size: var(--fs-h2);
    font-weight: 500;
    line-height: 1.3;
    color: var(--neutral-cool-dark);
    position: relative;
}

.section-title > h2::before {
    content: "";
    position: absolute;
    left: -2rem;
    top: 2%;
    height: 100%;
    width: 0.4rem;
    border-radius: 0.1rem;
    background-color: var(--primary);
    z-index: -1;
}

.series {
    display: flex;
    gap: 1.2rem;
    margin: 2rem auto 1rem auto;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
}

.series > .pic-text-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.series > .pic-text-group > .pic {
    height: 11rem;
    width: 11rem;
    margin-bottom: 1rem;
    border: 0.1rem solid var(--neutral-200);
    border-radius: .8rem;
    background-size: cover;
}

.series button {
    width: 11rem;
    height: 3rem;
    background-color: var(--neutral-100);
    border: 0.1rem solid var(--neutral-200);
    border-radius: 2rem;
    padding: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
}

.series button:hover,
.series button.active {
    background-color: var(--primary);
    box-shadow: 0 0 0.5rem -0.1rem var(--neutral-cool-dark);
    transition: background-color .1s ease-out, box-shadow 0.2s ease-out;
}

.series button span {
    padding: 0;
    margin: 0;
    flex: 1;
    text-align: center;
    font-size: 1rem;
    font-weight: 500;
    color: var(--neutral-500);
    white-space: nowrap;
}


.series button:hover span,
.series button.active span {
    color: white;
    transition: color 0.2s ease-out;
}

.material-milestone {
    margin: auto;
    width: min(100%, 35rem);
    border: 0.1rem solid var(--neutral-200);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: inset 0 0 0.5rem -0.2rem var(--neutral-200);
    background-color: var(--background-warm);
    max-height: 100rem;
    overflow: hidden;
    opacity: 1;
    transition: max-height 0.5s ease, opacity 0.4s ease, margin 0.4s ease, padding 0.4s ease;
}

.folded {
    max-height: 0 !important;
    opacity: 0 !important;
    padding: 0 2rem !important;
    margin: 0 auto !important;
    border-color: transparent !important;
}

.material-milestone .milestone-row {
    display: grid;
    grid-template-columns: 1fr 4fr;
    gap: 1rem;
    margin: 1rem 1rem 2.7rem 1rem;
}

.material-milestone hr {
    border: none;
    border-bottom: 0.2rem solid var(--neutral-200);
    margin: 2rem auto -.2rem 1rem;
    width: 10%;
}

.material-milestone .year {
    font-size: var(--fs-h3);
    font-weight: 600;
    color: var(--neutral-cool-dark);
    text-align: left;
    width: 4ch;
    margin-top: -.4rem;
    display: inline-block;
}

.material-milestone .event {
    font-size: var(--fs-primary);
    color: var(--secondary);
    text-align: left;
    line-height: 1.4;
    padding-top: 0.2rem;
    display: inline-block;
}

.nowrap {
    white-space: nowrap;
}

.overview {
    height: 95vh;
    overflow: clip;
    background-attachment: fixed;
    background-size: cover;
    background-position: center;
    position: relative;
    outline: 0.5rem solid var(--neutral-200);
}

.placeholder {
    height: calc(95vh - 7.2rem);
    background: rgba(0, 0, 0, 0);
}

.glass-backdrop {
    position: sticky;
    left: 4rem;
    bottom: 2rem;
    margin: 2rem 0;
    width: min(80%, 23rem);
    padding: 1rem 1rem 1rem 2rem;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 0.3rem;
    backdrop-filter: blur(1px) saturate(0.5);
}

.glass-backdrop h3, .glass-backdrop p {
    position: relative;
    z-index: 1;
    margin: 0.5rem;
}

.glass-backdrop h3 {
    color: var(--neutral-100);
    font-size: var(--fs-h3);
}

.glass-backdrop h3::before {
    content: "";
    position: absolute;
    left: -2.5rem;
    top: .5rem;
    height: 2rem;
    width: .4rem;
    background-color: var(--accent);
}

.glass-backdrop p {
    color: var(--neutral-200);
    font-size: var(--fs-primary);
}

h2.plain-title {
    margin: 2rem auto;
    text-align: center;
    color: var(--primary);
    font-size: var(--fs-h2);
    font-weight: var(--fw-strong);
}

h2.plain-title::after {
    content: "";
    display: block;
    margin: 1rem auto 0 auto;
    width: 4rem;
    border: none;
    border-top: 0.13rem solid var(--neutral-200);
}

section > p {
    width: 60%;
    margin: .3rem auto;
    color: var(--neutral-600);
    font-size: var(--fs-text);
    font-weight: var(--fw-regular);
    text-align: center;
    line-height: var(--lh-text);
}

.quality-detail {
    display: flex;
    gap: 3rem;
    margin: 1rem auto;
    padding: 3rem 0;
    background-color: var(--background-warm);
    box-shadow: inset 0 0 1rem -0.5rem var(--neutral-400);
    justify-content: center;
    max-height: 1000px;
    overflow: hidden;
    opacity: 1;
    transition: max-height 0.5s ease, opacity 0.4s ease, margin 0.4s ease, padding 0.4s ease;
}

.quality-detail img, .quality-detail div {
    width: min(28rem, 38%);
}

.quality-detail img {
    height: auto;
    object-fit: cover;
    border-radius: 1rem;
}

.quality-detail div {
    padding-left: 2rem;
}

.quality-detail div p {
    color: var(--secondary);
    font-size: var(--fs-text);
    font-weight: var(--fw-regular);
    line-height: var(--lh-text);
    text-align: left;
}

.quality-detail div h3 {
    font-size: var(--fs-h3);
    font-weight: var(--fw-strong);
    color: var(--primary);
}

.quality-detail li {
    color: var(--secondary);
    padding-left: .3rem;
    margin-bottom: .7rem;
}

.quality-detail li::marker {
    color: var(--primary);
    content: "✓ ";
    font-size: 1.1em;
}

#milestones {
    position: relative;
}

#milestones ul {
    display: flex;
    flex-direction: row;
    overflow-x: auto;
    box-shadow: inset 0 0 0.5rem var(--neutral-200);
    padding: 2rem;
}

#milestones li {
    flex: 1;
    margin: 0 1rem;
    min-width: 15rem;
    max-width: 15rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    text-align: center;
}


#milestones li span {
    font-weight: 600;
    font-size: var(--fs-h2);
    color: var(--neutral-cool-dark);
    display: block;
    text-align: center;
    margin: 0.5rem;
}

#milestones li p {
    color: var(--secondary);
    text-indent: initial;
    text-align: center;
}

#milestones .arrow.left {
    position: absolute;
    left: 5vw;
    top: 2rem;
}

#milestones .arrow.right {
    position: absolute;
    right: 5vw;
    left: auto;
    top: 2rem;
}

footer {
    margin: 8rem auto;
}

@media screen and (max-width: 1024px) {
    .intro h1 {
        font-size: min(10vw, var(--fs-h1));
    }

    section {
        margin: 10rem auto;
    }

    section#raw-materials {
        /*width: 85%;*/
        margin: max(8rem, 10vw) auto;
        flex-direction: column;
    }

    /*section#raw-materials .box {*/
    /*    margin: 2rem auto;*/
    /*}*/
    section h1 {
        font-size: var(--fs-h1);
    }

    section h2 {
        font-size: var(--fs-h2);
    }

    section p {
        width: 100%;
        /*text-align: center;*/
        text-indent: 0;
    }

    .quality-detail {
        flex-direction: column;
    }

    .quality-detail img, .quality-detail div {
        width: min(28rem, 80%);
        margin: auto;
    }

    #milestones ul {
        flex-direction: column;
        align-items: center;
        overflow-y: auto;
        overflow-x: clip;
        box-shadow: none;
    }

    #milestones li {
        margin: 1rem 0;
        max-width: 65%;
    }

    #milestones li span {
        font-size: var(--fs-h2);
    }

    #milestones li p {
        font-size: var(--fs-text);
    }
}

@supports ( -webkit-touch-callout : none) {
    .overview {
        background-attachment: scroll;
    }
}