html.is-intro .site-header {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
html.is-intro,
html.is-intro body { overflow: hidden; }

.org {
    position: relative;
    height: 640vh;
    background: #000;
}
.org__sticky {
    position: sticky;
    top: 0;
    height: 100svh;
    overflow: hidden;
    background: #000;
}
.org__world {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    z-index: 1;
}
.org__source {
    position: absolute;
    width: 320px;
    height: 180px;
    left: 0;
    top: 0;
    opacity: 0.02;
    pointer-events: none;
    z-index: 0;
}
.org__copy {
    position: absolute;
    inset: 0;
    z-index: 4;
    pointer-events: none;
}
.org__copy p {
    position: absolute;
    left: 50%;
    top: 46%;
    margin: 0;
    color: #f4f1ea;
    font-weight: 500;
    font-size: clamp(2.8rem, 7.2vw, 7.4rem);
    letter-spacing: -0.065em;
    line-height: 0.86;
    white-space: nowrap;
    transform-origin: center center;
    opacity: 1;
    visibility: hidden;
}
.org__copy p[data-line="next"] { top: 58%; }
.org__mark {
    position: absolute;
    left: 50%;
    top: 46%;
    z-index: 6;
    width: min(32vw, 380px);
    height: auto;
    transform: translate3d(-50%, -50%, 0);
    visibility: hidden;
    pointer-events: none;
}
.org__fallback {
    position: absolute;
    left: 50%;
    top: 46%;
    z-index: 5;
    margin: 0;
    transform: translate3d(-50%, -50%, 0);
    color: #f4f1ea;
    letter-spacing: 0.18em;
    font-size: 1.4rem;
}

.idx-nav {
    position: fixed;
    inset: 0;
    z-index: 70;
    overflow: hidden;
    pointer-events: none;
    background: transparent;
}
.idx-nav[hidden] { display: none; }
html.nav-open .idx-nav { pointer-events: auto; }
.idx-nav__world {
    position: absolute;
    inset: 0;
    perspective: 1280px;
    perspective-origin: 50% 44%;
}
.idx-nav a {
    position: absolute;
    top: 22vh;
    left: 50%;
    width: max-content;
    max-width: 42vw;
    height: auto;
    margin: 0;
    display: block;
    overflow: visible;
    background: transparent;
    color: #f4f4f2;
    text-decoration: none;
    transform-style: preserve-3d;
    outline: none;
}
.idx-nav a span {
    position: relative;
    z-index: 2;
    display: block;
    font-weight: 500;
    font-size: clamp(2.2rem, 4.2vw, 4.8rem);
    letter-spacing: -0.06em;
    line-height: 0.86;
    white-space: nowrap;
}
.idx-nav a:focus-visible span {
    outline: 1px solid rgba(244, 244, 242, 0.85);
    outline-offset: 8px;
}
html.nav-open main,
html.nav-open .site-footer {
    transform: scale(0.9) translate3d(0, -1vh, 0);
    filter: brightness(0.72) saturate(0.95);
    transform-origin: 50% 40%;
}
main,
.site-footer {
    transition: transform 0.85s cubic-bezier(.16, 1, .3, 1), filter 0.85s cubic-bezier(.16, 1, .3, 1);
}
body.nav-open { overflow: visible; }
.site-header { z-index: 90; }

@media (max-width: 899px) {
    .org { height: 520vh; }
    .org__mark { width: min(72vw, 320px); }
    .org__copy p {
        font-size: clamp(1.65rem, 8.2vw, 2.45rem);
        white-space: nowrap;
    }
    .idx-nav a {
        top: 22vh;
        width: max-content;
        max-width: 86vw;
        height: auto;
        margin: 0;
    }
    .idx-nav a span { font-size: clamp(1.4rem, 6vw, 2rem); }
}

@media (prefers-reduced-motion: reduce) {
    .org { height: auto; }
    .org__sticky { position: relative; height: 100svh; }
    .org__world,
    .org__source,
    .org__copy { display: none; }
    .org__mark { visibility: visible; width: min(64vw, 420px); }
    .idx-nav__world {
        perspective: none;
        left: 6vw;
        right: 6vw;
        top: 16vh;
        display: flex;
        flex-direction: column;
        gap: 1.2rem;
    }
    .idx-nav a {
        position: relative;
        left: auto;
        top: auto;
        width: auto;
        height: auto;
        margin: 0;
    }
    .idx-nav a span,
    .idx-nav a img { transform: none; }
    main,
    .site-footer { transition: none; }
    html.nav-open main,
    html.nav-open .site-footer { transform: none; filter: brightness(0.3); }
}