/* intro v28 — Arc diagonal-split: clip split, floating rings, ransom-note words, grayscale hover, click burst */

/* Diagonal split zone */
.intro-arc2__split {
    clip-path: polygon(0 0, 100% 0, 100% 62%, 0 100%);
    opacity: 0.6;
}

/* Floating rings / donuts (fixed size — no BS w-N/h-N utility) */
.intro-arc2__ring { width: 10rem; height: 10rem; animation: intro-arc2-float 7s ease-in-out infinite; }
.intro-arc2__ring--2 { width: 6rem; height: 6rem; animation-duration: 9s; animation-delay: 1s; }
@keyframes intro-arc2-float {
    50% { transform: translateY(-1.2rem) rotate(20deg); }
}

/* Serif accent (paired with sans body) */
.intro-arc2__serif { font-family: ui-serif, Georgia, "Times New Roman", serif; }

/* Hero image grayscale → colour reveal on hover */
.intro-arc2__figure { aspect-ratio: 4 / 3; }
.intro-arc2__img {
    object-fit: cover;
    filter: grayscale(1);
    transition: filter 420ms ease;
}
.intro-arc2__figure:hover .intro-arc2__img { filter: grayscale(0); }

/* Ransom-note mixed letters: alternate rotation, weight, family (no colour) */
.intro-arc2__word {
    display: inline-block;
    margin-right: 0.25em;
}
.intro-arc2__word:nth-child(3n+1) { transform: rotate(-4deg); font-weight: 900; }
.intro-arc2__word:nth-child(3n+2) { transform: rotate(3deg);  font-family: ui-serif, Georgia, serif; font-style: italic; }
.intro-arc2__word:nth-child(3n+3) { transform: rotate(-1deg); font-weight: 700; text-transform: uppercase; }

/* Click burst spark (inherits the button's primary colour via currentColor) */
.intro-arc2__react { position: relative; overflow: visible; }
.intro-arc2__spark {
    position: absolute;
    left: 50%;
    top: 50%;
    pointer-events: none;
    animation: intro-arc2-burst 640ms ease-out forwards;
}
@keyframes intro-arc2-burst {
    to { opacity: 0; transform: translate(var(--dx), var(--dy)) scale(0.4) rotate(160deg); }
}

@media (prefers-reduced-motion: reduce) {
    .intro-arc2__ring { animation: none; }
}

.content-brief__float-square {
    width: 4rem;
    height: 4rem;
}

.content-brief__orbit {
    left: 50%;
    top: 50%;
    width: min(34rem, 78vw);
    height: min(34rem, 78vw);
    transform: translate(-50%, -50%);
    animation: content-brief-orbit 18s linear infinite;
}

.content-brief__float-square--slow {
    animation: content-brief-float-slow 10s ease-in-out infinite;
}

.content-brief__float-square--fast {
    animation: content-brief-float-fast 7s ease-in-out infinite;
}

@keyframes content-brief-float-slow {
    0%,
    100% {
        transform: translateY(0) rotate(0deg);
    }

    50% {
        transform: translateY(-8px) rotate(6deg);
    }
}

@keyframes content-brief-float-fast {
    0%,
    100% {
        transform: translateY(0) rotate(0deg);
    }

    50% {
        transform: translateY(8px) rotate(-7deg);
    }
}

@keyframes content-brief-orbit {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }

    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

.gallery-zigzag__w-40 { width: 10rem; }
.gallery-zigzag__h-40 { height: 10rem; }
.gallery-zigzag__top-20 { top: 5rem; }

.gallery-zigzag__ratio-3x4 {
    --bs-aspect-ratio: 133.333333%;
}

.gallery-zigzag__hover-scale {
    transition: transform 0.3s ease;
}
.gallery-zigzag__hover-scale:hover {
    transform: scale(1.05);
}

.gallery-zigzag__group-hover-opacity {
    opacity: 0;
    transition: opacity 0.3s ease;
}
.gallery-zigzag__item:hover .gallery-zigzag__group-hover-opacity {
    opacity: 1;
}

.gallery-zigzag__translate-y-full {
    transform: translateY(100%);
    transition: transform 0.5s ease;
}
.gallery-zigzag__item:hover .gallery-zigzag__group-hover-translate-y-0 {
    transform: translateY(0);
}

.gallery-zigzag__group-hover-scale-110 {
    transition: transform 0.5s ease;
}
.gallery-zigzag__item:hover .gallery-zigzag__group-hover-scale-110 {
    transform: scale(1.1);
}

/* glossary gazette — multi-column flow (not CSS grid), brick avoid breaks, footnote icon */
.glossary-gazette__columns {
    column-count: 1;
    column-gap: 1.25rem;
}

@media (min-width: 768px) {
    .glossary-gazette__columns {
        column-count: 2;
        column-gap: 1.5rem;
    }
}

@media (min-width: 1200px) {
    .glossary-gazette__columns {
        column-count: 3;
    }
}

.glossary-gazette__brick {
    break-inside: avoid;
    margin-bottom: 1rem;
}

.glossary-gazette__note-ico {
    width: 3.25rem;
    height: 3.25rem;
}

.glossary-gazette__note-icon {
    font-size: 1.25rem;
    line-height: 1;
}