/* 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; }
}


.writeup-document__accent-trail {
    margin-bottom: 2rem;
    width: 4rem;
    height: 0.25rem;
}

.writeup-document__title-trail { margin-bottom: 2rem; }

.writeup-document__hull-section-pad {
    padding-top: 6rem;
    padding-bottom: 6rem;
}

.content-prose-measure {
    max-width: 48rem;
    margin-left: auto;
    margin-right: auto;
    width: 100%;
}

.content-heading-gap {
    margin-bottom: 2rem;
}

/* v22 - orbit hub board (grid-template-areas has no Tailwind/BS utility) */
[data-orbit-board] {
    display: grid;
    grid-template-columns: 1fr;
    grid-template-areas: "hub" "a" "b" "c" "d";
    gap: 1.5rem;
    align-items: center;
}

.steps-orbit-hub__hub {
    grid-area: hub;
    width: 6rem;
    height: 6rem;
    margin: 0 auto;
}

.radial-hub__badge {
    width: 3rem;
    height: 3rem;
}

[data-orbit-slot="0"] {
    grid-area: a;
}

[data-orbit-slot="1"] {
    grid-area: b;
}

[data-orbit-slot="2"] {
    grid-area: c;
}

[data-orbit-slot="3"] {
    grid-area: d;
}

@media (min-width: 768px) {
    [data-orbit-board] {
        grid-template-columns: 1fr auto 1fr;
        grid-template-areas:
            "a hub b"
            "c hub d";
    }
}

/* glossary ladder — figure offset */
.glossary-ladder__fig {
    transition: transform 0.2s ease;
}

.glossary-ladder__fig:hover {
    transform: translateX(4px);
}

/* Bootstrap: explicit grid + gap (row gutters often collapse) */
.tips-grid__bs-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
}

.tips-grid__min-shrink {
    min-width: 0;
}

@media (min-width: 768px) {
    .tips-grid__bs-row {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.tips-grid__subtitle {
    max-width: 42rem;
}

.tips-grid__thumb {
    width: 3rem;
    height: 3rem;
}