.card-stack__accent--1 { width: 10rem; height: 10rem; filter: blur(2rem); }
.card-stack__accent--2 { width: 12rem; height: 12rem; filter: blur(2rem); }
.card-stack__accent--3 { width: 8rem; height: 8rem; filter: blur(1.5rem); }
.card-stack__accent--4 { width: 9rem; height: 9rem; filter: blur(2rem); }

.card-stack__title-line--1, .card-stack__title-line--2 {
    width: 5rem; height: 0.125rem; transform: translateY(-50%);
}
.card-stack__title-dot--1 { width: 0.5rem; height: 0.5rem; top: -0.5rem; right: -0.5rem; }
.card-stack__title-dot--2 { width: 0.5rem; height: 0.5rem; bottom: -0.5rem; left: -0.5rem; }

.card-stack__corner--tl { top: -0.5rem; left: -0.5rem; width: 1.5rem; height: 1.5rem; }
.card-stack__corner--tr { top: -0.5rem; right: -0.5rem; width: 1.5rem; height: 1.5rem; }
.card-stack__corner--bl { bottom: -0.5rem; left: -0.5rem; width: 1.5rem; height: 1.5rem; }
.card-stack__corner--br { bottom: -0.5rem; right: -0.5rem; width: 1.5rem; height: 1.5rem; }

.card-stack__corner--fade {
    opacity: 0;
    transition: opacity 0.3s ease;
}
.card-stack__item:hover .card-stack__corner--fade {
    opacity: 1;
}

.card-stack__media--hover {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 0.5rem 1rem rgba(0,0,0,0.1);
}
.card-stack__item:hover .card-stack__media--hover {
    transform: scale(1.05);
    box-shadow: 0 1rem 3rem rgba(0,0,0,0.2);
}

.card-stack__decor--glow {
    background: radial-gradient(circle at center, rgba(var(--bs-primary-rgb), 0.2), transparent);
    opacity: 0;
    transition: opacity 0.5s ease;
}
.card-stack__item:hover .card-stack__decor--glow {
    opacity: 1;
}

.card-stack__img--zoom {
    transition: transform 0.5s ease;
}
.card-stack__item:hover .card-stack__img--zoom {
    transform: scale(1.1);
}

.card-stack__overlay--fade {
    opacity: 0;
    transition: opacity 0.3s ease;
}
.card-stack__item:hover .card-stack__overlay--fade {
    opacity: 1;
}

.card-stack__overlay--dark {
    opacity: 0;
    transition: opacity 0.3s ease;
}
.card-stack__item:hover .card-stack__overlay--dark {
    opacity: 1;
}

.card-stack__inner-corner--tl, .card-stack__inner-corner--br {
    width: 4rem; height: 4rem;
}

.card-stack__badge--shadow {
    transition: box-shadow 0.3s ease;
    box-shadow: 0 0.25rem 0.5rem rgba(0,0,0,0.1);
}
.card-stack__item:hover .card-stack__badge--shadow {
    box-shadow: 0 0.5rem 1rem rgba(0,0,0,0.15);
}

.card-stack__accent-corner--tr { right: 0; width: 2rem; height: 2rem; opacity: 0; transition: opacity 0.3s ease; }
.card-stack__accent-corner--bl { left: 0; width: 2rem; height: 2rem; opacity: 0; transition: opacity 0.3s ease; }
.card-stack__item:hover .card-stack__accent-corner--tr,
.card-stack__item:hover .card-stack__accent-corner--bl {
    opacity: 1;
}

.card-stack__panel--slide {
    transform: translateY(100%);
    transition: transform 0.3s ease;
}
.card-stack__item:hover .card-stack__panel--slide {
    transform: translateY(0);
}

/* content gutter — bracket ticks share width */
.content-gutter__tick {
    width: 1px;
}

/* solo column: span full grid / row when second stack hidden */
.content-gutter__lead--span {
    grid-column: 1 / -1;
}

.content-col-grow {
    flex: 1 1 0%;
    min-width: 0;
}

.content-img-fill {
    display: block;
    width: 100%;
    height: 100%;
    min-height: 16rem;
    min-width: 0;
    object-fit: cover;
    flex-shrink: 0;
}

.narrative-chapter__column-inset {
    padding: 4rem;
}

.timeline-emblem {
    width: 5rem;
    height: 5rem;
}

.timeline-spark {
    width: 0.75rem;
    height: 0.75rem;
}

.timeline-cloud-left {
    width: 16rem;
    height: 16rem;
}

.timeline-cloud-right {
    width: 20rem;
    height: 20rem;
    animation-delay: 1s;
}

.timeline-cloud-center {
    width: 24rem;
    height: 24rem;
    animation-delay: 2s;
}

.timeline-outline-square {
    width: 5rem;
    height: 5rem;
    animation-duration: 3s;
}

.timeline-outline-orb {
    width: 4rem;
    height: 4rem;
    animation-duration: 4s;
    animation-delay: 1s;
}

.timeline-halo-start {
    width: 8rem;
    height: 8rem;
    animation-duration: 20s;
}

.timeline-halo-end {
    width: 10rem;
    height: 10rem;
    animation-duration: 25s;
    animation-direction: reverse;
}

.timeline-spark-side {
    animation-delay: 0.5s;
}

.timeline-spark-center {
    animation-delay: 1s;
}

.timeline-cloud-left,
.timeline-cloud-right,
.timeline-cloud-center {
    animation-name: timeline-cloud__pulse;
    animation-timing-function: ease-in-out;
    animation-iteration-count: infinite;
}

.timeline-outline-square,
.timeline-outline-orb {
    animation-name: timeline-outline__bounce;
    animation-timing-function: ease-in-out;
    animation-iteration-count: infinite;
}

.timeline-halo-start,
.timeline-halo-end {
    animation-name: timeline-halo__spin;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
}

.timeline-spark-top,
.timeline-spark-side,
.timeline-spark-center {
    animation-name: timeline-spark__ping;
    animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
    animation-iteration-count: infinite;
}

@keyframes timeline-cloud__pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes timeline-outline__bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-25%); }
}

@keyframes timeline-halo__spin {
    to { transform: rotate(360deg); }
}

@keyframes timeline-spark__ping {
    0% { transform: scale(1); opacity: 1; }
    75%, 100% { transform: scale(2); opacity: 0; }
}

.content-river__arc {
    width: 18rem;
    height: 18rem;
}

.content-river__node {
    width: 0.75rem;
    height: 0.75rem;
    transform: translate(-50%, -50%);
}

@media (min-width: 768px) {
    .content-river__copy--right {
        grid-column-start: 2;
    }

    .content-river__copy--left {
        grid-column-start: 1;
        grid-row-start: 1;
    }

    .content-river__spacer--left {
        order: 2;
    }
}

.content-focus-checklist__button {
    appearance: none;
    -webkit-appearance: none;
    font: inherit;
    cursor: pointer;
    outline-offset: 0.2rem;
    transition: transform 180ms ease;
}

.content-focus-checklist__button:hover {
    transform: translateY(-0.125rem);
}

.content-focus-checklist__button.is-active {
    transform: translateX(0.25rem);
}

/* min-width: 0 — довгий текст/флекс у колонці не роздуває рядок */
.content-col-grow {
    min-width: 0;
}

.content-stack-col--text {
    overflow-wrap: anywhere;
}

.content-stack-col--text > :first-child {
    width: 100%;
    max-width: 65ch;
    margin-inline: auto;
}

/* gap лише для Tailwind (grid). У Bootstrap — відступи через g-* у component (row-cols + g-3), без CSS gap на .row */
.content-grid-gap:not(.row) {
    gap: 1rem;
}

.content-full-frame {
    max-width: 80rem;
    margin-left: auto;
    margin-right: auto;
    width: 100%;
}

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

/* Третина рядка: стабільна висота прев’ю, без height:100% від сусіднього тексту */
.content-img-fullheight {
    display: block;
    width: 100%;
    max-width: min(100%, 28rem);
    margin-inline: auto;
    min-width: 0;
    aspect-ratio: 3 / 4;
    max-height: 28rem;
    height: auto;
    flex-shrink: 1;
    object-fit: cover;
    object-position: center;
}