.intro-animated-gradient__root {
    padding-top: clamp(4rem, 12vw, 10rem);
    padding-bottom: clamp(4rem, 12vw, 10rem);
    min-height: min(32rem, 85vh);
}

@keyframes intro-animated-gradient-spin {
    to {
        transform: rotate(360deg);
    }
}

.intro-animated-gradient__spin--left,
.intro-animated-gradient__spin--right {
    width: 85%;
    height: 85%;
    top: 7.5%;
    animation-name: intro-animated-gradient-spin;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    transform-origin: 50% 50%;
}

.intro-animated-gradient__spin--left {
    left: -18%;
    animation-duration: 48s;
}

.intro-animated-gradient__spin--right {
    right: -18%;
    animation-duration: 60s;
    animation-direction: reverse;
}

.intro-animated-gradient__area {
    max-width: 48rem;
}

/* About v10 — tab visibility and active state (no palette in CSS) */

.guide-sq-8  { width: 2rem;   height: 2rem;   flex-shrink: 0; }
.guide-sq-12 { width: 3rem;   height: 3rem;   flex-shrink: 0; }
.guide-sq-16 { width: 4rem;   height: 4rem;   flex-shrink: 0; }
.guide-sq-20 { width: 5rem;   height: 5rem;   flex-shrink: 0; }

.guide-ab10-tab-panel.guide-ab10-tab-panel-hidden {
    display: none;
}

.guide-ab10-tab-btn.guide-ab10-tab-active {
    font-weight: 700;
    transform: translateY(-1px);
}

.guide-ab10-tab-btn.guide-ab10-tab-inactive {
    font-weight: 500;
    opacity: 0.9;
}

.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 plain — thin vertical rule height (BS has no h-16 spine utility) */
.content-plain__fine-rule {
    height: 6rem;
}

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

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

/* Layout parity: Bootstrap bs: branch — values match theme/tailwind spacing (see v11 tw:) */
.content-v11-bs--root {
    padding-top: 6rem;
    padding-bottom: 6rem;
}

.content-v11-bs--area {
    max-width: 80rem;
    margin-left: auto;
    margin-right: auto;
}

.content-v11-bs--row {
    gap: 2rem;
}

@media (min-width: 992px) {
    .content-v11-bs--col-copy {
        max-width: 42rem;
    }
}

.content-v11-bs--panel-mb {
    margin-bottom: 2rem;
}

.content-v11-bs--col-visual {
    position: relative;
}

.content-v11-bs--media-back {
    position: absolute;
    top: 10rem;
    left: 1.25rem;
    width: 80%;
    pointer-events: none;
}

.content-v11-bs--media-front {
    position: relative;
    z-index: 10;
    margin-bottom: 5rem;
    margin-left: 2rem;
    width: 50%;
}

.content-grid-gap {
    gap: 2rem;
}

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

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

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

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

.content-margin-notes__aside {
    align-self: start;
}

@media (min-width: 992px) {
    .content-margin-notes__aside {
        position: sticky;
        top: 2rem;
    }
}