.fc-block-alternating-sections-builder {
    --fc-alt-sticky-offset: clamp(1rem, 4vw, 3rem);
    --fc-alt-panel-justify: center;
    --fc-alt-panel-align: stretch;
    position: relative;
}

.fc-block-alternating-sections-builder.is-mode-stacked {
    --fc-alt-sticky-offset: clamp(8.5rem, 17vh, 11.5rem);
    --fc-alt-stack-offset: clamp(1.25rem, 2vw, 2.25rem);
    --fc-alt-stack-top-space: clamp(3rem, 8vh, 5.75rem);
    --fc-alt-panel-justify: flex-start;
}

.fc-block-alternating-sections-builder.has-vertical-align-top {
    --fc-alt-panel-justify: flex-start;
}

.fc-block-alternating-sections-builder.has-vertical-align-center {
    --fc-alt-panel-justify: center;
}

.fc-block-alternating-sections-builder.has-vertical-align-bottom {
    --fc-alt-panel-justify: flex-end;
}

.fc-block-alternating-sections-builder.has-horizontal-align-left {
    --fc-alt-panel-align: flex-start;
}

.fc-block-alternating-sections-builder.has-horizontal-align-center {
    --fc-alt-panel-align: center;
}

.fc-block-alternating-sections-builder.has-horizontal-align-right {
    --fc-alt-panel-align: flex-end;
}

.fc-block-alternating-sections-builder.has-horizontal-align-stretch {
    --fc-alt-panel-align: stretch;
}

.fc-block-alternating-sections-builder__scroll-area {
    min-height: calc(var(--fc-alt-section-count, 1) * 100vh);
}

.fc-block-alternating-sections-builder.is-mode-stacked .fc-block-alternating-sections-builder__scroll-area {
    min-height: calc((var(--fc-alt-section-count, 1) + 1) * 100vh);
}

.fc-block-alternating-sections-builder__sticky {
    position: sticky;
    top: var(--fc-alt-sticky-offset);
    min-height: calc(100vh - (var(--fc-alt-sticky-offset) * 2));
}

.fc-block-alternating-sections-builder__viewport {
    position: relative;
    min-height: calc(100vh - (var(--fc-alt-sticky-offset) * 2));
}

.fc-block-alternating-sections-builder__panel {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    will-change: transform, opacity;
}

.fc-block-alternating-sections-builder.is-mode-pinned .fc-block-alternating-sections-builder__panel {
    opacity: 0;
    pointer-events: none;
    transform: translateY(2rem);
    transition: opacity 0.45s ease, transform 0.45s ease;
}

.fc-block-alternating-sections-builder.is-mode-pinned .fc-block-alternating-sections-builder__panel.is-active {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
    z-index: 2;
}

.fc-block-alternating-sections-builder.is-mode-stacked .fc-block-alternating-sections-builder__panel {
    align-items: flex-start;
    opacity: 1;
    pointer-events: none;
    transform-origin: top center;
}

.fc-block-alternating-sections-builder.is-mode-stacked .fc-block-alternating-sections-builder__panel-inner {
    margin-top: var(--fc-alt-stack-top-space);
}

.fc-block-alternating-sections-builder.is-mode-stacked .fc-block-alternating-sections-builder__panel.is-active {
    pointer-events: auto;
}

.fc-block-alternating-sections-builder__panel-inner {
    display: flex;
    flex-direction: column;
    justify-content: var(--fc-alt-panel-justify);
    align-items: var(--fc-alt-panel-align);
    min-height: 100%;
    width: 100%;
}

.fc-block-alternating-sections-builder__panel-inner > *:last-child {
    margin-bottom: 0;
}

.fc-block-alternating-sections-builder.is-mode-stacked .fc-block-alternating-sections-builder__panel.is-content-revealing .fc-block-alternating-sections-builder__panel-inner {
    animation: fc-alt-panel-content-fade 320ms ease-out;
}

.fc-block-alternating-sections-builder.is-mode-stacked .fc-block-alternating-sections-builder__panel.is-content-hidden .fc-block-alternating-sections-builder__panel-inner * {
    visibility: hidden;
}

@keyframes fc-alt-panel-content-fade {
    from {
        opacity: 0.35;
    }

    to {
        opacity: 1;
    }
}

.fc-block-alternating-sections-builder__editor-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
    margin-bottom: 1rem;
}

.fc-block-alternating-sections-builder__editor-tab {
    display: inline-flex;
    align-items: center;
    border: 1px solid #dcdcde;
    border-radius: 999px;
    padding: 0.35rem 0.85rem;
    background: #fff;
    color: #1d2327;
    font-size: 12px;
    font-weight: 600;
    line-height: 1.2;
}

.fc-block-alternating-sections-builder__editor-tab.is-active {
    border-color: #1d2327;
    background: #1d2327;
    color: #fff;
}

.fc-block-alternating-section-editor {
    margin-top: 1rem;
    border: 1px solid #dcdcde;
    border-radius: 12px;
    padding: 1rem;
    background: #fff;
}

.fc-block-alternating-section-editor__header {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 1rem;
}

.fc-block-alternating-section-editor__label {
    color: #50575e;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.fc-block-alternating-sections-builder__editor-mode {
    margin-bottom: 1rem;
    color: #50575e;
    font-size: 12px;
    font-weight: 600;
}

@media (max-width: 781px) {
    .fc-block-alternating-sections-builder__scroll-area {
        min-height: 0;
    }

    .fc-block-alternating-sections-builder__sticky {
        position: static;
        min-height: 0;
    }

    .fc-block-alternating-sections-builder__viewport {
        min-height: 0;
        display: grid;
        gap: 1.5rem;
    }

    .fc-block-alternating-sections-builder__panel {
        position: relative;
        opacity: 1;
        pointer-events: auto;
        transform: none;
        transition: none;
    }
}