/* CFTS Stack tabs and panels. */
.stack-card {
    display: grid;
    gap: var(--site-grid-gap);
    margin-top: 15px;
	
    padding: var(--site-card-padding);
    border: 1px solid var(--site-line);
    border-radius: 8px;
    background: var(--site-panel);
    box-shadow: 0 18px 48px var(--site-shadow);
}

.stack-heading {
    display: grid;
    gap: 0;
}

.stack-heading h2 {
    max-width: 760px;
    margin: 0;
    font-family: var(--site-heading-font);
    font-size: clamp(1.55rem, 3.2vw, 2.35rem);
    line-height: 1.12;
    font-weight: 300;
    letter-spacing: 0;
}

.stack-heading p:not(.eyebrow) {
    max-width: none;
    margin: 12px 0 0;
    color: var(--site-muted);
    font-size: 0.94rem;
    line-height: 1.62;
}

.stack-layout {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 12px;
    align-items: start;
}

.stack-index {
    display: grid;
    gap: 8px;
    align-content: start;
}

.stack-tab {
    display: block;
    width: 100%;
    min-height: 38px;
    padding: 11px 13px;
    border: 1px solid var(--site-line);
    border-radius: 6px;
    background: color-mix(in srgb, var(--site-accent-soft) 58%, var(--site-panel) 42%);
    color: var(--site-accent-strong);
    font: inherit;
    font-size: 0.86rem;
    font-weight: 750;
    line-height: 1.25;
    text-align: left;
    cursor: pointer;
}

.stack-tab:hover,
.stack-tab:focus-visible {
    border-color: var(--site-accent-warm);
    color: var(--site-accent-warm);
    outline: 0;
}

.stack-tab[aria-selected="true"] {
    border-color: color-mix(in srgb, var(--site-accent-warm) 48%, var(--site-line));
    background: color-mix(in srgb, var(--site-accent-soft) 78%, var(--site-panel) 22%);
    color: var(--site-text);
}

.stack-content {
    min-width: 0;
}

.stack-content section {
    min-height: 150px;
    padding: 18px 20px;
    border: 1px solid color-mix(in srgb, var(--site-line) 72%, transparent);
    border-radius: 8px;
    background: color-mix(in srgb, var(--site-panel-raised) 42%, transparent);
}

.stack-content section[hidden] {
    display: none;
}

.stack-content h3 {
    margin: 0;
    color: var(--site-text);
    font-size: 1rem;
    line-height: 1.28;
}

.stack-content p {
    margin: 12px 0 0;
    color: var(--site-muted);
    font-size: 0.92rem;
    line-height: 1.62;
}

.stack-content p:first-of-type {
    margin-top: 12px;
}

@media (max-width: 900px) {
.stack-layout {
        grid-template-columns: 1fr;
    }
.stack-index {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
.stack-content section {
        min-height: 150px;
    }
}

@media (max-width: 640px) {
.stack-card {
        padding: var(--site-card-padding);
    }
.stack-index {
        grid-template-columns: 1fr;
    }
.stack-content section {
        min-height: 0;
    }
}