/* Native FABRIC8 walkthrough surface. Uses the shared shell tokens rather
   than duplicating a page-specific theme. */
.f8-walkthrough {
    max-width: min(100%, 136rem);
    margin: 0 auto;
    padding: clamp(1rem, 2vw, 2.25rem) 0 1rem;
}

@media (min-width: 96rem) {
    .f8-main.f8-shell:has(#f8-walkthrough-page) {
        width: min(calc(100% - 4rem), 142rem);
    }
}

.f8-walkthrough__header,
.f8-walkthrough__media-panel,
.f8-walkthrough__statement,
.f8-walkthrough__panel {
    border: 1px solid var(--f8-line);
    background: rgba(9, 11, 14, 0.72);
}

.f8-walkthrough__header {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 2rem;
    padding: clamp(1.25rem, 3.5vw, 3rem);
    border-radius: var(--f8-radius-lg) var(--f8-radius-lg) 0 0;
    border-bottom: 0;
}

.f8-walkthrough__header h1,
.f8-walkthrough h2,
.f8-walkthrough p {
    margin: 0;
}

.f8-walkthrough__header h1 {
    max-width: none;
    font-size: clamp(2.15rem, 5vw, 5.2rem);
    font-weight: 760;
    letter-spacing: -0.065em;
    line-height: 0.94;
}

.f8-walkthrough__header p {
    max-width: 46rem;
    margin-top: 0.85rem;
    color: var(--f8-muted);
    font-size: clamp(0.92rem, 1.35vw, 1.08rem);
}

.f8-walkthrough__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.65rem;
}

.f8-walkthrough__back,
.f8-walkthrough__fullscreen {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.7rem;
    padding: 0.65rem 1rem;
    border: 1px solid var(--f8-line);
    border-radius: 0.6rem;
    background: #11161d;
    color: var(--f8-ink);
    font: 750 0.78rem/1.2 var(--f8-sans);
    letter-spacing: 0.025em;
    text-align: center;
    text-decoration: none;
    white-space: normal;
}

.f8-walkthrough__fullscreen {
    cursor: pointer;
}

.f8-walkthrough__fullscreen:hover,
.f8-walkthrough__back:hover {
    border-color: rgba(201, 162, 78, 0.7);
    background: #171c23;
}

.f8-walkthrough__fullscreen[aria-pressed="true"] {
    border-color: rgba(90, 169, 154, 0.78);
    color: #d9f4ec;
}

.f8-walkthrough__fullscreen:disabled {
    cursor: default;
    opacity: 0.7;
}

.f8-walkthrough__media-panel {
    padding: clamp(0.7rem, 1.4vw, 1.25rem);
    border-radius: 0 0 var(--f8-radius-lg) var(--f8-radius-lg);
    box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.2);
}

.f8-walkthrough__figure {
    display: block;
    margin: 0;
}

.f8-walkthrough__video {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    max-height: none;
    border: 1px solid rgba(207, 211, 215, 0.26);
    border-radius: calc(var(--f8-radius) - 0.2rem);
    background: #000;
    object-fit: contain;
}

.f8-walkthrough__statement {
    margin-top: clamp(2rem, 5vw, 5rem);
    padding: clamp(1.25rem, 3vw, 3rem);
    border-radius: var(--f8-radius-lg);
}

.f8-walkthrough h2 {
    color: var(--f8-muted);
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.13em;
    line-height: 1.3;
    text-transform: uppercase;
}

.f8-walkthrough__beats {
    display: grid;
    gap: clamp(0.75rem, 1.7vw, 1.4rem);
    max-width: 62rem;
    margin-top: clamp(1.5rem, 3vw, 2.8rem);
}

.f8-walkthrough__beats p {
    max-width: 39ch;
    color: #d9dfe5;
    font-size: clamp(1.12rem, 2.1vw, 1.8rem);
    font-weight: 460;
    letter-spacing: -0.025em;
    line-height: 1.16;
}

.f8-walkthrough__beats strong {
    color: var(--f8-amber);
    font-weight: 720;
}

.f8-walkthrough__beats .f8-walkthrough__beat--lead {
    max-width: 26ch;
    color: var(--f8-ink);
    font-size: clamp(1.7rem, 3.6vw, 3.5rem);
    font-weight: 750;
    letter-spacing: -0.055em;
    line-height: 0.98;
}

.f8-walkthrough__beats .f8-walkthrough__beat--boundary {
    margin-top: 0.45rem;
    color: #f1d79d;
}

.f8-walkthrough__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.f8-walkthrough__panel {
    min-height: 11rem;
    padding: clamp(1.1rem, 2.3vw, 2rem);
    border-radius: var(--f8-radius);
}

.f8-walkthrough__panel p {
    max-width: 48rem;
    margin-top: 0.9rem;
    color: var(--f8-muted);
    font-size: 0.93rem;
    line-height: 1.58;
}

.f8-demo-run__summary {
    margin-top: clamp(1.25rem, 2.7vw, 2.5rem);
    padding: clamp(1rem, 2.1vw, 1.75rem) clamp(1.15rem, 2.7vw, 2.25rem);
    border-left: 3px solid rgba(201, 162, 78, 0.78);
    background: rgba(9, 11, 14, 0.68);
    color: var(--f8-muted);
}

.f8-demo-run__summary p {
    max-width: 78ch;
    margin: 0;
    font-size: clamp(0.96rem, 1.25vw, 1.12rem);
    line-height: 1.55;
}

/* True Fullscreen API: documentElement is the actual owner. Do not prevent
   document scrolling; the standard scrollbar remains available as needed. */
html.f8-walkthrough-page-fullscreen,
html.f8-walkthrough-page-fullscreen body {
    min-height: 100%;
    overflow-y: auto;
}

html.f8-walkthrough-page-fullscreen .f8-header {
    position: sticky;
}

html.f8-walkthrough-page-fullscreen .f8-main {
    min-height: 0;
}

@media (max-width: 58rem) {
    .f8-walkthrough__header {
        align-items: start;
        flex-direction: column;
    }

    .f8-walkthrough__actions {
        justify-content: flex-start;
    }

    .f8-walkthrough__grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 34rem) {
    .f8-walkthrough {
        padding-top: 0.5rem;
    }

    .f8-walkthrough__header,
    .f8-walkthrough__media-panel,
    .f8-walkthrough__statement,
    .f8-walkthrough__panel {
        border-radius: var(--f8-radius);
    }

    .f8-walkthrough__header {
        gap: 1rem;
    }

    .f8-walkthrough__actions {
        display: grid;
        grid-template-columns: 1fr;
        width: 100%;
    }

    .f8-walkthrough__back,
    .f8-walkthrough__fullscreen {
        width: 100%;
        min-height: 2.85rem;
    }

    .f8-walkthrough__media-panel {
        margin-top: 0.75rem;
        padding: 0.45rem;
    }

    .f8-walkthrough__statement {
        margin-top: 1.25rem;
    }
}