/* home-book-mode.css
 * Book layout mode — full-bleed immersive layout for the home page.
 * Only book-mode-specific rules live here.
 * Global styles (LoreLand font, contrast, interactivity) are in home.css.
 */

/* ─── Overflow containment ───────────────────────────────────── */

html:has(#home-app[data-component-variant="book"]) {
    overflow-x: hidden;
}

/* ─── Shell: use the full page ───────────────────────────────── */

html:has(#home-app[data-component-variant="book"]) .site-shell {
    width: 100%;
    max-width: none;
    margin: 0;
    gap: 0;
}

/* ─── Topbar: floating, sticky ───────────────────────────────── */

html:has(#home-app[data-component-variant="book"]) .site-topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    padding: 0.6rem clamp(1rem, 3vw, 2.5rem);
    background: color-mix(in srgb, var(--color-bg-main) 85%, transparent 15%);
    backdrop-filter: blur(12px) saturate(1.2);
    -webkit-backdrop-filter: blur(12px) saturate(1.2);
    border-bottom: 1px solid color-mix(in srgb, var(--border-color-main) 40%, transparent 60%);
}

/* ─── Main app container ─────────────────────────────────────── */

#home-app[data-component-variant="book"] {
    gap: 0;
}

/* ─── Hero: full-bleed, compact ──────────────────────────────── */

#home-app[data-component-variant="book"] .hero-panel {
    border: none;
    border-radius: 0;
    padding: clamp(1.5rem, 4vw, 3rem) clamp(1.5rem, 6vw, 5rem) clamp(1.2rem, 3vw, 2rem);
    display: flex;
    flex-direction: column;
    justify-content: center;
    background:
        linear-gradient(170deg,
            color-mix(in srgb, var(--color-bg-main) 88%, var(--color-accent-main) 12%) 0%,
            var(--color-bg-main) 100%);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

#home-app[data-component-variant="book"] .hero-panel h1 {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    max-width: 18ch;
    margin-bottom: 0.3rem;
}

#home-app[data-component-variant="book"] .hero-subtitle {
    font-size: 1rem;
    max-width: 55ch;
    line-height: 1.5;
}

#home-app[data-component-variant="book"] .hero-actions {
    gap: 0.6rem;
    margin-top: 1rem;
}

#home-app[data-component-variant="book"] .hero-action {
    padding: 0.35rem 0.9rem;
    font-size: 0.88rem;
}

#home-app[data-component-variant="book"] .hero-frame-svg {
    display: none;
}

#home-app[data-component-variant="book"] .spw-block {
    max-width: 60ch;
    font-size: 0.95rem;
    padding: 0.8rem 1rem;
    border-radius: var(--border-radius-main);
}

/* ─── Full-bleed sections: compact, alternating ──────────────── */

#home-app[data-component-variant="book"] .chapter-timeline,
#home-app[data-component-variant="book"] .producer-constellation,
#home-app[data-component-variant="book"] .grammar-observatory,
#home-app[data-component-variant="book"] .spw-ethos-atlas,
#home-app[data-component-variant="book"] .seed-atlas {
    border: none;
    border-radius: 0;
    padding: clamp(1rem, 2.5vw, 1.8rem) clamp(1.5rem, 6vw, 5rem);
    border-top: 1px solid color-mix(in srgb, var(--border-color-main) 30%, transparent 70%);
}

#home-app[data-component-variant="book"] .chapter-timeline {
    background: var(--color-bg-content);
}

#home-app[data-component-variant="book"] .producer-constellation {
    background: var(--color-bg-main);
}

#home-app[data-component-variant="book"] .grammar-observatory {
    background: var(--color-bg-content);
}

#home-app[data-component-variant="book"] .spw-ethos-atlas {
    background: var(--color-bg-main);
}

#home-app[data-component-variant="book"] .seed-atlas {
    background: var(--color-bg-content);
}

/* ─── Chapter timeline ───────────────────────────────────────── */

#home-app[data-component-variant="book"] .chapter-timeline h2 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

#home-app[data-component-variant="book"] .chapter-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 0.8rem;
    margin-top: 0.8rem;
}

#home-app[data-component-variant="book"] .chapter-card {
    padding: 0.8rem;
    border-radius: calc(var(--border-radius-main) + 2px);
}

#home-app[data-component-variant="book"] .chapter-card h3 {
    font-size: 1rem;
    font-family: 'LoreLand', var(--font-family-heading);
    letter-spacing: 0.03em;
}

#home-app[data-component-variant="book"] .chapter-marker {
    font-size: 0.76rem;
    padding: 0.12rem 0.56rem;
}

/* ─── Two-column layout for lower panels (≥ 900px) ───────────── */

@media (min-width: 900px) {

    #home-app[data-component-variant="book"] .producer-constellation,
    #home-app[data-component-variant="book"] .grammar-observatory,
    #home-app[data-component-variant="book"] .spw-ethos-atlas,
    #home-app[data-component-variant="book"] .seed-atlas {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1rem 2rem;
        align-items: start;
    }

    /* Headings and subtitles span full width */
    #home-app[data-component-variant="book"] .producer-constellation h2,
    #home-app[data-component-variant="book"] .grammar-observatory h2,
    #home-app[data-component-variant="book"] .spw-ethos-atlas h2,
    #home-app[data-component-variant="book"] .seed-atlas h2,
    #home-app[data-component-variant="book"] .producer-constellation>p,
    #home-app[data-component-variant="book"] .grammar-observatory>p,
    #home-app[data-component-variant="book"] .grammar-observatory-subtitle,
    #home-app[data-component-variant="book"] .producer-intent,
    #home-app[data-component-variant="book"] .producer-guidance,
    #home-app[data-component-variant="book"] .seed-atlas-subtitle,
    #home-app[data-component-variant="book"] .timeline-subtitle,
    #home-app[data-component-variant="book"] .seed-controls,
    #home-app[data-component-variant="book"] .producer-constellation-subtitle {
        grid-column: 1 / -1;
    }

    #home-app[data-component-variant="book"] .producer-cluster-grid,
    #home-app[data-component-variant="book"] .grammar-matrix,
    #home-app[data-component-variant="book"] .grammar-ledger,
    #home-app[data-component-variant="book"] .seed-grid,
    #home-app[data-component-variant="book"] .ethos-claim-list,
    #home-app[data-component-variant="book"] .ethos-operator-list {
        grid-column: 1 / -1;
    }
}

/* ─── Footer ─────────────────────────────────────────────────── */

html:has(#home-app[data-component-variant="book"]) .site-footer {
    padding: 1rem clamp(1.5rem, 6vw, 5rem);
    border-top: 1px solid color-mix(in srgb, var(--border-color-main) 30%, transparent 70%);
}

/* ─── Responsive ─────────────────────────────────────────────── */

@media (max-width: 640px) {
    #home-app[data-component-variant="book"] .hero-panel {
        padding: 1.5rem 1rem 1rem;
    }

    #home-app[data-component-variant="book"] .hero-panel h1 {
        font-size: clamp(1.6rem, 7vw, 2.4rem);
    }

    #home-app[data-component-variant="book"] .chapter-grid {
        grid-template-columns: 1fr;
        gap: 0.6rem;
    }

    #home-app[data-component-variant="book"] .chapter-timeline,
    #home-app[data-component-variant="book"] .producer-constellation,
    #home-app[data-component-variant="book"] .grammar-observatory,
    #home-app[data-component-variant="book"] .spw-ethos-atlas,
    #home-app[data-component-variant="book"] .seed-atlas {
        padding: 1rem;
    }
}

@media (min-width: 1200px) {
    #home-app[data-component-variant="book"] .hero-panel {
        padding-left: 6vw;
        padding-right: 6vw;
    }

    #home-app[data-component-variant="book"] .chapter-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }
}

/* ─── Dark mode (book-specific) ──────────────────────────────── */

@media (prefers-color-scheme: dark) {
    #home-app[data-component-variant="book"] .hero-panel {
        background:
            linear-gradient(170deg,
                color-mix(in srgb, var(--theme-bg-main) 82%, var(--theme-accent-main) 18%) 0%,
                var(--theme-bg-main) 100%);
    }
}