/* ─────────────────────────────────────────────────────────────────────────
   Reader — StPageFlip doet de flip-animatie. Eigen styling bovenop:
   topbar, description-paneel, indicator, papier-look op de pagina's.
───────────────────────────────────────────────────────────────────────── */

/* Reader-pagina's: site-header verbergen voor full-viewport reading-experience.
   De reader heeft zijn eigen topbar met "retour"-knop voor navigatie. */
body.is-reader { overflow: hidden; height: 100vh; height: 100dvh; }
body.is-reader .site-header { display: none; }

.reader-body {
    background: linear-gradient(180deg, var(--cream) 0%, var(--cream-deep) 100%);
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
}

.reader-shell {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.reader-topbar {
    flex: 0 0 auto;
}

/* ── Topbar ───────────────────────────────────────────────────────────── */
.reader-topbar {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--line);
    background: rgba(252, 252, 236, 0.85);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 20;
}

.reader-topbar__back {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--ink-soft);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    text-decoration: none;
    padding: 0.4rem 0.7rem;
    border-radius: 999px;
    transition: all 0.15s ease;
}
.reader-topbar__back:hover {
    color: var(--burgundy);
    background: rgba(137, 4, 13, 0.06);
}

.reader-topbar__title {
    flex: 1;
    text-align: center;
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--ink);
    margin: 0;
    font-weight: 500;
    letter-spacing: 0.01em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.reader-topbar__actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.reader-topbar__btn {
    background: none;
    border: 1px solid transparent;
    color: var(--ink-soft);
    cursor: pointer;
    padding: 0.45rem 0.55rem;
    border-radius: 8px;
    transition: all 0.15s ease;
    line-height: 0;
}
.reader-topbar__btn:hover {
    color: var(--burgundy);
    background: rgba(137, 4, 13, 0.06);
    border-color: var(--line);
}
.reader-topbar__btn svg { width: 20px; height: 20px; }

/* ── Stage layout ─────────────────────────────────────────────────────── */
.reader-stage {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 0;
    align-items: stretch;
    min-height: 0;
    overflow: hidden;
}

.reader-canvas {
    position: relative;
    display: grid;
    grid-template-rows: 1fr auto;     /* book-stage neemt rest, footer onderaan */
    padding: 0.25rem 0.5rem 0;
    min-height: 0;
    min-width: 0;
    overflow: hidden;
}

.reader-canvas__stage {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 0;
    min-width: 0;
    overflow: hidden;
}

/* ── Description-panel ────────────────────────────────────────────────── */
.reader-aside {
    border-left: 1px solid var(--line);
    padding: 2rem 1.75rem;
    overflow-y: auto;
    background: var(--cream-light);
    max-height: calc(100vh - 60px);
}
.reader-aside__title {
    font-family: var(--font-display);
    font-size: 1.4rem;
    color: var(--burgundy);
    margin: 0 0 0.25rem;
    line-height: 1.2;
}
.reader-aside__cat {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--gold);
    margin-bottom: 1.25rem;
}
.reader-aside__body {
    font-size: 0.95rem;
    color: var(--ink-soft);
    line-height: 1.6;
}
.reader-aside__body p { margin: 0 0 1rem; }
.reader-aside__body strong { color: var(--ink); }

.reader-aside__progress {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--line);
    font-family: var(--font-sans);
    font-size: 0.78rem;
    color: var(--ink-mute);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

@media (max-width: 1279px) {
    .reader-stage { grid-template-columns: 1fr; }
    .reader-aside {
        position: fixed;
        right: 0;
        top: 60px;
        bottom: 0;
        width: min(380px, 90vw);
        z-index: 15;
        transform: translateX(100%);
        transition: transform 0.25s ease;
        box-shadow: var(--shadow-lg);
        max-height: calc(100vh - 60px);
    }
    .reader-aside.is-open { transform: translateX(0); }
}

/* ── Book + StPageFlip pages ──────────────────────────────────────────── */
/* JavaScript (`fitBook()` in reader.js) zet inline width/height op
   `.reader-book-frame` — de wrapper waarbinnen StPageFlip met
   `size: 'stretch'` zijn pages laat schalen. Frame = grootste passende
   rechthoek met juiste boek-aspect; book = 100% van frame. */
.reader-book-frame {
    /* width/height worden via JS ingesteld */
    flex: 0 0 auto;
}
.reader-book {
    width: 100%;
    height: 100%;
    user-select: none;
}

.book-page {
    background: var(--paper);
    overflow: hidden;
}
/* Blanco-pagina's (ruimte voor de cover en achterplat) — transparant
   zodat alleen de echte cover/achterplat zichtbaar is. StPageFlip's
   page-wrapper en shadow ook onzichtbaar maken. */
.book-page--blank {
    background: transparent !important;
    box-shadow: none !important;
}
.stf__item:has(> .book-page--blank),
.stf__block:has(.book-page--blank),
.stf__parent .stf__item--soft:has(.book-page--blank) {
    background: transparent !important;
    box-shadow: none !important;
}
.book-page img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    background: var(--paper);
}

.book-page--cover img {
    object-fit: cover;
}

/* StPageFlip injecteert .stf__parent rond .reader-book — geef hem
   bescheiden schaduw zodat het boek "op tafel" lijkt te liggen. */
.stf__parent {
    margin: 0 auto;
    filter: drop-shadow(0 12px 30px rgba(42, 37, 32, 0.18));
}

/* ── Indicator ────────────────────────────────────────────────────────── */
.reader-footer {
    flex: 0 0 auto;
    padding: 0.4rem 1.5rem 0.5rem;
}
.reader-indicator {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 0.7rem;
}

.reader-indicator__count {
    font-family: var(--font-sans);
    font-size: 0.78rem;
    color: var(--ink-mute);
    white-space: nowrap;
    min-width: 80px;
    letter-spacing: 0.04em;
}

.reader-indicator__dots {
    flex: 1;
    display: flex;
    gap: 4px;
    align-items: center;
}
.reader-dot {
    flex: 1;
    height: 3px;
    background: rgba(180, 157, 52, 0.25);
    border-radius: 2px;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.15s ease;
    border: 0;
    padding: 0;
    min-width: 4px;
}
.reader-dot:hover { background: var(--gold); }
.reader-dot.is-active {
    background: var(--burgundy);
    transform: scaleY(2);
}

/* ── Bar fallback voor >40 pagina's ───────────────────────────────────── */
.reader-bar {
    flex: 1;
    height: 4px;
    background: rgba(180, 157, 52, 0.25);
    border-radius: 2px;
    cursor: pointer;
    overflow: hidden;
    position: relative;
}
.reader-bar__fill {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    background: var(--burgundy);
    transition: width 0.25s ease;
    border-radius: 2px;
}

/* ── Mobile portrait: StPageFlip schakelt automatisch naar single-page ── */
@media (max-width: 760px) and (orientation: portrait) {
    .reader-canvas { padding: 1rem 0.5rem; }
}

/* ── Fullscreen state ─────────────────────────────────────────────────── */
.reader-body.is-fullscreen .site-header,
.reader-body.is-fullscreen .site-footer {
    display: none;
}

/* ── Aside backdrop op kleinere schermen ──────────────────────────────── */
.reader-backdrop {
    position: fixed;
    inset: 60px 0 0 0;
    background: rgba(42, 37, 32, 0.4);
    z-index: 14;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}
.reader-backdrop.is-visible {
    opacity: 1;
    pointer-events: auto;
}
@media (min-width: 1280px) {
    .reader-backdrop { display: none; }
}