/* E-katalog — landing ile uyumlu koyu / gold */
.project-flipbook-block {
    padding: 4rem 1.5rem 5rem;
    max-width: 1200px;
    margin: 0 auto;
    border-top: 1px solid var(--landing-border, rgba(212, 175, 55, 0.2));
}

.project-flipbook-title {
    text-align: center;
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--landing-gold, #d4af37);
    margin-bottom: 0.75rem;
}

.project-flipbook-desc {
    text-align: center;
    font-size: 0.95rem;
    color: var(--landing-text-muted, rgba(255, 255, 255, 0.75));
    max-width: 640px;
    margin: 0 auto 2rem;
    line-height: 1.6;
}

.flipbook-breakout {
    width: 100%;
}

.flipbook-shell {
    position: relative;
    max-width: min(100%, 960px);
    margin: 0 auto;
    padding: 0 3rem;
}

@media (max-width: 576px) {
    .flipbook-shell {
        padding: 0 2.5rem;
    }
}

.flipbook-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--landing-gold, #d4af37);
    background: rgba(0, 0, 0, 0.65);
    color: var(--landing-gold, #d4af37);
    font-size: 1.1rem;
    line-height: 1;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease, opacity 0.2s ease;
}

.flipbook-nav:hover:not(:disabled) {
    background: var(--landing-gold, #d4af37);
    color: #0d0d0d;
}

.flipbook-nav:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.flipbook-prev {
    left: 0;
}

.flipbook-next {
    right: 0;
}

.flipbook-viewport {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--landing-border, rgba(212, 175, 55, 0.2));
    background: rgba(10, 10, 10, 0.5);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.45);
}

.flipbook-aspect {
    position: relative;
    height: 0;
    width: 100%;
}

.flipbook-page-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center top;
    display: block;
    background: #0a0a0a;
}

.flipbook-page-indicator {
    text-align: center;
    font-size: 0.85rem;
    color: var(--landing-text-muted, rgba(255, 255, 255, 0.75));
    margin: 0.75rem 0 0;
}

.project-flipbook-block.reveal {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.55s ease, transform 0.55s ease;
}

.project-flipbook-block.reveal.is-visible {
    opacity: 1;
    transform: none;
}