/* ========================================
   Chapter - Immersive Reading Layout
   Full-width, no sidebar, centered content
   ======================================== */

.chapter-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

/* ── Chapter Header ── */
.chapter-header {
    text-align: center;
    padding: 32px 0 24px;
    border-bottom: 2px solid var(--ink-accent);
    margin-bottom: 24px;
}

.chapter-title {
    font-size: 26px;
    font-weight: 700;
    font-family: var(--font-serif);
    margin-bottom: 12px;
    line-height: 1.4;
}

.chapter-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    font-size: 14px;
    color: var(--ink-muted);
}

.chapter-meta i {
    color: var(--ink-accent);
    margin-right: 6px;
}

/* ── CTA ── */
.chapter-cta {
    text-align: center;
    padding: 20px;
    margin-bottom: 24px;
    background: var(--ink-accent-light);
    border-left: 4px solid var(--ink-accent);
}

.chapter-cta .ink-btn {
    min-width: 240px;
}

/* ── Content ── */
.chapter-content {
    background: var(--ink-surface);
    padding: 36px 40px;
    box-shadow: var(--ink-shadow);
    font-size: 17px;
    line-height: 2;
    color: var(--ink-secondary);
    margin-bottom: 24px;
    border-top: 3px solid var(--ink-accent);
}

.chapter-content p {
    margin-bottom: 1.2em;
    text-indent: 2em;
    text-align: justify;
}

.chapter-content img {
    max-width: 100%;
    height: auto;
    margin: 20px auto;
    display: block;
}

/* ── Navigation ── */
.chapter-nav {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.chapter-nav-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 14px 16px;
    font-size: 15px;
    font-weight: 600;
    color: var(--ink-secondary);
    background: var(--ink-surface);
    border: 1px solid var(--ink-border);
    box-shadow: var(--ink-shadow);
    transition: all var(--duration) var(--ease-out);
}

.chapter-nav-btn:hover {
    color: var(--ink-accent);
    border-color: var(--ink-accent);
    background: var(--ink-accent-light);
}

.chapter-nav-index {
    color: #fff;
    background: var(--ink-accent);
    border-color: var(--ink-accent);
    flex: 0.8;
}

.chapter-nav-index:hover {
    color: #fff;
    background: var(--ink-accent-dark);
    border-color: var(--ink-accent-dark);
}

.chapter-nav-disabled {
    color: var(--ink-light);
    cursor: not-allowed;
    background: var(--ink-bg);
}

.chapter-nav-disabled:hover {
    color: var(--ink-light);
    border-color: var(--ink-border);
    background: var(--ink-bg);
}

/* ── Recommendations ── */
.chapter-recommend {
    background: var(--ink-surface);
    box-shadow: var(--ink-shadow);
    overflow: hidden;
    margin-bottom: 24px;
}

.chapter-recommend-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
}

.chapter-recommend-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    font-size: 14px;
    color: var(--ink-secondary);
    border-bottom: 1px solid var(--ink-border-light);
    border-right: 1px solid var(--ink-border-light);
    transition: background var(--duration) var(--ease-out);
}

.chapter-recommend-item:hover {
    background: var(--ink-wash);
    color: var(--ink-accent);
}

.chapter-recommend-item:nth-child(even) { border-right: none; }

.chapter-recommend-rank {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    color: var(--ink-light);
    font-family: var(--font-serif);
}

.chapter-recommend-item:nth-child(1) .chapter-recommend-rank,
.chapter-recommend-item:nth-child(2) .chapter-recommend-rank,
.chapter-recommend-item:nth-child(3) .chapter-recommend-rank {
    color: #fff;
    border-radius: 50%;
}

.chapter-recommend-item:nth-child(1) .chapter-recommend-rank { background: var(--ink-accent); }
.chapter-recommend-item:nth-child(2) .chapter-recommend-rank { background: var(--ink-secondary); }
.chapter-recommend-item:nth-child(3) .chapter-recommend-rank { background: var(--ink-muted); }

.chapter-recommend-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ══════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════ */
@media (max-width: 768px) {
    .chapter-wrapper { padding: 0; }

    .chapter-title { font-size: 22px; }

    .chapter-meta { gap: 16px; font-size: 13px; }

    .chapter-content {
        padding: 24px 20px;
        font-size: 16px;
        line-height: 1.9;
    }

    .chapter-nav { flex-direction: column; gap: 8px; }

    .chapter-nav-btn { padding: 12px; }

    .chapter-recommend-list { grid-template-columns: 1fr; }

    .chapter-recommend-item { border-right: none; }
}

@media (max-width: 480px) {
    .chapter-title { font-size: 20px; }

    .chapter-content {
        padding: 20px 16px;
        font-size: 15px;
    }

    .chapter-cta .ink-btn {
        min-width: auto;
        width: 100%;
    }
}