/* Book Mobile — Accordion viewer for small screens */

.book-zoom-overlay.mobile-book .book-zoom-canvas {
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.mb-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 1rem 1rem 4rem;
}

.mb-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0 1.5rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1rem;
}

.mb-book-img {
    width: 60px;
    height: auto;
    filter: drop-shadow(0 4px 12px rgba(0,0,0,0.4));
}

.mb-title {
    font-size: 1.4rem;
    font-weight: 300;
    letter-spacing: 0.12em;
    color: #f5c542;
}

.mb-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.15rem;
}

/* Section accordion */
.mb-section {
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 0.75rem;
    overflow: hidden;
    background: var(--bg-secondary);
}

.mb-section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 1rem;
    background: none;
    border: none;
    color: var(--text);
    font-family: inherit;
    font-size: 1rem;
    text-align: left;
    cursor: pointer;
    transition: background 0.2s;
}

.mb-section-header:hover {
    background: rgba(255,255,255,0.03);
}

.mb-section-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    background: rgba(59,130,246,0.15);
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 600;
    flex-shrink: 0;
}

.mb-section-sub {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 400;
}

.mb-chevron {
    margin-left: auto;
    font-size: 0.8rem;
    color: var(--text-muted);
    transition: transform 0.3s;
}

.mb-section.open .mb-chevron {
    transform: rotate(180deg);
}

/* Cards container */
.mb-cards {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    padding: 0 1rem;
}

.mb-section.open .mb-cards {
    padding-bottom: 1rem;
}

/* Individual card */
.mb-card {
    border: 1px solid var(--border);
    border-radius: 6px;
    margin-bottom: 0.5rem;
    overflow: hidden;
}

.mb-card-header {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(255,255,255,0.02);
    border: none;
    color: var(--text);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: background 0.2s;
    position: relative;
}

.mb-card-header::after {
    content: '+';
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.1rem;
    font-weight: 300;
}

.mb-card.open .mb-card-header::after {
    content: '−';
}

.mb-card-header:hover {
    background: rgba(255,255,255,0.05);
}

/* Card body */
.mb-card-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.mb-card.open .mb-card-body {
    padding: 0 1rem 1rem;
}

.mb-card-img {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    margin-bottom: 1rem;
    cursor: pointer;
}

.mb-card-lead {
    font-size: 1rem;
    line-height: 1.5;
    color: var(--text);
    margin-bottom: 0.75rem;
}

.mb-card-text {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-muted);
}

.mb-card-text p {
    margin-bottom: 0.75rem;
}

.mb-card-text strong {
    color: var(--text);
}

.mb-card-text ul {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0;
}

.mb-card-text ul li {
    padding: 0.3rem 0 0.3rem 1.25rem;
    position: relative;
}

.mb-card-text ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.7rem;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent);
}

.mb-highlight {
    background: var(--bg);
    border-left: 3px solid #f5c542;
    padding: 0.75rem 1rem;
    margin: 0.75rem 0;
    font-style: italic;
    color: var(--text);
    font-size: 0.9rem;
    line-height: 1.4;
}