/* =========================================
   BookHive Reader CSS
   Shared by library.html and sample.html
   ========================================= */

/* ---- Library Page ---- */

.library-hero {
    background: var(--bg-secondary);
    padding: calc(80px + var(--spacing-2xl)) 0 var(--spacing-2xl);
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.library-hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
}

.library-hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 520px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.7;
}

.library-hero-meta {
    font-size: 0.875rem;
    color: var(--text-light);
}

.library-hero-meta strong {
    color: var(--primary-color);
}

.library-section {
    padding: var(--spacing-2xl) 0 var(--spacing-3xl);
}

.genre-filter {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xl);
    justify-content: center;
}

.genre-btn {
    padding: 0.375rem 1rem;
    border: 1.5px solid var(--border-color);
    border-radius: 2rem;
    background: white;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: var(--font-family);
}

.genre-btn:hover,
.genre-btn.active {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(196, 106, 30, 0.06);
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: var(--spacing-xl);
}

.book-card {
    display: flex;
    flex-direction: column;
    cursor: pointer;
    transition: transform var(--transition-base);
}

.book-card:hover {
    transform: translateY(-4px);
}

.book-card:hover .book-cover-img {
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.22);
}

.book-cover-wrap {
    aspect-ratio: 2 / 3;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-secondary);
    position: relative;
}

.book-cover-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: box-shadow var(--transition-base);
    border-radius: var(--radius-md);
}

.book-card-body {
    padding: var(--spacing-sm) 0 0;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.book-genre-tag {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--primary-color);
}

.book-card-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
    margin: 0;
}

.book-card-author {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.book-card-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
    transition: gap var(--transition-base);
}

.book-card-cta:hover {
    gap: 0.6rem;
}

.book-card-cta svg {
    flex-shrink: 0;
}

/* ---- Sample Reader Page ---- */

.reader-page {
    background: #fff;
}

/* Progress bar */
.read-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0%;
    background: var(--gradient-primary);
    z-index: 2000;
    transition: width 0.1s linear;
}

/* Book header */
.reader-book-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: calc(80px + var(--spacing-lg)) 0 var(--spacing-xl);
}

.reader-book-header .container {
    display: flex;
    gap: var(--spacing-xl);
    align-items: flex-start;
}

.reader-back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: var(--spacing-md);
    transition: color var(--transition-base);
    white-space: nowrap;
}

.reader-back-link:hover {
    color: var(--primary-color);
}

.reader-cover {
    width: 140px;
    flex-shrink: 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0,0,0,0.18);
}

.reader-cover img {
    width: 100%;
    display: block;
}

.reader-book-meta {
    flex: 1;
    padding-top: var(--spacing-xs);
}

.reader-genre-tag {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.reader-book-title {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 0.375rem;
    color: var(--text-primary);
}

.reader-book-author {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.reader-sample-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    background: rgba(196, 106, 30, 0.1);
    border: 1px solid rgba(196, 106, 30, 0.25);
    color: var(--primary-dark);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.3rem 0.75rem;
    border-radius: 2rem;
}

.reader-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

/* Reading content area */
.reader-content-wrap {
    max-width: 700px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-md);
    padding-bottom: 140px; /* clearance for audio player */
}

.reader-chapter-label {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-light);
    margin-bottom: var(--spacing-xl);
}

.reader-text p {
    font-size: 1.125rem;
    line-height: 1.9;
    color: #1a1a1a;
    margin-bottom: 1.6em;
    text-indent: 1.5em;
}

.reader-text p:first-child {
    text-indent: 0;
}

.reader-text p:first-child::first-letter {
    font-size: 3.5rem;
    font-weight: 800;
    float: left;
    line-height: 0.8;
    margin-right: 0.1em;
    margin-top: 0.1em;
    color: var(--primary-color);
}

/* End of sample */
.sample-end-divider {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin: var(--spacing-2xl) 0;
    color: var(--text-light);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.sample-end-divider::before,
.sample-end-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.sample-end-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.sample-end-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.sample-end-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
}

.sample-end-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 480px;
    margin: 0 auto var(--spacing-lg);
}

.sample-end-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.sample-end-stat {
    text-align: center;
}

.sample-end-stat-number {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.sample-end-stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.2rem;
}

.sample-end-price {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
}

.sample-end-price strong {
    color: var(--text-primary);
}

.sample-end-secondary {
    margin-top: var(--spacing-md);
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-light);
}

.sample-end-secondary a {
    color: var(--text-secondary);
    text-decoration: none;
}

.sample-end-secondary a:hover {
    color: var(--primary-color);
}

/* ---- Audio Player (fixed bottom) ---- */

.audio-player-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #111827;
    color: white;
    padding: 0.875rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 1500;
    box-shadow: 0 -4px 24px rgba(0,0,0,0.25);
}

.audio-player-cover {
    width: 40px;
    height: 40px;
    border-radius: 4px;
    object-fit: cover;
    flex-shrink: 0;
}

.audio-player-info {
    min-width: 0;
    flex-shrink: 0;
    max-width: 160px;
}

.audio-player-title {
    font-size: 0.8125rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: white;
}

.audio-player-author {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.55);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.audio-play-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-color);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background var(--transition-base), transform var(--transition-base);
    color: white;
}

.audio-play-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.audio-seek-wrap {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    min-width: 0;
}

.audio-seek-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.audio-seek {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: rgba(255,255,255,0.2);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.audio-seek::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
}

.audio-seek::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
}

.audio-time {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.55);
    white-space: nowrap;
    flex-shrink: 0;
    font-variant-numeric: tabular-nums;
    min-width: 80px;
    text-align: right;
}

.audio-volume-wrap {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.audio-volume-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: rgba(255,255,255,0.6);
    display: flex;
    align-items: center;
    padding: 0;
}

.audio-volume-btn:hover {
    color: white;
}

.audio-volume {
    width: 72px;
    -webkit-appearance: none;
    appearance: none;
    height: 3px;
    background: rgba(255,255,255,0.2);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.audio-volume::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: white;
    cursor: pointer;
}

.audio-volume::-moz-range-thumb {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: white;
    cursor: pointer;
    border: none;
}

/* Loading / error states */
.reader-loading,
.reader-error {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    color: var(--text-secondary);
    text-align: center;
    padding: var(--spacing-2xl);
}

.reader-loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Homepage samples section */
.samples-section {
    padding: var(--spacing-3xl) 0;
}

.samples-scroll {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.samples-view-all {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* Responsive */
@media (max-width: 768px) {
    .reader-book-header .container {
        flex-direction: column;
    }

    .reader-cover {
        width: 110px;
    }

    .reader-book-title {
        font-size: 1.5rem;
    }

    .reader-text p {
        font-size: 1rem;
    }

    .reader-text p:first-child::first-letter {
        font-size: 2.5rem;
    }

    .audio-player-info {
        display: none;
    }

    .audio-player-cover {
        display: none;
    }

    .audio-volume-wrap {
        display: none;
    }

    .sample-end-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .books-grid {
        grid-template-columns: repeat(auto-fill, minmax(145px, 1fr));
        gap: var(--spacing-md);
    }

    .library-hero-title {
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .reader-content-wrap {
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }

    .sample-end-card {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .audio-player-bar {
        padding: 0.75rem 1rem;
        gap: 0.75rem;
    }
}