:root {
    --bg-primary: #faf9f7;
    --bg-secondary: #f0efed;
    --bg-card: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #666;
    --accent: #c9a962;
    --accent-light: rgba(201, 169, 98, 0.15);
    --border: rgba(0, 0, 0, 0.08);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --danger: #e74c3c;
    --ring-books: #FF3B30;
    --ring-time: #30D158;
    --ring-vocab: #007AFF;
}

[data-theme="dark"] {
    --bg-primary: #0d0d0f;
    --bg-secondary: #1a1a1c;
    --bg-card: #222225;
    --text-primary: #f5f5f5;
    --text-secondary: #999;
    --accent-light: rgba(201, 169, 98, 0.2);
    --border: rgba(255, 255, 255, 0.1);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    transition: background 0.3s, color 0.3s;
}

/* Loading Screen */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-content {
    text-align: center;
}

.loading-logo {
    width: 80px;
    height: 80px;
    color: var(--accent);
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 1
    }

    50% {
        transform: scale(1.05);
        opacity: 0.8
    }
}

.loading-text {
    font-size: 0.9rem;
    letter-spacing: 0.3em;
    color: var(--text-secondary);
    margin-top: 1rem;
}

/* Header */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(250, 249, 247, 0.9);
    backdrop-filter: blur(20px);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
}

[data-theme="dark"] .app-header {
    background: rgba(13, 13, 15, 0.9);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    width: 40px;
    height: 40px;
    color: var(--accent);
}

.logo-title {
    font-family: 'Playfair Display', serif;
    font-size: 1.3rem;
    font-weight: 600;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    font-size: 0.9rem;
    font-weight: 500;
}

.icon-btn:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.icon-btn svg {
    width: 20px;
    height: 20px;
}

.btn-primary {
    padding: 0.75rem 1.25rem;
    background: var(--text-primary);
    color: var(--bg-primary);
    border: none;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-primary svg {
    width: 18px;
    height: 18px;
}

.btn-secondary {
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
}

.btn-danger {
    padding: 0.75rem 1.5rem;
    background: var(--danger);
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
}

.btn-full {
    width: 100%;
    justify-content: center;
    margin-top: 1rem;
}

.btn-share {
    gap: 0.75rem;
}

.btn-share svg {
    width: 18px;
    height: 18px;
}

/* Main Content */
.main-content {
    padding-top: 100px;
    max-width: 1400px;
    margin: 0 auto;
    padding-left: 2rem;
    padding-right: 2rem;
}

.hero-section {
    text-align: center;
    padding: 2rem 0 3rem;
}

.hero-greeting {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.hero-title {
    font-family: 'Playfair Display', serif;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    color: var(--accent);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Library Grid */
.library-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1.5rem;
    padding-bottom: 4rem;
}

.book-card {
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
}

.book-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.book-cover {
    width: 100%;
    aspect-ratio: 2/3;
    background: linear-gradient(135deg, var(--bg-secondary), var(--accent-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Playfair Display', serif;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
    padding: 1rem;
    line-height: 1.3;
}

.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-progress {
    height: 3px;
    background: var(--bg-secondary);
}

.book-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #d4b76a);
    transition: width 0.3s;
}

.book-info {
    padding: 0.75rem;
}

.book-title {
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-author {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.book-actions {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.2s;
}

.book-card:hover .book-actions {
    opacity: 1;
}

.book-action-btn {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.95);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.book-action-btn:hover {
    background: var(--danger);
    color: #fff;
}

.book-action-btn svg {
    width: 14px;
    height: 14px;
}

.format-badge {
    position: absolute;
    bottom: 60px;
    left: 8px;
    background: var(--accent);
    color: #fff;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
}

.genre-badge {
    position: absolute;
    bottom: 60px;
    right: 8px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.6rem;
}

/* Modals */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-card);
    border-radius: 20px;
    max-width: 480px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalIn 0.3s ease;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-large {
    max-width: 600px;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95)
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1)
    }
}

.modal-small {
    max-width: 360px;
    padding: 2rem;
    text-align: center;
}

.modal-small h3 {
    margin-bottom: 0.5rem;
    font-family: 'Playfair Display', serif;
}

.modal-small p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.modal-header h2 {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
}

.modal-close {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: none;
    background: var(--bg-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.modal-close:hover {
    background: var(--danger);
    color: #fff;
}

.modal-body {
    padding: 2rem;
    overflow-y: auto;
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: 16px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: var(--bg-secondary);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--accent);
    background: var(--accent-light);
}

.upload-zone svg {
    width: 48px;
    height: 48px;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.upload-zone h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.upload-zone p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.upload-zone input {
    display: none;
}

.format-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

.badge {
    padding: 0.25rem 0.75rem;
    background: var(--bg-secondary);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Upload Progress */
.upload-progress-content {
    text-align: center;
}

.upload-icon-animated svg {
    width: 48px;
    height: 48px;
    color: var(--accent);
    animation: bounce 1s infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0)
    }

    50% {
        transform: translateY(-10px)
    }
}

.upload-progress-content h3 {
    margin: 1rem 0;
}

.progress-bar-container {
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
    margin: 1rem 0;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #d4b76a);
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Genre Grid */
.genre-book-title {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-align: center;
}

.genre-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
}

.genre-item {
    padding: 0.75rem;
    background: var(--bg-secondary);
    border: 2px solid transparent;
    border-radius: 10px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.85rem;
}

.genre-item:hover {
    border-color: var(--accent);
}

.genre-item.selected {
    background: var(--accent-light);
    border-color: var(--accent);
    color: var(--accent);
}

/* Stats Modal */
.stats-body {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    align-items: center;
}

.stats-rings-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.stats-rings {
    width: 200px;
    height: 200px;
    transform: rotate(-90deg);
}

.ring-bg {
    fill: none;
    stroke: var(--bg-secondary);
}

.ring-progress {
    fill: none;
    stroke-linecap: round;
    transition: stroke-dashoffset 1s ease;
}

.ring-books {
    stroke: var(--ring-books);
}

.ring-time {
    stroke: var(--ring-time);
}

.ring-vocab {
    stroke: var(--ring-vocab);
}

.rings-labels {
    display: flex;
    gap: 1.5rem;
    text-align: center;
}

.ring-label {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.ring-value {
    font-family: 'Playfair Display', serif;
    font-size: 1.25rem;
    font-weight: 600;
}

.ring-name {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.ring-books-label .ring-value {
    color: var(--ring-books);
}

.ring-time-label .ring-value {
    color: var(--ring-time);
}

.ring-vocab-label .ring-value {
    color: var(--ring-vocab);
}

.stats-details {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.stats-section {
    background: var(--bg-secondary);
    padding: 1.25rem;
    border-radius: 12px;
}

.stats-section h4 {
    font-size: 0.9rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.genre-chart {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.genre-chip {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-card);
    border-radius: 50px;
    font-size: 0.8rem;
}

.genre-chip-color {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.week-chart {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    height: 80px;
    gap: 8px;
}

.week-bar {
    flex: 1;
    background: var(--accent-light);
    border-radius: 4px 4px 0 0;
    transition: height 0.3s;
    position: relative;
    min-height: 4px;
}

.week-bar.active {
    background: var(--accent);
}

.week-bar-label {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.65rem;
    color: var(--text-secondary);
}

/* Profile */
.profile-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--accent-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.profile-avatar svg {
    width: 40px;
    height: 40px;
    color: var(--accent);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 1rem;
    color: var(--text-primary);
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
}

/* Vocabulary */
/* Vocabulary Add Form */
.vocab-add-form {
    background: var(--bg-card);
    padding: 1.25rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
}

.vocab-add-form h3 {
    margin: 0 0 1rem 0;
    font-size: 1rem;
    color: var(--accent);
}

.vocab-form-row {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.vocab-form-row input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.95rem;
}

.vocab-form-row input:focus {
    outline: none;
    border-color: var(--accent);
}

.vocab-note {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
    margin: 0.5rem 0;
    padding-left: 0.75rem;
    border-left: 2px solid var(--accent);
}

@media (max-width: 600px) {
    .vocab-form-row {
        flex-direction: column;
    }
}

.vocab-stats {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 12px;
}

.vocab-stat {
    text-align: center;
}

.vocab-stat-value {
    display: block;
    font-family: 'Playfair Display', serif;
    font-size: 2rem;
    color: var(--accent);
}

.vocab-stat span:last-child {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.vocab-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 400px;
    overflow-y: auto;
}

.vocab-card {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: 10px;
}

.vocab-word {
    font-family: 'Playfair Display', serif;
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.vocab-def {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.vocab-source {
    font-size: 0.75rem;
    color: var(--accent);
    margin-top: 0.5rem;
}

/* Reader */
.reader-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 2000;
    display: none;
    flex-direction: column;
}

.reader-overlay.active {
    display: flex;
}

.reader-header {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--accent);
    gap: 1rem;
}

.reader-header> :last-child {
    justify-self: end;
}

.reader-title {
    font-family: 'Playfair Display', serif;
    font-size: 1.1rem;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
    font-weight: 600;
}

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

.zoom-controls {
    display: flex;
    gap: 0.25rem;
    align-items: center;
    background: var(--bg-card);
    padding: 2px;
    border-radius: 8px;
    border: 1px solid var(--border);
    margin: 0 0.5rem;
}

.zoom-controls .icon-btn {
    border: none;
    width: 32px;
    height: 32px;
    font-size: 0.75rem;
}

.icon-btn svg {
    width: 20px;
    height: 20px;
}

.reader-content {
    flex: 1;
    overflow-y: auto !important;
    overflow-x: hidden;
    padding: 2rem 80px;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: all 0.3s ease;
}

.immersive-exit {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2600;
    background: rgba(0, 0, 0, 0.4);
    color: #fff;
    border: none;
    padding: 10px 15px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.8rem;
    display: none;
    backdrop-filter: blur(5px);
}

.immersive-mode .immersive-exit {
    display: block;
}

.immersive-mode .reader-header,
.immersive-mode .reader-footer {
    display: none;
}

.immersive-mode .reader-content {
    padding: 0;
    background: #000;
}

.nav-arrow {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
    height: 100px;
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    border: none;
    color: #fff;
    cursor: pointer;
    z-index: 2500;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    border-radius: 0 12px 12px 0;
}

.nav-arrow.next {
    right: 0;
    border-radius: 12px 0 0 12px;
}

.nav-arrow.prev {
    left: 0;
}

.nav-arrow:hover {
    background: rgba(201, 169, 98, 0.6);
    width: 70px;
}

.nav-arrow:disabled {
    opacity: 0;
    pointer-events: none;
}

.nav-arrow svg {
    width: 32px;
    height: 32px;
}

/* Smaller arrows in fullscreen/immersive mode */
.immersive-mode .nav-arrow {
    width: 40px;
    height: 60px;
    opacity: 0.3;
}

.immersive-mode .nav-arrow:hover {
    width: 50px;
    opacity: 0.8;
}

.immersive-mode .nav-arrow svg {
    width: 20px;
    height: 20px;
}

/* Tablet and iPad responsive styles */
@media (max-width: 1024px) and (pointer: coarse) {
    .nav-arrow {
        width: 50px;
        height: 80px;
    }

    .nav-arrow svg {
        width: 24px;
        height: 24px;
    }

    .immersive-mode .nav-arrow {
        width: 35px;
        height: 50px;
    }

    .immersive-mode .nav-arrow svg {
        width: 18px;
        height: 18px;
    }

    .reader-footer {
        padding: 0.75rem 1.5rem;
    }

    .pagination-info {
        font-size: 0.9rem;
    }
}

/* Enable pinch-to-zoom on touch devices */
.reader-content {
    touch-action: pan-x pan-y pinch-zoom;
    -webkit-overflow-scrolling: touch;
}

.immersive-mode .reader-content {
    touch-action: pinch-zoom pan-x pan-y;
}

.pdf-container,
.epub-container,
.image-container,
.text-content {
    touch-action: pinch-zoom pan-x pan-y;
}


.reader-content.scrollable {
    overflow-y: auto !important;
}

.reader-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 3rem;
    background: var(--bg-secondary);
    border-top: 2px solid var(--accent);
    gap: 2rem;
}

.pagination-info {
    flex: 1;
    display: flex;
    justify-content: center;
}

.progress-indicator {
    flex: 1;
    max-width: 300px;
}

.progress-bar-mini {
    height: 6px;
    background: var(--bg-card);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}

.progress-bar-mini::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: var(--progress, 0%);
    background: linear-gradient(90deg, var(--accent), var(--accent-hover));
    border-radius: 3px;
    transition: width 0.05s linear;
    /* Near-instant sync */
}

/* EPUB Fixes */
.epub-container {
    width: 100% !important;
    height: 100% !important;
    max-width: 1100px;
    margin: 0 auto;
    background: #fff;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.1);
}

.immersive-mode .epub-container {
    max-width: 100vw;
}

.reader-content img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}


/* TOC */
.toc-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toc-item {
    padding: 1rem 1.25rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.95rem;
    border: 1px solid transparent;
    color: var(--text-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.toc-item:hover {
    background: var(--accent-light);
    border-color: var(--accent);
    transform: translateX(5px);
}

.toc-item.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.toc-item .page-num {
    font-size: 0.8rem;
    opacity: 0.7;
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 1rem 1.5rem;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: toastIn 0.3s ease;
    border-left: 3px solid var(--accent);
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(100%)
    }

    to {
        opacity: 1;
        transform: translateX(0)
    }
}

.toast.success {
    border-left-color: #27ae60;
}

.toast.error {
    border-left-color: var(--danger);
}

/* Empty State */
.empty-state {
    grid-column: 1/-1;
    text-align: center;
    padding: 4rem;
    color: var(--text-secondary);
}

.empty-state svg {
    width: 80px;
    height: 80px;
    opacity: 0.3;
    margin-bottom: 1rem;
}

.empty-state p {
    font-size: 1.1rem;
}

.empty-state .hint {
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* Responsive */
@media (max-width: 768px) {
    .main-content {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-stats {
        gap: 1.5rem;
    }

    .stat-value {
        font-size: 1.8rem;
    }

    .library-grid {
        grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
        gap: 1rem;
    }

    .app-header {
        padding: 0.75rem 1rem;
    }

    .btn-primary span {
        display: none;
    }

    .header-actions {
        gap: 0.25rem;
    }

    .icon-btn {
        width: 40px;
        height: 40px;
    }

    .modal {
        margin: 1rem;
        border-radius: 16px;
    }

    .reader-header,
    .reader-footer {
        padding: 0.75rem 1rem;
    }

    .genre-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .rings-labels {
        flex-direction: column;
        gap: 0.5rem;
    }
}

.share-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.75rem;
    margin-top: 1.5rem;
    width: 100%;
}

.share-btn {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.share-btn:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    transform: translateY(-2px);
}

.share-btn svg {
    width: 20px;
    height: 20px;
}

.modal-close svg {
    width: 18px;
    height: 18px;
}

.modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
}