.cyber-theme {
    --primary: #00f3ff;
    --accent: #ff00ff;
    --status: #00ff88;
    --bg: #0a0a12;
    --bg-secondary: #0e0e1a;
    --panel: rgba(10, 10, 18, 0.92);
    --panel-glass: rgba(14, 14, 26, 0.85);
    --text: #e0e8ff;
    --text-secondary: #7a7fa8;
    --border: rgba(0, 243, 255, 0.15);
    --border-glow: rgba(0, 243, 255, 0.4);
    --shadow: rgba(0, 243, 255, 0.08);
    --shadow-accent: rgba(255, 0, 255, 0.08);
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: Consolas, Monaco, 'Courier New', monospace;
    height: 100vh;
    overflow: hidden;
}

.cyber-container {
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    background:
        linear-gradient(rgba(0, 243, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 243, 255, 0.03) 1px, transparent 1px),
        radial-gradient(ellipse at 15% 15%, rgba(0, 243, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 85% 85%, rgba(255, 0, 255, 0.06) 0%, transparent 50%),
        var(--bg);
    background-size: 40px 40px, 40px 40px, 100% 100%, 100% 100%, 100% 100%;
}

.cyber-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    background: var(--panel-glass);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-shrink: 0;
}

.header-left .cyber-title {
    margin: 0;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 2px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 10px;
    text-shadow: none;
}

.header-left .cyber-title i {
    -webkit-text-fill-color: var(--primary);
    filter: drop-shadow(0 0 6px rgba(0, 243, 255, 0.5));
}

.cyber-subtitle {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 2px;
    letter-spacing: 1px;
}

.cyber-stats {
    display: flex;
    gap: 16px;
    font-size: 13px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    background: rgba(0, 243, 255, 0.04);
    border-radius: 4px;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.stat-item:hover {
    border-color: var(--border-glow);
    box-shadow: 0 0 8px var(--shadow);
}

.stat-item i {
    color: var(--primary);
    filter: drop-shadow(0 0 4px rgba(0, 243, 255, 0.4));
}

.main-content {
    flex: 1;
    display: flex;
    height: 100%;
    overflow: hidden;
}

.shelf-panel {
    flex-shrink: 0;
    width: 320px;
    overflow-y: auto;
    border-right: 1px solid var(--border);
    background: var(--panel-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    flex-direction: column;
}

.panel-header {
    padding: 14px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.search-box {
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 8px 12px;
    margin-bottom: 12px;
    transition: all 0.3s;
}

.search-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(0, 243, 255, 0.15), inset 0 0 8px rgba(0, 243, 255, 0.05);
}

.search-box i {
    color: var(--primary);
    margin-right: 8px;
    filter: drop-shadow(0 0 3px rgba(0, 243, 255, 0.4));
}

.search-box input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text);
    font-size: 13px;
    font-family: inherit;
    outline: none;
}

.search-box input::placeholder {
    color: var(--text-secondary);
}

.cyber-btn {
    background: linear-gradient(145deg, rgba(0, 243, 255, 0.08), rgba(255, 0, 255, 0.08));
    border: 1px solid var(--border);
    color: var(--text);
    padding: 7px 14px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    font-family: inherit;
    font-weight: 500;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.cyber-btn:hover {
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(0, 243, 255, 0.2);
    transform: translateY(-1px);
}

.cyber-btn:active {
    transform: translateY(0);
}

.cyber-btn.small {
    padding: 6px 10px;
    font-size: 12px;
}

.cyber-btn.accent {
    background: linear-gradient(145deg, var(--primary), var(--accent));
    color: var(--bg);
    border-color: transparent;
    font-weight: 700;
}

.cyber-btn.accent:hover {
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.3), 0 0 40px rgba(255, 0, 255, 0.15);
}

.cyber-btn.secondary {
    background: rgba(255, 0, 255, 0.08);
    border-color: rgba(255, 0, 255, 0.2);
}

.cyber-btn.secondary:hover {
    border-color: var(--accent);
    box-shadow: 0 0 12px rgba(255, 0, 255, 0.2);
}

.view-controls {
    display: flex;
    gap: 4px;
}

.view-btn {
    width: 30px;
    height: 30px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    font-size: 12px;
}

.view-btn:hover {
    border-color: var(--border-glow);
    color: var(--text);
}

.view-btn.active {
    background: var(--primary);
    color: var(--bg);
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(0, 243, 255, 0.3);
}

.books-container {
    flex: 1;
    overflow-y: auto;
    padding: 14px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 12px;
}

.book-card {
    background: linear-gradient(145deg, rgba(14, 14, 26, 0.9), rgba(10, 10, 18, 0.95));
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.book-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--primary), var(--accent));
    opacity: 0.6;
    transition: opacity 0.3s;
}

.book-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 243, 255, 0.12), 0 0 1px var(--primary);
}

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

.book-card.active {
    border-color: var(--accent);
    background: linear-gradient(145deg, rgba(40, 10, 40, 0.6), rgba(14, 14, 26, 0.9));
    box-shadow: 0 0 16px rgba(255, 0, 255, 0.15), inset 0 0 20px rgba(255, 0, 255, 0.03);
}

.book-card.active::before {
    background: linear-gradient(to bottom, var(--accent), var(--primary));
    opacity: 1;
}

.book-title {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 4px;
    line-height: 1.3;
    color: var(--text);
}

.book-author {
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.book-meta {
    font-size: 10px;
    color: var(--primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-footer {
    padding: 10px 14px;
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}

.info-text {
    font-size: 11px;
    color: var(--text-secondary);
    text-align: center;
}

.reader-panel {
    flex: 1;
    min-width: 0;
    display: none;
    flex-direction: column;
    background: var(--panel);
}

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

.reader-header {
    padding: 14px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--panel-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-shrink: 0;
}

.reader-title h2 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 1px;
}

.reader-title .book-meta {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 3px;
}

.sep {
    margin: 0 8px;
    color: var(--border-glow);
}

.reader-controls {
    display: flex;
    gap: 8px;
}

.reader-content {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    padding: 16px 24px;
    overflow: hidden;
}

.content-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.font-controls,
.mode-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ctrl-btn {
    width: 30px;
    height: 30px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    font-size: 12px;
}

.ctrl-btn:hover {
    border-color: var(--primary);
    box-shadow: 0 0 8px rgba(0, 243, 255, 0.15);
    color: var(--primary);
}

.font-size-label {
    font-size: 13px;
    min-width: 40px;
    text-align: center;
    color: var(--primary);
}

.text-display {
    flex: 1;
    overflow-y: auto;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 24px;
    font-size: 16px;
    line-height: 1.8;
    color: var(--text);
    min-height: 0;
}

.text-display h3 {
    color: var(--primary);
    margin-bottom: 16px;
    font-size: 18px;
    letter-spacing: 1px;
    text-shadow: 0 0 8px rgba(0, 243, 255, 0.2);
}

.text-display .chapter-content {
    text-indent: 2em;
}

.text-display.night-mode {
    background: rgba(0, 0, 0, 0.6);
    color: #c8c8e0;
    border-color: rgba(255, 0, 255, 0.15);
}

.text-display.night-mode h3 {
    color: var(--accent);
    text-shadow: 0 0 8px rgba(255, 0, 255, 0.2);
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 16px;
    color: var(--primary);
    opacity: 0.4;
    filter: drop-shadow(0 0 10px rgba(0, 243, 255, 0.2));
}

.empty-state p {
    font-size: 14px;
}

.reader-footer {
    margin-top: 16px;
    flex-shrink: 0;
}

.navigation {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-btn {
    padding: 7px 14px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.3s;
    font-family: inherit;
    font-size: 13px;
    white-space: nowrap;
}

.nav-btn:hover {
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(0, 243, 255, 0.15);
    color: var(--primary);
}

.progress-info {
    flex: 1;
    min-width: 0;
}

.progress-bar {
    height: 4px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 6px;
    border: 1px solid rgba(0, 243, 255, 0.05);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    width: 0%;
    transition: width 0.4s ease;
    box-shadow: 0 0 8px rgba(0, 243, 255, 0.4);
}

.page-info {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--text-secondary);
}

.progress-percent {
    color: var(--primary);
    font-weight: 600;
}

.side-panel {
    position: fixed;
    top: 0;
    right: -340px;
    width: 300px;
    height: 100%;
    background: var(--panel-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-left: 1px solid var(--border);
    transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.4);
}

.side-panel.active {
    right: 0;
}

.side-header {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.side-header h3 {
    margin: 0;
    font-size: 15px;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.side-header h3 i {
    color: var(--primary);
    filter: drop-shadow(0 0 4px rgba(0, 243, 255, 0.4));
}

.close-panel {
    background: none;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.close-panel:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 8px rgba(255, 0, 255, 0.15);
}

.side-content {
    padding: 16px;
}

.setting-group {
    margin-bottom: 20px;
}

.setting-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 13px;
    color: var(--text);
}

.setting-group input[type="range"] {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 2px;
    -webkit-appearance: none;
    appearance: none;
    outline: none;
}

.setting-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 8px rgba(0, 243, 255, 0.4);
}

.setting-group input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 0 8px rgba(0, 243, 255, 0.4);
}

.switch {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.switch input {
    display: none;
}

.slider {
    width: 38px;
    height: 20px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    position: relative;
    transition: all 0.3s;
    border: 1px solid var(--border);
}

.slider::before {
    content: '';
    position: absolute;
    left: 2px;
    top: 2px;
    width: 14px;
    height: 14px;
    background: var(--text-secondary);
    border-radius: 50%;
    transition: all 0.3s;
}

.switch input:checked + .slider {
    background: rgba(0, 243, 255, 0.2);
    border-color: var(--primary);
}

.switch input:checked + .slider::before {
    transform: translateX(18px);
    background: var(--primary);
    box-shadow: 0 0 6px rgba(0, 243, 255, 0.5);
}

.switch-label {
    font-size: 13px;
    color: var(--text);
}

.cyber-error {
    padding: 10px 20px;
    background: rgba(255, 0, 80, 0.15);
    border-bottom: 1px solid rgba(255, 0, 80, 0.3);
    color: #ff5080;
    font-size: 13px;
    text-align: center;
}

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(to bottom, var(--primary), var(--accent));
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(to bottom, var(--accent), var(--primary));
}

::selection {
    background: rgba(0, 243, 255, 0.25);
    color: var(--text);
}

@media (max-width: 992px) {
    .cyber-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        padding: 10px 16px;
    }

    .cyber-stats {
        width: 100%;
        justify-content: space-between;
    }

    .main-content {
        flex-direction: column;
    }

    .shelf-panel {
        width: 100%;
        flex-shrink: 1;
        border-right: none;
        border-bottom: 1px solid var(--border);
        max-height: 40vh;
    }

    .reader-panel.active {
        flex: 1;
        min-height: 0;
    }

    .reader-header {
        flex-wrap: wrap;
        gap: 10px;
    }

    .reader-controls {
        flex-wrap: wrap;
    }

    .content-controls {
        flex-wrap: wrap;
        gap: 10px;
    }

    .side-panel {
        width: 280px;
        right: -300px;
    }
}

@media (max-width: 768px) {
    .cyber-header {
        padding: 8px 12px;
        gap: 8px;
    }

    .header-left .cyber-title {
        font-size: 18px;
    }

    .cyber-subtitle {
        font-size: 10px;
    }

    .cyber-stats {
        gap: 8px;
        font-size: 12px;
    }

    .stat-item {
        padding: 4px 8px;
        font-size: 11px;
    }

    .shelf-panel {
        max-height: 35vh;
    }

    .panel-header {
        padding: 10px;
    }

    .search-box {
        padding: 6px 10px;
        margin-bottom: 10px;
    }

    .search-box input {
        font-size: 12px;
    }

    .view-controls {
        gap: 3px;
    }

    .view-btn {
        width: 26px;
        height: 26px;
        font-size: 11px;
    }

    .books-container {
        padding: 10px;
        grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
        gap: 8px;
    }

    .book-card {
        padding: 10px;
    }

    .book-title {
        font-size: 12px;
    }

    .book-author {
        font-size: 10px;
    }

    .book-meta {
        font-size: 9px;
    }

    .reader-header {
        padding: 10px 14px;
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .reader-title h2 {
        font-size: 15px;
    }

    .reader-controls {
        width: 100%;
        gap: 6px;
    }

    .reader-content {
        padding: 10px 14px;
    }

    .content-controls {
        margin-bottom: 12px;
        padding-bottom: 10px;
    }

    .ctrl-btn {
        width: 28px;
        height: 28px;
    }

    .font-size-label {
        font-size: 12px;
        min-width: 35px;
    }

    .text-display {
        padding: 14px;
        font-size: 14px;
        line-height: 1.7;
    }

    .empty-state i {
        font-size: 36px;
    }

    .empty-state p {
        font-size: 12px;
    }

    .navigation {
        gap: 10px;
    }

    .nav-btn {
        padding: 6px 10px;
        font-size: 12px;
    }

    .page-info {
        font-size: 10px;
    }

    .side-panel {
        width: 260px;
        right: -280px;
    }

    .side-header {
        padding: 10px 12px;
    }

    .side-header h3 {
        font-size: 13px;
    }

    .side-content {
        padding: 12px;
    }

    .setting-group label {
        font-size: 12px;
    }

    .cyber-btn {
        padding: 5px 10px;
        font-size: 11px;
    }

    .cyber-btn.small {
        padding: 4px 8px;
        font-size: 10px;
    }
}

@media (max-width: 480px) {
    .cyber-header {
        padding: 6px 8px;
        gap: 6px;
    }

    .header-left .cyber-title {
        font-size: 16px;
        gap: 6px;
    }

    .cyber-subtitle {
        font-size: 9px;
    }

    .cyber-stats {
        gap: 4px;
        font-size: 10px;
    }

    .stat-item {
        padding: 3px 6px;
        gap: 3px;
        font-size: 10px;
    }

    .shelf-panel {
        max-height: 30vh;
    }

    .panel-header {
        padding: 8px;
    }

    .search-box {
        padding: 5px 8px;
        margin-bottom: 8px;
    }

    .search-box i {
        margin-right: 6px;
        font-size: 11px;
    }

    .search-box input {
        font-size: 11px;
    }

    .view-btn {
        width: 24px;
        height: 24px;
        font-size: 10px;
    }

    .books-container {
        padding: 6px;
        grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
        gap: 6px;
    }

    .book-card {
        padding: 8px;
        border-radius: 6px;
    }

    .book-card::before {
        width: 2px;
    }

    .book-title {
        font-size: 11px;
    }

    .book-author {
        font-size: 9px;
        margin-bottom: 4px;
    }

    .book-meta {
        font-size: 8px;
    }

    .reader-header {
        padding: 8px 10px;
    }

    .reader-title h2 {
        font-size: 13px;
    }

    .reader-content {
        padding: 8px 10px;
    }

    .content-controls {
        margin-bottom: 8px;
        padding-bottom: 8px;
        gap: 8px;
    }

    .font-controls,
    .mode-controls {
        gap: 5px;
    }

    .ctrl-btn {
        width: 26px;
        height: 26px;
        font-size: 10px;
    }

    .font-size-label {
        font-size: 10px;
        min-width: 30px;
    }

    .text-display {
        padding: 10px;
        font-size: 13px;
        line-height: 1.6;
    }

    .text-display h3 {
        font-size: 15px;
    }

    .empty-state i {
        font-size: 28px;
        margin-bottom: 8px;
    }

    .empty-state p {
        font-size: 11px;
    }

    .reader-footer {
        margin-top: 8px;
    }

    .navigation {
        flex-wrap: wrap;
        gap: 6px;
    }

    .nav-btn {
        flex: 1;
        min-width: 80px;
        justify-content: center;
        padding: 5px 8px;
        font-size: 11px;
    }

    .progress-info {
        width: 100%;
        order: -1;
    }

    .progress-bar {
        height: 3px;
    }

    .page-info {
        font-size: 9px;
    }

    .side-panel {
        width: 100%;
        right: -110%;
    }

    .side-panel.active {
        right: 0;
    }

    .side-header {
        padding: 10px;
    }

    .side-header h3 {
        font-size: 13px;
    }

    .close-panel {
        width: 26px;
        height: 26px;
        font-size: 12px;
    }

    .side-content {
        padding: 10px;
    }

    .setting-group {
        margin-bottom: 14px;
    }

    .setting-group label {
        font-size: 11px;
        margin-bottom: 6px;
    }

    .slider {
        width: 34px;
        height: 18px;
    }

    .slider::before {
        width: 12px;
        height: 12px;
    }

    .switch input:checked + .slider::before {
        transform: translateX(16px);
    }

    .switch-label {
        font-size: 11px;
    }

    .cyber-btn {
        padding: 4px 8px;
        font-size: 10px;
        gap: 4px;
    }

    .cyber-btn.small {
        padding: 3px 6px;
        font-size: 9px;
    }

    ::-webkit-scrollbar {
        width: 4px;
    }
}