/**
 * Colnaghi Foundation - Journal Viewer
 * Spectacular magazine-style PDF viewer
 */

:root {
    --viewer-bg: #0a0a0a;
    --viewer-surface: #151515;
    --viewer-border: rgba(255, 255, 255, 0.1);
    --viewer-text: #ffffff;
    --viewer-text-muted: rgba(255, 255, 255, 0.5);
    --viewer-accent: #ffffff;
    --viewer-shadow: rgba(0, 0, 0, 0.8);
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'EB Garamond', Georgia, serif;
    
    --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out-expo: cubic-bezier(0.87, 0, 0.13, 1);
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-sans);
    background: var(--viewer-bg);
    color: var(--viewer-text);
    -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   LOADER
   ========================================================================== */

.loader {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--viewer-bg);
    transition: opacity 0.8s var(--ease-out-expo), visibility 0.8s;
}

.loader.loaded {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader__content {
    text-align: center;
}

.loader__spinner {
    width: 48px;
    height: 48px;
    border: 1px solid var(--viewer-border);
    border-top-color: var(--viewer-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 24px;
}

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

.loader__text {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    letter-spacing: 0.05em;
    margin-bottom: 24px;
    color: var(--viewer-text-muted);
}

.loader__progress {
    width: 200px;
    height: 2px;
    background: var(--viewer-border);
    border-radius: 1px;
    overflow: hidden;
}

.loader__progress-bar {
    height: 100%;
    width: 0%;
    background: var(--viewer-accent);
    transition: width 0.3s var(--ease-smooth);
}

/* ==========================================================================
   VIEWER STRUCTURE
   ========================================================================== */

.viewer {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    background: var(--viewer-bg);
}

/* ==========================================================================
   HEADER
   ========================================================================== */

.viewer-header {
    position: relative;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    background: linear-gradient(to bottom, var(--viewer-bg), transparent);
    transition: transform 0.4s var(--ease-smooth), opacity 0.4s var(--ease-smooth);
}

.viewer-header.hidden {
    transform: translateY(-100%);
    opacity: 0;
}

.viewer-header__back {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--viewer-text);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: opacity 0.3s;
}

.viewer-header__back:hover {
    opacity: 0.6;
}

.viewer-header__back svg {
    transition: transform 0.3s var(--ease-smooth);
}

.viewer-header__back:hover svg {
    transform: translateX(-4px);
}

.viewer-header__title {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.viewer-header__journal-name {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.viewer-header__controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.viewer-header__zoom {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--viewer-text-muted);
    min-width: 48px;
    text-align: center;
}

.viewer-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid var(--viewer-border);
    border-radius: 8px;
    color: var(--viewer-text);
    cursor: pointer;
    transition: all 0.3s var(--ease-smooth);
}

.viewer-btn:hover {
    background: var(--viewer-surface);
    border-color: var(--viewer-text-muted);
}

/* ==========================================================================
   MAIN AREA
   ========================================================================== */

.viewer-main {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: auto;
}

/* ==========================================================================
   BOOK CONTAINER - 3D Magazine Effect
   ========================================================================== */

.book-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    transform-style: preserve-3d;
}

.book {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Single Page Display */
.page {
    background: #fff;
    box-shadow: 
        0 0 0 1px rgba(0,0,0,0.05),
        0 30px 60px -30px var(--viewer-shadow),
        0 50px 100px -50px rgba(0,0,0,0.5);
    overflow: hidden;
}

.page canvas {
    display: block;
}

/* Simple fade transition */
.page.fade-out {
    animation: fadeOut 0.25s ease-out forwards;
}

.page.fade-in {
    animation: fadeIn 0.25s ease-out forwards;
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Page shadow effect */
.page::after {
    content: '';
    position: absolute;
    top: 0;
    right: -20px;
    width: 20px;
    height: 100%;
    background: linear-gradient(to right, rgba(0,0,0,0.15), transparent);
    pointer-events: none;
}

/* ==========================================================================
   NAVIGATION ARROWS
   ========================================================================== */

.nav-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: var(--viewer-surface);
    border: 1px solid var(--viewer-border);
    border-radius: 50%;
    color: var(--viewer-text);
    cursor: pointer;
    transition: all 0.4s var(--ease-out-expo);
    opacity: 0;
}

.viewer-main:hover .nav-arrow {
    opacity: 1;
}

.nav-arrow:hover {
    background: var(--viewer-accent);
    color: var(--viewer-bg);
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 10px 40px rgba(255,255,255,0.2);
}

.nav-arrow:active {
    transform: translateY(-50%) scale(0.95);
}

.nav-arrow--prev {
    left: 24px;
}

.nav-arrow--next {
    right: 24px;
}

.nav-arrow:disabled {
    opacity: 0.2 !important;
    cursor: not-allowed;
    transform: translateY(-50%) scale(1);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.viewer-footer {
    position: relative;
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 16px 24px;
    background: linear-gradient(to top, var(--viewer-bg), transparent);
    transition: transform 0.4s var(--ease-smooth), opacity 0.4s var(--ease-smooth);
}

.viewer-footer.hidden {
    transform: translateY(100%);
    opacity: 0;
}

.viewer-footer__pages {
    font-family: var(--font-serif);
    font-size: 0.875rem;
    color: var(--viewer-text-muted);
    min-width: 60px;
}

.viewer-footer__pages #currentPage {
    color: var(--viewer-text);
    font-weight: 500;
}

.viewer-footer__timeline {
    flex: 1;
}

.timeline {
    position: relative;
    height: 4px;
    background: var(--viewer-border);
    border-radius: 2px;
    cursor: pointer;
}

.timeline__progress {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: var(--viewer-accent);
    border-radius: 2px;
    transition: width 0.3s var(--ease-smooth);
}

.timeline__thumb {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 16px;
    height: 16px;
    background: var(--viewer-accent);
    border-radius: 50%;
    box-shadow: 0 2px 8px var(--viewer-shadow);
    transition: transform 0.2s var(--ease-smooth);
    pointer-events: none;
}

.timeline:hover .timeline__thumb {
    transform: translate(-50%, -50%) scale(1);
}

/* ==========================================================================
   THUMBNAILS PANEL
   ========================================================================== */

.thumbnails-panel {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 320px;
    background: var(--viewer-surface);
    border-left: 1px solid var(--viewer-border);
    z-index: 200;
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform 0.5s var(--ease-out-expo);
}

.thumbnails-panel.open {
    transform: translateX(0);
}

.thumbnails-panel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--viewer-border);
}

.thumbnails-panel__header h3 {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0.05em;
}

.thumbnails-panel__close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    color: var(--viewer-text);
    cursor: pointer;
    transition: opacity 0.3s;
}

.thumbnails-panel__close:hover {
    opacity: 0.5;
}

.thumbnails-grid {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    align-content: start;
}

.thumbnail {
    position: relative;
    background: var(--viewer-bg);
    border: 1px solid var(--viewer-border);
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s var(--ease-smooth);
    min-height: 180px;
}

.thumbnail:hover {
    border-color: var(--viewer-text-muted);
    transform: scale(1.02);
}

.thumbnail.active {
    border-color: var(--viewer-accent);
    box-shadow: 0 0 0 2px var(--viewer-accent);
}

.thumbnail canvas {
    display: block;
    width: 100%;
    height: auto;
}

.thumbnail__number {
    position: absolute;
    bottom: 8px;
    right: 8px;
    font-size: 0.75rem;
    font-weight: 500;
    background: var(--viewer-bg);
    color: var(--viewer-text);
    padding: 2px 8px;
    border-radius: 4px;
}

/* ==========================================================================
   PAGE TURN OVERLAY
   ========================================================================== */

.page-turn-overlay {
    position: fixed;
    inset: 0;
    z-index: 150;
    pointer-events: none;
    perspective: 2000px;
    display: none;
}

.page-turn-overlay.active {
    display: block;
}

.page-turn-overlay__page {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50vw;
    height: 70vh;
    background: #fff;
    transform-origin: left center;
    box-shadow: 
        -5px 0 30px rgba(0,0,0,0.3),
        inset 100px 0 80px -80px rgba(0,0,0,0.1);
}

/* ==========================================================================
   KEYBOARD HINTS
   ========================================================================== */

.keyboard-hints {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 24px;
    padding: 12px 24px;
    background: var(--viewer-surface);
    border: 1px solid var(--viewer-border);
    border-radius: 8px;
    font-size: 0.75rem;
    color: var(--viewer-text-muted);
    opacity: 0;
    transition: opacity 0.5s var(--ease-smooth);
    pointer-events: none;
    z-index: 50;
}

.keyboard-hints.visible {
    opacity: 1;
}

/* ==========================================================================
   ERROR STATE
   ========================================================================== */

.viewer-error {
    position: fixed;
    inset: 0;
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--viewer-bg);
}

.viewer-error__content {
    text-align: center;
    max-width: 400px;
    padding: 48px;
}

.viewer-error__content svg {
    margin-bottom: 24px;
    opacity: 0.5;
}

.viewer-error__content h2 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 12px;
}

.viewer-error__content p {
    color: var(--viewer-text-muted);
    margin-bottom: 32px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s var(--ease-smooth);
}

.btn--primary {
    background: var(--viewer-accent);
    color: var(--viewer-bg);
}

.btn--primary:hover {
    background: var(--viewer-text);
    transform: translateY(-2px);
}

/* ==========================================================================
   RESPONSIVE - MOBILE OPTIMIZATION
   ========================================================================== */

@media (max-width: 768px) {
    /* Full screen mobile layout */
    .viewer {
        position: fixed;
        inset: 0;
        overflow: hidden;
    }
    
    /* Compact header */
    .viewer-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        padding: 8px 12px;
        background: rgba(10, 10, 10, 0.95);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        z-index: 100;
        min-height: 50px;
    }
    
    .viewer-header__back {
        width: 36px;
        height: 36px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .viewer-header__back span {
        display: none;
    }
    
    .viewer-header__back svg {
        width: 20px;
        height: 20px;
    }
    
    .viewer-header__title {
        position: static;
        transform: none;
        flex: 1;
        text-align: center;
    }
    
    .viewer-header__journal-name {
        font-size: 0.8125rem;
        letter-spacing: 0.05em;
    }
    
    .viewer-header__controls {
        gap: 4px;
    }
    
    .viewer-header__controls .viewer-btn {
        width: 36px;
        height: 36px;
        border: none;
        background: transparent;
    }
    
    /* Zoom controls on mobile - keep visible for readability */
    .viewer-header__zoom {
        font-size: 11px;
        min-width: 40px;
    }
    
    /* Main viewing area - FULL SCREEN */
    .viewer-main {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden;
        touch-action: pan-y pinch-zoom;
        -webkit-overflow-scrolling: touch;
    }
    
    /* Book container full width */
    .book-container {
        width: 100%;
        height: 100%;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden;
    }
    
    .book {
        width: 100%;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden;
    }
    
    /* Page takes full width, maintains aspect ratio */
    .page {
        max-width: 100vw;
        max-height: 100vh;
        max-height: 100dvh; /* Dynamic viewport height for mobile browsers */
        width: auto;
        height: auto;
        box-shadow: none;
        margin: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        /* GPU acceleration for smooth transitions */
        transform: translateZ(0);
        -webkit-transform: translateZ(0);
        will-change: transform, opacity;
    }
    
    .page::after {
        display: none;
    }
    
    .page canvas {
        max-width: 100vw;
        max-height: 100vh;
        max-height: 100dvh;
        width: auto !important;
        height: auto !important;
        object-fit: contain;
        /* Crisp rendering on retina */
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
    
    /* Hide nav arrows on mobile - use tap zones instead */
    .nav-arrow {
        display: none !important;
    }
    
    /* Compact footer */
    .viewer-footer {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        padding: 10px 16px;
        padding-bottom: max(10px, env(safe-area-inset-bottom));
        background: rgba(10, 10, 10, 0.95);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        gap: 12px;
        z-index: 100;
        min-height: 54px;
    }
    
    .viewer-footer__pages {
        font-size: 0.75rem;
        min-width: 50px;
    }
    
    .viewer-footer__thumbnails-toggle .viewer-btn {
        width: 36px;
        height: 36px;
        border: none;
        background: transparent;
    }
    
    .timeline {
        height: 3px;
    }
    
    .timeline__thumb {
        width: 14px;
        height: 14px;
    }
    
    /* Thumbnails panel full screen on mobile */
    .thumbnails-panel {
        width: 100%;
        padding-top: env(safe-area-inset-top);
    }
    
    .thumbnail {
        width: 80px;
    }
    
    .keyboard-hints {
        display: none;
    }
    
    /* When UI is hidden, more space for content */
    .viewer-header.hidden,
    .viewer-footer.hidden {
        pointer-events: none;
    }
}

/* Extra small screens */
@media (max-width: 480px) {
    .viewer-header {
        padding: 6px 10px;
        min-height: 44px;
    }
    
    .viewer-header__back,
    .viewer-header__controls .viewer-btn {
        width: 32px;
        height: 32px;
    }
    
    .viewer-header__journal-name {
        font-size: 0.75rem;
    }
    
    .viewer-footer {
        padding: 8px 12px;
        padding-bottom: max(8px, env(safe-area-inset-bottom));
        gap: 10px;
        min-height: 48px;
    }
    
    .viewer-footer__pages {
        font-size: 0.6875rem;
        min-width: 40px;
    }
}

/* Landscape mode optimization */
@media (max-width: 900px) and (orientation: landscape) {
    .viewer-header {
        padding: 4px 12px;
        min-height: 40px;
    }
    
    .viewer-footer {
        padding: 4px 16px;
        padding-bottom: max(4px, env(safe-area-inset-bottom));
        min-height: 40px;
    }
    
    .viewer-header__back,
    .viewer-header__controls .viewer-btn,
    .viewer-footer__thumbnails-toggle .viewer-btn {
        width: 32px;
        height: 32px;
    }
    
    .page canvas {
        max-height: calc(100vh - 80px);
    }
}

/* ==========================================================================
   GESTURES & TOUCH
   ========================================================================== */

@media (pointer: coarse) {
    .nav-arrow {
        opacity: 0.7;
    }
    
    .viewer-main:hover .nav-arrow {
        opacity: 0.7;
    }
}

/* ==========================================================================
   FULLSCREEN MODE
   ========================================================================== */

.viewer.fullscreen .viewer-header,
.viewer.fullscreen .viewer-footer {
    opacity: 0;
    pointer-events: none;
}

.viewer.fullscreen:hover .viewer-header,
.viewer.fullscreen:hover .viewer-footer {
    opacity: 1;
    pointer-events: auto;
}

/* ==========================================================================
   ANIMATIONS
   ========================================================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.page {
    animation: fadeInUp 0.6s var(--ease-out-expo) both;
}

/* ==========================================================================
   READING MODE - MOBILE ONLY
   ========================================================================== */

/* Hide Reading Mode button on desktop */
.viewer-btn--mobile-only {
    display: none;
}

@media (max-width: 768px) {
    .viewer-btn--mobile-only {
        display: flex;
    }
}

/* Tap Zones for Mobile Navigation */
.tap-zones {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 10;
    pointer-events: none;
}

@media (max-width: 768px) {
    .tap-zones {
        display: flex;
        pointer-events: auto;
        /* Safe area adjustments */
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
    }
}

.tap-zone {
    flex: 1;
    cursor: pointer;
    position: relative;
}

.tap-zone--left {
    flex: 0 0 20%;
}

.tap-zone--center {
    flex: 0 0 60%;
}

.tap-zone--right {
    flex: 0 0 20%;
}

/* Visual tap indicators */
.tap-zone--left::before,
.tap-zone--right::before {
    content: '';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.tap-zone--left::before {
    left: 12px;
}

.tap-zone--right::before {
    right: 12px;
}

.tap-zone--left:active::before,
.tap-zone--right:active::before {
    opacity: 1;
}

/* Reading Mode Panel */
.reading-mode-panel {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: none;
}

@media (max-width: 768px) {
    .reading-mode-panel.open {
        display: block;
    }
}

.reading-mode-panel__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease;
}

.reading-mode-panel__content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: #1a1a1a;
    border-radius: 20px 20px 0 0;
    padding: 24px 20px 40px;
    max-height: 85vh;
    overflow-y: auto;
    animation: slideUpPanel 0.4s var(--ease-out-expo);
}

@keyframes slideUpPanel {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.reading-mode-panel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.reading-mode-panel__header h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 400;
    color: #ffffff;
}

.reading-mode-panel__close {
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: #ffffff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease;
}

.reading-mode-panel__close:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Reading Mode Sections */
.reading-mode-section {
    margin-bottom: 28px;
}

.reading-mode-section:last-child {
    margin-bottom: 0;
}

.reading-mode-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 14px;
}

/* Theme Options */
.theme-options {
    display: flex;
    gap: 12px;
}

.theme-option {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid transparent;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.theme-option:hover {
    background: rgba(255, 255, 255, 0.1);
}

.theme-option.active {
    border-color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}

.theme-option__preview {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.theme-option--light .theme-option__preview {
    background: #ffffff;
}

.theme-option--sepia .theme-option__preview {
    background: linear-gradient(135deg, #f4ecd8 0%, #e8dcc8 100%);
}

.theme-option--night .theme-option__preview {
    background: linear-gradient(135deg, #1a1a1a 0%, #0d0d0d 100%);
    border-color: rgba(255, 255, 255, 0.3);
}

.theme-option__name {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.7);
}

.theme-option.active .theme-option__name {
    color: #ffffff;
}

/* Brightness Slider */
.brightness-slider {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
}

.brightness-icon {
    color: rgba(255, 255, 255, 0.5);
    display: flex;
    align-items: center;
}

.brightness-slider input[type="range"] {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    outline: none;
}

.brightness-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    background: #ffffff;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.brightness-slider input[type="range"]::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: #ffffff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* Brightness Overlay */
.brightness-overlay {
    position: fixed;
    inset: 0;
    background: #000000;
    opacity: 0;
    pointer-events: none;
    z-index: 3;
    transition: opacity 0.3s ease;
}

/* View Mode Toggle */
.view-mode-options {
    display: flex;
    gap: 10px;
}

.view-mode-options--three {
    gap: 8px;
}

.view-mode-options--three .view-mode-btn {
    padding: 12px 8px;
}

.view-mode-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid transparent;
    border-radius: 12px;
    color: rgba(255, 255, 255, 0.6);
    cursor: pointer;
    transition: all 0.2s ease;
}

.view-mode-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.8);
}

.view-mode-btn.active {
    border-color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

.view-mode-btn svg {
    opacity: 0.7;
}

.view-mode-btn.active svg {
    opacity: 1;
}

.view-mode-btn span {
    font-size: 0.75rem;
    font-weight: 500;
}

/* Bookmark Button */
.bookmark-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 20px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    color: #ffffff;
    font-size: 0.9375rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.bookmark-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.25);
}

.bookmark-btn.bookmarked {
    background: rgba(255, 215, 0, 0.15);
    border-color: rgba(255, 215, 0, 0.4);
}

.bookmark-btn.bookmarked svg {
    fill: #ffd700;
    stroke: #ffd700;
}

/* Bookmarks List */
.bookmarks-list {
    margin-top: 12px;
    max-height: 150px;
    overflow-y: auto;
}

.bookmark-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: background 0.2s ease;
}

.bookmark-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

.bookmark-item__page {
    font-family: var(--font-serif);
    font-size: 1rem;
    color: #ffffff;
}

.bookmark-item__delete {
    width: 28px;
    height: 28px;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: rgba(255, 255, 255, 0.6);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.bookmark-item__delete:hover {
    background: rgba(255, 100, 100, 0.3);
    color: #ff6b6b;
}

/* Page Jump */
.page-jump {
    display: flex;
    gap: 10px;
}

.page-jump input {
    flex: 1;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    color: #ffffff;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s ease;
}

.page-jump input:focus {
    border-color: rgba(255, 255, 255, 0.4);
}

.page-jump input::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.page-jump-btn {
    padding: 12px 24px;
    background: #ffffff;
    border: none;
    border-radius: 10px;
    color: #000000;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.page-jump-btn:hover {
    opacity: 0.9;
}

.page-jump-btn:active {
    transform: scale(0.98);
}

/* ==========================================================================
   READING MODE THEMES
   ========================================================================== */

/* Sepia Theme */
.viewer--theme-sepia {
    --viewer-bg: #f4ecd8;
    --viewer-surface: #e8dcc8;
    --viewer-border: rgba(139, 119, 92, 0.2);
    --viewer-text: #5c4a32;
    --viewer-text-muted: rgba(92, 74, 50, 0.6);
}

.viewer--theme-sepia .viewer-header,
.viewer--theme-sepia .viewer-footer {
    background: rgba(228, 216, 192, 0.95);
}

.viewer--theme-sepia .viewer-btn,
.viewer--theme-sepia .nav-arrow {
    color: #5c4a32;
}

.viewer--theme-sepia .nav-arrow {
    background: rgba(228, 216, 192, 0.9);
}

.viewer--theme-sepia .book {
    filter: sepia(20%) saturate(90%);
}

.viewer--theme-sepia .timeline {
    background: rgba(139, 119, 92, 0.2);
}

.viewer--theme-sepia .timeline__progress {
    background: #8b775c;
}

/* Night Theme */
.viewer--theme-night {
    --viewer-bg: #0d0d0d;
    --viewer-surface: #1a1a1a;
    --viewer-border: rgba(255, 255, 255, 0.08);
    --viewer-text: #b0b0b0;
    --viewer-text-muted: rgba(176, 176, 176, 0.5);
}

.viewer--theme-night .viewer-header,
.viewer--theme-night .viewer-footer {
    background: rgba(13, 13, 13, 0.98);
}

.viewer--theme-night .book {
    filter: brightness(0.85) contrast(1.1);
}

/* ==========================================================================
   PAGE CURL ANIMATION (Enhanced for Mobile)
   ========================================================================== */

@media (max-width: 768px) {
    .page--curl-left {
        animation: pageCurlLeft 0.5s var(--ease-out-expo) forwards;
        transform-origin: left center;
    }
    
    .page--curl-right {
        animation: pageCurlRight 0.5s var(--ease-out-expo) forwards;
        transform-origin: right center;
    }
    
    @keyframes pageCurlLeft {
        0% {
            transform: perspective(1200px) rotateY(0deg);
            opacity: 1;
        }
        100% {
            transform: perspective(1200px) rotateY(90deg);
            opacity: 0;
        }
    }
    
    @keyframes pageCurlRight {
        0% {
            transform: perspective(1200px) rotateY(0deg);
            opacity: 1;
        }
        100% {
            transform: perspective(1200px) rotateY(-90deg);
            opacity: 0;
        }
    }
    
    .page--enter-left {
        animation: pageEnterLeft 0.5s var(--ease-out-expo) forwards;
    }
    
    .page--enter-right {
        animation: pageEnterRight 0.5s var(--ease-out-expo) forwards;
    }
    
    @keyframes pageEnterLeft {
        0% {
            transform: perspective(1200px) rotateY(-90deg);
            opacity: 0;
        }
        100% {
            transform: perspective(1200px) rotateY(0deg);
            opacity: 1;
        }
    }
    
    @keyframes pageEnterRight {
        0% {
            transform: perspective(1200px) rotateY(90deg);
            opacity: 0;
        }
        100% {
            transform: perspective(1200px) rotateY(0deg);
            opacity: 1;
        }
    }
}

/* Touch Feedback Indicators */
.tap-indicator {
    position: fixed;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%) scale(0);
    pointer-events: none;
    z-index: 100;
}

.tap-indicator.animate {
    animation: tapPulse 0.4s ease-out forwards;
}

@keyframes tapPulse {
    0% {
        transform: translate(-50%, -50%) scale(0);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(1.5);
        opacity: 0;
    }
}

/* Hide desktop controls on mobile reading mode */
@media (max-width: 768px) {
    .viewer--reading-mode .viewer-header__controls .viewer-btn:not(.viewer-btn--mobile-only) {
        display: none;
    }
    
    .viewer--reading-mode .viewer-header__zoom {
        display: none;
    }
}

/* ==========================================================================
   SCROLL VIEW MODE - Simple PDF Scrolling
   ========================================================================== */

.viewer--scroll-mode .viewer-main {
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
    transition: opacity 0.3s ease;
}

.viewer--scroll-mode .book-container {
    height: auto;
    min-height: 100%;
    align-items: flex-start;
    padding: 0;
}

.viewer--scroll-mode .book {
    flex-direction: column;
    align-items: center;
    height: auto;
    width: 100%;
    gap: 0;
}

.viewer--scroll-mode .page {
    margin: 0;
    box-shadow: none;
    max-width: 100%;
    max-height: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.viewer--scroll-mode .page:last-child {
    border-bottom: none;
}

.viewer--scroll-mode .page canvas {
    max-width: 100%;
    max-height: none;
    height: auto !important;
}

/* Hide page navigation in scroll mode */
.viewer--scroll-mode .tap-zones {
    display: none !important;
}

.viewer--scroll-mode .nav-arrow {
    display: none !important;
}

.viewer--scroll-mode .viewer-footer__timeline {
    display: none;
}

.viewer--scroll-mode .viewer-footer__pages {
    display: none;
}

/* Show scroll progress indicator instead */
.viewer--scroll-mode .scroll-progress {
    display: block;
}

.scroll-progress {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: rgba(255, 255, 255, 0.1);
    z-index: 150;
}

.scroll-progress__bar {
    height: 100%;
    background: #ffffff;
    width: 0%;
    transition: width 0.1s ease-out;
}

/* Loading indicator for scroll mode */
.scroll-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

.scroll-loading__spinner {
    width: 24px;
    height: 24px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-right: 12px;
}

/* Mobile optimizations for scroll mode */
@media (max-width: 768px) {
    .viewer--scroll-mode .viewer-main {
        padding-top: 64px;
        padding-bottom: 60px;
    }
    
    .viewer--scroll-mode .book {
        padding: 0;
    }
    
    .viewer--scroll-mode .page {
        width: 100%;
    }
    
    .viewer--scroll-mode .page canvas {
        width: 100% !important;
    }
    
    /* Simplified footer in scroll mode */
    .viewer--scroll-mode .viewer-footer {
        justify-content: center;
    }
    
    .viewer--scroll-mode .viewer-footer__thumbnails-toggle {
        display: none;
    }
}

/* Sepia theme for scroll mode */
.viewer--scroll-mode.viewer--theme-sepia .viewer-main {
    background: #f4ecd8;
}

.viewer--scroll-mode.viewer--theme-sepia .page {
    border-bottom-color: rgba(139, 119, 92, 0.2);
}

/* Night theme for scroll mode */
.viewer--scroll-mode.viewer--theme-night .viewer-main {
    background: #0d0d0d;
}

.viewer--scroll-mode.viewer--theme-night .page {
    border-bottom-color: rgba(255, 255, 255, 0.05);
}

/* ==========================================================================
   SINGLE PAGE MODE - Full screen single page with scroll snap
   ========================================================================== */

.viewer--single-mode .viewer-main {
    overflow-y: auto !important;
    overflow-x: hidden !important;
    scroll-snap-type: y mandatory;
    -webkit-overflow-scrolling: touch;
    transition: opacity 0.3s ease;
    background: var(--viewer-bg) !important;
}

.viewer--single-mode .book-container {
    height: auto !important;
    min-height: 100%;
    align-items: flex-start !important;
    padding: 0;
    overflow: visible !important;
}

.viewer--single-mode .book {
    display: block !important;
    width: 100% !important;
    height: auto !important;
    overflow: visible !important;
}

.viewer--single-mode .page {
    scroll-snap-align: start;
    scroll-snap-stop: always;
    min-height: 100vh;
    min-height: 100dvh;
    width: 100% !important;
    display: flex !important;
    align-items: center;
    justify-content: center;
    justify-content: center;
    box-shadow: none;
    margin: 0;
    padding: 0;
    background: var(--viewer-bg);
}

.viewer--single-mode .page canvas {
    max-width: 100%;
    max-height: 100vh;
    max-height: 100dvh;
    width: auto !important;
    height: auto !important;
    object-fit: contain;
}

/* Hide navigation in single mode - use swipe */
.viewer--single-mode .tap-zones {
    display: none !important;
}

.viewer--single-mode .nav-arrow {
    display: none !important;
}

/* Page indicator for single mode */
.viewer--single-mode .viewer-footer__timeline {
    display: none;
}

/* Show page counter in single mode */
.viewer--single-mode .viewer-footer__pages {
    display: block;
    font-size: 0.875rem;
}

/* Scroll progress for single mode */
.viewer--single-mode .scroll-progress {
    display: block;
}

/* Mobile optimizations for single mode */
@media (max-width: 768px) {
    .viewer--single-mode .viewer-main {
        padding-top: 54px !important;
        padding-bottom: 54px !important;
        overflow-y: auto !important;
        overflow-x: hidden !important;
        scroll-snap-type: y mandatory !important;
        display: block !important;
    }
    
    .viewer--single-mode .book-container {
        overflow: visible !important;
        height: auto !important;
        display: block !important;
        width: 100% !important;
    }
    
    .viewer--single-mode .book {
        display: flex !important;
        flex-direction: column !important;
        overflow: visible !important;
        height: auto !important;
        width: 100% !important;
        gap: 0 !important;
    }
    
    .viewer--single-mode .page {
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        justify-content: center !important;
        width: 100% !important;
        min-height: calc(100vh - 108px) !important;
        min-height: calc(100dvh - 108px) !important;
        height: calc(100vh - 108px) !important;
        height: calc(100dvh - 108px) !important;
        padding: 8px !important;
        scroll-snap-align: start !important;
        scroll-snap-stop: always !important;
        background: var(--viewer-bg) !important;
        box-sizing: border-box !important;
        flex-shrink: 0 !important;
        flex-grow: 0 !important;
    }
    
    .viewer--single-mode .page canvas {
        display: block !important;
        max-height: calc(100vh - 124px) !important;
        max-height: calc(100dvh - 124px) !important;
        max-width: calc(100vw - 16px) !important;
        width: auto !important;
        height: auto !important;
        margin: 0 auto !important;
        object-fit: contain !important;
    }
}

/* Sepia theme for single mode */
.viewer--single-mode.viewer--theme-sepia .page {
    background: #f4ecd8;
}

.viewer--single-mode.viewer--theme-sepia .viewer-main {
    background: #f4ecd8;
}

/* Night theme for single mode */
.viewer--single-mode.viewer--theme-night .page {
    background: #0d0d0d;
}

.viewer--single-mode.viewer--theme-night .viewer-main {
    background: #0d0d0d;
}

/* ==========================================================================
   REGISTRATION MODAL
   ========================================================================== */

.registration-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.registration-modal.open {
    display: flex;
}

.registration-modal__overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

.registration-modal__content {
    position: relative;
    background: #fff;
    border-radius: 8px;
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalSlideUp 0.3s ease-out;
}

@keyframes modalSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.registration-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid #eee;
}

.registration-modal__header h3 {
    font-family: 'EB Garamond', serif;
    font-size: 1.5rem;
    font-weight: 500;
    margin: 0;
    color: #000;
}

.registration-modal__close {
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: #666;
    transition: color 0.2s;
    margin: -0.5rem -0.5rem -0.5rem 0;
}

.registration-modal__close:hover {
    color: #000;
}

.registration-form {
    padding: 1.5rem;
}

.registration-form__intro {
    margin: 0 0 1.5rem;
    color: #666;
    line-height: 1.6;
    font-size: 0.9375rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: #333;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: 'Inter', sans-serif;
    font-size: 0.9375rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #000;
}

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

.form-group--checkbox label {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 400;
}

.form-group--checkbox input[type="checkbox"] {
    margin-top: 0.25rem;
    cursor: pointer;
}

.form-group--checkbox a {
    color: #000;
    text-decoration: underline;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-family: 'Inter', sans-serif;
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn--primary {
    background: #000;
    color: #fff;
}

.btn--primary:hover {
    background: #333;
}

.btn--secondary {
    background: #f5f5f5;
    color: #333;
}

.btn--secondary:hover {
    background: #e5e5e5;
}

.btn--full-width {
    width: 100%;
    margin-top: 0.5rem;
}

.btn--text {
    background: none;
    padding: 0.5rem;
    text-decoration: underline;
    color: #666;
    font-size: 0.875rem;
}

.btn--text:hover {
    color: #000;
}

/* ==========================================================================
   NOTES PANEL
   ========================================================================== */

.notes-panel {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: 500px;
    z-index: 9000;
    transform: translateX(100%);
    transition: transform 0.3s ease-out;
}

.notes-panel.open {
    transform: translateX(0);
}

.notes-panel__overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.notes-panel.open .notes-panel__overlay {
    opacity: 1;
    pointer-events: all;
}

.notes-panel__content {
    position: relative;
    height: 100%;
    background: #fff;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
}

.notes-panel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid #eee;
    flex-shrink: 0;
}

.notes-panel__header h3 {
    font-family: 'EB Garamond', serif;
    font-size: 1.5rem;
    font-weight: 500;
    margin: 0;
    color: #000;
}

.notes-panel__close {
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: #666;
    transition: color 0.2s;
    margin: -0.5rem -0.5rem -0.5rem 0;
}

.notes-panel__close:hover {
    color: #000;
}

.notes-panel__body {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.note-editor {
    background: #f9f9f9;
    border-radius: 8px;
    padding: 1.25rem;
    margin-bottom: 2rem;
}

.note-editor__page-info {
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
    color: #666;
    margin-bottom: 0.75rem;
}

.note-editor__page-info strong {
    color: #000;
}

#noteTextarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: 'Inter', sans-serif;
    font-size: 0.9375rem;
    line-height: 1.6;
    resize: vertical;
    min-height: 120px;
    margin-bottom: 0.75rem;
}

#noteTextarea:focus {
    outline: none;
    border-color: #000;
}

.note-editor__actions {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
}

.notes-list__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.notes-list__header h4 {
    font-family: 'EB Garamond', serif;
    font-size: 1.25rem;
    font-weight: 500;
    margin: 0;
}

.notes-list__items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.notes-list__empty {
    text-align: center;
    color: #999;
    padding: 2rem;
    font-size: 0.9375rem;
}

.note-item {
    background: #f9f9f9;
    border-radius: 6px;
    padding: 1rem;
    transition: background 0.2s;
}

.note-item:hover {
    background: #f0f0f0;
}

/* ==========================================================================
   BOOKMARKS PANEL
   ========================================================================== */

.bookmarks-panel {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: 400px;
    z-index: 9000;
    transform: translateX(100%);
    transition: transform 0.3s ease-out;
}

.bookmarks-panel.open {
    transform: translateX(0);
}

.bookmarks-panel__overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.bookmarks-panel.open .bookmarks-panel__overlay {
    opacity: 1;
    pointer-events: all;
}

.bookmarks-panel__content {
    position: relative;
    height: 100%;
    background: #fff;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
}

.bookmarks-panel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid #eee;
    flex-shrink: 0;
}

.bookmarks-panel__header h3 {
    font-family: 'EB Garamond', serif;
    font-size: 1.5rem;
    font-weight: 500;
    margin: 0;
    color: #000;
}

.bookmarks-panel__close {
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: #666;
    transition: color 0.2s;
    margin: -0.5rem -0.5rem -0.5rem 0;
}

.bookmarks-panel__close:hover {
    color: #000;
}

.bookmarks-panel__body {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.bookmarks-panel__current {
    margin-bottom: 2rem;
}

.bookmark-toggle button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.bookmarks-list-panel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.bookmarks-list-panel__header h4 {
    font-family: 'EB Garamond', serif;
    font-size: 1.25rem;
    font-weight: 500;
    margin: 0;
}

.bookmarks-list-panel__items {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.bookmarks-list-panel__empty {
    text-align: center;
    color: #999;
    padding: 2rem;
    font-size: 0.9375rem;
}

.bookmark-item {
    background: #f9f9f9;
    border-radius: 6px;
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: background 0.2s;
}

.bookmark-item:hover {
    background: #f0f0f0;
}

.bookmark-item__info {
    flex: 1;
}

.bookmark-item__page {
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
    font-weight: 600;
    color: #000;
    margin-bottom: 0.25rem;
}

.bookmark-item__date {
    font-size: 0.75rem;
    color: #999;
}

.bookmark-item__remove {
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: #999;
    transition: color 0.2s;
}

.bookmark-item__remove:hover {
    color: #f00;
}

.note-item__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.note-item__page {
    font-family: 'Inter', sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.note-item__actions {
    display: flex;
    gap: 0.5rem;
}

.note-item__btn {
    background: none;
    border: none;
    padding: 0.25rem;
    cursor: pointer;
    color: #999;
    transition: color 0.2s;
}

.note-item__btn:hover {
    color: #000;
}

.note-item__btn svg {
    width: 16px;
    height: 16px;
}

.note-item__text {
    font-family: 'Inter', sans-serif;
    font-size: 0.9375rem;
    line-height: 1.6;
    color: #333;
    white-space: pre-wrap;
    word-break: break-word;
}

.note-item__date {
    font-size: 0.75rem;
    color: #999;
    margin-top: 0.5rem;
}

/* Notes button in Reading Mode */
.notes-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    background: #f9f9f9;
    border: 1px solid #e5e5e5;
    border-radius: 6px;
    font-family: 'Inter', sans-serif;
    font-size: 0.9375rem;
    cursor: pointer;
    transition: all 0.2s;
}

.notes-btn:hover {
    background: #f0f0f0;
    border-color: #d5d5d5;
}

.notes-btn svg {
    flex-shrink: 0;
}

.notes-btn.has-notes {
    background: #fff7ed;
    border-color: #fed7aa;
}

.notes-btn.has-notes:hover {
    background: #ffedd5;
    border-color: #fdba74;
}

/* Mobile optimizations */
@media (max-width: 768px) {
    .notes-panel {
        max-width: 100%;
    }
    
    .registration-modal__content {
        max-height: 95vh;
        margin: auto 0.5rem;
    }
    
    /* Hide view mode options on mobile - always single page */
    .view-mode-options,
    .view-mode-options--three,
    #viewModePage,
    #viewModeSingle {
        display: none !important;
    }
    
    /* Hide the reading mode panel trigger on mobile */
    .reading-mode-toggle {
        display: none !important;
    }
}