/* Ebook Reader Styles - Paginated Reader */

/* CSS Variables for theming */
:root {
    --reader-bg: #fffef9;
    --reader-text: #2c2c2c;
    --reader-text-secondary: #666666;
    --reader-border: #e0e0e0;
    --reader-toolbar-bg: #fafafa;
    --reader-page-shadow: rgba(0, 0, 0, 0.08);
    --reader-accent: #4a90d9;
    --reader-accent-hover: #3a7bc8;
    --reader-nav-bg: rgba(0, 0, 0, 0.03);
    --reader-nav-hover: rgba(0, 0, 0, 0.08);
}

/* Theme: Light */
.reader-container[data-reader-theme="light"],
.reader-overlay[data-reader-theme="light"] {
    --reader-bg: #ffffff;
    --reader-text: #2c2c2c;
    --reader-text-secondary: #666666;
    --reader-border: #d0d0d0;
    --reader-toolbar-bg: #e8e8e8;
    --reader-page-shadow: rgba(0, 0, 0, 0.12);
    --reader-nav-bg: rgba(0, 0, 0, 0.03);
    --reader-nav-hover: rgba(0, 0, 0, 0.08);
    --reader-content-bg: #d8d8d8;
}

/* Theme: Dark */
.reader-container[data-reader-theme="dark"],
.reader-overlay[data-reader-theme="dark"] {
    --reader-bg: #2a2a2a;
    --reader-text: #e0e0e0;
    --reader-text-secondary: #999999;
    --reader-border: #3a3a3a;
    --reader-toolbar-bg: #1a1a1a;
    --reader-page-shadow: rgba(0, 0, 0, 0.4);
    --reader-nav-bg: rgba(255, 255, 255, 0.03);
    --reader-nav-hover: rgba(255, 255, 255, 0.08);
    --reader-content-bg: #121212;
}

/* Main Container - Standalone reader (full page) */
.reader-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background: var(--reader-bg);
    color: var(--reader-text);
    overflow: hidden;
    user-select: none;
}

/* Main Container - Overlay reader (modal) */
.reader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    display: none;
    flex-direction: column;
    background: var(--reader-bg);
    color: var(--reader-text);
    overflow: hidden;
    user-select: none;
}

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

/* Reader Toolbar */
.reader-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 24px;
    background: var(--reader-toolbar-bg);
    border-bottom: 1px solid var(--reader-border);
    flex-shrink: 0;
    z-index: 100;
}

.reader-toolbar-left,
.reader-toolbar-center,
.reader-toolbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.reader-toolbar-center {
    flex: 1;
    justify-content: center;
    flex-direction: column;
    gap: 2px;
}

.reader-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--reader-text);
    max-width: 500px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-align: center;
}

.reader-author {
    font-size: 13px;
    color: var(--reader-text-secondary);
    text-align: center;
}

/* Buttons */
.reader-btn {
    padding: 8px 14px;
    background: transparent;
    color: var(--reader-text);
    border: 1px solid var(--reader-border);
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.reader-btn:hover {
    background: var(--reader-nav-hover);
    border-color: var(--reader-accent);
}

.reader-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.reader-btn:disabled:hover {
    background: transparent;
    border-color: var(--reader-border);
}

.reader-btn-icon {
    font-size: 14px;
}

.reader-btn-primary {
    background: var(--reader-accent);
    color: white;
    border-color: var(--reader-accent);
}

.reader-btn-primary:hover {
    background: var(--reader-accent-hover);
    border-color: var(--reader-accent-hover);
}

/* Reader Settings */
.reader-settings {
    display: flex;
    align-items: center;
    gap: 16px;
}

.reader-setting-group {
    display: flex;
    align-items: center;
    gap: 6px;
}

.reader-setting-label {
    font-size: 12px;
    color: var(--reader-text-secondary);
    white-space: nowrap;
}

.reader-select {
    padding: 6px 10px;
    background: var(--reader-bg);
    color: var(--reader-text);
    border: 1px solid var(--reader-border);
    border-radius: 4px;
    font-size: 12px;
    cursor: pointer;
}

.reader-icon-btn {
    width: 30px;
    height: 30px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: var(--reader-text);
    border: 1px solid var(--reader-border);
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    transition: all 0.2s ease;
}

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

/* Layout Toggle Button */
.reader-layout-btn {
    width: auto;
    padding: 0 10px;
    gap: 6px;
}

.reader-layout-icon {
    font-size: 14px;
}

.reader-layout-label {
    font-size: 11px;
}

/* Main Reading Area */
.reader-main {
    flex: 1;
    display: flex;
    position: relative;
    overflow: hidden;
    background: var(--reader-content-bg);
}

/* Page Navigation Zones (invisible click areas) */
.reader-nav-zone {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 15%;
    min-width: 60px;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease;
}

.reader-nav-zone:hover {
    background: var(--reader-nav-hover);
}

.reader-nav-zone.disabled {
    cursor: default;
}

.reader-nav-zone.disabled:hover {
    background: transparent;
}

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

.reader-nav-next {
    right: 0;
}

.reader-nav-icon {
    font-size: 32px;
    color: var(--reader-text-secondary);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.reader-nav-zone:hover .reader-nav-icon {
    opacity: 0.6;
}

.reader-nav-zone.disabled .reader-nav-icon {
    opacity: 0 !important;
}

/* Page Content Area */
.reader-content {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 40px 5%;
    overflow: hidden;
}

/* Pages Wrapper - 90% of available width */
.reader-pages-wrapper {
    display: flex;
    gap: 0;
    width: 90%;
    height: 100%;
    justify-content: center;
}

/* The Page (book-like appearance) */
.reader-page {
    width: 100%;
    height: 100%;
    background: var(--reader-bg);
    box-shadow: 0 2px 20px var(--reader-page-shadow);
    border-radius: 2px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Single page layout (default) - single page takes full wrapper width */
.reader-content[data-layout="single"] .reader-pages-wrapper {
    width: 90%;
    max-width: 900px;
}

.reader-content[data-layout="single"] .reader-page-right {
    display: none;
}

.reader-content[data-layout="single"] .reader-page-left {
    border-radius: 2px;
    width: 100%;
}

/* Two page layout - both pages share the wrapper width */
.reader-content[data-layout="double"] .reader-pages-wrapper {
    width: 90%;
    max-width: 1400px;
}

.reader-content[data-layout="double"] .reader-page {
    width: 50%;
}

.reader-content[data-layout="double"] .reader-page-left {
    border-radius: 2px 0 0 2px;
    box-shadow: -2px 2px 20px var(--reader-page-shadow);
}

.reader-content[data-layout="double"] .reader-page-right {
    display: flex;
    border-radius: 0 2px 2px 0;
    box-shadow: 2px 2px 20px var(--reader-page-shadow);
}

/* Hide two-page layout on mobile/narrow screens */
@media (max-width: 1000px) {
    .reader-layout-toggle {
        display: none !important;
    }
    
    .reader-content[data-layout="double"] .reader-pages-wrapper {
        width: 90%;
        max-width: 900px;
    }
    
    .reader-content[data-layout="double"] .reader-page-right {
        display: none;
    }
    
    .reader-content[data-layout="double"] .reader-page-left {
        width: 100%;
        border-radius: 2px;
        box-shadow: 0 2px 20px var(--reader-page-shadow);
    }
}

.reader-page-content {
    flex: 1;
    padding: 48px 56px;
    overflow: hidden;
    column-fill: auto;
}

/* Typography */
.reader-page-content {
    color: var(--reader-text);
    text-align: justify;
    hyphens: auto;
    -webkit-hyphens: auto;
}

.reader-page-content h1,
.reader-page-content h2,
.reader-page-content h3 {
    color: var(--reader-text);
    margin-top: 0;
    margin-bottom: 0.8em;
    line-height: 1.3;
    text-align: left;
}

.reader-page-content h1 {
    font-size: 1.6em;
    font-weight: 600;
}

.reader-page-content h2 {
    font-size: 1.3em;
    font-weight: 600;
}

.reader-page-content h3 {
    font-size: 1.1em;
    font-weight: 600;
}

.reader-page-content p {
    margin: 0 0 1em 0;
    text-indent: 1.5em;
}

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

/* Columns-based pagination */
.reader-columns-wrapper {
    overflow: hidden;
}

.reader-columns-content {
    column-fill: auto;
}

.reader-columns-content p {
    margin: 0 0 1em 0;
    text-indent: 1.5em;
    break-inside: auto;
}

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

.reader-page-content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1em auto;
}

/* Reader Footer */
.reader-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    background: var(--reader-toolbar-bg);
    border-top: 1px solid var(--reader-border);
    flex-shrink: 0;
}

.reader-footer-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.reader-footer-center {
    display: flex;
    align-items: center;
    gap: 8px;
}

.reader-status {
    display: flex;
    align-items: center;
    gap: 12px;
}

.reader-chapter-info {
    font-size: 13px;
    color: var(--reader-text);
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.reader-status-separator {
    color: var(--reader-text-secondary);
    font-size: 10px;
}

.reader-footer-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.reader-progress {
    font-size: 12px;
    color: var(--reader-text-secondary);
}

/* Page Navigation Buttons */
.reader-page-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.reader-page-btn {
    width: 36px;
    height: 36px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: var(--reader-text);
    border: 1px solid var(--reader-border);
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    transition: all 0.2s ease;
}

.reader-page-btn:hover {
    background: var(--reader-accent);
    border-color: var(--reader-accent);
    color: white;
}

.reader-page-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.reader-page-btn:disabled:hover {
    background: transparent;
    border-color: var(--reader-border);
    color: var(--reader-text);
}

.reader-page-indicator {
    font-size: 13px;
    color: var(--reader-text-secondary);
    min-width: 80px;
    text-align: center;
}

/* Chapter Navigation */
.reader-chapter-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Loading State */
.reader-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    width: 100%;
    color: var(--reader-text-secondary);
}

.reader-loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--reader-border);
    border-top-color: var(--reader-accent);
    border-radius: 50%;
    animation: reader-spin 0.8s linear infinite;
    margin-bottom: 16px;
}

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

/* Font Size Classes */
.reader-page-content[data-font-size="small"] {
    font-size: 15px;
}

.reader-page-content[data-font-size="medium"] {
    font-size: 17px;
}

.reader-page-content[data-font-size="large"] {
    font-size: 19px;
}

.reader-page-content[data-font-size="xlarge"] {
    font-size: 21px;
}

/* Font Family Classes */
.reader-page-content[data-font-family="serif"] {
    font-family: 'Georgia', 'Times New Roman', 'Palatino Linotype', serif;
}

.reader-page-content[data-font-family="sans-serif"] {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
}

.reader-page-content[data-font-family="monospace"] {
    font-family: 'SF Mono', 'Consolas', 'Liberation Mono', Menlo, monospace;
}

/* Chapter Navigation Dropdown */
.reader-chapters-dropdown {
    position: relative;
}

.reader-chapters-menu {
    position: absolute;
    bottom: 100%;
    right: 0;
    margin-bottom: 8px;
    background: var(--reader-bg);
    border: 1px solid var(--reader-border);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    max-height: 400px;
    overflow-y: auto;
    min-width: 280px;
    z-index: 1000;
    display: none;
}

.reader-chapters-menu.active {
    display: block;
}

.reader-chapter-item {
    padding: 12px 16px;
    cursor: pointer;
    color: var(--reader-text);
    border-bottom: 1px solid var(--reader-border);
    transition: background-color 0.15s ease;
    font-size: 14px;
}

.reader-chapter-item:last-child {
    border-bottom: none;
}

.reader-chapter-item:hover {
    background: var(--reader-nav-hover);
}

.reader-chapter-item.active {
    background: var(--reader-accent);
    color: white;
}

.reader-chapter-number {
    font-size: 12px;
    color: var(--reader-text-secondary);
    margin-right: 8px;
    font-weight: 500;
}

.reader-chapter-item.active .reader-chapter-number {
    color: rgba(255, 255, 255, 0.8);
}

/* Mobile Settings Button - hidden on desktop */
.reader-mobile-settings-btn {
    display: none;
}

/* Mobile Settings Panel */
.reader-mobile-settings {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--reader-toolbar-bg);
    border-top: 1px solid var(--reader-border);
    padding: 16px;
    z-index: 10001;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.reader-mobile-settings.active {
    transform: translateY(0);
}

.reader-mobile-settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--reader-border);
}

.reader-mobile-settings-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--reader-text);
}

.reader-mobile-settings-close {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--reader-text);
    font-size: 20px;
    cursor: pointer;
    border-radius: 4px;
}

.reader-mobile-settings-close:hover {
    background: var(--reader-nav-hover);
}

.reader-mobile-setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--reader-border);
}

.reader-mobile-setting-row:last-child {
    border-bottom: none;
}

.reader-mobile-setting-label {
    font-size: 14px;
    color: var(--reader-text);
}

.reader-mobile-setting-control {
    display: flex;
    align-items: center;
    gap: 8px;
}

.reader-mobile-select {
    padding: 8px 12px;
    background: var(--reader-bg);
    color: var(--reader-text);
    border: 1px solid var(--reader-border);
    border-radius: 6px;
    font-size: 14px;
    min-width: 120px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .reader-container,
    .reader-overlay {
        height: 100%;
        height: 100dvh; /* Dynamic viewport height for mobile browsers */
    }

    .reader-toolbar {
        padding: 8px 12px;
        min-height: 44px;
        flex-shrink: 0;
    }

    /* Hide desktop settings on mobile, show mobile settings button */
    .reader-toolbar-right .reader-settings {
        display: none;
    }

    .reader-toolbar-right .reader-chapters-dropdown {
        display: none;
    }

    .reader-mobile-settings-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        background: transparent;
        border: 1px solid var(--reader-border);
        border-radius: 6px;
        color: var(--reader-text);
        font-size: 18px;
        cursor: pointer;
    }

    .reader-mobile-settings-btn:hover {
        background: var(--reader-nav-hover);
    }

    .reader-mobile-settings {
        display: block;
    }

    /* Hide nav zones on mobile - use swipe instead */
    .reader-nav-zone {
        display: none;
    }

    /* Adjust main content area */
    .reader-main {
        flex: 1;
        min-height: 0;
    }

    .reader-content {
        padding: 8px;
    }

    .reader-page-content {
        padding: 16px 12px;
    }

    .reader-title {
        font-size: 12px;
        max-width: 150px;
    }

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

    /* Mobile footer - two line layout */
    .reader-footer {
        padding: 8px 12px;
        flex-shrink: 0;
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    /* First line: chapter name centered */
    .reader-chapter-info {
        font-size: 12px;
        max-width: none;
        text-align: center;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .reader-status-separator {
        display: none;
    }

    /* Second line: buttons on sides, page nav centered */
    .reader-footer-left {
        position: absolute;
        left: 12px;
        bottom: 8px;
    }

    .reader-footer-right {
        position: absolute;
        right: 12px;
        bottom: 8px;
    }

    .reader-footer-center {
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 100%;
    }

    .reader-footer-center .reader-status {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 8px;
        width: 100%;
    }

    .reader-footer-center .reader-page-nav {
        display: flex;
        justify-content: center;
        align-items: center;
    }

    /* Hide text labels on mobile footer buttons */
    .reader-footer .reader-btn span:not(.reader-btn-icon) {
        display: none;
    }

    .reader-page-indicator {
        font-size: 12px;
        min-width: 80px;
        text-align: center;
    }

    .reader-footer {
        position: relative;
        min-height: 70px;
    }

    .reader-chapter-item {
        padding: 14px 16px;
    }

    /* Hide layout toggle on mobile */
    .reader-layout-toggle {
        display: none !important;
    }
}