/* ==========================================================================
   Reader - Text Pane, Navigation, Settings Modal
   ========================================================================== */

/* Reader pane (left) */
.reader-pane {
    flex: 0 0 55%;
    display: flex;
    flex-direction: column;
    background: #1a1a2e;
    border-right: 1px solid #0f3460;
    min-height: 0;
    min-width: 0;
}

.reader-text {
    flex: 1;
    padding: var(--reader-padding-y, 16px) var(--reader-padding-x, 24px);
    overflow-y: auto;
    font-family: 'Literata', Georgia, serif;
    font-size: 18px;
    line-height: 1.8;
    color: var(--reader-fg, #ddd);
    background: var(--reader-bg, #1a1a2e);
    white-space: pre-wrap;
    -webkit-overflow-scrolling: touch;
    transition: background 0.3s ease, color 0.3s ease;
}

.reader-text.has-epub {
    padding: 0;
    overflow: hidden;
    white-space: normal;
}

.epub-viewer {
    width: 100%;
    height: 100%;
    background: var(--reader-bg, #1a1a2e);
    box-sizing: border-box;
}

.reader-text.has-epub .epub-viewer {
    padding: var(--reader-padding-y, 16px) var(--reader-padding-x, 24px);
}

.epub-viewer iframe {
    border: 0;
    width: 100%;
    height: 100%;
}

.app.focus-mode .reader-text:not(.has-epub) {
    padding: calc(var(--reader-padding-y, 16px) + 8px)
        calc(var(--reader-padding-x, 24px) + 16px);
}

.app.focus-mode .reader-text.has-epub .epub-viewer {
    padding: var(--reader-padding-y, 16px)
        calc(var(--reader-padding-x, 24px) + 16px);
}

.app.focus-mode .nav-controls {
    display: none !important;
}

.app.focus-mode .reader-nav {
    padding: 6px 12px;
}

.reader-nav {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 8px 16px;
    background: #16213e;
    border-top: 1px solid #0f3460;
    flex-shrink: 0;
}

.nav-btn {
    background: #0f3460;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 15px;
    cursor: pointer;
    min-height: 40px;
    min-width: 70px;
    transition: background 0.2s;
}

.nav-btn:hover, .nav-btn:active {
    background: #1a4a7a;
}

.nav-btn:disabled {
    background: #333;
    color: #666;
    cursor: not-allowed;
}

.page-info {
    font-size: 14px;
    color: #888;
    min-width: 100px;
    text-align: center;
}

/* Settings button */
.settings-btn {
    background: #0f3460;
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    font-size: 18px;
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.settings-btn:hover, .settings-btn:active {
    background: #1a4a7a;
}

/* Settings panel (dropdown) */
.settings-panel {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #16213e;
    border: 1px solid #0f3460;
    border-radius: 12px;
    padding: 16px 20px;
    margin-bottom: 8px;
    min-width: 280px;
    max-height: 70vh;
    overflow-y: auto;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.4);
    z-index: 30;
}

.settings-panel.hidden {
    display: none;
}

.settings-panel h3 {
    font-size: 14px;
    font-weight: 600;
    color: #e94560;
    margin-bottom: 12px;
    text-align: center;
}

.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.setting-row:last-child {
    margin-bottom: 0;
}

.setting-label {
    font-size: 13px;
    color: #aaa;
}

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

.setting-btn {
    background: #0f3460;
    color: white;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.2s;
}

.setting-btn:hover, .setting-btn:active {
    background: #1a4a7a;
}

.setting-btn:disabled {
    background: #333;
    color: #666;
}

.setting-value {
    font-size: 13px;
    color: #ccc;
    min-width: 45px;
    text-align: center;
}

.setting-select {
    background: #0f3460;
    color: white;
    border: none;
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 13px;
}

.settings-divider {
    height: 1px;
    background: #0f3460;
    margin: 12px 0;
}

.settings-section-label {
    font-size: 11px;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

/* Theme variations */
.reader-text.theme-sepia {
    --reader-bg: #f4ecd8;
    --reader-fg: #5b4636;
}

.reader-text.theme-light {
    --reader-bg: #fafafa;
    --reader-fg: #222;
}

.reader-text.theme-dark {
    --reader-bg: #1a1a2e;
    --reader-fg: #ddd;
}

.reader-text p {
    margin-bottom: var(--para-spacing, 1em);
}

/* Theme button group */
.theme-buttons {
    display: flex;
    gap: 6px;
}

.theme-btn {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: border-color 0.2s, transform 0.1s;
}

.theme-btn:hover {
    transform: scale(1.1);
}

.theme-btn.active {
    border-color: #e94560;
}

.theme-btn.theme-dark-btn {
    background: #1a1a2e;
    border-color: #333;
}

.theme-btn.theme-dark-btn.active {
    border-color: #e94560;
}

.theme-btn.theme-sepia-btn {
    background: #f4ecd8;
}

.theme-btn.theme-light-btn {
    background: #fafafa;
}

/* Navigation controls row */
.nav-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 8px 16px;
    background: #16213e;
    border-bottom: 1px solid #0f3460;
}

.nav-control-group {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
}

.chapter-select {
    background: #0f3460;
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 13px;
    max-width: 200px;
}

.page-slider-group {
    flex: 1;
    max-width: 400px;
}

.page-slider {
    flex: 1;
    min-width: 120px;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: #0f3460;
    border-radius: 3px;
    cursor: pointer;
}

.page-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: #e94560;
    border-radius: 50%;
    cursor: pointer;
}

.page-slider:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.page-slider:disabled::-webkit-slider-thumb {
    background: #666;
}

.page-jump-btn {
    background: #0f3460;
    color: white;
    border: none;
    padding: 6px 8px;
    border-radius: 4px;
    font-size: 11px;
    cursor: pointer;
    min-width: 36px;
}

.page-jump-btn:hover:not(:disabled) {
    background: #1a4a7a;
}

.page-jump-btn:disabled {
    background: #333;
    color: #555;
    cursor: not-allowed;
}

/* ==========================================================================
   LLM Provider Comparison - Variant Badge
   ========================================================================== */

/* Badge overlay showing which LLM variant is displayed */
.variant-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    background: rgba(0, 0, 0, 0.75);
    color: #fff;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    z-index: 10;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

/* Ensure image container has position for badge placement */
.image-container {
    position: relative;
}

/* Small hint to make swipe discoverable */
.swipe-hint {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.65);
    color: #fff;
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 500;
    z-index: 10;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 1;
    transition: opacity 0.25s ease;
}

.swipe-hint.is-hidden {
    opacity: 0;
}

/* Carousel controls for variant navigation */
.image-info .carousel-btn {
    background: #0f3460;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s;
}

.image-info .carousel-btn:hover:not(:disabled) {
    background: #1a4a7a;
}

.image-info .carousel-btn:disabled {
    background: #333;
    color: #555;
    cursor: not-allowed;
}

.image-info .carousel-index {
    font-size: 12px;
    color: #aaa;
    min-width: 40px;
    text-align: center;
}