/* ============================================
   PDF -> Markdown — Stylesheet
   Uses shared theme.css design tokens
   app-header + sidebar + main layout
   ============================================ */

/* Default accent for PDF -> Markdown when no specific color-theme is set */
:root:not([data-color-theme]) {
    --accent: rgb(14, 165, 233);
    --accent-hover: rgb(2, 132, 199);
    --accent-muted: rgb(14, 40, 52);
    --accent-text: rgb(56, 189, 248);
}

@media (prefers-color-scheme: light) {
    :root:not([data-color-theme]) {
        --accent: rgb(2, 132, 199);
        --accent-hover: rgb(3, 105, 161);
        --accent-muted: rgb(224, 242, 254);
        --accent-text: rgb(3, 105, 161);
    }
}

/* ── Layout Shell ── */
body {
    margin: 0;
    background: var(--bg-root);
    color: var(--text-primary);
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.app-header-logo-pdf2md {
    background: linear-gradient(to bottom right, rgb(14, 165, 233), rgb(2, 132, 199));
}

.app-main {
    display: flex;
    flex: 1;
    min-height: 0;
    height: calc(100vh - 48px);
    overflow: hidden;
    position: relative;
}

#settings-sidebar {
    width: 280px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
    height: 100%;
}

#main-content {
    flex: 1;
    min-height: 0;
    height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--space-4) var(--space-6);
    display: flex;
    flex-direction: column;
    scroll-behavior: smooth;
    gap: var(--space-4);
}

/* ── Glassmorphism utility ── */
.glass {
    background: var(--bg-surface);
    border: 1px solid var(--border-default);
    box-shadow: var(--shadow-md);
}

/* Sidebar panel bodies - scrollable with padding */
.sidebar-panel-body {
    overflow-y: auto !important;
    padding: 4px 0;
}

/* ── Sidebar Settings ── */
.sidebar-settings-list {
    display: flex;
    flex-direction: column;
}

.sidebar-setting {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    padding: 8px 12px;
    cursor: pointer;
    transition: background var(--transition-fast);
    min-height: 48px;
    border-bottom: 1px solid var(--border-subtle);
}

.sidebar-setting:last-child {
    border-bottom: none;
}

.sidebar-setting:hover {
    background: var(--bg-surface-hover);
}

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

.sidebar-setting-label {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    font-weight: 500;
    display: block;
    line-height: 1.35;
    margin-bottom: 1px;
}

.sidebar-setting-desc {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    margin-top: 1px;
    display: block;
    line-height: 1.3;
}

.sidebar-select {
    background: var(--bg-surface-raised);
    border: 1px solid var(--border-default);
    color: var(--text-primary);
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    cursor: pointer;
    outline: none;
    font-family: var(--font-sans);
    width: 56px;
}

.sidebar-select:focus {
    border-color: var(--accent);
}

.sidebar-hf-list {
    display: flex;
    flex-direction: column;
}

.sidebar-hf-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    padding: 5px 12px;
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    min-height: 32px;
    border-bottom: 1px solid var(--border-subtle);
}

.sidebar-hf-item:last-child {
    border-bottom: none;
}

.sidebar-hf-item:hover {
    background: var(--bg-surface-hover);
}

.sidebar-hf-text {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ── Upload Area ── */
.upload-area {
    border: 2px dashed var(--border-default);
    border-radius: var(--radius-xl);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: auto;
    max-width: 600px;
    width: 100%;
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--accent);
    background: var(--accent-muted);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.upload-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.upload-text b {
    color: var(--accent);
}

#file-input {
    display: none;
}

/* ── File Info Bar ── */
.file-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        transform: translateY(10px);
    }
    to {
        transform: translateY(0);
    }
}

.file-details {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.file-icon {
    font-size: 1.5rem;
}

.file-name {
    font-weight: 600;
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-meta {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.badge {
    background: var(--accent-muted);
    color: var(--accent-text);
    padding: 0.25rem 0.75rem;
    border-radius: 99px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    border: 1px solid var(--border-subtle);
}

/* ── Toggle Switch ── */
.toggle {
    position: relative;
    width: 40px;
    height: 22px;
    flex-shrink: 0;
}

.toggle input {
    display: none;
}

.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--border-strong);
    border-radius: 22px;
    cursor: pointer;
    transition: background 0.25s;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    left: 3px;
    top: 3px;
    background: rgb(255, 255, 255);
    border-radius: 50%;
    transition: transform 0.25s;
}

.toggle input:checked+.toggle-slider {
    background: var(--accent);
}

.toggle input:checked+.toggle-slider::before {
    transform: translateX(18px);
}

/* ── Header/Footer Zone Badges ── */
.hf-zone-badge {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 1px 6px;
    border-radius: 3px;
    flex-shrink: 0;
}

.hf-zone-badge.header {
    background: var(--warning-muted);
    color: var(--warning);
}

.hf-zone-badge.footer {
    background: var(--danger-muted);
    color: var(--danger);
}

/* ── Preview Section (Main Page Cards) ── */
.preview-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    animation: fadeIn 0.4s ease;
    border-radius: var(--radius-lg);
    background: var(--bg-surface);
    border: 1px solid var(--border-default);
    padding: var(--space-3) var(--space-4);
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.preview-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2);
    cursor: pointer;
    user-select: none;
    padding: 2px 0;
}

.preview-section-header:hover .section-header-title h2 {
    color: var(--accent);
}

.preview-caret {
    transition: transform var(--transition-fast);
    color: var(--text-tertiary);
}

.preview-section.collapsed .preview-caret {
    transform: rotate(-90deg);
}

.preview-section.collapsed .preview-container {
    display: none;
}

.section-header-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.section-header-title h2 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.preview-status-badge {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

.preview-hint {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

.preview-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: var(--space-4);
    padding: var(--space-2) 0;
}

.page-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    background: var(--bg-surface);
    border: 1px solid var(--border-default);
    padding: var(--space-2);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: inherit;
    font-family: inherit;
    transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.page-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: var(--shadow-lg);
    background: var(--bg-surface-hover);
}

.page-card:active {
    transform: translateY(-1px);
}

.page-thumbnail-wrapper {
    background: #ffffff;
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-default);
    width: 100%;
    aspect-ratio: 1 / 1.414;
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-thumbnail-wrapper canvas {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.page-number-badge {
    background: var(--accent-muted);
    color: var(--accent-text);
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border: 1px solid var(--border-subtle);
    transition: all var(--transition-fast);
}

.page-card:hover .page-number-badge {
    background: var(--accent);
    color: #ffffff;
    border-color: var(--accent);
}

/* ── Progress Bar ── */
.progress-section {
    display: flex;
    flex-direction: column;
    margin-bottom: var(--space-4);
}

.progress-bar-wrap {
    width: 100%;
    height: 4px;
    background: var(--bg-surface-raised);
    border-radius: 99px;
    overflow: hidden;
    margin-bottom: var(--space-2);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-hover));
    border-radius: 99px;
    transition: width 0.3s ease;
    width: 0%;
}

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

.progress-inline {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

/* ── Output Section ── */
.output-section {
    display: flex;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    background: var(--bg-surface);
    border: 1px solid var(--border-default);
    box-shadow: var(--shadow-sm);
    animation: fadeIn 0.3s ease;
    flex-direction: column;
    gap: var(--space-3);
    min-height: 550px;
    flex: 1 0 auto;
}

.output-section.flex-grow {
    display: flex;
}

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-2);
    flex-wrap: wrap;
    gap: var(--space-2);
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--border-subtle);
}

.output-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.output-stats-inline {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

.download-btn {
    background: var(--success);
    color: rgb(0, 0, 0);
    border: none;
    padding: 8px 18px;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-sans);
}

.download-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--success-muted);
}

/* ── Iframe Markdown Preview ── */
.md-preview-iframe {
    display: none;
    width: 100%;
    height: 700px;
    min-height: 500px;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    background: var(--bg-surface);
}

.md-preview-iframe.visible {
    display: block;
}

/* ── Toast Notification ── */
.toast {
    display: none;
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-primary);
    background: var(--bg-surface-raised);
    border: 1px solid var(--border-default);
    padding: 10px 20px;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    z-index: 200;
    pointer-events: none;
    box-shadow: var(--shadow-lg);
}

.toast.toast-show {
    display: block;
}

/* ── Loading Spinner ── */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--accent-muted);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: inline-block;
}

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

/* ── Full-Page Preview Modal ── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    box-sizing: border-box;
}

@media (prefers-color-scheme: light) {
    .modal-overlay {
        background: rgba(0, 0, 0, 0.45);
    }
}

.modal-content {
    position: relative;
    width: 100%;
    height: 100%;
    max-width: 1200px;
    max-height: 92vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-surface);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    animation: fadeIn 0.25s ease-out;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--border-default);
    background: var(--bg-surface-raised);
    flex-shrink: 0;
    gap: var(--space-3);
}

.modal-page-info {
    display: flex;
    align-items: center;
    gap: 4px;
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    min-width: 90px;
}

.modal-page-total {
    color: var(--text-tertiary);
    font-weight: normal;
}

.modal-nav-controls,
.modal-zoom-controls {
    display: flex;
    align-items: center;
    gap: 4px;
}

.modal-zoom-badge {
    font-size: var(--font-size-xs);
    font-family: var(--font-mono);
    color: var(--text-secondary);
    background: var(--bg-root);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    padding: 3px 8px;
    min-width: 50px;
    text-align: center;
}

.modal-close-btn:hover {
    background: var(--danger);
    color: rgb(255, 255, 255);
}

.modal-viewport {
    flex: 1;
    overflow: auto;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: var(--space-6);
    background: var(--bg-root);
    cursor: grab;
    user-select: none;
    -webkit-user-select: none;
}

.modal-viewport.dragging {
    cursor: grabbing;
}

.modal-canvas-container {
    background: rgb(255, 255, 255);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-default);
    display: flex;
    align-items: center;
    justify-content: center;
    transform-origin: top center;
    transition: transform var(--transition-fast);
    margin: auto;
}

.modal-canvas-container canvas {
    display: block;
    max-width: none;
}

/* ── Mobile Sidebar Overlay ── */
#mobile-sidebar-backdrop {
    display: none;
    position: absolute;
    inset: 0;
    background: var(--modal-backdrop);
    z-index: 35;
}

/* ── Utility class ── */
.hidden {
    display: none !important;
}

/* ── Responsive ── */
@media (max-width: 768px) {
    #settings-sidebar {
        display: none;
        position: absolute;
        inset: 0;
        z-index: 40;
        width: 100%;
        max-width: 100%;
        background: var(--bg-surface);
        border-right: none;
        box-shadow: none;
    }

    #settings-sidebar.visible {
        display: flex;
    }

    #mobile-sidebar-backdrop.visible {
        display: block;
    }

    #main-content {
        padding: var(--space-3);
    }

    .preview-container {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
        gap: var(--space-3);
    }

    .modal-content {
        max-height: 98vh;
        border-radius: var(--radius-md);
    }

    .modal-header {
        padding: var(--space-2) var(--space-3);
        gap: var(--space-2);
    }

    .modal-viewport {
        padding: var(--space-3);
    }

    .md-preview-iframe.visible {
        height: 400px;
    }
}