/* ============================================================
   PDF TOOLS MODULE
   Module-specific styling. Uses common classes from site.css,
   components.css, and layout.css.
   ============================================================ */

/* ===== Layout shell ===== */
.pdftools-layout {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

.pdftools-content {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* ===== Compare page: 25/75 split ===== */
.pdftools-compare-page {
    display: flex;
    flex-direction: row;
    gap: var(--space-16);
    padding: var(--space-20);
    height: 100%;
    overflow: hidden;
    box-sizing: border-box;
}

.pdftools-controls {
    width: 25%;
    min-width: 220px;
    max-width: 320px;
    display: flex;
    flex-direction: column;
    gap: var(--space-12);
    overflow-y: auto;
    flex-shrink: 0;
}

.pdftools-viewer-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* ===== Split viewer ===== */
.pdftools-split {
    display: flex;
    gap: var(--space-12);
    height: 100%;
    overflow: hidden;
}

.pdftools-split--side-by-side {
    flex-direction: row;
}

.pdftools-split--over-under {
    flex-direction: column;
}

.pdftools-viewer-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
    min-width: 0;
}

.pdftools-viewer-body {
    flex: 1;
    overflow: hidden;
    position: relative;
    padding: 0;
}

.pdftools-viewer-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--color-text-muted);
    font-size: 2rem;
    gap: var(--space-8);
}

/* ===== File name display ===== */
.pdftools-file-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    margin-bottom: var(--space-8);
}

.pdftools-file-label {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 80%;
    font-size: 13px;
}

/* ===== Toggle group ===== */
.pdftools-toggle-group {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
}

.pdftools-toggle-btn {
    flex: 1;
    padding: var(--space-6) var(--space-8);
    background: var(--color-grey-200);
    border: 1px solid var(--color-border-subtle);
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
}

.pdftools-toggle-btn:hover {
    background: var(--color-grey-300);
}

.pdftools-toggle-btn.active {
    background: var(--color-brand-primary);
    border-color: var(--color-brand-primary);
    color: var(--color-white);
}

/* ===== Empty state ===== */
.pdftools-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--color-text-muted);
    gap: var(--space-16);
    text-align: center;
}

.pdftools-empty-icon {
    font-size: 4rem;
    opacity: 0.3;
}

/* ===== Compare result ===== */
.pdftools-compare-result {
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.pdftools-diff-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.pdftools-diff-body {
    position: relative;
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    overflow: auto;
    background: var(--color-grey-200);
    padding: var(--space-8);
    box-sizing: border-box;
}

/* Loading overlay — sits on top of the canvas while the diff is computing */
.pdftools-diff-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-12);
    background: rgba(255, 255, 255, 0.85);
    z-index: 10;
}

.pdftools-diff-canvas {
    /* Fit mode (no inline width/height): shrink canvas to fit the scroll area. */
    max-width: 100%;
    max-height: 100%;
    display: block;
    background: #fff;
    box-shadow: var(--shadow-md);
}

/* Zoom mode: explicit width/height is set via inline style. Remove size constraints
   so the canvas can be larger than the container (triggering scrollbars). */
.pdftools-diff-canvas--zoomed {
    max-width: none;
    max-height: none;
}

.pdftools-diff-summary {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-left: auto;
}

/* Zoom control strip in a dedicated toolbar above the diff canvas */
.pdftools-diff-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-12);
    padding: var(--space-6) var(--space-12);
    background: var(--color-grey-100);
    border-top: 1px solid var(--color-border-subtle);
    border-bottom: 1px solid var(--color-border-subtle);
    flex-shrink: 0;
}

.pdftools-diff-legend {
    display: inline-flex;
    align-items: center;
    gap: var(--space-6);
    font-size: 12px;
    color: var(--color-text-secondary);
}

.pdftools-diff-legend-swatch {
    display: inline-block;
    width: 14px;
    height: 14px;
    border-radius: 3px;
    background: rgb(220, 38, 38);
    border: 1px solid rgba(0, 0, 0, 0.15);
}

.pdftools-diff-zoom-controls {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-shrink: 0;
}

.pdftools-diff-zoom-btn {
    background: var(--color-white);
    border: 1px solid var(--color-border-subtle);
    border-radius: 4px;
    color: var(--color-text-primary);
    padding: 4px 10px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    line-height: 1.4;
    min-width: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.pdftools-diff-zoom-label {
    min-width: 56px;
    font-variant-numeric: tabular-nums;
}

.pdftools-diff-zoom-btn:hover:not(:disabled) {
    background: var(--color-grey-200);
}

.pdftools-diff-zoom-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ===== BCF Export card ===== */

.pdftools-export-card .app-card-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

/* Topic creation form */
.pdftools-topic-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.pdftools-topic-form-actions {
    display: flex;
    gap: var(--space-8);
    margin-top: var(--space-6);
}

/* Topic badge (after creation) */
.pdftools-topic-badge {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    background: var(--color-grey-100);
    border: 1px solid var(--color-border-subtle);
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 12px;
    overflow: hidden;
}

.pdftools-topic-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--color-text-primary);
    font-weight: 500;
}

.pdftools-topic-reset-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-muted);
    padding: 2px 4px;
    border-radius: 4px;
    font-size: 12px;
    flex-shrink: 0;
}

.pdftools-topic-reset-btn:hover {
    background: var(--color-grey-200);
    color: var(--color-text-primary);
}

/* Export section divider */
.pdftools-export-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    padding-top: var(--space-8);
}

/* Artifact list */
.pdftools-artifact-list {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--color-border-subtle);
    border-radius: 6px;
    overflow: hidden;
}

.pdftools-artifact-list-header {
    padding: 5px 10px;
    background: var(--color-grey-100);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-text-muted);
    border-bottom: 1px solid var(--color-border-subtle);
}

.pdftools-artifact-row {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    padding: 6px 10px;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border-subtle);
    font-size: 12px;
}

.pdftools-artifact-row:last-child {
    border-bottom: none;
}

.pdftools-artifact-row--pending {
    background: var(--color-grey-50, #fafafa);
}

.pdftools-artifact-thumbnail {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 3px;
    border: 1px solid var(--color-border-subtle);
    flex-shrink: 0;
}

.pdftools-artifact-icon {
    font-size: 20px;
    width: 40px;
    text-align: center;
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.pdftools-artifact-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.pdftools-artifact-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--color-text-primary);
    font-weight: 500;
}

.pdftools-artifact-type {
    font-size: 10px;
    color: var(--color-text-muted);
}

.pdftools-artifact-delete-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-muted);
    padding: 4px 6px;
    border-radius: 4px;
    font-size: 13px;
    flex-shrink: 0;
}

.pdftools-artifact-delete-btn:hover {
    background: var(--color-error-bg, #fef2f2);
    color: var(--color-error);
}

/* PDF status panel (inside export card) */
.pdftools-pdf-status {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.pdftools-pdf-progress {
    margin-top: 4px;
}

.pdftools-pdf-download-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
    font-size: 13px;
    font-weight: 500;
    color: var(--color-primary);
    text-decoration: none;
}

.pdftools-pdf-download-link:hover {
    text-decoration: underline;
}

.pdftools-pdf-error {
    font-size: 12px;
    color: var(--color-error);
}

.pdftools-pdf-retry-btn {
    background: none;
    border: 1px solid var(--color-border-subtle);
    border-radius: 4px;
    padding: 3px 10px;
    font-size: 12px;
    cursor: pointer;
    color: var(--color-text-secondary);
    margin-top: 2px;
}

.pdftools-pdf-retry-btn:hover {
    background: var(--color-grey-100);
}

/* Artifact management table on Settings page */
.pdftools-artifacts-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.pdftools-artifacts-table th {
    text-align: left;
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-text-muted);
    border-bottom: 2px solid var(--color-border-subtle);
    padding: 4px 8px;
}

.pdftools-artifacts-table td {
    padding: 6px 8px;
    border-bottom: 1px solid var(--color-border-subtle);
    vertical-align: middle;
}

.pdftools-artifacts-table tr:last-child td {
    border-bottom: none;
}

.pdftools-artifacts-table tr:hover td {
    background: var(--color-grey-50, #fafafa);
}

/* ===== Settings page ===== */
.pdftools-settings-page {
    padding: var(--space-24);
    max-width: 600px;
}

.pdftools-settings-header {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    margin-bottom: var(--space-16);
}

.pdftools-settings-header h4 {
    margin: 0;
    font-size: 20px;
    color: var(--color-text-primary);
}

.pdftools-slider-row {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.pdftools-slider-value {
    min-width: 40px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-primary);
}

.pdftools-settings-footer {
    display: flex;
    align-items: center;
    gap: var(--space-12);
    margin-top: var(--space-16);
}

.pdftools-save-message {
    font-size: 13px;
}

.pdftools-save-message--ok {
    color: var(--color-success, #198754);
}

.pdftools-save-message--error {
    color: var(--color-error);
}

/* ===== Shared PDF viewer component ===== */
.pdf-viewer-container {
    background: var(--color-grey-100);
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Scrollable area — grows to fill available height, scrolls when zoomed in */
.pdf-viewer-scroll-area {
    flex: 1;
    min-height: 0;
    overflow: auto;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    position: relative;
    padding: var(--space-8);
}

.pdf-viewer-canvas {
    display: block;
    box-shadow: var(--shadow-md);
    background: var(--color-white);
    /* Size is controlled entirely by JS — no CSS max-width/max-height constraints */
}

/* Toolbar sits below the scroll area as a static flex row */
.pdf-viewer-toolbar {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: var(--space-4);
    background: rgba(0,0,0,0.55);
    padding: var(--space-4) var(--space-12);
}

.pdf-viewer-toolbar-sep {
    width: 1px;
    height: 16px;
    background: rgba(255,255,255,0.3);
    margin: 0 var(--space-4);
    flex-shrink: 0;
}

.pdf-viewer-btn {
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    padding: var(--space-4) var(--space-8);
    font-size: 13px;
    border-radius: 2px;
    line-height: 1;
}

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

.pdf-viewer-btn:hover:not(:disabled) {
    background: rgba(255,255,255,0.15);
}

.pdf-viewer-page-info {
    color: #fff;
    font-size: 12px;
    min-width: 48px;
    text-align: center;
}

.pdf-viewer-zoom-info {
    color: #fff;
    font-size: 12px;
    min-width: 40px;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

.pdf-viewer-loading,
.pdf-viewer-error {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    font-size: 13px;
    color: var(--color-text-muted);
    background: var(--color-grey-100);
}

.pdf-viewer-error {
    color: var(--color-error);
}

/* ===== Markup toolbar (Compare Mode only) ===== */

.pdftools-markup-toolbar {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
    margin-top: var(--space-8);
}

.pdftools-markup-tool-row {
    display: flex;
    gap: var(--space-4);
}

.pdftools-markup-tool-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 6px 12px;
    border-radius: 6px;
    border: 1px solid var(--color-border-subtle);
    background: var(--color-grey-200);
    color: var(--color-text-secondary);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
    white-space: nowrap;
}

.pdftools-markup-tool-btn:hover {
    background: var(--color-grey-300);
}

.pdftools-markup-tool-btn--active {
    background: var(--mud-palette-primary, var(--color-brand-primary));
    border-color: var(--mud-palette-primary, var(--color-brand-primary));
    color: #ffffff;
}

.pdftools-markup-tool-btn--active:hover {
    background: var(--mud-palette-primary-darken, var(--color-brand-primary));
    border-color: var(--mud-palette-primary-darken, var(--color-brand-primary));
}

.pdftools-markup-settings {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--space-8);
    flex-wrap: wrap;
}

.pdftools-markup-color-row {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.pdftools-markup-color-swatch {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    padding: 0;
    box-sizing: border-box;
    transition: border-color 0.1s, box-shadow 0.1s;
    flex-shrink: 0;
    /* White swatch needs a visible outline so it doesn't disappear on white backgrounds */
    outline: 1px solid var(--color-border-subtle);
    outline-offset: 1px;
}

.pdftools-markup-color-swatch--active {
    border-color: var(--mud-palette-primary, var(--color-brand-primary));
    box-shadow: 0 0 0 2px var(--mud-palette-primary, var(--color-brand-primary));
}

.pdftools-markup-color-swatch:hover {
    opacity: 0.85;
}

.pdftools-markup-size-row {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-left: auto;
}

.pdftools-markup-size-btn {
    width: 28px;
    height: 28px;
    border-radius: 4px;
    border: 1px solid var(--color-border-subtle);
    background: var(--color-grey-200);
    color: var(--color-text-secondary);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, color 0.15s;
    padding: 0;
}

.pdftools-markup-size-btn:hover {
    background: var(--color-grey-300);
}

.pdftools-markup-size-btn--active {
    background: var(--mud-palette-primary, var(--color-brand-primary));
    border-color: var(--mud-palette-primary, var(--color-brand-primary));
    color: #ffffff;
}

/* ===== Markup overlay (sits on top of diff canvas) ===== */

.pdftools-diff-canvas-wrapper {
    position: relative;
    display: inline-block; /* shrinks to canvas size */
    line-height: 0;        /* eliminate inline baseline gap */
}

.pdftools-markup-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

/* SVG layer — fills overlay, individual delete buttons opt in to pointer-events */
.pdftools-markup-svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: visible;
}

/* Floating text input for click-to-place Text tool */
.pdftools-markup-text-input {
    position: absolute;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.92);
    border: 1.5px solid var(--mud-palette-primary, var(--color-brand-primary));
    border-radius: 3px;
    padding: 2px 6px;
    font-size: 14px;
    font-family: Inter, sans-serif;
    outline: none;
    z-index: 20;
    min-width: 80px;
    max-width: 260px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.12);
}

/* Applied via class when a tool is active (pointer-events toggled inline via style, but class is available for theming) */
.pdftools-markup-overlay--active {
    pointer-events: all;
}

/* Legacy alias — floating text-entry input (same as pdftools-markup-text-input) */
.pdftools-text-input-overlay {
    position: absolute;
    background: white;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 2px 6px;
    font-family: Inter, sans-serif;
    z-index: 10;
    min-width: 120px;
}