/* Document Viewer - renders Markdown and PDF documents in center pane */

.document-viewer-wrapper {
    flex: 1;
    overflow-y: auto;
    box-sizing: border-box;
    background: var(--bg-primary);
}

.document-viewer-wrapper::-webkit-scrollbar-track {
    margin: 5px 0;
}

/* Markdown content */
.document-viewer-markdown {
    padding: 20px 32px;
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
}

.document-viewer-markdown h1 {
    font-size: 1.8em;
    font-weight: 700;
    margin: 0.6em 0 0.4em;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.3em;
}

.document-viewer-markdown h2 {
    font-size: 1.4em;
    font-weight: 600;
    margin: 0.8em 0 0.3em;
}

.document-viewer-markdown h3 {
    font-size: 1.15em;
    font-weight: 600;
    margin: 0.6em 0 0.3em;
}

.document-viewer-markdown h4,
.document-viewer-markdown h5,
.document-viewer-markdown h6 {
    font-size: 1em;
    font-weight: 600;
    margin: 0.5em 0 0.2em;
}

.document-viewer-markdown p {
    margin: 0.6em 0;
}

.document-viewer-markdown img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
}

.document-viewer-markdown a {
    color: #3272c0;
    text-decoration: none;
}

.document-viewer-markdown a:hover {
    text-decoration: underline;
}

.document-viewer-markdown pre {
    position: relative;
    background: #f6f6f6;
    color: #d4d4d4;
    padding: 0px;
    border-radius: 2px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.5;
    margin: 0.8em 0;
}

.document-viewer-markdown pre .doc-copy-btn {
    position: absolute;
    top: 6px;
    right: 6px;
    padding: 2px 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: #f6f8fa;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    line-height: 1;
}

.document-viewer-markdown pre .doc-copy-btn * {
    pointer-events: none;
}

.document-viewer-markdown pre:hover .doc-copy-btn {
    opacity: 1;
}

.document-viewer-markdown pre .doc-copy-btn:hover {
    background: #e1e4e8;
}

.document-viewer-markdown pre .doc-copy-btn.copied {
    animation: doc-copy-fade 1.5s ease-out forwards;
}

@keyframes doc-copy-fade {
    0%, 80% { opacity: 1; }
    100% { opacity: 1; }
}

.document-viewer-markdown .hljs {
    color: #24292e;
    background: #f6f6f6;
}

.document-viewer-markdown code {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

.document-viewer-markdown :not(pre) > code {
    background: rgba(0, 0, 0, 0.06);
    padding: 2px 5px;
    border-radius: 3px;
}

.document-viewer-markdown blockquote {
    border-left: 3px solid #fdcfb3;
    margin: 0.8em 0;
    padding: 0.2em 1em;
    color: #555;
    background-color: #fffbf2;
}

.document-viewer-markdown table {
    border-collapse: collapse;
    margin: 0.8em 0;
    width: 100%;
}

.document-viewer-markdown th,
.document-viewer-markdown td {
    border: 1px solid var(--border-color);
    padding: 6px 10px;
    text-align: left;
}

.document-viewer-markdown th {
    background: rgb(183 214 255 / 81%);
    font-weight: 500;
}

.document-viewer-markdown ul,
.document-viewer-markdown ol {
    margin: 0.5em 0;
    padding-left: 1.5em;
}

.document-viewer-markdown li {
    margin: 0.2em 0;
}

.document-viewer-markdown hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 1.2em 0;
}

/* PDF content */
.document-viewer-pdf {
    padding: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    background: #525659;
}

.pdf-page {
    position: relative;
    width: 100%;
    max-width: 900px;
    background: white;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
}

.pdf-page canvas {
    display: block;
    width: 100%;
    height: auto;
}

/* PDF text layer (for text selection) */
.pdf-page .textLayer {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    opacity: 0.25;
    line-height: 1;
}

.pdf-page .textLayer span {
    position: absolute;
    white-space: pre;
    color: transparent;
    pointer-events: all;
}

.pdf-page .textLayer span::selection {
    background: rgba(0, 100, 200, 0.35);
}

/* PDF annotation layer (links) */
.pdf-page .annotationLayer {
    position: absolute;
    left: 0;
    top: 0;
    transform-origin: top left;
}

.pdf-page .annotationLayer a {
    display: block;
    cursor: pointer;
}

.pdf-page .annotationLayer a:hover {
    background: rgba(255, 255, 0, 0.15);
}

/* Error state */
.document-viewer-error {
    padding: 32px;
    text-align: center;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 13px;
}

/* Explorer panel document styles */
.explorer-doc-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-top: 8px;
}

.explorer-doc-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 12px;
    color: var(--text-primary);
}

.explorer-doc-row:hover {
    background: rgba(0, 0, 0, 0.05);
}

.explorer-doc-row .explorer-doc-icon {
    width: 18px;
    height: 18px;
    object-fit: contain;
    flex-shrink: 0;
}

.explorer-doc-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* File input styling */
.explorer-file-input {
    font-family: var(--font-sans);
    font-size: 12px;
    padding: 4px 0;
}

/* Document tree node icons — SVG icons are self-colored */