/* ============================================
   Document Viewer Styles
   ============================================ */

.doc-viewer {
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 400px;
    background: var(--surface-alt, #f8fafc);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border, #e2e8f0);
}

/* Toolbar */
.doc-viewer-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.5rem 1rem;
    background: var(--surface, #ffffff);
    border-bottom: 1px solid var(--border, #e2e8f0);
    flex-shrink: 0;
    flex-wrap: wrap;
}

.doc-viewer-title {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text, #1e293b);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
}

.doc-viewer-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.doc-viewer-zoom {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-muted, #64748b);
    min-width: 3rem;
    text-align: center;
}

.doc-viewer-page-indicator {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-muted, #64748b);
    white-space: nowrap;
    flex-shrink: 0;
}

.doc-viewer-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--border, #e2e8f0);
    border-radius: 6px;
    background: var(--surface, #ffffff);
    color: var(--text, #1e293b);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: inherit;
}

.doc-viewer-btn:hover {
    background: var(--surface-alt, #f8fafc);
    border-color: var(--accent, #f97316);
}

/* Pages container */
.doc-viewer-pages {
    flex: 1;
    overflow-y: auto;
    overflow-x: auto;
    padding: 1rem;
    scroll-behavior: smooth;
    cursor: grab;
}

.doc-viewer-pages.dragging {
    cursor: grabbing;
    user-select: none;
}

.doc-viewer-pages.dragging .doc-viewer-page-img {
    pointer-events: none;
}

.doc-viewer-pages-wrapper {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
}

/* Page slot */
.doc-viewer-page-slot {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    position: relative;
}

[data-theme="dark"] .doc-viewer-page-slot {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.doc-viewer-page-img {
    width: 100%;
    height: auto;
    display: block;
    user-select: none;
    -webkit-user-select: none;
    -webkit-user-drag: none;
    pointer-events: auto;
}

/* Shimmer loading animation */
.doc-viewer-shimmer {
    width: 100%;
    position: relative;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: doc-shimmer 1.5s infinite;
}

[data-theme="dark"] .doc-viewer-shimmer {
    background: linear-gradient(90deg, #1e293b 25%, #334155 50%, #1e293b 75%);
    background-size: 200% 100%;
}

@keyframes doc-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Page error state */
.doc-viewer-page-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
    color: var(--text-muted, #64748b);
    gap: 1rem;
}

/* Document-level error state */
.doc-viewer-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    gap: 1rem;
    color: var(--text-muted, #64748b);
}

/* Mobile adjustments */
@media (max-width: 640px) {
    .doc-viewer-toolbar {
        padding: 0.5rem 0.75rem;
        gap: 0.5rem;
    }

    .doc-viewer-title {
        font-size: 0.8rem;
        flex-basis: 100%;
        order: -1;
    }

    .doc-viewer-pages {
        padding: 0.5rem;
    }

    .doc-viewer-page-slot {
        border-radius: 2px;
    }
}