.pdf-viewer-component {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
    overflow: hidden;
    --pdf-bg-primary: #1a1a2e;
    --pdf-bg-secondary: #2a2a3e;
    --pdf-bg-toolbar: linear-gradient(135deg, rgba(49, 46, 129, 0.3) 0%, rgba(30, 30, 45, 0.6) 100%);
    --pdf-accent: #8b5cf6;
    --pdf-accent-hover: #a78bfa;
    --pdf-text-primary: #f8fafc;
    --pdf-text-muted: #94a3b8;
    --pdf-border: rgba(139, 92, 246, 0.2);
    --pdf-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
}

.pdf-viewer-theme-light {
    --pdf-bg-primary: #f8fafc;
    --pdf-bg-secondary: #ffffff;
    --pdf-bg-toolbar: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(248, 250, 252, 0.95) 100%);
    --pdf-text-primary: #1e293b;
    --pdf-text-muted: #64748b;
    --pdf-border: rgba(139, 92, 246, 0.15);
    --pdf-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.pdf-toolbar {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 12px;
    padding: 10px 16px;
    background: var(--pdf-bg-toolbar);
    border-bottom: 1px solid var(--pdf-border);
    flex-shrink: 0;
}

.pdf-toolbar-group {
    display: flex;
    align-items: center;
    gap: 6px;
}

.pdf-toolbar-group:not(:first-child):not(.pdf-highlight-nav-group) {
    padding-left: 12px;
    margin-left: 4px;
    border-left: 1px solid var(--pdf-border);
}

.pdf-toolbar-separator {
    width: 1px;
    height: 24px;
    background: var(--pdf-border);
    margin: 0 8px;
}

.pdf-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 10px;
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 6px;
    color: var(--pdf-text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 14px;
    text-decoration: none;
    min-width: 32px;
}

.pdf-btn:hover {
    background: rgba(139, 92, 246, 0.25);
    border-color: var(--pdf-accent);
}

.pdf-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pdf-page-info {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--pdf-text-muted);
    font-size: 13px;
}

.pdf-page-input {
    width: 45px;
    text-align: center;
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 4px;
    color: var(--pdf-text-primary);
    padding: 4px;
    font-size: 13px;
}

.pdf-page-input:focus {
    outline: none;
    border-color: var(--pdf-accent);
}

.pdf-page-divider {
    color: var(--pdf-text-muted);
}

.pdf-page-count {
    color: var(--pdf-text-muted);
}

.pdf-zoom-display {
    color: var(--pdf-text-primary);
    font-size: 13px;
    min-width: 50px;
    text-align: center;
}

.pdf-search-input {
    width: 120px;
    padding: 6px 10px;
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 6px;
    color: var(--pdf-text-primary);
    font-size: 13px;
}

.pdf-search-input:focus {
    outline: none;
    border-color: var(--pdf-accent);
}

.pdf-search-input::placeholder {
    color: var(--pdf-text-muted);
}

.pdf-search-results {
    color: var(--pdf-text-muted);
    font-size: 12px;
    min-width: 60px;
}

.pdf-search-counter {
    color: var(--pdf-text-primary);
    font-size: 12px;
    font-weight: 500;
    padding: 2px 8px;
    background: rgba(139, 92, 246, 0.2);
    border-radius: 10px;
    min-width: 45px;
    text-align: center;
}

.pdf-search-highlight {
    position: absolute;
    background: rgba(255, 255, 0, 0.4);
    pointer-events: none;
    z-index: 10;
    border-radius: 2px;
    transition: background 0.2s ease;
}

.pdf-search-highlight-current {
    background: rgba(255, 165, 0, 0.6) !important;
    box-shadow: 0 0 4px 2px rgba(255, 165, 0, 0.4);
}

.pdf-highlight-nav-group {
    border-left: 1px solid var(--pdf-border);
    padding-left: 12px;
    margin-left: 4px;
}

.pdf-highlight-label {
    color: var(--pdf-text-muted);
    font-size: 12px;
    margin-right: 4px;
}

.pdf-highlight-counter {
    color: var(--pdf-text-primary);
    font-size: 12px;
    font-weight: 500;
    padding: 2px 8px;
    background: rgba(34, 197, 94, 0.2);
    border-radius: 10px;
    min-width: 45px;
    text-align: center;
}

.pdf-content-wrapper {
    flex: 1;
    display: flex;
    position: relative;
    overflow: hidden;
    min-height: 0;
    height: 100%;
}

.pdf-canvas-container {
    flex: 1;
    overflow: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px;
    background: linear-gradient(180deg, var(--pdf-bg-primary) 0%, #0f0f1a 100%);
    min-height: 0;
    height: 100%;
}

.pdf-search-marker-rail {
    position: absolute;
    right: 4px;
    top: 0;
    bottom: 0;
    width: 12px;
    background: transparent;
    pointer-events: none;
    z-index: 100;
}

.pdf-search-marker {
    position: absolute;
    left: 2px;
    right: 2px;
    height: 3px;
    background: rgba(255, 220, 0, 0.85);
    border-radius: 1px;
    pointer-events: auto;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.15s ease;
}

.pdf-search-marker:hover {
    background: rgba(255, 165, 0, 1);
    transform: scaleX(1.3);
}

.pdf-search-marker.current {
    background: rgba(255, 100, 0, 1);
    height: 4px;
    box-shadow: 0 0 4px rgba(255, 100, 0, 0.6);
}

.pdf-page-wrapper {
    position: relative;
    margin: 0 auto 16px auto;
    background: var(--pdf-bg-secondary);
    box-shadow: var(--pdf-shadow);
    border-radius: 4px;
    transition: box-shadow 0.3s ease;
}

.pdf-page-wrapper.pdf-page-highlight {
    box-shadow: 0 0 0 4px var(--pdf-accent), var(--pdf-shadow);
}

.pdf-page-placeholder {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--pdf-text-muted);
    font-size: 14px;
}

.pdf-page-canvas {
    display: block;
    border-radius: 4px;
}

.pdf-text-layer {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    opacity: 0.2;
    line-height: 1.0;
    pointer-events: all;
    user-select: text;
    -webkit-user-select: text;
}

.pdf-text-layer > span {
    position: absolute;
    white-space: pre;
    color: transparent;
    pointer-events: all;
}

.pdf-text-layer ::selection {
    background: rgba(139, 92, 246, 0.4);
}

.pdf-citation-highlight {
    position: absolute;
    background: rgba(139, 92, 246, 0.3);
    border: 2px solid var(--pdf-accent);
    border-radius: 4px;
    pointer-events: none;
    animation: pdf-citation-pulse 1s ease-out 3;
}

@keyframes pdf-citation-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.pdf-citation-highlight-precise {
    position: absolute;
    background: rgba(139, 92, 246, 0.35);
    border: 2px solid rgba(139, 92, 246, 0.8);
    border-radius: 3px;
    pointer-events: none;
    z-index: 10;
    animation: citationPulse 2s ease-out;
}

@keyframes citationPulse {
    0% { 
        opacity: 0;
        transform: scale(0.95);
    }
    20% {
        opacity: 1;
        transform: scale(1);
    }
    60% {
        opacity: 1;
    }
    100% { 
        opacity: 0.6;
    }
}

.pdf-metadata-strip {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 8px 16px;
    background: var(--pdf-bg-secondary);
    border-bottom: 1px solid var(--pdf-border);
    font-size: 12px;
    color: var(--pdf-text-muted);
    flex-shrink: 0;
}

.pdf-metadata-strip .pdf-filename {
    font-weight: 600;
    color: var(--pdf-text-primary);
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.pdf-metadata-strip .pdf-meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.pdf-metadata-strip .pdf-meta-icon {
    opacity: 0.7;
}

.pdf-metadata-strip .pdf-meta-label {
    color: var(--pdf-text-muted);
}

.pdf-metadata-strip .pdf-meta-value {
    color: var(--pdf-text-primary);
}

.pdf-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--pdf-text-muted);
    gap: 16px;
}

.pdf-loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(139, 92, 246, 0.2);
    border-top-color: var(--pdf-accent);
    border-radius: 50%;
    animation: pdf-spin 1s linear infinite;
}

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

.pdf-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: #ef4444;
    gap: 12px;
    text-align: center;
    padding: 24px;
}

.pdf-error-icon {
    font-size: 48px;
}

.pdf-error-detail {
    font-size: 0.85em;
    color: var(--pdf-text-muted);
}

.pdf-error-download {
    margin-top: 16px;
    padding: 10px 20px;
    background: var(--pdf-accent);
    color: white;
    border-radius: 6px;
    text-decoration: none;
    transition: background 0.2s ease;
}

.pdf-error-download:hover {
    background: var(--pdf-accent-hover);
}

.pdf-viewer-fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    background: var(--pdf-bg-primary);
}

.pdf-viewer-fullscreen .pdf-canvas-container {
    height: calc(100vh - 60px);
}

.pdf-toolbar-actions {
    border-left: none !important;
    padding-left: 0 !important;
}

@media (max-width: 768px) {
    .pdf-toolbar {
        padding: 8px 12px;
        gap: 8px;
    }
    
    .pdf-toolbar-group {
        gap: 4px;
    }
    
    .pdf-btn {
        padding: 6px 8px;
        font-size: 13px;
        min-width: 28px;
    }
    
    .pdf-search-input {
        width: 80px;
    }
    
    .pdf-canvas-container {
        padding: 12px;
    }
}