/* style.css */
.pdf-viewer-container {
    --pdf-controls-height: 64px;
    --pdf-border-color: #e2e8f0;
    --pdf-bg-color: #ffffff;
    --pdf-controls-bg: #f8fafc;
    --pdf-btn-bg: #3b82f6;
    --pdf-btn-hover: #2563eb;
    --pdf-btn-disabled: #cbd5e1;
    
    border: 1px solid var(--pdf-border-color);
    border-radius: 0.5rem;
    margin: 1.25rem 0;
    background: var(--pdf-bg-color);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    max-width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.pdf-viewer {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
    position: relative;
}

.pdf-controls {
    height: var(--pdf-controls-height);
    padding: 0.75rem;
    background: var(--pdf-controls-bg);
    border-bottom: 1px solid var(--pdf-border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    position: sticky;
    top: 0;
    z-index: 10;
}

.pdf-controls button {
    height: 2.5rem;
    padding: 0 1rem;
    background: var(--pdf-btn-bg);
    color: white;
    border: none;
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: background-color 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 2.5rem;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.pdf-controls button:hover:not(:disabled) {
    background: var(--pdf-btn-hover);
}

.pdf-controls button:disabled {
    background: var(--pdf-btn-disabled);
    cursor: not-allowed;
    opacity: 0.75;
}

.page-info {
    font-size: 0.875rem;
    color: #475569;
    min-width: 6.25rem;
    text-align: center;
    font-weight: 500;
    user-select: none;
    white-space: nowrap;
}

.pdf-canvas-container {
    flex: 1;
    overflow: auto;
    padding: 1.25rem;
    background: var(--pdf-controls-bg);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    position: relative;
    -webkit-overflow-scrolling: touch;
}

.pdf-canvas {
    max-width: 100%;
    height: auto !important;
    background: var(--pdf-bg-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border-radius: 0.25rem;
    touch-action: pan-x pan-y pinch-zoom;
}

.zoom-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 0.75rem;
    padding-left: 0.75rem;
    border-left: 1px solid var(--pdf-border-color);
}

.error-message {
    padding: 1rem;
    color: #ef4444;
    text-align: center;
}

/* Mobile Optimizations */
@media (max-width: 640px) {
    .pdf-controls {
        height: auto;
        flex-wrap: wrap;
        gap: 0.5rem;
        padding: 0.5rem;
    }
    
    .pdf-controls button {
        height: 2.25rem;
        padding: 0 0.75rem;
        font-size: 0.813rem;
    }
    
    .page-info {
        min-width: auto;
        font-size: 0.813rem;
        order: -1;
        width: 100%;
        margin-bottom: 0.25rem;
    }
    
    .zoom-controls {
        width: 100%;
        margin: 0.25rem 0 0;
        padding: 0.5rem 0 0;
        border-left: none;
        border-top: 1px solid var(--pdf-border-color);
        justify-content: center;
    }
    
    .pdf-canvas-container {
        padding: 0.75rem;
    }
}

/* Tablet Optimizations */
@media (min-width: 641px) and (max-width: 1024px) {
    .pdf-controls {
        padding: 0.625rem;
        gap: 0.625rem;
    }
    
    .zoom-controls {
        margin-left: 0.625rem;
        padding-left: 0.625rem;
    }
}