/* Workspace Layout */
.workspace-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
    margin-bottom: 2rem;
}

#canvas-container {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 500px;
    overflow: hidden;
}

#collage-canvas {
    max-width: 100%;
    max-height: 70vh;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
}

/* Controls Panel */
#controls {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    height: fit-content;
}

.control-section {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
}

.control-section:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.control-section h3 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.control-group {
    margin-bottom: 1rem;
}

.control-group:last-child {
    margin-bottom: 0;
}

.control-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.control-group select {
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: border-color 0.2s;
}

.control-group select:hover {
    border-color: var(--primary-color);
}

.control-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.info-text {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Thumbnail Strip */
#thumbnail-strip {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 1rem;
    box-shadow: var(--shadow-md);
    display: flex;
    gap: 0.75rem;
    overflow-x: auto;
    max-width: 100%;
}

#thumbnail-strip::-webkit-scrollbar {
    height: 8px;
}

#thumbnail-strip::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

#thumbnail-strip::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 4px;
}

#thumbnail-strip::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.thumbnail {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 2px solid transparent;
}

.thumbnail:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.thumbnail.active {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Responsive Canvas Layout */
@media (max-width: 1024px) {
    .workspace-layout {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    #controls {
        order: -1;
    }

    #canvas-container {
        min-height: 400px;
    }
}

@media (max-width: 768px) {
    #canvas-container {
        padding: 1rem;
        min-height: 300px;
    }

    #collage-canvas {
        max-height: 50vh;
    }

    #controls {
        padding: 1rem;
    }

    .thumbnail {
        width: 60px;
        height: 60px;
    }

    #thumbnail-strip {
        padding: 0.75rem;
        gap: 0.5rem;
    }
}