/* Scoped Styles - All prefixed with 'gpme-' to avoid conflicts */
:root {
    --gpme-primary: #3b82f6;
    --gpme-primary-hover: #2563eb;
    --gpme-bg: #f3f4f6;
    --gpme-panel-bg: #ffffff;
    --gpme-text: #1f2937;
    --gpme-border: #e5e7eb;
    --gpme-danger: #ef4444;
    --gpme-radius: 8px;
    --gpme-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
        0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.gpme-container {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: var(--gpme-bg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        Helvetica, Arial, sans-serif;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
}

/* Toolbar */
.gpme-toolbar {
    background-color: var(--gpme-panel-bg);
    border-bottom: 1px solid var(--gpme-border);
    padding: 0.75rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
    justify-content: space-between;
    z-index: 10;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.gpme-tool-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.gpme-divider {
    width: 1px;
    height: 24px;
    background-color: var(--gpme-border);
    margin: 0 0.25rem;
}

.gpme-label {
    font-size: 0.85rem;
    color: #6b7280;
    margin-right: 0.25rem;
    display: none; /* Hidden on small screens */
}

/* Inputs & Buttons */
.gpme-btn {
    background: var(--gpme-panel-bg);
    border: 1px solid var(--gpme-border);
    color: var(--gpme-text);
    padding: 0.4rem 0.6rem;
    border-radius: var(--gpme-radius);
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    min-width: 36px;
}

.gpme-btn:hover {
    background-color: #f9fafb;
    border-color: #d1d5db;
}

.gpme-btn.active {
    background-color: var(--gpme-primary);
    color: white;
    border-color: var(--gpme-primary);
}

.gpme-btn.danger {
    color: var(--gpme-danger);
    border-color: #fca5a5;
}
.gpme-btn.danger:hover {
    background-color: #fef2f2;
}

.gpme-input-color {
    width: 36px;
    height: 36px;
    padding: 0;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    overflow: hidden;
    background: none;
}

.gpme-input-color::-webkit-color-swatch-wrapper {
    padding: 0;
}
.gpme-input-color::-webkit-color-swatch {
    border: none;
    border-radius: 50%;
    border: 1px solid var(--gpme-border);
}

.gpme-input-range {
    width: 80px;
}

.gpme-file-input {
    display: none;
}

/* Workspace */
.gpme-viewport {
    flex: 1;
    position: relative;
    overflow: hidden;
    cursor: crosshair;
    background-image: radial-gradient(#d1d5db 1px, transparent 1px);
    background-size: 20px 20px;
    touch-action: none; /* Critical for touch drawing */
}

.gpme-viewport.panning {
    cursor: grab;
}
.gpme-viewport.panning:active {
    cursor: grabbing;
}

/* Transform Layer (Container for Image + Canvas) */
.gpme-layer {
    position: absolute;
    left: 0;
    top: 0;
    transform-origin: 0 0;
    /* Will be manipulated via JS transform */
    box-shadow: var(--gpme-shadow);
    line-height: 0; /* Fix image bottom gap */
}

.gpme-base-image {
    max-width: none;
    display: block;
    pointer-events: none; /* Let events pass to container */
}

.gpme-drawing-canvas {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none; /* Let JS handle drawing logic via container */
}

/* Modals */
.gpme-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.gpme-modal-overlay.visible {
    opacity: 1;
    pointer-events: auto;
}

.gpme-modal {
    background: white;
    padding: 1.5rem;
    border-radius: var(--gpme-radius);
    width: 90%;
    max-width: 400px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.gpme-modal h3 {
    margin-top: 0;
    color: var(--gpme-text);
}
.gpme-modal p {
    color: #4b5563;
    font-size: 0.95rem;
}

.gpme-modal textarea {
    width: 100%;
    height: 150px;
    margin: 10px 0;
    padding: 8px;
    border: 1px solid var(--gpme-border);
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.8rem;
    resize: vertical;
}

.gpme-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    margin-top: 1rem;
}

@media (max-width: 425px) {
    .gpme-divider {
        display: none;
    }
    .gpme-tool-group {
        justify-content: start;
        overflow-x: auto;
        padding-bottom: 2px;
    }
    .gpme-input-range {
        flex: 1;
    }
}

/* Responsive Styles */
@media (max-width: 768px) {
    .gpme-divider {
        display: none;
    }
    .gpme-toolbar {
        flex-direction: column;
        align-items: stretch;
        padding: 0.5rem;
        order: 2; /* Move to bottom on mobile */
        border-bottom: none;
        border-top: 1px solid var(--gpme-border);
    }
    .gpme-tool-group {
        justify-content: space-between;
        overflow-x: auto;
        padding-bottom: 2px;
    }
    .gpme-label {
        display: none;
    }
    .gpme-input-range {
        flex: 1;
    }
    .gpme-container {
        flex-direction: column;
    }
    .gpme-viewport {
        order: 1;
    }
}