potato/static/image-annotation.css

/**
 * Image Annotation Styles
 *
 * Styling for the canvas-based image annotation interface.
 */

/* Container */
.image-annotation-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Toolbar */
.image-annotation-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 15px;
    padding: 10px 15px;
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 6px;
}

.tool-group,
.label-group,
.zoom-group,
.edit-group,
.count-group {
    display: flex;
    align-items: center;
    gap: 5px;
}

.tool-group-label {
    font-size: 12px;
    font-weight: 600;
    color: #495057;
    margin-right: 5px;
}

/* Tool buttons */
.tool-btn,
.label-btn,
.zoom-btn,
.edit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 6px 12px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    background: #fff;
    color: #495057;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.tool-btn:hover,
.label-btn:hover,
.zoom-btn:hover,
.edit-btn:hover {
    background: #e9ecef;
    border-color: #adb5bd;
}

.tool-btn.active,
.label-btn.active {
    background: #0d6efd;
    border-color: #0d6efd;
    color: #fff;
}

.tool-btn:focus,
.label-btn:focus,
.zoom-btn:focus,
.edit-btn:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(13, 110, 253, 0.25);
}

/* Label buttons with color indicator */
.label-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
}

.label-color-dot {
    display: inline-block;
    width: 12px;
    height: 12px;
    min-width: 12px;
    border-radius: 50%;
    border: 2px solid rgba(0, 0, 0, 0.1);
    flex-shrink: 0;
}

.label-btn.active .label-color-dot {
    border-color: rgba(255, 255, 255, 0.5);
}

/* Zoom buttons */
.zoom-btn {
    min-width: 40px;
    padding: 6px 10px;
}

/* Edit buttons */
.edit-btn {
    padding: 6px 10px;
}

.edit-btn.delete-btn {
    color: #dc3545;
    border-color: #dc3545;
}

.edit-btn.delete-btn:hover {
    background: #dc3545;
    color: #fff;
}

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

/* Annotation count */
.annotation-count {
    font-size: 13px;
    color: #6c757d;
    padding: 6px 12px;
    background: #e9ecef;
    border-radius: 4px;
}

.count-value {
    font-weight: 600;
    color: #495057;
}

/* Canvas wrapper */
.canvas-wrapper {
    position: relative;
    width: 100%;
    min-height: 400px;
    height: 500px;  /* Explicit height for Fabric.js canvas rendering */
    max-height: calc(100vh - 200px);
    background: #f8f9fa !important;  /* Force light background */
    border: 2px solid #dee2e6;
    border-radius: 6px;
    overflow: hidden;
}

/* Ensure Fabric.js canvas container has light background */
.canvas-wrapper .canvas-container {
    background: #f8f9fa !important;
}

.annotation-canvas {
    display: block;
    width: 100%;
    cursor: crosshair;
}

/* Canvas checkered background for transparency */
.canvas-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(45deg, #e0e0e0 25%, transparent 25%),
        linear-gradient(-45deg, #e0e0e0 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #e0e0e0 75%),
        linear-gradient(-45deg, transparent 75%, #e0e0e0 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    pointer-events: none;
    z-index: -1;
}

/* Hidden data input */
.annotation-data-input {
    display: none;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .image-annotation-toolbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .tool-group,
    .label-group,
    .zoom-group,
    .edit-group {
        flex-wrap: wrap;
    }

    .tool-btn,
    .label-btn,
    .zoom-btn,
    .edit-btn {
        font-size: 12px;
        padding: 5px 10px;
    }
}

/* Dark mode support - only apply when explicitly enabled via class */
/* To enable dark mode, add class="dark-mode" to the container */
.image-annotation-container.dark-mode .image-annotation-toolbar {
    background: #2d3748;
    border-color: #4a5568;
}

.image-annotation-container.dark-mode .tool-group-label {
    color: #a0aec0;
}

.image-annotation-container.dark-mode .tool-btn,
.image-annotation-container.dark-mode .label-btn,
.image-annotation-container.dark-mode .zoom-btn,
.image-annotation-container.dark-mode .edit-btn {
    background: #4a5568;
    border-color: #718096;
    color: #e2e8f0;
}

.image-annotation-container.dark-mode .tool-btn:hover,
.image-annotation-container.dark-mode .label-btn:hover,
.image-annotation-container.dark-mode .zoom-btn:hover,
.image-annotation-container.dark-mode .edit-btn:hover {
    background: #718096;
    border-color: #a0aec0;
}

.image-annotation-container.dark-mode .canvas-wrapper {
    background: #1a202c;
    border-color: #4a5568;
}

.image-annotation-container.dark-mode .canvas-wrapper::before {
    background-image:
        linear-gradient(45deg, #2d3748 25%, transparent 25%),
        linear-gradient(-45deg, #2d3748 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #2d3748 75%),
        linear-gradient(-45deg, transparent 75%, #2d3748 75%);
}

.image-annotation-container.dark-mode .annotation-count {
    background: #4a5568;
    color: #a0aec0;
}

.image-annotation-container.dark-mode .count-value {
    color: #e2e8f0;
}

/* Form styling within image annotation */
.annotation-form.image-annotation fieldset {
    border: none;
    padding: 0;
    margin: 0;
}

.annotation-form.image-annotation legend {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #dee2e6;
    width: 100%;
}

/* Loading state */
.image-annotation-container.loading .canvas-wrapper::after {
    content: 'Loading image...';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 14px;
    color: #6c757d;
}

/* Error state */
.image-annotation-container.error .canvas-wrapper::after {
    content: 'Failed to load image';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 14px;
    color: #dc3545;
}

/* Annotation highlight on hover */
.canvas-container canvas {
    outline: none;
}

/* Custom scrollbar for toolbar overflow */
.image-annotation-toolbar::-webkit-scrollbar {
    height: 6px;
}

.image-annotation-toolbar::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

.image-annotation-toolbar::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

.image-annotation-toolbar::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}