Add in-app pixel editor for sprites in admin UI
Build a dependency-free Canvas2D pixel editor integrated into the admin
Sprites tab. Each sprite card gains an EDIT button that opens a full-screen
editor for the sprite at its native 500x333 resolution.
Tools: pencil (1-8px brush, Bresenham interpolation), eraser, color picker
(palette + native input + pick-from-canvas), fill bucket (flood fill), pan.
Features: cursor-centered zoom, space-drag pan, undo/redo (snapshot per
stroke), pixel grid overlay, transparency checkerboard, load existing sprite,
and keyboard shortcuts (B/E/I/F, Space, +/-/0, Ctrl+Z/Y, G, Esc).
Export reuses the existing POST /api/admin/sprites/{type} upload endpoint via
srcCanvas.toBlob, so no server changes are required.
Closes #5
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
root
+238
@@ -592,6 +592,244 @@ textarea {
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font-size: 11px;
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}
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/* ===================================================================
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Pixel Editor
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=================================================================== */
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.pe-overlay {
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position: fixed;
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inset: 0;
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background: rgba(0, 0, 0, 0.85);
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z-index: 2000;
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display: flex;
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align-items: center;
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justify-content: center;
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padding: 20px;
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}
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body.pe-open { overflow: hidden; }
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.pe-modal {
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background: linear-gradient(180deg, #2c3e50 0%, #1a252f 100%);
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border: 3px solid #fcd444;
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border-radius: 12px;
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width: 100%;
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max-width: 1100px;
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height: 100%;
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max-height: 760px;
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display: flex;
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flex-direction: column;
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box-shadow: 0 8px 40px rgba(0, 0, 0, 0.6);
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overflow: hidden;
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}
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.pe-header {
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display: flex;
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align-items: center;
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justify-content: space-between;
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padding: 12px 16px;
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background: rgba(0, 0, 0, 0.3);
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border-bottom: 2px solid #5c94fc;
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flex-wrap: wrap;
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gap: 8px;
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}
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.pe-header .retro-title {
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font-size: 13px;
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margin: 0;
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}
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.pe-header-actions {
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display: flex;
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gap: 6px;
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flex-wrap: wrap;
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}
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.pe-body {
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flex: 1;
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display: grid;
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grid-template-columns: auto 1fr auto;
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grid-template-rows: 1fr;
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min-height: 0;
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}
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/* Toolbar (left column) */
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.pe-toolbar {
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display: flex;
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flex-direction: column;
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gap: 14px;
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padding: 14px 10px;
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background: rgba(0, 0, 0, 0.25);
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border-right: 2px solid #5c94fc;
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overflow-y: auto;
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}
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.pe-tool-group {
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display: flex;
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flex-direction: column;
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gap: 6px;
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padding-bottom: 12px;
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border-bottom: 1px solid rgba(92, 148, 252, 0.25);
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}
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.pe-tool-group:last-child { border-bottom: none; padding-bottom: 0; }
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.pe-tool, .pe-icon-btn {
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width: 44px;
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height: 44px;
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font-size: 20px;
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line-height: 1;
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border: 2px solid #5c94fc;
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border-radius: 6px;
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background: rgba(92, 148, 252, 0.15);
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color: #fcfcfc;
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cursor: pointer;
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transition: all 0.12s;
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display: flex;
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align-items: center;
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justify-content: center;
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}
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.pe-tool:hover, .pe-icon-btn:hover:not(:disabled) {
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background: rgba(92, 148, 252, 0.4);
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}
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.pe-tool.active {
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background: rgba(252, 212, 68, 0.3);
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border-color: #fcd444;
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color: #fcd444;
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}
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.pe-icon-btn:disabled {
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opacity: 0.35;
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cursor: not-allowed;
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}
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.pe-tool-label {
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font-family: 'Press Start 2P', monospace;
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font-size: 8px;
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color: #b4d4ec;
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text-align: center;
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}
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.pe-check {
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display: flex;
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align-items: center;
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gap: 6px;
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font-family: 'Press Start 2P', monospace;
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font-size: 8px;
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color: #b4d4ec;
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cursor: pointer;
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}
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.pe-check input { width: 16px; height: 16px; accent-color: #fcd444; cursor: pointer; }
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.pe-brush-group { align-items: center; }
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.pe-brush-group input[type="range"] { width: 44px; accent-color: #fcd444; }
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/* Canvas area (center column) */
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.pe-canvas-wrap {
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position: relative;
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min-width: 0;
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background: #14202b;
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overflow: hidden;
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}
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#pe-view {
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display: block;
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width: 100%;
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height: 100%;
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touch-action: none;
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}
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/* Sidebar (right column) */
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.pe-sidebar {
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width: 150px;
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padding: 14px 12px;
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background: rgba(0, 0, 0, 0.25);
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border-left: 2px solid #5c94fc;
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display: flex;
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flex-direction: column;
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gap: 14px;
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overflow-y: auto;
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}
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.pe-color-current {
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display: flex;
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flex-direction: column;
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gap: 8px;
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align-items: center;
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}
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.pe-swatch-large {
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width: 100%;
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height: 48px;
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border: 2px solid #fcfcfc;
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border-radius: 6px;
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background: #5c94fc;
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}
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#pe-color-input {
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width: 100%;
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height: 32px;
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padding: 2px;
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border: 2px solid #5c94fc;
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border-radius: 6px;
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background: rgba(0, 0, 0, 0.5);
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cursor: pointer;
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}
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.pe-palette {
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display: grid;
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grid-template-columns: repeat(4, 1fr);
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gap: 4px;
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}
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.pe-swatch {
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aspect-ratio: 1;
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border: 1px solid rgba(255, 255, 255, 0.3);
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border-radius: 3px;
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cursor: pointer;
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padding: 0;
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transition: transform 0.1s;
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}
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.pe-swatch:hover {
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transform: scale(1.12);
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border-color: #fcd444;
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}
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.pe-readout {
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margin-top: auto;
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font-family: 'Press Start 2P', monospace;
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font-size: 8px;
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color: #b4d4ec;
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line-height: 2.2;
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}
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.pe-readout span { color: #54fc54; }
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/* Sprite card EDIT button uses primary accent */
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.sprite-edit-btn { border-color: #fcd444; color: #fcd444; }
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.sprite-edit-btn:hover { background: rgba(252, 212, 68, 0.3); }
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@media (max-width: 768px) {
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.pe-modal { max-height: none; border-radius: 0; }
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.pe-body { grid-template-columns: auto 1fr; }
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.pe-sidebar {
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grid-column: 1 / -1;
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grid-row: 2;
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width: auto;
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flex-direction: row;
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flex-wrap: wrap;
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align-items: center;
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border-left: none;
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border-top: 2px solid #5c94fc;
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}
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.pe-body { grid-template-rows: 1fr auto; }
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.pe-palette { flex: 1; }
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.pe-readout { margin-top: 0; }
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}
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/* Mobile */
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@media (max-width: 768px) {
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.admin-header {
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