*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--color-bg: #1a1a1e;--color-surface: #26262c;--color-surface-alt: #2e2e36;--color-border: #3a3a44;--color-text: #e8e8ec;--color-text-muted: #8888a0;--color-accent: #5b8af7;--color-accent-hover: #7aa3ff;--color-danger: #e05555;--color-siding: #5b8af7;--color-shutters: #e0a83a;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--shadow-panel: 0 2px 8px rgba(0,0,0,.4);font-family:Inter,system-ui,Helvetica,Arial,sans-serif;font-size:14px;line-height:1.5;color:var(--color-text);background-color:var(--color-bg)}body{min-height:100vh;display:flex;flex-direction:column}.app-header{padding:16px 24px;border-bottom:1px solid var(--color-border);background:var(--color-surface)}.app-header h1{font-size:20px;font-weight:700;letter-spacing:-.3px}.app-subtitle{color:var(--color-text-muted);font-size:13px;margin-top:2px}.app-layout{display:grid;grid-template-columns:240px 1fr 280px;grid-template-rows:1fr;flex:1;min-height:0;overflow:hidden}.panel{overflow-y:auto;padding:16px}.panel-left,.panel-right{background:var(--color-surface);border-right:1px solid var(--color-border);display:flex;flex-direction:column;gap:20px}.panel-right{border-right:none;border-left:1px solid var(--color-border)}.panel-center{background:var(--color-bg);display:flex;align-items:center;justify-content:center;padding:24px}.panel-heading{font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--color-text-muted);margin-bottom:10px}.control-group{display:flex;flex-direction:column;gap:8px}.control-label{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--color-text)}.control-value{font-variant-numeric:tabular-nums;color:var(--color-accent);font-size:12px}.hint{font-size:11px;color:var(--color-text-muted);line-height:1.4}.btn{display:inline-flex;align-items:center;justify-content:center;padding:8px 14px;border-radius:var(--radius-md);border:none;font-size:13px;font-weight:500;cursor:pointer;transition:background .15s,opacity .15s;width:100%}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-primary{background:var(--color-accent);color:#fff}.btn-primary:not(:disabled):hover{background:var(--color-accent-hover)}.btn-secondary{background:var(--color-surface-alt);color:var(--color-text);border:1px solid var(--color-border)}.btn-secondary:not(:disabled):hover{background:var(--color-border)}.btn-ghost{background:transparent;color:var(--color-text-muted);border:1px solid var(--color-border)}.btn-ghost:not(:disabled):hover{color:var(--color-text);border-color:var(--color-text-muted)}.upload-label{cursor:pointer;-webkit-user-select:none;user-select:none}.mode-toggle{display:flex;border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--color-border)}.mode-btn{flex:1;padding:7px 10px;background:var(--color-surface-alt);border:none;color:var(--color-text-muted);font-size:13px;font-weight:500;cursor:pointer;transition:background .15s,color .15s}.mode-btn:first-child{border-right:1px solid var(--color-border)}.mode-btn.active[data-mode=siding]{background:var(--color-siding);color:#fff}.mode-btn.active[data-mode=shutters]{background:var(--color-shutters);color:#fff}.mode-btn:not(.active):hover{background:var(--color-border);color:var(--color-text)}.slider{-webkit-appearance:none;width:100%;height:4px;border-radius:2px;background:var(--color-border);outline:none;cursor:pointer}.slider::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;border-radius:50%;background:var(--color-accent);cursor:pointer;transition:background .15s}.slider::-webkit-slider-thumb:hover{background:var(--color-accent-hover)}.canvas-wrapper{position:relative;width:100%;height:100%;display:flex;align-items:center;justify-content:center}#main-canvas{display:none;max-width:100%;max-height:100%;border-radius:var(--radius-lg);box-shadow:var(--shadow-panel);cursor:crosshair}#main-canvas.visible{display:block}.canvas-placeholder{display:flex;align-items:center;justify-content:center;width:100%;height:100%;min-height:400px;border:2px dashed var(--color-border);border-radius:var(--radius-lg);color:var(--color-text-muted)}.canvas-placeholder.hidden{display:none}.placeholder-inner{display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center}.placeholder-inner p{font-size:14px}.selection-preview{display:flex;flex-direction:column;gap:8px}.preview-swatch-row{display:flex;align-items:center;gap:10px}.preview-label{font-size:12px;color:var(--color-text-muted);width:52px;flex-shrink:0}.preview-swatch{width:32px;height:32px;border-radius:var(--radius-sm);border:2px solid var(--color-border);background:var(--color-surface-alt);flex-shrink:0}.preview-name{font-size:12px;color:var(--color-text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.palette-section{flex:1;min-height:0}.palette-filter{display:flex;gap:4px;margin-bottom:4px}.filter-btn{padding:4px 10px;border-radius:var(--radius-sm);border:1px solid var(--color-border);background:var(--color-surface-alt);color:var(--color-text-muted);font-size:11px;font-weight:500;cursor:pointer;transition:background .15s,color .15s}.filter-btn.active{background:var(--color-accent);border-color:var(--color-accent);color:#fff}.filter-btn:not(.active):hover{background:var(--color-border);color:var(--color-text)}.palette-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;overflow-y:auto;max-height:320px;padding-right:2px}.palette-category-heading{grid-column:1 / -1;font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--color-text-muted);padding:6px 0 2px;border-bottom:1px solid var(--color-border)}.palette-category-heading:first-child{padding-top:0}.swatch-item{display:flex;flex-direction:column;align-items:center;gap:4px;cursor:pointer;border-radius:var(--radius-md);padding:4px;transition:background .15s;position:relative;border:2px solid transparent}.swatch-item:hover{background:var(--color-surface-alt)}.swatch-item.selected-siding{border-color:var(--color-siding)}.swatch-item.selected-shutters{border-color:var(--color-shutters)}.swatch-img{width:100%;aspect-ratio:1;border-radius:var(--radius-sm);object-fit:cover;display:block}.swatch-label{font-size:10px;color:var(--color-text-muted);text-align:center;line-height:1.2;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.swatch-type-toggle{position:absolute;top:5px;right:5px;background:#0000008c;border:none;border-radius:var(--radius-sm);color:#fff;font-size:10px;padding:1px 4px;cursor:pointer;line-height:1.6;opacity:0;transition:opacity .15s}.swatch-item:hover .swatch-type-toggle{opacity:1}.format-toggle{display:flex;border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--color-border)}.format-btn{flex:1;padding:7px 10px;background:var(--color-surface-alt);border:none;color:var(--color-text-muted);font-size:13px;font-weight:500;cursor:pointer;transition:background .15s,color .15s}.format-btn:first-child{border-right:1px solid var(--color-border)}.format-btn.active{background:var(--color-accent);color:#fff}.format-btn:not(.active):hover{background:var(--color-border);color:var(--color-text)}.quality-group{display:flex;flex-direction:column;gap:6px}.quality-group.hidden{display:none}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--color-text-muted)}.loading-hint{grid-column:1 / -1;text-align:center;padding:16px 0}@media(max-width:900px){.app-layout{grid-template-columns:1fr;grid-template-rows:auto 1fr auto}.panel-left,.panel-right{border-right:none;border-left:none;border-bottom:1px solid var(--color-border)}.panel-center{min-height:50vh}}