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var(--border);border-radius:var(--radius-sm);background:#fff;color:var(--text);outline:none;cursor:pointer}select:focus{border-color:var(--border-focus)}.size-badge{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:20px;font-size:.8125rem;font-weight:600}.size-badge.original{background:#fef3c7;color:#92400e}.size-badge.compressed{background:var(--success-light);color:var(--success)}.canvas-wrapper{position:relative;display:inline-block;border-radius:var(--radius-sm);overflow:hidden;box-shadow:var(--shadow-md);cursor:crosshair;max-width:100%}.canvas-wrapper img,.canvas-wrapper canvas{display:block;max-width:100%;height:auto}.selection-box{position:absolute;border:2px solid var(--primary);background:#4f46e526;pointer-events:none}.alert{padding:12px 16px;border-radius:var(--radius-sm);font-size:.875rem;display:flex;align-items:center;gap:8px}.alert-info{background:#eff6ff;color:#1e40af;border:1px solid #BFDBFE}.alert-success{background:var(--success-light);color:var(--success);border:1px solid #A7F3D0}.alert-error{background:var(--danger-light);color:var(--danger);border:1px solid #FECACA}@media (max-width: 768px){html{font-size:15px}.container{padding:0 12px}.ad-banner{height:60px}.main-layout{flex-direction:column}.ad-sidebar{width:100%;min-height:100px}}@media (max-width: 480px){html{font-size:14px}.container{padding:0 8px}.btn{padding:12px 20px;font-size:1rem;min-height:44px}.btn-sm{padding:8px 14px;font-size:.875rem;min-height:36px}.drop-zone{padding:32px 16px}.drop-zone-icon{font-size:2.5rem}.drop-zone-title{font-size:1rem}input[type=range]{height:8px}input[type=range]::-webkit-slider-thumb{width:24px;height:24px}select{padding:10px 12px;min-height:44px}}.btn,.nav-tab,.method-option,.preset-btn,.drop-zone{touch-action:manipulation;-webkit-tap-highlight-color:transparent}.canvas-wrapper,.main-canvas{user-select:none;-webkit-user-select:none}