.qr-tools-container{display:flex;flex-direction:column;height:calc(100vh - 48px)}.qr-tool-tabs{display:flex;background:var(--bg-secondary,#f5f5f5);border-bottom:1px solid var(--border,#ddd);flex-shrink:0}.qr-tool-tab{padding:10px 24px;border:none;background:0 0;cursor:pointer;font-size:14px;font-weight:500;color:var(--text-secondary,#666);border-bottom:2px solid transparent;transition:color .2s,border-color .2s}.qr-tool-tab:hover{color:var(--text,#333)}.qr-tool-tab.active{color:var(--primary,#2563eb);border-bottom-color:var(--primary,#2563eb)}.qr-tool-panel{display:none;flex:1;min-height:0}.qr-tool-panel.active{display:flex}#tool-generate .split-container{flex:1}#tool-scan{overflow-y:auto}#tool-scan .scanner-layout{max-width:700px;margin:0 auto;padding:var(--space-lg,24px);width:100%}