.tools-container{background:#fff;flex:1;max-width:720px;min-height:0;overflow-y:auto}.tools-nav{border-bottom:2px solid #dee2e6;gap:4px}.tools-tab-btn{background:transparent;border:1px solid transparent;border-radius:6px 6px 0 0;color:#6c757d;font-size:1rem;font-weight:600;padding:10px 28px}.tools-tab-btn:hover{background:#f3f4f6;color:#0d6efd}.tools-tab-btn.active{background:#0d6efd!important;border-color:#0d6efd;color:#fff!important;margin-bottom:-2px}.tools-section{background:#f3f4f6}.tools-section-title{font-size:.75rem;letter-spacing:.08em}.tools-readonly{background:#e9ecef;color:#6c757d}.tools-code{font-family:monospace;font-size:.85rem}.tools-history-item{border-bottom:1px solid #e2e4e7}