:root{--ink:#202020;--paper:#f7f4ee;--panel:#fff;--line:#ddd5c8;--warm:#e8e0d3;--muted:#6f6961;--red:#a9443b;--green:#527358;--blue:#486778;--yellow:#a97d22}*{box-sizing:border-box}html{background:var(--paper)}body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif}button,input,select,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}.app-shell{min-height:100vh;display:grid;grid-template-columns:238px 1fr}.sidebar{height:100vh;position:sticky;top:0;background:var(--ink);color:#fff;padding:24px 18px;display:flex;flex-direction:column}.brand{font-size:22px;font-weight:900;line-height:1.05;letter-spacing:.04em}.brand-sub{font-size:12px;color:#cfc8bd;line-height:1.65;margin:10px 0 24px}.side-nav{display:grid;gap:4px}.side-nav button,.side-actions button,.side-actions a{display:block;width:100%;border:0;background:transparent;color:#ddd;text-align:left;text-decoration:none;padding:11px 13px;border-radius:9px;cursor:pointer}.side-nav button:hover,.side-nav button.active,.side-actions button:hover,.side-actions a:hover{background:#383838;color:#fff}.side-actions{margin-top:auto;border-top:1px solid #444;padding-top:12px}.main{min-width:0;padding:26px 30px 72px}.topbar{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;margin-bottom:18px}.topbar h1{font-size:28px;margin:2px 0 0}.topbar p{font-size:14px;color:var(--muted);margin:7px 0 0}.sync-state{font-size:11px;color:var(--muted)}.sync-state.online:before{content:"";display:inline-block;width:7px;height:7px;background:var(--green);border-radius:50%;margin-right:6px}.sync-state.offline{color:var(--red)}.top-actions{display:flex;gap:8px}.button{border:1px solid var(--ink);background:#fff;color:var(--ink);padding:10px 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