:root{--bg:#05080d;--paper:#0f151e;--ink:#e6edf7;--muted:#8f9db2;--line:#253245;--brand:#22b8cf;--brand-soft:#11343b;--warn:#ff6b6b;--ok:#4ad58f;color:var(--ink);background:var(--bg);font-family:Segoe UI,Trebuchet MS,sans-serif}*{box-sizing:border-box}body{background:radial-gradient(circle at top right, #123141, transparent 42%), radial-gradient(circle at bottom left, #231629, transparent 48%), var(--bg);margin:0}#root{min-height:100vh}.app-shell{grid-template-columns:260px 1fr;min-height:100vh;display:grid}.side-nav{border-right:1px solid var(--line);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#080d14e0;padding:20px}.brand{margin:0 0 18px;font-size:20px}.menu{gap:8px;display:grid}.menu a{color:var(--ink);border-radius:10px;padding:10px 12px;text-decoration:none}.menu a.active{background:var(--brand-soft);color:var(--brand);font-weight:600}.content{gap:16px;padding:24px;display:grid}.panel{background:var(--paper);border:1px solid 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