:root{--bg: #0f1115;--panel: #171a21;--panel2: #1e222b;--border: #2a2f3a;--text: #e8eaed;--muted: #9aa3af;--accent: #7c5cff;--accent2: #5c8aff;--user: #2b3050;--err: #ff5c6c;--ok: #4cd97b;--sidebar-w: 280px;--chat-w: 1080px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{background:var(--bg);color:var(--text);font:14px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}a{color:var(--accent2)}.app{display:flex;flex-direction:column;height:100vh;height:100dvh}header.top{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:10px 16px;background:var(--panel);border-bottom:1px solid var(--border)}.brand{display:flex;align-items:center;gap:10px;font-size:13px;font-weight:400;margin-right:auto;white-space:nowrap;flex:0 0 auto}.brand img{height:34px;width:auto;display:block}.brand .divider{width:1px;height:24px;background:var(--border)}.brand 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