:root{--bg: #0f1115;--panel: #171a21;--panel-2: #1f242e;--border: #2a313d;--text: #e6e9ef;--muted: #9aa4b2;--accent: #4f8cff;--accent-soft: #23304d;--green: #3fb950;--red: #f85149;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}a{color:var(--accent)}.app{display:flex;height:100vh}.sidebar{width:210px;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:14px 10px;gap:4px;flex-shrink:0}.sidebar h1{font-size:15px;margin:4px 8px 14px}.nav-btn{text-align:left;background:none;border:none;color:var(--muted);padding:9px 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