:root{--bg: #0d1018;--panel: #151a26;--panel-2: #1b2233;--line: #2a3346;--text: #e8edff;--muted: #8b96b0;--accent: #5b8def}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}.layout-root{display:flex;flex-direction:column;height:100%}.layout-content{flex:1;overflow:hidden;display:flex;flex-direction:column}.app-header{height:44px;display:flex;align-items:center;gap:24px;padding:0 20px;background:var(--panel);border-bottom:1px solid var(--line);flex-shrink:0}.app-header-brand{display:flex;align-items:baseline;gap:8px;text-decoration:none;color:var(--text)}.app-header-brand strong{font-size:16px;letter-spacing:.5px}.app-header-brand span{font-size:11px;color:var(--muted)}.app-header-nav{display:flex;gap:4px}.header-link{padding:4px 10px;border-radius:6px;font-size:13px;color:var(--muted);text-decoration:none}.header-link:hover,.header-link.active{color:var(--text);background:var(--panel-2)}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Hiragino 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