:root{--bg: #f4f6fb;--surface: #ffffff;--surface-2: #f7f9ff;--border: #d9dfef;--text: #18213d;--muted: #66749c;--primary: #4e63ff;--primary-hover: #3f52ef;--success: #1fa97c;--error: #e54e6f;--radius: 16px}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:radial-gradient(1200px 420px at 50% -220px,rgba(78,99,255,.14),transparent 70%),var(--bg);color:var(--text);line-height:1.5;-webkit-font-smoothing:antialiased}.app{min-height:100%;display:flex;flex-direction:column;position:relative}.header{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;border-bottom:1px solid rgba(24,33,61,.07);background:#f4f6fbf5;position:sticky;top:0;z-index:20}.brand{margin:0;font-size:1.2rem;font-weight:800;letter-spacing:-.02em}.brand-subtitle{margin:2px 0 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