:root{--bg: #fbfdff;--surface: #f3f7fb;--text: #0b1220;--muted: #5b6f82;--primary: #2f6fed;--accent: #26c89f;--card: #ffffff;--radius: 14px}[data-theme=dark]{--bg: #07101a;--surface: #0b1620;--text: #eaf4ff;--muted: #9fb0c8;--primary: #66a9ff;--accent: #4ae0a4;--card: #071722}*{box-sizing:border-box}html,body,#root{height:100%}body{font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial;margin:0;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-size:17px}.container{max-width:1100px;margin:0 auto;padding:48px 20px}.site-header{background:linear-gradient(180deg,var(--surface),transparent);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border-bottom:1px solid rgba(15,23,35,.04)}.header-inner{display:flex;align-items:center;gap:18px}.brand{font-weight:800;font-size:20px;letter-spacing:.2px}.nav{display:flex;gap:18px}.nav a{color:var(--muted);text-decoration:none;padding:8px;border-radius:10px}.nav 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