:root{--bg:#fff;--bg-subtle:#fafafa;--bg-hover:#f4f4f5;--border:#e7e7e9;--border-strong:#d4d4d8;--text:#18181b;--text-secondary:#52525b;--text-tertiary:#a1a1aa;--accent:#4f46e5;--accent-soft:#eef2ff;--accent-strong:#4338ca;--danger:#dc2626;--success:#16a34a;--radius:10px;--radius-lg:14px;--shadow-sm:0 1px 2px #18181b0d;--shadow-md:0 4px 16px #18181b14;--shadow-lg:0 12px 40px #18181b1f;--font:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif}*{box-sizing:border-box}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font);color:var(--text);background:var(--bg);margin:0;font-size:15px;line-height:1.55}button,input,textarea,select{font:inherit;color:inherit}.page{max-width:720px;margin:0 auto;padding:0 24px 120px}.topbar{z-index:20;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);background:#ffffffd9;align-items:center;gap:12px;padding:14px 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