:root{--ink: #18212f;--muted: #5d6674;--accent: #2563eb;--accent-dark: #1d4ed8;--bg: #eef1f6;--card: #ffffff;--rule: #e2e6ec;--radius: 10px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-size:14px;line-height:1.45}.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;padding:12px 24px;background:#ffffffeb;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--rule)}.brand{display:flex;align-items:center;gap:8px;color:inherit;text-decoration:none}.brand-icon{color:var(--accent)}.brand-name{font-size:17px;font-weight:700;letter-spacing:-.02em}.brand-tag{margin-left:8px;font-size:12px;color:var(--muted);border-left:1px solid var(--rule);padding-left:12px}.topbar-actions{display:flex;gap:10px}.btn{border:none;border-radius:8px;padding:9px 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