:root{--bg:#f6f7f9;--surface:#fff;--border:#e3e6ec;--text:#1f2430;--muted:#6b7385;--primary:#2f6fed;--primary-dark:#245bd0;--danger:#d64545;--radius:10px;--shadow:0 1px 2px #141b2d0f, 0 8px 24px #141b2d0f;color:var(--text);font-family:Segoe UI,Inter,system-ui,-apple-system,sans-serif}*{box-sizing:border-box}html,body,#app{height:100%;margin:0}body{background:var(--bg);font-size:15px;line-height:1.45}a{color:var(--primary);text-decoration:none}button,input,select{font:inherit;color:inherit}button{cursor:pointer}.btn{border:1px solid var(--border);background:var(--surface);white-space:nowrap;border-radius:8px;align-items:center;gap:6px;padding:8px 14px;transition:border-color .15s,background .15s,color .15s;display:inline-flex}.btn:hover{background:#fbfcfe;border-color:#c9cee0}.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark)}.btn-ghost{background:0 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