:root{--bg:#f5f6f8;--surface:#fff;--text:#1a1a2e;--muted:#6b7280;--border:#e5e7eb;--primary:#4f46e5;--primary-hover:#4338ca;--danger:#dc2626;--ok:#059669;--radius:12px;--gap:16px}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}h1{margin:0;font-size:1.4rem}a{color:var(--primary)}.muted{color:var(--muted)}.small{font-size:.85rem}.btn{border-radius:var(--radius);cursor:pointer;border:1px solid #0000;justify-content:center;align-items:center;gap:6px;padding:10px 16px;font-size:.95rem;font-weight:500;transition:background .15s,border-color .15s;display:inline-flex}.btn:disabled{opacity:.55;cursor:default}.btn-sm{padding:6px 12px;font-size:.85rem}.btn-primary{background:var(--primary);color:#fff}.btn-primary:not(:disabled):hover{background:var(--primary-hover)}.btn-ghost{color:var(--text);border-color:var(--border);background:0 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