:root{--bg:#0b0c10;--panel:#111317;--panel-2:#0f1115;--text:#e6e6e6;--muted:#9aa3af;--accent:#4f46e5;--accent-2:#7c3aed;--border:#22252b;--danger:#ef4444}@media (prefers-color-scheme:light){:root{--bg:#f7f7fb;--panel:#fff;--panel-2:#fafafa;--text:#0f1218;--muted:#6b7280;--accent:#3b82f6;--accent-2:#6366f1;--border:#e5e7eb;--danger:#dc2626}}*{box-sizing:border-box}body,html{height:100%}body{margin:0;background:linear-gradient(180deg,var(--bg),var(--panel-2));color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Noto Sans KR,sans-serif;line-height:1.6}.container{max-width:1100px;margin:0 auto;padding:28px 20px 40px}.header{margin-bottom:16px;display:flex;align-items:center;justify-content:space-between;gap:12px}.header h1{margin:0 0 6px;font-weight:700;letter-spacing:-.02em}.header p{margin:0;color:var(--muted)}.actions{display:flex;gap:10px}.actions,.gh{align-items:center}.gh{display:inline-flex;gap:8px;border:1px solid var(--border);padding:8px 12px;border-radius:10px;text-decoration:none;color:var(--text);background:var(--panel)}.gh:hover{border-color:var(--accent);color:var(--accent)}.toolbar{gap:12px;margin:16px 0 18px}.checkbox,.toolbar{display:flex;align-items:center}.checkbox{gap:8px;color:var(--text)}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid var(--border);background:linear-gradient(180deg,var(--accent),var(--accent-2));color:#fff;padding:8px 14px;border-radius:10px;cursor:pointer;font-weight:600}.btn:disabled{opacity:.6;cursor:not-allowed}.grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:16px;gap:16px}@media (max-width:980px){.grid{grid-template-columns:1fr}}.card{background:linear-gradient(180deg,var(--panel),var(--panel-2));border:1px solid var(--border);border-radius:14px;box-shadow:0 10px 30px rgba(0,0,0,.25);overflow:hidden}.card-header{padding:12px 14px;border-bottom:1px solid var(--border);font-weight:600}.card-body{padding:12px}.textarea{height:420px;resize:vertical}.pre,.textarea{width:100%;border:1px solid var(--border);border-radius:10px;background:var(--panel-2);color:var(--text);padding:10px 12px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.pre{margin:0;min-height:420px;white-space:pre-wrap}.error{color:var(--danger)}.hint{color:var(--muted);margin-top:10px;font-size:14px}