:root{color-scheme:light dark}body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at top,#0b1227 0,#0f172a 70%);color:#e5e7eb}main{width:min(920px,94vw);border:1px solid #334155;border-radius:14px;background:#111827;padding:24px}h1{margin:0;font-size:1.8rem}p{color:#9ca3af;margin-top:8px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:10px;margin-top:12px}label{font-size:.9rem;color:#cbd5e1}button,input,select,textarea{width:100%;box-sizing:border-box;border-radius:10px;border:1px solid #334155;background:#0b1220;color:#e5e7eb;padding:10px;font-size:.95rem}button{cursor:pointer;background:#1f2937;font-weight:600}button:hover{border-color:#38bdf8}.actions{display:flex;gap:10px;margin-top:12px}.result{margin-top:12px;padding:12px;border-radius:10px;border:1px solid #334155;background:#0b1220;white-space:pre-wrap}a{color:#93c5fd;text-decoration:none}a:hover{text-decoration:underline}.seo-content{margin-top:14px;padding:12px;border:1px solid #334155;border-radius:10px;background:#0b1220}.seo-content h2{margin:0 0 8px;font-size:1rem;color:#cbd5e1}.seo-content p{margin:6px 0;color:#9ca3af;line-height:1.5}