:root{--bg: #0b0b0c;--panel: #111214;--muted: #777;--accent: #4d7dff}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,Arial;background:var(--bg);color:#eee}.app{max-width:980px;margin:32px auto;padding:0 16px}h1{margin:0 0 16px}h2{margin:0 0 12px;color:#ddd}h3{margin:20px 0 8px;color:#ddd}.card{background:var(--panel);border:1px solid #222;border-radius:14px;padding:16px;margin:16px 0}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}label{display:block;font-size:12px;color:#bbb;margin-bottom:6px}input,select{width:100%;padding:8px 10px;border-radius:8px;border:1px solid #333;background:#0f1113;color:#eee;outline:none}input:focus,select:focus{border-color:var(--accent)}.results{background:#0f1113;border:1px solid #242424;border-radius:12px;padding:12px}pre{background:#0b0c0f;padding:12px;border-radius:12px;overflow:auto}.buttons{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}.button,button{display:inline-flex;align-items:center;gap:8px;padding:10px 12px;border-radius:10px;background:#1a1d22;border:1px solid #2a2d33;color:#eee;text-decoration:none;cursor:pointer}.button:hover,button:hover{border-color:#3a3f47}.hint{color:#8a8a8a;font-size:12px;margin-top:8px}