:root{--bg:#0f172a;--card:#1e293b;--fg:#f1f5f9;--muted:#94a3b8;--accent:#22c55e;--danger:#f87171}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font-family:system-ui,sans-serif;min-height:100vh}main{max-width:520px;margin:0 auto;padding:24px 16px 48px}h1{font-size:1.6rem;margin:0 0 8px}p{color:var(--muted);line-height:1.5}.card{background:var(--card);border-radius:16px;padding:20px;margin-top:20px}label{display:block;font-size:.9rem;margin:14px 0 6px}input[type=file],input[type=text]{width:100%;padding:12px;border-radius:10px;border:1px solid #334155;background:#0f172a;color:var(--fg);font-size:1rem}.btn,button{display:inline-block;width:100%;margin-top:18px;padding:14px;border:0;border-radius:12px;background:var(--accent);color:#052e16;font-weight:700;font-size:1rem;cursor:pointer;text-align:center;text-decoration:none}button:disabled{opacity:.6}.err{color:var(--danger);margin-top:12px}.copy{word-break:break-all;background:#0f172a;padding:10px;border-radius:10px;font-size:.9rem;color:var(--fg)}.hero{width:100%;border-radius:14px;display:block;margin-bottom:16px}.ping{padding:12px 0;border-top:1px solid #334155}.ping:first-child{border-top:0}a{color:#7dd3fc}