:root{--bg: #0b1220;--card: #121a2b;--muted: #8aa0b8;--text: #eaf2ff;--accent: #4f82ff;--accent-2: #71d37f;--danger: #ff6b6b;--radius: 16px}*{box-sizing:border-box}html,body{height:100%}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);background:radial-gradient(1200px 600px at 20% -10%,#1f2a44 0%,transparent 60%),var(--bg)}.container{max-width:720px;margin:0 auto;padding:24px}.header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:16px}.brand{display:flex;align-items:center;gap:12px;font-weight:700;letter-spacing:.2px}.brand .dot{width:10px;height:10px;border-radius:50%;background:var(--accent-2);display:inline-block}.card{background:linear-gradient(180deg,#ffffff05,#fff0),var(--card);border-radius:var(--radius);border:1px solid rgba(255,255,255,.08);box-shadow:0 10px 30px #00000059;padding:20px;margin-top:20px}.row{display:grid;grid-template-columns:1fr;gap:12px}@media (min-width: 560px){.row{grid-template-columns:1fr auto}}label{color:var(--muted);font-size:13px}select,input,button{width:100%;padding:12px 14px;font-size:16px;border-radius:12px;border:1px solid rgba(255,255,255,.12);background:#ffffff08;color:var(--text);outline:none}input::placeholder{color:#a5b7cf}button{background:linear-gradient(180deg,#4f82ff40,#4f82ff0d);border-color:#4f82ff80;cursor:pointer}button:hover{transform:translateY(-1px)}.badge{display:inline-block;padding:4px 8px;border-radius:999px;background:#4f82ff26;border:1px solid rgba(79,130,255,.4);color:var(--text);font-size:12px}.output{margin-top:14px;padding:14px;background:#ffffff0a;border-radius:12px;white-space:pre-wrap;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:#dfe9ff}.footer{margin-top:28px;color:var(--muted);font-size:12px;text-align:center}.flex{display:flex;gap:8px;align-items:center}.right{text-align:right}.hidden{display:none}