body{margin:0;background:#080b12;color:#eee;font:16px Arial}main{max-width:850px;margin:auto;padding:20px}.signal,section{background:#111824;border:1px solid #273143;border-radius:16px;padding:20px;margin:14px 0}.signal{text-align:center}.signal #signal{font-size:42px;font-weight:900;margin:12px}.buttons{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:12px}button{padding:15px;border-radius:10px;border:1px solid #39445a;background:#192231;color:white;font-weight:800;cursor:pointer}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;background:none;border:0;padding:0}.stats div{text-align:center;background:#111824;border:1px solid #273143;border-radius:12px;padding:14px}.stats strong{display:block;font-size:24px;margin-top:5px}#hist{display:flex;flex-wrap:wrap;gap:6px}.chip{padding:8px;border-radius:8px;background:#222}input{width:100%}@media(max-width:600px){.buttons,.stats{grid-template-columns:1fr 1fr}.buttons button:last-child{grid-column:1/-1}}