*{box-sizing:border-box}body{margin:0;padding:14px;background:#0f172a;color:#e5e7eb;font:16px Arial,sans-serif}.hidden{display:none!important}.login-screen{min-height:95vh;display:grid;place-items:center}.panel{background:#111827;border:1px solid #334155;border-radius:16px;padding:18px;margin:12px 0;min-width:0}h1{font-size:clamp(1.4rem,5vw,2rem)}p,small{color:#94a3b8;overflow-wrap:anywhere}input,select,button{width:100%;padding:12px;border-radius:10px;margin:6px 0;font-size:1rem}input,select{background:#0b1220;color:#fff;border:1px solid #475569}button{background:#2563eb;color:white;border:0;font-weight:bold}header{max-width:1100px;margin:auto;display:flex;justify-content:space-between;gap:14px;align-items:center}main{max-width:1100px;margin:auto}.actions{display:flex;gap:8px;min-width:180px}.summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.summary strong{display:block;font-size:1.5rem;margin-top:10px}.signal,.history{padding:12px;background:#1f2937;border-radius:12px;margin:8px 0;overflow-wrap:anywhere}.buy{color:#22c55e}.sell{color:#ef4444}.flat{color:#f59e0b}.chart{height:280px}#appError,#loginError{color:#fca5a5}@media(max-width:650px){header{display:block}.actions{min-width:0}.summary{grid-template-columns:1fr}.chart{height:240px}}