body{font-family:system-ui;background:#0f172a;color:#e2e8f0;margin:0}header{background:#1e293b;padding:1rem;display:flex;justify-content:space-between}main{padding:1rem;display:grid;gap:1rem}table{width:100%;border-collapse:collapse}th,td{padding:.5rem;border-bottom:1px solid #334155}.BUY{color:#22c55e}.SELL{color:#ef4444}.login{max-width:300px;margin:10% auto;background:#1e293b;padding:2rem;border-radius:8px}input,button{width:100%;margin:.5rem 0;padding:.7rem;border:none;border-radius:4px}button{background:#22c55e;color:#000;font-weight:bold}