/* Estilos básicos dark/modern */
:root{
  --bg:#0f1720;
  --card:#111827;
  --muted:#9ca3af;
  --accent:#4f46e5;
  --glass: rgba(255,255,255,0.03);
}
body{background:var(--bg);color:#e6edf3;font-family:Inter,ui-sans-serif,system-ui,Arial; margin:0;padding:20px;}
.container{max-width:1000px;margin:0 auto;}
header{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;}
h1{font-size:20px;margin:0;}
#tx-form{display:flex;gap:8px;flex-wrap:wrap;background:var(--card);padding:12px;border-radius:8px;}
#tx-form input,#tx-form select{background:var(--glass);border:1px solid rgba(255,255,255,0.03);padding:8px;border-radius:6px;color:inherit;}
button{background:var(--accent);border:none;padding:8px 12px;border-radius:6px;color:white;cursor:pointer;}
#tx-list{margin-top:10px;background:var(--card);padding:12px;border-radius:8px;}
footer{margin-top:20px;text-align:center;color:var(--muted);}