.acv2-box {
  background:#0b63c7; color:#fff; padding:20px;
  max-width:400px; margin:30px auto; border-radius:10px;
  box-shadow:0 0 10px rgba(0,0,0,0.2);
}
.acv2-box h2 { text-align:center; margin-top:0; }
.acv2-box input { width:100%; padding:8px; margin:8px 0; border:none; border-radius:5px; }
.acv2-buttons { text-align:center; }
.acv2-buttons button {
  margin:5px; padding:10px 15px; border:none; border-radius:6px;
  cursor:pointer; color:#fff;
}
#acv2_calc { background:#063f99; }
#acv2_reset { background:#999; }
.acv2-msg { background:#fff; color:#0b63c7; padding:10px; border-radius:6px; margin-top:10px; font-weight:bold; }
.acv2-error { background:#fff; color:#c00; padding:10px; border-radius:6px; margin-top:10px; }