.select2-container--open .select2-dropdown {
position: relative !important;
width: 100% !important;
left: 0 !important;
top: auto !important;
z-index: 99999 !important;
max-height: 300px;
overflow-y: auto;
background: #fff;
border: 1px solid #ccc;
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}