@keyframes pulse-red {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%       { opacity: 0.6; transform: scale(1.2); }
}

/* Strategy dropdown group headers */
[data-theme="dark"] .ssi-dropdown-custom .Select-option[aria-disabled="true"],
[data-theme="dark"] .ssi-dropdown-custom .VirtualizedSelectOption[aria-disabled="true"] {
    color: #58a6ff !important;
    font-size: 10px !important;
    font-weight: 700 !important;
    letter-spacing: 0.8px !important;
    background-color: #0d1117 !important;
    cursor: default !important;
    padding-top: 10px !important;
    border-top: 1px solid #21262d !important;
}

/* ☀️ Light mode — trước đây file này chỉ có màu tối, dropdown group
   header bị "kẹt" nền đen khi chuyển sang chế độ sáng */
[data-theme="light"] .ssi-dropdown-custom .Select-option[aria-disabled="true"],
[data-theme="light"] .ssi-dropdown-custom .VirtualizedSelectOption[aria-disabled="true"] {
    color: var(--accent) !important;
    font-size: 10px !important;
    font-weight: 700 !important;
    letter-spacing: 0.8px !important;
    background-color: var(--bg-surface) !important;
    cursor: default !important;
    padding-top: 10px !important;
    border-top: 1px solid var(--border-subtle) !important;
}