@cn-ui/core/dist/lib/select/index.css

The @cn-ui/core is a collection of UI components and utilities for building modern web applications with SolidJS.

/* selected rounded corners style  */
.cn-select-option.cn-selected:not(.cn-select-option.disabled):has(
        + .cn-select-option.cn-selected:not(.cn-select-option.disabled)
    ) {
    border-end-start-radius: 0;
    border-end-end-radius: 0;
}

.cn-select-option.cn-selected:not(.cn-select-option.disabled):has(
        + .cn-select-option.cn-selected:not(.cn-select-option.disabled)
    )
    + .cn-select-option.cn-selected:not(.cn-select-option.disabled) {
    border-start-start-radius: 0;
    border-start-end-radius: 0;
}
.cn-select-input input[readonly]{
    cursor: pointer;
}