Help with Select element CSS styles

.field__input, .customer .field input {
    flex-grow: 1;
    text-align: left;
    padding: 1.5rem;
    margin: var(--inputs-border-width);
    transition: box-shadow var(--duration-short) ease;
}
.field__input, .select__select, .customer .field input, .customer select {
    -webkit-appearance: none;
    appearance: none;
    background-color: rgb(var(--color-background));
    color: rgb(var(--color-foreground));
    font-size: 1.6rem;
    width: 100%;
    box-sizing: border-box;
    transition: box-shadow var(--duration-short) ease;
    border-radius: var(--inputs-radius);
    height: 4.5rem;
    min-height: calc(var(--inputs-border-width) * 2);
    min-width: calc(7rem + (var(--inputs-border-width) * 2));
    position: relative;
    border: 0;
}