/* Per day field specific styling */
.rnb-select.wpfc-error,
.rental-per-day.wpfc-error,
.per-day-field.wpfc-error {
    border: 2px solid #ff4444 !important;
    background-color: #fff8f8 !important;
}

/* Highlight per day field */
.rnb-select,
.rental-per-day,
.per-day-field {
    transition: all 0.3s ease;
}

.rnb-select:focus,
.rental-per-day:focus,
.per-day-field:focus {
    border-color: #2196F3 !important;
    box-shadow: 0 0 5px rgba(33, 150, 243, 0.3) !important;
}

/* Instruction message */
.wpfc-perday-instruction {
    font-size: 12px;
    color: #666;
    margin-top: 5px;
    padding: 5px;
    background: #f5f5f5;
    border-radius: 3px;
}

/* Button disabled state */
.single_add_to_cart_button.button.alt.rnb-pro-add-to-cart.wpfc-disabled,
.single_add_to_cart_button.button.alt.rnb-pro-add-to-cart:disabled {
    opacity: 0.5 !important;
    cursor: not-allowed !important;
    pointer-events: none !important;
    background-color: #cccccc !important;
    border-color: #aaaaaa !important;
}