Unintended but mindless action resulted in death of a living thing

I am very new to Buddhism and am learning the teachings, so I am reaching out. I avoid hurting any living thing at all cost, but this morning while walking my dogs I was texting and I crushed a snail. My heart broke the moment it happened and I felt ill. I know it was not intentional, and I mourned the loss of life, but it happened while I was distracted and not mindful. I still feel it so deep. So I guess I have a couple of questions. What are the implications of this action? And how do I correct this wrong?