.btn{background-color:var(--accent);color:white;padding:12px 24px;border-radius:var(--radius);border:none;font-size:1rem;cursor:pointer;box-shadow:0 4px 8px rgba(0,0,0,.1);transition:background-color .3s,box-shadow .3s}.btn:hover{background-color:var(--hover);box-shadow:0 6px 12px rgba(0,0,0,.1)}