[data-role=user]{background-color:var(--bg-card);border-radius:.75rem;box-shadow:var(--shadow-md);.prose{max-width:100%}}[data-role=assistant]{background-color:var(--bg-secondary);border-radius:.75rem}.chat-input textarea{min-height:44px!important;max-height:200px;transition:height .2s ease}.chat-input textarea:placeholder-shown{height:auto!important;min-height:44px!important}