.container{padding:1rem;max-width:600px;margin:auto;font-family:sans-serif;display:flex;flex-direction:column;height:100vh;box-sizing:border-box}h2{text-align:center;margin-bottom:1rem}.input{padding:.75rem;font-size:1rem;border-radius:10px;border:1px solid #ccc}.chatBox{flex:1 1;overflow-y:auto;border:1px solid #ddd;padding:.5rem;background:#f9f9f9;border-radius:10px}.chatBox,.message{margin-bottom:1rem}.message{word-wrap:break-word}.preview img{max-width:100%;border-radius:8px;margin-top:.5rem}.controls{display:flex;flex-direction:column;gap:.5rem}.textarea{resize:none;height:80px;padding:.5rem;font-size:1rem;border-radius:10px;border:1px solid #ccc}.file{font-size:.9rem}.button{background-color:#0070f3;color:#fff;padding:.75rem;font-size:1rem;border:none;border-radius:10px;cursor:pointer;transition:background-color .2s}.button:disabled{background-color:#999}