*{box-sizing:border-box;margin:0;padding:0}body{color:#fff;background:#111;justify-content:center;align-items:center;min-height:100vh;font-family:Arial,sans-serif;display:flex}#app{flex-direction:column;gap:1rem;width:100%;max-width:500px;padding:2rem;display:flex}h1{text-align:center}input{border:none;border-radius:8px;padding:1rem;font-size:1rem}.canvas-container{background:#fff;border-radius:12px;justify-content:center;padding:1rem;display:flex}button{cursor:pointer;border:none;border-radius:8px;padding:1rem;font-size:1rem}