body{
    margin:0;
    padding:0;
    background:#111827;
    color:white;
    font-family:-apple-system,BlinkMacSystemFont,sans-serif;
}

.container{
    max-width:700px;
    margin:auto;
    height:100vh;
    display:flex;
    flex-direction:column;
}

h1{
    text-align:center;
    padding:20px;
}

#chat{
    flex:1;
    overflow:auto;
    padding:15px;
}

.ai{
    background:#1f2937;
    padding:15px;
    border-radius:18px;
    margin-bottom:15px;
}

.user{
    background:#2563eb;
    padding:15px;
    border-radius:18px;
    margin-bottom:15px;
    text-align:right;
}

.input-area{
    display:flex;
    padding:15px;
    gap:10px;
}

input{
    flex:1;
    border:none;
    border-radius:15px;
    padding:15px;
    font-size:16px;
}

button{
    border:none;
    border-radius:15px;
    width:60px;
    font-size:22px;
    cursor:pointer;
}