body{
    margin:0;
    font-family: Vazir, sans-serif;
    background:#f3f4f6;
    display:flex;
    justify-content:center;
    padding:40px 10px;
}
.container{
    width:100%;
    max-width:700px;
    background:white;
    padding:30px;
    border-radius:18px;
    box-shadow:0 6px 20px rgba(0,0,0,0.1);
}
h1{
    text-align:center;
    font-size:28px;
    color:#111827;
}
textarea{
    width:100%;
    height:140px;
    padding:15px;
    border-radius:12px;
    border:1px solid #d1d5db;
    font-size:16px;
    resize:none;
}
button{
    width:100%;
    margin-top:15px;
    padding:14px;
    background:#4f46e5;
    color:white;
    font-size:18px;
    border-radius:12px;
    border:none;
    cursor:pointer;
}
button:hover{background:#4338ca;}
.output-box{
    margin-top:25px;
    white-space:pre-wrap;
    background:#f9fafb;
    border-radius:12px;
    padding:20px;
    font-size:16px;
    border:1px solid #e5e7eb;
}