*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family:Arial,sans-serif;
}

body{
  background:#0f172a;
  color:white;
  min-height:100vh;
  display:flex;
  justify-content:center;
  align-items:center;
  padding:20px;
}

.container{
  width:100%;
  max-width:700px;
  background:#111827;
  padding:25px;
  border-radius:18px;
  box-shadow:0 0 30px rgba(0,0,0,0.4);
}

h1{
  text-align:center;
  margin-bottom:20px;
  font-size:32px;
  color:#60a5fa;
}

form{
  display:flex;
  flex-direction:column;
  gap:15px;
}

textarea{
  width:100%;
  height:320px;
  background:#1f2937;
  border:none;
  border-radius:12px;
  padding:15px;
  color:white;
  resize:vertical;
  font-size:14px;
  line-height:1.5;
}

textarea:focus{
  outline:2px solid #3b82f6;
}

button{
  padding:14px;
  border:none;
  border-radius:12px;
  background:#2563eb;
  color:white;
  font-size:16px;
  font-weight:bold;
  cursor:pointer;
  transition:0.3s;
}

button:hover{
  background:#1d4ed8;
}

pre{
  margin-top:20px;
  background:#0b1220;
  border:1px solid #1e293b;
  border-radius:12px;
  padding:15px;
  overflow-x:auto;
  white-space:pre-wrap;
  word-wrap:break-word;
  font-size:14px;
  line-height:1.6;
}

@media(max-width:600px){

  h1{
    font-size:24px;
  }

  textarea{
    height:260px;
  }

}