body{
font-family:Arial;
background:#f4f6f5;
margin:0;
}

.container{
max-width:900px;
margin:auto;
padding:20px;
}

h1{
text-align:center;
color:#1fa463;
}

.panel{
background:white;
padding:20px;
border-radius:10px;
box-shadow:0 5px 15px rgba(0,0,0,0.08);
}

input,button{
width:100%;
padding:12px;
margin-top:10px;
border-radius:6px;
border:1px solid #ccc;
}

button{
background:#1fa463;
color:white;
border:none;
font-weight:bold;
cursor:pointer;
}

button:hover{
background:#158a52;
}

.qrBox{
text-align:center;
margin-top:30px;
}

#canvas{
background:white;
display:inline-block;
padding:20px;
border-radius:10px;
}

@media(max-width:600px){
.container{padding:10px;}
}