.sd-container{
max-width:800px;
margin:40px auto;
background:#fff;
padding:30px;
border-radius:8px;
box-shadow:0 10px 30px rgba(0,0,0,0.08);
}

.sd-row{display:flex;gap:10px;margin-bottom:15px;}

.sd-row input{flex:1;padding:12px;}

.sd-btn{
width:100%;
padding:14px;
background:#2c6df2;
color:#fff;
border:none;
cursor:pointer;
}

.sd-error{color:red;display:none;margin-top:10px;}

.sd-result{
margin-top:50px;
padding:20px;
background:#f5f7fb;
display:none;
}

@media(max-width:600px){
.sd-row{flex-direction:column;}
}