body{
    margin:0;
    font-family:Arial, Helvetica, sans-serif;
    background:#eef3f8;
    color:#1f2937;
}
 
header{
    background:#1e3a5f;
    color:white;
    text-align:center;
    padding:40px 20px;
}
 
header h1{
    margin:0;
    font-size:42px;
}
 
header p{
    margin:8px 0;
    font-size:18px;
}
 
main{
    max-width:700px;
    margin:40px auto;
    background:white;
    padding:40px;
    border-radius:15px;
    box-shadow:0 10px 30px rgba(0,0,0,0.15);
}
 
h2{
    text-align:center;
    margin-bottom:30px;
}
 
button{
    width:100%;
    padding:18px;
    margin:12px 0;
    font-size:20px;
    border:none;
    border-radius:10px;
    cursor:pointer;
    background:#2563eb;
    color:white;
    transition:0.3s;
}
 
button:hover{
    background:#1d4ed8;
}