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

body{

    background:#f3f3f3;

    display:flex;

    justify-content:center;

    padding:40px;
}

.container{

    width:900px;

    background:white;

    padding:35px;

    border-radius:12px;

    box-shadow:0 0 15px rgba(0,0,0,.15);

}

h1{

    text-align:center;

    color:#b3002d;

    margin-bottom:30px;

}

h2{

    margin:25px 0 15px;

    color:#444;

    border-bottom:2px solid #ddd;

    padding-bottom:8px;

}

.grid{

    display:grid;

    grid-template-columns:1fr 1fr;

    gap:20px;

}

.full{

    grid-column:1/3;

}

.input-group{

    display:flex;

    flex-direction:column;

}

label{

    margin-bottom:8px;

    font-weight:bold;

}

input,
select{

    padding:12px;

    border:1px solid #bbb;

    border-radius:6px;

    font-size:15px;

}

input:focus,
select:focus{

    outline:none;

    border-color:#b3002d;

}

button{

    width:100%;

    margin-top:30px;

    background:#b3002d;

    color:white;

    padding:14px;

    border:none;

    border-radius:8px;

    font-size:18px;

    cursor:pointer;

}

button:hover{

    background:#930024;

}

#error{

    color:red;

    margin-top:20px;

    font-weight:bold;

    text-align:center;

}