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

body{
    background:#f4f6f9;
    display:flex;
    justify-content:center;
    align-items:center;
    min-height:100vh;
}

.container{
    width:420px;
    background:white;
    padding:35px;
    border-radius:15px;
    box-shadow:0 10px 30px rgba(0,0,0,.15);
}

h1{
    text-align:center;
    margin-bottom:10px;
}

p{
    text-align:center;
    color:#666;
    margin-bottom:25px;
}

.input-group{
    margin-bottom:18px;
}

label{
    display:block;
    margin-bottom:8px;
    font-weight:bold;
}

input{
    width:100%;
    padding:12px;
    border:1px solid #ccc;
    border-radius:8px;
    font-size:16px;
}

input:focus{
    outline:none;
    border-color:#5a67d8;
}

button{
    width:100%;
    padding:14px;
    border:none;
    background:#5a67d8;
    color:white;
    font-size:17px;
    border-radius:8px;
    cursor:pointer;
    transition:.3s;
}

button:hover{
    background:#4c51bf;
}

button:disabled{
    background:gray;
    cursor:not-allowed;
}

.hidden{
    display:none;
}

#loading{
    margin-top:25px;
    text-align:center;
}

.spinner{
    width:45px;
    height:45px;
    border:5px solid #ddd;
    border-top:5px solid #5a67d8;
    border-radius:50%;
    animation:spin 1s linear infinite;
    margin:auto;
    margin-bottom:15px;
}

@keyframes spin{
    from{
        transform:rotate(0deg);
    }
    to{
        transform:rotate(360deg);
    }
}

#status{
    margin-top:20px;
    text-align:center;
    font-weight:bold;
}