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

body{
    background:#f1f3f4;
    min-height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
    padding:20px;
}

.container{
    width:100%;
    max-width:420px;
}

.card{
    background:#ffffff;
    border-radius:14px;
    padding:40px 35px;
    text-align:center;
    box-shadow:0 4px 30px rgba(0,0,0,0.08);
    border:1px solid #e5e7eb;
}

.logo{
    width:70px;
    height:70px;
    margin:0 auto 20px;
    background:#2563eb;
    border-radius:50%;
    display:flex;
    justify-content:center;
    align-items:center;
    color:white;
    font-size:28px;
    font-weight:bold;
}

h1{
    font-size:28px;
    color:#111827;
    margin-bottom:15px;
}

p{
    color:#6b7280;
    font-size:15px;
    line-height:1.7;
    margin-bottom:30px;
}

.loading{
    margin-top:20px;
    color:#16a34a;
    font-weight:600;
    display:none;
}

.security-note{
    margin-top:25px;
    font-size:13px;
    color:#9ca3af;
}

.spinner{
    width:40px;
    height:40px;
    border:4px solid #dbeafe;
    border-top:4px solid #2563eb;
    border-radius:50%;
    margin:20px auto 0;
    animation:spin 1s linear infinite;
    display:none;
}

@keyframes spin{
    100%{
        transform:rotate(360deg);
    }
}

@media(max-width:500px){

    .card{
        padding:30px 22px;
    }

    h1{
        font-size:24px;
    }
}