*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:Arial, Helvetica, sans-serif;
}
body{
    height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
    background:linear-gradient(135deg,#4f46e5,#06b6d4);
}
.box{
    width:100%;
    max-width:380px;
    padding:30px;
    background:white;
    border-radius:12px;
    box-shadow:0 15px 40px rgba(0,0,0,0.2);
}
.logo{
    text-align:center;
    font-size:26px;
    font-weight:bold;
    margin-bottom:10px;
    color:#01184b;
}
.subtitle{
    text-align:center;
    font-size:14px;
    margin-bottom:25px;
    color:#666;
}
.input-group{
    margin-bottom:18px;
}
.input-group label{
    display:block;
    font-size:13px;
    margin-bottom:6px;
    font-weight:bold;
    color:#333;
}
.input-group input{
    width:100%;
    padding:12px;
    border-radius:8px;
    border:1px solid #ddd;
    font-size:14px;
}
.input-group input:focus{
    outline:none;
    border-color:#4f46e5;
}
.btn{
    width:100%;
    padding:12px;
    border:none;
    border-radius:8px;
    background:#4f46e5;
    color:white;
    font-weight:bold;
    font-size:15px;
    cursor:pointer;
}
.alert-ok{
    background:#dcfce7;
    color:#166534;
    border:1px solid #bbf7d0;
    padding:12px 14px;
    border-radius:10px;
    margin-bottom:18px;
    font-size:14px;
}
.alert-error{
    background:#fee2e2;
    color:#991b1b;
    border:1px solid #fecaca;
    padding:12px 14px;
    border-radius:10px;
    margin-bottom:18px;
    font-size:14px;
}
.extra{
    margin-top:18px;
    text-align:center;
    font-size:14px;
}
.extra a{
    color:#4f46e5;
    text-decoration:none;
    font-weight:bold;
}