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

body{
    background:#eef2f7;
    display:flex;
    justify-content:center;
    align-items:center;
    min-height:100vh;
}

.contenedor{
    max-width:400px;
    margin:auto;
}

.contenedor-flex{
    display:flex;
    justify-content:center;
    align-items:center;
}

.login{
    width:420px;
    background:white;
    padding:40px;
    border-radius:18px;
    box-shadow:0 10px 25px rgba(0,0,0,.15);
}

.login h1{
    text-align:center;
    color:#0b1c62;
    margin-bottom:8px;
}

.login h2{
    text-align:center;
    color:#0b1c62;
    margin-bottom:8px;
}

.login hr{
    margin-bottom:25px;
    border:none;
    border-top:1px solid #ddd;
}

.login label{
    display:block;
    margin-bottom:8px;
    margin-top:18px;
    font-weight:bold;
    color:#333;
}

.login input{
    width:100%;
    padding:12px;
    border:1px solid #d8d8d8;
    border-radius:8px;
    font-size:15px;
    transition:.3s;
    background:#f2f2f2;
}

.login input:focus{
    outline:none;
    border-color:#0b1c62;
    box-shadow:0 0 5px rgba(11,28,98,.3);
}

#btnIngresar{
    width:100%;
    margin-top:25px;
    padding:14px;
    border:none;
    border-radius:8px;
    background:#01011c;
    color:white;
    font-size:16px;
    cursor:pointer;
    transition:.3s;
}

#btnIngresar:hover{
    background:#1b2fa5;
}

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

.correcto{
    color:#2e7d32;
}

.error{
    color:#c62828;
}

@media(max-width:500px){
    .login{
        width:90%;
        padding:30px;
    }
}