*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{
    font-family: Arial, Helvetica, sans-serif;
    min-height:100vh;
    background:
        radial-gradient(circle at top, rgba(212,175,55,0.14), transparent 35%),
        linear-gradient(135deg, #050505 0%, #0c0c0c 45%, #111111 100%);
    color:#f5f5f5;
    display:flex;
    align-items:center;
    justify-content:center;
    padding:20px;
}

.login-wrapper{
    width:100%;
    max-width:460px;
}

.login-card{
    background:rgba(10,10,10,0.96);
    border:1px solid rgba(212,175,55,0.35);
    border-radius:22px;
    padding:38px 34px;
    box-shadow:0 0 30px rgba(0,0,0,0.45), 0 0 20px rgba(212,175,55,0.08);
}

.brand-area{
    text-align:center;
    margin-bottom:28px;
}

.logo{
    width:130px;
    max-width:100%;
    margin:0 auto 14px;
}

.brand-area h1{
    font-size:30px;
    letter-spacing:1px;
    color:#d4af37;
    margin-bottom:8px;
    font-weight:600;
}

.brand-area p{
    color:#f1f1f1;
    font-size:14px;
}

.alerta-error{
    background:rgba(120,20,20,0.30);
    border:1px solid rgba(255,130,130,0.35);
    color:#ffffff;
    padding:12px 14px;
    border-radius:12px;
    margin-bottom:18px;
    font-size:14px;
    text-align:center;
}

.login-form .form-group{
    margin-bottom:18px;
}

.login-form label{
    display:block;
    margin-bottom:8px;
    color:#f3f3f3;
    font-size:14px;
    font-weight:bold;
}

.login-form input{
    width:100%;
    height:48px;
    border:1px solid rgba(212,175,55,0.28);
    border-radius:12px;
    outline:none;
    padding:0 14px;
    font-size:15px;
    background:#151515;
    color:#ffffff;
    transition:all .25s ease;
}

.login-form input:focus{
    border-color:#d4af37;
    box-shadow:0 0 0 3px rgba(212,175,55,0.12);
}

.btn-login{
    width:100%;
    height:50px;
    border:none;
    border-radius:12px;
    background:linear-gradient(90deg,#b88919,#d4af37,#f0d77a);
    color:#111;
    font-size:16px;
    font-weight:bold;
    cursor:pointer;
    margin-top:8px;
}

.login-footer{
    margin-top:22px;
    text-align:center;
    font-size:12px;
    color:#f0f0f0;
}

@media (max-width:520px){
    .login-card{
        padding:28px 22px;
        border-radius:18px;
    }

    .brand-area h1{
        font-size:25px;
    }

    .logo{
        width:105px;
    }
}