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

body{
    min-height:100vh;
    background:#0f172a;
    display:flex;
    justify-content:center;
    align-items:center;
    padding:20px;
}

.login-container,
.panel-container{
    width:100%;
    max-width:900px;
}

.login-box,
.panel-container{
    background:#111827;
    padding:40px;
    border-radius:20px;
    box-shadow:0 10px 30px rgba(0,0,0,.4);
}

.login-box h2,
.panel-container h1{
    color:#facc15;
    text-align:center;
    margin-bottom:30px;
}

.login-box input{
    width:100%;
    padding:15px;
    margin-bottom:20px;
    border:none;
    border-radius:10px;
    background:#1e293b;
    color:white;
    outline:none;
}

.login-box button,
.btn-panel{
    width:100%;
    padding:15px;
    border:none;
    border-radius:10px;
    background:#facc15;
    color:black;
    font-weight:bold;
    text-decoration:none;
    display:flex;
    justify-content:center;
    align-items:center;
    cursor:pointer;
    transition:.3s;
}

.login-box button:hover,
.btn-panel:hover,
.panel-card:hover{
    transform:translateY(-5px);
}

.volver{
    display:block;
    margin-top:20px;
    text-align:center;
    color:#cbd5e1;
    text-decoration:none;
}

.error{
    background:#7f1d1d;
    color:white;
    padding:12px;
    border-radius:10px;
    margin-bottom:20px;
    text-align:center;
}

.panel-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
    gap:25px;
    margin-top:40px;
}

.panel-card{
    background:#1e293b;
    color:#facc15;
    padding:50px 20px;
    border-radius:20px;
    text-decoration:none;
    text-align:center;
    font-size:1.3rem;
    font-weight:bold;
    transition:.3s;
}

.acciones-panel{
    display:flex;
    gap:20px;
    margin-top:40px;
}

.salir-btn{
    background:#dc2626;
    color:white;
}

@media(max-width:768px){

    .acciones-panel{
        flex-direction:column;
    }

    .login-box,
    .panel-container{
        padding:30px 20px;
    }

}