body {
    background: linear-gradient(135deg, #c1dff7, #141C3C);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}
.container{
    width: 100%;
}
.card {
    border-radius: 15px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}
.card-header {
    background-color: #141C3C; 
    color: white;
    border-top-left-radius: 15px;
    border-top-right-radius: 15px;
    text-align: center;
    font-size: 24px;
    font-weight: bold;
}
.btn-primary {
    background-color: #141C3C;
    border-color: #fff;
    border-radius: 25px;
}

/* Media queries */

/* Para pantallas móviles (ancho inferior a 576px) */
@media (max-width: 575.98px) {
    .container {
        padding: 15px;
    }

    .card {
        width: 100%;
    }

    .card-header {
        font-size: 20px;
    }

    .btn-primary {
        font-size: 16px;
    }

    .form-control {
        font-size: 14px;
    }
}

/* Para pantallas medianas, como tabletas (576px a 768px) */
@media (min-width: 576px) and (max-width: 767.98px) {
    .container {
        padding: 20px;
    }

    .card {
        width: 80%;
    }

    .card-header {
        font-size: 22px;
    }

    .btn-primary {
        font-size: 18px;
    }

    .form-control {
        font-size: 15px;
    }
}

/* Para pantallas grandes (ancho superior a 768px) */
@media (min-width: 768px) {
    .container {
        max-width: 600px;
    }

    .card {
        width: 100%;
    }

    .card-header {
        font-size: 24px;
    }

    .btn-primary {
        font-size: 20px;
    }

    .form-control {
        font-size: 16px;
    }
}