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

body {
    background-image: url('../images/imagen_de_fondo.jpg');
    background-size: cover; /* Esto asegura que la imagen cubra toda la pantalla */
    background-position: center; /* Centra la imagen */
    background-repeat: no-repeat;
    font-family: 'Roboto', sans-serif;
    background-color: #f8f9fa;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
}

.login-form {
    width: 100%;
    max-width: 400px;
    padding: 30px;
    background-color: white;
    border-radius: 15px;
    box-shadow: 0px 5px 20px rgba(0, 0, 0, 0.15);
    margin: 0 15px;
}

.login-branding img {
    max-width: 150px;
    margin-bottom: 20px;
}

h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 20px;
}

.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
    font-size: 1.1rem;
    padding: 12px;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.btn-primary:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}

.form-control {
    padding: 12px;
    font-size: 1rem;
    margin-bottom: 15px;
    border-radius: 8px;
}

.alert {
    font-size: 0.9rem;
}

@media (max-width: 576px) {
    .login-form {
        padding: 20px;
        box-shadow: none;
    }

    h1 {
        font-size: 1.6rem;
    }

    .btn-primary {
        font-size: 1rem;
        padding: 10px;
    }

    .form-control {
        padding: 10px;
        font-size: 0.95rem;
    }

    .login-branding img {
        max-width: 120px;
        margin-bottom: 15px;
    }
}