body {
    font-family: 'Roboto', sans-serif;
    background-color: #f8f9fa;
    margin: 0;
    padding: 0;
    height: 100%;
}

.container-fluid {
    height: 100vh; /* Ensure full-screen height */
}

.form-section {
    background-color: #fff;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1); /* Enhanced shadow for prominence */
    border-radius: 15px; /* Rounded corners for a modern look */
}

h3.display-3 {
    font-size: 40px; /* Larger size to make "Sign In" more prominent */
    color: #e76f51;  /* Consistent color theme */
    font-weight: 700; /* Bold font for better emphasis */
}

.text-muted {
    font-size: 16px;
    color: #6c757d;
}

/* Input Field Styling */
.form-control {
    height: 50px;
    border-radius: 8px;
    border: 1px solid #ddd;
}

.form-control:focus {
    border-color: #e76f51; /* Highlight with red color */
    box-shadow: none;
}

/* Button Styling */
.btn-primary {
    background: linear-gradient(to right, #e76f51, #d62828);
    border: none;
    transition: background 0.3s ease-in-out;
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 18px;
    font-weight: bold;
}

.btn-primary:hover {
    background: linear-gradient(to right, #d62828, #e76f51);
}

/* Custom Checkbox Styling */
.custom-checkbox .custom-control-input:checked~.custom-control-label::before {
    background-color: #e76f51;
}

/* Alert Box Styling */
.alert {
    margin-top: 10px;
}

/* Responsive Design Enhancements */
@media (max-width: 768px) {
    .form-section {
        padding: 30px;
    }

    h3.display-3 {
        font-size: 36px; /* Slightly reduce size for tablets */
    }

    .btn-primary {
        font-size: 16px;
        padding: 10px 18px;
    }
}

@media (max-width: 576px) {
    .form-section {
        padding: 20px;
        height: auto; /* Adjust height for smaller screens */
    }

    h3.display-3 {
        font-size: 30px; /* Adjust heading size for smaller screens */
    }

    .btn-primary {
        font-size: 14px;
        padding: 10px 15px;
    }

    .text-muted {
        font-size: 14px;
    }
}