:root {
    --primary-color: #4CAF50; /* Primary color for buttons and links */
    --secondary-color: #0056b3; /* Secondary color for background gradients */
    --text-color: #333; /* Text color */
    --light-color: #f5f5f5; /* Light background color */
    --dark-color: #333; /* Dark color for text */
    --brand-color: #2ecc71; /* Emerald Green for branding */
    --footer-bg-color: #1e1e1e; /* Footer background color */
    --footer-text-color: #bbb; /* Footer text color */
    --background-image: url('/3GCommon/images/background.jpg'); /* Background image */
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--light-color);
    color: var(--dark-color);
    margin: 0;
    padding-top: 70px; /* Adjust based on the height of your header */
    background: var(--background-image) no-repeat center center fixed;
    background-size: cover;
}

header, .navbar-brand {
    background-color: #fff;
    color: var(--brand-color);
}

header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000; /* Ensure header stays above other content */
}

.navbar-brand {
    font-weight: bold;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    font-size: 24px; /* Increase font size of brand name */
    color: var(--brand-color); /* Emerald Green for branding */
}

.navbar-nav .nav-link {
    color: var(--dark-color);
    font-weight: 500;
}

.navbar-toggler {
    border-color: rgba(255, 255, 255, 0.1);
}

.container-main {
    padding: 20px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    max-width: 1200px;
}

.info-container {
    color: #fff; /* Text color for better readability on background */
    padding: 20px;
    background: rgba(0, 0, 0, 0.6); /* Semi-transparent background */
    border-radius: 10px;
    margin: 20px;
}

.login-container {
    padding: 20px;
    border-radius: 10px;
    margin: 20px;
    text-align: center;
}

.choice-button {
    margin: 10px;
    padding: 15px;
    font-size: 18px;
    width: 80%;
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.choice-button:hover {
    background: linear-gradient(145deg, var(--primary-color), var(--secondary-color)); /* Gradient on hover */
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
}

.site-footer {
    background-color: var(--footer-bg-color); /* Darker Gray */
    color: var(--footer-text-color);
    text-align: center;
    padding: 1rem;
    width: 100%;
}

@media (max-width: 768px) {
    .navbar-brand {
        font-size: 18px; /* Adjust brand name size */
    }
    .navbar-nav .nav-link {
        font-size: 14px; /* Adjust navigation link size */
    }

    .container-main {
        padding: 20px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }

    .info-container,
    .login-container {
        margin: 0 auto; /* Center the containers horizontally */
        padding: 20px;
        width: 90%; /* Limit the width to ensure it doesn't stretch too much */
        text-align: center; /* Center text */
    }

    .info-container {
        background: rgba(0, 0, 0, 0.7); /* Background for better readability */
    }
}