/* --- Color Variables --- */
:root 
{
    --dark-blue: #0A1A2F;
    --secondary-blue: #152642;
}  

/* --- Global Reset --- */
* 
{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
       
/* --- Base Body Styles --- */
body 
{
    font-family: 'Roboto', sans-serif;
    background-color: #FAFAFA;
    color: #333;
    line-height: 1.6;
}
              
/* --- Main Layout Container --- */
.hub-conatiner 
{
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}
      
/* --- Header Section --- */
header 
{
    background-color: var(--dark-blue); 
    color: white;
    padding: 20px 0;
    text-align: center;
}

header h1 
{
    font-size: 2.5rem;
    margin-bottom: 10px;
}
        
header p 
{
    font-size: 1.1rem;
    opacity: 0.9;
}
               
/* --- Navigation Bar --- */
nav 
{
    background-color: var(--secondary-blue); 
    padding: 15px 0;
}

nav ul 
{
    display: flex;
    justify-content: center;
    list-style: none;
}
        
nav ul li 
{
    margin: 0 15px;
}
        
nav ul li a 
{
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 15px;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}
        
nav ul li a:hover, nav ul li a.active 
{
    background-color:#ffffff;
    color: black;
}
        
/* --- Application Card Container --- */
.app-container 
{
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    margin-top: 30px;
}
        
/* --- Individual Application Card --- */
.app-card 
{
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease;
}
        
.app-card:hover 
{
    transform: translateY(-5px);
}
                     
/* --- App Card Internals --- */
.app-card-header 
{
    background-color: var(--dark-blue); 
    color: white;
    padding: 15px 20px;
}

.app-card-header h2 
{
    font-size: 1.5rem;
}
        
.app-card-body 
{
    padding: 20px;
}

.app-description 
{
    margin-bottom: 20px;
    color: #666;
}        
                
/* --- App Card Link Button --- */
.app-link 
{
    display: inline-block;
    background-color: var(--secondary-blue);
    color: white;
    padding: 10px 20px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.app-link:hover 
{
    background-color: var(--dark-blue);
}

.app-link:active 
{
    transform: scale(0.97);
}

/* --- Footer Section --- */
footer 
{
    background-color: var(--dark-blue);
    color: white;
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
}
        
.hidden 
{
    display: none;
}
        
/* --- Responsive Styles --- */
@media (max-width: 768px) 
{
    nav 
    {
        display:none;
    }
            
    nav ul li 
    {
        margin: 5px 0;
    }
            
    .app-container 
    {
        grid-template-columns: 1fr;
    }
}