body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4; 
    color: #333; 
    line-height: 1.6; 
}

header {
    background-color: #2c3e50; 
    color: white;
    text-align: center;
    padding: 2rem 0; 
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
}

header h2 {
    margin-top: 10px;
    font-weight: normal;
    font-style: italic;
    font-size: 1.2rem;
    color: #ecf0f1; 
}

nav {
    display: flex;              
    justify-content: center;    
    align-items: center;        
    gap: 20px;                
    background-color: #34495e;
    padding: 15px;
}

nav a {
    color: white;
    text-decoration: none; 
    margin: 0 15px; 
    font-size: 1.1rem;
}

nav a:hover {
    color: #3498db; 
    text-decoration: underline;
}
img {
    max-width: 100%; 
    height: auto;    
    display: block;
    border-radius: 8px;
}
main {
    display: grid;
    flex-grow: 1;
    flex-shrink: 1;               
    gap: 30px;                      
    max-width: 900px;
    margin: 30px auto;
    background-color: white;
    padding: 30px;
    border-radius: 8px;
}

section {
    margin-bottom: 10px; 
    border-bottom: 1px solid #1c517c; 
    padding-bottom: 20px;
}

table {
    width: 100%; 
    border-collapse: collapse; 
    margin-top: 15px;
}

th, td {
    border: 1px solid #1c517c;
    padding: 12px;
    text-align: left;
}

th {
    background-color: #dbd7d7;
    font-weight: bold;
    color: #2c3e50;
}

footer {
    text-align: center;
    padding: 20px;
    background-color: #2c3e50;
    color: white;
    font-size: 0.9rem;
}
@media (max-width: 768px) {
    
    main {
        grid-template-columns: 1fr; 
    }

    nav {
        flex-direction: column;
    }

    header h1 {
        font-size: 1.8rem;
    }
}
@media (min-width: 1024px) {
    main {
        grid-template-columns: 1fr; 
    }

    nav {
        flex-direction: row;
    }

    header h1 {
        font-size: 2.5rem;
    }
}