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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}

/*header styles */
header {
    background-color: #a81919;
    color: white;
    text-align: center;
    padding: 1.5rem;
}

/*Nav styles*/
nav {
    background-color: #6b5b95;
}

nav ul {
    display: flex;
    list-style: none;
    justify-content: space-around;
}

nav a {
    display: block;
    color: white;
    text-decoration: none;
    padding: 1rem;
    text-align: center;
}

nav a:hover {
    background-color: #584c7c;
}


main {
    display: flex;
    flex-wrap: wrap;
    padding: 1rem;
    gap: 1rem;
}

section, aside {
    flex: 1;
    min-width: 300px;
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 1.5rem;
    margin-bottom: 1rem;
}


@media (min-width: 1200px) {
    .summary {
        flex: 1;
    }
    
    .diagram {
        flex: 1;
    }
    
    .visualization {
        flex: 1;
    }
}

/*containers*/
.diagram-container, .visual-container {
    border: 1px solid #ddd;
    padding: 1rem;
    margin-top: 1rem;
    text-align: center;
}

img {
    max-width: 100%;
    height: auto;
}

h2 {
    color: #6b5b95;
    margin-bottom: 1rem;
    border-bottom: 2px solid #f4f4f4;
    padding-bottom: 0.5rem;
}

/*footer*/
footer {
    background-color: #ba2139;
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: 1rem;
    clear: both;
}