body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
    line-height: 1.6;
}

header {
    background-color: #0d2d62;
    color: white;
    text-align: center;
    padding: 30px;
}

nav {
    background-color: #1b3f7a;
}

nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    justify-content: center;
}

nav li {
    margin: 0 15px;
}

nav a {
    display: block;
    color: white;
    text-decoration: none;
    padding: 15px;
    font-weight: bold;
}

nav a:hover {
    background-color: #335ea8;
}

main {
    max-width: 1000px;
    margin: 30px auto;
    background-color: white;
    padding: 30px;
    border-radius: 10px;
}

section {
    margin-bottom: 40px;
}

h2 {
    color: #0d2d62;
}

.code-box {
    background-color: #272822;
    color: #f8f8f2;
    padding: 15px;
    border-radius: 5px;
    white-space: pre-wrap;
}

.gantt-image {
    width: 100%;
    border: 2px solid #ccc;
}

footer {
    background-color: #0d2d62;
    color: white;
    text-align: center;
    padding: 20px;
}