:root {
    --main-bg-color: rgb(4, 9, 38);
}

body,
h1,
h2,
h3,
h4,
h5,
p {
    margin: 0;
    padding: 0;
}

body {
    font-family: "Montserrat", sans-serif;
    font-optical-sizing: auto;
    font-style: normal;
    color: #333;
    line-height: 1.6;
}

h1 {
    font-size: 36px;
}

h2 {
    font-size: 30px;
    margin-top: 64px;
    border-bottom: solid 1px #404040;
    margin-bottom: 16px;
}

h3 {
    font-size: 24px;
    margin-top: 52px;
    margin-bottom: 16px;
    text-decoration: underline;
}

h4 {
    font-size: 20px;
    margin-top: 32px;
}

h5 {
    font-size: 18px;
    margin-top: 16px;
}

h6 {
    font-size: 18px;
}

p {
    font-size: 16px;
    margin-bottom: 8px;
}

.nav-h1 a {
    font-size: 18px;
    padding-left: 10px;
}

.nav-h2 a {
    font-size: 18px;
    padding-left: 10px;
    font-weight: bold;
}

.nav-h3 a {
    font-size: 16px;
    padding-left: 10px;
}

.nav-h4 a {
    font-size: 14px;
    padding-left: 16px;
}

.nav-h5 a {
    font-size: 12px;
    padding-left: 24px;
}

.nav-h6 a {
    font-size: 10px;
    padding-left: 28px;
}

.bold {
    font-weight: bold;
}

p > img {
    display: block;
    margin-left: auto;
    margin-right: auto;
    margin-top: 32px;
    margin-bottom: 32px;
    max-width: 800px;
}

pre {
    border: 1px solid #ccc;
    padding: 8px;
    border-radius: 8px;
    word-wrap: break-word;
    white-space: pre-wrap;
    max-width: 90%;
}

a {
    color: #007bff;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

main {
    padding: 20px;
    margin-left: 250px;
    margin-bottom: 50px;
}

header {
    background-color: var(--main-bg-color);
    color: #fff;
    padding: 20px;
    text-align: center;
    position: sticky;
    top: 0;
    display: grid;
    grid-template-columns: auto 1fr auto;
}

header div {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

header div a {
    color: white;
}

header img {
    height: 67px;
}

footer {
    background-color: var(--main-bg-color);
    color: #fff;
    padding: 10px;
    text-align: center;
    position: fixed;
    bottom: 0;
    width: 100%;
}

.side-menu {
    position: fixed;
    left: 0;
    top: 107px;
    bottom: 0;
    overflow: auto;
    width: 250px;
    background-color: var(--main-bg-color);
    color: #fff;
    z-index: 1;
}

.side-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.side-menu ul li {
    border-bottom: 1px solid #555;
}

.side-menu ul li:last-child {
    border-bottom: none;
}

.side-menu ul li a {
    color: #fff;
    text-decoration: none;
    padding-top: 10px;
    padding-bottom: 10px;
    padding-right: 20px;
    display: block;
}

.side-menu ul li:hover {
    background-color: #555;
}

table {
    border-collapse: collapse;
    margin-bottom: 32px;
}

td,
th {
    border: solid 1px #ccc;
    padding: 8px;
}

th {
    background-color: #f4f4f4;
}