:root{
    /* =========================
       PAGE WRAPPER
    ========================= */
    --page-width: 90%;
    --page-max-width: 1200px;

    /* =========================
       LAYOUT DIMENSIONS
    ========================= */
    --header-height: 60px;
    --footer-height: 40px;
    --sidebar-width: 260px;

    /* CONTENT WIDTH (explicit) */
    --content-width: calc(100% - var(--sidebar-width));

    /* =========================
       COLORS
    ========================= */
    --bg-header: #1f2937;
    --bg-menu: #374151;
    --bg-sidebar: #2b2f36;
    --bg-content: #ffffff;

    --link-color: #ffffff;
    --link-visited: #c0c0c0;
    --link-hover: #ffd400;
}

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

html, body {
    width: 100%;
    height: 100%;
    font-family: Arial, sans-serif;
    background: #e5e7eb;
}

html {
    overflow-y: scroll;
}

/* CENTER WRAPPER */
body {
    display: flex;
    justify-content: center;
}

/* =========================
   MAIN SITE WRAPPER
========================= */
.site {
    width: var(--page-width);
    max-width: var(--page-max-width);
    min-height: 100vh;

    display: flex;
    flex-direction: column;

    background: white;
}

/* =========================
   HEADER
========================= */
header {
    height: var(--header-height);
    background: var(--bg-header);
    color: white;

    display: flex;
    align-items: center;

    padding: 0 15px;
}

/* =========================
   TOP MENU
========================= */
.top-menu ul {
    list-style: none;
    display: flex;
    background: var(--bg-menu);
}

.top-menu li {
    position: relative;
}

.top-menu a {
    display: block;
    padding: 12px 18px;
    color: white;
    text-decoration: none;
}

.top-menu a:hover {
    background: #4b5563;
}

/* DROPDOWN */
.dropdown {
    display: none !important;
    position: absolute;
    top: 100%;
    left: 0;
	white-space: nowrap;
    background: var(--bg-menu);
    z-index: 9999;
}

.top-menu li:hover > .dropdown {
    display: block !important;
}

/* =========================
   MAIN LAYOUT AREA
========================= */
.layout {
    flex: 1;
    width: 100%;

    display: flex;
    flex-direction: row;
}

/* =========================
   LEFT SIDEBAR (FIXED)
========================= */
.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    max-width: var(--sidebar-width);

    background: var(--bg-sidebar);
    padding: 10px;

    overflow-y: auto;
}

/* REMOVE BULLETS */
.sidebar ul {
    list-style: none;
}

/* LINKS */
.sidebar a {
    display: block;
    padding: 8px 6px;
    text-decoration: none;
    color: var(--link-color);
}

.sidebar a:visited {
    color: var(--link-visited);
}

.sidebar a:hover {
    color: var(--link-hover);
}

/* =========================
   CONTENT (EXPLICIT DEFINITION)
========================= */
.content {
    width: var(--content-width);
    min-width: 0;

    background: var(--bg-content);
    padding: 20px;

    overflow-x: hidden;
    overflow-y: auto;
}

/* =========================
   FOOTER
========================= */
footer {
    height: var(--footer-height);
    background: var(--bg-header);
    color: white;

    display: flex;
    align-items: center;
    justify-content: center;
}


/* =========================
   Table steel blue
========================= */
table.table-steelblue {
    margin-left: auto;
    margin-right: auto;
    border-collapse: separate;
    border-spacing: 2px;
    border: 1px solid steelblue;
}

table.table-steelblue th, 
table.table-steelblue td {
    border: 1px solid steelblue;
    padding: 5px 10px;
}

table.table-steelblue th {
    background-color: steelblue;
    color: white;
}

p {
    font-family: Arial, sans-serif;
    text-align: justify;
    text-justify: inter-word;
    display: block;
    width: 100%;
}

img {
   width: min(800px, 90%);
  height: auto;
  display: block;
  margin: 1em auto;
}

h1 {
    font-family: 'Lobster', cursive;
    font-size: 24px;
    color: steelblue;
	margin-bottom: 20px; /* space below the heading */
}

.date {
    text-align: right;
    color: gray;
    font-size: 10px;
}