bitburner-src/css/styles.css

/** This removes all padding and margins as well as 
    setting a default font size and family for the page **/
* { 
    margin: 0;
    padding: 0;
    font-size: 16px;
    font-family: 'Lucida Console', 'Lucida Sans Unicode', 'Fira Mono', 'Consolas', 'Times New Roman';
    background-color: #252527;
    background-color: black;
}

p {
    color: #66ff33;
}

h1 {
    color: #66ff33;
}

h2 {
    color: #66ff33;
}

ul {
    padding: 6px;
    list-style-type: none;
}

li {
    list-style-type: none;
}

span {
    margin: 4px;
    padding: 4px;
}

/* Disable border highlight on elements */
input:focus,
textarea:focus,
button:focus,
td:focus,
tr:focus {
    outline:none;
}

/* Main menu */
.mainmenu {
    list-style-type: none;
    margin: 0;
    padding: 0;
    width: 10%;
    position: fixed;
    height: 100%;
    overflow: auto;
    
    border: 0;
	border-bottom: 1px solid #000000;
	border-radius: 0;
	background-color: #333;
}

.mainmenu>li a {
    display: block;
    color: #e6e6e6;
    background-color: #333;
    padding: 16px;
    text-decoration: none;
}

.mainmenu>li a:hover:not(.active) {
    background-color: #555;
    color: white;
}

.mainmenu>li a:focus {
    background-color: #555;
}

.mainmenu>li a.active {
    background-color: #555;
    color: white;
	
}

/* Make html links ("a" elements) nice looking buttons with this class */
.a-link-button {
    text-decoration: none;
    background-color: #555;
    color: #FFFFFF;
    padding: 6px;
    margin: 6px;
    border-top: 1px solid #333333;
    border-right: 1px solid #333333;
    border-bottom: 1px solid #333333;
    border-left: 1px solid #333333;
}

.a-link-button:hover {
    background-color: #666;
}

/* Make anchor tags ("a" elements) inactive (not clickable) */
.a-link-button-inactive {
    text-decoration: none;
    background-color: #333;
    color: #FFFFFF;
    padding: 6px;
    margin: 6px;
    border-top: 1px solid #333333;
    border-right: 1px solid #333333;
    border-bottom: 1px solid #333333;
    border-left: 1px solid #333333;
    pointer-events: none;
    cursor: default;
}