EmulatorJS/src/css/main.css

.ejs_parent {
    background: #000;
    overflow: hidden;
    --ejs-primary-color: 26,175,255;
    position: relative;
    font-family: Avenir,"Avenir Next","Helvetica Neue","Segoe UI",Helvetica,Arial,sans-serif;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    font-weight: 500;
    line-height: 1.7;
    width: 100%;
    height: 100%;
}

.ejs_game {/* todo. User selectable background loading image */
    width: 100%;
    height: 100%;
    background-color: rgb(51, 51, 51);
    cursor: default;
}

.ejs_start_button {
    position: absolute;
    bottom: 65px;
    left: 50%;
    transform: translateX(-50%);
    cursor: pointer;
    box-sizing: inherit;
    
    display: flex;
    justify-content: center;
    text-shadow: 0 1px 1px rgba(0,0,0,0.5);
    font-size: 20px;
    line-height: 45px;
    text-transform: uppercase;
    font-weight: bolder;
    position: relative;
    text-decoration: none;
    width: 200px;
    height: 45px;
    border: 0;
    color: #fff !important;
    border-radius: 35px;
    text-align: center;
    background-color: rgba(var(--ejs-primary-color),1);
}

.ejs_start_button:active {
    box-shadow: 0 0 0 0 #222, 0 3px 7px 0 #111, inset 0 1px 1px 0 rgba(250,250,250,0.2), inset 0 -10px 35px 5px rgba(0,0,0,0.5);
    bottom: 64px;
}

.ejs_loading_text {
    position: absolute;
    bottom: 20px;
    font-weight: 500;
    left: 50%;
    transform: translateX(-50%);
    box-sizing: inherit;
    font-size: 12px;
    color: #bcbcbc;
}

.ejs_canvas {
    width: 100%;
    height: 100%;
}

.ejs_context_menu {
    position: absolute;
    display: none;
    z-index: 9;
    background: rgba(16,16,16,0.9);
    border-radius: 3px;
    font-size: 13px;
    min-width: 140px;
    padding: 8px;
    box-sizing: inherit;
}

.ejs_context_menu li {
    padding: 4px 11px;
    text-align: center;
}

.ejs_context_menu li a {
    color: #999;
    display: block;
    font-size: 13px;
}
.ejs_context_menu ul {
    color: #999;
    display: block;
    font-size: 13px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.ejs_context_menu li:hover {
    background: rgba(var(--ejs-primary-color),1);
    border-radius: 4px;
    box-shadow: 0 0 0 5px rgba(var(--ejs-primary-color),0.5);
    outline: 0;
}