main.css

:root {
    --white: #ffffff;
    --light-gray: #EDF0F7;
    --gray: #D4D7DC;
    --dark-gray: #575E75;

    --title-bar-height: 36px;
    --corners-radius: 5px;
    --splitter-width: 4px;

    --layout-container-padding-top: 8px;
    --layout-container-padding-bottom: 5px;
    --layout-container-padding-left: 5px;
    --layout-container-padding-right: 5px;
    --layout-container-from-top: calc(var(--title-bar-height) + var(--layout-container-padding-top));


    --frame-background-color: var(--gray);
    --title-bar-background-color: var(--dark-gray);
    --tabs-bar-background-color: var(--light-gray);
    --tab-background-color: var(--gray);
    --tab-background-color-active: var(--white);
    --tab-text-color: var(--dark-gray);
    --splitter-color: var(--gray);
    --color-behind-views: var(--white); /* only seen if there's a problem with the view */

    --close-button-url: url("data:image/svg+xml;base64,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");
    --minimize-button-url: url("data:image/svg+xml;base64,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");
    --expand-button-url: url("data:image/svg+xml;base64,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");
    --tab-close-url: url("data:image/svg+xml;base64,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");
}

body {
    min-height: 100%;
    width: 100%;
    margin: 0;
    padding: 0px;
    overflow: hidden;
}

html {
    height: 100%;
    width: 100%;
    padding: 0px;
    margin: 0;
    overflow: hidden;
}

#of-frame-main {
    height: 100%;
    width: 100%;
    padding: 0px;
    margin: 0;
    position: absolute;
    overflow: hidden;
    background-color: var(--frame-background-color);
}

#title-bar {
    background: var(--title-bar-background-color);
    width: 100%;
    height: var(--title-bar-height);
    display: flex;
}

.title-bar-draggable {
    position: relative;
    flex-grow: 1;
    margin: 7px 0 0 7px; /* leave grabbable margin for resize */
    -webkit-app-region: drag;
    -webkit-user-select: none;
}

div.wrapper_title {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3vw;
    opacity: 0.3;
    color: var(--tab-background-color); /* this is the text you see when a view isn't showing */
}

#buttons-wrapper {
    -webkit-app-region: none;
    cursor: pointer;
    user-select: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.button {
    -webkit-app-region: no-drag;
    margin-right: 16px;
    vertical-align: middle;
    height: 12px;
    width: 12px;
}

.button:hover {
    transform: scale(1.2);
}

#layout-container {
    height: calc(100% - var(--title-bar-height) - var(--layout-container-padding-top) - var(--layout-container-padding-bottom));
    width: calc(100% - var(--layout-container-padding-left) - var(--layout-container-padding-right));
    padding: var(--layout-container-padding-top) var(--layout-container-padding-right) var(--layout-container-padding-bottom) var(--layout-container-padding-left);
}

.tab-button {
    position: relative;
    height: 10px;
    width: 10px;
    right: 0px;
    font-weight: bold;
    z-index: 9999;
    padding: 0px 10px 0px 0;
    margin: 0px auto;
    display: inline-block;
    vertical-align: middle;
}

.tab-button:hover {
    transform: scale(1.2);
}

#close-button {
    background-image: var(--close-button-url);
    background-repeat: no-repeat;
}

#expand-button {
    background-image: var(--expand-button-url);
    background-repeat: no-repeat;
}

#minimize-button {
    background-image: var(--minimize-button-url);
    background-repeat: no-repeat;
}

#close-tab-icon {
    background-image: var(--tab-close-url);
    background-repeat: no-repeat;
}

.lm_goldenlayout {
    background-color: var(--frame-background-color);
}

.lm_header {
    -webkit-app-region: no-drag;
    box-shadow: none;
}

.lm_tabs {
    -webkit-app-region: no-drag;
    background-color: var(--tabs-bar-background-color);
    border-top-left-radius: var(--corners-radius);
    border-top-right-radius: var(--corners-radius);
    width: 100%;
}

.lm_header .lm_tab {
    box-shadow: none !important;
    border-top-right-radius: var(--corners-radius);
    border-top-left-radius: var(--corners-radius);
    background-color: var(--tab-background-color);
    color: var(--tab-text-color);
    padding-right: 0px;
}

.lm_header .lm_tab .lm_title {
    margin-right: 10px;
    vertical-align: middle;
    padding: 0;
}

.lm_title {
    width: 110px;
    white-space: nowrap;
}

.lm_header .lm_tab.lm_active {
    background-color: var(--tab-background-color-active);
}

.lm_content {
    background-color: var(--color-behind-views);
    border-bottom-left-radius: 5px;
    border-bottom-right-radius: 5px;
}

.lm_splitter {
    background-color: var(--splitter-color);
    opacity: 1;
}

.lm_splitter:hover,.lm_splitter.lm_dragging {
    background-color: var(--splitter-color);
    opacity: 1;
}

.lm_splitter.lm_dragging {
    background-color: var(--splitter-color);
    opacity: 1;
}

.lm_dropTargetIndicator .lm_inner {
    background: rgb(237, 240, 247);
    opacity: .2
}

.tab-text {
    font: ariel;
    size: 12px;
    font-weight: regular;
    line-height: 14;
    letter-spacing: -0.06;
}

.lm_header .lm_controls li.lm_tabdropdown:before{
    color:var(--tab-text-color)
}

.lm_header .lm_controls .lm_close {
    display: none !important
}