custom.css

#browser:not(.address-off) #main>.toolbar {
    position: absolute;
    width: 500px;
    left: calc(50% - 250px);
    margin: 0;
    box-shadow: rgba(0,0,0,0.4) 0 6px 24px;
    background: white;
    top: 8px;
    z-index: 2;
    transition: all 0.2s;
    opacity: 0;
    transform: translateY(-50px);
}
#browser:not(.address-off) #main>.toolbar>.toolbar,
#browser:not(.address-off) #main>.toolbar>.searchfield {
    display: none;
}
#browser:not(.address-off) #main>.toolbar::after {
    height: 0px;
}
#browser:not(.address-off) #main>.toolbar.vt-shown,
#browser:not(.address-off) #main>.toolbar.vt-shown2,
#browser:not(.address-off) #main>.toolbar.vt-shown3 {
    opacity: 1;
    transform: translateY(0px);
}

#browser.popup .toolbar-addressbar + div .webpageview {
    top: 0px;
}

#vt-toolbar-toggle {
    z-index: 2;
    position: absolute;
    opacity: 0;
    left: 0;
    top: 0;
    width: 100%;
    height: 3px;
}

#window-panel .vt-tab-strip {
    max-height: 50%;
    overflow: scroll;
}
#window-panel .vt-tab-strip>div {
    display: inline-block;
    height: 100px;
    width: calc(50% - 6px);
    margin-left: 4px;
    box-shadow: rgba(0, 0, 0, 0.1) 0 0 0 1px inset;
    border-radius: 4px;
    position: relative;
}
#window-panel .vt-tab-strip>div.active{
    box-shadow: #0d7ebf 0 0 0 2px inset;
}
#window-panel .vt-tab-strip>div:nth-of-type(1) {
    margin-top: 4px;
}

#window-panel .vt-tab-strip>div>.close {
    position: absolute;
    width: 18px;
    height: 18px;
    background-color: rgba(230, 230, 230, 0.8);
    border-radius: 100%;
    opacity: 0;
    left: 4px;
    top: 4px;
    display: inline-block;
}
#window-panel .vt-tab-strip>div:hover>.close {
    opacity: 1;
}
#window-panel .vt-tab-strip>div>.close:hover {
    background-color: rgba(200, 200, 200, 0.8);
    opacity: 1;
}

#window-panel .vt-tab-strip>div>.thumbnail {
    width: calc(100% - 4px);
    height: calc(100% - 4px);
    left: 2px;
    top: 2px;
    position: absolute;
    background-size: cover;
    border-radius: 2px;
}

#tabs-container {
    width: 1px !important;
    margin: 0 !important;
    padding: 0 !important;
    opacity: 0 !important;
}
#panels-container.left {
    margin-right: -2px !important;
}
#panels-container.right {
    margin-left: -2px !important;
}

#browser.native:not(.mac) #header {
    position: absolute;
    z-index: 1;
}

#browser.native:not(.mac).tabs-right #header {
    right: 34px;
}

#browser.native:not(.mac) #switch button:first-child {
    margin-top: 28px;
}