My personal changes to Discord's theme, to be used with Stylus browser extension

discord-theme-improvements.css

* {
    -webkit-font-smoothing: subpixel-antialiased !important;
    text-rendering: optimizelegibility !important;
    -moz-osx-font-smoothing: grayscale !important;
    /*font-smooth: grayscale !important;*/
    font-smooth: always !important;
}

:root {
    --text-link: hsl(212,calc(var(--saturation-factor, 1)*100%),43.9%);
}

body {
    font-weight: 300 !important;
}

body,
html,
input,
div,
span,
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: rubik,"source sans pro", "overpass", "firago", "source sans pro", rubik, sans-serif !important;
}

html, .name-uJV0GL, .name-23GUGE {
    font-size: 14px !important;
}

.roleColor-rz2vM0, .desaturateUserColors-1gar-1 {
    color: rgb(132, 132, 132) !important;
}

.theme-light .markup-2BOw-j {
    font-weight: 400 !important;
}

.members-1998pB, .members-1998pB > div, .container-2wlB3z {
    background-color: #fff !important;
}

.clickable-1JJAn8 .layout-2DM8Md {
    transition: 0.75s !important;
}

.clickable-1JJAn8:hover .layout-2DM8Md {
    /*background-color: #146de930 !important;*/
    background-color: var(--text-link) !important;
    transition: 0.75s !important;
    box-shadow: 0px 0px 10px rgba(0,0,0,0.3) !important;
}

.selected-aXhQR6 .layout-2DM8Md {
    background-color: #146de940 !important;
    box-shadow: inset 0px 0px 5px rgba(0,0,0,0.2) !important;
    transition: 0.5s !important;
}

.clickable-1JJAn8:hover .layout-2DM8Md .roleColor-rz2vM0 {
    color: #fff !important;
    transition: 0.5s !important;
}

.clickable-1JJAn8:hover .layout-2DM8Md .activityText-yGKsKm {
    color: #ddd !important;
    transition: 0.5s !important;
}

.auto-Ge5KZx, .auto-Ge5KZx.fade-2kXiP2:hover, .auto-Ge5KZx.scrolling-1Cdwk- {
    scrollbar-color: rgb(132, 132, 132) #fff !important;
}

.scroller-1Bvpku {
    /*background-color: rgb(8, 8, 8) !important;
    opacity: 0.5 !important;*/
    transition: 1s !important;
}

.scroller-1Bvpku:hover {
    /*opacity: 1 !important;*/
    transition: 1s !important;
}

.item-2hkk8m {
    background-color: var(--text-link) !important;
}

.base-gE7OpD .text-1y-e8- {
    font-size: 14px !important;
    font-weight: 400 !important;
}

.embedWrapper-lXpS3L {
    border-color: var(--text-link) !important;
}

.modeSelected-3DmyhH .channelName-3KPsGw {
    font-weight: 600 !important;
}

.name-28HaxV {
    font-weight: 400 !important;
}

.name-3Vmqxm, .activity-2EQDZv {
    font-weight: 400 !important;
}

ul.content-2a4AW9 .name-28HaxV {
    font-size: 100% !important;
}

.members-3WRCEx .name-3Vmqxm {
    font-size: 14px !important;
}