Use sass instead of pure css

src/sass/index.scss

@@ -0,0 +1,113 @@
+@import '_variables';
+
+@import 'tweet/_base';
+@import 'profile/_base';
+@import 'general';
+@import 'navbar';
+@import 'inputs';
+@import 'timeline';
+
+body {
+    background-color: $bg_color;
+    color: $fg_color;
+    font-family: $font_0, $font_1, $font_2, $font_3;
+    font-size: 14px;
+    line-height: 1.3;
+    margin: 0;
+}
+
+* {
+    outline: unset;
+    margin: 0;
+    text-decoration: none;
+}
+
+h1 {
+    display: inline;
+}
+
+h2, h3 {
+    font-weight: normal;
+}
+
+p {
+    margin: 14px 0;
+}
+
+a {
+    color: $accent;
+
+    &:hover {
+        text-decoration: underline;
+    }
+}
+
+fieldset {
+    border: 0;
+    padding: 0;
+    margin-top: -0.6em;
+}
+
+legend {
+    width: 100%;
+    padding: .6em 0 .3em 0;
+    border: 0;
+    font-size: 16px;
+    border-bottom: 1px solid $border_grey;
+    margin-bottom: 8px;
+}
+
+ul {
+    padding-left: 1.3em;
+}
+
+ul.about-list {
+    margin-bottom: 14px;
+}
+
+.container {
+    display: flex;
+    flex-wrap: wrap;
+}
+
+#content {
+    box-sizing: border-box;
+    padding-top: 50px;
+    margin: auto;
+    min-height: 100vh;
+}
+
+.icon-container {
+    display: inline;
+}
+
+.overlay-panel {
+    max-width: 600px;
+    width: 100%;
+    margin: 0 auto;
+    margin-top: 10px;
+    background-color: $bg_overlays;
+    padding: 10px 15px;
+    align-self: start;
+}
+
+.verified-icon {
+    color: $fg_color;
+    background-color: $verified_blue;
+    border-radius: 50%;
+    flex-shrink: 0;
+    margin: 2px 0 3px 3px;
+    padding-top: 2px;
+    height: 12px;
+    width: 14px;
+    font-size: 8px;
+    display: inline-block;
+    text-align: center;
+    vertical-align: middle;
+}
+
+@media(max-width: 600px) {
+    .preferences-container {
+        max-width: 95vw;
+    }
+}