X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/d8a1cbd27bcaeba879662f26f91efd0e76bb1f1f..9b533b2789df4876a789f54e992e4e9b00ece56d:/app/assets/stylesheets/common.scss

diff --git a/app/assets/stylesheets/common.scss b/app/assets/stylesheets/common.scss
index 39cdaa47a..4bedf42b6 100644
--- a/app/assets/stylesheets/common.scss
+++ b/app/assets/stylesheets/common.scss
@@ -1,53 +1,21 @@
+@use "sass:map";
 @import "parameters";
+@import "browse";
 @import "bootstrap";
+@import "rails_bootstrap_forms";
 
 /* Styles common to large and small screens */
 
-.fillL { background-color: white; }
-
 /* Default rules for the body of every page */
 
 body {
-  font-family: 'Helvetica Neue',Arial,sans-serif;
   font-size: $typeheight;
-  line-height: 1.6666;
-  color: #222;
-  background-color: #fff;
-  margin: 0px;
-  padding: 0px;
-  text-align: left;
-  height: 100%;
-}
-
-p > img {
-  width: auto;
-  max-width: 100%;
-}
-
-small, aside {
-  font-size: 12px;
-}
-
-#container { position: relative; }
-
-.column-1 {
-  width: 50%;
-  margin: 0 0 $lineheight/2 0;
 }
 
-.small_icon {
-  vertical-align: middle;
-  margin-right: $lineheight/4;
+time[title] {
+  text-decoration: underline dotted;
 }
 
-.red { color: $red; }
-
-.piwik { border: 0; }
-
-[dir=rtl] { /* no-r2 */ text-align: right; }
-
-[dir=ltr] { /* no-r2 */ text-align: left; }
-
 /* Rules for icons */
 
 .icon {
@@ -55,121 +23,126 @@ small, aside {
   vertical-align: top;
   width: 20px;
   height: 20px;
-  background: transparent image-url("sprite.png") no-repeat 0 0;
-  background-image: image-url("sprite.svg");
+  background: transparent image-url("sprite.svg") no-repeat 0 0;
   text-indent: -9999px;
   overflow: hidden;
 }
 
-.icon.search      { /* no-r2 */ background-position: 0 0; }
-.icon.donate      { /* no-r2 */ background-position: -20px 0; }
-.icon.zoomin      { /* no-r2 */ background-position: -40px 0; }
-.icon.zoomout     { /* no-r2 */ background-position: -60px 0; }
-.icon.geolocate   { /* no-r2 */ background-position: -80px 0; }
-.active .icon.geolocate   { /* no-r2 */ background-position: -80px -20px; }
-.icon.layers      { /* no-r2 */ background-position: -100px 0; }
-.icon.key         { /* no-r2 */ background-position: -120px 0; }
-.icon.share       { /* no-r2 */ background-position: -140px 0; }
-.icon.clipboard   { /* no-r2 */ background-position: -160px 0; }
-.icon.link        { /* no-r2 */ background-position: -180px 0; }
-.icon.close       { /* no-r2 */ background-position: -200px 0; }
-.close-wrap:hover .icon.close,
-.icon.close:hover { /* no-r2 */ background-position: -200px -20px; }
-.icon.check       { /* no-r2 */ background-position: -220px 0; }
-.icon.note        { /* no-r2 */ background-position: -240px 0; }
-.icon.note.grey   { /* no-r2 */ background-position: -240px -20px; }
-.icon.query       { /* no-r2 */ background-position: -260px 0; }
-
-/* Rules for links */
-
-a {
-  color: #24d;
-  text-decoration: none;
-  -webkit-appearance: none;
-  outline: 0;
-  &:hover {
-    text-decoration: underline;
-  }
-}
+.icon.search      { /*rtl:ignore*/ background-position: 0 0; }
+.icon.donate      { /*rtl:ignore*/ background-position: -20px 0; }
+.icon.zoomin      { /*rtl:ignore*/ background-position: -40px 0; }
+.icon.zoomout     { /*rtl:ignore*/ background-position: -60px 0; }
+.icon.geolocate   { /*rtl:ignore*/ background-position: -80px 0; }
+.active .icon.geolocate   { /*rtl:ignore*/ background-position: -80px -20px; }
+.icon.layers      { /*rtl:ignore*/ background-position: -100px 0; }
+.icon.key         { /*rtl:ignore*/ background-position: -120px 0; }
+.icon.share       { /*rtl:ignore*/ background-position: -140px 0; }
+.icon.clipboard   { /*rtl:ignore*/ background-position: -160px 0; }
+.icon.link        { /*rtl:ignore*/ background-position: -180px 0; }
+.icon.close       { /*rtl:ignore*/ background-position: -200px 0; }
+.icon.close:hover { /*rtl:ignore*/ background-position: -200px -20px; }
+.icon.check       { /*rtl:ignore*/ background-position: -220px 0; }
+.icon.note        { /*rtl:ignore*/ background-position: -240px 0; }
+.icon.note.grey   { /*rtl:ignore*/ background-position: -240px -20px; }
+.icon.query       { /*rtl:ignore*/ background-position: -260px 0; }
 
 /* Utility for de-emphasizing content */
 
-.deemphasize {
-  color: $darkgrey;
-  a {
-    color: $blue;
+.text-body-secondary a {
+  color: $blue;
+}
+
+/* Bootstrap contextual table classes overrides in dark mode */
+
+@include color-mode(dark) {
+  .table-primary {
+    --bs-table-bg: rgb(var(--bs-primary-rgb), .25);
   }
+  .table-secondary {
+    --bs-table-bg: rgb(var(--bs-secondary-rgb), .25);
+  }
+  .table-success {
+    --bs-table-bg: rgb(var(--bs-success-rgb), .25);
+  }
+  .table-primary, .table-secondary, .table-success {
+    --bs-table-color: initial;
+    border-color: inherit;
+  }
+}
+
+/* Utility for delayed loading spinner */
+
+.delayed-fade-in {
+  animation: 300ms linear forwards delayed-fade-in;
+}
+
+@keyframes delayed-fade-in {
+  0%   { opacity: 0 }
+  66%  { opacity: 0 }
+  100% { opacity: 1 }
+}
+
+/* Bootstrap close button overrides for nested light/dark themes */
+
+[data-bs-theme="dark"] .btn-close {
+  filter: var(--bs-btn-close-white-filter);
+}
+
+[data-bs-theme="light"] .btn-close {
+  filter: none;
 }
 
 /* Rules for the header */
 
 #menu-icon {
-  display: none !important;
-  float: right;
-  background: image-url("menu-icon.png") no-repeat;
+  display: none;
+  position: absolute;
+  top: 0;
+  right: 0;
+  background: image-url("menu-icon.svg") no-repeat;
   background-size: 30px 30px;
-  display: block;
   width: 30px;
   height: 30px;
   margin: 14px 10px 0 0;
   opacity: 0.6;
 }
 
+@include color-mode(dark) {
+  #menu-icon {
+    filter: invert(1);
+  }
+}
+
 header {
   height: $headerHeight;
   position: relative;
-  z-index: 1001;
   font-size: 14px;
 
-  h1, nav, nav > ul, nav > ul > li {
-    display: inline-block;
-  }
-
   > * {
-    height: 100%;
-    padding: $lineheight/2;
-  }
-
-  h1, nav.primary {
-    float: left;
-  }
-
-  a, a:hover {
-    text-decoration: none;
-  }
-
-  img.logo {
-    width: 30px;
-    height: 30px;
-    margin-top: -2px;
-    vertical-align: middle;
+    padding: $lineheight * 0.5;
   }
 
   h1 {
+    height: $headerHeight;
     font-size: 18px;
-    font-weight: 600;
-    line-height: 1.2;
-    margin: 0;
-    padding-top: 15px;
-
-    a {
-      color: #000;
-    }
-
-    a:hover {
-      color: #000;
-    }
   }
 
   .btn {
     font-size: 14px;
   }
-}
 
+  nav.primary {
+    margin-right: auto;
+  }
+
+  .username {
+    max-width: 12em;
+  }
+}
 
 nav.primary {
-  .btn-outline-primary {
-    @include button-outline-variant($green, $white);
+  #edit_tab .btn-outline-primary {
+    @include button-outline-variant($green, $color-hover: $white, $active-color: $white);
   }
 
   .disabled {
@@ -200,83 +173,87 @@ nav.primary {
 }
 
 nav.secondary {
-  position: absolute;
-  right: 0;
-
   .nav-link {
-    padding: 0.2rem;
-    color: $darkgrey;
+    padding: 0.3rem;
   }
+}
 
-  > ul li.current a {
-    color: darken($darkgrey, 25%);
+nav.primary, nav.secondary {
+  .dropdown-item {
+    &:hover, &:active {
+      background-color: $green;
+      color: white;
+    }
   }
+}
 
-  .login-menu {
-    .btn-outline-secondary {
-      @include button-outline-variant($darkgrey);
-    }
+#compact-secondary-nav {
+  display: none;
+}
+
+body.compact-nav {
+  #compact-secondary-nav {
+    display: inline-block;
+  }
+  .compact-hide {
+    display: none;
   }
+}
 
-  .user-menu {
-    .btn-outline-secondary {
-      @include button-outline-variant($darkgrey, $darkgrey, white, $darkgrey);
-      border-color: $grey;
-      &:hover {
-        border-color: $grey;
-      }
-      &:focus {
-        background-color: white;
-        box-shadow: none;
-      }
+body.small-nav {
+  #menu-icon {
+    display: block;
+  }
+
+  header {
+    flex-direction: column;
+    height: auto;
+    min-height: $headerHeight;
+
+    &.closed nav {
+      display: none !important;
     }
-    &.show .btn-outline-secondary {
-      background-color: white;
-      &:focus {
-        box-shadow: none;
-      }
+
+    .search_forms {
+      display: block;
     }
   }
 
-  img.user_thumbnail_tiny {
-    border: 0;
-    border-radius: 3px;
+  #sidebar .search_forms {
+    display: none;
   }
 
-  #inboxanchor {
-    display: inline-block;
-    height: 25px;
-    margin: 3px 0 3px 3px;
-    background-color: lighten($grey, 10%);
-    line-height: 20px;
-    border-radius: 3;
-  }
+  nav.primary {
+    margin-right: 0;
+    padding: 0;
 
-  .dropdown-menu {
-    .count-number {
-      font-size: 14px;
+    #edit_tab {
+      width: 100%;
+      padding: 10px;
     }
   }
-}
 
-nav.primary, nav.secondary {
-  .dropdown-item {
-    &:hover, &:active {
-      background-color: $green;
-      color: white;
+  nav.secondary {
+    flex-direction: column;
+
+    .user-menu, .login-menu {
+      width: 100%;
     }
   }
-}
-
-#compact-secondary-nav {
-  display: none;
-}
 
-body.compact {
   #compact-secondary-nav {
-    display: inline-block;
+    display: none;
   }
+
   .compact-hide {
+    display: inline-block;
+  }
+
+  .overlay-sidebar #sidebar .welcome {
+    display: none;
+  }
+
+  .overlay-sidebar #sidebar #banner {
     display: none;
   }
 }
@@ -284,35 +261,32 @@ body.compact {
 /* Utility for styling notification numbers */
 
 .count-number {
-  padding: 2px $lineheight/4;
-  border-radius: 2px;
-  background: lighten($green, 30%);
-  margin: 0 2px;
-  font-size: 11px;
-  color: #333;
+  background: transparentize(lighten($green, 25%), .25);
+  color: $gray-800;
+  font-weight: $font-weight-normal;
 }
 
-/* Rules for the message shown in place of the map when javascript is disabled */
+/* Rules for Leaflet maps */
 
-#noscript {
-  z-index: 20000000;
-  margin-left: 400px;
-  margin-top: 50px;
+.leaflet-top.leaflet-right,
+.leaflet-top.leaflet-left {
+  height: 100%;
+  column-gap: 10px;
+  display: flex;
+  flex-direction: column;
+  flex-wrap: wrap-reverse;
 }
 
-/* Rules for Leaflet maps */
-
 .leaflet-control .control-button {
   display: block;
   height: 40px;
   width: 40px;
   background-color: #333;
   background-color: rgba(0,0,0,.6);
-  border-radius: 4px 0 0 4px;
-  margin-bottom: 10px;
   outline: none;
 
-  &:hover {
+  &:hover,
+  &:focus {
     background-color: black;
   }
 
@@ -327,26 +301,18 @@ body.compact {
     background-color: $vibrant-green;
   }
 
-  .icon {
-    margin: 10px;
+  &-first {
+    border-start-start-radius: 4px;
   }
-}
-
-.leaflet-control .zoomin,
-.control-layers .control-button {
-  margin-bottom: 0px;
-  border-radius: 4px 0 0 0;
-}
 
-.leaflet-control .zoomout,
-.control-key .control-button {
-  margin-bottom: 0;
-  border-radius: 0;
-}
+  &-last {
+    border-end-start-radius: 4px;
+    margin-bottom: 10px;
+  }
 
-.control-locate .control-button,
-.control-share .control-button {
-  border-radius: 0 0 0 4px;
+  .icon {
+    margin: 10px;
+  }
 }
 
 /* Rules for the sidebar and main map area */
@@ -370,67 +336,14 @@ body.compact {
   #sidebar {
     float: left;
     width: $sidebarWidth;
-    background: #fff;
 
     #sidebar_loader {
       display: none;
     }
-
-    > div {
-      position: relative;
-      float: left;
-      clear: both;
-      width: 100%;
-    }
-
-    h2 {
-      padding: $lineheight $lineheight $lineheight/2;
-      font-size: 1.5rem;
-    }
-
-    h3, h4 {
-      margin-top: $lineheight;
-      margin-bottom: $lineheight/2;
-      font-size: 1.25rem;
-    }
-
-    .close-wrap {
-      cursor: pointer;
-      position: absolute;
-      top: 0;
-      right: 0;
-      width: 60px;
-      height: 60px;
-
-      .icon.close {
-        pointer-events: none;
-        position: absolute;
-        right: 20px;
-        top: 20px;
-      }
-    }
-
-    .icon.close {
-      float: right;
-      cursor: pointer;
-    }
-
-    .flash {
-      padding: 15px;
-
-      picture {
-        margin-right: -25px;
-      }
-
-      div.message {
-        margin-left: 30px;
-      }
-    }
   }
 
   .overlay-sidebar #sidebar {
     position: absolute;
-    z-index: 1000;
     height: auto;
     overflow: hidden;
 
@@ -439,11 +352,7 @@ body.compact {
     }
 
     .welcome {
-      display: none;
-
-      &.visible {
-        display: block;
-      }
+      display: block;
     }
 
     #sidebar_content {
@@ -453,26 +362,6 @@ body.compact {
 
   .welcome {
     display: none;
-    padding-bottom: 5px;
-
-    p {
-      padding: $lineheight/2 $lineheight $lineheight;
-      font-size: 110%;
-      font-weight: 300;
-    }
-
-    .button {
-      width: 50%;
-      float: left;
-      margin: 0;
-      border-radius: 0;
-      font-weight: normal;
-      padding: .6em;
-
-      &.learn-more {
-        border-right: 1px solid #fff;
-      }
-    }
   }
 
   #banner {
@@ -499,6 +388,14 @@ body.compact {
     .leaflet-marker-draggable {
       cursor: move;
     }
+
+    .query-marker {
+      animation: 1500ms forwards query-marker-fade;
+
+      @keyframes query-marker-fade {
+        to { opacity: 0 }
+      }
+    }
   }
 
   #map-ui {
@@ -507,147 +404,68 @@ body.compact {
     float: right;
     width: 250px;
     height: 100%;
-    background: white;
     overflow: auto;
-
-    .section {
-      border-bottom: 1px solid $grey;
-      padding: 10px 20px;
-    }
-
-    a.close-button {
-      float: right;
-      padding:5px;
-      font-size:20px;
-      line-height:10px;
-      color:#222;
-      border:1px solid $grey;
-    }
-
-    .tooltip {
-      opacity: 1;
-      border: 1px solid $grey;
-      .tooltip-arrow {
-        border-top-color: $grey;
-      }
-    }
-  }
-}
-
-.layers-ui,
-.share-ui {
-  li:last-child {
-    margin-bottom: 0;
   }
 }
 
-.layers-ui {
-  .base-layers {
-    .leaflet-container {
+@include media-breakpoint-down(md) {
+  body.map-layout {
+    #sidebar, #map {
+      position: relative;
+      overflow-x: hidden;
       width: 100%;
-      height: 50px;
-      cursor: pointer;
+      height: 50%;
     }
 
-    li  {
-      overflow: hidden;
-      border-radius: 3px;
-      border: 2px solid #fff;
-      margin-bottom: 8px;
-      position: relative;
-      transition: border-color 0.08s ease-in;
+    #map-ui {
+      width: 100%;
+      height: 50%;
+      overflow-y: scroll;
+    }
 
-      label {
+    .overlay-sidebar.overlay-right-sidebar {
+      #sidebar {
         position: absolute;
-        top: 0;
-        left: 0;
-        padding: 2px 6px;
-        border-bottom-right-radius: 3px;
-        cursor: pointer;
-        font-weight: 600;
-        font-size: 16px;
-        text-stroke: 2px #fff;
-        background: rgba(255,255,255,.9);
-        z-index: 1000;
-        input[type="radio"] {
-          display: none;
-        }
+        width: 350px;
+        height: auto;
+        overflow: hidden;
       }
 
-      &.active { border-color: darken($green, 10%); }
-      &:hover {
-        border-color: $grey;
-        &.active { border-color: darken($green, 20%); }
+      #map {
+        height: 100%;
       }
     }
   }
-
-  .overlay-layers {
-    p {
-      font-size: 13px;
-      margin-bottom: 8px;
-    }
-    li.disabled { color: $darkgrey; }
-  }
 }
 
-.share-ui {
-  .share-tabs {
-    margin-bottom: 10px;
-
-    a {
-      color: #fff;
-      text-decoration: none;
-      background-color: $lightblue;
-      padding: 5px 10px;
-      border-right: 1px solid #fff;
-    }
-
-    a:first-child {
-      border-right: 1px solid #fff;
-      border-radius: 4px 0 0 4px;
-    }
-
-    a:last-child {
-      border-radius: 0 4px 4px 0;
-    }
-
-    a.active {
-      background-color: $blue;
-    }
-  }
-
-  .share-tab {
-    display: none;
-  }
+.layers-ui {
+  .base-layers > * {
+    height: 3.5rem;
 
-  .share-link {
-    input[type=text],
-    textarea {
-      width: 100%;
-      font-family: monospace;
-      font-size: small;
-      line-height: 1.3;
+    > .btn {
+      box-sizing: content-box;
+      top: - map.get($border-widths, 4);
+      left: - map.get($border-widths, 4);
+      --bs-btn-border-color: var(--bs-body-bg);
     }
-  }
-
-  .share-image {
-    label {
-      margin-right: 10px;
+    > .btn:hover {
+      --bs-btn-border-color: var(--bs-primary-border-subtle);
     }
   }
 
-  #embed_html {
-    resize: vertical;
+  .overlay-layers {
+    li.disabled { color: $darkgrey; }
   }
+}
 
+.share-ui {
   #mapnik_scale {
     width: 100px;
   }
 }
 
 .leaflet-top {
-  top: $lineheight/2 !important;
+  top: 10px !important;
   .leaflet-control {
     margin-right: 0px !important;
     margin-top: 0px !important;
@@ -660,71 +478,79 @@ body.compact {
   border-top: 0px !important;
 }
 
-.leaflet-popup-content-wrapper {
-  border-radius: 4px !important;
+.leaflet-popup-content-wrapper, .leaflet-popup-tip,
+.leaflet-contextmenu, .leaflet-contextmenu-item,
+.leaflet-control-attribution, .leaflet-control-scale-line {
+  @extend .bg-body, .text-body;
 }
 
-/* Rules for attribution text under the main map shown on printouts */
+.leaflet-control-attribution, .leaflet-control-scale-line {
+  @extend .bg-opacity-75;
+  text-shadow: none !important;
+}
 
-#attribution {
-  display: none;
+.leaflet-contextmenu-item.over {
+  @extend .bg-body-secondary, .border-secondary, .border-opacity-10;
+}
+
+.leaflet-popup-content-wrapper {
+  @extend .rounded-1;
 
-  table {
-    width: 100%
+  a {
+    color: var(--bs-link-color) !important;
   }
 }
 
-.attribution_license,
-.attribution_project {
-  text-align: left;
-}
+@include color-mode(dark) {
+  .leaflet-tile-container .leaflet-tile,
+  .mapkey-table-entry td:first-child > * {
+    filter: brightness(.8);
+  }
 
-.attribution_notice {
-  text-align: center;
+  .leaflet-container .leaflet-control-attribution a {
+    color: var(--bs-link-color);
+  }
+
+  .leaflet-control-scale-line {
+    border-color: rgba(var(--bs-light-rgb), .75) !important;
+  }
 }
 
+/* Rules for attribution text under the main map shown on printouts */
+
 .donate-attr { color: darken($green, 10%) !important; }
 
-/* Rules for the sidebar */
+/* Temporary label size override until we remove site-wide font customisation */
 
-.sidebar_heading {
-  position: relative;
-  padding: $lineheight/2 $lineheight;
-  // background: $offwhite;
-  // border-bottom: 1px solid $grey;
-  > .close {
-    float: right;
-    margin-top: 2px;
-    cursor: pointer;
+form {
+  label {
+    font-size: 16px;
+  }
+  .col-form-label {
+    font-size: 16px;
   }
 }
 
-#browse_status {
-  p {
-    padding: $lineheight;
-  }
+/* Stop bootstrap 5 from floating legends when they don't need to be */
+legend {
+  float: none;
+}
 
-  input {
-    display: block;
-    margin-left: auto;
-    margin-right: auto;
-  }
+/* Override the text colour for primary and secondary buttons, to match our
+   bootstrap 4 colours. Note this has accessibility issues, which is why
+   bootstrap 5 calculates black as the appropriate colour, and we should
+   reconsider our colours at some point with that in mind. */
+
+.btn-primary {
+  @include button-variant($primary, $primary, $color: $white, $hover-color: $white, $active-color: $white, $disabled-color: $white);
 }
 
-#sidebar {
-  #sidebar_loader,
-  .search_more {
-    width: 100%;
-    margin: $lineheight auto;
-  }
+.btn-secondary {
+  @include button-variant($secondary, $secondary, $color: $white, $hover-color: $white, $active-color: $white, $disabled-color: $white);
+}
 
-  .loader,
-  .load_more {
-    text-align: center;
-    margin: auto;
-    width: 40px;
-    display: block;
-  }
+.btn-outline-secondary {
+  @include button-outline-variant($secondary, $color-hover: $white, $active-color: $white);
 }
 
 /* Rules for the search and direction forms */
@@ -734,158 +560,24 @@ header .search_forms,
   display: none;
 }
 
-.search_form,
-.directions_form {
-  position: relative;
-  padding: $lineheight/2;
-  background-color: $lightgrey;
-
-  .query_wrapper {
-    position: relative;
-    overflow: hidden;
-    border-radius: 2px 0 0 2px;
-  }
-
-  input[type=text] {
-    width: 100%;
-    height: 30px;
-    transition: 300ms linear;
-  }
-
-  input[type=text].overflow {
-    border-right: none;
-    border-radius: 3px 0px 0px 3px;
-  }
-
-  input:focus {
-    outline: none;
-    box-shadow: 0px 0px 7px $vibrant-green;
-  }
-
-  input[type=submit].float {
-    float: right;
-    width: auto;
-    min-width: 0;
-    border-radius: 0 2px 2px 0;
-  }
-
-  input.error {
-    background-color: rgba($red, 0.4);
-  }
-
-  select {
-    /* this next line is to polyfill the vertical alignment of text within a select element,
-     * which is different between firefox and chrome. */
-    padding: 0.3em 0;
-  }
-
-  .query_options {
-    text-align: right;
-    font-size: 10px;
-    color: $blue;
-  }
-
+.search_form {
   .describe_location {
-    position: absolute;
-    top: 6px;
-    right: 6px;
     font-size: 10px;
-    color: $blue;
-  }
-
-  .switch_link {
-    float: right;
-    width: auto;
-    min-width: 0;
-    margin-left: 6px;
-  }
-
-  img.button {
-    display: block;
-    width: 20px;
-    height: 20px;
-  }
-
-  span.force_width {
-    width: 100%;
-    padding-right: 25px;
-    display: block;
-  }
-
-  select.routing_engines {
-    min-height: 30px;
-    margin: 0px 0px 5px 25px;
-  }
-
-  input.routing_go {
-    min-width: 100px;
-    float: right;
-  }
-
-  div.header {
-    width: 100%;
-    height: 30px;
-  }
-
-  div.line {
-    width: 100%;
-    margin: 0px 0px 5px 0px;
-  }
-
-  div.loader_copy {
-    display: none;
-
-    img {
-      vertical-align: middle;
-    }
-  }
-
-  a.reverse_directions {
-    cursor: pointer;
-    margin: 0px 0px 5px 25px;
-  }
-}
-
-/* Rules for the map key which appears in the popout sidebar */
-
-#mapkey {
- .mapkey-table-key img {
-    display: block;
-    margin-left: auto;
-    margin-right: auto;
   }
 }
 
 /* Rules for search sidebar */
 
 #sidebar .search_results_entry {
-  ul li {
-    cursor: pointer;
-    &.selected { background: $list-highlight; }
-  }
-
   .search_more .loader {
     display: none;
-    width: 100%;
   }
 }
 
-.search_results_error {
-  color: #f00;
-  padding: 10px 20px;
-}
-
 /* Rules for routing */
 
-#sidebar_content>table {
-    padding: 5px 20px 10px 15px;
-    width: 100%;
-    border-collapse: separate;
-    border-spacing: 0;
-}
-
 div.direction {
-  background-image: image-url('routing-sprite.png');
+  background-image: image-url('routing-sprite.svg');
   width: 20px;
   height: 20px;
   background-repeat: no-repeat;
@@ -894,59 +586,39 @@ div.direction {
 div.direction.i#{$i} { background-position: #{($i)*-20}px 0px; }
 }
 
-p#routing_summary {
-    padding: 0 $lineheight $lineheight/4;
+@include color-mode(dark) {
+  div.direction {
+    filter: invert(1);
+  }
 }
 
-td.instruction, td.distance {
-    padding-top: $lineheight/5;
-    padding-bottom: $lineheight/5;
-    border-bottom: 1px solid $grey;
-}
 td.distance {
-    color: $darkgrey;
-    text-align: right;
     font-size: x-small;
 }
 tr.turn {
     cursor: pointer;
 }
-tr.turn:hover {
-    background: $list-highlight;
-}
-.routing_engines, #route_from, #route_to { margin-left: 25px; }
-.routing_marker { width: 15px; position: absolute; cursor: move; }
 
-/* Rules for entity history */
+.routing_marker_column {
+  width: 15px;
 
-#sidebar_content {
-  .browse_details {
-    position: relative;
-    border-bottom: $keyline;
+  img {
+    cursor: move;
   }
 }
 
-.browse_status {
-  display: none;
-}
-
 /* Rules for the history sidebar */
 
 #sidebar .changesets {
   li {
-    cursor: pointer;
-
-    &.selected { background: $list-highlight; }
-    /* color is derived from changeset bbox fillColor in history.js */
-  }
-
-  .comments {
-    float: right;
-    color: $darkgrey;
-  }
+    &.selected {
+      @extend :hover;
+    }
 
-  .comments-0 {
-    opacity: 0.5;
+    a.stretched-link > span, a:not(.stretched-link), [title] {
+      position: relative;
+      z-index: 2; /* needs to be higher than Bootstrap's stretched link ::after z-index */
+    }
   }
 
   .changeset_more .loader {
@@ -959,11 +631,11 @@ tr.turn:hover {
 
 #sidebar_content {
   .browse-section {
-    padding: $lineheight/2 $lineheight;
+    padding-bottom: $spacer;
+    margin-bottom: $spacer;
     border-bottom: 1px solid $grey;
 
     h4:first-child {
-      margin-top: 0;
       word-wrap: break-word;
     }
   }
@@ -972,208 +644,50 @@ tr.turn:hover {
     border-bottom: none;
   }
 
-  .paginate {
-    float: right;
-    padding: 1px 6px;
-    border: 1px solid $lightgrey;
-    border-radius: 3px;
-  }
-
-  .browse-field {
-    margin-bottom: 10px;
-
-    h4 {
-      padding: 5px 0 5px 10px;
-      font-size: 12px;
-      border: 1px solid $grey;
-      border-radius: 4px 4px 0 0;
-      background-color: $offwhite;
-    }
-
-    p {
-      padding: 7px 10px;
-      font-size: 12px;
-      background-color: #FFF;
-      border: 1px solid $grey;
-      border-top: 0;
-      border-radius: 0 0 4px 4px;
-    }
-  }
-
   .browse-tag-list {
-    background-color: $offwhite;
-    border: 1px solid $grey;
-    border-radius: 3px;
     table-layout: fixed;
-    border-collapse: separate;
-    border-spacing: 0;
-    width: 100%;
-
-    th, td {
-      border-bottom: 1px solid $grey;
-    }
+    white-space: pre-wrap;
+    word-wrap: break-word;
+    word-break: break-word;
 
     tr:last-child th, tr:last-child td {
       border-bottom: 0;
     }
-
-    .browse-tag-k,
-    .browse-tag-v {
-      width: 50%;
-      padding: 6px 10px;
-      word-wrap: break-word;
-      white-space: pre-wrap;
-    }
-
-    .browse-tag-k {
-      font-weight: 500;
-      background-color: $offwhite;
-    }
-
-    .browse-tag-v {
-      border-left: 1px solid $grey;
-      background-color: #fff;
-    }
-
-    .colour-preview-box {
-      float: right;
-      width: 14px;
-      height: 14px;
-      margin: 4px 0px;
-      border: 1px solid rgba(0, 0, 0, .1);
-      // add color via inline css on element: background-color: <tag value>;
-    }
-  }
-
-  .warning {
-    margin: 0 0 $lineheight/2 0;
-    padding: 0 $lineheight/2;
-  }
-
-  .note-comments li, .changeset-comments li {
-    margin: $lineheight/2 0;
-
-    p {
-      margin: 10px 6px 0 6px;
-      line-height: 1.5;
-    }
-  }
-
-  .comments-header {
-    float: left;
-  }
-
-  .subscribe-buttons {
-    float: left;
-    margin: 18px 10px 10px;
-    min-width: 80px;
-  }
-
-  .subscribe-buttons input {
-    font-size: 90%;
-    line-height: 15px;
-    min-height: 20px;
-  }
-
-  span.action-button:hover {
-    cursor: pointer;
-    text-decoration: underline;
-  }
-
-  .note-description {
-    overflow: hidden;
-    margin: 0 0 10px 10px;
-  }
-
-  .query-intro p {
-    padding: $lineheight $lineheight $lineheight/2;
   }
 
   .query-results {
     display: none;
-    padding-bottom: $lineheight/2;
-
-    h3 {
-      padding: 0 $lineheight;
-    }
+  }
+}
 
-    ul {
-      li {
-        &.query-result {
-          cursor: pointer;
-        }
+/* Force LTR/RTL alignment for placeholder text */
 
-        &.selected {
-          background: $list-highlight;
-        }
-      }
-    }
-  }
+.form-control::placeholder {
+  text-align: left;
 }
 
 /* Rules for export sidebar */
 
 .export_form {
-  padding: $lineheight;
-
-  .export_area_inputs,
-  .export_button {
-    text-align: center;
-  }
-
   .export_area_inputs {
-    margin-bottom: $lineheight/2;
     input[type="text"] {
-      width: 80px;
-      text-align: center;
-      margin-bottom: 5px;
+      width: 100px;
     }
   }
 
   .export_boxy {
-    background: $lightgrey;
-    border: 1px solid $grey;
-    border-radius: 3px;
-
-    #maxlat { margin-top: -1px; }
+    > * {
+        margin: -1px;
+    }
     #minlon {
-      float: left;
-      /* no-r2 */ margin-left: -1px;
+      /*rtl:ignore*/ float: left;
     }
     #maxlon {
-      float: right;
-      /* no-r2 */ margin-right: -1px;
-    }
-    #minlat { margin-bottom: 0; }
-  }
-
-  .export_bound {
-    margin: $lineheight/4;
-  }
-
-  .export_button {
-    margin-top: $lineheight;
-    margin-bottom: $lineheight;
-  }
-
-  dl {
-    padding-left: $lineheight/2;
-    dd {
-      margin-left: 0;
-      margin-bottom: 10px;
+      /*rtl:ignore*/ float: right;
     }
   }
 }
 
-/* Rules for the routing sidebar */
-
-#sidebar_content {
-  #routing_credit {
-    text-align: center;
-    padding: 0.5em;
-  }
-}
-
 /* Rules for edit pages */
 
 .site-edit {
@@ -1183,682 +697,161 @@ tr.turn:hover {
     bottom: 0;
     width: 100%;
   }
-
-  #map {
-    height: 100%;
-    overflow: hidden;
-  }
 }
 
 /* Rules for non-map content pages */
 
-.content-heading {
-  background: $lightgrey;
-}
-
-.content-body {
-  h1, h2, h3, p, ul, ol {
-    margin-bottom: $lineheight;
-  }
-
-  h1, h2, h3 {
-    margin-top: $lineheight/2;
-  }
-}
-
 .content-inner {
   position: relative;
-  max-width: 900px;
+  max-width: 960px;
   margin: auto;
   padding: $lineheight;
 }
 
-/* Overrides for pages that use new layout conventions */
+/* Rules for login and signup pages */
 
-.users-new,
-.users-create,
-.users-terms,
-.users-confirm {
-  .content-heading .content-inner {
-    height: 200px;
+.sessions-new, .users-new, .users-create {
+  #content .content-inner {
+    max-width: 760px;
   }
 }
 
 .header-illustration {
-  background-position: 0 0;
+  background-position: right;
   background-repeat: no-repeat;
-  position: absolute;
-  height: 200px;
+  position: relative;
+  min-height: 200px;
   width: 100%;
   left: 0;
   bottom: 0;
 
   &.new-user-main {
-    background-image: image-url("sign-up-illustration.png");
+    background-image: image-url("sign-up-illustration.svg");
+    background-position-x: 70px;
   }
 
   &.confirm-main {
-    background-image: image-url("confirm-illustration.png");
+    background-image: image-url("confirm-illustration.svg");
   }
 
   &.new-user-terms {
-    background-image: image-url("terms-illustration.png");
-  }
-
-  &.new-user-arm {
-    height: 110px;
-    width: 130px;
-    left: 260px;
-    top: 160px;
-    background-image: image-url("sign-up-illustration-arm.png");
-    z-index: 100;
+    background-image: image-url("terms-illustration.svg");
   }
 }
 
 [dir=rtl] .header-illustration {
   transform: scaleX(-1);
-}
-
-#content.maximised {
-  top: 0;
-  left: 0;
-  right: 0;
-  bottom: 0;
-  border: 0;
-  z-index: 2000;
-}
-
-/* Rules for small maps in content areas */
-
-.content_map {
-  position: relative;
-  width: 45%;
-  height: 400px;
-  border: 1px solid $grey;
-  margin-bottom: $lineheight;
-  float: right;
-}
 
-/* Rules for the new trace form */
-
-#new_trace {
-  input[type=text] {
-    width: 50%;
-    width: calc(100% - 150px);
-    max-width: 500px;
-  }
-}
-
-/* Rules for the edit trace form */
-
-.edit_trace {
-  .standard-form-row p {
-    margin-bottom: 0px;
-  }
-
-  input[type=text] {
-    width: 50%;
-    width: calc(100% - 150px);
-    max-width: 500px;
-  }
-}
-
-/* Rules for the user profile page */
-
-#userinformation {
-
-  min-height: 100px;
-  .userinformation-inner {
-    float: left;
-  }
-  h2 {
-    margin-top: 0;
-  }
-  .user-description {
-    width: 100%;
-    clear: both;
-  }
-  .deemphasize {
-    margin: 0;
+  h1 {
+    transform: scaleX(-1);
   }
-}
 
-.admin-user-info small {
-  margin-bottom: $lineheight/2;
-  display: inline;
-  margin-right: $lineheight;
-}
-
-.activity-block {
-  clear: left;
-  border-bottom: 1px solid $grey;
-  padding-bottom: $lineheight;
-  float: left;
-  h3 {
-    margin-bottom: $lineheight/2;
+  ul {
+    transform: scaleX(-1);
   }
 }
 
-.contact-activity {
-  margin-top: $lineheight;
-  width: 100%;
-}
+/* Rules for small maps in content areas */
 
-.activity-details p {
-  margin-left: 70px;
-  margin-bottom: 0;
+.content_map {
+  height: 200px;
+  margin-bottom: $lineheight;
 }
 
-.users-show {
-  // Silly exception; remove when user page is redesigned.
-  .content-inner {
-    max-width: none;
-  }
-  p#no_home_location {
-    margin: $lineheight;
-  }
-  .user_thumbnail {
-    margin-top: $lineheight/4;
-    float: left;
+@include media-breakpoint-up(md) {
+  .content_map {
+    height: 400px;
   }
 }
 
 /* Rules for the user map */
 
 .content_map .leaflet-popup-content {
-  margin: $lineheight/2;
+  margin: $spacer;
   min-height: 50px;
 }
 
 /* Rules for user popups on maps */
 
 .user_popup {
-  min-width: 200px;
   p {
     padding: 0 0 5px 0;
-    margin-top: 0 0 0 60px;
+    margin: 0 0 0 60px;
     font-size: 12px;
   }
-  img.user_thumbnail {
-    float: left;
-    margin: 0 $lineheight/2 0 0;
-  }
 }
 
-/* Rules for the user list */
-
-#user_list {
-  width: 100%;
+/* Rules for the diary entry page */
 
-  tr {
-    vertical-align: middle;
+.diary_entries {
+  #map {
+    height: 400px;
+    display: none;
   }
-
-  p {
-    margin-top: 0px;
-    margin-bottom: 0px;
+  .diary-comment .col-auto {
+    width: 62px;
+  }
+  .diary-comment .col {
+    max-width: 690px;
   }
 }
 
-#user_list_actions {
-  float: right;
-  margin-top: $lineheight/2;
-}
+/* Rules for the account confirmation page */
 
-/* Rules for the diary list page */
+.users-terms {
+  .legale {
+    padding: $lineheight;
+    margin-bottom: $lineheight;
+    overflow: auto;
+    height: 20em;
 
-.diary_post {
-  position: relative;
-  padding-top: $lineheight;
-  padding-bottom: $lineheight/2;
-  border-top: 1px solid $grey;
+    li {
+      list-style: inherit;
+    }
 
-  &:first-of-type {
-    margin-top: $lineheight/2;
+    ol ol {
+      list-style-type: lower-alpha;
+    }
   }
+}
 
-  &.deemphasize {
-    background-color: #fee;
-  }
-
-  .post_heading {
-    margin-bottom: $lineheight;
-
-    h2 {
-      margin-top: 0;
-      margin-bottom: $lineheight/2;
-    }
-  }
-
-  img.user_thumbnail {
-    float: left;
-  }
-
-  small.deemphasize {
-    float: left;
-    display: block;
-  }
-}
-
-.pagination {
-  padding-top: $lineheight;
-}
-
-/* Rules for the diary entry page */
-
-.diary_entries {
-  #map {
-    position: relative;
-    width: 90%;
-    height: 400px;
-    border: 1px solid $grey;
-    display: none;
-    margin-bottom: $lineheight;
-  }
-  #newcomment {
-    border-top: 1px solid $grey;
-    padding-top: $lineheight;
-    margin-top: $lineheight/2;
-  }
-  .comments {
-    max-width: 740px;
-  }
-  .diary-comment {
-    border-top: 1px dashed $grey;
-    padding-top: $lineheight/2;
-    padding-bottom: $lineheight/2;
-    &:first-child {
-      margin-top: $lineheight/2;
-      padding-top: $lineheight;
-      border-top: 1px solid $grey;
-    }
-    &.deemphasize {
-      background-color: #fee;
-    }
-    p {
-      margin-bottom: $lineheight/2;
-    }
-    .comment-heading {
-      margin-bottom: 0;
-      margin-top: 0;
-    }
-  }
-}
-
-.diary_entries-show img.user_thumbnail {
-  float: left;
-}
-
-
-.diary-subscribe-buttons {
-  position:relative;
-  top: -30px;
-  left: 130px;
-}
-
-/* Rules for the log in page */
-
-#login_auth_buttons {
-  margin-bottom: 0;
-}
-
-#login_auth_buttons li {
-  float: left;
-  padding: $lineheight/4 $lineheight/2;
-}
-
-/* Rules for the account confirmation page */
-
-.users-terms {
-  .legale {
-    border: 1px solid $grey;
-    padding: $lineheight;
-    margin-bottom: $lineheight;
-    overflow: auto;
-    height: 20em;
-
-    li {
-      list-style: inherit;
-    }
-
-    ol ol {
-      list-style-type: lower-alpha;
-    }
-  }
-
-  #decline {
-    background: $lightblue;
-    &:hover {
-      background: darken($lightblue, $hovercolor);
-    }
-  }
-}
-
-/* Rules for the account settings page */
-
-#accountForm .user_map {
-  position: relative;
-  width: 500px;
-  height: 400px;
-  border: 1px solid $grey;
-}
-
-#accountForm .user_image {
-  margin-bottom: 0;
-}
-
-#accountForm #user_image {
-  margin-left: 20px;
-}
-
-#accountForm ul.accountImage-options {
-  margin-left: 120px;
-}
-
-.nohome .location {
-  display: none;
-}
-
-#homerow .message {
-  display: none;
-}
-
-.nohome .message {
-  display: inline !important;
-}
-
-.content_map.settings_map {
-  width: 50%;
-  float: none;
-}
-
-/* Rules for the oauth settings page */
-
-.oauth_clients .buttons .oauth-edit {
-  border-radius: 2px 0 0 2px;
-}
-
-.oauth_clients .buttons .oauth-delete {
-  border-radius: 0 2px 2px 0;
-}
-
-/* Rules for the oauth authorization page */
-
-.oauth-authorize ul {
-  list-style: none;
-}
-
-/* Rules for messages pages */
-
-.messages {
-  input[type="submit"] {
-    margin: auto;
-  }
-
-  .inbox-row {
-    background: $offwhite;
-  }
-
-  .inbox-row-unread {
-    background: #CBEEA7;
-  }
-
-  .right {
-    float: right;
-  }
-}
-
-.inbox-row .inbox-mark-read {
-  display: none;
-}
-
-.info-line {
-  margin-bottom: $lineheight;
-  padding: $lineheight/4 0px 4px 0px;
-  border-bottom: 1px solid $grey;
-
-  form, form div {
-    display: inline;
-  }
-}
-
-.info-line .user_thumbnail_tiny {
-  vertical-align: middle;
-}
-
-.inbox-sent {
-  white-space: nowrap;
-}
-
-.inbox-mark-unread,
-.inbox-mark-read,
-.inbox-delete {
-  width: 1%;
-}
-
-.inbox-row-unread .inbox-mark-unread {
-  display: none;
-}
-
-/* Rules for "flash" notice boxes shown at the top of the content area */
-
-.flash {
-  padding: $lineheight;
-
-  &.error {
-    background-color: #ff7070;
-  }
-
-  &.warning {
-    background-color: #ffe0cc;
-  }
-
-  &.notice {
-    background-color: #CBEEA7;
-  }
-
-  div.message {
-    display: inline-block;
-    margin-left: $lineheight / 2;
-    vertical-align: middle;
-
-    p {
-      margin-top: $lineheight * 0.5;
-      margin-bottom: $lineheight * 0.5;
-
-      &:first-child {
-        margin-top: 0px;
-      }
-
-      &:last-child {
-        margin-bottom: 0px;
-      }
-    }
-  }
-}
-
-/* Rules for highlighting fields with rails validation errors */
-
-.formError {
-  display: inline-block;
-  padding: 5px 10px;
-  margin-top: 5px;
-  border-radius: 4px;
-  font-size: 12px;
-  color: #fff;
-  background-color: #ff7070;
-}
-
-/* Rules for rails validation error boxes */
-
-#errorExplanation {
-  width: 400px;
-  border: 2px solid #ff7070;
-  padding: 0 $lineheight/2;
-  margin-bottom: $lineheight;
-  background-color: #f0f0f0;
-
-  h2 {
-    margin: 0 -10px 10px -10px;
-    padding: $lineheight/4 $lineheight/4 $lineheight/4 15px;
-    font-weight: bold;
-    font-size: 12px;
-    background-color: #c00;
-    color: #fff;
-    text-align: left;
-  }
-
-  p {
-    color: #333;
-    margin-bottom: 0px;
-    padding: $lineheight/4;
-  }
-}
-
-/* Rules for forms */
-
-.standard-form {
-  fieldset {
-    margin-bottom: $lineheight;
-  }
-  label.standard-label {
-    display: block;
-    margin-bottom: $lineheight/4;
-    font-size: $typeheight;
-    font-weight: bold;
-    line-height: 1.5;
-  }
-  label.standard-label.secondary {
-    display: inline-block;
-    font-weight: normal;
-  }
-  .form-help {
-    font-weight: normal;
-  }
-  .form-column {
-    float: left;
-    margin-right: 20px;
-  }
-  .form-divider {
-    margin-top: $lineheight;
-    padding-top: $lineheight;
-    border-top: 1px solid $lightgrey;
-  }
-  .horizontal-list .standard-form-row {
-    float: left;
-    padding-right: 10px;
-  }
-  .standard-form-row {
-    margin-bottom: $lineheight/2;
-  }
-  .form-list {
-    margin-bottom: 0;
-  }
-  .form-list li {
-    margin-bottom: 5px;
-    list-style-type: none;
-  }
-  input[type="checkbox"],
-  input[type="radio"] {
-    float: left;
-    margin-top: 5px;
-  }
-}
-
-#remember_me_openid {
-  display: block;
-}
-
-select {
-  padding: 2px;
-}
-
-input[type="checkbox"],
-input[type="radio"] {
-    margin-right: 5px;
-}
-
-input[type="text"],
-input[type="email"],
-input[type="url"],
-input[type="password"],
-textarea {
-  color: #222;
-  background-color: #fff;
-  border: 1px solid $grey;
-  border-radius: 3px;
-  padding: 2px 5px;
-  margin: 0;
-  width: 200px;
-
-  &.field_with_errors {
-    border: 2px solid #ff7070;
-  }
-}
-
-textarea {
-  padding: 5px;
-  width: 100%;
-  min-height: 50px;
-  resize: vertical;
-}
-
-/* Rules for user images */
+/* Rules for user images */
 
 img.user_image {
   max-width: 100px;
   max-height: 100px;
-  border: 1px solid $grey;
-  margin-bottom: $lineheight;
-  float: left;
-  margin-right: $lineheight;
 }
 
 img.user_thumbnail {
   max-width: 50px;
   max-height: 50px;
-  border: 1px solid $grey;
-  margin-right: $lineheight;
 }
 
 img.user_thumbnail_tiny {
-  width: auto;
-  height: auto;
-  max-width: 25px;
-  max-height: 25px;
-  border: 1px solid $grey;
+  width: 25px;
+  height: 25px;
+  object-fit: contain;
 }
 
-/* Rules for geo microformats */
+/* General styles for action lists / subnavs */
 
-abbr.geo {
-  border-bottom: none;
-}
-
-/* General styles for action lists / subnavs / pager navs */
-
-ul.secondary-actions {
-  font-style: normal;
-  margin-bottom: 0;
-  margin-left: 0;
-  padding: 0;
-  &.pager {
-    display: inline-block;
-    margin-right: 60px;
-  }
-  > li {
-    display: block;
-    float: left;
-    list-style: none;
-    border-left: 1px solid $grey;
-    padding-left: $lineheight/2;
-    margin-right: $lineheight/2;
-    &:first-child {
-      border-left: 0;
-      padding-left: 0;
-    }
-    &:last-child {
-      margin-right: 0px;
+nav.secondary-actions {
+  margin-left: -11px;
+  overflow: hidden;
+  > ul {
+    display: flex;
+    flex-direction: row;
+    flex-wrap: wrap;
+    margin-bottom: 0;
+    margin-left: -1px;
+    padding: 0;
+    > li {
+      flex-basis: auto;
+      list-style: none;
+      border-left: 1px solid $grey;
+      padding-left: $lineheight * 0.5;
+      margin-right: $lineheight * 0.5;
+      margin-bottom: $lineheight * 0.125;
     }
   }
 }
@@ -1868,147 +861,16 @@ div.secondary-actions {
   text-align: center;
 }
 
-/* Utility for managing inner content areas */
-
-.inner22 { padding: $lineheight;}
-
-.inner12 { padding: $lineheight/2 $lineheight;}
-
-.inner11 { padding: $lineheight/2;}
-
-.inner20 { padding: $lineheight 0;}
-
-.inner02 { padding: 0 $lineheight;}
-
-/* Utility for general button styles */
-
-input[type="button"],
-input[type="submit"],
-input[type="reset"],
-a.button {
-  cursor: pointer;
-  border: 0;
-  display: inline-block;
-  padding: $lineheight/4 $lineheight/2;
-  min-height: 20px + $lineheight/2;
-  min-width: 120px;
-  margin: 0 0 $lineheight/2 0;
-  color: white;
-  background: $blue;
-  text-align: center;
-  border-radius: 2px;
-  &:hover {
-    background: darken($blue, $hovercolor);
-    text-decoration: none;
-  }
-  &.deemphasize {
-    background: $lightblue;
-    &:hover {
-      background: darken($lightblue, $hovercolor);
-    }
-  }
-  &:disabled {
-    background: $lightgrey;
-    &:hover {
-      background: $lightgrey;
-    }
-  }
-  &:last-child {
-    margin-bottom: 0;
-  }
-}
-
-input[type="button"],
-input[type="submit"],
-input[type="reset"] {
-  line-height: normal;
-}
-
-a.button {
-  line-height: 20px;
-}
-
-.buttons {
-  min-width: 200px;
-  input[type="submit"],
-  input[type="button"],
-  input[type="reset"],
-  .button,
-  .button_to {
-    box-sizing: border-box;
-    float: left;
-    border-radius: 0;
-    margin:0;
-    min-width: 75px;
-    max-width: 180px;
-    border-right:1px solid white;
-    text-overflow: ellipsis;
-    white-space: nowrap;
-    overflow: hidden;
-  }
-  input:first-child,
-  .button:first-child,
-  .button_to:first-child {
-    border-radius:2px 0 0 2px;
-  }
-  input:last-child,
-  .button:last-child,
-  .button_to:last-child {
-    border-radius:0 2px 2px 0;
-    border-right-width: 0;
-  }
-  input:only-child,
-  .button:only-child,
-  .button_to:only-child,
-  *[value="Hide"] + input:last-child,
-  *[value="Hide"] + .button:last-child,
-  *[value="Hide"] + .button_to:last-child {
-    border-radius:2px;
-    border-right-width: 0;
-  }
-    /* if a 3-button set has a hidden middle button */
-  *[value="Hide"] + input:nth-child(3),
-  *[value="Hide"] + .button:nth-child(3),
-  *[value="Hide"] + .button_to:nth-child(3) {
-    border-radius:0 2px 2px 0;
-    border-right-width: 0;
-  }
-  /* if a 3-button set starts with a hidden button */
-  *[value="Hide"] + input:nth-child(2):not(:last-child),
-  *[value="Hide"] + .button:nth-child(2):not(:last-child),
-  *[value="Hide"] + .button_to:nth-child(2):not(:last-child) {
-    border-radius:2px 0 0 2px;
-    border-right-width: 1px;
-  }
-}
-
-/* Customise the background colour of striped tables */
-
-.table-striped > tbody > tr:nth-child(2n+1) > td,
-.table-striped > tbody > tr:nth-child(2n+1) > th {
-   background-color: $offwhite;
-}
-
-/* Rules for OpenID logo */
-
-.openid_logo {
-  vertical-align: text-bottom;
-  border: 0;
-}
-
 /* Rules for rich text */
 
-.richtext,
-.prose {
+.richtext {
   code {
-    font-size: 13px;
-    background: $lightgrey;
+    background: var(--bs-secondary-bg);
     padding: 2px 3px;
   }
 
   pre {
-    font-size: 13px;
-    background: $lightgrey;
+    background: var(--bs-secondary-bg);
     padding: 2px 3px;
     white-space: pre-wrap;
 
@@ -2019,246 +881,37 @@ a.button {
 
   img {
     padding: $lineheight;
-    background-color: $offwhite;
+    background-color: var(--bs-tertiary-bg);
     display: block;
     max-width: 100%;
     margin: auto;
   }
 
   blockquote {
-    border-left: $lineheight solid $offwhite;
+    border-left: $lineheight solid var(--bs-tertiary-bg);
     padding-left: $lineheight;
     margin: 0;
-    color: $darkgrey;
-  }
-}
-
-.diary_post .richtext {
-    margin-top: $lineheight;
-  }
-
-.comments .richtext {
-  margin-left: 70px;
-  margin-top: 0;
-}
-
-/* Rules for rich text editors */
-
-input.richtext_title[type="text"] {
-  width: 50%;
-  width: calc(100% - 235px);
-
-  @media only screen and (max-width:768px) {
-    width: 100%;
-  }
-}
-
-.richtext_container {
-  margin-bottom: $lineheight;
-
-  .richtext_content {
-    width: 50%;
-    width: calc(100% - 235px);
-    display: inline-block;
-    vertical-align: top;
-
-    @media only screen and (max-width:768px) {
-      width: 100%;
-    }
-
-    .richtext_preview {
-      display: inline-block;
-      padding: $lineheight;
-      background-color: $offwhite;
-      overflow-x: auto;
-
-      &.loading {
-        background-image: image-url("loading.gif");
-        background-repeat: no-repeat;
-        background-position: center;
-      }
-
-      > :first-child {
-        margin-top: 0px;
-      }
-    }
-  }
-
-  .richtext_help {
-    display: inline-block;
-    vertical-align: top;
-    margin-left: 15px;
-    background-color: $offwhite;
-    padding: $lineheight/2;
-    width: 220px;
-
-    ul {
-      margin-bottom: 0;
-    }
-
-    h4.heading, li {
-      border-bottom: 1px solid $grey;
-      margin-bottom: $lineheight/4;
-      padding-bottom: $lineheight/4;
-    }
-
-    li h4, li span, li p {
-      display: inline-block;
-      vertical-align: top;
-      font-size: 11px;
-    }
-
-    li h4 {
-      width: 40%;
-      margin: 0;
-    }
-
-    li span, li p {
-      width: 50%;
-      margin-left: $lineheight/2;
-      margin-bottom: $lineheight/4;
-      white-space: nowrap;
-    }
-  }
-}
-
-/* Rules for the user notes list */
-
-.note_list {
-  tr.creator {
-    background-color: $offwhite;
+    color: var(--bs-secondary-color);
   }
 }
 
-/* Rules for the iD editor */
-
-.id-embed {
-  width: 100%;
-  height: 100%;
-}
-
-/* Rules for the "Welcome" page */
-.site-welcome, .site-fixthemap {
-  .center {
-    text-align: center;
-    .sprite {
-      float: none;
-      margin: auto;
-    }
-  }
-
-  .sprite {
-    background-image: image-url("welcome-sprite.png");
-    background-size: 500px 250px;
-    display: block;
-    float: left;
-  }
-
-  .icon-list {
-    padding-bottom: 20px;
-    div {
-      margin-bottom: 10px;
-      p {
-        padding-top: 10px;
-      }
-    }
-  }
-  .sprite.small {
-    width: 50px;
-    height: 50px;
-  }
-
-  .sprite.x {
-    /* no-r2 */ background-position: -50px 0;
-  }
-
-  .sprite.term {
-    margin-right: 10px;
-    vertical-align: middle;
-  }
-
-  .sprite.node {
-    /* no-r2 */ background-position: -100px 0;
-  }
-
-  .sprite.way {
-    /* no-r2 */ background-position: -150px 0;
-  }
-
-  .sprite.tag {
-    /* no-r2 */ background-position: -200px 0;
-  }
-
-  .sprite.editor {
-    /* no-r2 */ background-position: -250px 0;
-  }
-
-  .sprite.question {
-    /* no-r2 */ background-position: -300px 0;
-  }
-
-  .sprite.rules {
-    /* no-r2 */ background-position: -350px 0;
-  }
-
-  .start-mapping {
-    margin: auto;
-    cursor: pointer;
-    border: none;
-    padding: 20px 40px;
-    font-size: 30px;
-    text-decoration: none;
-  }
-
-  .icon.note {
-    background-color: #333;
-    border-radius: 4px;
-  }
-}
+/* Rules for the "About" page */
 
 .site-about #content {
-  background-color: $lightgrey;
-  background-position: 50% 50%;
-  background-repeat: no-repeat;
-  background-size: cover;
-  background-attachment: fixed;
-
-
   .content-inner {
-    position: relative;
-    color: #333;
-    min-width: 320px;
-    max-width: 640px;
-  }
-
-  .text {
-    background: white;
-    padding: 40px;
+    max-width: 760px;
   }
 
   .attr {
-    position: relative;
-    padding: 170px 40px 20px;
-    background: #333;
-    background: rgba(0, 0, 0, .8);
-    margin-bottom: 0;
     margin-top: -20px;
 
     h1 {
-      display: block;
-      color: white;
-      font-weight: 300;
-      font-size: 34px;
       span {
         color: $vibrant-green;
       }
     }
 
     .user-image {
-      position: absolute;
-      top: 0px;
-      right: 240px;
-      left: 0px;
       height: 150px;
       background-position: 0 50%;
       background-repeat: no-repeat;
@@ -2268,69 +921,74 @@ input.richtext_title[type="text"] {
     }
 
     .byosm {
-      position: absolute;
-      top: 0px;
-      right: 0px;
-      z-index: 1;
-      width: 240px;
-      height: 150px;
-      padding: 20px 20px 20px 40px;
-      font: 500 20px/24px Helvetica, Arial, sans-serif;
-      white-space: nowrap;
-      color: #fff;
       background: $vibrant-green;
     }
 
     .byosm span {
       display: inline-block;
-      width: 20px;
-      margin-left: -20px;
+      width: 1em;
+      margin-left: -1em;
     }
   }
+}
 
-  .icon {
-    width: 30px;
-    height: 30px;
-    margin-right: 10px;
-    vertical-align: middle;
-    background: 40px 40px image-url('about/sprite.png') no-repeat;
-
-    &.local {
-      /* no-r2 */
-      background-position: 0px 0px;
-    }
-    &.community {
-      /* no-r2 */
-      background-position: 0px -40px;
-    }
-    &.open {
-      /* no-r2 */
-      background-position: 0px -80px;
-    }
-    &.partners {
-      /* no-r2 */
-      background-position: 0px -120px;
-    }
-    &.infringement {
-      /* no-r2 */
-      background-position: 0px -160px;
-    }
-    &.legal {
-      /* no-r2 */
-      background-position: -45px -160px;
-    }
+/* Rules for block pages */
+
+#block_list .username {
+  max-width: 20em;
+}
+
+/* Rules for tabs inside secondary background sections */
+
+.bg-body-secondary .nav-tabs {
+  --bs-border-color: var(--bs-secondary-border-subtle);
+  --bs-secondary-bg: var(--bs-secondary-border-subtle);
+  margin-bottom: -1px;
+}
+
+/* Rules for traces */
+
+img.trace_image {
+  mix-blend-mode: darken;
+}
+
+@include color-mode(dark) {
+  img.trace_image {
+    filter: invert(1);
+    mix-blend-mode: lighten;
   }
 }
 
-@import 'browse';
+/* Rules for map sidebar icons */
 
-@media only screen and (max-width:960px) {
-  .header-illustration.new-user-arm {
-    display: none;
+.browse-section {
+  .node::before,
+  .way::before,
+  .relation::before {
+    display: inline-block;
+    width: 25px;
+    margin-left: -25px;
   }
+
+  .node, .way, .relation {
+    margin-left: 25px;
+  }
+
+  .node::before     { content: image-url('browse/node.svg'); }
+  .way::before      { content: image-url('browse/way.svg'); }
+  .relation::before { content: image-url('browse/relation.svg'); }
 }
 
-.read-reports {
-  background: $lightgrey;
-  opacity: 0.7;
+@each $class, $item in $map-sidebar-icons {
+  .browse-section #{$class}::before {
+    content: image-url('browse/#{map.get($item, "filename")}');
+  }
+
+  @if map.get($item, "invert") {
+    @include color-mode(dark) {
+      .browse-section #{$class}::before {
+        filter: invert(.8) hue-rotate(180deg);
+      }
+    }
+  }
 }