Restore onboarding modal (#6303)

* Restore onboarding modal
Revert 5ba8b3a396895ecec083c5258aaf9084d584a7c4

* Change greeting elephant graphic, fix up some design issues

* Fix wrong link color in onboarding modal

1 files changed, 330 insertions, 3 deletions

diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index c0a32ed05..4a9a379a8 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -1419,6 +1419,10 @@
     color: $primary-text-color;
   }
 
+  a {
+    color: inherit;
+  }
+
   .permalink {
     text-decoration: none;
   }
@@ -2760,6 +2764,7 @@
   flex: 1 1 auto;
   align-items: center;
   justify-content: center;
+
   @supports(display: grid) { // hack to fix Chrome <57
     contain: strict;
   }
@@ -2805,11 +2810,48 @@
   }
 }
 
-.pulse-loading {
+.no-reduce-motion .pulse-loading {
   transform-origin: center center;
   animation: heartbeat 1.5s ease-in-out infinite both;
 }
 
+@keyframes shake-bottom {
+  0%,
+  100% {
+    transform: rotate(0deg);
+    transform-origin: 50% 100%;
+  }
+
+  10% {
+    transform: rotate(2deg);
+  }
+
+  20%,
+  40%,
+  60% {
+    transform: rotate(-4deg);
+  }
+
+  30%,
+  50%,
+  70% {
+    transform: rotate(4deg);
+  }
+
+  80% {
+    transform: rotate(-2deg);
+  }
+
+  90% {
+    transform: rotate(2deg);
+  }
+}
+
+.no-reduce-motion .shake-bottom {
+  transform-origin: 50% 100%;
+  animation: shake-bottom 0.8s cubic-bezier(0.455, 0.030, 0.515, 0.955) 2s 2 both;
+}
+
 .emoji-picker-dropdown__menu {
   background: $simple-background-color;
   position: absolute;
@@ -3300,6 +3342,7 @@
   z-index: 100;
 }
 
+.onboarding-modal,
 .error-modal,
 .embed-modal {
   background: $ui-secondary-color;
@@ -3310,6 +3353,25 @@
   flex-direction: column;
 }
 
+.onboarding-modal__pager {
+  height: 80vh;
+  width: 80vw;
+  max-width: 520px;
+  max-height: 470px;
+
+  .react-swipeable-view-container > div {
+    width: 100%;
+    height: 100%;
+    box-sizing: border-box;
+    display: none;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    display: flex;
+    user-select: text;
+  }
+}
+
 .error-modal__body {
   height: 80vh;
   width: 80vw;
@@ -3343,6 +3405,23 @@
   text-align: center;
 }
 
+@media screen and (max-width: 550px) {
+  .onboarding-modal {
+    width: 100%;
+    height: 100%;
+    border-radius: 0;
+  }
+
+  .onboarding-modal__pager {
+    width: 100%;
+    height: auto;
+    max-width: none;
+    max-height: none;
+    flex: 1 1 auto;
+  }
+}
+
+.onboarding-modal__paginator,
 .error-modal__footer {
   flex: 0 0 auto;
   background: darken($ui-secondary-color, 8%);
@@ -3353,20 +3432,35 @@
     min-width: 33px;
   }
 
+  .onboarding-modal__nav,
   .error-modal__nav {
     color: darken($ui-secondary-color, 34%);
-    background-color: transparent;
     border: 0;
     font-size: 14px;
     font-weight: 500;
-    padding: 0;
+    padding: 10px 25px;
     line-height: inherit;
     height: auto;
+    margin: -10px;
+    border-radius: 4px;
+    background-color: transparent;
 
     &:hover,
     &:focus,
     &:active {
       color: darken($ui-secondary-color, 38%);
+      background-color: darken($ui-secondary-color, 16%);
+    }
+
+    &.onboarding-modal__done,
+    &.onboarding-modal__next {
+      color: $ui-base-color;
+
+      &:hover,
+      &:focus,
+      &:active {
+        color: darken($ui-base-color, 4%);
+      }
     }
   }
 }
@@ -3375,6 +3469,239 @@
   justify-content: center;
 }
 
+.onboarding-modal__dots {
+  flex: 1 1 auto;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.onboarding-modal__dot {
+  width: 14px;
+  height: 14px;
+  border-radius: 14px;
+  background: darken($ui-secondary-color, 16%);
+  margin: 0 3px;
+  cursor: pointer;
+
+  &:hover {
+    background: darken($ui-secondary-color, 18%);
+  }
+
+  &.active {
+    cursor: default;
+    background: darken($ui-secondary-color, 24%);
+  }
+}
+
+.onboarding-modal__page__wrapper {
+  pointer-events: none;
+  padding: 25px;
+  padding-bottom: 0;
+
+  &.onboarding-modal__page__wrapper--active {
+    pointer-events: auto;
+  }
+}
+
+.onboarding-modal__page {
+  cursor: default;
+  line-height: 21px;
+
+  h1 {
+    font-size: 18px;
+    font-weight: 500;
+    color: $ui-base-color;
+    margin-bottom: 20px;
+  }
+
+  a {
+    color: $ui-highlight-color;
+
+    &:hover,
+    &:focus,
+    &:active {
+      color: lighten($ui-highlight-color, 4%);
+    }
+  }
+
+  .navigation-bar a {
+    color: inherit;
+  }
+
+  p {
+    font-size: 16px;
+    color: lighten($ui-base-color, 8%);
+    margin-top: 10px;
+    margin-bottom: 10px;
+
+    &:last-child {
+      margin-bottom: 0;
+    }
+
+    strong {
+      font-weight: 500;
+      background: $ui-base-color;
+      color: $ui-secondary-color;
+      border-radius: 4px;
+      font-size: 14px;
+      padding: 3px 6px;
+
+      @each $lang in $cjk-langs {
+        &:lang(#{$lang}) {
+          font-weight: 700;
+        }
+      }
+    }
+  }
+}
+
+.onboarding-modal__page__wrapper-0 {
+  background: url('../images/elephant_ui_greeting.svg') no-repeat left bottom / auto 250px;
+  height: 100%;
+  padding: 0;
+}
+
+.onboarding-modal__page-one {
+  &__lead {
+    padding: 65px;
+    padding-top: 45px;
+    padding-bottom: 0;
+    margin-bottom: 10px;
+
+    h1 {
+      font-size: 26px;
+      line-height: 36px;
+      margin-bottom: 8px;
+    }
+
+    p {
+      margin-bottom: 0;
+    }
+  }
+
+  &__extra {
+    padding-right: 65px;
+    padding-left: 185px;
+    text-align: center;
+  }
+}
+
+.display-case {
+  text-align: center;
+  font-size: 15px;
+  margin-bottom: 15px;
+
+  &__label {
+    font-weight: 500;
+    color: $ui-base-color;
+    margin-bottom: 5px;
+    text-transform: uppercase;
+    font-size: 12px;
+  }
+
+  &__case {
+    background: $ui-base-color;
+    color: $ui-secondary-color;
+    font-weight: 500;
+    padding: 10px;
+    border-radius: 4px;
+  }
+}
+
+.onboarding-modal__page-two,
+.onboarding-modal__page-three,
+.onboarding-modal__page-four,
+.onboarding-modal__page-five {
+  p {
+    text-align: left;
+  }
+
+  .figure {
+    background: darken($ui-base-color, 8%);
+    color: $ui-secondary-color;
+    margin-bottom: 20px;
+    border-radius: 4px;
+    padding: 10px;
+    text-align: center;
+    font-size: 14px;
+    box-shadow: 1px 2px 6px rgba($base-shadow-color, 0.3);
+
+    .onboarding-modal__image {
+      border-radius: 4px;
+      margin-bottom: 10px;
+    }
+
+    &.non-interactive {
+      pointer-events: none;
+      text-align: left;
+    }
+  }
+}
+
+.onboarding-modal__page-four__columns {
+  .row {
+    display: flex;
+    margin-bottom: 20px;
+
+    & > div {
+      flex: 1 1 0;
+      margin: 0 10px;
+
+      &:first-child {
+        margin-left: 0;
+      }
+
+      &:last-child {
+        margin-right: 0;
+      }
+
+      p {
+        text-align: center;
+      }
+    }
+
+    &:last-child {
+      margin-bottom: 0;
+    }
+  }
+
+  .column-header {
+    color: $primary-text-color;
+  }
+}
+
+@media screen and (max-width: 320px) and (max-height: 600px) {
+  .onboarding-modal__page p {
+    font-size: 14px;
+    line-height: 20px;
+  }
+
+  .onboarding-modal__page-two .figure,
+  .onboarding-modal__page-three .figure,
+  .onboarding-modal__page-four .figure,
+  .onboarding-modal__page-five .figure {
+    font-size: 12px;
+    margin-bottom: 10px;
+  }
+
+  .onboarding-modal__page-four__columns .row {
+    margin-bottom: 10px;
+  }
+
+  .onboarding-modal__page-four__columns .column-header {
+    padding: 5px;
+    font-size: 12px;
+  }
+}
+
+.onboard-sliders {
+  display: inline-block;
+  max-width: 30px;
+  max-height: auto;
+  margin-left: 10px;
+}
+
 .boost-modal,
 .confirmation-modal,
 .report-modal,