Button has more styles w/ added clases.

- .small: minimal height for content.
 - .pulse-button: animate a pulsating effect, used for getting user
 attention.
 - .warning: new orange warning button styling, used for update buttons.

frontend/styles/global.scss

@@ -93,10 +93,6 @@ a {
     }
   }
 
-  &.small > button {
-    height: min-content;
-  }
-
   @include mobile {
     &:not(.row) {
       flex-direction: column;
@@ -114,6 +110,8 @@ input,
 textarea {
   border-radius: 0;
   box-shadow: none;
+  padding: 0;
+  margin: 0;
   -webkit-appearance: none;
   font-size: 1.1rem;
   border: 1px solid rgba(#333333, 0.3);
@@ -127,7 +125,6 @@ textarea {
   color: #333;
   padding: 10px 30px;
   margin: 0;
-  border: 0;
   width: fit-content;
   font-size: 1.3rem;
   line-height: 1.3rem;
@@ -145,6 +142,11 @@ textarea {
     height: auto;
   }
 
+  &.warning {
+    background-color: #f9826c;
+    color: white;
+  }
+
   &.danger {
     background-color: $red;
     color: white;
@@ -160,9 +162,12 @@ textarea {
     top: 0;
     left: 0;
     opacity: 0;
-    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.07),
-      0 4px 8px rgba(0, 0, 0, 0.07), 0 8px 16px rgba(0, 0, 0, 0.07),
-      0 16px 32px rgba(0, 0, 0, 0.07), 0 32px 64px rgba(0, 0, 0, 0.07);
+    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.07), 0 4px 8px rgba(0, 0, 0, 0.07),
+      0 8px 16px rgba(0, 0, 0, 0.07), 0 16px 32px rgba(0, 0, 0, 0.07), 0 32px 64px rgba(0, 0, 0, 0.07);
+  }
+
+  &.active {
+    font-weight: bold;
   }
 
   &:hover:not(:disabled) {
@@ -172,7 +177,7 @@ textarea {
       opacity: 1;
     }
   }
-  &:disabled{
+  &:disabled {
     opacity: 0.25;
     cursor: not-allowed;
   }
@@ -182,6 +187,21 @@ textarea {
   }
 }
 
+.pulse-button:not(:hover) {
+  animation: pulse 1.5s infinite cubic-bezier(0.66, 0, 0, 1);
+}
+
+@keyframes pulse {
+  from {
+    transform: scale(1);
+  }
+  50% {
+    transform: scale(1.12);
+  }
+  to {
+    transform: scale(1);
+  }
+}
 
 .cursor {
   &-pointer {
@@ -202,7 +222,8 @@ textarea {
   text-decoration: none;
   color: $matte-text-color;
 
-  &:focus, &:hover {
+  &:focus,
+  &:hover {
     border-color: $link-color;
   }
 }