Moved css classses to layout file

There seems to be some issue with integrating a new css file.
Therefore, all the classes for the publications page were
moved to an existing file.

_sass/_layout.scss

@@ -98,3 +98,102 @@ ul.network-icon {
   max-height: 100em;
   transition: all .15s ease;
 }
+
+.publications .item {
+  display: none;
+  transition: opacity 2.5s ease-in-out; 
+}
+
+.publications .container {
+  grid-template-columns: repeat(5, minmax(0, 1fr));
+  gap: 1rem;
+  line-height: 1.2rem;
+  padding-top: 10px;
+  display: grid;
+}
+
+
+.publications .date {
+  grid-column: span 1;
+  font-size: 1.0rem;
+  line-height: 1.2rem;
+  text-transform: capitalize;
+  color: var(--global-text-color);
+}
+
+.publications .content {
+  grid-column: span 4;
+  text-align: left;
+}
+
+.publications .details {
+  display: flex;
+}
+
+.publications .title-link {
+  display: inline-block;
+  font-weight: 400;
+  font-size: 1.1rem;
+  margin-bottom: 0.3rem;
+  line-height: 1.5rem;
+  text-decoration: none;
+  transition: color 0.3s ease;
+}
+
+.publications .title {
+  display: inline-block;
+  font-weight: 400;
+  font-size: 1.1rem;
+  margin-bottom: 0.3rem;
+  line-height: 1.5rem;
+  text-decoration: none;
+  transition: color 0.3s ease;
+}
+
+
+.publications .author {
+  font-size: 0.95rem;
+  font-style: italic;
+  color: var(--global-text-color-light);
+  margin-bottom: 0.3rem;
+}
+
+.publications .journal {
+  font-size: 0.95rem;
+  line-height: 1.2rem;
+  color: var(--global-text-color-light);
+}
+
+.publications .chevron {
+  width: 15px;
+  height: 15px;
+  transition: transform 0.3s ease, fill 0.3s ease;
+  margin-left: 8px;
+  color: var(--global-text-color);
+}
+
+.publications .chevron:hover {
+  fill: var(--global-hover-color);
+  transform: scale(1.1);
+}
+
+.publications .separator {
+  padding-top: 0px;
+  margin-top: 0px;
+  margin-bottom: 0px;
+  padding-bottom: 0px;
+}
+
+.publications .show-more {
+  padding: 0.5rem 1rem;
+  border: none;
+  border-radius: 8px;
+  color: #ffffff;
+  background-color: var(--global-theme-color);
+  box-shadow: none;
+  transition: background-color 0.3s ease;
+}
+
+.publications .show-more:hover {
+  background-color: var(--global-hover-color);
+}

assets/css/main.scss

@@ -11,6 +11,5 @@ $max-content-width: {{ site.max_width }};
   "themes",
   "layout",
   "base",
-  "distill",
-  "publications"
+  "distill"
 ;