Add and use relay list settings

app/styles/app.css

@@ -8,6 +8,8 @@
   --link-color-visited: #6a4fbf;
   --marker-color-primary: #ea4335;
   --marker-color-dark: #b31412;
+  --danger-color: var(--marker-color-primary);
+  --danger-color-dark: var(--marker-color-dark);
 }
 
 html,
@@ -301,7 +303,7 @@ body {
 }
 
 .photo-upload-item .btn-remove-photo:hover {
-  background: var(--marker-color-primary);
+  background: var(--danger-color);
 }
 
 .spin-animation {
@@ -565,6 +567,64 @@ body {
   padding: 0 1.4rem 1rem;
   animation: details-slide-down 0.2s ease-out;
   font-size: 0.9rem;
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+}
+
+.relay-list {
+  list-style: none;
+  padding: 0;
+  margin: 0 0 0.75rem;
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+}
+
+.relay-list li {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 0.25rem 0;
+  border-radius: 4px;
+  font-size: 0.9rem;
+  word-break: break-all;
+}
+
+.btn-remove-relay {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 24px;
+  height: 24px;
+  border-radius: 50%;
+  background-color: #fff;
+  border: 1px solid var(--danger-color);
+  color: var(--danger-color);
+  cursor: pointer;
+  padding: 0;
+  transition: all 0.1s ease;
+  flex-shrink: 0;
+}
+
+.btn-remove-relay svg {
+  stroke: currentcolor;
+}
+
+.btn-remove-relay:hover,
+.btn-remove-relay:active {
+  background-color: var(--danger-color);
+  color: #fff;
+}
+
+.add-relay-input {
+  display: flex;
+  gap: 0.5rem;
+}
+
+.btn-link.reset-relays {
+  margin-top: 0.75rem;
+  font-size: 0.85rem;
 }
 
 @keyframes details-slide-down {
@@ -639,6 +699,11 @@ select.form-control {
 }
 
 .settings-section .form-group {
+  margin-top: 0.5rem;
+  margin-bottom: 0;
+}
+
+.settings-section .form-group:first-of-type {
   margin-top: 1rem;
 }
 
@@ -1598,3 +1663,17 @@ button.create-place {
   max-width: 100%;
   border-radius: 0.25rem;
 }
+
+.btn-link {
+  background: none;
+  border: none;
+  padding: 0;
+  color: var(--link-color);
+  text-decoration: none;
+  cursor: pointer;
+  font: inherit;
+}
+
+.btn-link:hover {
+  text-decoration: underline;
+}