feat: add tooltip to subscribe bell

src/fellchensammlung/static/fellchensammlung/css/styles.css

@@ -288,42 +288,43 @@ a.btn, a.btn2, a.nav-link {
 }
 
 .tooltip {
-  position: relative;
-  display: inline-block;
-  border-bottom: 1px dotted black;
+    position: relative;
+    display: inline-block;
 }
 
 .tooltip .tooltiptext {
-  visibility: hidden;
-  width: 200px;
-  background-color: var(--primary-dark-one);
-  color: var(--secondary-light-one);
-  text-align: center;
-  border-radius: 6px;
-  padding: 5px 0;
-  position: absolute;
-  z-index: 1;
-  bottom: 125%;
-  left: 50%;
-  margin-left: -100px;
-  opacity: 0;
-  transition: opacity 0.3s;
+    font-size: 1rem;
+    font-weight: normal;
+    visibility: hidden;
+    width: 200px;
+    background-color: var(--primary-dark-one);
+    color: var(--secondary-light-one);
+    text-align: center;
+    border-radius: 6px;
+    padding: 5px 0;
+    position: absolute;
+    z-index: 1;
+    bottom: 125%;
+    left: 50%;
+    margin-left: -100px;
+    opacity: 0;
+    transition: opacity 0.3s;
 }
 
 .tooltip .tooltiptext::after {
-  content: "";
-  position: absolute;
-  top: 100%;
-  left: 50%;
-  margin-left: -5px;
-  border-width: 5px;
-  border-style: solid;
-  border-color: var(--primary-dark-one) transparent transparent transparent;
+    content: "";
+    position: absolute;
+    top: 100%;
+    left: 50%;
+    margin-left: -5px;
+    border-width: 5px;
+    border-style: solid;
+    border-color: var(--primary-dark-one) transparent transparent transparent;
 }
 
 .tooltip:hover .tooltiptext {
-  visibility: visible;
-  opacity: 1;
+    visibility: visible;
+    opacity: 1;
 }
 
 /*********************/