Use buttons more consistently

src/styles/components/color-picker.scss

@@ -1,15 +1,11 @@
 .color-picker-container {
   display: flex;
   justify-content: center;
+  align-items: center;
 
   .verte__guide {
     border-radius: 100%;
     border: 1px solid $grey-light;
     box-shadow: $card-shadow;
   }
-
-  a.reset {
-    font-size: .9em;
-    padding-left: .5rem;
-  }
 }

src/styles/components/datepicker.scss

@@ -15,7 +15,7 @@
 		border-radius: $radius;
 		box-shadow: $card-shadow;
 
-		a {
+		a:not(.button) {
 			display: flex;
 			align-items: center;
 			padding: 0 .5rem;
@@ -49,11 +49,11 @@
 				width: 2rem;
 				text-align: center;
 			}
-
-			&.button {
-				margin: 1rem;
-				width: calc(100% - 2rem);
-			}
+		}
+			
+		a.button {
+			margin: 1rem;
+			width: calc(100% - 2rem);
 		}
 
 		.flatpickr-calendar {

src/styles/theme/content.scss

@@ -55,3 +55,7 @@
     font-size: 1rem;
   }
 }
+
+.underline-none {
+  text-decoration: none !important;
+}