restruct: updated sass version and rules

src/styles/_option.scss

@@ -0,0 +1,40 @@
+.option {
+  font-size: 1em;
+
+  input {
+    display: none;
+  }
+
+  span {
+    // user-select: none;
+    // -moz-user-select: none;
+    // -webkit-user-select: none;
+
+    width: 100%;
+    text-align: center;
+
+    cursor: pointer;
+
+    padding: 0.5em 0.55em;
+
+    display: inline-block;
+    position: relative;
+
+    transition: all 0.2s;
+
+    border-radius: 0.5em;
+
+    &:not(.checked) {
+      background-color: #585858;
+
+      &::before {
+        box-shadow: none;
+      }
+    }
+  }
+
+  &:focus span {
+    // outline: 1px solid white;
+    border: none;
+  }
+}