Decreasing Opacity challenge not completable

Tell us what’s happening:
So its telling me to change the opacity of the anchor tags by selecting the links class, so I add opacity: 0.7; under the links class within the style element and it still doesn’t complete even after running the code multiple times. I’ve also watched the video and gone to copying and pasting the code but even that still doesn’t complete the challenge. I wanted to know what the problem or what I could be doing wrong that isn’t allowing me to complete the challenge.

Your code so far

h4 {
  text-align: center;
  background-color: rgba(45, 45, 45, 0.1);
  padding: 10px;
  font-size: 27px;
p {
  text-align: justify;
.links {
  text-align: left;
  color: black;
  opacity: 0.7;
#thumbnail {
  box-shadow: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
.fullCard {
  width: 245px;
  border: 1px solid #ccc;
  border-radius: 5px;
  margin: 10px 5px;
  padding: 4px;
.cardContent {
  padding: 10px;
.cardText {
  margin-bottom: 30px;
<div class="fullCard" id="thumbnail">
<div class="cardContent">
  <div class="cardText">
    <em><p>Google was founded by Larry Page and Sergey Brin while they were <u>Ph.D. students</u> at <strong>Stanford University</strong>.</p></em>
  <div class="cardLinks">
    <a href="" target="_blank" class="links">Larry Page</a><br><br>
    <a href="" target="_blank" class="links">Sergey Brin</a>

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Safari/605.1.15.

Challenge: Decrease the Opacity of an Element

Link to the challenge:

Your code passes for me in Firefox and in Chrome. Check any extensions you might have installed as they could be causing a conflict.

Just as you replied i was searching the forum and found that others were not having any problems in chrome and decided to try it on that browser and it ran perfectly. thank you for letting me know this as well so that in a future case of this happening ill take a look into wether it could be my browser or conflicting errors with extensions.

There is a bug in the way the test interacts with Safari, but I have submitted a fix and should be implemented on the site in the next few days.