<div class="selector selector_seven">
  <h2>[attr*=value]</h2>
  <img src="//placehold.it/150/150" alt="abstract art">
  <img src="//placehold.it/150/150" alt="something to eat">
  <img src="//placehold.it/150/150" alt="athlete starting a new sport">
</div>

@import url("https://fonts.googleapis.com/css2?family=Montserrat:wght@200;300;400;500;600;700&family=Raleway:wght@200;300;400;500;600;700&display=swap");
* {
  background: #000;
  color: #fff;
  font-size: 1.5rem;
  font-family: "Raleway", sans-serif;
}
h3,
h2 {
  font-size: 3rem;
  background-image: linear-gradient(25deg, #002657, #662b54, #a9264f, #ec004a);
  padding: 1em;
  font-weight: 200;
}
h2 {
  font-size: 2rem;
}
.selector {
  text-align: center;
  padding: 100px 0 0 0;
}

@media (max-width: 700px) {
  * {
    font-size: 1rem;
  }
  h3 {
    font-size: 2rem;
  }
}

/* [attr*=value] */
img[alt*="art"] {
  border: 3px solid lightgreen;
}