style.css

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  color: hsl(330, 4%, 10%);
  background-color: hsl(0, 0%, 96%);
}

header {
  padding: 12px 12px 0;
}

.logo {
  width: 102px;
}

.mixes {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.mix {
  max-width: 400px;
  margin-bottom: 32px;
  padding: 0;
  overflow: hidden;
  background-color: hsl(0, 0%, 98%);
}

.mix img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  vertical-align: bottom;
}

audio {
  width: 100%;
}

.mix__content {
  padding: 24px;
  text-align: center;
}

.mix__author {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 12px;
  text-decoration: none;
  text-transform: lowercase;
  color: hsl(352, 81%, 59%);
}

.link {
  position: relative;
}

.link:before {
  content: "";
  position: absolute;
  width: 100%;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: hsl(352, 81%, 59%);
  visibility: hidden;
  -o-transform: scaleX(0);
  transform: scaleX(0);
  -o-transition: all 0.3s ease-in-out 0s;
  transition: all 0.3s ease-in-out 0s;
}

.link:hover:before {
  visibility: visible;
  -o-transform: scaleX(1);
  transform: scaleX(1);
}

.mix__title {
  margin: 0;
  font-size: 20px;
}

.mix__title a {
  text-decoration: none;
  color: hsl(330, 4%, 10%);
}

@media all and (min-width: 720px) {
  header {
    padding: 32px 32px 0;
  }
  .logo {
    width: 202px;
  }
  main {
    padding: 32px 16px;
  }
  .mixes {
    justify-content: flex-start;
  }
  .mix {
    margin: 16px;
  }
}