discourse-solved/assets/stylesheets/solutions.scss

.solved-panel,
.post-controls .accepted,
.fa.accepted,
.accepted-text {
  color: green;
  .d-icon {
    color: currentColor;
  }
}

.post-controls span:not(.d-button-label) {
  display: inline-flex;
  align-items: baseline;
}

.post-controls .accepted-text {
  display: inline-block;
  font-size: inherit;
  margin-right: -3px;
  z-index: 2;
}

// you can style accepted answers however your want
.quote.accepted-answer {
  //  background-color: #E9FFE0;
}

.mobile-view .solved-panel {
  margin-bottom: 15px;
}

.solved-panel {
  .by {
    display: none;
  }

  margin-top: 20px;
  margin-bottom: 0px;
  font-size: 13px;
  // margin-bottom: 0px;
  // padding: 4px 0px;
  //border-top: 1px solid #ddd;
  //background-color: #E9FFE0;
}

aside.quote .title.title-only {
  padding: 12px;
}