index.scss

html,
body {
  height: 100%;
  background-color: #fff;
}

.submit-answer {
  .detail-header {
    background-color: #fff;
    border-bottom: 1px solid #ddd;
  }

  .content {
    padding: 32px 16px;
  }

  .cost {
    position: relative;
    font-size: 18px;
    color: #333;
    text-align: center;
    margin-bottom: 30px;

    @mixin pseudo {
      content: "";
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      display: block;
      width: 16px;
      height: 11px;
      background: url("./line.png") no-repeat;
      background-size: contain;
    }

    $dis: 25%;

    &::before {
      @include pseudo;
      left: $dis;
    }

    &::after {
      @include pseudo;
      transform: scale(-1, 1) translateY(-50%);
      right: $dis;
    }
  }

  .answers {
    display: flex;
    flex-wrap: wrap;
    width: 80%;
    margin: 0 auto 60px;

    li {
      $size: 34px;
      width: $size;
      height: $size;
      margin-right: 25px;
      margin-bottom: 16px;
      line-height: $size;
      border-radius: 50%;
      border: 1px solid #09f;
      color: #09f;
      text-align: center;
      font-size: 18px;

      &:nth-of-type(5n) {
        margin-right: 0;
      }

      &.selected {
        background-color: #09f;
        color: #fff;
      }

      &.wrong {
        background-color: #e64949;
        border-color: #e64949;
        color: #fff;
      }

      &.unselect {
        border: 1px solid #e64949;
        color: #e64949;
      }

      &.correct {
        background-color: #2cdbaf;
        border-color: #2cdbaf;
        color: #fff;
      }
    }
  }

  .score {
    margin-bottom: 30px;
    font-size: 21px;
    color: #09f;
    text-align: center;
  }

  button {
    width: 343px;
    height: 44px;
    background: #09f;
    border-radius: 22px;
    -webkit-appearance: none;
    outline: 0;
    border: 0;
    color: #fff;
    font-size: 18px;
  }
}