styles.less

@color-main: #1874cd;
@heading-font: 'Gloria Hallelujah', cursive;
@main-font: 'Roboto', sans-serif;
@color-even: #dedede;
@color-odd: #fff;

body {
  background: #5b656f;
  font-family: @main-font;
}

h1 {
  font-family: @heading-font;
  text-align: center;
  color: #fff;
  font-size: 3em;
}

h1, h2 {
  margin: 0;
}

p {
  margin: 0;
}

.content {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  max-width: 96%;
}

.white-box {
  background: #fff;
  border-radius: 3px;
  padding: 20px;
  min-height: 200px;
  max-height: 600px;
  overflow: auto;

  h2 {
    color: @color-main;
    font-size: 1.4em;
  }
}

.button {
  -webkit-appearance: none;
  border-radius: 0;
  border: 0;
  background: @color-main;
  color: #fff;
  padding: 5px 10px;
  height: 30px;
  &:hover {
    cursor: pointer;
  }
  &.delete-all {
    margin-top: 10px; 
  }
}

.task-list {
  font-family: @main-font;
  margin: 20px 0 20px;
  font-size: 1.2em;
  border: 1px solid #000;

  .task {
    display: flex;
    justify-content: space-between;
    flex-direction: row;
    flex-wrap: wrap;
    padding: 10px;

    &.even {
      background: @color-even;
    }

    &.odd {
      background: @color-odd;
    }

    .delete.button {
      margin-left: 15px;
    }

    .trashed {
      vertical-align: middle;
      margin-left: 15px;
    }

    &.is-trashed span {
      text-decoration: line-through;
    }
  }
}

.add-task {
  .task-name {
    display: block;
    margin: 10px 0;

    input {
      width: 100%;
      height: 40px;
      border-radius: 3px;
      border: 1px solid #d3d3d3;
      padding: 5px;
      -webkit-appearance: none;
      font-size: 20px;
    }
  }
}