@skeleton-content-padding: 16px;
@skeleton-animation-background: linear-gradient(
  90deg,
  hsla(0, 0%, 100%, 0),
  hsla(0, 0%, 100%, 0.3),
  hsla(0, 0%, 100%, 0)
);
@skeleton-avatar-size: 40px;
@skeleton-avatar-border-radius: 50%;
@skeleton-avatar-margin-right: 16px;
@skeleton-avatar-background-color: rgba(0, 0, 0, 0.12);
@skeleton-title-width: 50%;
@skeleton-title-border-radius: 0px;
@skeleton-title-background-color: rgba(0, 0, 0, 0.12);
@skeleton-row-height: 12px;
@skeleton-row-border-radius: 0px;
@skeleton-row-margin-top: 12px;
@skeleton-card-height: 160px;
@skeleton-card-border-radius: 0px;
@skeleton-card-margin-bottom: 16px;
@skeleton-card-background-color: rgba(0, 0, 0, 0.12);

@keyframes m-skeleton-animation {
  from {
    transform: translateX(-100%);
  }

  to {
    transform: translateX(100%);
  }
}

.m-skeleton {
  width: 100%;

  &__content {
    padding: @skeleton-content-padding;
  }

  &__card {
    position: relative;
    overflow: hidden;
    width: 100%;
    height: @skeleton-card-height;
    background-color: @skeleton-card-background-color;
    margin-bottom: @skeleton-card-margin-bottom;
    border-radius: @skeleton-card-border-radius;
    transition: background-color 0.25s;
  }

  &__article {
    display: flex;
    width: 100%;
  }

  &__avatar {
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
    width: @skeleton-avatar-size;
    height: @skeleton-avatar-size;
    border-radius: @skeleton-avatar-border-radius;
    background-color: @skeleton-avatar-background-color;
    margin-right: @skeleton-avatar-margin-right;
    transition: 0.25s background-color;
  }

  &__section {
    width: 100%;
    padding-top: 8px;
  }

  &__title {
    position: relative;
    overflow: hidden;
    width: @skeleton-title-width;
    height: @skeleton-row-height;
    background-color: @skeleton-title-background-color;
    border-radius: @skeleton-title-border-radius;
    transition: 0.25s background-color;
  }

  &__row {
    position: relative;
    overflow: hidden;
    width: 100%;
    height: @skeleton-row-height;
    background-color: @skeleton-title-background-color;
    margin-top: @skeleton-row-margin-top;
    border-radius: @skeleton-row-border-radius;
    transition: 0.25s background-color;
  }

  &__fullscreen {
    position: fixed;
    overflow: hidden;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    z-index: 1000;
    background-color: @skeleton-title-background-color;
    transition: 0.25s background-color;
  }

  &--animation {
    &::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: 1;
      animation: m-skeleton-animation 1s infinite;
      background: @skeleton-animation-background;
      transition: 0.25s background-color;
    }
  }
}