/* 
=========================
=     GLOBAL STYLE      =
=========================
*/
#main {
  container: content / inline-size;
}

.section__inner {
  max-width: 1230px;
  margin-inline: auto;
}

/* 
=========================
=    CATEGORY HEADER    =
=========================
*/
.category-header:not(.has-background) {
  padding-block: 3.75em 2em;
}

.category-header.has-background {
  --category-header-mb: 2em;
  position: relative;
  margin-bottom: var(--category-header-mb);
}

.category-header.has-background.has-children {
  --category-header-mb: 5em;
}

.category-header.has-background .category-header__background {
  position: relative;
  z-index: 1;
  background: var(--tertiary-lightest);
}

.category-header.has-background .section__inner {
  position: absolute;
  z-index: 2;
  inset: 0;
}

.category-header.has-background .category-header__content {
  position: absolute;
  left: 0;
  bottom: 0;
  display: flex;
  gap: 1em;
}

.category-header.has-background :is(.category-header__title, .category-header__relate-category) {
  font-size: clamp(2em, 5vw, 5em);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: -.04em;
  -webkit-text-stroke: 1px var(--gray-dark);
}

.category-header.has-background .category-header__title {
  color: #fff;
  -webkit-text-stroke-width: 0;
}

.category-header__relate-category {
  color: rgba(255, 255, 255, .7);
  transition: color 300ms;

  &:hover {
    color: rgba(255, 255, 255, .9);
  }
}

.category-header:not(.has-background) .category-header__content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.category-header:not(.has-background) .category-header__title {
  margin-bottom: 0;
  font-weight: 600;
  font-size: 3em;
  line-height: 1.2;
  color: #000;
  text-transform: uppercase;
  text-align: center;
  border-bottom: 2px solid #333;
  padding-bottom: 1.35rem;
}

.category-header.has-background .category-header__children {
  position: absolute;
  inset: auto 0 -3em 0;
}

.category-header__children {
  display: flex;
  justify-content: center;
  gap: 1.5em;
  padding-block: .625em;
  border-bottom: 1px solid var(--gray-lightest);
}

.category-header__child {
  display: block;
  text-transform: uppercase;
  color: #000;
  transition: color 300ms;

  &:hover {
    color: var(--tertiary-medium);
  }
}

@container content (width < 1230px) {
  .category-header__background .section__inner {
    padding-inline: .625em;
  }
}

/* 
=========================
=     FEATURED POSTS    =
=========================
*/
.category-featured-post {
  margin-bottom: 3.125em;
}

.featured-posts__list {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-template-rows: repeat(3, auto);
  gap: 1em;
}

.featured-post:nth-child(1) {
  grid-column: 1 / span 8;
  grid-row: 1 / span 2;

  & .featured-post__content {
    padding-inline: 1em;
  }

  & .featured-post__title {
    font-size: 1.3em;
  }

  & :is(.featured-post__title, .featured-post__excerpt) {
    text-align: center;
  }
}

.featured-post:nth-child(2) {
  grid-column: 9 / span 4;
  grid-row: 1 / span 1;
}

.featured-post:nth-child(3) {
  grid-column: 9 / span 4;
  grid-row: 2 / span 1;
}

.featured-post:nth-child(n + 4) {
  grid-column: span 3;
  grid-row: 3;
}

.featured-post__thumbnail {
  display: block;
  margin-bottom: .625em;

  & > img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
  }
}

.featured-post__title {
  font-weight: 700;
}

.featured-post__excerpt {
  /* make it only take 3 lines */
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

@container content (width < 550px) {
  .featured-posts__list {
    grid-template-rows: repeat(4, auto);
  }

  /* select nth-child from 4, 5 */
  .featured-post:nth-child(n + 4):nth-child(-n + 5) {
    grid-column: span 6;
    grid-row: 3;
  }

  /* select nth-child from 6 */
  .featured-post:nth-child(n + 6) {
    grid-column: span 6;
    grid-row: 4;
  }
}

/* 
=========================
=    CATEGORY LATEST    =
=========================
*/
.category-latest {
  margin-bottom: 3.125em;
}

.category-latest > .section__inner {
  display: grid;
  grid-template-columns: 70% 1fr;
  gap: 2em;
}

.category-latest .section__title {
  grid-column: span 2;
}

.latest__post {
  display: grid;
  grid-template-columns: 33% 1fr;
  gap: .625em;

  &:not(:last-child) {
    padding-bottom: .625em;
    margin-bottom: .625em;
    border-bottom: 1px solid var(--gray-lightest);
  }
}

.latest__post-image {
  grid-row: 1 / span 2;

  & > img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
  }
}

.latest__post-title {
  font-size: 1.1em;
  font-weight: 700;
}

.latest__post-date {
  font-size: .85em;
  padding-block: .3125em;
}

.latest__post-excerpt {
  grid-column: 2;
  margin-bottom: 0;
}

/* SIDEBAR */
.latest__sidebar {
  position: relative;
}

.sidebar__spotlight {
  --spotlight-top: 80px;
  position: sticky;
  top: var(--spotlight-top);

  --spotlight-bg: color-mix(in srgb, var(--tertiary-lightest) 100%, #fff 50%);
  padding: calc(.625em * 3);
  background-color: var(--spotlight-bg);

  &::before {
    z-index: 1;
    content: 'Tiêu điểm';
    position: absolute;
    opacity: .35;
    right: 0;
    top: 0;
    line-height: 1;
    text-orientation: sideways;
    rotate: 180deg;
    text-transform: uppercase;
    color: var(--spotlight-bg);
    -webkit-text-stroke: 2px var(--tertiary-medium);
    font-size: 70px;
    font-weight: 800;
    white-space: nowrap;
    writing-mode: vertical-rl;
  }
}

.spotlight__header {
  margin-bottom: 1.35em;
  display: flex;
  align-items: center;
  gap: 1em;

  &::before {
    content: '';
    display: block;
    height: 1.5em;
    width: .3125em;
    background-color: var(--tertiary-darker);
  }
}

.spotlight__title {
  width: fit-content;
  color: #000;
  text-transform: uppercase;
  font-weight: 600;
}

.spotlight__posts {
  position: relative;
  z-index: 2;
}

.spotlight__post {
  &:not(:last-child) {
    margin-bottom: 1em;
  }

  .spotlight__post-title {
    font-weight: 700;
  }

  &:first-child {
    & > .spotlight__post-title {
      font-size: 2em;
      line-height: 1.2;
    }
  }

  &:not(:first-child) .spotlight__post-title {
    display: flex;
    gap: .625em;

    &:before {
      position: relative;
      top: .625em;
      --spotlight-title-dot-size: .3125em;
      flex-shrink: 0;
      content: '';
      display: block;
      width: var(--spotlight-title-dot-size);
      height: var(--spotlight-title-dot-size);
      border-radius: 50%;
      background-color: var(--tertiary-medium);
    }
  }

  &:not(:first-child):not(:last-child) {
    padding-bottom: .625em;
    border-bottom: 1px solid var(--tertiary-medium);
  }
}

@container content (width < 850px) {
  .section__inner {
    padding-inline: .625em;
  }

  .category-latest > .section__inner {
    grid-template-columns: 1fr;
  }

  .category-latest .section__title {
    grid-column: span 1;
  }

  .latest__sidebar {
    display: none;
  }
}

@container content (width < 550px) {
  .latest__post-image {
    grid-column: 1;
  }

  .latest__post-header {
    grid-column: 2;
    grid-row: 1;
  }

  .latest__post-excerpt {
    grid-column: 1 / span 2;
    grid-row: 2;
  }
}