/* ====== ARTICLE TEMPLATE ====== */

/* --- Article wrapper --- */

#article {
  background-color: var(--color-white);
  color: var(--color-black);
}

/* --- Nav: solid blue bar matching other pages --- */

#article .hero-nav {
  display: block;
  background-color: var(--color-blue);
  padding-bottom: 0;
}

/* Inner row keeps the logo / links / hamburger in a flex row */
#article .hero-nav__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* --- Reading progress bar --- */

.article-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: var(--color-blue);
  transform: scaleX(0);
  transform-origin: left;
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.3s, top 0.3s ease;
}

.article-progress.is-visible {
  opacity: 1;
}

/* --- Article back bar --- */

.article-back-bar {
  margin: 1.8vw calc(-1 * var(--site-gutter)) 0;
  width: calc(100% + 2 * var(--site-gutter));
  background-color: var(--grey-200);
}

.article-back-bar__inner {
  max-width: var(--site-max-width);
  margin: 0 auto;
  padding: 0.5em var(--site-gutter);
}

.article-back-bar__link {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: var(--font-weight-bold);
  color: var(--grey-800);
  text-decoration: none;
  transition: color 0.2s;
}

.article-back-bar__link:hover {
  color: var(--color-blue);
}

/* --- Article content: two-column layout --- */

.article-content {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 0 clamp(2rem, 4vw, 4rem);
  max-width: var(--site-max-width);
  margin: 0 auto;
  padding: clamp(2rem, 3vw, 3rem) var(--site-gutter) clamp(4rem, 7vw, 8rem);
  align-items: start;
}

/* --- Article metadata (left column, sticky) --- */

.article-meta {
  grid-column: 1;
  padding-top: clamp(1rem, 2vw, 2rem);
  position: sticky;
  top: clamp(2rem, 3vw, 3rem);
}

.article-meta__category {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(0.85rem, 1vw, 1rem);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-dark);
  margin-bottom: 1em;
}

.article-meta__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 2.8vw, 3rem);
  font-weight: var(--font-weight-bold);
  line-height: 1.15;
  color: var(--color-blue);
  margin: 0 0 0.8em;
}

.article-meta__author {
  display: block;
  font-family: var(--font-body);
  font-size: clamp(0.9rem, 1.1vw, 1.05rem);
  font-weight: 500;
  color: var(--color-black);
  margin-bottom: 0.3em;
}

.article-meta__date {
  display: block;
  font-family: var(--font-body);
  font-size: clamp(0.9rem, 1.1vw, 1.05rem);
  font-weight: 400;
  color: var(--grey-800);
  margin-bottom: 0.4em;
}

.article-meta__source {
  font-family: var(--font-body);
  font-size: clamp(0.9rem, 1.1vw, 1.05rem);
  font-weight: 400;
  font-style: italic;
  color: var(--grey-800);
  margin: 0;
}

.article-meta__source a {
  color: var(--grey-800);
  text-decoration: underline;
  text-underline-offset: 0.15em;
  transition: color 0.2s;
}

.article-meta__source a:hover {
  color: var(--color-blue);
}

/* --- Right column (image + body) --- */

.article-right {
  grid-column: 2;
}

/* --- Hero image --- */

.article-hero-image {
  overflow: hidden;
  margin-bottom: clamp(2rem, 4vw, 4rem);
}

.article-hero-image img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
}

/* --- Article body typography --- */

.article-body p {
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.15vw, 1.1rem);
  font-weight: 400;
  line-height: 1.8;
  color: var(--grey-800);
  margin: 0 0 1.5em;
}

.article-body p:last-child {
  margin-bottom: 0;
}

/* Subheadings */
.article-body h2 {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 1.8vw, 1.7rem);
  font-weight: var(--font-weight-bold);
  line-height: 1.25;
  color: var(--color-black);
  margin: 2em 0 0.8em;
}

.article-body h2:first-child {
  margin-top: 0;
}

/* Bulleted lists */
.article-body ul {
  list-style: disc;
  padding-left: 1.5em;
  margin: 0 0 1.5em;
}

.article-body li {
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.15vw, 1.1rem);
  font-weight: 400;
  line-height: 1.8;
  color: var(--grey-800);
  margin-bottom: 0.8em;
}

.article-body li:last-child {
  margin-bottom: 0;
}

/* Ordered lists */
.article-body ol {
  list-style: decimal;
  padding-left: 1.5em;
  margin: 0 0 1.5em;
}

/* Blockquotes */
.article-body blockquote {
  border-left: 4px solid var(--color-blue);
  padding: 1em 0 1em 1.5em;
  margin: 0 0 1.5em;
}

.article-body blockquote p {
  font-style: italic;
  margin-bottom: 0.8em;
}

.article-body blockquote p:last-child {
  margin-bottom: 0;
}

/* YouTube video embed */
.article-hero-video {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  margin-bottom: clamp(2rem, 4vw, 4rem);
}

.article-hero-video iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* Links within body text */
.article-body a {
  color: var(--color-blue);
  text-decoration: underline;
  text-underline-offset: 0.15em;
  transition: opacity 0.2s;
}

.article-body a:hover {
  opacity: 0.7;
}

/* --- Article footer override --- */

#footer {
  background-color: var(--color-navy);
  margin-top: 0;
}

/* ====== MOBILE ====== */

@media (max-width: 768px) {

  .article-back-bar {
    display: none;
  }

  .article-content {
    grid-template-columns: 1fr;
    gap: var(--space-md);
    padding: var(--space-md) var(--site-gutter) var(--space-xl);
  }

  .article-meta {
    padding-top: 0;
    position: static;
  }

  .article-meta__title {
    font-size: clamp(1.5rem, 6vw, 2.2rem);
  }

  .article-hero-image {
    margin-left: calc(-1 * var(--site-gutter));
    margin-right: calc(-1 * var(--site-gutter));
    width: calc(100% + 2 * var(--site-gutter));
  }
}