/**
 * Single Post CSS — U.S. Green Magnesium Americana
 * Used by: single.php
 * Sections: ARTICLE HEADER, ARTICLE BODY, BLOCKQUOTES, CONTACTS, BACK LINK
 */

/* ══════════════════════════════════════════
   ARTICLE HEADER
   ══════════════════════════════════════════ */
.article-header {
  padding: 200px 40px 60px;
  border-bottom: 4px solid var(--red-accent);
  position: relative;
  overflow: hidden;
}
.article-header::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image:
    linear-gradient(var(--blue-accent) 1px, transparent 1px),
    linear-gradient(90deg, var(--blue-accent) 1px, transparent 1px);
  background-size: 80px 80px;
}
.article-header-inner {
  position: relative;
  max-width: 880px;
  margin: 0 auto;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.article-category {
  font-family: "Oswald", sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  background: var(--red-accent);
  color: var(--white);
  padding: 6px 14px;
}
.article-date {
  font-family: "Oswald", sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-dim);
}
.article-title {
  font-family: "Oswald", sans-serif;
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 600;
  line-height: 1.15;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: -0.5px;
}

/* ══════════════════════════════════════════
   ARTICLE BODY
   ══════════════════════════════════════════ */
.article-body {
  padding: 80px 40px 60px;
}
.article-content {
  max-width: 760px;
  margin: 0 auto;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-secondary);
}
.article-content > p {
  margin-bottom: 24px;
}
.article-content p strong,
.article-content strong {
  color: var(--white);
  font-weight: 600;
}
.article-content a {
  color: var(--blue-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(59, 130, 246, 0.4);
}
.article-content a:hover {
  text-decoration-color: var(--blue-accent);
  opacity: 1;
}

/* Headings inside article content */
.article-content h2,
.article-content h3,
.article-content h4 {
  font-family: "Oswald", sans-serif;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 40px 0 16px;
}
.article-content h2 {
  font-size: 26px;
}
.article-content h3 {
  font-size: 20px;
}
.article-content h4 {
  font-size: 16px;
}

/* Lists */
.article-content ul,
.article-content ol {
  margin: 0 0 24px 4px;
  padding-left: 0;
  list-style: none;
}
.article-content ul li,
.article-content ol li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 10px;
}
.article-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 8px;
  height: 2px;
  background: var(--blue-accent);
}
.article-content ol {
  counter-reset: item;
}
.article-content ol li {
  counter-increment: item;
}
.article-content ol li::before {
  content: counter(item) ".";
  position: absolute;
  left: 0;
  top: 0;
  font-family: "Oswald", sans-serif;
  font-weight: 700;
  color: var(--blue-accent);
}

/* Featured image / paired logos */
.article-logos {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  padding: 32px 0;
  margin-bottom: 32px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.article-logos img {
  height: 56px;
  width: auto;
  opacity: 0.85;
  filter: brightness(1.1);
}
.article-logos .logo-divider {
  width: 1px;
  height: 48px;
  background: var(--border-strong);
}
.article-feature-image {
  margin: 32px 0;
}
.article-feature-image img {
  width: 100%;
  height: auto;
}

/* Blockquotes */
.article-content blockquote {
  margin: 32px 0;
  padding: 28px 32px;
  background: var(--navy-card);
  border-left: 4px solid var(--red-accent);
}
.article-content blockquote p {
  font-family: "Source Sans 3", sans-serif;
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-primary);
  font-style: italic;
  margin-bottom: 16px;
}
.article-content blockquote p:last-child {
  margin-bottom: 0;
}

/* Decorative inline divider */
.article-divider {
  height: 1px;
  background: var(--border-strong);
  margin: 48px 0;
  max-width: 200px;
}

/* Article-end contacts grid */
.article-contacts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  margin: 48px 0;
}
.ac-cell {
  padding: 28px 32px;
  background: var(--navy-card);
  border-left: 3px solid var(--blue-accent);
}
.ac-label {
  font-family: "Oswald", sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 10px;
}
.ac-name {
  font-family: "Oswald", sans-serif;
  font-size: 18px;
  font-weight: 600;
  color: var(--white);
  text-transform: uppercase;
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}
.ac-detail {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
}
.ac-detail a {
  color: var(--blue-accent);
}

/* Back link */
.back-link {
  max-width: 760px;
  margin: 0 auto 80px;
  padding: 0 40px;
}
.back-link a {
  font-family: "Oswald", sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--blue-accent);
}
.back-link a:hover {
  color: var(--blue-light);
  opacity: 1;
}

/* ══════════════════════════════════════════
   404
   ══════════════════════════════════════════ */
.error-404 {
  padding: 200px 40px 80px;
  text-align: center;
  border-bottom: 4px solid var(--red-accent);
}
.error-404 .err-num {
  font-family: "Oswald", sans-serif;
  font-size: clamp(96px, 18vw, 200px);
  font-weight: 700;
  line-height: 1;
  color: var(--blue-accent);
  margin-bottom: 16px;
}
.error-404 h1 {
  font-family: "Oswald", sans-serif;
  font-size: clamp(28px, 4vw, 44px);
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}
.error-404 p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

/* ══════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════ */
@media (max-width: 768px) {
  .article-header {
    padding: 160px 24px 48px;
  }
  .article-body {
    padding: 48px 24px;
  }
  .article-content {
    font-size: 16px;
  }
  .article-content blockquote {
    padding: 20px 22px;
  }
  .article-contacts {
    grid-template-columns: 1fr;
  }
  .back-link {
    padding: 0 24px;
  }
  .error-404 {
    padding: 160px 24px 60px;
  }
}