/* ============================================================
   css/articles.css — Article-type styles for MetalWeightPro
   Loaded IN ADDITION to style.css for articles/ pages only.
   BASE rules (reset, variables, header, footer, nav) live in style.css.
   SHARED rules (.calc-btn, .table-wrap, .data-table, .faq-item,
                 .breadcrumb, .data-table caption) live in style.css.
   DO NOT duplicate those blocks here.
   ============================================================ */

/* ── Article Container ──────────────────────────────────────── */
.article-container {
  max-width: 780px;
  padding-top: var(--space-lg);
  padding-bottom: var(--space-2xl);
  overflow-x: hidden;
}

/* ── Article Shell ──────────────────────────────────────────── */
.article {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  overflow-wrap: break-word;
  word-break: break-word;
  min-width: 0;
}

.article__header {
  border-bottom: 2px solid var(--accent);
  padding-bottom: var(--space-md);
}

.article__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.article__meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* ── Hero & Infographic Figures ─────────────────────────────── */
.article__hero,
.article__infographic {
  margin: 0;
}

.article__hero img,
.article__infographic img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.article__hero-caption {
  font-size: 0.76rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: var(--space-xs);
  font-style: italic;
}
.article__infographic figcaption {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: var(--space-sm);
  text-align: center;
  font-style: italic;
}

/* ── Key Facts Box ──────────────────────────────────────────── */
.article__keyfacts {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
}

.article__keyfacts-title {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: var(--space-sm);
  /* Override article h2 styles */
  border-bottom: none !important;
  padding-bottom: 0 !important;
}

.article__keyfacts ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.article__keyfacts ul li strong {
  color: var(--text-primary);
}

/* ── Article Body Typography ────────────────────────────────── */
.article h2 {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.5vw, 1.35rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--border);
}

.article p {
  color: var(--text-secondary);
  line-height: 1.78;
  font-size: 0.97rem;
}

.article p strong {
  color: var(--text-primary);
}

.article em {
  color: var(--text-primary);
}

.article ul,
.article ol {
  padding-left: 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 5px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.68;
}

/* Article tables: first-cell override — mono font for numerical data */
.article .data-table td:first-child {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.88rem;
}

/* ── FAQ Section ────────────────────────────────────────────── */
.article__faq {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.article__faq > h2 {
  margin-bottom: 0;
}

/* ── CTA Block ──────────────────────────────────────────────── */
.article__cta {
  background: var(--accent-glow);
  border: 1px solid var(--accent-dim);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
}

.article__cta p {
  color: var(--text-primary) !important;
  font-size: 1rem !important;
  font-weight: 600;
  margin: 0;
}

.article__cta .calc-btn {
  width: auto;
  padding: 12px var(--space-xl);
  font-size: 0.92rem;
  text-decoration: none;
  display: inline-flex;
}

/* ── WhatsApp Share Button ──────────────────────────────────── */
.article__share-wa {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: #25d366;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  text-decoration: none;
  align-self: flex-start;
  transition: opacity var(--tr);
}

.article__share-wa:hover {
  opacity: 0.88;
  color: #fff;
}

/* ── Responsive — Article ───────────────────────────────────── */
@media (max-width: 768px) {
  .article__title { font-size: 1.45rem; }
}

@media (max-width: 480px) {
  .article-container { padding-top: var(--space-md); }
  .article__title { font-size: 1.25rem; }
  .article__cta .calc-btn {
    width: 100%;
    justify-content: center;
  }
  .article__share-wa { align-self: stretch; justify-content: center; }
}

/* ── Articles Hero ──────────────────────────────────────────── */
.articles-hero {
  padding: var(--space-md) 0 var(--space-lg);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--space-xl);
}

.articles-hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.articles-hero__sub {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 620px;
  line-height: 1.65;
}

/* ── Article Grid ───────────────────────────────────────────── */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  padding-bottom: var(--space-2xl);
}

@media (max-width: 900px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Article Card ───────────────────────────────────────────── */
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--tr), box-shadow var(--tr);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  border-color: var(--border-light);
  box-shadow: var(--shadow-card);
}

.article-card__body {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  flex: 1;
}

.article-card__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--accent-dim);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  align-self: flex-start;
}

.article-card__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.article-card__title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--tr);
}

.article-card__title a:hover {
  color: var(--accent);
  opacity: 1;
}

.article-card__excerpt {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.68;
  flex: 1;
}

.article-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border);
  margin-top: var(--space-xs);
}

.article-card__meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.article-card__cta {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-decoration: none;
  transition: opacity var(--tr);
}

.article-card__cta:hover { opacity: 0.75; }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 480px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .articles-hero__title { font-size: 1.6rem; }
}
/* ── Filter Bar ─────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: var(--space-lg);
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
  cursor: pointer;
  transition: color var(--tr), border-color var(--tr), background var(--tr);
}

.filter-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-light);
}

.filter-btn.is-active {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow);
}

.filter-btn__count {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
  background: var(--bg-primary);
  border-radius: 20px;
  padding: 1px 7px;
}

.filter-btn.is-active .filter-btn__count {
  color: var(--accent);
  background: var(--accent-glow);
}

.article-card[data-category].is-hidden {
  display: none;
}

.filter-empty {
  display: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: var(--space-lg) 0;
}

.filter-empty.is-visible {
  display: block;
}

@media (max-width: 600px) {
  .filter-bar { gap: 6px; }
  .filter-btn { font-size: 0.7rem; padding: 5px 10px; }
}

/* ── Related Articles — Phase E ─────────────────────────────── */
.related-articles {
  margin: var(--space-xl) 0 var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  border-left: 3px solid var(--accent);
  background: var(--bg-card);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.related-articles__heading {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.related-articles__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-lg);
}

.related-articles__link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  transition: color var(--tr);
}

.related-articles__link:hover { color: var(--accent); opacity: 1; }

.related-articles__link--tool {
  color: var(--accent);
  font-weight: 700;
  font-family: var(--font-display);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}