/* ═══════════════════════════════════════════════════════════════════
   blog/style.css  —  Blog listing page + article page styles
   Supplements shared/site.css (do not duplicate tokens)
   ═══════════════════════════════════════════════════════════════════ */

/* ── Page wrapper ──────────────────────────────────────────────── */
body { padding: 0 16px; }
#app  { max-width: 860px; margin: 0 auto; padding-bottom: 60px; }

/* ═══════════════════════════════════════════════════════
   BLOG LISTING PAGE
   ═══════════════════════════════════════════════════════ */

/* ── Blog hero ─────────────────────────────────────────────────── */
.blog-hero {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 36px;
}

.blog-hero-label {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--accent);
  background: var(--accent-lo);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.blog-hero h1 {
  font-size: 2.6rem;
  font-weight: 800;
  background: linear-gradient(120deg, #4f8ef7 0%, #a78bfa 55%, #f5c842 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.15;
  margin: 0 0 14px;
}

.blog-hero p {
  font-size: 1rem;
  color: var(--text-dim);
  line-height: 1.7;
  max-width: 560px;
  margin: 0;
}

@media (max-width: 560px) {
  .blog-hero { padding: 44px 0 28px; }
  .blog-hero h1 { font-size: 1.9rem; }
}

/* ── Category filter pills ─────────────────────────────────────── */
.blog-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.blog-filter-btn {
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .18s, border-color .18s, color .18s;
  font-family: var(--font);
}
.blog-filter-btn:hover,
.blog-filter-btn.active {
  background: var(--accent-lo);
  border-color: rgba(79,142,247,.55);
  color: var(--accent);
}

/* ── Article count text ────────────────────────────────────────── */
.blog-count {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-bottom: 18px;
}

/* ── Blog grid ─────────────────────────────────────────────────── */
.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

/* ── Blog card (article listing card) ─────────────────────────── */
.blog-card {
  display: grid;
  grid-template-columns: 220px 1fr;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  color: var(--text);
  transition: transform .22s, box-shadow .22s, border-color .22s;
  position: relative;
}
.blog-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--card-accent, var(--accent));
  border-radius: var(--radius) var(--radius) 0 0;
}
.blog-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(79,142,247,.18);
  border-color: rgba(79,142,247,.45);
}

.blog-card-img {
  width: 220px;
  height: 148px;
  object-fit: cover;
  display: block;
  background: var(--surface2);
  border-right: 1px solid var(--border);
  flex-shrink: 0;
}

.blog-card-body {
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.blog-card-category {
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--accent);
  background: var(--accent-lo);
  padding: 3px 10px;
  border-radius: 20px;
  width: fit-content;
}

.blog-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.35;
  margin: 0;
}
.blog-card:hover .blog-card-title { color: var(--accent); }

.blog-card-excerpt {
  font-size: 0.8rem;
  color: var(--text-dim);
  line-height: 1.65;
  margin: 0;
  /* clamp to 3 lines */
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-meta {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}
.blog-card-meta time { font-weight: 500; }
.blog-card-meta .read-time::before { content: '· '; }

.blog-card-arrow {
  margin-left: auto;
  color: var(--accent);
  font-size: 1rem;
  transition: transform .18s;
}
.blog-card:hover .blog-card-arrow { transform: translateX(4px); }

/* Stacked layout on mobile */
@media (max-width: 620px) {
  .blog-card {
    grid-template-columns: 1fr;
  }
  .blog-card-img {
    width: 100%;
    height: 160px;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
}

/* ── Empty state ───────────────────────────────────────────────── */
.blog-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* ── SEO article on listing page ──────────────────────────────── */
.blog-about {
  margin-top: 56px;
}

/* ═══════════════════════════════════════════════════════
   ARTICLE PAGE
   ═══════════════════════════════════════════════════════ */

/* ── Article wrapper ───────────────────────────────────────────── */
.blog-article {
  padding-top: 16px;
}

/* ── Article header ────────────────────────────────────────────── */
.article-header {
  margin-bottom: 28px;
}

.article-category {
  display: inline-block;
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--accent);
  background: var(--accent-lo);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 14px;
}

.article-header h1 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.25;
  margin: 0 0 14px;
}

.article-meta {
  font-size: 0.78rem;
  color: var(--text-dim);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}
.article-meta strong { color: var(--text); }
.article-meta time   { font-weight: 500; }

@media (max-width: 560px) {
  .article-header h1 { font-size: 1.55rem; }
}

/* ── Hero figure ───────────────────────────────────────────────── */
.article-hero {
  margin: 0 0 36px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}
.article-hero img {
  width: 100%;
  height: auto;
  display: block;
}
.article-hero figcaption {
  font-size: 0.72rem;
  color: var(--text-dim);
  padding: 10px 16px;
  background: var(--surface);
  text-align: center;
  font-style: italic;
}

/* ── Article body typography ───────────────────────────────────── */
.blog-article h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  margin: 40px 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.blog-article h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  margin: 28px 0 10px;
  text-transform: uppercase;
  letter-spacing: .06em;
  font-size: 0.82rem;
}
.blog-article p {
  font-size: 0.93rem;
  color: var(--text-dim);
  line-height: 1.85;
  margin: 0 0 16px;
}
.blog-article strong { color: var(--text); font-weight: 600; }
.blog-article em     { color: var(--text); font-style: italic; }

.blog-article ul,
.blog-article ol {
  padding-left: 0;
  list-style: none;
  margin: 12px 0 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.blog-article ul li,
.blog-article ol li {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.7;
  padding-left: 20px;
  position: relative;
  counter-increment: ol-counter;
}
.blog-article ul li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}
.blog-article ol {
  counter-reset: ol-counter;
}
.blog-article ol li::before {
  content: counter(ol-counter) '.';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.8rem;
}

/* Inline body images */
.blog-article figure.body-figure {
  margin: 28px 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}
.blog-article figure.body-figure img {
  width: 100%;
  height: auto;
  display: block;
}
.blog-article figure.body-figure figcaption {
  font-size: 0.72rem;
  color: var(--text-dim);
  padding: 10px 16px;
  background: var(--surface);
  text-align: center;
  font-style: italic;
}

/* ── Try It Yourself section ───────────────────────────────────── */
.try-it-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin: 40px 0;
  position: relative;
}
.try-it-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent) 0%, #a78bfa 100%);
  border-radius: var(--radius) var(--radius) 0 0;
}
.try-it-section h2 {
  border-bottom: none !important;
  margin-top: 0 !important;
  padding-bottom: 0 !important;
}

.simulator-links {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 20px;
}

.sim-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  color: var(--text);
  transition: border-color .18s, background .18s;
}
.sim-link:hover {
  border-color: rgba(79,142,247,.5);
  background: rgba(79,142,247,.06);
}
.sim-link-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  width: 36px;
  text-align: center;
}
.sim-link-body { flex: 1; }
.sim-link-name {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent);
  display: block;
  margin-bottom: 3px;
}
.sim-link-desc {
  font-size: 0.75rem;
  color: var(--text-dim);
  line-height: 1.5;
}
.sim-link-arrow {
  color: var(--accent);
  font-size: 1rem;
  transition: transform .18s;
}
.sim-link:hover .sim-link-arrow { transform: translateX(4px); }

@media (max-width: 560px) {
  .try-it-section { padding: 20px 18px; }
}

/* ── Key Takeaways section ─────────────────────────────────────── */
.key-takeaways {
  background: rgba(79,142,247,.06);
  border: 1px solid rgba(79,142,247,.28);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin: 40px 0;
}
.key-takeaways h2 {
  border-bottom: none !important;
  margin-top: 0 !important;
  padding-bottom: 0 !important;
  margin-bottom: 18px !important;
}
.key-takeaways ul {
  margin: 0 !important;
}
.key-takeaways li {
  font-size: 0.9rem !important;
  color: var(--text) !important;
}

@media (max-width: 560px) {
  .key-takeaways { padding: 20px 18px; }
}

/* ── Related Articles section ──────────────────────────────────── */
.related-articles {
  margin: 40px 0;
}
.related-articles h2 {
  margin-bottom: 20px !important;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.related-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  text-decoration: none;
  color: var(--text);
  transition: border-color .18s, transform .18s;
  gap: 8px;
}
.related-card:hover {
  border-color: rgba(79,142,247,.45);
  transform: translateY(-2px);
}
.related-card-category {
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--accent);
}
.related-card-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
}
.related-card:hover .related-card-title { color: var(--accent); }
.related-card-excerpt {
  font-size: 0.75rem;
  color: var(--text-dim);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card-date {
  font-size: 0.68rem;
  color: var(--text-dim);
  margin-top: 4px;
}

/* ── FAQ section ───────────────────────────────────────────────── */
.faq-section {
  margin: 40px 0;
}
.faq-section h2 { margin-bottom: 20px !important; }

.faq-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 10px;
  overflow: hidden;
}
.faq-item summary {
  padding: 16px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--surface);
  transition: background .18s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.2rem;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform .2s;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item[open] summary { background: var(--surface2); }
.faq-answer {
  padding: 16px 20px;
  font-size: 0.875rem;
  color: var(--text-dim);
  line-height: 1.78;
  background: var(--surface);
  border-top: 1px solid var(--border);
}

/* ── Article footer / closing ──────────────────────────────────── */
.article-closing {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.article-closing p {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.8;
  margin-bottom: 14px;
}
.article-closing .cta-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  background: var(--accent);
  color: #fff;
  border-radius: 9px;
  text-decoration: none;
  font-size: 0.83rem;
  font-weight: 700;
  transition: background .18s, transform .18s;
}
.article-closing .cta-link:hover {
  background: #3a7de0;
  transform: translateY(-1px);
}

/* ── Blog footer ───────────────────────────────────────────────── */
.blog-footer {
  margin-top: 60px;
  padding: 24px 0 32px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.74rem;
  color: var(--text-dim);
}
.blog-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 14px;
  margin-bottom: 12px;
}
.blog-footer nav a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color .15s;
}
.blog-footer nav a:hover { color: var(--accent); }

/* ── Data Table ─────────────────────────────────────────── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin: 1.5rem 0 2rem;
  overflow-x: auto;
  display: block;
}
.data-table th,
.data-table td {
  padding: 0.55rem 0.9rem;
  text-align: left;
  border: 1px solid rgba(255,255,255,0.08);
}
.data-table thead tr {
  background: rgba(255,255,255,0.06);
}
.data-table th {
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}
.data-table tbody tr:nth-child(odd)  { background: rgba(255,255,255,0.02); }
.data-table tbody tr:nth-child(even) { background: transparent; }
.data-table tbody td:first-child { font-weight: 500; color: var(--text); }

/* ── Code block ─────────────────────────────────────────── */
.blog-article pre {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 6px;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.6;
  margin: 1.25rem 0 1.75rem;
}
.blog-article code {
  font-family: 'Fira Mono', 'Consolas', monospace;
  font-size: 0.88em;
  background: rgba(255,255,255,0.06);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}
.blog-article pre code {
  background: none;
  padding: 0;
  font-size: 1em;
}