/* ============================================================
   blog.css — shared styles for blog index + all post pages
   ============================================================ */

/* ── POST COVER ICONS ── */
.post-icon-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.post-icon-wrap svg {
  stroke: var(--orange, #ff6b2b);
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 0 16px rgba(255, 107, 43, 0.4));
}
.post-icon-wrap::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(255, 107, 43, 0.15),
    transparent 70%
  );
  z-index: 0;
}

/* ── READING PROGRESS BAR ── */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 500;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--orange, #ff6b2b), #ff8c55);
  transition: width 0.08s linear;
  box-shadow: 0 0 10px rgba(255, 107, 43, 0.55);
}

/* ── ARTICLE HERO ── */
.article-hero {
  padding: calc(var(--nav-h, 60px) + 48px) 0 0;
}
.article-hero-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 32px;
  text-align: center;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted, #9d9a96);
  text-decoration: none;
  margin-bottom: 28px;
  transition: color 0.25s;
}
.back-link:hover {
  color: var(--orange, #ff6b2b);
}
.back-link svg {
  width: 15px;
  height: 15px;
  stroke: currentColor;
  fill: none;
}
.article-tags {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.article-tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--orange, #ff6b2b);
  background: var(--orange-pale, rgba(255, 107, 43, 0.07));
  border: 1px solid rgba(255, 107, 43, 0.2);
  padding: 5px 12px;
  border-radius: 4px;
}
.article-title {
  font-size: clamp(26px, 5vw, 46px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.article-subtitle {
  font-size: 17px;
  line-height: 1.75;
  color: var(--light-muted, rgba(240, 237, 232, 0.55));
  margin-bottom: 28px;
  font-weight: 400;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border, rgba(255, 255, 255, 0.07));
}
.meta-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--muted, #9d9a96);
  font-weight: 500;
}
.meta-chip svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
}
.meta-chip.accent {
  color: var(--orange, #ff6b2b);
}

/* ── ARTICLE COVER ── */
.article-cover {
  max-width: 900px;
  margin: 0 auto;
  height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.article-cover svg {
  width: 130px;
  height: 130px;
  stroke: var(--orange, #ff6b2b);
  fill: none;
  stroke-width: 1.2;
  stroke-linecap: round;
  stroke-linejoin: round;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 0 28px rgba(255, 107, 43, 0.45));
}
.article-cover::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(255, 107, 43, 0.18),
    transparent 70%
  );
}

/* ── ARTICLE LAYOUT ── */
.article-layout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 32px 80px;
  display: grid;
  grid-template-columns: 1fr 230px;
  gap: 56px;
  align-items: start;
}

/* ── ARTICLE BODY ── */
.article-body {
  min-width: 0;
}
.article-content {
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--light-muted, rgba(240, 237, 232, 0.55));
}
.article-content h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--text, #f0ede8);
  margin: 44px 0 14px;
  letter-spacing: -0.01em;
  padding-top: 8px;
}
.article-content h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--text, #f0ede8);
  margin: 30px 0 10px;
}
.article-content p {
  margin-bottom: 18px;
}
.article-content strong {
  color: var(--text, #f0ede8);
  font-weight: 700;
}
.article-content em {
  color: #ff8c55;
  font-style: italic;
}
.article-content a {
  color: var(--orange, #ff6b2b);
  text-underline-offset: 3px;
}
.article-content ul,
.article-content ol {
  margin: 0 0 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.article-content li {
  color: var(--light-muted, rgba(240, 237, 232, 0.55));
}
.article-content pre {
  background: var(--dark2, #161618);
  border: 1px solid var(--border, rgba(255, 255, 255, 0.07));
  border-left: 3px solid var(--orange, #ff6b2b);
  border-radius: 12px;
  padding: 20px 22px;
  overflow-x: auto;
  margin: 24px 0;
  font-family: "Courier New", monospace;
  font-size: 13.5px;
  line-height: 1.75;
  color: #e8e4df;
}
.article-content code {
  font-family: "Courier New", monospace;
  font-size: 13.5px;
  color: #ff8c55;
  background: var(--dark3, #1e1e22);
  padding: 2px 7px;
  border-radius: 4px;
}
.article-content pre code {
  background: none;
  padding: 0;
  color: #e8e4df;
}
.callout {
  background: var(--orange-pale, rgba(255, 107, 43, 0.07));
  border: 1px solid rgba(255, 107, 43, 0.2);
  border-left: 3px solid var(--orange, #ff6b2b);
  border-radius: 0 10px 10px 0;
  padding: 16px 20px;
  margin: 26px 0;
  font-size: 14.5px;
  color: var(--text, #f0ede8);
  line-height: 1.7;
}
.callout strong {
  color: var(--orange, #ff6b2b);
}
.article-divider {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 40px 0;
  color: var(--muted, #9d9a96);
}
.article-divider::before,
.article-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border, rgba(255, 255, 255, 0.07));
}
.article-divider svg {
  width: 18px;
  height: 18px;
  stroke: var(--orange, #ff6b2b);
  fill: none;
}

/* ── AUTHOR CARD ── */
.author-card {
  background: var(--dark2, #161618);
  border: 1px solid var(--border, rgba(255, 255, 255, 0.07));
  border-radius: 18px;
  padding: 26px 28px;
  display: flex;
  align-items: center;
  gap: 22px;
  margin-top: 48px;
}
.author-avatar {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  border: 2px solid var(--orange, #ff6b2b);
  flex-shrink: 0;
  background: var(--dark3, #1e1e22);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.author-avatar svg {
  width: 32px;
  height: 32px;
  stroke: var(--muted, #9d9a96);
  fill: none;
}
.author-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: none;
}
.author-name {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 3px;
}
.author-role {
  font-size: 13px;
  color: var(--orange, #ff6b2b);
  font-weight: 600;
  margin-bottom: 7px;
}
.author-bio {
  font-size: 13.5px;
  color: var(--muted, #9d9a96);
  line-height: 1.65;
}

/* ── RELATED POSTS ── */
.related-section {
  margin-top: 44px;
}
.related-title {
  font-size: 19px;
  font-weight: 800;
  margin-bottom: 18px;
}
.related-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.related-card {
  background: var(--dark2, #161618);
  border: 1px solid var(--border, rgba(255, 255, 255, 0.07));
  border-radius: 12px;
  overflow: hidden;
  text-decoration: none;
  color: var(--text, #f0ede8);
  display: flex;
  gap: 14px;
  padding: 14px;
  transition:
    border-color 0.25s,
    transform 0.25s;
}
.related-card:hover {
  border-color: rgba(255, 107, 43, 0.3);
  transform: translateY(-3px);
}
.related-icon {
  width: 50px;
  height: 50px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.related-icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--orange, #ff6b2b);
  fill: none;
  stroke-width: 1.5;
}
.related-tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--orange, #ff6b2b);
  margin-bottom: 3px;
  display: block;
}
.related-card-title {
  font-size: 13px;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 3px;
}
.related-read-time {
  font-size: 11px;
  color: var(--muted, #9d9a96);
}

/* ── TOC SIDEBAR ── */
.toc-wrap {
  position: sticky;
  top: calc(var(--nav-h, 60px) + 20px);
}
.toc-card {
  background: var(--dark2, #161618);
  border: 1px solid var(--border, rgba(255, 255, 255, 0.07));
  border-radius: 14px;
  padding: 18px;
  margin-bottom: 16px;
}
.toc-label {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted, #9d9a96);
  margin-bottom: 12px;
}
.toc-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.toc-link {
  font-size: 12.5px;
  color: var(--muted, #9d9a96);
  font-weight: 500;
  padding: 7px 10px;
  border-radius: 7px;
  text-decoration: none;
  display: block;
  line-height: 1.4;
  transition: all 0.2s;
}
.toc-link:hover {
  background: var(--orange-pale, rgba(255, 107, 43, 0.07));
  color: var(--orange, #ff6b2b);
}
.toc-link.active {
  background: var(--orange-pale, rgba(255, 107, 43, 0.07));
  color: var(--orange, #ff6b2b);
  font-weight: 700;
}
.share-card {
  background: var(--dark2, #161618);
  border: 1px solid var(--border, rgba(255, 255, 255, 0.07));
  border-radius: 14px;
  padding: 18px;
  text-align: center;
}
.share-label {
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 11px;
  color: var(--text, #f0ede8);
}
.share-row {
  display: flex;
  gap: 8px;
}
.share-btn {
  flex: 1;
  padding: 9px 6px;
  border-radius: 8px;
  border: 1px solid var(--border, rgba(255, 255, 255, 0.07));
  background: var(--dark3, #1e1e22);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--muted, #9d9a96);
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}
.share-btn:hover {
  border-color: var(--orange, #ff6b2b);
  color: var(--orange, #ff6b2b);
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .article-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .toc-wrap {
    display: none;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 560px) {
  .article-cover {
    height: 220px;
  }
  .article-cover svg {
    width: 90px;
    height: 90px;
  }
  .article-hero-inner,
  .article-layout {
    padding-left: 20px;
    padding-right: 20px;
  }
  .author-card {
    flex-direction: column;
    text-align: center;
  }
}