/* ── Blog Styles ─────────────────────── */

/* ── Back Link ───────────────────────── */

.blog-back {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1000;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(6, 182, 212, 0.2);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: var(--transition);
}

.blog-back:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  transform: translateX(-3px);
}

/* ── Mountain Background ─────────────── */

.page-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.blog-list-page,
.blog-post-page {
  position: relative;
  z-index: 2;
  flex: 1;
}

.blog-list-page .mountain-canvas,
.blog-post-page .mountain-canvas {
  top: 0;
}

/* ── Blog List Page ──────────────────── */

.blog-list-header {
  text-align: center;
  padding: 3rem 2rem 1.5rem;
  max-width: 800px;
  margin: 0 auto;
}

.blog-list-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  background: linear-gradient(135deg, #fff 30%, var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.blog-list-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
  font-weight: 300;
}

.blog-filter-row {
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 1rem auto 1.5rem;
}

.blog-tag-filter {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.blog-clear-filter {
  color: var(--accent-hot);
  text-decoration: none;
  margin-left: 0.5rem;
  font-weight: 500;
}

.blog-clear-filter:hover { text-decoration: underline; }

.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem 4rem;
}

.blog-card-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.blog-card {
  background: rgba(18, 6, 28, 0.7);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(167, 139, 250, 0.15);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}

.blog-card:hover {
  transform: rotate(-0.5deg);
  border-color: var(--primary-vivid);
  box-shadow: 0 12px 40px rgba(139, 92, 246, 0.12);
}

.blog-card-accent {
  position: absolute;
  top: 0;
  right: 0;
  width: 160px;
  height: 160px;
  background: linear-gradient(225deg, rgba(139, 92, 246, 0.1), transparent);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
  pointer-events: none;
}

.blog-card-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.blog-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.blog-card:hover .blog-card-image img {
  transform: scale(1.05);
}

.blog-card-body { padding: 1.5rem; }

.blog-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--text-light) 50%, var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.4;
}

.blog-card-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.blog-card-excerpt {
  font-size: 0.95rem;
  color: #9ca3af;
  line-height: 1.6;
  margin-bottom: 0.75rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-tags { display: flex; gap: 0.5rem; flex-wrap: wrap; }

.blog-tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  background: rgba(139, 92, 246, 0.15);
  color: var(--primary-light);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.blog-tag:hover {
  background: rgba(139, 92, 246, 0.3);
}

.blog-empty {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--text-muted);
  font-size: 1.1rem;
  padding: 4rem 2rem;
}

/* ── Blog Post Page ──────────────────── */

.blog-post-page {
  max-width: 100%;
}

.blog-post-hero {
  max-width: 900px;
  margin: 0 auto 2rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
}

.blog-post-hero img {
  width: 100%;
  display: block;
}

.blog-article {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem;
}

.blog-post-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.blog-post-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, #fff 40%, var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.blog-post-meta {
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.blog-post-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.75rem;
}

.blog-series {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.2);
  color: var(--accent-cyan);
  font-size: 0.9rem;
}

/* ── Blog Content (prose) ────────────── */

.blog-content {
  line-height: 1.8;
  font-size: 1.05rem;
  color: #d1d5db;
}

.blog-content h2,
.blog-content h3,
.blog-content h4 {
  font-weight: 700;
  line-height: 1.3;
  margin: 2.5rem 0 1rem;
  background: linear-gradient(135deg, var(--text-light) 50%, var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.blog-content h2 { font-size: 1.65rem; }
.blog-content h3 { font-size: 1.35rem; }
.blog-content h4 { font-size: 1.15rem; }

.blog-content p {
  margin-bottom: 1.25rem;
}

.blog-content a {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-decoration-color: rgba(6, 182, 212, 0.3);
  text-underline-offset: 3px;
  transition: var(--transition);
}

.blog-content a:hover {
  text-decoration-color: var(--accent-cyan);
}

.blog-content strong {
  color: var(--text-light);
  font-weight: 600;
}

.blog-content em {
  color: #e5e7eb;
}

.blog-content code {
  font-size: 0.88em;
  background: rgba(139, 92, 246, 0.16);
  color: #d4bcfa;
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  font-family: 'Ubuntu Mono', 'Fira Code', monospace;
}

.blog-content pre code {
  background: none;
  color: inherit;
  padding: 0;
  font-size: 0.9rem;
}

.blog-content blockquote {
  padding: 1.1rem 1.35rem;
  margin: 1.5rem 0;
  background: linear-gradient(135deg, rgba(244, 63, 94, 0.14) 0%, rgba(180, 40, 90, 0.06) 100%);
  border-radius: var(--radius-md);
  border: 1px solid rgba(244, 63, 94, 0.22);
  box-shadow: 0 4px 16px rgba(244, 63, 94, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.03);
  color: #ddd;
  font-style: italic;
}

.blog-content blockquote cite {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: normal;
}

.blog-content hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 2.5rem 0;
}

.blog-content ul,
.blog-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.blog-content li {
  margin-bottom: 0.4rem;
}

.blog-content del {
  color: var(--text-muted);
}

/* ── Code Blocks ─────────────────────── */

.blog-code-block {
  margin: 1.5rem 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(139, 92, 246, 0.22);
  box-shadow: 0 4px 16px rgba(139, 92, 246, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.03);
  background: linear-gradient(160deg, #1e1b2e 0%, #1a1b26 100%);
}

.blog-code-filename {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  font-family: 'Ubuntu Mono', 'Fira Code', monospace;
  background: rgba(139, 92, 246, 0.15);
  color: var(--primary-light);
  border-bottom: 1px solid rgba(139, 92, 246, 0.12);
}

.blog-code-block pre {
  margin: 0;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  background: transparent;
}

.blog-code-block code.hljs {
  background: transparent;
  padding: 0;
  font-family: 'Ubuntu Mono', 'Fira Code', monospace;
  font-size: 0.9rem;
  line-height: 1.6;
}

.blog-caption {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  font-style: italic;
}

/* ── Figures & Images ────────────────── */

.blog-figure {
  margin: 2rem 0;
  text-align: center;
}

.blog-figure img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.blog-figure figcaption {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
}

.blog-svg svg {
  max-width: 100%;
  height: auto;
}

/* ── Video Embeds ────────────────────── */

.blog-video-wrap {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

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

/* ── Tables ──────────────────────────── */

.blog-table-wrap {
  margin: 1.5rem 0;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.blog-table-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.blog-table-wrap th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-light);
  background: rgba(139, 92, 246, 0.1);
  border-bottom: 1px solid var(--border);
}

.blog-table-wrap td {
  padding: 0.6rem 1rem;
  border-bottom: 1px solid rgba(139, 92, 246, 0.08);
  color: #d1d5db;
}

.blog-table-wrap tbody tr:hover {
  background: rgba(139, 92, 246, 0.05);
}

/* ── Math ────────────────────────────── */

.blog-math-display {
  margin: 1.5rem 0;
  overflow-x: auto;
  text-align: center;
  padding: 1rem 0;
}

.blog-math-inline {
  display: inline;
}

/* ── Callouts ────────────────────────── */

.blog-callout {
  margin: 1.5rem 0;
  padding: 1.1rem 1.35rem;
  border-radius: var(--radius-md);
}

.blog-callout-info {
  border: 1px solid rgba(59, 130, 246, 0.25);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(30, 60, 140, 0.06) 100%);
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.blog-callout-warning {
  border: 1px solid rgba(249, 115, 22, 0.25);
  background: linear-gradient(135deg, rgba(249, 115, 22, 0.15) 0%, rgba(140, 60, 10, 0.06) 100%);
  box-shadow: 0 4px 16px rgba(249, 115, 22, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.blog-callout-tip {
  border: 1px solid rgba(16, 185, 129, 0.25);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(10, 100, 70, 0.06) 100%);
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.blog-callout-danger {
  border: 1px solid rgba(244, 63, 94, 0.25);
  background: linear-gradient(135deg, rgba(244, 63, 94, 0.15) 0%, rgba(140, 30, 50, 0.06) 100%);
  box-shadow: 0 4px 16px rgba(244, 63, 94, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.blog-callout-note {
  border: 1px solid rgba(139, 92, 246, 0.25);
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.15) 0%, rgba(70, 40, 140, 0.06) 100%);
  box-shadow: 0 4px 16px rgba(139, 92, 246, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.blog-callout-title {
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--text-light);
  font-size: 0.95rem;
}

.blog-callout-body {
  font-size: 0.95rem;
  color: #ddd;
  line-height: 1.6;
}

/* ── Details/Accordion ───────────────── */

.blog-details {
  margin: 1.5rem 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.blog-details summary {
  padding: 0.75rem 1rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-light);
  background: rgba(139, 92, 246, 0.06);
  transition: var(--transition);
}

.blog-details summary:hover {
  background: rgba(139, 92, 246, 0.12);
}

.blog-details-body {
  padding: 1rem 1.25rem;
  color: #d1d5db;
  line-height: 1.6;
}

/* ── Table of Contents ───────────────── */

.blog-toc {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  border: 1px solid rgba(103, 232, 249, 0.15);
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(103, 232, 249, 0.08) 0%, rgba(30, 30, 46, 0.6) 100%);
  box-shadow: 0 4px 16px rgba(103, 232, 249, 0.06), inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.blog-toc-title {
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.blog-toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.blog-toc li {
  padding: 0.05rem 0;
}

.blog-toc a {
  color: var(--accent-cyan);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.blog-toc a:hover {
  color: var(--text-light);
}

/* ── Comments ────────────────────────── */

.blog-comments {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem;
  border-top: 1px solid var(--border);
}

.blog-comments-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text-light);
}

.blog-no-comments {
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 2rem;
}

.blog-comment-card {
  padding: 1.25rem;
  margin-bottom: 1rem;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.blog-comment-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.blog-comment-meta strong {
  color: var(--text-light);
}

.blog-comment-body {
  font-size: 0.95rem;
  color: #d1d5db;
  line-height: 1.6;
}

.blog-comment-body p {
  margin-bottom: 0.5rem;
}

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

/* ── Comment Form ────────────────────── */

.blog-comment-form {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.blog-comment-form h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--text-light);
}

.blog-form-group {
  margin-bottom: 1rem;
}

.blog-form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.blog-form-group input,
.blog-form-group textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: rgba(10, 10, 15, 0.6);
  color: var(--text-light);
  font-family: "Ubuntu", sans-serif;
  font-size: 0.95rem;
  transition: var(--transition);
}

.blog-form-group input:focus,
.blog-form-group textarea:focus {
  outline: none;
  border-color: var(--primary-vivid);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

.blog-form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.blog-submit-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  font-family: "Ubuntu", sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-hot), var(--primary));
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
}

.blog-submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(244, 63, 94, 0.3);
}

/* ── Footer ──────────────────────────── */

.blog-footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
}

.blog-footer-inner {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.blog-footer a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

.blog-footer a:hover {
  color: var(--accent-cyan);
}

.blog-footer-sep {
  opacity: 0.4;
}

/* ── Mobile Responsive ───────────────── */

@media (max-width: 968px) {
  .blog-grid {
    grid-template-columns: 1fr;
    padding: 0 1rem 3rem;
    gap: 1.25rem;
  }

  .blog-list-page .mountain-canvas,
  .blog-post-page .mountain-canvas {
    min-height: 35vh;
  }

  .blog-list-header {
    padding: 3.5rem 1rem 1rem;
  }

  .blog-article {
    padding: 1.5rem 1rem;
  }

  .blog-post-hero {
    border-radius: 0;
    margin: 0 0 1.5rem;
  }

  .blog-content {
    font-size: 1rem;
  }

  .blog-content h2 { font-size: 1.4rem; }
  .blog-content h3 { font-size: 1.2rem; }

  .blog-code-block {
    margin-left: -1rem;
    margin-right: -1rem;
    border-radius: 0;
  }

  .blog-code-block pre {
    padding: 0.85rem 1rem;
  }

  .blog-code-block code.hljs {
    font-size: 0.82rem;
  }

  .blog-table-wrap {
    margin-left: -1rem;
    margin-right: -1rem;
    border-radius: 0;
    font-size: 0.85rem;
  }

  .blog-video-wrap {
    margin: 0 -1rem;
    border-radius: 0;
  }

  .blog-comments {
    padding: 1.5rem 1rem;
  }

  .blog-comment-form {
    padding: 1rem;
  }
}