/* Ultra Lab Blog — Dark theme, matching landing page aesthetic */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0A0515;
  --bg-card: rgba(15, 10, 30, 0.8);
  --border: rgba(138, 92, 255, 0.15);
  --purple: #8A5CFF;
  --purple-mid: #CE4DFF;
  --text: #E2E8F0;
  --text-muted: #94A3B8;
  --text-dim: #64748B;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Outfit', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(138, 92, 255, 0.3); color: #fff; }

/* ===== Nav ===== */
.blog-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 5, 21, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.blog-nav-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.blog-nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.1rem;
  background: linear-gradient(135deg, #8A5CFF, #CE4DFF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.blog-nav-links {
  display: flex;
  gap: 24px;
}

.blog-nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.blog-nav-links a:hover,
.blog-nav-links a.active {
  color: #fff;
}

.blog-lang-switch {
  padding: 3px 10px;
  border: 1px solid rgba(138, 92, 255, 0.4);
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: #CE4DFF !important;
  transition: all 0.2s;
}
.blog-lang-switch:hover {
  background: rgba(138, 92, 255, 0.15);
  border-color: rgba(138, 92, 255, 0.7);
  color: #fff !important;
}

/* ===== Main ===== */
.blog-main {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

/* ===== Blog Index ===== */
.blog-index-header {
  text-align: center;
  padding: 40px 0 48px;
}

.blog-index-header h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin: 16px 0 8px;
}

.blog-index-header p {
  color: var(--text-muted);
  font-size: 1.1rem;
}

.terminal-tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--purple);
  background: rgba(138, 92, 255, 0.08);
  border: 1px solid rgba(138, 92, 255, 0.2);
}

.blog-grid {
  display: grid;
  gap: 20px;
}

.blog-card {
  display: block;
  text-decoration: none;
  color: inherit;
  padding: 28px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: all 0.3s ease;
}

.blog-card:hover {
  border-color: rgba(138, 92, 255, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(138, 92, 255, 0.1);
}

.blog-card h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 12px 0 8px;
  line-height: 1.4;
}

.blog-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.blog-card-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.blog-card-meta {
  margin-top: 16px;
  font-size: 0.8rem;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
}

.blog-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--purple);
  background: rgba(138, 92, 255, 0.1);
  border: 1px solid rgba(138, 92, 255, 0.2);
}

.blog-tag-cat {
  color: #F59E0B;
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.25);
}

.blog-dot { margin: 0 6px; }

/* ===== Category Filter ===== */
.blog-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
  justify-content: center;
}

.blog-filter-btn {
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.25s;
}

.blog-filter-btn:hover {
  border-color: var(--purple);
  color: var(--purple);
}

.blog-filter-btn.active {
  background: var(--purple);
  border-color: var(--purple);
  color: #fff;
}

/* ===== Article ===== */
.blog-header {
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
}

.blog-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.3;
  margin: 16px 0 12px;
}

.blog-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 4px; }

.blog-info {
  font-size: 0.85rem;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
}

/* ===== Reading Progress Bar ===== */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, #8A5CFF, #CE4DFF);
  z-index: 100;
  transition: width 0.1s linear;
}

/* ===== Table of Contents ===== */
.blog-toc {
  margin: 0 0 40px;
  padding: 20px 24px;
  border-left: 3px solid var(--purple);
  border-radius: 0 12px 12px 0;
  background: rgba(138, 92, 255, 0.04);
}

.toc-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--purple);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.blog-toc ol {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: toc;
}

.blog-toc li {
  counter-increment: toc;
  margin-bottom: 6px;
}

.blog-toc li::before {
  content: counter(toc) ".";
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  margin-right: 8px;
}

.blog-toc li.toc-sub {
  padding-left: 24px;
  font-size: 0.9em;
}

.blog-toc li.toc-sub::before {
  content: "—";
}

.blog-toc a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

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

/* ===== Heading Anchor Links ===== */
.heading-anchor {
  color: var(--purple);
  text-decoration: none;
  opacity: 0;
  font-weight: 400;
  margin-right: 8px;
  transition: opacity 0.2s;
}

.blog-content h2:hover .heading-anchor,
.blog-content h3:hover .heading-anchor {
  opacity: 0.6;
}

.heading-anchor:hover {
  opacity: 1 !important;
}

/* ===== Article Content ===== */
.blog-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text);
}

.blog-content h2 {
  font-size: 1.6rem;
  font-weight: 800;
  margin: 48px 0 16px;
  color: #fff;
}

.blog-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 36px 0 12px;
  color: #fff;
}

.blog-content p {
  margin: 0 0 20px;
  color: #CBD5E1;
}

.blog-content ul, .blog-content ol {
  margin: 0 0 20px;
  padding-left: 24px;
  color: #CBD5E1;
}

.blog-content li { margin-bottom: 8px; }

.blog-content strong { color: #fff; font-weight: 600; }

.blog-content a {
  color: var(--purple);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s;
}

.blog-content a:hover { color: var(--purple-mid); }

.blog-content code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9em;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(138, 92, 255, 0.1);
  color: var(--purple-mid);
}

.blog-content pre {
  margin: 0 0 24px;
  padding: 20px;
  border-radius: 12px;
  background: rgba(15, 10, 30, 0.9);
  border: 1px solid var(--border);
  overflow-x: auto;
}

.blog-content pre code {
  padding: 0;
  background: none;
  color: var(--text);
  font-size: 0.85rem;
  line-height: 1.6;
}

.blog-content blockquote {
  margin: 0 0 24px;
  padding: 16px 24px;
  border-left: 3px solid var(--purple);
  background: rgba(138, 92, 255, 0.05);
  border-radius: 0 12px 12px 0;
  color: var(--text-muted);
}

.blog-content hr {
  border: none;
  height: 1px;
  background: var(--border);
  margin: 40px 0;
}

.blog-content img {
  max-width: 100%;
  border-radius: 12px;
  margin: 24px 0;
}

/* ===== Prev/Next Navigation ===== */
.blog-prev-next {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.prev-next-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-decoration: none;
  padding: 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  max-width: 48%;
  transition: all 0.3s;
}

.prev-next-link:hover {
  border-color: rgba(138, 92, 255, 0.4);
  transform: translateY(-2px);
}

.next-link { text-align: right; margin-left: auto; }

.prev-next-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--purple);
}

.prev-next-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}

/* ===== Related Posts ===== */
.blog-related {
  margin-top: 48px;
}

.blog-related > h2 {
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 20px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.related-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  padding: 20px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: all 0.3s;
}

.related-card:hover {
  border-color: rgba(138, 92, 255, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(138, 92, 255, 0.1);
}

.related-card-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.related-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.4;
  margin-bottom: 8px;
}

.related-card-meta {
  margin-top: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-dim);
}

@media (max-width: 640px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
  .blog-prev-next {
    flex-direction: column;
  }
  .prev-next-link {
    max-width: 100%;
  }
  .next-link { text-align: left; }
}

/* ===== CTA ===== */
.blog-cta {
  margin-top: 60px;
  padding: 40px;
  border-radius: 16px;
  text-align: center;
  border: 1px solid var(--border);
  background: radial-gradient(ellipse at center, rgba(138, 92, 255, 0.08) 0%, transparent 70%);
}

.blog-cta h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}

.blog-cta p {
  color: var(--text-muted);
  margin-bottom: 20px;
}

.blog-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
  text-decoration: none;
  background: linear-gradient(135deg, #8A5CFF, #CE4DFF);
  box-shadow: 0 0 30px rgba(138, 92, 255, 0.4);
  transition: all 0.3s;
}

.blog-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 50px rgba(138, 92, 255, 0.6);
}

.blog-cta-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.blog-cta-btn-discord {
  background: transparent;
  border: 1px solid rgba(138, 92, 255, 0.4);
  color: var(--purple);
  box-shadow: none;
}

.blog-cta-btn-discord:hover {
  background: rgba(138, 92, 255, 0.1);
  border-color: var(--purple);
  box-shadow: 0 0 30px rgba(138, 92, 255, 0.3);
}

/* Subscribe Form */
.blog-subscribe {
  text-align: center;
  padding: 48px 32px;
  margin: 48px 0 0;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(138, 92, 255, 0.08), rgba(206, 77, 255, 0.05));
  border: 1px solid rgba(138, 92, 255, 0.2);
}

.blog-subscribe h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: #F8FAFC;
  margin-bottom: 8px;
}

.blog-subscribe > p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.subscribe-form {
  display: flex;
  gap: 8px;
  max-width: 420px;
  margin: 0 auto;
}

.subscribe-form input {
  flex: 1;
  padding: 12px 16px;
  border-radius: 10px;
  border: 1px solid rgba(138, 92, 255, 0.25);
  background: rgba(10, 5, 21, 0.8);
  color: #F8FAFC;
  font-size: 0.9rem;
  font-family: 'JetBrains Mono', monospace;
  outline: none;
  transition: border-color 0.3s;
}

.subscribe-form input:focus {
  border-color: var(--purple);
  box-shadow: 0 0 20px rgba(138, 92, 255, 0.15);
}

.subscribe-form input::placeholder {
  color: #475569;
}

.subscribe-form button {
  padding: 12px 24px;
  border-radius: 10px;
  border: none;
  background: linear-gradient(135deg, #8A5CFF, #CE4DFF);
  color: white;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.3s;
}

.subscribe-form button:hover {
  box-shadow: 0 0 30px rgba(138, 92, 255, 0.4);
  transform: translateY(-1px);
}

.subscribe-form button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.subscribe-status {
  margin-top: 12px;
  font-size: 0.85rem;
}

.subscribe-status.success { color: #10B981; }
.subscribe-status.error { color: #F87171; }

@media (max-width: 480px) {
  .subscribe-form {
    flex-direction: column;
  }
  .subscribe-form button {
    width: 100%;
  }
}

/* ===== Footer ===== */
.blog-footer {
  max-width: 800px;
  margin: 0 auto;
  padding: 24px 20px;
  border-top: 1px solid rgba(138, 92, 255, 0.06);
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ===== Copyright Footer ===== */
.blog-article-footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid rgba(138, 92, 255, 0.08);
}

.blog-copyright {
  padding: 20px 24px;
  border-radius: 12px;
  background: rgba(138, 92, 255, 0.04);
  border: 1px solid rgba(138, 92, 255, 0.08);
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--text-dim);
}

.blog-copyright p {
  margin: 0 0 6px;
}

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

.blog-copyright-source {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  margin-top: 8px !important;
  word-break: break-all;
}

.blog-copyright-source a {
  color: var(--accent);
  text-decoration: none;
}

.blog-copyright-source a:hover {
  text-decoration: underline;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .blog-header h1 { font-size: 1.7rem; }
  .blog-index-header h1 { font-size: 2rem; }
  .blog-content { font-size: 1rem; }
  .blog-content h2 { font-size: 1.35rem; }
  .blog-cta { padding: 28px 20px; }
}