/**
 * 2LZ Blog — Styling
 * Depends on: variables.css, base.css, components.css
 * v2
 */

/* ===========================
   Reading Progress Bar
   =========================== */

.blog-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--color-primary);
  z-index: 200;
  transition: width 50ms linear;
}

/* ===========================
   Blog Listing — Hero
   =========================== */

.blog-hero {
  padding: 7rem 0 3rem;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #264a7a 100%);
  text-align: center;
}

.blog-hero h1 {
  color: #fff;
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.blog-hero p {
  color: #cbd5e1;
  font-size: 1.125rem;
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

@media (min-width: 1024px) {
  .blog-hero h1 {
    font-size: 3rem;
  }
}

/* ===========================
   Blog Listing — Grid
   =========================== */

.blog-listing {
  padding: 3rem 0 5rem;
}

.blog-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 768px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ===========================
   Blog Card
   =========================== */

.blog-card {
  background: #fff;
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
}

.blog-card a {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.blog-card-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--color-slate-100);
}

.blog-card-image-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-primary-100) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.blog-card-image-placeholder svg {
  width: 48px;
  height: 48px;
  color: var(--color-primary);
  opacity: 0.4;
}

.blog-card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  font-size: 0.8125rem;
  color: var(--color-slate-500);
}

.blog-card-category {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem 0.5rem;
  background: var(--color-primary-50);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.blog-card-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-slate-400);
}

.blog-card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-slate-900);
  line-height: 1.4;
  margin-bottom: 0.5rem;
  transition: color var(--transition-fast);
}

.blog-card:hover .blog-card-title {
  color: var(--color-primary);
}

.blog-card-excerpt {
  font-size: 0.9375rem;
  color: var(--color-slate-600);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-footer {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
}

.blog-card-footer svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.blog-card:hover .blog-card-footer svg {
  transform: translateX(4px);
}

/* ===========================
   Blog Listing — Empty State
   =========================== */

.blog-empty {
  text-align: center;
  padding: 4rem 0;
  color: var(--color-slate-500);
}

.blog-empty p {
  font-size: 1.125rem;
}

/* ===========================
   Article — Header
   =========================== */

.blog-article-hero {
  padding: 7rem 0 2rem;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #264a7a 100%);
}

.blog-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
}

.blog-breadcrumb a {
  color: #94a3b8;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.blog-breadcrumb a:hover {
  color: #fff;
}

.blog-breadcrumb span {
  color: #64748b;
}

.blog-breadcrumb-current {
  color: #cbd5e1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 300px;
}

.blog-article-title {
  color: #fff;
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
  max-width: 800px;
}

@media (min-width: 768px) {
  .blog-article-title {
    font-size: 2.5rem;
  }
}

@media (min-width: 1024px) {
  .blog-article-title {
    font-size: 2.75rem;
  }
}

.blog-article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  font-size: 0.875rem;
  color: #94a3b8;
}

.blog-article-meta-item {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.blog-article-meta-item svg {
  width: 16px;
  height: 16px;
}

.blog-article-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  color: #cbd5e1;
}

/* ===========================
   Article — Layout
   =========================== */

.blog-article-section {
  padding: 3rem 0 5rem;
}

.blog-layout {
  display: grid;
  gap: 2rem;
}

@media (min-width: 1024px) {
  .blog-layout {
    grid-template-columns: 1fr 280px;
    gap: 3rem;
  }
}

/* ===========================
   Article — Prose (Long-form Typography)
   =========================== */

.blog-prose {
  max-width: 720px;
  line-height: 1.75;
  color: var(--color-slate-800);
  font-size: 1.0625rem;
}

.blog-prose > * + * {
  margin-top: 1rem;
}

.blog-prose h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-slate-900);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-slate-200);
  line-height: 1.3;
  scroll-margin-top: 100px;
}

.blog-prose h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-slate-900);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  line-height: 1.4;
  scroll-margin-top: 100px;
}

.blog-prose h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-slate-900);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  scroll-margin-top: 100px;
}

.blog-prose p {
  margin-bottom: 1rem;
  line-height: 1.75;
}

.blog-prose a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: var(--color-primary-100);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition-fast);
}

.blog-prose a:hover {
  text-decoration-color: var(--color-primary);
}

.blog-prose strong {
  font-weight: 600;
  color: var(--color-slate-900);
}

.blog-prose ul,
.blog-prose ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.blog-prose ul {
  list-style-type: disc;
}

.blog-prose ol {
  list-style-type: decimal;
}

.blog-prose li {
  margin-bottom: 0.5rem;
  line-height: 1.65;
}

.blog-prose li > ul,
.blog-prose li > ol {
  margin-top: 0.5rem;
  margin-bottom: 0;
}

.blog-prose blockquote {
  border-left: 3px solid var(--color-primary);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background: var(--color-slate-50);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-slate-700);
  font-style: italic;
}

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

.blog-prose code {
  font-family: 'Fira Code', 'Consolas', monospace;
  font-size: 0.875em;
  background: var(--color-slate-100);
  color: var(--color-slate-800);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
}

.blog-prose pre {
  background: var(--color-slate-900);
  color: #e2e8f0;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-lg);
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 0.875rem;
  line-height: 1.7;
}

.blog-prose pre code {
  background: none;
  color: inherit;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
}

.blog-prose img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin: 1.5rem 0;
}

.blog-prose hr {
  border: none;
  border-top: 1px solid var(--color-slate-200);
  margin: 2rem 0;
}

.blog-prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9375rem;
}

.blog-prose th,
.blog-prose td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-slate-200);
}

.blog-prose th {
  font-weight: 600;
  color: var(--color-slate-700);
  background: var(--color-slate-50);
}

.blog-prose tbody tr:hover {
  background: var(--color-slate-50);
}

/* FAQ-specific styling */
.blog-prose h4 + p {
  margin-top: 0.25rem;
}

/* ===========================
   Article — Sidebar
   =========================== */

.blog-sidebar {
  display: none;
}

@media (min-width: 1024px) {
  .blog-sidebar {
    display: block;
    position: sticky;
    top: 5rem;
    align-self: start;
    max-height: calc(100vh - 6rem);
    overflow-y: auto;
  }
}

/* Table of Contents */
.blog-toc {
  background: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-xl);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.blog-toc-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-slate-500);
  margin-bottom: 0.75rem;
}

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

.blog-toc-list li {
  margin-bottom: 0.25rem;
}

.blog-toc-link {
  display: block;
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
  color: var(--color-slate-600);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transition: all var(--transition-fast);
  line-height: 1.4;
}

.blog-toc-link:hover {
  color: var(--color-primary);
  background: var(--color-primary-50);
  border-left-color: var(--color-primary-100);
}

.blog-toc-link.active {
  color: var(--color-primary);
  font-weight: 600;
  border-left-color: var(--color-primary);
  background: var(--color-primary-50);
}

.blog-toc-link[data-level="3"] {
  padding-left: 1.5rem;
  font-size: 0.75rem;
}

/* Author Card */
.blog-author-card {
  background: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-xl);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.blog-author-avatar-img {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  object-fit: contain;
  margin: 0 auto 0.75rem;
  display: block;
}

.blog-author-name {
  font-weight: 600;
  color: var(--color-slate-900);
  font-size: 0.9375rem;
}

.blog-author-bio {
  font-size: 0.8125rem;
  color: var(--color-slate-500);
  line-height: 1.5;
  margin-top: 0.25rem;
}

/* Share & Copy */
.blog-share {
  background: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-xl);
  padding: 1.25rem;
}

.blog-share-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-slate-500);
  margin-bottom: 0.75rem;
}

.blog-share-buttons {
  display: flex;
  gap: 0.5rem;
}

.blog-share-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-slate-200);
  background: #fff;
  color: var(--color-slate-600);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.blog-share-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-50);
}

.blog-share-btn svg {
  width: 18px;
  height: 18px;
}

.blog-share-btn.copied {
  border-color: var(--color-success);
  color: var(--color-success);
  background: var(--color-success-light);
}

/* ===========================
   Article — CTA
   =========================== */

.blog-cta {
  margin-top: 3rem;
  padding: 2.5rem;
  background: linear-gradient(135deg, var(--color-primary-50) 0%, #fff 100%);
  border: 1px solid var(--color-primary-100);
  border-radius: var(--radius-xl);
  text-align: center;
}

.blog-cta h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-slate-900);
  margin-bottom: 0.5rem;
}

.blog-cta p {
  color: var(--color-slate-600);
  margin-bottom: 1.5rem;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.blog-cta .btn-block {
  display: block;
  width: 100%;
  padding: 1rem;
  font-size: 1.0625rem;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
}

/* ===========================
   Mobile TOC (visible below 1024px)
   =========================== */

.blog-toc-mobile {
  display: block;
  margin-bottom: 2rem;
}

@media (min-width: 1024px) {
  .blog-toc-mobile {
    display: none;
  }
}

.blog-toc-mobile-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-lg);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-slate-700);
}

.blog-toc-mobile-toggle svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.blog-toc-mobile-toggle.open svg {
  transform: rotate(180deg);
}

.blog-toc-mobile-content {
  display: none;
  padding: 0.75rem 1rem;
  background: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-top: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.blog-toc-mobile-content.open {
  display: block;
}

/* ===========================
   Back to Blog Link
   =========================== */

.blog-back {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-slate-500);
  text-decoration: none;
  transition: color var(--transition-fast);
  margin-bottom: 2rem;
}

.blog-back:hover {
  color: var(--color-primary);
}

.blog-back svg {
  width: 16px;
  height: 16px;
}

/* ===========================
   Dark Mode
   =========================== */

[data-theme="dark"] .blog-card {
  background: var(--color-slate-800);
  border-color: var(--color-slate-700);
}

[data-theme="dark"] .blog-card-title {
  color: var(--color-slate-100);
}

[data-theme="dark"] .blog-card-excerpt {
  color: var(--color-slate-400);
}

[data-theme="dark"] .blog-card-category {
  background: rgba(25, 50, 89, 0.15);
}

[data-theme="dark"] .blog-card-image-placeholder {
  background: linear-gradient(135deg, var(--color-slate-800) 0%, var(--color-slate-700) 100%);
}

[data-theme="dark"] .blog-prose {
  color: var(--color-slate-300);
}

[data-theme="dark"] .blog-prose h2,
[data-theme="dark"] .blog-prose h3,
[data-theme="dark"] .blog-prose h4,
[data-theme="dark"] .blog-prose strong {
  color: var(--color-slate-100);
}

[data-theme="dark"] .blog-prose h2 {
  border-bottom-color: var(--color-slate-700);
}

[data-theme="dark"] .blog-prose blockquote {
  background: var(--color-slate-800);
  color: var(--color-slate-300);
}

[data-theme="dark"] .blog-prose code {
  background: var(--color-slate-800);
  color: var(--color-slate-200);
}

[data-theme="dark"] .blog-prose th {
  background: var(--color-slate-800);
  color: var(--color-slate-300);
}

[data-theme="dark"] .blog-prose th,
[data-theme="dark"] .blog-prose td {
  border-color: var(--color-slate-700);
}

[data-theme="dark"] .blog-prose tbody tr:hover {
  background: var(--color-slate-800);
}

[data-theme="dark"] .blog-prose hr {
  border-color: var(--color-slate-700);
}

[data-theme="dark"] .blog-toc,
[data-theme="dark"] .blog-author-card,
[data-theme="dark"] .blog-share {
  background: var(--color-slate-800);
  border-color: var(--color-slate-700);
}

[data-theme="dark"] .blog-toc-link {
  color: var(--color-slate-400);
}

[data-theme="dark"] .blog-toc-link:hover,
[data-theme="dark"] .blog-toc-link.active {
  color: var(--color-primary-light);
  background: rgba(25, 50, 89, 0.1);
}

[data-theme="dark"] .blog-share-btn {
  background: var(--color-slate-800);
  border-color: var(--color-slate-600);
  color: var(--color-slate-400);
}


[data-theme="dark"] .blog-toc-mobile-toggle,
[data-theme="dark"] .blog-toc-mobile-content {
  background: var(--color-slate-800);
  border-color: var(--color-slate-700);
  color: var(--color-slate-300);
}

[data-theme="dark"] .blog-listing {
  background: var(--color-slate-900);
}

[data-theme="dark"] .blog-article-section {
  background: var(--color-slate-900);
}

[data-theme="dark"] .blog-cta {
  background: linear-gradient(135deg, rgba(25, 50, 89, 0.3) 0%, var(--color-slate-800) 100%);
  border-color: var(--color-slate-700);
}

[data-theme="dark"] .blog-cta h3 {
  color: var(--color-slate-100);
}

[data-theme="dark"] .blog-cta p {
  color: var(--color-slate-400);
}

[data-theme="dark"] .blog-cta .btn-primary {
  background: var(--color-white);
  color: var(--color-primary);
}

[data-theme="dark"] .blog-cta .btn-primary:hover {
  background: var(--color-slate-100);
}

/* ===========================
   Partner Card (announcement)
   =========================== */

.partner-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-xl, 12px);
  overflow: hidden;
  margin: 2.5rem 0;
  border: 1px solid var(--color-slate-200, #e2e8f0);
}

.partner-card-logo {
  background: #0a0a0a;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3.5rem 2rem;
}

.partner-card-logo img {
  width: 320px;
  max-width: 80%;
  height: auto;
  border-radius: 0;
  object-fit: contain;
  box-shadow: none;
  margin: 0;
}

.partner-card-body {
  background: var(--color-slate-50, #f8fafc);
  padding: 1.75rem;
}

.partner-card-body .partner-label {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-slate-500, #64748b);
  margin-bottom: 0.375rem;
}

.partner-card-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-slate-900, #0f172a);
  margin: 0 0 0.5rem 0;
  padding: 0;
  border: none;
}

.partner-card-body p {
  margin-bottom: 0;
  font-size: 0.9375rem;
  color: var(--color-slate-600, #475569);
  line-height: 1.65;
}

.partner-card-body a {
  color: var(--color-primary);
  font-weight: 600;
}

[data-theme="dark"] .partner-card {
  border-color: var(--color-slate-700);
}

[data-theme="dark"] .partner-card-body {
  background: var(--color-slate-800);
}

[data-theme="dark"] .partner-card-body h3 {
  color: var(--color-slate-100);
}

[data-theme="dark"] .partner-card-body p {
  color: var(--color-slate-400);
}