:root {
  color-scheme: light;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --color-bg: #f8fafc;
  --color-slate-50: #f8fafc;
  --color-slate-100: #e2e8f0;
  --color-slate-200: #cbd5f5;
  --color-slate-300: #cbd5f5;
  --color-slate-600: #475569;
  --color-slate-700: #334155;
  --color-slate-900: #0f172a;
  --color-blue-50: #eff6ff;
  --color-blue-500: #3b82f6;
  --color-blue-600: #2563eb;
  --color-indigo-500: #6366f1;
  --color-indigo-600: #4f46e5;
  --color-indigo-900: #1e1b4b;
  --color-overlay: rgba(15, 23, 42, 0.6);
  --gradient-primary: linear-gradient(135deg, #1e293b, #1d4ed8, #6366f1);
  --gradient-card: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(79, 70, 229, 0.08));
  --border-radius-lg: 24px;
  --border-radius-md: 16px;
  --border-radius-sm: 12px;
  --shadow-soft: 0 12px 40px rgba(15, 23, 42, 0.08);
  --shadow-strong: 0 24px 60px rgba(15, 23, 42, 0.18);
}

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

html,
body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-slate-700);
}

a {
  color: inherit;
  text-decoration: none;
}

.site-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: min(1100px, 92vw);
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(18px);
  background: rgba(248, 250, 252, 0.92);
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--color-blue-500), var(--color-indigo-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
}

.nav a {
  position: relative;
  color: var(--color-slate-600);
  transition: color 150ms ease, transform 200ms ease;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--color-blue-600);
  transform: translateY(-1px);
}

.nav .active {
  color: var(--color-blue-600);
}

.nav .cta {
  padding: 0.65rem 1.2rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--color-blue-500), var(--color-indigo-500));
  color: #fff;
  box-shadow: var(--shadow-soft);
}

.site-main {
  flex: 1;
}

.hero {
  position: relative;
  padding-block: clamp(4rem, 10vw, 8rem);
  background: var(--gradient-primary);
  color: #fff;
  overflow: hidden;
}

.hero::before,
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.4), transparent 60%);
  z-index: 0;
}

.hero::after {
  background: radial-gradient(circle at bottom left, rgba(79, 70, 229, 0.4), transparent 55%);
}

.hero > .container {
  position: relative;
  z-index: 1;
}

.hero-post {
  padding-block: clamp(3.5rem, 8vw, 6rem);
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.94), rgba(37, 99, 235, 0.85));
}

.hero-post.hero-post--has-image {
  position: relative;
  background: none;
  color: #fff;
  isolation: isolate;
}

.hero-post.hero-post--has-image::before,
.hero-post.hero-post--has-image::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -2;
  transition: opacity 300ms ease;
  border-radius: clamp(0px, 2vw, 32px);
}

.hero-post.hero-post--has-image::before {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-image: var(--hero-post-image);
  filter: brightness(0.8);
}

.hero-post.hero-post--has-image::after {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(37, 99, 235, 0.82));
  mix-blend-mode: multiply;
  z-index: -1;
}

.hero-post.hero-post--has-image > .container {
  position: relative;
  z-index: 1;
}

.hero-category {
  padding-block: clamp(3.5rem, 8vw, 5.5rem);
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.95), rgba(79, 70, 229, 0.75));
}

.eyebrow {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.32em;
  opacity: 0.7;
  font-weight: 600;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  margin: 0 0 1rem;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.lede {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  max-width: 640px;
  margin-bottom: 1.75rem;
  color: rgba(255, 255, 255, 0.88);
  line-height: 1.65;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.category-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-top: 1.5rem;
  color: rgba(255, 255, 255, 0.75);
}

.category-meta .pill {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  border-radius: 999px;
  padding: 0.85rem 1.6rem;
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.btn-primary {
  background: #fff;
  color: var(--color-blue-600);
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-strong);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.25);
}

.sidebar-card .btn {
  width: 100%;
  justify-content: center;
}

.sidebar-card .btn-primary {
  background: linear-gradient(135deg, var(--color-blue-500), var(--color-indigo-500));
  color: #fff;
  border: none;
  box-shadow: var(--shadow-soft);
}

.sidebar-card .btn-primary:hover,
.sidebar-card .btn-primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-strong);
  background: linear-gradient(135deg, var(--color-blue-600), var(--color-indigo-600));
}

.sidebar-card .btn-secondary {
  background: rgba(37, 99, 235, 0.12);
  color: var(--color-blue-600);
  border: 1px solid rgba(37, 99, 235, 0.35);
}

.sidebar-card .btn-secondary:hover,
.sidebar-card .btn-secondary:focus-visible {
  transform: translateY(-2px);
  background: rgba(37, 99, 235, 0.18);
}

.sidebar-card .btn + .btn {
  margin-top: 0.75rem;
}

.categories-section {
  padding-block: clamp(3rem, 7vw, 5rem);
}

.section-heading {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  text-align: left;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 2.5rem);
  color: var(--color-slate-900);
}

.section-heading p {
  margin: 0;
  font-size: 1.05rem;
  color: var(--color-slate-600);
  max-width: 640px;
}

.categories-grid {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.category-card {
  background: #fff;
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.16);
  padding: 2rem;
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 1rem;
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-strong);
}

.category-card h3 {
  margin: 0;
  font-size: 1.45rem;
  color: var(--color-slate-900);
}

.category-card p {
  margin: 0;
  color: var(--color-slate-600);
  line-height: 1.65;
}

.category-card__footer {
  margin-top: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.category-card__footer .pill {
  background: rgba(79, 70, 229, 0.12);
  color: var(--color-indigo-600);
}

.category-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-blue-600);
  font-weight: 600;
}

.category-link svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  stroke-width: 1.8;
  fill: none;
  transition: transform 200ms ease;
}

.category-card:hover .category-link svg {
  transform: translateX(4px);
}

.article-list {
  padding-block: clamp(3rem, 8vw, 6rem);
}

.article-list .grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.article-card {
  position: relative;
  background: #fff;
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.18);
  box-shadow: var(--shadow-soft);
  transition: transform 220ms ease, box-shadow 220ms ease;
  color: inherit;
  text-decoration: none;
  display: grid;
  overflow: hidden;
}

.article-card:hover,
.article-card:focus-visible {
  transform: translateY(-6px);
  box-shadow: var(--shadow-strong);
}

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

.card-image {
  position: relative;
  width: 100%;
  padding-top: 56%;
  background: rgba(15, 23, 42, 0.08);
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.card-image img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
}

.card-content {
  display: grid;
  gap: 1rem;
  padding: 2.4rem 2rem;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--color-slate-600);
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.75rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.12);
  color: var(--color-blue-600);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

.article-card h2 {
  margin: 0;
  font-size: 1.5rem;
  color: var(--color-slate-900);
  line-height: 1.3;
}

.article-card p {
  margin: 0;
  line-height: 1.65;
  color: var(--color-slate-600);
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-weight: 600;
  color: var(--color-blue-600);
}

.article-card:hover .card-footer span,
.article-card:focus-visible .card-footer span {
  text-decoration: underline;
}

.card-footer svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  transition: transform 200ms ease;
}

.article-card:hover .card-footer svg {
  transform: translateX(6px);
}

.empty-state {
  grid-column: 1 / -1;
  background: #fff;
  border-radius: var(--border-radius-lg);
  padding: clamp(2rem, 4vw, 3rem);
  text-align: center;
  border: 1px solid rgba(148, 163, 184, 0.16);
  box-shadow: var(--shadow-soft);
}

.empty-state h2 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
  color: var(--color-slate-900);
}

.empty-state p {
  margin: 0;
  color: var(--color-slate-600);
}

.recommended-section {
  padding-block: clamp(3rem, 7vw, 5rem);
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.03), rgba(15, 23, 42, 0));
}

.recommended-header {
  text-align: left;
  margin-bottom: 2.5rem;
  display: grid;
  gap: 0.75rem;
}

.recommended-header h2 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 2.5rem);
  color: var(--color-slate-900);
}

.recommended-header p {
  margin: 0;
  font-size: 1.05rem;
  color: var(--color-slate-600);
  max-width: 640px;
}

.recommended-grid {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.recommended-card {
  background: #fff;
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  border: 1px solid rgba(148, 163, 184, 0.16);
  box-shadow: var(--shadow-soft);
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.recommended-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-strong);
}

.recommended-card a {
  color: inherit;
  display: grid;
  gap: 1rem;
}

.recommended-card h3 {
  margin: 0;
  color: var(--color-slate-900);
  font-size: 1.35rem;
}

.recommended-card p {
  margin: 0;
  color: var(--color-slate-600);
  line-height: 1.6;
}

.recommended-card .learn-more {
  font-weight: 600;
  color: var(--color-blue-600);
}

.recommended-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 2rem;
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.16);
  background: rgba(255, 255, 255, 0.75);
  color: var(--color-slate-600);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.75);
}

.meta-label {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.75rem;
  opacity: 0.7;
}

.article-shell {
  padding-block: clamp(3rem, 6vw, 5rem);
}

.article-shell .container {
  display: grid;
  gap: 3rem;
  grid-template-columns: minmax(0, 1fr);
}

.toc-widget {
  background: #fff;
  border-radius: var(--border-radius-md);
  border: 1px solid rgba(148, 163, 184, 0.18);
  padding: 1.5rem 1.75rem;
  box-shadow: var(--shadow-soft);
}

.toc-widget__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.toc-widget__title-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.toc-widget__icon {
  width: 24px;
  height: 24px;
  color: var(--color-blue-600);
}

.toc-widget__title {
  margin: 0;
  font-size: 1.1rem;
  color: var(--color-slate-900);
}

.toc-widget__toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid rgba(148, 163, 184, 0.26);
  border-radius: 999px;
  background: #fff;
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-slate-600);
  cursor: pointer;
  transition: border-color 150ms ease, color 150ms ease;
}

.toc-widget__toggle:hover,
.toc-widget__toggle:focus-visible {
  border-color: var(--color-blue-500);
  color: var(--color-blue-600);
}

.toc-widget__toggle-text {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.toc-widget__chevron {
  width: 16px;
  height: 16px;
  transform: rotate(-90deg);
  transition: transform 200ms ease;
}

.toc-widget__description {
  margin: 0.75rem 0 1rem;
  font-size: 0.9rem;
  color: var(--color-slate-600);
}

.toc-widget__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.toc-widget__item--depth-2 {
  padding-left: 0.75rem;
}

.toc-widget__item--depth-3,
.toc-widget__item--depth-4,
.toc-widget__item--depth-5,
.toc-widget__item--depth-6 {
  padding-left: 1.5rem;
}

.toc-widget__item a {
  color: var(--color-slate-600);
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.4;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.toc-widget__item a::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.2);
  transition: background 150ms ease, transform 150ms ease;
}

.toc-widget__item a:hover::before,
.toc-widget__item a:focus-visible::before {
  background: var(--color-blue-600);
  transform: scale(1.4);
}

.toc-widget[data-collapsed='true'] .toc-widget__list {
  display: none;
}

.toc-widget[data-collapsed='false'] .toc-widget__chevron {
  transform: rotate(0deg);
}

.article-body {
  background: #fff;
  border-radius: var(--border-radius-lg);
  padding: clamp(2rem, 4vw, 3rem);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(148, 163, 184, 0.18);
  line-height: 1.75;
  font-size: 1.05rem;
  color: var(--color-slate-700);
}

.article-body h2,
.article-body h3 {
  color: var(--color-slate-900);
  margin-top: 2.4rem;
  letter-spacing: -0.02em;
}

.article-body h2 {
  font-size: 2rem;
}

.article-body h3 {
  font-size: 1.4rem;
}

.article-body p {
  margin-top: 1.25rem;
}

.article-body ul,
.article-body ol {
  margin: 1.25rem 0;
  padding-left: 1.25rem;
}

.article-body li + li {
  margin-top: 0.65rem;
}

.article-body a {
  color: var(--color-blue-600);
  font-weight: 600;
}

.article-body figure.article-image {
  margin: 2.5rem auto;
  display: grid;
  gap: 0.75rem;
  justify-items: center;
  text-align: center;
}

.article-body figure.article-image img {
  width: 100%;
  max-width: 640px;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-soft);
}

.article-body figure.article-image figcaption {
  font-size: 0.9rem;
  color: var(--color-slate-600);
  max-width: 580px;
}

.article-body .cta-inline {
  margin: 2.5rem 0;
  padding: 1.75rem;
  border-radius: var(--border-radius-md);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(99, 102, 241, 0.12));
  border: 1px solid rgba(37, 99, 235, 0.2);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  justify-content: space-between;
}

.article-body .cta-inline strong {
  font-size: 1.05rem;
  color: var(--color-slate-900);
}

.article-body .cta-inline .btn {
  min-width: 200px;
}

.table-standard {
  width: 100%;
  border-collapse: collapse;
  margin: 2.5rem 0;
  font-size: 0.98rem;
}

.table-standard thead th {
  text-align: left;
  padding: 0.9rem 1rem;
  background: rgba(37, 99, 235, 0.08);
  color: var(--color-slate-900);
  font-weight: 700;
  border-bottom: 1px solid rgba(148, 163, 184, 0.35);
}

.table-standard tbody td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);
  color: var(--color-slate-600);
}

.table-standard tbody tr:nth-child(even) td {
  background: rgba(241, 245, 249, 0.65);
}

.table-standard tbody tr:last-child td {
  border-bottom: none;
}

.table-standard caption {
  caption-side: top;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--color-slate-600);
}

.article-sidebar {
  display: grid;
  gap: 1.5rem;
}

.sidebar-card {
  border-radius: var(--border-radius-md);
  padding: 1.75rem;
  background: #fff;
  border: 1px solid rgba(148, 163, 184, 0.18);
  box-shadow: var(--shadow-soft);
}

.sidebar-card h2,
.sidebar-card h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
  color: var(--color-slate-900);
}

.sidebar-card p {
  margin: 0 0 1.25rem;
  color: var(--color-slate-600);
  line-height: 1.6;
}

.sidebar-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.65rem;
}

.sidebar-links a {
  color: var(--color-blue-600);
  font-weight: 600;
}

.site-footer {
  background: var(--color-slate-900);
  color: rgba(226, 232, 240, 0.9);
  padding-block: 3.5rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.site-footer h2 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin: 0 0 1rem;
  color: #fff;
}

.site-footer p,
.site-footer li {
  font-size: 0.95rem;
  line-height: 1.6;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.site-footer a {
  color: rgba(226, 232, 240, 0.9);
  transition: color 150ms ease;
}

.site-footer a:hover {
  color: #fff;
}

.footer-bottom {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(148, 163, 184, 0.3);
  text-align: center;
  font-size: 0.9rem;
  color: rgba(226, 232, 240, 0.7);
}

@media (min-width: 960px) {
  .article-shell .container {
    grid-template-columns: minmax(0, 1fr) 320px;
    align-items: start;
  }
}

@media (max-width: 720px) {
  .nav {
    display: none;
  }

  .hero,
  .hero-post {
    border-bottom-left-radius: 24px;
    border-bottom-right-radius: 24px;
  }

  .section-heading {
    text-align: center;
    justify-items: center;
  }

  .section-heading p {
    max-width: 520px;
  }

  .article-card {
    padding: 2rem 1.75rem;
  }

  .recommended-header {
    text-align: center;
  }

  .recommended-header p {
    margin-inline: auto;
  }
}