:root {
  --bg: #0f172a;
  --bg-soft: #111827;
  --surface: #111827;
  --surface-2: #162033;
  --surface-3: #0b1220;
  --ink: #f8fafc;
  --muted: #94a3b8;
  --muted-strong: #cbd5e1;
  --line: #1e293b;
  --line-strong: #334155;
  --accent: #38bdf8;
  --accent-strong: #7dd3fc;
  --accent-deep: #2563eb;
  --success: #34d399;
  --code-bg: #020617;
  --code-text: #e2e8f0;
  --shadow: 0 24px 80px rgba(2, 6, 23, 0.45);
  --radius: 8px;
  --content: 1240px;
  --reading: 850px;
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

[data-theme="light"] {
  --bg: #f8fafc;
  --bg-soft: #eef6ff;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --surface-3: #eaf2fb;
  --ink: #0f172a;
  --muted: #526177;
  --muted-strong: #334155;
  --line: #dbe4ef;
  --line-strong: #b8c7d9;
  --accent: #0369a1;
  --accent-strong: #075985;
  --accent-deep: #1d4ed8;
  --code-bg: #0f172a;
  --code-text: #e2e8f0;
  --shadow: 0 24px 80px rgba(15, 23, 42, 0.12);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.12), transparent 32rem),
    linear-gradient(180deg, var(--bg), var(--surface-3));
  color: var(--ink);
  font-size: 18px;
  line-height: 1.7;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-strong);
}

.reading-progress {
  position: fixed;
  z-index: 30;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--success));
  box-shadow: 0 0 18px rgba(56, 189, 248, 0.45);
}

.skip-link,
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link:focus {
  z-index: 40;
  width: auto;
  height: auto;
  clip: auto;
  left: 1rem;
  top: 1rem;
  padding: 0.6rem 0.8rem;
  background: var(--surface);
  border: 1px solid var(--line);
}

.header-inner,
.footer-inner,
.home-hero,
.featured-band,
.topics-band,
.page-shell,
.article-shell {
  width: min(var(--content), calc(100% - 48px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 78px;
  display: grid;
  grid-template-columns: minmax(250px, 1fr) auto auto auto auto;
  gap: 1rem;
  align-items: center;
}

.brand {
  display: inline-flex;
  gap: 0.8rem;
  align-items: center;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
  border-radius: 12px;
  filter: drop-shadow(0 14px 24px rgba(37, 99, 235, 0.22));
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  line-height: 1.15;
}

.brand-copy {
  display: grid;
  gap: 0.1rem;
}

.brand small {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.2;
}

.site-nav {
  display: flex;
  gap: 0.9rem;
  align-items: center;
}
.icon-button.menu-toggle {
  display: none;
}
.site-nav a,
.nav-dropdown > a {
  color: var(--muted-strong);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.site-nav a:hover,
.nav-dropdown:hover > a {
  color: var(--ink);
}

.nav-dropdown {
  position: relative;
  padding: 1.5rem 0;
}

.nav-dropdown-panel {
  position: absolute;
  top: 100%;
  left: -0.9rem;
  display: grid;
  min-width: 220px;
  gap: 0.2rem;
  padding: 0.55rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;
}

.nav-dropdown:hover .nav-dropdown-panel,
.nav-dropdown:focus-within .nav-dropdown-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-panel a {
  padding: 0.48rem 0.6rem;
  border-radius: 6px;
}

.nav-dropdown-panel a:hover {
  background: var(--surface-2);
}

.nav-dropdown,
.nav-dropdown-panel {
  display: none;
}

.icon-button {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--muted-strong);
  cursor: pointer;
}

.icon-button:hover {
  border-color: var(--line-strong);
  color: var(--ink);
}

.icon-button svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.search-open {
  justify-self: end;
}

.search-fallback {
  margin-top: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  padding: 1rem;
}

.search-fallback p {
  margin: 0 0 0.7rem;
  color: var(--muted);
}

.external-search {
  display: grid;
  gap: 0.75rem;
  margin: 1rem 0;
}

.external-search-term {
  margin: 0;
}

.external-search-term strong {
  color: var(--ink);
}

.external-search-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

.external-search-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-2);
  color: var(--muted-strong);
  font-size: 0.9rem;
  font-weight: 800;
  padding: 0.55rem 0.7rem;
  text-align: center;
  text-decoration: none;
}

.external-search-links a:hover {
  border-color: var(--line-strong);
  color: var(--ink);
}

.theme-toggle {
  justify-self: end;
  display: inline-grid;
  width: 58px;
  height: 32px;
  place-items: center;
  border: 0;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  padding: 0;
}

.theme-toggle-track {
  position: relative;
  display: block;
  width: 54px;
  height: 30px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface-2);
}

.theme-toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 18px rgba(56, 189, 248, 0.3);
  transition: transform 180ms ease, background 180ms ease;
}

.theme-toggle[aria-pressed="true"] .theme-toggle-thumb {
  transform: translateX(24px);
  background: var(--ink);
}

.home-hero {
  min-height: 570px;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 1.05fr);
  gap: 3rem;
  align-items: center;
  padding: 4.8rem 0 3.5rem;
}

.search-modal[hidden] {
  display: none;
}

.search-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: start center;
  padding: 12vh 1.25rem 1.25rem;
}

.search-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.72);
  backdrop-filter: blur(10px);
}

.search-dialog {
  position: relative;
  width: min(720px, 100%);
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 1.15rem;
}

.search-dialog-header {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.search-dialog-header h2 {
  margin: 0;
  font-size: 1.5rem;
  line-height: 1.2;
}

.modal-search-form input {
  width: 100%;
  min-height: 56px;
  padding: 0 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-3);
  color: var(--ink);
  font: inherit;
  font-size: 1rem;
}

.google-search-panel {
  display: grid;
  gap: 1rem;
  margin: 1.8rem 0 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.11), transparent 24rem),
    color-mix(in srgb, var(--surface) 94%, transparent);
  box-shadow: 0 18px 56px rgba(2, 6, 23, 0.22);
  padding: 1rem;
}

.google-search-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.85rem;
  align-items: center;
}

.google-search-row input {
  min-height: 64px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: color-mix(in srgb, var(--surface-3) 82%, var(--surface-2));
  color: var(--ink);
  font: inherit;
  font-size: 1.08rem;
  padding: 0 1.15rem;
  outline: none;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.google-search-row input::placeholder {
  color: var(--muted);
}

.google-search-row input:focus {
  border-color: var(--accent);
  box-shadow:
    0 0 0 4px rgba(56, 189, 248, 0.14),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.google-search-row .button {
  min-height: 64px;
  padding-inline: 1.35rem;
}

.search-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}

.search-suggestions a {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--muted-strong);
  font-size: 0.84rem;
  font-weight: 700;
  padding: 0.4rem 0.65rem;
  text-decoration: none;
}

.hero-copy h1,
.page-header h1,
.article-header h1 {
  margin: 0;
  max-width: 900px;
  font-size: clamp(2.7rem, 5.5vw, 5.4rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.article-header h1 {
  font-size: clamp(2.35rem, 4.4vw, 4.6rem);
}

.hero-copy p,
.page-header p,
.article-header p {
  max-width: 720px;
  color: var(--muted-strong);
  font-size: 1.12rem;
}

.hero-actions,
.topic-chips,
.footer-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.button,
.topic-chips a,
.footer-topics a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  font-weight: 800;
  text-decoration: none;
}

.button {
  padding: 0.7rem 1rem;
}

.button.primary {
  border: 1px solid rgba(125, 211, 252, 0.35);
  background: linear-gradient(135deg, var(--accent-deep), #0284c7);
  color: white;
  box-shadow: 0 18px 36px rgba(2, 132, 199, 0.22);
}

.button:hover,
.category-card:hover,
.download-card:hover,
.certification-card:hover {
  transform: translateY(-3px);
}

.button.secondary,
.topic-chips a,
.footer-topics a {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  padding: 0.55rem 0.8rem;
}

.hero-image,
.article-cover {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-image {
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.article-cover {
  display: block;
  width: min(1080px, 100%);
  height: auto;
  margin: 0 auto 2.4rem;
  object-fit: contain;
}

.eyebrow {
  margin: 0 0 0.7rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.featured-band,
.topics-band {
  padding: 3.5rem 0;
}

.section-heading {
  margin-bottom: 1.5rem;
}

.section-heading h2,
.related-posts h2 {
  margin: 0;
  font-size: 2.15rem;
  line-height: 1.15;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.15rem;
}

.post-card,
.path-card,
.download-card,
.topic-block,
.category-card,
.toc {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  box-shadow: 0 16px 44px rgba(2, 6, 23, 0.18);
}

.post-card {
  overflow: hidden;
  transition: transform 180ms ease, border-color 180ms ease;
}

.post-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-3px);
}
.post-card-body {
  padding: 1.1rem;
}

.post-tags,
.article-kicker {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.post-tags span,
.article-kicker a {
  border: 1px solid rgba(56, 189, 248, 0.18);
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.08);
  color: var(--accent-strong);
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1;
  padding: 0.42rem 0.55rem;
  text-decoration: none;
}

.post-card h3 {
  margin: 0.9rem 0 0.45rem;
  font-size: 1.18rem;
  line-height: 1.25;
}

.post-card h3 a {
  color: var(--ink);
  text-decoration: none;
}

.post-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.post-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.category-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.category-card {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  gap: 0.7rem;
  min-height: 230px;
  padding: 1.2rem;
  color: var(--ink);
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease;
}

.category-card:hover {
  border-color: var(--line-strong);
}

.category-icon {
  --ic-bg: var(--surface);
  --ic-bg2: color-mix(in srgb, var(--surface-2) 78%, var(--accent) 12%);
  --ic-stroke: var(--accent);
  --ic-stroke2: var(--accent-strong);
  --ic-accent: var(--accent-deep);
  --ic-accent2: var(--accent);
  --ic-highlight: var(--accent-strong);
  --ic-text: var(--ink);
  --ic-text2: var(--muted);
  --ic-shadow: rgba(56, 189, 248, 0.18);
  --ic-green: var(--success);
  --ic-amber: #f59e0b;
  --ic-red: #f87171;
  --ic-purple: #a78bfa;
  --ic-teal: #2dd4bf;
  display: inline-grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 1px solid rgba(56, 189, 248, 0.24);
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(56, 189, 248, 0.12), rgba(37, 99, 235, 0.06));
  box-shadow: inset 0 0 18px rgba(56, 189, 248, 0.08);
}

.category-icon svg {
  width: 34px;
  height: 34px;
  display: block;
  overflow: visible;
}

.category-icon img {
  display: block;
  width: 34px;
  height: 34px;
}

.category-icon .icon-line,
.category-icon .icon-panel {
  fill: none;
  stroke: var(--accent);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.4;
}

.category-icon .icon-panel {
  stroke: var(--accent-strong);
  opacity: 0.82;
}

.category-icon .icon-line.muted {
  opacity: 0.45;
}

.category-icon .icon-node {
  fill: var(--accent);
}

.category-card > span:not(.category-icon) {
  font-size: 1.2rem;
  font-weight: 800;
  line-height: 1.2;
}

.category-card strong {
  align-self: end;
  color: var(--accent-strong);
  font-size: 0.86rem;
}

.category-card span {
  font-size: 1.2rem;
  font-weight: 800;
}

.category-card strong {
  color: var(--muted);
  font-size: 0.86rem;
}

.category-card p,
.topic-block p,
.download-card p,
.certification-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.page-shell,
.article-shell {
  padding: 4rem 0 4.5rem;
}

.page-header,
.article-header {
  max-width: var(--reading);
  margin: 0 auto 2.2rem;
}

.page-content,
.article-content {
  max-width: var(--reading);
}

.page-content {
  margin-inline: auto;
}

.about-section {
  margin-bottom: 4.5rem;
}

.about-intro {
  display: grid;
  gap: 1rem;
  border-left: 4px solid var(--accent);
  padding-left: 1.3rem;
}

.about-section h2 {
  margin: 0 0 1.25rem;
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  line-height: 1.15;
  letter-spacing: 0;
}

.about-section p {
  color: var(--muted-strong);
  line-height: 1.85;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.6rem;
}

.about-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.1), transparent 16rem),
    color-mix(in srgb, var(--surface) 92%, transparent);
  box-shadow: 0 16px 44px rgba(2, 6, 23, 0.18);
  padding: 1.25rem;
  transition: transform 180ms ease, border-color 180ms ease;
}

.about-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-3px);
}

.about-card h3 {
  margin: 0 0 0.65rem;
  font-size: 1.18rem;
  line-height: 1.3;
}

.about-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.about-closing {
  margin-bottom: 0;
  border-top: 1px solid var(--line);
  padding-top: 2rem;
}

.about-closing p {
  color: var(--ink);
  font-size: 1.12rem;
  font-weight: 600;
}

.article-meta-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.article-meta-grid span {
  display: grid;
  gap: 0.15rem;
  padding: 0.8rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--muted-strong);
  font-size: 0.9rem;
}

.article-meta-grid strong {
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.article-layout {
  display: grid;
  grid-template-columns: 230px minmax(0, var(--reading));
  gap: 2.4rem;
  justify-content: center;
  align-items: start;
}

.toc {
  position: sticky;
  top: 104px;
  padding: 1rem;
  font-size: 0.88rem;
}

.toc strong {
  display: block;
  margin-bottom: 0.5rem;
}

.toc ol {
  display: grid;
  gap: 0.38rem;
  margin: 0;
  padding-left: 1.1rem;
}

.toc a {
  color: var(--muted-strong);
  text-decoration: none;
}

.article-content {
  min-width: 0;
}

.article-content h2,
.page-content h2 {
  margin-top: 2.8rem;
  margin-bottom: 0.7rem;
  font-size: 1.9rem;
  line-height: 1.2;
}

.article-content h3,
.page-content h3 {
  margin-top: 2rem;
  margin-bottom: 0.45rem;
  font-size: 1.35rem;
}

.article-content p,
.article-content ul,
.article-content ol,
.page-content p {
  margin-top: 0;
}

.article-content img {
  margin: 2rem 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.article-content blockquote,
.callout {
  margin: 1.7rem 0;
  padding: 1rem 1.1rem;
  border: 1px solid rgba(56, 189, 248, 0.22);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  background: rgba(56, 189, 248, 0.08);
}

.article-content code {
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface-2);
  padding: 0.1rem 0.3rem;
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.88em;
}

.article-content pre {
  position: relative;
  overflow-x: auto;
  margin: 1.6rem 0;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--code-bg);
  color: var(--code-text);
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.article-content pre code {
  border: 0;
  background: transparent;
  color: inherit;
  padding: 0;
}

/* Premium technical tables */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 2rem 0;
}

.article-content table,
.page-content table,
.table-wrap table {
  width: 100%;
  min-width: 680px;
  border: 1px solid var(--line);
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  box-shadow: 0 16px 44px rgba(2, 6, 23, 0.18);
  font-size: 0.95rem;
  overflow: hidden;
}

.article-content th,
.page-content th,
.table-wrap th {
  padding: 0.95rem 1.1rem;
  border-bottom: 1px solid var(--line);
  border-right: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--accent-strong);
  font-weight: 800;
  text-align: left;
  vertical-align: bottom;
}

.article-content td,
.page-content td,
.table-wrap td {
  padding: 0.95rem 1.1rem;
  border-bottom: 1px solid var(--line);
  border-right: 1px solid var(--line);
  color: var(--muted-strong);
  vertical-align: top;
}

.article-content th:last-child,
.article-content td:last-child,
.page-content th:last-child,
.page-content td:last-child,
.table-wrap th:last-child,
.table-wrap td:last-child {
  border-right: 0;
}

.article-content tr:last-child td,
.page-content tr:last-child td,
.table-wrap tr:last-child td {
  border-bottom: 0;
}

.article-content tbody tr:hover,
.page-content tbody tr:hover,
.table-wrap tbody tr:hover {
  background: color-mix(in srgb, var(--accent) 9%, transparent);
}

.article-content table code,
.page-content table code,
.table-wrap code {
  white-space: nowrap;
}

.copy-code {
  position: absolute;
  top: 0.7rem;
  right: 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: rgba(15, 23, 42, 0.82);
  color: var(--code-text);
  cursor: pointer;
  font: inherit;
  font-family: Inter, sans-serif;
  font-size: 0.74rem;
  font-weight: 800;
  padding: 0.25rem 0.5rem;
}

.learning-paths,
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.path-card,
.download-card,
.topic-block,
.certification-card {
  padding: 1.2rem;
  transition: transform 180ms ease, border-color 180ms ease;
}

.path-card h2,
.download-card h2,
.topic-block h2,
.certification-card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
}

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

.certification-card span {
  display: inline-flex;
  width: fit-content;
  margin-top: 0.7rem;
  border: 1px solid rgba(56, 189, 248, 0.18);
  border-radius: 999px;
  color: var(--accent-strong);
  font-size: 0.8rem;
  font-weight: 800;
  padding: 0.32rem 0.55rem;
}

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

.clean-list li {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  padding-top: 0.6rem;
}

.clean-list time {
  color: var(--muted);
  white-space: nowrap;
}

.related-posts {
  margin: 4rem auto 0;
  max-width: var(--content);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--surface-3);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(240px, 0.9fr) minmax(0, 1.6fr);
  gap: 3rem;
  align-items: start;
  padding: 3rem 0 2rem;
}

.footer-inner p {
  margin: 0.3rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer-logo {
  display: inline-flex;
  gap: 0.75rem;
  align-items: center;
}

.footer-logo .brand-mark {
  width: 40px;
  height: 40px;
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.2rem;
}

.footer-columns h2 {
  margin: 0 0 0.65rem;
  color: var(--ink);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer-columns a {
  display: block;
  margin: 0.35rem 0;
  color: var(--muted);
  font-size: 0.92rem;
  text-decoration: none;
}

.social-links {
  display: grid;
  gap: 0.5rem;
}

.social-links a {
  display: inline-flex;
  width: fit-content;
  min-height: 36px;
  align-items: center;
  gap: 0.55rem;
  margin: 0;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--muted-strong);
  padding: 0.35rem 0.45rem 0.35rem 0;
  transition: color 180ms ease, border-color 180ms ease, background 180ms ease, transform 180ms ease;
}

.social-links a:hover {
  border-color: var(--line);
  background: color-mix(in srgb, var(--surface) 65%, transparent);
  color: var(--ink);
  transform: translateX(3px);
}

.social-links svg {
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.copyright {
  grid-column: 1 / -1;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.pagefind-ui {
  --pagefind-ui-primary: var(--accent);
  --pagefind-ui-text: var(--ink);
  --pagefind-ui-background: var(--surface);
  --pagefind-ui-border: var(--line);
  --pagefind-ui-tag: var(--surface-2);
  --pagefind-ui-border-width: 1px;
  --pagefind-ui-border-radius: 8px;
  --pagefind-ui-font: Inter, sans-serif;
}
.category-detail-card {
  display: grid;
  align-content: start;
  gap: 0.55rem;
  min-height: 230px;
}

.category-detail-card strong {
  color: var(--accent-strong);
  font-size: 0.88rem;
}

.category-link {
  display: inline-flex;
  width: fit-content;
  margin-top: 0.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 800;
  padding: 0.42rem 0.65rem;
  text-decoration: none;
}

.category-link:hover {
  border-color: var(--line-strong);
  background: var(--surface-2);
}

.category-article-list {
  display: grid;
  gap: 1.2rem;
  margin-top: 2rem;
}

.category-articles {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  padding: 1.2rem;
}

.category-articles header {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: baseline;
  margin-bottom: 0.9rem;
}

.category-articles h2 {
  margin: 0;
  font-size: 1.45rem;
}

.category-articles header span {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

@media (max-width: 1040px) {
  .header-inner {
    position: relative;
    grid-template-columns: minmax(0, 1fr) auto auto auto;
    padding: 0.9rem 0;
  }

  .icon-button.menu-toggle {
    display: inline-grid;
  }

  .site-nav {
    position: absolute;
    z-index: 25;
    top: calc(100% + 0.65rem);
    left: 0;
    right: 0;
    display: none;
    grid-template-columns: 1fr;
    gap: 0.25rem;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: color-mix(in srgb, var(--surface) 96%, transparent);
    box-shadow: var(--shadow);
    padding: 0.55rem;
  }

  .nav-open .site-nav {
    display: grid;
  }

  .site-nav a {
    display: block;
    border-radius: 8px;
    padding: 0.7rem 0.8rem;
  }

  .site-nav a:hover {
    background: var(--surface-2);
  }

  .nav-dropdown {
    padding: 0;
  }

  .home-hero,
  .article-layout,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
    max-width: var(--reading);
    margin-inline: auto;
  }

  .post-grid,
  .category-card-grid,
  .learning-paths,
  .download-grid,
  .certification-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.post-image-link {
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: color-mix(in srgb, var(--surface-2) 86%, var(--bg));
}

.post-image-link img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

@media (max-width: 680px) {
  body {
    font-size: 17px;
  }

  .header-inner,
  .footer-inner,
  .home-hero,
  .featured-band,
  .topics-band,
  .page-shell,
  .article-shell {
    width: min(100% - 28px, var(--content));
  }

  .brand-mark {
    width: 40px;
    height: 40px;
  }

  .brand small {
    display: none;
  }

  .home-hero {
    min-height: auto;
    padding-top: 2.4rem;
  }

  .hero-copy h1,
  .page-header h1,
  .article-header h1 {
    font-size: 2.45rem;
  }

  .post-image-link {
    aspect-ratio: auto;
    max-height: none;
  }

  .post-image-link img {
    height: auto;
    object-fit: contain;
  }

  .post-grid,
  .category-card-grid,
  .about-grid,
  .learning-paths,
  .download-grid,
  .certification-grid,
  .article-meta-grid,
  .external-search-links,
  .google-search-row {
    grid-template-columns: 1fr;
  }

  .footer-columns {
    grid-template-columns: 1fr;
  }

  .post-card-meta,
  .clean-list li {
    display: grid;
    justify-content: start;
  }
}