@font-face {
  font-family: "Geist Sans";
  src: url("./fonts/GeistSans.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Geist Mono";
  src: url("./fonts/GeistMono.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --bg: #050505;
  --panel: rgba(8, 10, 12, 0.66);
  --panel-strong: rgba(10, 12, 14, 0.88);
  --line: rgba(255, 255, 255, 0.1);
  --text: #f6f2eb;
  --muted: rgba(246, 242, 235, 0.68);
  --dim: rgba(246, 242, 235, 0.46);
  --accent: #3DA9FC;
  --accent-2: #64d8ff;
  --accent-3: #ffffff;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
  color: var(--text);
  font-family: "Geist Sans", Arial, sans-serif;
  scroll-behavior: auto;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-height: 100vh;
  background: #050505;
  overflow-x: hidden;
}

a {
  color: inherit;
}

.learn-static-stage {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 22% 18%, rgba(61, 169, 252, 0.1), transparent 24%),
    radial-gradient(circle at 78% 12%, rgba(255, 157, 92, 0.08), transparent 20%),
    #050505;
}

.learn-static-grid,
.learn-static-wash {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.learn-static-grid {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 86px 86px;
  mask-image: radial-gradient(circle at center, black 36%, transparent 86%);
}

.learn-static-wash {
  background:
    linear-gradient(90deg, rgba(5, 5, 5, 0.9) 0%, rgba(5, 5, 5, 0.58) 48%, rgba(5, 5, 5, 0.88) 100%),
    linear-gradient(180deg, rgba(5, 5, 5, 0.28), rgba(5, 5, 5, 0.92));
}

.learning-hub-shell {
  position: relative;
  z-index: 2;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.learning-hub-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100vw;
  min-height: 78px;
  margin-left: calc(50% - 50vw);
  padding: 1.22rem clamp(22px, 3.5vw, 48px);
  border: 1px solid transparent;
  background: rgba(5, 5, 5, 0.92);
}

.learning-hub-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
  font-size: 1.62rem;
  font-weight: 500;
  letter-spacing: 0;
}

.learning-hub-brand img {
  width: auto;
  height: 46px;
  object-fit: contain;
}

.learning-hub-nav-links {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  color: rgba(245, 245, 240, 0.72);
  font-family: "Geist Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.learning-hub-nav-links a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 0.95rem;
  border-radius: 0;
  text-decoration: none;
  transition: color 180ms ease, transform 180ms ease;
}

.learning-hub-nav-links a::before {
  content: "";
  position: absolute;
  inset: 4px;
  pointer-events: none;
  opacity: 0;
  background:
    linear-gradient(var(--accent), var(--accent)) left top / 12px 1.5px no-repeat,
    linear-gradient(var(--accent), var(--accent)) left top / 1.5px 12px no-repeat,
    linear-gradient(var(--accent), var(--accent)) right top / 12px 1.5px no-repeat,
    linear-gradient(var(--accent), var(--accent)) right top / 1.5px 12px no-repeat,
    linear-gradient(var(--accent), var(--accent)) left bottom / 12px 1.5px no-repeat,
    linear-gradient(var(--accent), var(--accent)) left bottom / 1.5px 12px no-repeat,
    linear-gradient(var(--accent), var(--accent)) right bottom / 12px 1.5px no-repeat,
    linear-gradient(var(--accent), var(--accent)) right bottom / 1.5px 12px no-repeat;
  transform: scale(0.94);
  transition: opacity 180ms cubic-bezier(0.22, 1, 0.36, 1),
              transform 180ms cubic-bezier(0.22, 1, 0.36, 1);
}

.learning-hub-nav-links a:hover {
  color: var(--text);
}

.learning-hub-nav-links a:hover::before,
.learning-hub-nav-links a:focus-visible::before,
.learning-hub-nav-links a.is-activating::before {
  opacity: 1;
  transform: scale(1);
}

.learning-hub-nav-links a.is-activating {
  color: #fff;
}

.learning-hub-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 52px;
  align-items: end;
  min-height: 72vh;
  padding: clamp(86px, 10vw, 142px) 0 58px;
}

.learning-hub-hero.is-single {
  grid-template-columns: minmax(0, 960px);
  min-height: auto;
  padding: clamp(42px, 7vw, 88px) 0 58px;
}

.learning-hub-hero.is-index {
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 0.72fr);
  min-height: 78vh;
  align-items: center;
}

.learning-hub-hero-copy {
  align-self: end;
}

.learning-hub-index-feature {
  min-width: 0;
  align-self: end;
}

.learning-hub-hero h1 {
  max-width: 860px;
  margin: 0 0 18px;
  font-size: clamp(3.2rem, 8vw, 7.6rem);
  line-height: 0.9;
  letter-spacing: 0;
}

.learning-hub-dek {
  max-width: 760px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.5;
}

.learning-hub-side {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 18px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
}

.learning-hub-visual {
  position: relative;
  display: grid;
  align-content: end;
  min-height: 180px;
  margin-bottom: 18px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 24% 24%, color-mix(in srgb, var(--hub-accent) 34%, transparent), transparent 28%),
    linear-gradient(135deg, color-mix(in srgb, var(--hub-accent) 22%, transparent), rgba(255, 255, 255, 0.035) 42%, rgba(0, 0, 0, 0.5)),
    rgba(8, 10, 12, 0.82);
}

.learning-hub-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.78) contrast(1.08) brightness(0.52);
  opacity: 0.68;
  transform: scale(1.02);
}

.learning-hub-visual::before,
.learning-hub-visual::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.learning-hub-visual::before {
  inset: 16px;
  z-index: 2;
  background:
    linear-gradient(var(--hub-accent), var(--hub-accent)) left top / 26px 2px no-repeat,
    linear-gradient(var(--hub-accent), var(--hub-accent)) left top / 2px 26px no-repeat,
    linear-gradient(var(--hub-accent), var(--hub-accent)) right bottom / 26px 2px no-repeat,
    linear-gradient(var(--hub-accent), var(--hub-accent)) right bottom / 2px 26px no-repeat;
  opacity: 0.82;
}

.learning-hub-visual::after {
  z-index: 1;
  inset: 0;
  right: auto;
  bottom: auto;
  width: auto;
  height: auto;
  border: 0;
  transform: none;
  opacity: 1;
  background:
    linear-gradient(180deg, rgba(5, 5, 5, 0.05), rgba(5, 5, 5, 0.76)),
    radial-gradient(circle at 18% 18%, color-mix(in srgb, var(--hub-accent) 24%, transparent), transparent 34%),
    linear-gradient(90deg, rgba(5, 5, 5, 0.72), rgba(5, 5, 5, 0.22));
}

.learning-hub-visual-grid {
  position: absolute;
  inset: 0;
  z-index: 2;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px);
  background-size: 30px 30px;
  mask-image: linear-gradient(135deg, black, transparent 72%);
  opacity: 0.56;
}

.learning-hub-visual-mark {
  position: relative;
  z-index: 3;
  padding: 0 18px;
  color: #fff;
  font-family: "Geist Mono", monospace;
  font-size: clamp(2.7rem, 6vw, 4.8rem);
  font-weight: 850;
  letter-spacing: 0;
  line-height: 0.86;
  text-shadow: 0 0 26px color-mix(in srgb, var(--hub-accent) 46%, transparent);
}

.learning-hub-visual-caption {
  position: relative;
  z-index: 3;
  padding: 8px 18px 16px;
  color: var(--hub-accent);
  font-family: "Geist Mono", monospace;
  font-size: 0.72rem;
  font-weight: 760;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.learning-hub-visual.is-card {
  min-height: 98px;
  margin: 0 0 16px;
}

.learning-hub-visual.is-card::before {
  inset: 10px;
}

.learning-hub-visual.is-card::after {
  width: auto;
  height: auto;
}

.learning-hub-visual.is-card .learning-hub-visual-mark {
  padding: 0 14px;
  font-size: 2.3rem;
}

.learning-hub-visual.is-card .learning-hub-visual-caption {
  padding: 6px 14px 12px;
  font-size: 0.62rem;
}

.learning-hub-side strong {
  display: block;
  margin: 0 0 8px;
  font-size: 0.95rem;
}

.learning-hub-side p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.learning-hub-index-banner {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(280px, 0.42fr);
  gap: clamp(24px, 4vw, 54px);
  align-items: center;
  margin: 0 0 58px;
  padding: clamp(30px, 5vw, 58px) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.learning-hub-kicker {
  margin: 0 0 16px;
  color: var(--accent-2);
  font-family: "Geist Mono", monospace;
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.learning-hub-index-banner h2 {
  max-width: 760px;
  margin: 0 0 14px;
  font-size: clamp(2rem, 4.2vw, 4.4rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.learning-hub-index-banner p {
  max-width: 760px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.02rem, 1.8vw, 1.22rem);
  line-height: 1.58;
}

.learning-hub-index-stats {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.learning-hub-index-stats span {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  min-height: 72px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  font-family: "Geist Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.035);
}

.learning-hub-index-stats strong {
  color: var(--text);
  font-family: "Geist Sans", Arial, sans-serif;
  font-size: clamp(2rem, 4vw, 3.8rem);
  line-height: 0.9;
  letter-spacing: 0;
}

.learning-hub-visual.is-banner {
  min-height: clamp(220px, 24vw, 310px);
  margin: 0;
}

.learning-hub-visual.is-banner .learning-hub-visual-mark {
  font-size: clamp(3.4rem, 7vw, 6.6rem);
}

.learning-hub-page-banner {
  margin: -10px 0 58px;
  padding: 0 0 42px;
  border-bottom: 1px solid var(--line);
}

.learning-hub-page-banner.is-top {
  margin: clamp(34px, 5vw, 64px) 0 0;
  padding: 0;
  border-bottom: 0;
}

.learning-hub-page-banner .learning-hub-visual {
  min-height: clamp(260px, 31vw, 420px);
  margin: 0;
  box-shadow: 0 32px 90px rgba(0, 0, 0, 0.28);
}

.learning-hub-page-banner.is-top .learning-hub-visual {
  min-height: clamp(300px, 40vw, 500px);
}

.learning-hub-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.learning-hub-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: #f6f2eb;
  color: #090909;
  font-weight: 760;
  text-decoration: none;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.learning-hub-button:hover {
  transform: translateY(-1px);
  background: #ffffff;
}

.learning-hub-button.secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.learning-hub-button.text-link {
  border-color: transparent;
  background: transparent;
  color: var(--muted);
  padding-inline: 6px;
}

.learning-hub-button.text-link:hover {
  color: #fff;
  background: transparent;
}

.learning-hub-section {
  padding: 58px 0;
  border-top: 1px solid var(--line);
}

.learning-hub-section.is-compact {
  padding: 34px 0;
}

.learning-hub-grid {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 48px;
}

.learning-hub-section h2 {
  margin: 8px 0 0;
  font-size: clamp(1.65rem, 3.2vw, 3rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.learning-hub-section-head {
  max-width: 820px;
}

.learning-hub-section-head p:not(.learning-hub-kicker) {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 1.06rem;
  line-height: 1.58;
}

.learning-hub-path-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.learning-hub-path-card {
  display: flex;
  min-height: 238px;
  flex-direction: column;
  gap: 16px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: inherit;
  text-decoration: none;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.052), rgba(255, 255, 255, 0.018)),
    rgba(8, 10, 12, 0.62);
  transition: border-color 180ms ease, transform 180ms ease, background 180ms ease;
}

.learning-hub-path-card:hover {
  transform: translateY(-2px);
  border-color: rgba(61, 169, 252, 0.36);
  background:
    linear-gradient(180deg, rgba(61, 169, 252, 0.095), rgba(255, 255, 255, 0.018)),
    rgba(8, 10, 12, 0.76);
}

.learning-hub-path-card strong {
  max-width: 210px;
  font-size: 1.18rem;
  line-height: 1.12;
}

.learning-hub-path-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.52;
}

.learning-hub-path-card .card-cta {
  margin-top: auto;
  align-self: flex-end;
}

.learning-hub-problem-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 26px;
}

.learning-hub-problem-card {
  min-height: 190px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.048), rgba(255, 255, 255, 0.016)),
    rgba(8, 10, 12, 0.6);
}

.learning-hub-problem-card h3 {
  margin: 0 0 12px;
  font-size: 1.02rem;
  line-height: 1.25;
}

.learning-hub-problem-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.learning-hub-library-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 380px);
  gap: 24px;
  align-items: end;
}

.learning-hub-search {
  display: grid;
  gap: 10px;
  color: var(--muted);
  font-family: "Geist Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.learning-hub-search input {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  font: 500 0.98rem/1.2 "Geist Sans", Arial, sans-serif;
  letter-spacing: 0;
  background: rgba(8, 10, 12, 0.72);
  padding: 0 14px;
}

.learning-hub-search input:focus {
  outline: none;
  border-color: rgba(61, 169, 252, 0.52);
  box-shadow: 0 0 0 3px rgba(61, 169, 252, 0.12);
}

.learning-hub-filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.learning-hub-filter,
.learning-hub-pagination button {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font: 700 0.72rem/1 "Geist Mono", monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(8, 10, 12, 0.68);
  padding: 0 14px;
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.learning-hub-filter:hover,
.learning-hub-pagination button:hover,
.learning-hub-filter.is-active,
.learning-hub-pagination button.is-active {
  color: var(--text);
  border-color: rgba(61, 169, 252, 0.42);
  background: rgba(61, 169, 252, 0.12);
}

.learning-hub-pagination {
  display: flex;
  justify-content: center;
  gap: 10px;
  min-height: 38px;
}

.learning-hub-empty {
  margin: 24px 0 0;
  color: var(--muted);
}

.learning-hub-topic-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.learning-hub-topic-row.is-hero {
  max-width: 780px;
  margin-top: 30px;
}

.learning-hub-topic-row span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid rgba(61, 169, 252, 0.24);
  border-radius: 999px;
  color: var(--muted);
  font-family: "Geist Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.03em;
  background: rgba(61, 169, 252, 0.055);
}

.learning-hub-topic-row span:first-child {
  color: var(--text);
  border-color: rgba(61, 169, 252, 0.42);
}

.learning-hub-copy {
  display: grid;
  gap: 18px;
}

.learning-hub-map {
  margin-top: 24px;
  width: 100%;
  max-width: 100%;
  padding: clamp(24px, 3vw, 40px);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 18% 22%, color-mix(in srgb, var(--hub-accent) 18%, transparent), transparent 30%),
    linear-gradient(135deg, color-mix(in srgb, var(--hub-accent) 7%, transparent), rgba(255, 255, 255, 0.018) 42%, transparent),
    rgba(8, 10, 12, 0.58);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.22);
}

.learning-hub-map svg {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  color: var(--hub-accent);
}

.map-lane {
  fill: none;
  stroke: rgba(255, 255, 255, 0.08);
  stroke-width: 1;
  stroke-dasharray: 8 12;
}

.map-line {
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  opacity: 0.56;
}

.map-line.is-highlight {
  stroke-width: 3;
  opacity: 0.92;
  filter: drop-shadow(0 0 8px color-mix(in srgb, var(--hub-accent) 60%, transparent));
}

.map-title {
  fill: rgba(246, 242, 235, 0.74);
  font-family: "Geist Sans", Arial, sans-serif;
  font-size: 22px;
  font-weight: 760;
}

.map-node rect {
  fill: rgba(255, 255, 255, 0.055);
  stroke: color-mix(in srgb, var(--hub-accent) 55%, rgba(255, 255, 255, 0.16));
}

.map-node.is-highlight rect {
  fill: color-mix(in srgb, var(--hub-accent) 24%, rgba(255, 255, 255, 0.08));
  stroke: var(--hub-accent);
  stroke-width: 2.5;
  filter: drop-shadow(0 0 18px color-mix(in srgb, var(--hub-accent) 52%, transparent));
}

.map-highlight-label {
  fill: var(--hub-accent);
  font-family: "Geist Mono", monospace;
  font-size: 11px;
  font-weight: 820;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.map-node text {
  fill: var(--text);
  font-family: "Geist Mono", monospace;
  font-size: 14px;
  font-weight: 760;
}

.map-node.is-highlight text {
  fill: #fff;
  font-weight: 860;
}

.map-caption {
  fill: var(--muted);
  font-family: "Geist Sans", Arial, sans-serif;
  font-size: 15px;
}

.quick-answer,
.learning-hub-card,
.learning-hub-faq details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.025)),
    var(--panel);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.18);
}

.quick-answer {
  padding: 22px;
  border-color: rgba(143, 216, 255, 0.34);
}

.quick-answer p,
.learning-hub-card p,
.learning-hub-copy p,
.learning-hub-faq p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

.learning-hub-card {
  padding: 20px;
}

.learning-hub-card h3 {
  margin: 0 0 9px;
  font-size: 1.12rem;
}

.learning-hub-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.learning-hub-list li {
  position: relative;
  padding-left: 22px;
  color: var(--muted);
  line-height: 1.62;
}

.learning-hub-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-2);
}

.learning-hub-insight-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.learning-hub-insight-card {
  min-height: 142px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 12% 18%, rgba(61, 169, 252, 0.13), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.022)),
    var(--panel);
  box-shadow: 0 18px 52px rgba(0, 0, 0, 0.16);
}

.learning-hub-insight-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-bottom: 18px;
  border: 1px solid rgba(61, 169, 252, 0.34);
  border-radius: 50%;
  color: var(--accent-2);
  font-family: "Geist Mono", monospace;
  font-size: 0.72rem;
  font-weight: 780;
}

.learning-hub-insight-card p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.62;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.related-card {
  display: flex;
  flex-direction: column;
  min-height: 150px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.052), rgba(255, 255, 255, 0.022)),
    var(--panel);
  text-decoration: none;
  transition: transform 220ms cubic-bezier(0.22, 1, 0.36, 1), border-color 220ms ease, background 220ms ease;
}

.related-card:hover {
  transform: translateY(-3px);
  border-color: rgba(46, 168, 255, 0.38);
  background: rgba(16, 18, 22, 0.76);
}

.related-card strong {
  display: block;
  font-size: 1.06rem;
  line-height: 1.28;
}

.card-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  margin-top: 18px;
  margin-left: auto;
  align-self: flex-end;
  padding: 0 12px;
  border: 1px solid rgba(61, 169, 252, 0.28);
  border-radius: 999px;
  color: var(--text);
  font-family: "Geist Mono", monospace;
  font-size: 0.68rem;
  font-weight: 760;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(61, 169, 252, 0.08);
}

.card-cta::after {
  content: "->";
  color: var(--accent);
  font-size: 0.82rem;
}

.learning-hub-faq {
  display: grid;
  gap: 12px;
}

.learning-hub-faq details {
  padding: 18px 20px;
}

.learning-hub-faq summary {
  cursor: pointer;
  font-weight: 720;
  list-style: none;
  outline: none;
  user-select: none;
  -webkit-user-select: none;
}

.learning-hub-faq summary::-webkit-details-marker {
  display: none;
}

.learning-hub-faq summary::before {
  content: "";
  display: inline-block;
  width: 0;
  height: 0;
  margin-right: 9px;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 7px solid currentColor;
  color: rgba(246, 242, 235, 0.82);
  transform: translateY(1px);
  transition: transform 160ms ease, color 160ms ease;
}

.learning-hub-faq details[open] summary::before {
  transform: translateY(1px) rotate(90deg);
  color: var(--accent);
}

.learning-hub-faq summary:focus,
.learning-hub-faq summary:focus-visible {
  outline: none;
}

.learning-hub-faq summary:hover {
  color: #fff;
}

.learning-hub-faq p {
  padding-top: 12px;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  padding: 24px 0 64px;
}

.hub-card {
  min-height: 250px;
}

.hub-card p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

@media (max-width: 880px) {
  .learning-hub-shell {
    width: min(100% - 28px, 720px);
  }

  .learning-hub-nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .learning-hub-nav-links {
    flex-wrap: wrap;
    gap: 12px;
  }

  .learning-hub-hero,
  .learning-hub-grid,
  .learning-hub-index-banner {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .learning-hub-insight-grid {
    grid-template-columns: 1fr;
  }

  .learning-hub-path-grid {
    grid-template-columns: 1fr;
  }

  .learning-hub-problem-grid,
  .learning-hub-library-head {
    grid-template-columns: 1fr;
  }

  .learning-hub-hero {
    padding-top: 52px;
  }

  .learning-hub-hero.is-index,
  .learning-hub-hero.is-single {
    min-height: auto;
  }

  .related-grid,
  .hub-grid {
    grid-template-columns: 1fr;
  }
}