:root {
  color-scheme: dark;
  --bg: #0b0712;
  --bg-elevated: #120c1d;
  --bg-soft: #181024;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-hover: rgba(168, 85, 247, 0.09);
  --line: rgba(216, 195, 241, 0.14);
  --line-strong: rgba(168, 85, 247, 0.34);
  --text: #f6f1fb;
  --muted: #aca2b9;
  --faint: #7d728c;
  --accent: #a855f7;
  --accent-strong: #7b2cf5;
  --accent-soft: #dcbcfb;
  --code: #0f0a18;
  --header-height: 4.5rem;
  --sidebar-width: 17rem;
  --toc-width: 15rem;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.3);
}

:root[data-theme='light'] {
  color-scheme: light;
  --bg: #fcfbfd;
  --bg-elevated: #ffffff;
  --bg-soft: #f4f0f8;
  --surface: rgba(75, 42, 103, 0.045);
  --surface-hover: rgba(123, 44, 245, 0.07);
  --line: rgba(55, 35, 72, 0.13);
  --line-strong: rgba(123, 44, 245, 0.28);
  --text: #1b1422;
  --muted: #665c70;
  --faint: #8b8194;
  --accent: #7929e6;
  --accent-strong: #6420c4;
  --accent-soft: #4d198f;
  --code: #f3eff7;
  --shadow: 0 24px 70px rgba(39, 19, 55, 0.11);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 2rem);
}

body {
  margin: 0;
  min-width: 20rem;
  background:
    radial-gradient(circle at 78% -10%, rgba(123, 44, 245, 0.12), transparent 30rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  transform: translateY(-180%);
  border-radius: 0.5rem;
  background: var(--accent);
  color: white;
  padding: 0.55rem 0.9rem;
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0);
}

.topbar {
  position: sticky;
  z-index: 50;
  top: 0;
  display: flex;
  height: var(--header-height);
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  padding: 0 2rem;
  backdrop-filter: blur(20px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
}

.brand .logo {
  display: block;
  width: 8.1rem;
  height: auto;
}

.logo-light {
  display: none !important;
}

:root[data-theme='light'] .logo-dark {
  display: none !important;
}

:root[data-theme='light'] .logo-light {
  display: block !important;
}

.brand span {
  border-left: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  line-height: 1;
  padding-left: 0.9rem;
  text-transform: uppercase;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.search-trigger,
.icon-button,
.github-link {
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  background: var(--surface);
  color: var(--muted);
  transition: 160ms ease;
}

.search-trigger {
  display: flex;
  min-width: 15rem;
  align-items: center;
  gap: 0.55rem;
  padding: 0.48rem 0.55rem 0.48rem 0.72rem;
  text-align: left;
}

.search-trigger span:nth-child(2) {
  flex: 1;
}

kbd {
  border: 1px solid var(--line);
  border-radius: 0.3rem;
  background: var(--bg-soft);
  color: var(--faint);
  font-size: 0.68rem;
  line-height: 1;
  padding: 0.3rem 0.38rem;
}

.icon-button {
  display: grid;
  width: 2.4rem;
  height: 2.4rem;
  place-items: center;
}

.github-link {
  padding: 0.43rem 0.78rem;
  font-size: 0.82rem;
  font-weight: 650;
  text-decoration: none;
}

.search-trigger:hover,
.icon-button:hover,
.github-link:hover {
  border-color: var(--line-strong);
  background: var(--surface-hover);
  color: var(--text);
}

.menu-button {
  display: none;
}

.layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr) var(--toc-width);
  max-width: 96rem;
  margin: 0 auto;
}

.sidebar {
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
  border-right: 1px solid var(--line);
  padding: 2rem 1.5rem 4rem;
}

.nav-section + .nav-section {
  margin-top: 1.75rem;
}

.nav-section h2 {
  margin: 0 0 0.45rem;
  color: var(--faint);
  font-size: 0.67rem;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav-section a {
  display: block;
  margin: 0.1rem -0.65rem;
  border-radius: 0.4rem;
  color: var(--muted);
  font-size: 0.83rem;
  font-weight: 500;
  line-height: 1.35;
  padding: 0.5rem 0.65rem;
  text-decoration: none;
}

.nav-section a:hover {
  background: var(--surface);
  color: var(--text);
}

.nav-section a[aria-current='page'] {
  background: var(--surface-hover);
  color: var(--accent-soft);
  font-weight: 650;
}

.content {
  min-width: 0;
  padding: 4.7rem clamp(2rem, 5vw, 5rem) 8rem;
}

.content article {
  max-width: 49rem;
  margin: 0 auto;
}

.eyebrow,
.hero-kicker,
.section-heading span,
.home-cta span {
  color: var(--accent-soft);
  font-size: 0.7rem;
  font-weight: 750;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.content h1 {
  margin: 0.55rem 0 1rem;
  font-size: clamp(2.25rem, 5vw, 3.65rem);
  letter-spacing: -0.05em;
  line-height: 1.04;
}

.lede {
  max-width: 45rem;
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.7;
}

.article-actions {
  margin: 1.35rem 0 3rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid var(--line);
}

.article-actions a {
  color: var(--faint);
  font-size: 0.76rem;
  font-weight: 600;
  text-decoration: none;
}

.article-actions a:hover {
  color: var(--accent-soft);
}

.markdown h2,
.markdown h3,
.markdown h4,
.markdown h5,
.markdown h6 {
  position: relative;
  color: var(--text);
  letter-spacing: -0.025em;
  line-height: 1.25;
}

.markdown h2 {
  margin: 3.3rem 0 1rem;
  border-top: 1px solid var(--line);
  padding-top: 2.25rem;
  font-size: 1.7rem;
}

.markdown h3 {
  margin: 2.4rem 0 0.8rem;
  font-size: 1.3rem;
}

.markdown h4 {
  margin: 2rem 0 0.65rem;
  font-size: 1.05rem;
}

.heading-anchor {
  position: absolute;
  left: -1.1em;
  color: var(--accent);
  opacity: 0;
  text-decoration: none;
}

.markdown :is(h2, h3, h4):hover .heading-anchor,
.heading-anchor:focus {
  opacity: 1;
}

.markdown p,
.markdown li {
  color: color-mix(in srgb, var(--text) 82%, var(--muted));
}

.markdown strong {
  color: var(--text);
}

.markdown a {
  color: var(--accent-soft);
  text-decoration-color: color-mix(in srgb, var(--accent) 50%, transparent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

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

.markdown blockquote {
  margin: 1.7rem 0;
  border-left: 3px solid var(--accent);
  border-radius: 0 0.55rem 0.55rem 0;
  background: var(--surface-hover);
  padding: 0.9rem 1.25rem;
}

.markdown blockquote > :first-child {
  margin-top: 0;
}

.markdown blockquote > :last-child {
  margin-bottom: 0;
}

.markdown :not(pre) > code {
  border: 1px solid var(--line);
  border-radius: 0.3rem;
  background: var(--code);
  color: var(--accent-soft);
  font-size: 0.86em;
  padding: 0.12rem 0.32rem;
}

.markdown pre {
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: var(--code);
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.025);
  padding: 1.15rem 1.25rem;
}

.markdown pre code {
  color: color-mix(in srgb, var(--text) 86%, var(--accent-soft));
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.79rem;
  line-height: 1.65;
}

.table-wrap {
  overflow-x: auto;
  margin: 1.7rem 0;
  border: 1px solid var(--line);
  border-radius: 0.6rem;
}

.markdown table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.markdown th,
.markdown td {
  min-width: 8rem;
  border-bottom: 1px solid var(--line);
  padding: 0.7rem 0.8rem;
  text-align: left;
  vertical-align: top;
}

.markdown th {
  background: var(--surface);
  color: var(--text);
  font-size: 0.72rem;
}

.markdown tr:last-child td {
  border-bottom: 0;
}

.markdown hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 3rem 0;
}

.toc {
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
  padding: 4.7rem 1.5rem 4rem 1rem;
}

.toc p {
  margin: 0 0 0.7rem;
  color: var(--text);
  font-size: 0.72rem;
  font-weight: 700;
}

.toc a {
  display: block;
  border-left: 1px solid var(--line);
  color: var(--faint);
  font-size: 0.72rem;
  line-height: 1.42;
  padding: 0.34rem 0 0.34rem 0.8rem;
  text-decoration: none;
}

.toc a:hover,
.toc a[aria-current] {
  border-left-color: var(--accent);
  color: var(--accent-soft);
}

.toc-level-3 {
  padding-left: 1.35rem !important;
}

.pagers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 4rem;
  border-top: 1px solid var(--line);
  padding-top: 1.5rem;
}

.pager {
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: var(--surface);
  padding: 0.9rem 1rem;
  text-decoration: none;
}

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

.pager span,
.pager strong {
  display: block;
}

.pager span {
  color: var(--faint);
  font-size: 0.67rem;
  text-transform: uppercase;
}

.pager strong {
  margin-top: 0.25rem;
  font-size: 0.8rem;
}

.pager.next {
  grid-column: 2;
  text-align: right;
}

.search-dialog {
  width: min(42rem, calc(100vw - 2rem));
  max-height: min(40rem, calc(100vh - 4rem));
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 0.8rem;
  background: var(--bg-elevated);
  box-shadow: var(--shadow);
  color: var(--text);
  padding: 0;
}

.search-dialog::backdrop {
  background: rgba(4, 2, 8, 0.72);
  backdrop-filter: blur(4px);
}

.search-box {
  display: flex;
  max-height: min(40rem, calc(100vh - 4rem));
  flex-direction: column;
}

.search-field {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  border-bottom: 1px solid var(--line);
  padding: 0.8rem 0.9rem;
}

.search-field input {
  min-width: 0;
  flex: 1;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
}

.search-field button {
  border: 1px solid var(--line);
  border-radius: 0.35rem;
  background: var(--surface);
  color: var(--faint);
  font-size: 0.65rem;
  padding: 0.25rem 0.4rem;
}

.search-results {
  overflow-y: auto;
  padding: 0.55rem;
}

.search-results > p {
  color: var(--faint);
  padding: 1rem;
  text-align: center;
}

.search-results a {
  display: block;
  border-radius: 0.55rem;
  padding: 0.75rem 0.85rem;
  text-decoration: none;
}

.search-results a:hover {
  background: var(--surface-hover);
}

.search-results a span,
.search-results a strong,
.search-results a small {
  display: block;
}

.search-results a span {
  color: var(--accent-soft);
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.search-results a strong {
  margin-top: 0.1rem;
  font-size: 0.9rem;
}

.search-results a small {
  margin-top: 0.15rem;
  color: var(--muted);
  font-size: 0.73rem;
}

.home-content {
  grid-column: 2 / -1;
  min-width: 0;
  overflow: hidden;
}

.hero {
  position: relative;
  max-width: 74rem;
  margin: 0 auto;
  padding: clamp(5rem, 10vw, 9rem) clamp(2rem, 6vw, 5rem) 6.5rem;
}

.hero::after {
  position: absolute;
  z-index: -1;
  top: 11%;
  right: -15%;
  width: 32rem;
  height: 32rem;
  border: 1px solid rgba(168, 85, 247, 0.16);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(123, 44, 245, 0.2), transparent 67%);
  content: '';
  filter: blur(1px);
}

.hero-kicker {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.hero-kicker span {
  display: inline-block;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0.9rem var(--accent);
}

.hero h1 {
  max-width: 57rem;
  margin: 1.4rem 0 1.3rem;
  font-size: clamp(3rem, 7.5vw, 6.35rem);
  letter-spacing: -0.07em;
  line-height: 0.96;
}

.hero h1 em {
  background: linear-gradient(100deg, #c98cff, #7b2cf5 75%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-style: normal;
}

.hero > p {
  max-width: 45rem;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.2rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.55rem;
  padding: 0.75rem 1.05rem;
  font-size: 0.83rem;
  font-weight: 700;
  text-decoration: none;
}

.primary-button {
  background: linear-gradient(135deg, #a855f7, #6f22dc);
  box-shadow: 0 12px 30px rgba(123, 44, 245, 0.24);
  color: white;
}

.primary-button:hover {
  filter: brightness(1.09);
}

.secondary-button {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
}

.home-section,
.principles,
.home-cta {
  max-width: 74rem;
  margin: 0 auto;
}

.home-section {
  padding: 4.5rem clamp(2rem, 6vw, 5rem);
}

.section-heading {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 3rem;
  align-items: end;
  margin-bottom: 2rem;
}

.section-heading h2 {
  margin: 0.35rem 0 0;
  font-size: clamp(1.8rem, 4vw, 3rem);
  letter-spacing: -0.045em;
  line-height: 1.08;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.feature-card {
  position: relative;
  min-height: 15rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: linear-gradient(145deg, var(--surface), transparent);
  padding: 1.5rem;
  text-decoration: none;
  transition: 180ms ease;
}

.feature-card:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  background: var(--surface-hover);
}

.card-number {
  color: var(--accent-soft);
  font-size: 0.69rem;
  font-weight: 750;
}

.feature-card h2 {
  margin: 2.6rem 0 0.45rem;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}

.feature-card p {
  max-width: 28rem;
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.feature-card strong {
  display: block;
  margin-top: 1.1rem;
  color: var(--accent-soft);
  font-size: 0.76rem;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-block: 1px solid var(--line);
  background: linear-gradient(90deg, transparent, rgba(168, 85, 247, 0.04), transparent);
  padding: 3.5rem clamp(2rem, 6vw, 5rem);
}

.principles > div {
  padding: 0 1.5rem;
}

.principles > div:first-child {
  padding-left: 0;
}

.principles > div + div {
  border-left: 1px solid var(--line);
}

.principle-icon {
  display: grid;
  width: 2.15rem;
  height: 2.15rem;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 0.5rem;
  color: var(--accent-soft);
}

.principles h2 {
  margin: 1.2rem 0 0.4rem;
  font-size: 1rem;
}

.principles p {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.reference-section {
  padding-block: 6rem;
}

.reference-list {
  border-top: 1px solid var(--line);
}

.reference-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 1rem;
  font-weight: 600;
  padding: 1rem 0;
  text-decoration: none;
}

.reference-list a:hover {
  color: var(--accent-soft);
  padding-left: 0.5rem;
}

.home-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 5rem;
  border: 1px solid var(--line-strong);
  border-radius: 0.9rem;
  background: linear-gradient(120deg, rgba(123, 44, 245, 0.13), var(--surface));
  padding: 2rem clamp(1.5rem, 4vw, 3rem);
}

.home-cta h2 {
  margin: 0.25rem 0 0;
  font-size: clamp(1.3rem, 3vw, 2rem);
  letter-spacing: -0.035em;
}

.not-found {
  grid-column: 2 / -1;
  min-height: calc(100vh - var(--header-height));
}

.not-found .primary-button {
  margin-top: 2rem;
}

@media (max-width: 74rem) {
  .layout {
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  }

  .toc {
    display: none;
  }

  .home-content {
    grid-column: 2;
  }
}

@media (max-width: 52rem) {
  .topbar {
    padding: 0 1rem;
  }

  .search-trigger {
    min-width: 0;
    width: 2.4rem;
    height: 2.4rem;
    justify-content: center;
    padding: 0;
  }

  .search-trigger span:nth-child(2),
  .search-trigger kbd,
  .github-link {
    display: none;
  }

  .menu-button {
    display: grid;
  }

  .layout {
    display: block;
  }

  .sidebar {
    position: fixed;
    z-index: 40;
    top: var(--header-height);
    left: 0;
    width: min(20rem, 86vw);
    transform: translateX(-105%);
    background: var(--bg-elevated);
    box-shadow: var(--shadow);
    transition: transform 180ms ease;
  }

  .sidebar.is-open {
    transform: translateX(0);
  }

  .content {
    padding: 3.5rem 1.4rem 6rem;
  }

  .home-content {
    width: 100%;
  }

  .hero,
  .home-section,
  .principles {
    padding-inline: 1.4rem;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .feature-grid,
  .principles {
    grid-template-columns: 1fr;
  }

  .principles > div {
    padding: 1.5rem 0;
  }

  .principles > div:first-child {
    padding-top: 0;
  }

  .principles > div + div {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .home-cta {
    align-items: flex-start;
    margin: 0 1.4rem 3rem;
    flex-direction: column;
  }
}

@media (max-width: 34rem) {
  .brand .logo {
    width: 7rem;
  }

  .brand span {
    display: none;
  }

  .content h1 {
    font-size: 2.25rem;
  }

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

  .pager.next {
    grid-column: 1;
  }

  .hero h1 {
    font-size: 3.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}