@import url("https://fonts.googleapis.com/css2?family=Geist:wght@300..800&family=Geist+Mono:wght@400..600&display=swap");

:root {
  --md-text-font: "Geist";
  --md-code-font: "Geist Mono";
  --hb-radius: 12px;
}

[data-md-color-scheme="slate"] {
  --md-hue: 0;
  --md-default-bg-color: #000000;
  --md-default-fg-color: #ededed;
  --md-default-fg-color--light: #a1a1a1;
  --md-default-fg-color--lighter: #666666;
  --md-default-fg-color--lightest: #1f1f1f;
  --md-typeset-color: #c9c9c9;
  --md-primary-fg-color: #000000;
  --md-primary-bg-color: #ededed;
  --md-primary-bg-color--light: #a1a1a1;
  --md-accent-fg-color: #ffffff;
  --md-typeset-a-color: #ededed;
  --md-code-bg-color: #0a0a0a;
  --md-code-fg-color: #ededed;
  --md-footer-bg-color: #000000;
  --md-footer-bg-color--dark: #000000;
  --md-footer-fg-color: #a1a1a1;
  --md-footer-fg-color--light: #666666;
  --md-footer-fg-color--lighter: #444444;
  --hb-heading: #ededed;
  --hb-border: #1f1f1f;
  --hb-border-strong: #333333;
  --hb-surface: #0a0a0a;
  --hb-hover: #111111;
  --hb-grid-line: rgba(255, 255, 255, 0.06);
  --hb-primary-bg: #ededed;
  --hb-primary-fg: #0a0a0a;
  --hb-headline: linear-gradient(180deg, #ffffff 30%, #8f8f8f);
}

[data-md-color-scheme="default"] {
  --md-default-bg-color: #ffffff;
  --md-default-fg-color: #171717;
  --md-default-fg-color--light: #4d4d4d;
  --md-default-fg-color--lighter: #8f8f8f;
  --md-default-fg-color--lightest: #eaeaea;
  --md-typeset-color: #333333;
  --md-primary-fg-color: #ffffff;
  --md-primary-bg-color: #171717;
  --md-primary-bg-color--light: #4d4d4d;
  --md-accent-fg-color: #000000;
  --md-typeset-a-color: #171717;
  --md-code-bg-color: #fafafa;
  --md-code-fg-color: #171717;
  --md-footer-bg-color: #ffffff;
  --md-footer-bg-color--dark: #ffffff;
  --md-footer-fg-color: #4d4d4d;
  --md-footer-fg-color--light: #8f8f8f;
  --md-footer-fg-color--lighter: #a1a1a1;
  --hb-heading: #000000;
  --hb-border: #eaeaea;
  --hb-border-strong: #d4d4d4;
  --hb-surface: #fafafa;
  --hb-hover: #f5f5f5;
  --hb-grid-line: rgba(0, 0, 0, 0.05);
  --hb-primary-bg: #171717;
  --hb-primary-fg: #ffffff;
  --hb-headline: linear-gradient(180deg, #000000 30%, #666666);
}

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: rgba(127, 127, 127, 0.3);
}

.md-grid {
  max-width: 80rem;
}

.md-header {
  background-color: var(--md-default-bg-color);
  box-shadow: none;
  border-bottom: 1px solid var(--hb-border);
}

.md-header--shadow {
  box-shadow: none;
}

.md-header__title {
  font-weight: 600;
  letter-spacing: -0.01em;
}

.md-header__button.md-logo img {
  height: 1.15rem;
}

[data-md-color-scheme="default"] .md-header__button.md-logo img {
  filter: invert(1);
}

.md-search__form {
  height: 1.8rem;
  border: 1px solid var(--hb-border-strong);
  border-radius: 8px;
  background-color: var(--md-default-bg-color);
  box-shadow: none;
}

.md-search__form:hover {
  background-color: var(--hb-surface);
}

.md-search__input {
  font-size: 0.7rem;
}

.md-search__input::placeholder {
  color: var(--md-default-fg-color--lighter);
}

.md-main__inner {
  margin-top: 1.2rem;
}

.md-sidebar__scrollwrap {
  scrollbar-color: var(--hb-border-strong) transparent;
}

.md-nav {
  font-size: 0.68rem;
}

.md-nav__title {
  background: transparent;
  box-shadow: none;
  color: var(--md-default-fg-color--lighter);
  font-weight: 500;
}

.md-nav__link {
  color: var(--md-default-fg-color--light);
  transition: color 0.15s;
}

.md-nav__link:hover,
.md-nav__link:focus {
  color: var(--md-default-fg-color);
}

.md-nav__link--active,
.md-nav__item .md-nav__link--active {
  color: var(--hb-heading);
  font-weight: 600;
}

.md-typeset {
  font-size: 0.8rem;
  line-height: 1.75;
  color: var(--md-typeset-color);
}

.md-typeset h1,
.md-typeset h2,
.md-typeset h3 {
  color: var(--hb-heading);
  letter-spacing: -0.03em;
}

.md-typeset h1 {
  font-weight: 700;
  font-size: 2.25em;
  letter-spacing: -0.045em;
}

.md-typeset h1 .headerlink {
  display: none;
}

.md-typeset h2 {
  font-weight: 600;
  margin-top: 2.4em;
  padding-bottom: 0.4em;
  border-bottom: 1px solid var(--hb-border);
}

.md-typeset h3 {
  font-weight: 600;
}

.md-typeset strong {
  color: var(--hb-heading);
}

.md-typeset a {
  color: var(--hb-heading);
  text-decoration: underline;
  text-decoration-color: var(--hb-border-strong);
  text-underline-offset: 0.22em;
  transition: text-decoration-color 0.15s;
}

.md-typeset a:hover {
  color: var(--hb-heading);
  text-decoration-color: currentColor;
}

.md-typeset .headerlink {
  text-decoration: none;
  color: var(--md-default-fg-color--lighter);
}

.md-typeset code {
  border-radius: 6px;
  font-size: 0.86em;
}

.md-typeset :not(pre) > code {
  padding: 0.1em 0.35em;
  border: 1px solid var(--hb-border);
}

.md-typeset pre > code {
  border: 1px solid var(--hb-border);
  border-radius: var(--hb-radius);
}

.md-typeset ul li::marker {
  color: var(--md-default-fg-color--lighter);
}

.md-typeset img[src*="figures/"] {
  border-radius: var(--hb-radius);
  background: #ffffff;
  padding: 0.6rem;
  border: 1px solid var(--hb-border);
}

[data-md-color-scheme="slate"] .md-typeset img[src*="formulas/"] {
  filter: invert(1);
  mix-blend-mode: screen;
}

.md-typeset img[src*="formulas/"] {
  display: block;
  margin: 0.6em 0;
}

.md-footer-meta {
  border-top: 1px solid var(--hb-border);
}

.md-footer__inner {
  border-top: 1px solid var(--hb-border);
}

.md-copyright {
  color: var(--md-default-fg-color--lighter);
}

.hb-icon {
  display: inline-flex;
  width: 1.1em;
  height: 1.1em;
  flex: none;
}

.hb-icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.md-content:has(.hb-hero) .md-content__inner {
  max-width: 62rem;
  margin-left: auto;
  margin-right: auto;
}

.md-typeset .hb-heading {
  text-align: center;
}

.md-typeset .hb-subheading {
  text-align: center;
  margin-bottom: 2rem;
}

.hb-prose {
  max-width: 46rem;
  margin: 0 auto 2rem;
}

.md-typeset .hb-prose h2 {
  text-align: center;
  border-bottom: none;
  font-size: 1.6em;
  letter-spacing: -0.04em;
}

.md-typeset .hb-prose h2 + p {
  text-align: center;
  color: var(--md-default-fg-color--light);
}

.hb-hero {
  position: relative;
  margin: 0 0 3.5rem;
  padding: 5rem 0 0;
  text-align: center;
}

.hb-hero__grid {
  position: absolute;
  inset: -1.2rem 0 30% 0;
  background-image:
    linear-gradient(var(--hb-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--hb-grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: center top;
  mask-image: radial-gradient(ellipse 55% 70% at 50% 20%, black, transparent);
  -webkit-mask-image: radial-gradient(ellipse 55% 70% at 50% 20%, black, transparent);
  pointer-events: none;
}

.hb-hero > *:not(.hb-hero__grid) {
  position: relative;
}

.hb-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  margin: 0 0 1.8rem;
  padding: 0.3em 0.9em;
  border: 1px solid var(--hb-border-strong);
  border-radius: 999px;
  background: var(--md-default-bg-color);
  font-size: 0.68rem;
  color: var(--md-default-fg-color--light);
}

.hb-pill__dot {
  width: 0.45em;
  height: 0.45em;
  border-radius: 50%;
  background: var(--hb-heading);
  animation: hb-pulse 2.4s ease-in-out infinite;
}

.md-typeset .hb-hero__title {
  margin: 0 auto;
  max-width: 14em;
  font-size: clamp(2.6rem, 7.5vw, 5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.06em;
  background: var(--hb-headline);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hb-hero__lead {
  max-width: 38rem;
  margin: 1.6rem auto 2.2rem;
  font-size: 1.02rem;
  line-height: 1.7;
  color: var(--md-default-fg-color--light);
}

.hb-hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.md-typeset .hb-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  height: 2.4rem;
  padding: 0 1.15em;
  border: 1px solid var(--hb-border-strong);
  border-radius: 8px;
  background: var(--md-default-bg-color);
  color: var(--hb-heading);
  font-size: 0.74rem;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s, opacity 0.15s;
}

.md-typeset .hb-button:hover {
  background: var(--hb-hover);
  color: var(--hb-heading);
}

.md-typeset .hb-button--primary {
  border-color: var(--hb-primary-bg);
  background: var(--hb-primary-bg);
  color: var(--hb-primary-fg);
}

.md-typeset .hb-button--primary:hover {
  background: var(--hb-primary-bg);
  color: var(--hb-primary-fg);
  opacity: 0.88;
}

.hb-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 4.5rem;
  border: 1px solid var(--hb-border);
  border-radius: var(--hb-radius);
  background: var(--hb-border);
  overflow: hidden;
  text-align: left;
}

.hb-stat {
  padding: 1.3rem 1.4rem;
  background: var(--md-default-bg-color);
}

.hb-stat strong {
  display: block;
  font-size: 1.9rem;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.04em;
  color: var(--hb-heading);
}

.hb-stat span {
  font-family: var(--md-code-font-family);
  font-size: 0.64rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--md-default-fg-color--lighter);
}

.md-typeset .hb-heading {
  margin: 0 0 0.3rem;
  padding: 0;
  border-bottom: none;
  font-size: 1.6em;
  letter-spacing: -0.04em;
}

.md-typeset .hb-subheading {
  margin: 0 0 1.4rem;
  color: var(--md-default-fg-color--light);
}

.hb-grid {
  display: grid;
  gap: 1px;
  margin: 0 0 4rem;
  border: 1px solid var(--hb-border);
  border-radius: var(--hb-radius);
  overflow: hidden;
}

.hb-grid--parts {
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 13.5rem), 1fr));
}

.hb-grid--features {
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 1fr));
}

.hb-grid--topics {
  grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
  margin-top: 1.4rem;
}

.md-typeset .hb-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.4rem;
  outline: 1px solid var(--hb-border);
  background: var(--md-default-bg-color);
  color: var(--md-typeset-color);
  text-decoration: none;
  transition: background 0.15s;
}

.md-typeset a.hb-card:hover {
  background: var(--hb-surface);
  color: var(--md-typeset-color);
}

.md-typeset .hb-card > .hb-icon {
  width: 2.1rem;
  height: 2.1rem;
  margin-bottom: 0.4rem;
  padding: 0.45rem;
  border: 1px solid var(--hb-border-strong);
  border-radius: 8px;
  color: var(--hb-heading);
}

.hb-card__title {
  display: flex;
  align-items: center;
  gap: 0.4em;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--hb-heading);
}

.hb-card__title .hb-icon {
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.15s, transform 0.15s;
}

.md-typeset a.hb-card:hover .hb-card__title .hb-icon {
  opacity: 1;
  transform: none;
}

.hb-card__text {
  flex: 1;
  font-size: 0.72rem;
  line-height: 1.6;
  color: var(--md-default-fg-color--light);
}

.hb-card__meta {
  font-family: var(--md-code-font-family);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--md-default-fg-color--lighter);
}

.hb-progress {
  height: 2px;
  margin-top: 0.6rem;
  background: var(--hb-border-strong);
  overflow: hidden;
}

.hb-progress span {
  display: block;
  height: 100%;
  background: var(--hb-heading);
}

.hb-part-summary {
  display: grid;
  gap: 0.5rem;
  max-width: 24rem;
  margin: 1.8rem 0 0;
  font-family: var(--md-code-font-family);
  font-size: 0.64rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--md-default-fg-color--lighter);
}

.hb-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  align-self: flex-start;
  margin-top: 0.4rem;
  padding: 0.15em 0.6em;
  border: 1px solid var(--hb-border-strong);
  border-radius: 999px;
  font-family: var(--md-code-font-family);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--md-default-fg-color--lighter);
}

.hb-badge--ready {
  border-color: var(--hb-primary-bg);
  background: var(--hb-primary-bg);
  color: var(--hb-primary-fg);
}

.md-typeset .hb-topic--planned .hb-card__title,
.md-typeset .hb-topic--planned .hb-card__text {
  color: var(--md-default-fg-color--lighter);
}

@keyframes hb-pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.3;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hb-pill__dot {
    animation: none;
  }
  .md-typeset .hb-card,
  .md-typeset .hb-button,
  .hb-card__title .hb-icon {
    transition: none;
  }
}

@media screen and (max-width: 44.9em) {
  .hb-hero {
    padding-top: 3rem;
  }
  .hb-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}