@font-face {
  font-family: "DM Sans";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/dm-sans-latin-400-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "DM Sans";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/dm-sans-latin-500-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "DM Sans";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../fonts/dm-sans-latin-600-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Space Grotesk";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/space-grotesk-latin-400-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Space Grotesk";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../fonts/space-grotesk-latin-600-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --palette-neutral-0: #fafafa;
  --palette-neutral-50: #f5f5f5;
  --palette-neutral-100: #e5e5e5;
  --palette-neutral-600: #525252;
  --palette-neutral-700: #404040;
  --palette-neutral-900: #171717;
  --palette-neutral-950: #0a0a0a;
  --palette-surface: #ffffff;
  --motion-duration: 0.2s;

  --bg: var(--palette-neutral-0);
  --fg: var(--palette-neutral-900);
  --heading: var(--palette-neutral-950);
  --muted: var(--palette-neutral-600);
  --accent: var(--palette-neutral-950);
  --accent-2: var(--palette-neutral-700);
  --card: var(--palette-surface);
  --line: var(--palette-neutral-100);
  --radius: 10px;
  --shadow: 0 1px 2px #0000000a;
  --max: 1080px;
  --prose-max: 40rem;
  --text-base: 1rem;
  --leading-body: 1.55;
  --leading-heading: 1.12;
  --space-section-y: clamp(3.5rem, 8vw, 5.5rem);
  --space-block: 1rem;
  --focus-color: var(--palette-neutral-950);
  --font-sans: "DM Sans", "Segoe UI", "Hiragino Sans", "PingFang SC",
    "Microsoft YaHei", "Noto Sans CJK SC", "Apple SD Gothic Neo", "Malgun Gothic",
    sans-serif;
  --font-display: "Space Grotesk", "DM Sans", "Segoe UI", "Hiragino Sans",
    "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
  color-scheme: light;
  scroll-padding-top: 5rem;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
}

:lang(zh),
:lang(ja),
:lang(ko) {
  font-family: var(--font-sans);
}

:lang(el),
:lang(ru) {
  font-family: var(--font-sans);
}

:lang(he) {
  font-family: "Segoe UI", "Arial Hebrew", "Noto Sans Hebrew", sans-serif,
    var(--font-sans);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--motion-duration), border-color var(--motion-duration);
}

a:hover {
  color: var(--accent-2);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding-inline: clamp(16px, 4vw, 24px);
}

.skip-link {
  position: absolute;
  inset-inline-start: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  z-index: 200;
  padding: 12px 20px;
  border: none;
  background: var(--heading);
  color: #fff;
  font-weight: 700;
  font-family: inherit;
  font-size: inherit;
  border-radius: 0 0 var(--radius) var(--radius);
  cursor: pointer;
}

.skip-link:focus,
.skip-link:focus-visible {
  position: fixed;
  inset-inline-start: clamp(16px, 4vw, 24px);
  top: 0;
  width: auto;
  height: auto;
  overflow: visible;
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.top-banner {
  width: 100%;
  font-size: 0.875rem;
  text-align: center;
  background: var(--card);
  border-block-end: 1px solid var(--line);
  padding: 0.65rem clamp(16px, 4vw, 24px);
  color: var(--muted);
}

.top-banner a {
  font-weight: 600;
}

.site-header {
  position: sticky;
  inset-block-start: 0;
  background: var(--bg);
  border-block-end: 1px solid var(--line);
  z-index: 100;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-block: 12px;
}

.wordmark {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.03em;
  color: var(--heading);
  min-height: 44px;
  display: flex;
  align-items: center;
}

.lang-rail {
  margin-inline-start: auto;
  flex-shrink: 0;
  position: relative;
}

.lang-picker {
  position: relative;
}

.lang-picker__summary {
  list-style: none;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--accent);
}

.lang-picker__summary::-webkit-details-marker {
  display: none;
}

.lang-picker[open] .lang-picker__summary {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px #0a0a0a14;
}

.lang-picker__panel {
  position: absolute;
  inset-inline-end: 0;
  inset-block-start: calc(100% + 6px);
  z-index: 150;
  min-width: 13rem;
  max-height: min(70vh, 20rem);
  overflow-y: auto;
  margin: 0;
  padding: 6px;
  list-style: none;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  font-size: 0.85rem;
  font-weight: 600;
}

.lang-picker__panel > li {
  margin: 0;
}

.lang-picker__item {
  display: block;
  width: 100%;
  padding: 8px 10px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--fg);
  font: inherit;
  font-weight: 600;
  text-align: start;
  cursor: pointer;
}

.lang-picker__item:hover {
  background: var(--card);
}

.lang-picker__item[aria-current="true"] {
  color: var(--accent);
  background: var(--card);
}

h1,
h2 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.04em;
  color: var(--heading);
  line-height: var(--leading-heading);
}

h1 {
  font-size: clamp(1.85rem, 4vw + 0.55rem, 2.75rem);
  margin: 0 0 0.75rem;
}

h2 {
  font-size: clamp(1.25rem, 1.6vw + 0.55rem, 1.5rem);
  margin: 0 0 1.25rem;
  padding-block-end: 0.65rem;
  border-block-end: 1px solid var(--line);
}

.hero {
  padding: clamp(2.25rem, 6vw, 3.5rem) 0 clamp(2rem, 4vw, 2.75rem);
  border-block-end: 1px solid var(--line);
  background:
    radial-gradient(ellipse 70% 80% at 100% 10%, #0a0a0a0b, transparent 55%),
    linear-gradient(180deg, #f4f4f4 0%, var(--bg) 72%);
}

.hero-lead {
  margin: 0 0 1.25rem;
  max-width: var(--prose-max);
  font-size: clamp(1.02rem, 0.4vw + 0.95rem, 1.15rem);
  color: var(--muted);
}

.cta {
  margin: 0;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 20px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  background: transparent;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  transition: background var(--motion-duration), color var(--motion-duration),
    border-color var(--motion-duration);
  cursor: pointer;
  text-align: center;
}

.btn.primary {
  background: var(--accent);
  color: var(--bg);
}

.btn.primary:hover {
  background: var(--accent-2);
  border-color: var(--accent-2);
  color: var(--bg);
  text-decoration: none;
}

.btn.secondary {
  background: var(--card);
  color: var(--heading);
  border: 1px solid var(--line);
}

.btn.secondary:hover {
  border-color: var(--accent);
  background: var(--palette-neutral-50);
}

.content-section {
  padding-block: var(--space-section-y);
  border-block-end: 1px solid var(--line);
}

.content-section--first {
  padding-block-start: clamp(1.75rem, 4vw, 2.5rem);
}

.prose-block {
  max-width: var(--prose-max);
}

.prose-block p,
.prose-block ul {
  margin: 0 0 1rem;
}

.prose-block ul {
  padding-inline-start: 1.25rem;
}

.prose-block li {
  margin-block-end: 0.5rem;
}

.code-block {
  margin: 1rem 0 0;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
  font-family: ui-monospace, "Cascadia Code", "Segoe UI Mono", monospace;
  font-size: 0.88rem;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.release-list {
  margin: 0;
  padding: 0;
  list-style: none;
  max-width: var(--prose-max);
}

.release-list li {
  margin-block-end: 1.25rem;
  padding-block-end: 1.25rem;
  border-block-end: 1px solid var(--line);
}

.release-list li:last-child {
  margin-block-end: 0;
  padding-block-end: 0;
  border-block-end: none;
}

.release-list h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--heading);
}

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

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

.lang-picker__summary:focus-visible,
.lang-picker__item:focus-visible,
.btn:focus-visible,
.skip-link:focus-visible,
.top-banner a:focus-visible {
  outline: 2px solid var(--focus-color);
  outline-offset: 3px;
}

@media (min-width: 768px) {
  .lang-picker__panel {
    display: grid;
    grid-template-columns: repeat(2, minmax(9rem, 1fr));
    gap: 2px;
    max-height: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --motion-duration: 0.01ms;
  }

  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-color-scheme: dark) {
  html {
    color-scheme: dark;
  }

  :root {
    --palette-neutral-0: #0a0a0a;
    --palette-neutral-50: #171717;
    --palette-neutral-100: #262626;
    --palette-neutral-600: #d4d4d4;
    --palette-neutral-700: #e5e5e5;
    --palette-neutral-900: #fafafa;
    --palette-neutral-950: #ffffff;
    --palette-surface: #171717;
    --focus-color: var(--palette-neutral-900);
  }

  .hero {
    background:
      radial-gradient(ellipse 70% 80% at 100% 10%, #ffffff0a, transparent 55%),
      linear-gradient(180deg, #121212 0%, var(--bg) 72%);
  }

  .skip-link:focus,
  .skip-link:focus-visible {
    outline-color: var(--bg);
  }
}

.site-footer {
  margin-block-start: var(--space-section-y);
  border-block-start: 1px solid var(--line);
  background: var(--palette-neutral-50);
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

.site-footer__grid {
  display: grid;
  gap: 2.5rem;
  padding-block: 3rem 3.5rem;
}

@media (min-width: 768px) {
  .site-footer__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 2rem;
  }
}

.site-footer__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--heading);
}

.site-footer__blurb,
.site-footer__repo {
  margin: 0.75rem 0 0;
  max-width: 22rem;
}

.site-footer__repo a {
  font-weight: 500;
  color: var(--heading);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.site-footer__social {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-block-start: 1.25rem;
}

.site-footer__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--heading);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  box-shadow: var(--shadow);
}

.site-footer__social a:hover {
  border-color: var(--palette-neutral-600);
}

.site-footer__label {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--heading);
}

.site-footer__label--spaced {
  margin-block-start: 2rem;
}

.site-footer__links {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.site-footer__links li {
  margin-block-end: 0.5rem;
}

.site-footer__links a,
.top-banner a,
.site-footer a:not(.site-footer__social a) {
  color: var(--accent-2);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.site-footer__links a:hover {
  color: var(--heading);
}

.site-footer__company-name {
  margin: 0;
  font-weight: 600;
  color: var(--heading);
}

.site-footer__company p {
  margin: 0.35rem 0 0;
}

.site-footer__mit {
  margin-block-start: 1.25rem !important;
  max-width: 22rem;
  font-size: 0.85rem;
}

.site-footer a:focus-visible,
.site-footer__repo a:focus-visible,
.site-footer__social a:focus-visible {
  outline: 2px solid var(--focus-color);
  outline-offset: 3px;
}

@media (prefers-color-scheme: dark) {
  .site-footer {
    background: var(--palette-neutral-50);
  }
}

@media print {
  .skip-link,
  .lang-rail {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }
}