:root {
  --bg: #000000;
  --surface: #050505;
  --surface-2: #111111;
  --surface-3: #171717;
  --text: #ffffff;
  --muted: rgba(255, 255, 255, 0.72);
  --faint: rgba(255, 255, 255, 0.48);
  --line: rgba(255, 255, 255, 0.14);
  --line-strong: rgba(255, 255, 255, 0.34);
  --max: 1320px;
  --content: 980px;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

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

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.65;
  scroll-behavior: smooth;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 120px 120px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.55), transparent 88%);
  pointer-events: none;
  opacity: 0.32;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 15% 18%, rgba(255, 255, 255, 0.08), transparent 24%),
    radial-gradient(circle at 82% 16%, rgba(255, 255, 255, 0.05), transparent 20%);
  pointer-events: none;
  opacity: 0.55;
}

a {
  color: inherit;
}

p,
li,
h1,
h2,
h3,
h4,
strong,
span,
code {
  min-width: 0;
}

p,
li {
  overflow-wrap: anywhere;
}

.wrap {
  width: min(var(--max), calc(100vw - 48px));
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.wrap.narrow {
  width: min(var(--content), calc(100vw - 48px));
}

header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 20;
  mix-blend-mode: difference;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 0;
}

.brand,
.mini-nav,
.lang-switch button,
.section-label,
.eyebrow,
.meta-line,
.card h3,
.list-heading,
.flow-label,
.button-label,
.footer-note,
.text-code {
  font-family: var(--font-mono);
}

.brand {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mini-nav {
  display: inline-flex;
  gap: 12px;
  flex-wrap: wrap;
}

.mini-nav a {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--faint);
}

.lang-switch {
  display: inline-flex;
  gap: 8px;
}

.lang-switch button {
  border: 1px solid rgba(255, 255, 255, 0.55);
  background: transparent;
  color: var(--text);
  padding: 10px 14px;
  border-radius: 0;
  cursor: pointer;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: background-color 0.25s ease, color 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}

.lang-switch button.active {
  background: var(--text);
  color: #000;
  border-color: var(--text);
}

.lang-switch button:hover {
  transform: translateY(-2px);
}

main {
  padding-top: 24px;
  position: relative;
  z-index: 1;
}

section {
  padding: 92px 0;
  border-top: 1px solid var(--line);
  position: relative;
}

.hero {
  min-height: calc(100vh - 40px);
  padding: 128px 0 72px;
  border-top: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.section-label {
  display: block;
  margin-bottom: 24px;
  color: var(--faint);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow {
  margin: 0 0 20px;
  color: var(--faint);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 24px;
  font-size: clamp(52px, 8vw, 132px);
  line-height: 0.92;
  letter-spacing: -0.055em;
  font-weight: 200;
  max-width: 10.8ch;
}

h2 {
  margin: 0 0 20px;
  font-size: clamp(30px, 4.2vw, 60px);
  line-height: 1.02;
  letter-spacing: -0.04em;
  font-weight: 300;
  max-width: 16ch;
}

.lead {
  margin: 0 0 44px;
  max-width: 52rem;
  font-size: clamp(19px, 2vw, 28px);
  line-height: 1.72;
  color: var(--muted);
}

.sub {
  margin: 0 0 34px;
  max-width: 58rem;
  color: var(--muted);
  line-height: 1.8;
}

.meta-line {
  margin: 0 0 14px;
  color: var(--faint);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.grid-2,
.grid-3,
.button-grid {
  display: grid;
  gap: 18px;
}

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

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

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

.card,
.panel,
.cta,
.flow,
.callout {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 24px;
  min-width: 0;
  transition: transform 0.3s ease, border-color 0.3s ease, background-color 0.3s ease;
}

.panel,
.cta {
  padding: 32px;
}

.card:hover,
.panel:hover,
.cta:hover,
.button:hover,
.flow:hover,
.callout:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.92);
  background: var(--surface-2);
}

.card h3,
.card h4,
.list-heading {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.card p,
.card li,
.panel p,
.cta p,
.callout p {
  color: var(--muted);
}

.stack {
  display: grid;
  gap: 18px;
}

.stack.tight {
  gap: 12px;
}

.simple-list,
.line-list {
  margin: 0;
  padding-left: 0;
  list-style: none;
}

.simple-list li {
  padding: 8px 0;
}

.line-list li {
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.line-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.flow {
  padding: 26px;
}

.flow pre {
  margin: 0;
  white-space: pre-wrap;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.7;
}

.flow-label {
  margin: 0 0 14px;
  color: var(--faint);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.button {
  display: inline-grid;
  gap: 6px;
  width: fit-content;
  min-width: 248px;
  border: 1px solid var(--line-strong);
  background: var(--surface-2);
  color: var(--text);
  text-decoration: none;
  padding: 16px 18px;
  border-radius: 4px;
  transition: transform 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.02);
  border-color: var(--line);
}

.button-label {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.button-meta {
  color: var(--faint);
  font-size: 13px;
  line-height: 1.5;
}

.text-code {
  display: inline-block;
  padding: 10px 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.lang {
  display: none;
}

.lang.active {
  display: block;
}

footer {
  padding: 24px 0 68px;
  border-top: 1px solid var(--line);
}

.footer-note {
  color: var(--faint);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

a:focus-visible,
button:focus-visible {
  outline: 1px solid var(--text);
  outline-offset: 3px;
}

@media (max-width: 1080px) {
  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-actions {
    width: 100%;
    justify-content: space-between;
    flex-wrap: wrap;
  }

  .grid-2,
  .grid-3,
  .button-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 132px;
  }

  section {
    padding: 72px 0;
  }
}

@media (max-width: 640px) {
  .wrap,
  .wrap.narrow {
    width: min(var(--max), calc(100vw - 28px));
  }

  .hero {
    padding-top: 116px;
  }

  section {
    padding: 58px 0;
  }

  h1 {
    max-width: 100%;
  }

  .lead,
  .sub {
    font-size: 16px;
  }

  .button {
    min-width: 100%;
  }
}