:root {
  --ink: #171817;
  --paper: #ffffff;
  --muted: #72746f;
  --line: #d7d8d3;
  --soft: #f5f6f3;
  --signal: #2857ff;
  --page: 1440px;
  --gutter: clamp(22px, 4.5vw, 72px);
  --space: clamp(90px, 11vw, 170px);
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
}

p,
h1,
h2,
h3,
figure {
  margin: 0;
}

a:focus-visible {
  outline: 1px solid currentColor;
  outline-offset: 5px;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: 12px;
  left: 12px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  background: var(--paper);
  font-size: 13px;
  transform: translateY(-160%);
}

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

.engineering-header,
.engineering-hero,
.capabilities,
.approach,
.engineering-contact,
.engineering-footer {
  width: min(100%, var(--page));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.engineering-header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 82px;
  font-size: 13px;
}

.brand {
  display: inline-flex;
  gap: 5px;
  align-items: center;
  width: fit-content;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.035em;
}

.brand__mark {
  display: block;
  width: 36px;
  height: 18px;
  object-fit: contain;
}

.language-menu {
  position: relative;
  justify-self: end;
}

.language-menu summary {
  display: flex;
  gap: 7px;
  align-items: center;
  min-width: 40px;
  justify-content: flex-end;
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  list-style: none;
}

.language-menu summary::-webkit-details-marker {
  display: none;
}

.language-menu summary:focus-visible {
  outline: 1px solid currentColor;
  outline-offset: 5px;
}

.language-menu__chevron {
  display: block;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(45deg);
  transition: transform 150ms ease;
}

.language-menu[open] .language-menu__chevron {
  margin-top: 3px;
  transform: rotate(225deg);
}

.language-menu__list {
  position: absolute;
  z-index: 5;
  top: calc(100% + 16px);
  right: -10px;
  display: grid;
  width: 156px;
  padding: 8px;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: 0 14px 36px rgba(28, 28, 26, 0.08);
}

.language-menu__list a {
  padding: 9px 10px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.25;
}

.language-menu__list a[aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}

.engineering-header a,
.engineering-contact a,
.engineering-footer a {
  transition: opacity 150ms ease;
}

.engineering-header a:hover,
.engineering-contact a:hover,
.engineering-footer a:hover {
  opacity: 0.55;
}

.language-menu__list a:hover {
  background: var(--soft);
  color: var(--ink);
  opacity: 1;
}

.label {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.engineering-hero {
  display: grid;
  grid-template-columns: minmax(150px, 0.42fr) minmax(0, 1.58fr);
  gap: var(--gutter);
  min-height: calc(100svh - 82px);
  padding-top: clamp(82px, 12vh, 150px);
  padding-bottom: clamp(48px, 7vh, 82px);
  border-top: 1px solid var(--line);
}

.engineering-hero h1 {
  grid-column: 1 / -1;
  align-self: center;
  max-width: 1240px;
  font-size: clamp(68px, 10vw, 148px);
  font-weight: 400;
  line-height: 0.9;
  letter-spacing: -0.075em;
}

html[data-language="ru"] .engineering-hero h1 {
  font-size: clamp(64px, 9vw, 132px);
}

html[data-language="kk"] .engineering-hero h1 {
  font-size: clamp(60px, 8.6vw, 126px);
}

.engineering-hero__copy {
  grid-column: 2;
  align-self: end;
  max-width: 660px;
  margin-left: auto;
  font-size: clamp(18px, 1.55vw, 23px);
  line-height: 1.48;
  letter-spacing: -0.025em;
}

.capabilities,
.approach,
.engineering-contact {
  padding-top: var(--space);
  padding-bottom: var(--space);
  border-top: 1px solid var(--line);
}

.section-heading,
.engineering-contact {
  display: grid;
  grid-template-columns: minmax(150px, 0.42fr) minmax(0, 1.58fr);
  gap: var(--gutter);
}

.section-heading {
  margin-bottom: clamp(72px, 9vw, 132px);
}

.section-heading h2,
.engineering-contact h2 {
  max-width: 1000px;
  font-size: clamp(46px, 6.4vw, 92px);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: -0.062em;
}

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

.capability {
  display: grid;
  grid-template-columns: 72px minmax(220px, 0.75fr) minmax(320px, 1.25fr) minmax(180px, 0.6fr);
  gap: clamp(22px, 3vw, 48px);
  align-items: start;
  padding-top: 32px;
  padding-bottom: 42px;
  border-bottom: 1px solid var(--line);
}

.capability__number,
.capability__scope {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

.capability h3 {
  font-size: clamp(21px, 2vw, 29px);
  font-weight: 400;
  line-height: 1.18;
  letter-spacing: -0.04em;
}

.capability > p:nth-of-type(2) {
  max-width: 620px;
  font-size: clamp(17px, 1.35vw, 20px);
  line-height: 1.52;
  letter-spacing: -0.02em;
}

.capability__scope {
  justify-self: end;
  text-align: right;
}

.approach__steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
}

.approach__steps article {
  min-height: 250px;
  padding: 30px clamp(24px, 3vw, 46px) 36px 0;
  border-right: 1px solid var(--line);
}

.approach__steps article + article {
  padding-left: clamp(24px, 3vw, 46px);
}

.approach__steps article:last-child {
  padding-right: 0;
  border-right: 0;
}

.approach__steps article > :last-child {
  max-width: 350px;
  margin-top: 74px;
  font-size: clamp(20px, 2vw, 28px);
  line-height: 1.35;
  letter-spacing: -0.035em;
}

.engineering-contact > div {
  display: grid;
  gap: clamp(76px, 10vw, 144px);
}

.engineering-contact__links {
  display: grid;
  gap: 22px;
}

.engineering-contact a {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: clamp(20px, 2.5vw, 36px);
  letter-spacing: -0.035em;
}

.engineering-contact__channel {
  display: inline-flex;
  gap: 14px;
  align-items: center;
  margin-left: auto;
  color: var(--muted);
  font-size: clamp(13px, 1.15vw, 17px);
  letter-spacing: 0;
  white-space: nowrap;
}

.contact-arrow {
  position: relative;
  display: block;
  flex: 0 0 auto;
  width: 0.62em;
  height: 0.62em;
  margin-right: 0.08em;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
}

.contact-arrow::after {
  position: absolute;
  top: -1px;
  right: -1px;
  width: 0.88em;
  height: 1px;
  background: currentColor;
  content: "";
  transform: rotate(-45deg);
  transform-origin: right center;
}

.engineering-footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 36px;
  align-items: center;
  min-height: 94px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 900px) {
  .capability {
    grid-template-columns: 52px minmax(180px, 0.8fr) minmax(0, 1.2fr);
  }

  .capability__scope {
    grid-column: 2 / -1;
    justify-self: start;
    text-align: left;
  }
}

@media (max-width: 760px) {
  .engineering-header {
    grid-template-columns: 1fr auto;
    min-height: 70px;
  }

  .engineering-header > p {
    display: none;
  }

  .brand__mark {
    width: 32px;
    height: 16px;
  }

  .engineering-hero,
  .section-heading,
  .engineering-contact {
    grid-template-columns: 1fr;
  }

  .engineering-hero {
    gap: 42px;
    min-height: calc(92svh - 70px);
    padding-top: 72px;
  }

  .engineering-hero h1,
  .engineering-hero__copy {
    grid-column: 1;
  }

  .engineering-hero h1 {
    font-size: clamp(58px, 18vw, 100px);
  }

  html[data-language="ru"] .engineering-hero h1 {
    font-size: clamp(48px, 13.5vw, 76px);
  }

  html[data-language="kk"] .engineering-hero h1 {
    font-size: clamp(44px, 12.2vw, 70px);
  }

  .engineering-hero__copy {
    margin-left: 0;
  }

  .section-heading,
  .engineering-contact {
    gap: 42px;
  }

  .capability {
    grid-template-columns: 42px 1fr;
    gap: 18px;
  }

  .capability > p:nth-of-type(2),
  .capability__scope {
    grid-column: 2;
  }

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

  .approach__steps article,
  .approach__steps article + article {
    min-height: 0;
    padding: 30px 0 42px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .approach__steps article:last-child {
    border-bottom: 0;
  }

  .approach__steps article > :last-child {
    margin-top: 42px;
  }

  .engineering-footer {
    grid-template-columns: 1fr;
    gap: 10px;
    padding-top: 30px;
    padding-bottom: 30px;
  }
}

@media (max-width: 420px) {
  .language-menu summary {
    font-size: 10px;
  }

  .language-menu__list {
    top: calc(100% + 14px);
    right: 0;
  }

  .engineering-contact h2 br {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}