:root {
  color-scheme: dark;
  --bg: #030913;
  --bg-deep: #02070d;
  --surface: rgba(7, 24, 38, 0.8);
  --surface-strong: rgba(6, 19, 31, 0.96);
  --line: rgba(87, 232, 255, 0.22);
  --line-strong: rgba(87, 232, 255, 0.72);
  --cyan: #57e8ff;
  --teal: #23f4bd;
  --warning: #ffbd3e;
  --ink: #edfaff;
  --muted: #91acb9;
  --header-height: 74px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--bg);
  color: var(--ink);
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 70% 8%, rgba(35, 244, 189, 0.055), transparent 28%),
    linear-gradient(180deg, #030913, #02070d 68%, #030913);
}

button,
a {
  font: inherit;
}

button {
  color: inherit;
}

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

.technical-grid {
  position: fixed;
  z-index: -1;
  inset: 0;
  pointer-events: none;
  opacity: 0.34;
  background-image:
    linear-gradient(rgba(87, 232, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(87, 232, 255, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, #000 0 60%, transparent 95%);
}

.principle-header {
  position: relative;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(250px, 1fr) auto minmax(160px, 1fr);
  align-items: center;
  min-height: var(--header-height);
  padding: 0 clamp(22px, 3.2vw, 54px);
  border-bottom: 1px solid var(--line);
  background: rgba(2, 8, 15, 0.9);
  backdrop-filter: blur(16px);
}

.principle-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  justify-self: start;
}

.principle-brand img {
  width: 43px;
  height: 43px;
  object-fit: contain;
}

.principle-brand span {
  display: grid;
  gap: 2px;
}

.principle-brand strong {
  font-size: 15px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.principle-brand small {
  color: var(--cyan);
  font: 600 10px/1.2 ui-monospace, SFMono-Regular, Consolas, monospace;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.principle-nav {
  display: flex;
  align-self: stretch;
}

.principle-nav a {
  position: relative;
  display: grid;
  place-items: center;
  padding: 0 clamp(15px, 2vw, 31px);
  color: #c6d7de;
  font-size: 14px;
  white-space: nowrap;
}

.principle-nav a::after {
  position: absolute;
  right: 22%;
  bottom: -1px;
  left: 22%;
  height: 2px;
  content: "";
  transform: scaleX(0);
  background: var(--teal);
  transition: transform 180ms ease;
}

.principle-nav a:hover,
.principle-nav a:focus-visible,
.principle-nav a.active {
  color: var(--teal);
  outline: none;
}

.principle-nav a.active::after {
  transform: scaleX(1);
}

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  justify-self: end;
  padding: 7px 12px;
  border: 1px solid rgba(145, 172, 185, 0.4);
  border-radius: 4px;
  color: var(--muted);
}

.language-switch button {
  padding: 1px 3px;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font-size: 13px;
}

.language-switch button[aria-pressed="true"] {
  color: var(--teal);
  font-weight: 800;
}

.principle-index {
  width: min(1420px, calc(100% - 56px));
  margin: 0 auto;
  padding: clamp(38px, 5vw, 78px) 0 52px;
}

.principle-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(430px, 1.1fr);
  align-items: center;
  min-height: 245px;
  border-bottom: 1px solid var(--line);
}

.principle-hero h1 {
  max-width: 720px;
  margin: 0 0 24px;
  font: 500 clamp(42px, 5vw, 72px)/1.03 ui-monospace, SFMono-Regular, Consolas, monospace;
  letter-spacing: 0.015em;
}

.principle-hero h1::after {
  display: block;
  width: 94px;
  height: 3px;
  margin-top: 25px;
  content: "";
  background: var(--teal);
}

.principle-hero p {
  max-width: 680px;
  margin: 0;
  color: #a9bfca;
  font: 400 clamp(16px, 1.45vw, 21px)/1.65 ui-monospace, SFMono-Regular, Consolas, monospace;
}

.principle-hero img {
  justify-self: end;
  width: min(100%, 680px);
  max-height: 280px;
  object-fit: contain;
  opacity: 0.9;
  filter: brightness(1.55) saturate(0.8) contrast(1.12) drop-shadow(0 0 22px rgba(87, 232, 255, 0.13));
  mask-image: linear-gradient(90deg, transparent, #000 20% 82%, transparent);
}

.machine-categories {
  padding: 28px 0 20px;
}

.machine-category,
.future-categories {
  border: 1px solid var(--line);
  background: rgba(3, 14, 24, 0.48);
}

.category-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 58px;
  padding: 0 23px;
  border: 0;
  border-left: 4px solid var(--teal);
  background: transparent;
  color: var(--cyan);
  cursor: pointer;
  font: 700 19px/1.2 ui-monospace, SFMono-Regular, Consolas, monospace;
  letter-spacing: 0.03em;
}

.category-heading svg,
.explore-link svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 180ms ease;
}

.machine-category.is-open .category-heading svg {
  transform: rotate(180deg);
}

.category-content {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 240ms ease;
}

.machine-category.is-open .category-content {
  grid-template-rows: 1fr;
}

.category-content > * {
  overflow: hidden;
}

.machine-feature {
  display: grid;
  grid-template-columns: minmax(380px, 1.1fr) minmax(320px, 0.9fr);
  min-height: 360px;
  margin: 0 22px 22px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background:
    radial-gradient(circle at 24% 55%, rgba(25, 84, 111, 0.22), transparent 37%),
    rgba(2, 12, 21, 0.82);
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.machine-feature:hover,
.machine-feature:focus-visible {
  border-color: var(--teal);
  box-shadow: 0 0 34px rgba(35, 244, 189, 0.12);
  outline: none;
}

.machine-feature figure {
  display: grid;
  place-items: center;
  min-height: 0;
  margin: 0;
  padding: 28px;
}

.machine-feature figure img {
  width: 100%;
  height: 100%;
  max-height: 310px;
  object-fit: contain;
  filter: brightness(1.45) saturate(0.8) contrast(1.08) drop-shadow(0 22px 35px rgba(0, 0, 0, 0.5));
}

.machine-feature > div {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 42px clamp(32px, 4vw, 68px);
  border-left: 1px solid rgba(87, 232, 255, 0.14);
}

.machine-feature h2 {
  margin: 0 0 22px;
  font: 500 clamp(29px, 3vw, 46px)/1.1 ui-monospace, SFMono-Regular, Consolas, monospace;
}

.machine-feature h2::after {
  display: block;
  width: 58px;
  height: 2px;
  margin-top: 18px;
  content: "";
  background: var(--cyan);
}

.machine-feature p {
  max-width: 520px;
  margin: 0 0 30px;
  color: #a9bfca;
  font: 400 16px/1.65 ui-monospace, SFMono-Regular, Consolas, monospace;
}

.explore-link {
  display: inline-flex;
  align-items: center;
  gap: 24px;
  min-width: 188px;
  padding: 14px 20px 14px 27px;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font: 700 17px/1 ui-monospace, SFMono-Regular, Consolas, monospace;
}

.future-categories {
  margin-top: 12px;
}

.future-categories > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 53px;
  padding: 0 24px;
  border-bottom: 1px solid var(--line);
  border-left: 4px solid #6385a0;
  color: #91aac0;
  font: 500 16px/1.2 ui-monospace, SFMono-Regular, Consolas, monospace;
}

.future-categories > div:last-child {
  border-bottom: 0;
}

.future-categories small {
  color: #647d8b;
  font-size: 12px;
}

.precision-note {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 20px;
  padding: 18px 21px;
  border: 1px solid rgba(87, 232, 255, 0.18);
  color: var(--muted);
}

.precision-note svg {
  flex: 0 0 30px;
  width: 30px;
  height: 30px;
  fill: none;
  stroke: var(--cyan);
  stroke-width: 1.6;
}

.precision-note p {
  margin: 0;
  font: 400 13px/1.6 ui-monospace, SFMono-Regular, Consolas, monospace;
}

@media (max-width: 1040px) {
  .principle-header {
    backdrop-filter: none;
    grid-template-columns: 1fr auto;
  }

  .principle-nav {
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 50;
    justify-content: space-around;
    min-height: 62px;
    border-top: 1px solid var(--line);
    background: rgba(2, 8, 15, 0.97);
  }

  .principle-nav a {
    flex: 1;
    padding: 0 8px;
    font-size: 12px;
    text-align: center;
  }

  body {
    padding-bottom: 62px;
  }

  .principle-hero {
    grid-template-columns: 1fr;
  }

  .principle-hero img {
    display: none;
  }
}

@media (max-width: 760px) {
  :root {
    --header-height: 66px;
  }

  .principle-header {
    padding: 0 16px;
  }

  .principle-brand img {
    width: 38px;
    height: 38px;
  }

  .principle-brand strong {
    font-size: 12px;
  }

  .principle-brand small {
    font-size: 8px;
  }

  .language-switch {
    gap: 6px;
    padding: 6px 8px;
  }

  .principle-index {
    width: min(100% - 28px, 680px);
    padding-top: 34px;
  }

  .principle-hero {
    min-height: 210px;
  }

  .principle-hero h1 {
    font-size: clamp(35px, 11vw, 50px);
  }

  .principle-hero p {
    font-size: 15px;
  }

  .machine-feature {
    grid-template-columns: 1fr;
    margin: 0 10px 10px;
  }

  .machine-feature figure {
    min-height: 245px;
    padding: 18px 20px 0;
  }

  .machine-feature > div {
    padding: 26px 24px 30px;
    border-top: 1px solid rgba(87, 232, 255, 0.14);
    border-left: 0;
  }

  .machine-feature h2 {
    font-size: 30px;
  }

  .future-categories > div {
    padding: 0 16px;
    font-size: 14px;
  }

  .principle-nav a:nth-child(4) {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}