:root {
  color-scheme: dark;
  --switcher-height: 44px;
  --focus: #7ee8ff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: #050708;
  color: #fff;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  transform: translateY(-180%);
  border-radius: 4px;
  background: #fff;
  color: #000;
  font: 700 0.9rem/1 system-ui, sans-serif;
}

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

.concept-switcher {
  position: relative;
  z-index: 100;
  display: flex;
  min-height: var(--switcher-height);
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 7px clamp(14px, 3vw, 42px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  background: #111517;
  color: #e9eef0;
  font: 650 0.8rem/1.2 system-ui, sans-serif;
  letter-spacing: 0.02em;
}

.concept-switcher a {
  text-decoration: none;
}

.concept-switcher__home {
  white-space: nowrap;
}

.concept-switcher__home::before {
  content: "←";
  margin-right: 8px;
}

.concept-switcher__links {
  display: flex;
  align-items: center;
  gap: 7px;
}

.concept-switcher__links a {
  padding: 7px 10px;
  border-radius: 999px;
  color: #aeb8bd;
}

.concept-switcher__links a:hover,
.concept-switcher__links a[aria-current="page"] {
  background: #fff;
  color: #0a0c0d;
}

.concept-switcher__links span {
  margin-right: 4px;
  opacity: 0.7;
}

.hub {
  min-height: calc(100vh - var(--switcher-height));
  padding: clamp(44px, 8vw, 110px) clamp(18px, 5vw, 72px);
  background:
    radial-gradient(circle at 13% 5%, rgba(57, 183, 207, 0.22), transparent 34%),
    radial-gradient(circle at 88% 92%, rgba(255, 126, 64, 0.18), transparent 34%),
    #050708;
  font-family: Montserrat, "Helvetica Neue", Arial, sans-serif;
}

.hub__inner {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.hub__eyebrow {
  margin: 0 0 16px;
  color: #61c9db;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hub h1 {
  max-width: 860px;
  margin: 0;
  font-size: clamp(2.7rem, 7vw, 6.5rem);
  line-height: 0.94;
  letter-spacing: -0.05em;
  text-transform: uppercase;
}

.hub__lead {
  max-width: 700px;
  margin: 28px 0 0;
  color: #c5cdd1;
  font-family: Georgia, serif;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.6;
}

.hub__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: clamp(42px, 7vw, 80px);
}

.hub-card {
  position: relative;
  min-height: 390px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: #121719;
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease;
}

.hub-card:hover {
  transform: translateY(-6px);
  border-color: #fff;
}

.hub-card img {
  width: 100%;
  height: 205px;
  object-fit: cover;
  filter: saturate(0.75) contrast(1.08);
}

.hub-card__content {
  padding: 24px;
}

.hub-card__number {
  color: #61c9db;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.hub-card h2 {
  margin: 11px 0 12px;
  font-size: 1.35rem;
  text-transform: uppercase;
}

.hub-card p {
  margin: 0;
  color: #bdc6ca;
  font: 1rem/1.55 Georgia, serif;
}

.hub-card__open {
  display: inline-block;
  margin-top: 20px;
  color: #fff;
  font: 800 0.78rem/1 system-ui, sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

@media (max-width: 900px) {
  .hub__grid {
    grid-template-columns: 1fr;
  }

  .hub-card {
    display: grid;
    min-height: 0;
    grid-template-columns: minmax(180px, 0.8fr) 1fr;
  }

  .hub-card img {
    height: 100%;
    min-height: 280px;
  }
}

@media (max-width: 620px) {
  .concept-switcher {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  .concept-switcher__links {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .concept-switcher__links a {
    white-space: nowrap;
  }

  .hub-card {
    display: block;
  }

  .hub-card img {
    height: 220px;
    min-height: 0;
  }
}

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

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