:root {
  color-scheme: dark;
  --night: #07131d;
  --night-deep: #03090e;
  --snow: #f2f7f8;
  --ice: #8ddceb;
  --amber: #e0a44a;
  --muted: #a7bac4;
  --line: rgba(216, 237, 244, 0.22);
  --display: "Arial Narrow", "Roboto Condensed", "Helvetica Neue", sans-serif;
  --body: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--night-deep);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--night);
  color: var(--snow);
  font-family: var(--body);
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 10;
  padding: 0.7rem 1rem;
  background: var(--snow);
  color: var(--night-deep);
  font-weight: 700;
  transform: translateY(-150%);
}

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

.review-header {
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem clamp(1.25rem, 4vw, 4.5rem);
  border-bottom: 1px solid var(--line);
  background: var(--night-deep);
}

.review-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
}

.review-mark small,
.review-mark strong {
  display: block;
}

.review-mark small {
  margin-bottom: 0.12rem;
  color: var(--amber);
  font-size: 0.69rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.review-mark strong {
  font-family: var(--display);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

.track-mark {
  position: relative;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 50%;
  transform: rotate(-13deg);
}

.track-mark i {
  position: absolute;
  top: 7px;
  bottom: 7px;
  width: 3px;
  border-radius: 2px;
  background: var(--snow);
}

.track-mark i:first-child {
  left: 15px;
}

.track-mark i:last-child {
  right: 15px;
}

.review-header > p {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.live-dot {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: #69e3a6;
  box-shadow: 0 0 0 0.22rem rgba(105, 227, 166, 0.16);
}

.intro {
  display: grid;
  grid-template-columns: minmax(11rem, 0.65fr) minmax(22rem, 1.6fr) minmax(18rem, 1fr);
  align-items: end;
  gap: clamp(1rem, 3vw, 3rem);
  padding: clamp(2.5rem, 6vw, 5.75rem) clamp(1.25rem, 4vw, 4.5rem) clamp(2rem, 4vw, 3.5rem);
  background: var(--night);
}

.intro-label {
  margin: 0 0 0.45rem;
  color: var(--ice);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.intro h1 {
  max-width: 12ch;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(3.25rem, 7vw, 6rem);
  line-height: 0.86;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  text-wrap: balance;
}

.intro > p:last-child {
  max-width: 34rem;
  margin: 0 0 0.25rem;
  color: var(--muted);
  font-size: clamp(1rem, 1.6vw, 1.18rem);
  line-height: 1.55;
}

.concepts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 660px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.concept {
  position: relative;
  isolation: isolate;
  min-height: 660px;
  overflow: hidden;
  background-position: center;
  background-size: cover;
  text-decoration: none;
}

.concept:first-child {
  border-right: 1px solid rgba(242, 247, 248, 0.45);
}

.concept-a {
  background-image: url("./v1-a/images/hero.jpg");
}

.concept-b {
  background-image: url("./v1-b/assets/ghostline-hero.jpg");
}

.concept::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: inherit;
  background-position: center;
  background-size: cover;
  transition: transform 700ms cubic-bezier(0.16, 1, 0.3, 1), filter 700ms cubic-bezier(0.16, 1, 0.3, 1);
}

.concept-shade {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(3, 9, 14, 0.14) 0%, rgba(3, 9, 14, 0.5) 48%, rgba(3, 9, 14, 0.96) 100%);
  transition: background 500ms ease-out;
}

.concept-content {
  min-height: 660px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  align-items: end;
  padding: clamp(1.4rem, 4vw, 4rem);
}

.version {
  align-self: start;
  justify-self: start;
  padding: 0.62rem 0.78rem;
  border: 1px solid rgba(242, 247, 248, 0.48);
  background: rgba(3, 9, 14, 0.72);
  color: var(--snow);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.concept-copy {
  align-self: end;
  display: block;
  max-width: 36rem;
  margin-bottom: clamp(2.2rem, 5vw, 4rem);
}

.concept-copy strong,
.concept-copy > span {
  display: block;
}

.concept-copy strong {
  max-width: 9ch;
  margin-bottom: 1.1rem;
  font-family: var(--display);
  font-size: clamp(3rem, 6vw, 5.6rem);
  line-height: 0.88;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  text-wrap: balance;
}

.concept-copy > span {
  max-width: 52ch;
  color: #dbe8ec;
  font-size: clamp(1rem, 1.35vw, 1.12rem);
  line-height: 1.55;
}

.open-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(242, 247, 248, 0.58);
  font-size: 0.82rem;
  font-weight: 850;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.open-action b {
  display: grid;
  width: 2.3rem;
  height: 2.3rem;
  place-items: center;
  border-radius: 50%;
  background: var(--snow);
  color: var(--night-deep);
  font-size: 1rem;
  transition: transform 350ms cubic-bezier(0.16, 1, 0.3, 1), background 350ms ease-out;
}

.concept:hover::before,
.concept:focus-visible::before {
  transform: scale(1.035);
  filter: saturate(1.08) contrast(1.04);
}

.concept:hover .concept-shade,
.concept:focus-visible .concept-shade {
  background: linear-gradient(180deg, rgba(3, 9, 14, 0.08) 0%, rgba(3, 9, 14, 0.4) 44%, rgba(3, 9, 14, 0.92) 100%);
}

.concept:hover .open-action b,
.concept:focus-visible .open-action b {
  transform: translate(0.18rem, -0.18rem);
  background: var(--amber);
}

.concept:focus-visible {
  outline: 4px solid var(--ice);
  outline-offset: -4px;
}

.review-footer {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.5rem clamp(1.25rem, 4vw, 4.5rem);
  background: var(--night-deep);
  color: var(--muted);
  font-size: 0.79rem;
  line-height: 1.55;
}

.review-footer p {
  margin: 0;
}

.review-footer p:first-child {
  max-width: 66rem;
}

.review-footer strong {
  color: var(--snow);
}

@media (max-width: 900px) {
  .intro {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .intro h1 {
    max-width: 10ch;
  }

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

  .concept:first-child {
    border-right: 0;
    border-bottom: 1px solid rgba(242, 247, 248, 0.45);
  }
}

@media (max-width: 600px) {
  .review-header {
    min-height: 76px;
  }

  .review-header > p {
    max-width: 7rem;
    justify-content: flex-end;
    text-align: right;
    line-height: 1.35;
  }

  .track-mark {
    display: none;
  }

  .intro {
    padding-top: 3.25rem;
    padding-bottom: 2.5rem;
  }

  .intro h1 {
    font-size: clamp(3.4rem, 17vw, 5rem);
  }

  .concept,
  .concept-content {
    min-height: 600px;
  }

  .concept-content {
    padding: 1.35rem;
  }

  .concept-copy strong {
    font-size: clamp(3.6rem, 17vw, 5rem);
  }

  .review-footer {
    display: grid;
    gap: 1rem;
  }
}

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

  .concept::before,
  .concept-shade,
  .open-action b {
    transition: none;
  }
}