:root {
  --reference-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

.reference-opening,
.reference-nav,
.reference-menu-backdrop,
.reference-mobile-menu {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body.reference-menu-open {
  overflow: hidden;
}

.reference-opening {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100vh;
  height: 100svh;
  overflow: hidden;
  background: #02030b url("starfield-blue.jpg") center / cover no-repeat;
  color: #fff;
}

.reference-opening__video {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.reference-opening__content {
  position: relative;
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 90px 20px 0;
  text-align: center;
}

.reference-opening__title {
  max-width: 48rem;
  margin: 0;
  color: #fff;
  font-family: var(--font-display, "PingFang SC", "Microsoft YaHei", sans-serif);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.04em;
  text-wrap: balance;
}

.reference-opening__subtitle {
  max-width: 44rem;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.6);
  font-family: var(--font-sans, "PingFang SC", "Microsoft YaHei", sans-serif);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.625;
  letter-spacing: 0;
  text-wrap: balance;
}

.reference-opening__button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 40px;
  margin-top: 0;
  padding: 10px 20px;
  border-radius: 9999px;
  background: #fff;
  color: #000;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.25rem;
  text-decoration: none;
  transition: opacity 180ms ease;
}

.reference-opening__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}

.reference-opening__button--secondary {
  border: 1px solid rgba(255, 255, 255, 0.34);
  background: rgba(7, 9, 22, 0.34);
  color: #fff;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.reference-opening__button:hover {
  opacity: 0.8;
}

.reference-opening__button svg {
  width: 15px;
  height: 15px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
  transition: transform 180ms ease;
}

.reference-opening__button:hover svg {
  transform: translateX(2px);
}

.reference-opening__desktop-break {
  display: none;
}

.reference-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid transparent;
  background: rgba(2, 5, 17, 0);
  color: #fff;
  -webkit-backdrop-filter: blur(0) saturate(100%);
  backdrop-filter: blur(0) saturate(100%);
  transition:
    padding 360ms var(--reference-ease),
    background-color 360ms ease,
    border-color 360ms ease,
    box-shadow 360ms ease,
    backdrop-filter 360ms ease;
}

.reference-nav.is-scrolled {
  border-bottom-color: rgba(154, 184, 255, 0.16);
  background: rgba(3, 7, 22, 0.82);
  box-shadow: 0 18px 54px rgba(0, 4, 18, 0.22);
  -webkit-backdrop-filter: blur(20px) saturate(135%);
  backdrop-filter: blur(20px) saturate(135%);
}

.reference-nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  text-decoration: none;
}

.reference-nav__brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  place-items: center;
  overflow: hidden;
  border-radius: 11px;
  background: #fff;
}

.reference-nav__brand-mark img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.reference-nav__brand-copy {
  display: block;
  color: #fff;
  font-family: var(--font-display, "PingFang SC", "Microsoft YaHei", sans-serif);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.reference-nav__brand-copy small {
  display: block;
  margin-top: 5px;
  color: rgba(255, 255, 255, 0.64);
  font-family: "Inter", sans-serif;
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.15em;
}

.reference-nav__desktop-links {
  display: none;
}

.reference-nav__actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.reference-nav__waitlist {
  display: none;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 8px 20px;
  border-radius: 9999px;
  background: #fff;
  color: #000;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.25rem;
  text-decoration: none;
  transition: opacity 180ms ease;
}

.reference-nav__waitlist:hover {
  opacity: 0.8;
}

.reference-nav__menu-toggle {
  position: relative;
  display: inline-flex;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 0;
  border-radius: 9999px;
  background: transparent;
  color: #fff;
  cursor: pointer;
  transition: background-color 300ms ease;
}

.reference-nav__menu-toggle svg {
  position: absolute;
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
  transition: opacity 300ms ease, transform 300ms ease;
}

.reference-nav__menu-icon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.reference-nav__close-icon {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

.reference-menu-open .reference-nav__menu-toggle {
  background: #1a1a1a;
}

.reference-menu-open .reference-nav__menu-icon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

.reference-menu-open .reference-nav__close-icon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.reference-menu-backdrop {
  position: fixed;
  inset: 0;
  z-index: 30;
  border: 0;
  background: rgba(0, 0, 0, 0);
  opacity: 0;
  pointer-events: none;
  -webkit-backdrop-filter: blur(0);
  backdrop-filter: blur(0);
  transition:
    opacity 500ms ease,
    background-color 500ms ease,
    -webkit-backdrop-filter 500ms ease,
    backdrop-filter 500ms ease;
}

.reference-menu-open .reference-menu-backdrop {
  background: rgba(0, 0, 0, 0.6);
  opacity: 1;
  pointer-events: auto;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.reference-mobile-menu {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  max-height: 0;
  overflow: hidden;
  padding: 0 20px;
  border-bottom: 1px solid transparent;
  background: rgba(8, 8, 8, 0.97);
  transition:
    max-height 500ms var(--reference-ease),
    padding 500ms var(--reference-ease),
    border-color 500ms ease;
}

.reference-menu-open .reference-mobile-menu {
  max-height: 420px;
  padding-top: 80px;
  padding-bottom: 24px;
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

.reference-mobile-menu__nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.reference-mobile-menu__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 46px;
  padding: 12px;
  border-radius: 12px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.25;
  text-decoration: none;
  opacity: 0;
  transform: translateY(-8px);
  transition:
    background-color 180ms ease,
    color 180ms ease,
    opacity 350ms ease calc(var(--menu-index, 0) * 50ms + 80ms),
    transform 350ms var(--reference-ease) calc(var(--menu-index, 0) * 50ms + 80ms);
}

.reference-menu-open .reference-mobile-menu__link {
  opacity: 1;
  transform: translateY(0);
}

.reference-mobile-menu__link:hover {
  background: rgba(255, 255, 255, 0.07);
  color: #fff;
}

.reference-mobile-menu__link svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.reference-mobile-menu__link:hover svg {
  opacity: 1;
  transform: translateX(0);
}

.reference-mobile-menu__cta-wrap {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  opacity: 0;
  transform: translateY(-8px);
  transition:
    opacity 350ms ease 360ms,
    transform 350ms var(--reference-ease) 360ms;
}

.reference-menu-open .reference-mobile-menu__cta-wrap {
  opacity: 1;
  transform: translateY(0);
}

.reference-mobile-menu__cta {
  display: flex;
  width: 100%;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 11px 20px;
  border-radius: 9999px;
  background: #fff;
  color: #000;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
}

/* The previous hero used a negative overlap on the following section. */
.reference-opening + .technology {
  margin-top: 0 !important;
}

@media (min-width: 640px) {
  .reference-opening__desktop-break {
    display: initial;
  }

  .reference-opening__subtitle {
    max-width: 44rem;
  }
}

@media (min-width: 768px) {
  .reference-opening__content {
    padding: 120px 32px 64px;
  }

  .reference-opening__subtitle {
    max-width: 44rem;
    margin-top: 24px;
    font-size: 1rem;
  }

  .reference-opening__actions {
    margin-top: 32px;
  }
}

@media (max-width: 479px) {
  .reference-nav__brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 10px;
  }

  .reference-nav__brand-mark img {
    width: 29px;
    height: 29px;
  }

  .reference-nav__brand-copy {
    font-size: 14px;
  }

  .reference-opening__content {
    padding-inline: 18px;
  }

  .reference-opening__title {
    font-size: clamp(2.25rem, 11.4vw, 3.1rem);
  }

  .reference-opening__subtitle {
    max-width: 23rem;
    font-size: 0.875rem;
    line-height: 1.8;
  }

  .reference-opening__actions {
    gap: 8px;
  }

  .reference-opening__button {
    min-height: 44px;
    padding-inline: 17px;
  }
}

@media (min-width: 1024px) {
  .reference-nav {
    padding: 24px 40px;
  }

  .reference-nav.is-scrolled {
    padding-block: 12px;
  }

  .reference-nav__desktop-links {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 8px;
    border-radius: 9999px;
    background: #0c0c0c;
  }

  .reference-nav__desktop-link {
    padding: 6px 16px;
    border-radius: 9999px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.25rem;
    text-decoration: none;
    transition: background-color 180ms ease, color 180ms ease;
  }

  .reference-nav__desktop-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
  }

  .reference-nav__waitlist {
    display: inline-flex;
  }

  .reference-nav__menu-toggle,
  .reference-menu-backdrop,
  .reference-mobile-menu {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reference-opening *,
  .reference-nav *,
  .reference-menu-backdrop,
  .reference-mobile-menu {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}