@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Inter:wght@400;500&display=swap');

:root {
  --background: hsl(201 100% 13%);
  --foreground: #ffffff;
  --muted-foreground: rgba(255, 255, 255, 0.62);
  --font-display: 'Instrument Serif', 'Songti SC', 'STSong', 'Noto Serif SC', serif;
  --font-body: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--background);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

button {
  color: inherit;
  font: inherit;
}

.skip {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 16px;
  padding: 8px 12px;
  border-radius: 999px;
  background: #ffffff;
  color: #071016;
  font-size: 12px;
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

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

.hero {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  isolation: isolate;
  background: var(--background);
}

.hero-video {
  position: absolute;
  z-index: -2;
  inset: 0;
  width: 100%;
  height: 100%;
  background: var(--background);
  object-fit: cover;
  object-position: center center;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  min-height: 100svh;
  flex-direction: column;
}

.site-nav {
  display: grid;
  width: min(100%, 1320px);
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  margin: 0 auto;
  padding: 24px 32px;
}

.brand {
  display: inline-flex;
  width: fit-content;
  flex-direction: column;
  align-items: flex-start;
  line-height: 0.86;
}

.brand-name {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2vw, 1.82rem);
  font-weight: 400;
  letter-spacing: -0.045em;
  white-space: nowrap;
}

.brand-name sup {
  position: relative;
  top: -0.65em;
  margin-left: 0.12em;
  font-family: var(--font-body);
  font-size: 0.28em;
  font-weight: 500;
  letter-spacing: 0;
}

.brand-subtitle {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 8px;
  font-weight: 500;
  letter-spacing: 0.25em;
  line-height: 1;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(18px, 2.5vw, 38px);
  font-size: 11px;
  white-space: nowrap;
}

.nav-links a {
  color: var(--muted-foreground);
  transition: color 180ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links .active {
  color: var(--foreground);
}

.nav-cta {
  justify-self: end;
}

.glass-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  overflow: hidden;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.035);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.13);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  color: var(--foreground);
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease;
}

.glass-button::before {
  position: absolute;
  content: '';
  pointer-events: none;
  inset: 0;
  padding: 1.4px;
  border-radius: inherit;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.45) 0%,
    rgba(255, 255, 255, 0.15) 20%,
    rgba(255, 255, 255, 0) 40%,
    rgba(255, 255, 255, 0) 60%,
    rgba(255, 255, 255, 0.15) 80%,
    rgba(255, 255, 255, 0.45) 100%
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

.glass-button:hover,
.glass-button:focus-visible {
  background: rgba(255, 255, 255, 0.09);
  transform: scale(1.03);
}

.glass-button:focus-visible,
.nav-links a:focus-visible,
.text-button:focus-visible,
.brand:focus-visible {
  outline: 1px solid rgba(255, 255, 255, 0.85);
  outline-offset: 5px;
}

.nav-cta {
  min-height: 38px;
  padding: 0 20px;
  font-size: 11px;
}

.nav-cta span,
.hero-cta span {
  position: relative;
  top: -1px;
  font-size: 14px;
}

.hero-center {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 8vh 24px 15vh;
  text-align: center;
}

.eyebrow {
  margin: 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.3em;
  line-height: 1.2;
  text-transform: uppercase;
  animation: fade-rise 0.8s ease-out both;
}

.hero-title {
  max-width: 1160px;
  margin: 22px 0 0;
  font-family: var(--font-display);
  font-size: clamp(3.9rem, 7.15vw, 7.5rem);
  font-weight: 400;
  letter-spacing: -0.055em;
  line-height: 0.91;
  text-wrap: balance;
  text-shadow: 0 2px 24px rgba(0, 19, 28, 0.16);
  animation: fade-rise 0.8s ease-out both;
}

.hero-title em {
  color: rgba(255, 255, 255, 0.57);
  font-style: normal;
}

.hero-lead {
  max-width: 610px;
  margin: 26px auto 0;
  color: var(--muted-foreground);
  font-size: clamp(0.84rem, 1.2vw, 1rem);
  font-weight: 400;
  line-height: 1.75;
  text-shadow: 0 1px 12px rgba(0, 19, 28, 0.22);
  animation: fade-rise 0.8s ease-out 0.2s both;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 25px;
  margin-top: 38px;
  animation: fade-rise 0.8s ease-out 0.4s both;
}

.hero-cta {
  min-height: 52px;
  padding: 0 38px;
  font-size: 13px;
}

.text-button {
  color: rgba(255, 255, 255, 0.66);
  font-size: 12px;
  transition: color 180ms ease;
}

.text-button:hover,
.text-button:focus-visible {
  color: var(--foreground);
}

@keyframes fade-rise {
  from {
    opacity: 0;
    transform: translateY(24px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 860px) {
  .site-nav {
    grid-template-columns: 1fr auto;
  }

  .nav-links {
    display: none;
  }

  .hero-center {
    padding-top: 7vh;
    padding-bottom: 17vh;
  }

}

@media (max-width: 620px) {
  .site-nav {
    padding: 20px 18px;
  }

  .brand-name {
    font-size: 1.42rem;
  }

  .nav-cta {
    min-height: 34px;
    padding: 0 14px;
    font-size: 10px;
  }

  .hero-center {
    align-items: flex-start;
    padding: 12vh 18px 21vh;
    text-align: left;
  }

  .hero-title {
    max-width: 100%;
    font-size: clamp(3.45rem, 16vw, 5.6rem);
    text-wrap: pretty;
  }

  .hero-lead {
    max-width: 390px;
    margin-left: 0;
    font-size: 0.86rem;
    line-height: 1.7;
  }

  .hero-actions {
    gap: 18px;
    margin-top: 30px;
  }

  .hero-cta {
    min-height: 48px;
    padding: 0 26px;
  }

}

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

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