:root {
  color-scheme: dark;
  --background: #030d10;
  --surface: rgba(17, 31, 36, 0.86);
  --surface-strong: #12252a;
  --line: rgba(216, 255, 234, 0.13);
  --text: #f5fbf8;
  --muted: #a4b3b0;
  --accent: #4ee888;
  --accent-strong: #21cbb0;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  --radius: 28px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Hiragino Sans", "Yu Gothic", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -12%, rgba(29, 214, 116, 0.23), transparent 34rem),
    linear-gradient(180deg, #061719 0%, var(--background) 48%, #020708 100%);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration-color: rgba(78, 232, 136, 0.7);
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--accent);
}

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

.shell {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid transparent;
  background: rgba(3, 13, 16, 0.76);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-decoration: none;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  box-shadow: 0 8px 26px rgba(38, 215, 112, 0.2);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 0.9rem;
}

.nav-links a {
  text-decoration: none;
}

.nav-links .language-link {
  flex: none;
  padding: 5px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  font-weight: 800;
  white-space: nowrap;
}

.nav-links .language-link:hover,
.nav-links .language-link:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.hero {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  align-items: center;
  gap: 70px;
  min-height: 690px;
  padding: 84px 0;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 20px;
  font-size: clamp(3.4rem, 9vw, 6.7rem);
  line-height: 0.9;
  letter-spacing: -0.065em;
}

h1 span {
  display: block;
  margin-top: 18px;
  color: var(--accent);
  font-size: 0.28em;
  letter-spacing: 0.48em;
  text-indent: 0.48em;
}

.lead {
  max-width: 620px;
  margin-bottom: 32px;
  color: #d3dfdc;
  font-size: clamp(1.12rem, 2.2vw, 1.4rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.045);
  font-weight: 750;
  text-decoration: none;
}

.button.primary {
  border-color: transparent;
  color: #03110c;
  background: linear-gradient(120deg, var(--accent), var(--accent-strong));
  box-shadow: 0 12px 34px rgba(46, 225, 135, 0.2);
}

.hero-art {
  position: relative;
}

.hero-art::before {
  position: absolute;
  z-index: -1;
  inset: 10% -12%;
  content: "";
  border-radius: 50%;
  background: rgba(26, 223, 112, 0.22);
  filter: blur(70px);
}

.hero-art img {
  width: min(100%, 420px);
  margin-inline: auto;
  border-radius: 24%;
  box-shadow: var(--shadow);
}

.section {
  padding: 76px 0;
}

.section-title {
  max-width: 690px;
  margin-bottom: 34px;
}

.section-title h2,
.page-hero h1 {
  margin-bottom: 14px;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.13;
  letter-spacing: -0.04em;
}

.section-title p,
.page-hero p,
.muted {
  color: var(--muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  min-height: 230px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(22, 43, 47, 0.95), rgba(10, 24, 28, 0.88));
  box-shadow: var(--shadow);
}

.card-icon {
  display: grid;
  width: 44px;
  height: 44px;
  margin-bottom: 26px;
  place-items: center;
  border-radius: 14px;
  color: #07150e;
  background: var(--accent);
  font-size: 1.2rem;
  font-weight: 900;
}

.card h3 {
  margin-bottom: 10px;
  font-size: 1.18rem;
}

.card p {
  margin-bottom: 0;
  color: var(--muted);
}

.info-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 34px;
  border: 1px solid rgba(78, 232, 136, 0.22);
  border-radius: var(--radius);
  background: rgba(28, 126, 76, 0.13);
}

.info-band p {
  margin-bottom: 0;
  color: #c9d8d4;
}

.page-hero {
  max-width: 820px;
  padding: 86px 0 42px;
}

.document {
  max-width: 820px;
  padding: 0 0 100px;
}

.document section {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.document h2 {
  margin-bottom: 12px;
  font-size: 1.35rem;
}

.document h3 {
  margin: 24px 0 8px;
  font-size: 1.05rem;
}

.document li + li {
  margin-top: 8px;
}

.document code {
  padding: 0.14em 0.4em;
  border-radius: 6px;
  color: #b9ffd0;
  background: rgba(78, 232, 136, 0.1);
}

.notice {
  padding: 20px 22px;
  border: 1px solid rgba(78, 232, 136, 0.25);
  border-radius: 18px;
  background: rgba(78, 232, 136, 0.08);
}

.faq {
  border-top: 1px solid var(--line);
}

.faq details {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.faq summary {
  cursor: pointer;
  font-weight: 750;
}

.faq details p {
  margin: 12px 0 0;
  color: var(--muted);
}

.site-footer {
  padding: 38px 0 46px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.86rem;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-links {
  display: flex;
  gap: 18px;
}

@media (max-width: 780px) {
  .shell {
    width: min(100% - 28px, 680px);
  }

  .nav {
    min-height: 64px;
  }

  .brand {
    font-size: 0.72rem;
  }

  .brand img {
    width: 36px;
    height: 36px;
  }

  .nav-links a:first-child {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 52px;
    min-height: auto;
    padding: 74px 0 96px;
    text-align: center;
  }

  .hero-copy {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .hero-art {
    grid-row: 1;
  }

  .hero-art img {
    width: min(64vw, 300px);
  }

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

  .card {
    min-height: auto;
  }

  .info-band,
  .footer-content {
    align-items: flex-start;
    flex-direction: column;
  }

  .page-hero {
    padding-top: 64px;
  }
}

@media (max-width: 480px) {
  .brand-name {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

  .nav-links {
    gap: 16px;
    font-size: 0.82rem;
  }

  .hero {
    padding-top: 56px;
  }
}

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