:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  background: #f4f7fb;
  color: #142033;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(145deg, #f8fbff 0%, #eef5f4 50%, #f8f2f8 100%);
}

a {
  color: #1469a8;
}

.shell {
  width: min(880px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 64px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 0 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: inherit;
  text-decoration: none;
}

.brand img {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  box-shadow: 0 12px 30px rgba(23, 51, 76, 0.18);
}

.brand strong {
  display: block;
  font-size: 20px;
}

.brand span {
  display: block;
  margin-top: 3px;
  color: #667389;
  font-size: 13px;
}

nav {
  display: flex;
  gap: 8px;
}

nav a,
.language-links a {
  border: 1px solid rgba(89, 105, 126, 0.2);
  border-radius: 20px;
  padding: 9px 13px;
  color: inherit;
  background: rgba(255, 255, 255, 0.68);
  text-decoration: none;
  font-size: 14px;
}

main {
  overflow: hidden;
  border: 1px solid rgba(105, 124, 148, 0.2);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 22px 70px rgba(38, 58, 79, 0.12);
  backdrop-filter: blur(22px) saturate(140%);
}

.intro,
.content-section {
  padding: clamp(24px, 5vw, 48px);
}

.intro {
  border-bottom: 1px solid rgba(105, 124, 148, 0.16);
}

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

h1 {
  margin-bottom: 12px;
  font-size: clamp(30px, 8vw, 48px);
  line-height: 1.08;
}

h2 {
  margin-bottom: 22px;
  font-size: 26px;
}

h3 {
  margin: 28px 0 8px;
  font-size: 17px;
}

p,
li {
  color: #435168;
  font-size: 16px;
  line-height: 1.7;
}

.lede {
  max-width: 660px;
  margin: 0;
  font-size: 18px;
}

.language-links {
  display: flex;
  gap: 8px;
  margin-top: 24px;
}

.content-section + .content-section {
  border-top: 1px solid rgba(105, 124, 148, 0.16);
}

.contact {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 8px;
  border-radius: 20px;
  padding: 10px 16px;
  background: #143d59;
  color: #ffffff;
  text-decoration: none;
  font-weight: 650;
}

.link-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.link-list a {
  min-height: 96px;
  border: 1px solid rgba(105, 124, 148, 0.2);
  border-radius: 20px;
  padding: 20px;
  color: inherit;
  background: rgba(255, 255, 255, 0.72);
  text-decoration: none;
}

.link-list strong,
.link-list span {
  display: block;
}

.link-list span {
  margin-top: 6px;
  color: #667389;
  line-height: 1.45;
}

footer {
  padding: 24px 8px 0;
  color: #6c788a;
  font-size: 13px;
  text-align: center;
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .link-list {
    grid-template-columns: 1fr;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    background: #101722;
    color: #edf5ff;
  }

  body {
    background: linear-gradient(145deg, #111923 0%, #152421 52%, #231923 100%);
  }

  .brand span,
  footer,
  .link-list span {
    color: #9baabd;
  }

  nav a,
  .language-links a,
  main,
  .link-list a {
    border-color: rgba(204, 220, 239, 0.16);
    background: rgba(21, 30, 43, 0.78);
  }

  p,
  li {
    color: #c3cede;
  }

  a {
    color: #79c7ff;
  }

  .contact {
    background: #d9f2ff;
    color: #10293c;
  }
}