:root {
  color-scheme: light dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.65;
  background: #f6f7f8;
  color: #1f2933;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 18px 48px;
}

.card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 18px;
  padding: 28px;
  box-shadow: 0 6px 24px rgba(0,0,0,.05);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 22px;
}

.brand {
  font-size: 22px;
  font-weight: 700;
}

.language select {
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid #cfd6dc;
  background: transparent;
  font-size: 15px;
}

h1 {
  margin-top: 0;
  font-size: 30px;
}

h2 {
  margin-top: 30px;
  font-size: 21px;
}

ul {
  padding-left: 24px;
}

.meta {
  color: #667085;
  margin-bottom: 24px;
}

footer {
  margin-top: 34px;
  color: #667085;
  font-size: 14px;
}

a {
  color: #1769aa;
}

@media (prefers-color-scheme: dark) {
  body {
    background: #111418;
    color: #e8eaed;
  }

  .card {
    background: #191d22;
    border-color: #30363d;
  }

  .meta,
  footer {
    color: #aab2bd;
  }

  .language select {
    color: #e8eaed;
    border-color: #4b5563;
  }
}

@media (max-width: 600px) {
  .container {
    padding: 12px;
  }

  .card {
    padding: 20px;
    border-radius: 14px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }
}