:root {
  --ground: #EFF0F4;
  --surface: #F7F8FB;
  --line: #C3C6D2;
  --text: #1A1822;
  --text-mid: #5A5568;
  --accent: #D9362A;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ground: #1A1822;
    --surface: #1F1D29;
    --line: #332F3F;
    --text: #F3F1F8;
    --text-mid: #A8A2B8;
    --accent: #FF6A5C;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--ground);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 22px 80px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 28px; }
.mark { width: 44px; height: 44px; flex: none; }
.brand { font-weight: 700; font-size: 20px; letter-spacing: -0.01em; }
.brand small { display: block; font-weight: 400; font-size: 14px; color: var(--text-mid); letter-spacing: 0; }
h1 { font-size: 32px; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 6px; }
h2 { font-size: 20px; margin: 34px 0 8px; letter-spacing: -0.01em; }
p, li { color: var(--text); }
.meta { color: var(--text-mid); font-size: 15px; margin: 0 0 24px; }
ul { padding-left: 20px; }
li + li { margin-top: 6px; }
a { color: var(--accent); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 18px 20px; margin: 22px 0; }
.lang { display: flex; gap: 14px; font-size: 15px; margin-bottom: 20px; }
nav.links { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 40px; font-size: 15px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0 8px; }
footer { color: var(--text-mid); font-size: 14px; margin-top: 12px; }