:root {
  --brand: #008ACE;
  --brand-dark: #004E75;
  --ink: #14202b;
  --muted: #5b6b7a;
  --line: #e3e9ef;
  --bg: #ffffff;
  --surface: #f6f9fc;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8eef4;
    --muted: #9fb0c0;
    --line: #23303d;
    --bg: #0f1720;
    --surface: #16212c;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
}

header {
  background: linear-gradient(160deg, var(--brand), var(--brand-dark));
  color: #fff;
  padding: 40px 20px 34px;
}

header .wrap { max-width: 760px; margin: 0 auto; }

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .2px;
  color: #fff;
  text-decoration: none;
}

.logo .mark {
  width: 40px; height: 40px;
  border-radius: 11px;
  background: rgba(255,255,255,.18);
  display: grid; place-items: center;
  font-size: 21px;
}

header h1 { margin: 20px 0 6px; font-size: 27px; line-height: 1.25; }
header p  { margin: 0; opacity: .92; font-size: 15px; }

main { max-width: 760px; margin: 0 auto; padding: 34px 20px 60px; }

h2 {
  font-size: 19px;
  margin: 34px 0 10px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
main > h2:first-of-type { border-top: 0; padding-top: 0; margin-top: 6px; }

h3 { font-size: 15px; margin: 20px 0 6px; }
p, li { font-size: 15px; }
ul { padding-left: 20px; }
li { margin-bottom: 7px; }

a { color: var(--brand); }

.meta {
  color: var(--muted);
  font-size: 13.5px;
  margin-bottom: 24px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 20px;
  margin: 18px 0;
}

.card h3 { margin-top: 0; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 14.5px;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { font-weight: 600; color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: .4px; }

.table-scroll { overflow-x: auto; }

.btn {
  display: inline-block;
  background: var(--brand);
  color: #fff !important;
  text-decoration: none;
  padding: 12px 22px;
  border-radius: 26px;
  font-weight: 600;
  font-size: 15px;
}

footer {
  border-top: 1px solid var(--line);
  padding: 26px 20px 44px;
  color: var(--muted);
  font-size: 13.5px;
}
footer .wrap { max-width: 760px; margin: 0 auto; }
footer a { color: var(--muted); margin-right: 16px; }

.lang-note {
  font-size: 13px;
  color: var(--muted);
  border-left: 3px solid var(--brand);
  padding: 6px 0 6px 12px;
  margin: 28px 0 10px;
}