/* FCS Weekly — clean editorial style, mobile-first, no tracking. */
:root {
  --ink: #1c2420;
  --muted: #5c6b64;
  --accent: #0f5f56;
  --rule: #e3e8e5;
  --bg: #ffffff;
  --max: 680px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", "Songti SC", "Noto Serif CJK SC", serif;
  font-size: 18px;
  line-height: 1.75;
}
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.site-header { border-bottom: 1px solid var(--rule); padding: 14px 0; }
.site-header .wrap { display: flex; justify-content: space-between; align-items: center; }
.brand {
  font-family: -apple-system, "Helvetica Neue", Arial, "PingFang SC", sans-serif;
  font-weight: 700; font-size: 20px; color: var(--ink); text-decoration: none;
}
.brand span { color: var(--muted); font-weight: 400; font-size: 16px; }
.lang-toggle button {
  font-family: -apple-system, "Helvetica Neue", Arial, sans-serif;
  font-size: 14px; padding: 5px 12px; margin-left: 6px;
  border: 1px solid var(--accent); border-radius: 20px;
  background: #fff; color: var(--accent); cursor: pointer;
}
.lang-toggle button.active { background: var(--accent); color: #fff; }
main { padding: 28px 0 40px; }
h1 { font-size: 30px; line-height: 1.3; margin: 0 0 8px; }
h2 { font-size: 22px; margin: 32px 0 10px; padding-top: 8px; border-top: 1px solid var(--rule); }
h3 { font-size: 19px; margin: 24px 0 8px; }
p { margin: 0 0 14px; }
a { color: var(--accent); }
ul, ol { margin: 0 0 14px; padding-left: 24px; }
li { margin-bottom: 6px; }
hr { border: none; border-top: 1px solid var(--rule); margin: 28px 0; }
.intro p { color: var(--muted); font-family: -apple-system, "Helvetica Neue", Arial, "PingFang SC", sans-serif; font-size: 16px; }
.lang-switch { font-family: -apple-system, "Helvetica Neue", Arial, sans-serif; font-size: 14px; }
.archive ul { list-style: none; padding-left: 0; }
.archive .date { color: var(--muted); font-size: 14px; margin-left: 8px; }
.site-footer { border-top: 1px solid var(--rule); padding: 20px 0 32px; font-size: 15px; color: var(--muted); }
.site-footer .fine { font-size: 13px; }
@media (max-width: 560px) {
  body { font-size: 17px; }
  h1 { font-size: 25px; }
}