/* Shared style for simple notes and the index page. No web fonts: Google Fonts is slow in mainland China. */
:root{
  --paper:#f5f7f6; --card:#ffffff; --ink:#18302c; --muted:#5b6f6a; --line:#d5dfdc;
  --teal:#1f6f63; --teal-soft:#e2f0ec; --amber:#b5761a;
  --f-display:"Songti SC","STSong","Noto Serif SC","Source Han Serif SC",serif;
  --f-body:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --f-mono:ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme: dark){:root{
  --paper:#111a18; --card:#18231f; --ink:#e3ece9; --muted:#9db0aa; --line:#2c3b37;
  --teal:#6cc2b2; --teal-soft:#1d3531; --amber:#e3a94f; color-scheme:dark}}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--f-body);font-size:16px;line-height:1.75}
.wrap{max-width:780px;margin:0 auto;padding:32px 16px 72px;display:flex;flex-direction:column;gap:20px}
h1,h2,h3{font-family:var(--f-display);line-height:1.3;text-wrap:balance;margin:0}
h1{font-size:clamp(26px,5vw,36px);font-weight:900}
h2{font-size:22px;margin-top:20px;padding-top:16px;border-top:1px solid var(--line)}
h3{font-size:17px}
p,ul,ol{margin:0}
ul,ol{padding-left:1.3em}
a{color:var(--teal);text-underline-offset:3px}
code,pre{font-family:var(--f-mono);font-size:14px}
pre{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:12px 14px;overflow-x:auto;line-height:1.5}
.meta{font-family:var(--f-mono);font-size:13px;color:var(--muted)}
.back{font-size:14px}
.tbl{overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:var(--card)}
table{border-collapse:collapse;width:100%;min-width:560px;font-size:14.5px}
th,td{text-align:left;padding:8px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--teal-soft)}
tr:last-child td{border-bottom:none}
.callout{background:var(--teal-soft);border-radius:8px;padding:12px 16px;font-size:15px}