:root {
  --paper: #e9f0f1; --sheet: #f6f9f9; --ink: #2b303b; --grey: #6f7783; --line: #c3cbd0;
  --f-ui: "IBM Plex Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  color-scheme: light;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 15px/1.75 var(--f-ui); }
.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px max(16px, 4vw); border-bottom: 1px solid var(--line); }
.brand { text-decoration: none; color: var(--ink); display: flex; gap: 10px; align-items: baseline; }
.mark { font: 700 18px/1 var(--f-mono); letter-spacing: 0.18em; }
.sub { font: 500 11px/1 var(--f-mono); letter-spacing: 0.3em; color: var(--grey); }
.lang { display: inline-flex; border: 1px solid var(--line); border-radius: 99px; overflow: hidden; background: var(--sheet); }
.lang button { font: 700 12px/1 var(--f-mono); background: none; border: 0; color: var(--grey); padding: 8px 12px; cursor: pointer; }
.lang button[aria-pressed="true"] { background: var(--ink); color: #fff; }
main { max-width: 820px; margin: 0 auto; padding: 32px 16px 80px; }
h1 { font-size: 26px; margin: 0 0 6px; }
.date { color: var(--grey); font-size: 13px; margin: 0 0 28px; }
h2 { font-size: 17px; margin: 32px 0 8px; }
p, li { margin: 0 0 10px; }
ul, ol { padding-left: 22px; margin: 0 0 12px; }
table { width: 100%; border-collapse: collapse; margin: 8px 0 14px; font-size: 14px; background: var(--sheet); display: block; overflow-x: auto; }
footer, main { overflow-wrap: anywhere; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: #eef3f4; font-weight: 600; }
.box { background: var(--sheet); border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px; margin: 12px 0; }
a { color: var(--ink); }
footer { border-top: 1px solid var(--line); padding: 18px max(16px, 4vw); color: var(--grey); font-size: 12px; line-height: 1.7; }