/* 공부 노트 — 랜딩과 같은 결: 제목 · 표 · 식은 고정폭, 본문은 명조. */
:root {
  color-scheme: dark;
  --bg: #0e0e10; --ink: #e8e6e3; --muted: #a8a5a0; --line: #2c2c31; --faint: #6b6b70;
  --panel: #16161a; --accent: #a9cdee; --warm: #e0a46a;
  --mono: "Nanum Gothic Coding", ui-monospace, SFMono-Regular, Menlo, monospace;
  --serif: "Nanum Myeongjo", "AppleMyungjo", serif;
}
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--serif); font-size: 18px; line-height: 1.85;
  -webkit-font-smoothing: antialiased; word-break: keep-all; overflow-wrap: break-word;
}
html[lang="en"] body { word-break: normal; }
html[lang="ko"] [lang="en"]:not(html), html[lang="en"] [lang="ko"]:not(html) { display: none; }
.wrap { max-width: 40rem; margin: 0 auto; padding: 56px 16px 40px; }
.top { font-family: var(--mono); font-size: .85rem; color: var(--faint); margin-bottom: 48px; }
.top a { color: var(--muted); text-decoration: none; }
.top a:hover { color: var(--ink); }
h1, h2, h3 { font-family: var(--mono); font-weight: 700; letter-spacing: -0.01em; line-height: 1.35; }
h1 { font-size: clamp(1.6rem, 5.4vw, 2.3rem); margin: 0 0 .9rem; }
h2 { font-size: 1.15rem; margin: 2.8rem 0 .8rem; color: var(--ink); }
.lede { color: var(--muted); font-size: 1.08rem; margin: 0 0 2.5rem; }
p { margin: 0 0 1.15rem; }
strong { color: #fff; font-weight: 700; }
a { color: var(--accent); text-decoration: none; border-bottom: 1px solid rgba(169,205,238,.3); }
a:hover { border-color: var(--accent); }
ul, ol { padding-left: 1.3rem; margin: 0 0 1.2rem; }
li { margin: .3rem 0; }
code, pre { font-family: var(--mono); font-size: .9rem; }
code { background: var(--panel); padding: .1em .35em; border-radius: 4px; }
pre { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px; overflow-x: auto; line-height: 1.6; margin: 0 0 1.3rem; }
pre code { background: none; padding: 0; }
.table { overflow-x: auto; margin: 0 0 1.4rem; }
table { border-collapse: collapse; width: 100%; font-family: var(--mono); font-size: .86rem; line-height: 1.5; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 400; }
td.n, th.n { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
tr.me td { color: var(--warm); }
.fig { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 14px; margin: 1.6rem 0 2rem; }
.fig canvas { display: block; width: 100%; height: auto; image-rendering: pixelated; border-radius: 4px; }
.cap { font-family: var(--mono); font-size: .8rem; color: var(--faint); margin-top: 10px; line-height: 1.6; }
.ctl { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; margin-top: 12px; font-family: var(--mono); font-size: .82rem; color: var(--muted); }
.ctl label { display: flex; align-items: center; gap: 8px; flex: 1 1 220px; }
.ctl input[type=range] { flex: 1; accent-color: var(--accent); min-width: 80px; }
.ctl output { min-width: 3.2em; text-align: right; color: var(--ink); font-variant-numeric: tabular-nums; }
button { font-family: var(--mono); font-size: .85rem; color: var(--ink); background: transparent; border: 1px solid var(--faint); border-radius: 6px; padding: 7px 12px; cursor: pointer; }
button:hover, button:focus-visible { border-color: var(--ink); }
button[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); }
.ask { border-left: 2px solid var(--accent); padding: 4px 0 4px 16px; margin: 2rem 0; color: var(--ink); }
.foot { margin-top: 64px; padding-top: 20px; border-top: 1px solid var(--line); font-family: var(--mono); font-size: .8rem; color: var(--faint); display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: center; justify-content: space-between; }
.foot select { font-family: var(--mono); font-size: .8rem; background: var(--bg); color: var(--muted); border: 1px solid var(--line); border-radius: 6px; padding: 5px 8px; }
.meta { font-family: var(--mono); font-size: .78rem; color: var(--faint); line-height: 1.7; }
/* 목록 */
.list { list-style: none; padding: 0; margin: 0; }
.list li { margin: 0 0 2.2rem; }
.list a { border: 0; display: block; color: var(--ink); }
.list .t { font-family: var(--mono); font-weight: 700; font-size: 1.15rem; line-height: 1.4; display: block; }
.list .d { color: var(--muted); display: block; margin-top: .35rem; font-size: 1rem; }
.list .k { font-family: var(--mono); font-size: .75rem; color: var(--faint); display: block; margin-top: .4rem; }
.list a:hover .t { color: var(--accent); }
@media (max-width: 480px) { body { font-size: 17px; } .wrap { padding-top: 36px; } }
/* 패턴 맞히기 */
#pattern { font-family: var(--mono); font-size: .85rem; color: var(--muted); }
#pattern .ph { color: var(--faint); margin-bottom: 10px; }
#pattern .pseq { display: flex; flex-wrap: wrap; gap: 6px; font-size: 1.7rem; line-height: 1; margin-bottom: 12px; }
#pattern .sym { display: inline-block; min-width: 1.2em; text-align: center; }
#pattern .qm { color: var(--faint); }
#pattern .pq { color: var(--ink); margin-bottom: 8px; }
#pattern .popts { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
#pattern .popts button .sym { font-size: 1.3rem; }
#pattern .pnext { margin-left: auto; }
#pattern .pnext:disabled { opacity: .35; cursor: default; }
#pattern .pmsg { min-height: 2.6em; margin: 12px 0 10px; color: var(--ink); line-height: 1.5; }
#pattern .meters { display: grid; gap: 6px; }
#pattern .meter { display: flex; align-items: center; gap: 10px; }
#pattern .ml { width: 5.5em; flex: none; }
#pattern .mb { flex: 1; height: 8px; background: var(--bg); border-radius: 4px; overflow: hidden; }
#pattern .mf { display: block; height: 100%; transition: width .35s ease; }