@font-face{font-family:'LTCT Noto Sans KR';src:url('/fonts/ltct-noto-sans-kr-450-e719ef95d88a.woff') format('woff');font-style:normal;font-weight:450;font-display:swap}
:root{--ink:#292d29;--muted:#626860;--brown:#725840;--green:#436653;--paper:#f8f5ef;--line:#d9d2c8;--soft:#edf3ed}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font-family:'LTCT Noto Sans KR','Noto Sans KR','Malgun Gothic',sans-serif;font-size:20px;font-weight:450;line-height:1.9;word-break:keep-all}a{color:#684a34;text-underline-offset:4px}.top{border-bottom:1px solid var(--line);padding:18px max(20px,calc((100vw - 1040px)/2));display:flex;justify-content:space-between;gap:18px;font-size:16px}.top a{text-decoration:none;color:inherit}.wrap{max-width:1040px;margin:auto;padding:42px 28px 80px}.crumb{font-size:16px;color:var(--muted);margin-bottom:24px}.hero{display:grid;grid-template-columns:minmax(0,1.28fr) minmax(260px,.72fr);gap:42px;align-items:center;padding:34px 0 42px;border-bottom:1px solid var(--line)}.eyebrow{font-size:16px;color:var(--brown);letter-spacing:.06em;margin:0 0 10px}.hero h1{font-size:clamp(34px,5vw,55px);line-height:1.3;letter-spacing:-.045em;margin:0 0 18px}.dek{font-size:21px;color:#4f5850;margin:0}.portrait{margin:0;padding:16px;background:var(--paper);border:1px solid var(--line);border-radius:18px;text-align:center}.portrait img{display:block;width:min(100%,235px);height:auto;margin:auto}.portrait figcaption{font-size:13px;color:var(--muted);line-height:1.6;margin-top:8px}.tools{display:flex;gap:10px;align-items:center;flex-wrap:wrap;padding:16px 0;border-bottom:1px solid var(--line);font-size:16px}.tools button{border:1px solid #bbb1a4;background:#fff;border-radius:7px;padding:7px 11px;cursor:pointer}.intro{max-width:820px;margin:40px auto 18px;font-size:21px}.grid{display:grid;grid-template-columns:210px minmax(0,1fr);gap:52px;align-items:start;margin-top:24px}.toc{position:sticky;top:20px;font-size:16px}.toc strong{display:block;margin-bottom:8px}.toc a{display:block;padding:8px 0;border-bottom:1px solid #eee8df;text-decoration:none;color:#595f58}.article section{padding:32px 0;border-top:1px solid var(--line);scroll-margin-top:20px}.kicker{font-size:15px;color:#816950;letter-spacing:.06em;margin:0 0 8px}.article h2{font-size:30px;line-height:1.5;letter-spacing:-.035em;margin:0 0 18px}.article p{margin:0 0 20px}.quote-note,.application{padding:20px 23px;background:var(--paper);border-left:3px solid #96795d;margin:24px 0}.application{background:#f2f6f0;border-left-color:#63806c}.formula{font-family:Georgia,'Times New Roman',serif;text-align:center;font-size:clamp(34px,6vw,54px);color:#654a34;margin:26px 0}.lab{border:1px solid #cfc6b9;border-radius:14px;overflow:hidden;margin:24px 0;background:#fff}.lab-head{padding:18px 20px;background:var(--paper);border-bottom:1px solid var(--line)}.lab-head strong{display:block;font-size:21px}.lab-head span{font-size:16px;color:var(--muted)}.lab-body{padding:18px 20px}.lab-actions{display:flex;gap:9px;flex-wrap:wrap;margin:0 0 14px}.lab-actions button{border:1px solid #bcb3a6;background:#fff;border-radius:7px;padding:8px 12px;cursor:pointer}.lab-actions button.active{background:var(--green);color:#fff;border-color:var(--green)}table{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}th,td{padding:11px 8px;border-bottom:1px solid #e7e1d9;text-align:center}th{background:#fbfaf7;font-size:16px}td:first-child,th:first-child{text-align:left}.bit{min-width:42px;border:1px solid #bcb3a6;border-radius:6px;background:#fff;padding:5px 9px;cursor:pointer;font-size:20px}.bit.on{background:var(--green);color:#fff;border-color:var(--green)}.result{margin-top:15px;padding:14px 16px;background:var(--soft);border-radius:9px;color:#34513f}.term{font-family:Georgia,serif}.sources{font-size:16px}.sources li{margin:10px 0}.series-nav{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:28px 0 0;margin-top:30px;border-top:1px solid var(--line)}.series-nav a{text-decoration:none}.footer{border-top:1px solid var(--line);margin-top:40px;padding-top:20px;font-size:15px;color:var(--muted)}
@media(max-width:760px){body{font-size:18px}.wrap{padding:28px 20px 60px}.hero{grid-template-columns:1fr}.portrait{order:-1}.grid{grid-template-columns:1fr}.toc{position:static}.toc nav{display:flex;gap:12px;overflow:auto}.toc a{white-space:nowrap;border:1px solid var(--line);border-radius:18px;padding:6px 11px}table[data-responsive="cards"] thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}table[data-responsive="cards"],table[data-responsive="cards"] tbody,table[data-responsive="cards"] tr,table[data-responsive="cards"] td{display:block;width:100%}table[data-responsive="cards"] tr{border:1px solid var(--line);border-radius:10px;margin:10px 0;padding:10px}table[data-responsive="cards"] td{border:0;display:flex;justify-content:space-between;gap:12px;text-align:right;padding:5px}table[data-responsive="cards"] td:before{content:attr(data-label);font-size:14px;color:var(--muted);text-align:left}}
.count-control{display:inline-flex;align-items:center;gap:8px}.count-control button{width:36px;height:36px;border:1px solid #bcb3a6;border-radius:7px;background:#fff;font-size:20px;cursor:pointer}.count-control strong{min-width:38px;font-variant-numeric:tabular-nums}.function-badge{display:inline-flex;gap:6px;flex-wrap:wrap}.function-badge button{border:1px solid #c9c0b4;background:#fff;border-radius:999px;padding:6px 10px;cursor:pointer;font-size:15px}.function-badge button.active{background:var(--green);color:#fff;border-color:var(--green)}.lab-note{font-size:15px;color:var(--muted);margin:10px 0 0}.two-status{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}.two-status div{padding:12px;border:1px solid #d6ded4;border-radius:9px;background:#f7faf6}.two-status strong{display:block}@media(max-width:620px){.two-status{grid-template-columns:1fr}}