:root{--ink:#16222e;--mute:#5b6b7a;--sky:#42b0ff;--sky2:#eaf6ff;--line:#e1e8ef;--bg:#fff}
@media(prefers-color-scheme:dark){:root{--ink:#e8eef4;--mute:#9fb0c0;--sky2:#14283a;--line:#2a3948;--bg:#0f1720}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans KR","Malgun Gothic",sans-serif}
.wrap{max-width:860px;margin:0 auto;padding:0 16px}
.top{border-bottom:1px solid var(--line);background:var(--bg);position:sticky;top:0;z-index:5}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;height:56px}
.brand{color:var(--ink);text-decoration:none;font-size:18px}.brand b{color:var(--sky)}.brand small{color:var(--mute);font-size:12px;margin-left:4px}
.top nav{display:flex;gap:14px;align-items:center;font-size:14px}.top nav a{color:var(--ink);text-decoration:none}.top nav a.go{background:var(--sky);color:#04263d;padding:7px 14px;border-radius:999px;font-weight:600}
main{padding-top:20px;padding-bottom:40px}
.crumbs{font-size:13px;color:var(--mute);margin:0 0 10px}.crumbs a{color:var(--mute)}.crumbs i{font-style:normal;padding:0 4px}
h1{font-size:30px;line-height:1.25;margin:6px 0 14px}h2{font-size:20px;margin:30px 0 8px}
.lead{font-size:18px;color:var(--ink)}a{color:#1479c2}@media(prefers-color-scheme:dark){a{color:#6cc0ff}}
.kr{font-family:"Noto Sans KR","Malgun Gothic","Apple SD Gothic Neo",sans-serif}
ul,ol{padding-left:22px}li{margin:4px 0}ul.ex{list-style:none;padding:0}ul.ex li{background:var(--sky2);border-radius:10px;padding:9px 14px;margin:6px 0}
ul.links.cols{columns:2;column-gap:28px}ul.links.cols li{break-inside:avoid}
.tbl{width:100%;border-collapse:collapse;font-size:15px;display:block;overflow-x:auto}.tbl th,.tbl td{border-bottom:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}.tbl th{background:var(--sky2)}
.words td small{display:block;color:var(--mute);font-size:12px}
.cta{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;background:var(--sky2);border:1px solid var(--line);border-radius:16px;padding:16px 18px;margin:30px 0}
.cta b{display:block;font-size:17px}.cta span{color:var(--mute);font-size:14px}.btn{background:var(--sky);color:#04263d;padding:10px 18px;border-radius:999px;text-decoration:none;font-weight:700}
.nav2{display:flex;justify-content:space-between;gap:10px;font-size:14px;margin-top:20px}
ul.levels{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px}
ul.levels a{display:block;border:1px solid var(--line);border-radius:14px;padding:12px 14px;text-decoration:none;color:var(--ink)}ul.levels a:hover{border-color:var(--sky)}
ul.levels b{display:block}ul.levels span{display:block;color:var(--mute);font-size:14px}ul.levels small{color:var(--mute)}
.foot{border-top:1px solid var(--line);color:var(--mute);font-size:14px;padding:20px 0 40px}
@media(max-width:640px){h1{font-size:24px}ul.links.cols{columns:1}.top nav a:not(.go){display:none}}