/* 효지니어스 디자인
   색과 글꼴은 아래 :root 에서 한 번에 바꿀 수 있어요. */
:root{
  --bg:#F5F8FC; --surface:#FFFFFF; --ink:#1C2E4A; --muted:#5B6B82; --line:#DCE4EF;
  --navy:#1F3B63; --sky:#3E8FD8; --sky-soft:#E3F0FB;
  --sun:#F4B73A; --sun-soft:#FFF3D6; --orange:#E8762E;
  --display:"Jua","Noto Sans KR",system-ui,sans-serif;
  --body:"Noto Sans KR",system-ui,-apple-system,"Apple SD Gothic Neo",sans-serif;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#111A28; --surface:#18243A; --ink:#E8EEF7; --muted:#A3B1C6; --line:#2A3A55;
  --navy:#9CC4F0; --sky:#6CB2F0; --sky-soft:#1D3150; --sun:#F6C55A; --sun-soft:#3A3120; --orange:#F2955A; color-scheme:dark}}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.75;word-break:keep-all}
img{max-width:100%;height:auto}
a{color:inherit}
.wrap{max-width:1080px;margin:0 auto;padding-inline:20px}
h1,h2,h3{font-family:var(--display);font-weight:400;line-height:1.35;text-wrap:balance;margin:0;color:var(--navy)}
button,input,textarea{font:inherit}
:focus-visible{outline:3px solid var(--sun);outline-offset:2px}
[hidden]{display:none!important}
.label{font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--orange)}
.btn{display:inline-block;border:none;border-radius:10px;padding:10px 16px;background:var(--sun);color:#1C2E4A;font-weight:700;cursor:pointer;text-decoration:none;text-align:center}
.btn:hover{filter:brightness(1.05)}
.empty{color:var(--muted);background:var(--surface);border:1px dashed var(--line);border-radius:16px;padding:24px;text-align:center}

/* header */
header{position:sticky;top:0;z-index:10;background:var(--surface);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:12px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--display);font-size:26px;color:var(--navy)}
.logo svg{width:36px;height:36px;flex:none}
nav ul{display:flex;gap:4px;list-style:none;margin:0;padding:0}
nav a{display:block;padding:8px 12px;border-radius:10px;text-decoration:none;font-weight:500;font-size:15px;color:var(--muted)}
nav a:hover,nav a[aria-current="page"]{color:var(--navy);background:var(--sky-soft)}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:10px;padding:6px 12px;color:var(--ink);cursor:pointer}
@media (max-width:820px){
  .menu-btn{display:block}
  nav{display:none;width:100%}
  nav.open{display:block}
  .bar{flex-wrap:wrap}
  nav ul{flex-direction:column;padding-bottom:8px}
}
main{padding-block:32px 56px}

/* hero */
.crayon{background-image:linear-gradient(transparent 62%,var(--sun) 62%,var(--sun) 88%,transparent 88%);padding-inline:2px}
.hero{display:grid;grid-template-columns:1.3fr 1fr;gap:32px;align-items:center;padding-block:8px 32px}
.hero h1{font-size:clamp(30px,5vw,46px)}
.hero p{color:var(--muted);margin:16px 0 0;max-width:34em}
.hero .who{display:inline-flex;gap:8px;align-items:center;margin-top:20px;font-size:15px;font-weight:500;color:var(--navy)}
.hero .who b{background:var(--navy);color:var(--surface);border-radius:999px;padding:2px 12px;font-weight:700}
.hero-art{background:var(--sky-soft);border-radius:28px;padding:20px;display:grid;place-items:center}
.hero-art svg{width:100%;max-width:340px;height:auto}
@media (max-width:820px){.hero{grid-template-columns:1fr}.hero-art{order:-1}.hero-art svg{max-width:240px}}

/* stages */
.stages{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:14px}
.stage{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px;text-decoration:none;display:grid;gap:6px;transition:transform .15s}
.stage:hover{transform:translateY(-3px);border-color:var(--sky)}
.stage .age{font-family:var(--display);font-size:24px;color:var(--navy)}
.stage .term{font-size:14px;color:var(--sky);font-weight:700}
.stage p{margin:0;font-size:15px;color:var(--muted);line-height:1.6}
.stage-note{font-size:14px;color:var(--muted);margin:10px 0 0}
@media (max-width:720px){.stages{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.stage{padding:16px}.stage p{font-size:14px}}

.chip{display:inline-block;font-size:13px;font-weight:700;border-radius:999px;padding:2px 10px;background:var(--sky-soft);color:var(--navy);text-decoration:none}
.chip.age{background:var(--sun-soft);color:var(--ink)}

/* sections */
.sec{margin-top:48px}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:12px;flex-wrap:wrap}
.sec-head h2{font-size:26px}
.sec-head a{font-size:15px;color:var(--sky);text-decoration:none;font-weight:500}

/* club */
.club{background:var(--sky-soft);border-radius:26px;padding:28px clamp(20px,4vw,40px);display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:28px;align-items:center}
.club-text{display:grid;gap:10px}
.club h2{font-size:clamp(24px,3.4vw,32px)}
.club-text>p{margin:0;max-width:40em}
.club-steps{list-style:none;margin:6px 0 0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;counter-reset:s}
.club-steps li{background:var(--surface);border-radius:14px;padding:12px 14px;display:grid;gap:2px;counter-increment:s}
.club-steps li b{font-family:var(--display);font-weight:400;font-size:18px;color:var(--navy)}
.club-steps li b::before{content:counter(s) ". ";color:var(--sky)}
.club-steps li span{font-size:13.5px;color:var(--muted);line-height:1.5}
.club-note{font-size:13.5px;color:var(--muted)}
.club-cta{background:var(--surface);border-radius:20px;padding:20px;display:grid;gap:12px;border:2px dashed var(--line)}
.club-cta b{font-family:var(--display);font-weight:400;font-size:20px;color:var(--navy)}
.club-cta p{margin:0;font-size:14px;color:var(--muted)}
@media (max-width:820px){.club{grid-template-columns:minmax(0,1fr)}.club-steps{grid-template-columns:minmax(0,1fr)}}

/* way */
.way{display:grid;gap:12px}
.way h2{font-size:clamp(24px,3.4vw,32px)}
.steps{list-style:none;margin:12px 0 0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.steps li{display:grid;gap:8px;align-content:start;padding-top:16px;border-top:3px solid var(--sky-soft)}
.steps .n{font-family:var(--display);font-size:34px;line-height:1;color:var(--sky)}
.steps h3{font-size:21px}
.steps p{margin:0;font-size:15.5px;color:var(--muted);line-height:1.7}
@media (max-width:820px){.steps{grid-template-columns:minmax(0,1fr);gap:20px}}

/* faq */
.faq{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:28px clamp(20px,4vw,40px);display:grid;gap:12px}
.faq h2{font-size:clamp(22px,3vw,28px)}
.faq p{margin:0;max-width:44em}
.faq b{color:var(--navy)}
.watch{background:var(--sun-soft);border-radius:14px;padding:16px 20px;margin-top:4px;font-size:15px}
.watch ul{margin:6px 0 8px;padding-left:20px}

/* two columns */
.cols{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:32px}
@media (max-width:900px){.cols{grid-template-columns:minmax(0,1fr)}}
aside{display:grid;gap:20px;align-content:start}
.box{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px}
.box h3{font-size:20px;margin-bottom:8px}
.box p{margin:0;font-size:15px;color:var(--muted);line-height:1.6}
.sub{background:var(--navy);border:none}
.sub h3{color:var(--sun)}
.sub p{color:var(--surface);opacity:.9;margin-bottom:14px}
.catlist{list-style:none;margin:0;padding:0;display:grid}
.catlist a{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--line);text-decoration:none;font-size:15px}
.catlist li:last-child a{border-bottom:none}
.catlist span{color:var(--muted);font-variant-numeric:tabular-nums}

/* posts */
.post{display:grid;grid-template-columns:120px minmax(0,1fr);gap:18px;padding-block:20px;border-bottom:1px solid var(--line);text-decoration:none}
.post:first-child{padding-top:4px}
.thumb{aspect-ratio:1;max-width:100%;border-radius:16px;display:grid;place-items:center;overflow:hidden}
.thumb svg{width:58%;height:auto}
.thumb img{width:100%;height:100%;object-fit:cover}
.post h3{font-size:21px;margin-top:6px}
.post p{margin:6px 0 0;font-size:15px;color:var(--muted);line-height:1.6}
.meta{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.meta time{font-size:13px;color:var(--muted);margin-left:4px}
@media (max-width:520px){.post{grid-template-columns:84px minmax(0,1fr);gap:14px}.post h3{font-size:18px}.post p{display:none}}

/* inner pages */
.page-head{margin-bottom:24px}
.page-head h1{font-size:clamp(28px,4vw,38px)}
.page-head p{color:var(--muted);margin:8px 0 0;max-width:44em}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.filters button{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:999px;padding:6px 14px;font-size:14px;cursor:pointer}
.filters button[aria-pressed="true"]{background:var(--navy);border-color:var(--navy);color:var(--surface)}
.catgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.cat{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px;display:grid;gap:8px;text-decoration:none;color:var(--ink)}
.cat:hover{border-color:var(--sky)}
.cat .ic{width:44px;height:44px;border-radius:12px;display:grid;place-items:center}
.cat .ic svg{width:26px}
.cat h3{font-size:21px}
.cat p{margin:0;font-size:14px;color:var(--muted);line-height:1.6}

/* article */
.article{max-width:44em}
.article .meta{margin-bottom:12px}
.article h1{font-size:clamp(28px,4.4vw,40px)}
.article .lead{color:var(--muted);margin:12px 0 24px}
.article .cover{border-radius:20px;margin-bottom:24px;width:100%}
.prose h2{font-size:24px;margin:36px 0 10px}
.prose h3{font-size:20px;margin:28px 0 8px}
.prose p{margin:0 0 16px}
.prose ul,.prose ol{padding-left:22px;margin:0 0 16px}
.prose li{margin-bottom:4px}
.prose img{border-radius:16px;margin:8px 0}
.prose blockquote{margin:0 0 16px;padding:12px 18px;background:var(--sky-soft);border-radius:12px}
.prose a{color:var(--sky)}
.back{display:inline-block;margin-top:32px;color:var(--sky);text-decoration:none;font-weight:500}

/* about */
.about{display:grid;grid-template-columns:200px minmax(0,1fr);gap:32px;align-items:start}
.portrait{aspect-ratio:1;max-width:100%;border-radius:24px;background:var(--sky-soft);display:grid;place-items:center;overflow:hidden}
.portrait img{width:100%;height:100%;object-fit:cover}
.portrait svg{width:50%}
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:20px 0}
.fact{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px;text-align:center}
.fact b{display:block;font-family:var(--display);font-weight:400;font-size:22px;color:var(--navy)}
.fact span{font-size:13px;color:var(--muted);line-height:1.4;display:block}
@media (max-width:720px){.about{grid-template-columns:1fr}.portrait{max-width:180px}.facts{grid-template-columns:1fr}}

/* library */
.mat{background:var(--sun-soft);border-radius:22px;padding:22px clamp(20px,4vw,32px);margin-bottom:20px;display:grid;gap:6px}
.mat h2{font-size:22px}
.mat p{margin:0;font-size:15px;color:var(--muted)}
.mat-list{list-style:none;margin:8px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.mat-list li{background:var(--surface);border-radius:999px;padding:4px 12px;font-size:14px;font-weight:500}
.notify{background:var(--navy);color:var(--surface);border-radius:22px;padding:22px clamp(20px,4vw,36px);display:flex;gap:16px 24px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin-bottom:28px}
.notify h2{color:var(--sun);font-size:22px}
.notify p{margin:4px 0 0;font-size:15px;opacity:.9;max-width:36em}
.parts{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:16px}
.parts button{border:2px solid var(--line);background:var(--surface);color:var(--ink);border-radius:18px;padding:16px 18px;text-align:left;cursor:pointer;display:grid;gap:2px}
.parts .pn{font-family:var(--display);font-size:24px;color:var(--navy)}
.parts .pd{font-size:14px;color:var(--muted)}
.parts button[aria-selected="true"]{border-color:var(--navy);background:var(--sky-soft)}
@media (max-width:520px){.parts .pn{font-size:20px}.parts .pd{font-size:13px}}
.sgroup{padding-block:22px;border-top:1px solid var(--line)}
.shead{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;align-items:baseline;margin-bottom:14px}
.shead h2{font-size:26px}
.shead .sage{font-weight:700;color:var(--orange);font-size:15px}
.shead p{grid-column:1/-1;margin:0;font-size:15px;color:var(--muted);max-width:44em}
.sheets{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:18px}
.sheet{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:14px;display:grid;gap:10px;align-content:start;position:relative}
.paper{aspect-ratio:210/297;max-width:100%;background:var(--bg);border-radius:10px;padding:10% 12%;display:grid;grid-template-rows:auto 1fr auto;gap:8%;border:1px solid var(--line);overflow:hidden}
.paper.photo{padding:0;display:block}
.paper.photo img{width:100%;height:100%;object-fit:cover}
.paper .pt{height:7px;width:60%;border-radius:4px;background:var(--navy);opacity:.75}
.paper .pi{border:2px dashed var(--line);border-radius:10px;display:grid;place-items:center}
.paper .pi svg{width:46%}
.paper .pl{display:grid;gap:6px}
.paper .pl i{height:4px;border-radius:2px;background:var(--line)}
.sheet h3{font-size:19px}
.sheet .row{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}
.sheet .pages{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.sheet .desc,.sheet .mats{margin:0;font-size:13.5px;color:var(--muted);line-height:1.5}
.sheet .get{display:block;border-radius:10px;padding:10px;background:var(--navy);color:var(--surface);font-weight:700;text-align:center;text-decoration:none}
.newb{position:absolute;top:22px;right:22px;background:var(--orange);color:#fff;font-size:12px;font-weight:700;border-radius:6px;padding:2px 8px}
.sgroup .empty{padding:16px;font-size:14px}

footer{border-top:1px solid var(--line);background:var(--surface);padding-block:28px;font-size:14px;color:var(--muted)}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
footer a{text-decoration:none;margin-right:14px}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}