:root{color-scheme:light;--paper:#f7f8f4;--ink:#1c302c;--muted:#586960;--line:#dce3da;--accent:#236e56}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:100px}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;word-break:keep-all;overflow-wrap:anywhere}
img{display:block;max-width:100%;height:auto}
a{color:var(--accent);text-underline-offset:4px}
button,select{font:inherit}
button,a,select,summary{-webkit-tap-highlight-color:transparent}
button,summary{cursor:pointer}
a:focus-visible,button:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #25825f;outline-offset:5px}
[hidden]{display:none!important}
.shell{width:min(1120px,calc(100% - 64px));margin-inline:auto}
.site-header{border-bottom:1px solid var(--line)}
.nav{min-height:88px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;font-weight:750;color:var(--ink);text-decoration:none;white-space:nowrap}
.brand img{border-radius:9px;width:34px}
.nav nav{display:flex;align-items:center;gap:22px;font-size:14px}
.nav nav a{text-decoration:none;color:var(--muted)}
.nav nav a:hover,.nav nav a[aria-current]{color:var(--ink)}
select{background:transparent;border:1px solid var(--line);border-radius:8px;padding:6px;color:var(--ink);max-width:100%}
.hero{display:grid;grid-template-columns:1.2fr 1fr;align-items:center;gap:64px;padding:72px 0 90px}
.eyebrow{color:var(--accent);font-size:13px;font-weight:750;letter-spacing:.06em;margin:0 0 18px}
h1,h2,h3{line-height:1.22;letter-spacing:-.045em;margin:0;font-weight:750}
h1{font-size:clamp(36px,4.2vw,58px)}
h2{font-size:clamp(28px,3vw,38px)}
h3{font-size:23px}
.lede{font-size:19px;color:var(--muted);max-width:640px;margin:26px 0}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:32px}
.button{display:inline-flex;align-items:center;justify-content:center;text-align:center;min-height:48px;padding:11px 19px;background:var(--ink);color:white;border:1px solid var(--ink);border-radius:10px;text-decoration:none;font-weight:650;font-size:14px}
.button.secondary{background:transparent;color:var(--ink);border-color:#b8c6bd}
.text-button{background:none;border:0;padding:4px 0;color:var(--accent);font-weight:650;font-size:15px}
.fine,figcaption{color:var(--muted);font-size:12px}
.hero-stage{margin:0;background:#e9eee4;border-radius:28px;padding:32px 24px 20px;text-align:center}
.phone{width:min(248px,100%);margin:auto;border:7px solid #21352e;border-radius:34px;overflow:hidden;background:#21352e}
.phone img{width:100%;height:auto}
.hero-stage figcaption{margin-top:17px}
.section{padding:76px 0;border-top:1px solid var(--line)}
.section-copy{max-width:680px;color:var(--muted);margin:22px 0 34px;font-size:17px}
.challenge-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:36px}
.challenge{border:1px solid var(--line);border-radius:20px;overflow:hidden;background:#fff}
.capture{padding:26px;background:#edf0e8}
.capture img{width:185px;max-width:100%;height:auto;margin:auto;border:5px solid #21352e;border-radius:24px}
.card-copy{padding:25px}
.card-copy p,.mode-copy p{font-size:14px;color:var(--muted);margin-bottom:0}
.mode-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;margin-top:38px}
.mode-capture{background:#e9eee4;border-radius:16px;padding:20px}
.mode-capture img{width:100%;height:auto;border-radius:15px}
.mode-copy{padding-top:22px}
.mode-copy h3{font-size:20px}
.pro-section{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}
.pro-panel{background:#e9eee4;border-radius:20px;padding:26px}
.pro-list{padding:0;margin:0;list-style:none}
.pro-list li{padding:14px 0;border-bottom:1px solid #d2dccd}
.pro-list li:last-child{border:0}
.pro-list strong{display:block}
.pro-list span{font-size:14px;color:var(--muted)}
.updates{display:grid;grid-template-columns:1fr 1fr;gap:32px;margin-top:36px}
.updates article{padding:25px 0;border-top:1px solid var(--line)}
.update-meta{display:flex;flex-wrap:wrap;gap:12px;font-size:12px;color:var(--muted);margin-bottom:16px}
.updates p,.trust p{color:var(--muted)}
.trust{display:grid;grid-template-columns:1fr 1fr;gap:70px}
.trust h2{font-size:28px}
.footer{padding:36px 0 48px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:30px;color:var(--muted);font-size:13px}
.footer p{margin:8px 0}
.footer nav{display:grid;gap:8px}
.footer a{color:var(--muted);text-decoration:none}
.page-heading{padding:70px 0 55px;max-width:850px}
.page-heading h1{font-size:clamp(34px,4vw,52px)}
.document-layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:60px;padding-bottom:70px}
.toc{position:sticky;top:30px;font-size:13px;border-top:1px solid var(--line);padding-top:22px}
.toc ol{padding-left:22px}
.toc li{margin:8px 0}
.toc a{color:var(--muted);text-decoration:none}
.document{min-width:0}
.document h2{font-size:24px;margin:42px 0 16px;line-height:1.45}
.document h3{font-size:19px;margin-top:24px}
.document p,.document li{color:var(--muted)}
.document ul{padding-left:22px}
.document section:first-child h2{margin-top:0}
.document a{overflow-wrap:anywhere}
.document .lead{font-size:18px}
.document .meta,.document .updated{font-size:13px}
.faq,.support-document,.narrow{max-width:760px}
.faq{border-top:1px solid var(--line);padding:38px 0}
.faq h2{font-size:28px;margin-bottom:20px}
details{border-bottom:1px solid var(--line);padding:19px 0}
summary{font-weight:650}
details p{color:var(--muted);margin-bottom:0}
.support-document{padding:25px 0 75px}
.steps{padding-left:24px}
.steps li{margin:15px 0}
dialog{width:min(620px,calc(100% - 28px));max-height:92dvh;overflow:auto;border:1px solid var(--line);border-radius:20px;background:var(--paper);padding:20px;color:var(--ink)}
dialog::backdrop{background:#14241fbc}
.dialog-top{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:15px}
.dialog-top h2{font-size:19px}
.dialog-top .button{min-height:40px;flex-shrink:0}
video{display:block;max-width:100%;width:auto;max-height:62dvh;margin:auto;border-radius:12px}
.skip{position:fixed;top:-80px;left:20px;padding:10px;background:white;z-index:20}
.skip:focus{top:12px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:900px){.nav{flex-wrap:wrap;padding-block:20px;gap:15px}
.nav nav{gap:20px}
.hero{gap:35px}
.hero h1{font-size:42px}
.challenge-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.mode-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:35px}
.mode-capture img{width:185px;margin:auto}
.document-layout{grid-template-columns:190px minmax(0,1fr);gap:30px}
.pro-section{gap:30px}
}
@media(max-width:600px){.shell{width:calc(100% - 36px)}
.nav{gap:17px}
.nav nav{width:100%;gap:12px;justify-content:space-between;font-size:11px}
.language select{font-size:11px;padding:5px 2px}
.hero{grid-template-columns:1fr;gap:36px;padding:42px 0 50px}
.hero h1{font-size:clamp(32px,8.2vw,44px)}
.lede{font-size:17px;margin:20px 0}
.actions{margin-top:24px;gap:8px}
.actions .button{flex:1;padding:12px 8px;font-size:12px}
.hero-stage{padding:25px 20px 17px}
.phone{width:220px}
.section{padding:48px 0}
.challenge-grid{grid-template-columns:1fr;gap:25px}
.capture img{width:190px}
.card-copy{padding:23px}
.mode-grid{gap:24px 14px}
.mode-capture{padding:12px}
.mode-capture img{border-radius:10px}
.mode-copy h3{font-size:18px}
.mode-copy p{font-size:13px}
.pro-section,.updates,.trust{grid-template-columns:1fr;gap:25px}
.updates{gap:0}
.footer{flex-direction:column;gap:24px}
.page-heading{padding:42px 0}
.document-layout{display:block;padding-bottom:45px}
.toc{position:static;margin-bottom:35px}
.toc ol{columns:2;column-gap:25px;font-size:11px}
.toc li{break-inside:avoid}
.document h2{font-size:22px}
.document{font-size:15px}
.page-heading h1{font-size:34px}
.dialog-top h2{font-size:16px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}
}

/* 2.8 바람 과녁으로 도전이 다섯 — 넓은 화면 5칸, 중간 3칸(3+2), 태블릿 2칸에서는 새 게임 카드가 한 줄을 쓴다(1+2+2). */
.challenge-grid{grid-template-columns:repeat(5,minmax(0,1fr))}
@media(max-width:1180px){.challenge-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:900px){.challenge-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.challenge-grid>.challenge:first-child{grid-column:1/-1}}
@media(max-width:600px){.challenge-grid{grid-template-columns:1fr}}