@import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.css");
@import url("https://fonts.googleapis.com/css2?family=Jua&display=swap");

:root{
  --h: 280;
  --bg:      hsl(var(--h) 18% 97%);
  --surface: hsl(var(--h) 16% 99%);
  --ink:     hsl(var(--h) 24% 16%);
  --muted:   hsl(var(--h) 10% 44%);
  --accent:  hsl(var(--h) 34% 40%);
  --line:    hsl(var(--h) 14% 88%);
}

*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Pretendard",system-ui,sans-serif;line-height:1.8}
h1,h2,h3{font-family:"Jua","Pretendard",system-ui,sans-serif;font-weight:400;line-height:1.3;margin:0 0 .6em}
p{margin:0 0 1em}
a{color:inherit}
img{max-width:100%;display:block}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px}

.site-header{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1.4rem clamp(1rem,4vw,2.5rem)}
.site-header__brand{font-weight:700;font-size:1rem;text-decoration:none;color:var(--ink)}
.site-header__menu{display:flex;gap:1.4rem;align-items:center}
.site-header__burger{display:none;flex:none;width:30px;height:30px;border:0;background:none;padding:0;cursor:pointer;flex-direction:column;justify-content:center;gap:5px}
.site-header__burger span{display:block;height:2px;background:var(--ink);border-radius:2px}
@media (max-width:640px){
  .site-header{flex-wrap:wrap;gap:.6rem}
  .site-header__brand{margin-right:auto}
  .site-header__burger{display:flex}
  .site-header__menu{display:none;width:100%;flex-direction:column;align-items:stretch;gap:0;margin-top:.8rem;padding-top:.6rem;border-top:1px solid var(--line)}
  .site-header__menu.is-open{display:flex}
  .site-header__menu a{padding:.7rem 0}
}
.site-header__menu a{text-decoration:none;font-size:.9rem;color:var(--muted);font-weight:600}
.site-header__menu a:hover,.site-header__menu a:focus-visible{color:var(--accent)}
.site-header__cta{text-decoration:none;font-size:.86rem;color:var(--accent);border-bottom:1px solid var(--accent)}

.stack{max-width:38rem;margin:0 auto;padding:clamp(1rem,4vw,1.5rem)}
.stack__hero{text-align:center;padding:clamp(2rem,6vw,3rem) 0 clamp(3rem,8vw,5rem)}
.stack__hero h1{font-size:clamp(2.2rem,6vw,3.4rem)}
.stack__hero p{color:var(--muted);font-size:1.05rem}
.stack__hero img{width:100%;height:auto;border-radius:18px;aspect-ratio:1/1;object-fit:cover;margin:2rem auto 0;max-width:22rem}
.stack__ctas{display:flex;gap:.8rem;justify-content:center;flex-wrap:wrap;margin-top:1.4rem}
.stack__cta{padding:.85rem 1.7rem;border-radius:999px;text-decoration:none;font-weight:700;background:var(--accent);color:#fff}
.stack__cta--ghost{background:transparent;color:var(--accent);border:1px solid var(--accent)}

.numsec{position:relative;padding:clamp(3rem,8vw,5.5rem) 0;text-align:center}
.numsec__num{position:absolute;top:-2.2rem;left:50%;transform:translateX(-50%);font-family:"Jua",sans-serif;font-size:clamp(6rem,18vw,10rem);color:hsl(var(--h) 34% 40% / .08);z-index:0;line-height:1;pointer-events:none}
.numsec__body{position:relative;z-index:1}
.numsec img{width:100%;height:auto;border-radius:16px;aspect-ratio:1/1;object-fit:cover;margin:1.6rem auto 0;max-width:22rem}

.kwlist{list-style:none;margin:0;padding:0;display:grid;gap:.7rem}
.kwlist a{display:block;padding:1rem 1.2rem;background:var(--surface);border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--ink)}
.kwlist a:hover,.kwlist a:focus-visible{border-color:var(--accent)}
.kwlist b{display:block;font-weight:700;margin-bottom:.2rem}
.kwlist span{color:var(--muted);font-size:.88rem}

.faq details{border-bottom:1px solid var(--line);padding:1rem 0;text-align:left}
.faq summary{cursor:pointer;font-weight:700}
.faq p{color:var(--muted);margin:.6rem 0 0}

.site-footer{border-top:1px solid var(--line);padding:1.4rem clamp(1rem,4vw,2.5rem);background:var(--surface)}
.site-footer__inner{max-width:64rem;margin:0 auto;display:grid;gap:.6rem}
.site-footer__biz{color:var(--muted);font-size:.86rem;line-height:1.5}
.site-footer__biz a{color:var(--accent);text-decoration:none}
.site-footer__nav{display:flex;flex-wrap:wrap;gap:.8rem 1.2rem}
.site-footer__nav a{text-decoration:none;font-size:.88rem;color:var(--ink)}
.site-footer__copy{color:var(--muted);font-size:.8rem;margin:0}
@media (max-width:640px){
  .site-footer{padding:.9rem clamp(1rem,4vw,2.5rem)}
  .site-footer__inner{gap:.4rem}
  .site-footer__biz{font-size:.8rem;line-height:1.4}
  .site-footer__nav{gap:.5rem .8rem}
  .site-footer__nav a{font-size:.82rem}
}