/* ===== Design tokens ===== */
:root{
  --bg:#FCFCFC;
  --bg-sub:#F0F4F8;
  --accent:#00B074;
  --accent-dark:#00925f;
  --text:#111827;
  --text-mute:#4B5563;
  --white:#FFFFFF;
  --radius:12px;
  --gap-img-text:16px;
  --section-gap:48px;
  --side-pad:24px;
  --icon:24px;
  --btn-pad-x:20px;
  --btn-min-h:44px;
  --container:1180px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:'Pretendard',-apple-system,BlinkMacSystemFont,'Malgun Gothic',sans-serif;
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none;margin:0;padding:0}
button{font-family:inherit;cursor:pointer}

h1,h2,h3,h4{font-weight:700;margin:0;line-height:1.35;letter-spacing:-0.01em}
h1{font-size:29px}
h2{font-size:22px}
h3{font-size:18px}
h4{font-size:16px}
p{margin:0 0 1em;line-height:1.6}
p:last-child{margin-bottom:0}

@media (min-width:768px){
  h1{font-size:44px}
  h2{font-size:32px}
  h3{font-size:22px}
  h4{font-size:18px}
}

.container{
  max-width:var(--container);
  margin:0 auto;
  padding:0 var(--side-pad);
}
@media (min-width:768px){
  .container{padding:0 40px}
}

.section{
  padding:var(--section-gap) 0;
}
.section-sub{background:var(--bg-sub)}

.section-head{margin-bottom:32px;text-align:center}
.section-head .eyebrow{display:none}
.section-title{font-weight:700;color:var(--text)}
.section-desc{font-weight:400;color:var(--text-mute);margin-top:12px;font-size:16px}

/* ===== Buttons / CTA ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:var(--btn-min-h);
  padding:10px var(--btn-pad-x);
  border-radius:999px;
  font-weight:700;
  font-size:16px;
  border:1px solid transparent;
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:var(--white)}
.btn-primary:hover{background:var(--accent-dark)}
.btn-outline{background:transparent;color:var(--accent);border-color:var(--accent)}
.btn-outline:hover{background:var(--accent);color:var(--white)}
.cta-group{display:flex;flex-wrap:wrap;gap:12px}
.cta-group.center{justify-content:center}

/* ===== Icons ===== */
.icon{width:var(--icon);height:var(--icon);flex:0 0 var(--icon)}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;left:0;right:0;z-index:100;
  background:rgba(252,252,252,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid #E5E9EF;
}
.site-header .container{
  display:flex;align-items:center;justify-content:space-between;
  height:64px;
}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:18px;color:var(--text)}
.brand .logo-mark{width:28px;height:28px;flex:0 0 28px}

.gnb{display:none}
.gnb ul{display:flex;align-items:center;gap:28px}
.gnb a{display:flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--text)}
.gnb a:hover{color:var(--accent)}
.gnb .icon{width:18px;height:18px;flex:0 0 18px}

.header-cta{display:none}

.hamburger{
  display:flex;align-items:center;justify-content:center;
  width:44px;height:44px;
  background:none;border:none;
  flex-direction:column;gap:5px;
}
.hamburger span{display:block;width:22px;height:2px;background:var(--text);transition:transform .25s ease,opacity .25s ease}
.hamburger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.is-open span:nth-child(2){opacity:0}
.hamburger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.mobile-nav{
  max-height:0;overflow:hidden;
  transition:max-height .3s ease;
  background:var(--white);
  border-bottom:1px solid #E5E9EF;
}
.mobile-nav.is-open{max-height:400px}
.mobile-nav ul{padding:8px var(--side-pad) 16px}
.mobile-nav li{border-top:1px solid #EEF1F5}
.mobile-nav a{display:flex;align-items:center;min-height:var(--btn-min-h);font-size:16px;font-weight:600}
.mobile-nav a.is-cta{color:var(--accent)}

@media (min-width:1024px){
  .gnb{display:block}
  .header-cta{display:block}
  .hamburger,.mobile-nav{display:none}
}

/* ===== Hero ===== */
.hero{
  position:relative;
  min-height:560px;
  display:flex;align-items:center;
  color:var(--text);
  overflow:hidden;
}
.hero-bg{position:absolute;inset:0}
.hero-bg img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-overlay{display:none}
.hero .container{position:relative;z-index:2}
.hero-eyebrow{font-size:14px;font-weight:700;letter-spacing:.08em;color:#004d2d;margin-bottom:16px}
.hero h1{color:var(--white);margin-bottom:16px;font-size:48px}
.hero .sub-copy{font-size:16px;font-weight:600;color:var(--white);max-width:520px;margin-bottom:28px}
.hero .btn-primary{background:#004d2d}
.hero .btn-primary:hover{background:#003a22}
.hero .btn-outline{color:#004d2d;border-color:#004d2d}
.hero .btn-outline:hover{background:#004d2d;color:var(--white)}
@media (min-width:768px){.hero{min-height:640px}.hero h1{font-size:88px}.hero .sub-copy{font-size:18px}}

/* ===== Moving concept text ===== */
.concept{text-align:center}
.concept-title{margin-bottom:40px}
.moving-text{position:relative;max-width:760px;margin:0 auto;min-height:3.4em}
.moving-text p{
  position:absolute;inset:0;
  font-size:18px;font-weight:600;color:var(--text-mute);
  opacity:0;
  transition:opacity 1s ease;
}
.moving-text p.is-active{opacity:1}
@media (min-width:768px){.moving-text p{font-size:22px}}

/* ===== Fade in on scroll ===== */
.fade-in{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}
.fade-in.is-visible{opacity:1;transform:translateY(0)}

/* ===== Card grids ===== */
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:1fr}
.grid-4{grid-template-columns:repeat(2,1fr)}
.grid-6{grid-template-columns:repeat(2,1fr)}
@media (min-width:768px){
  .grid-3{grid-template-columns:repeat(3,1fr)}
  .grid-4{grid-template-columns:repeat(4,1fr)}
  .grid-6{grid-template-columns:repeat(3,1fr)}
}

/* Portfolio / total-care card w/ hover overlay + link indicator */
.media-card{
  position:relative;
  border-radius:var(--radius);
  overflow:hidden;
  aspect-ratio:4/3;
  background:var(--bg-sub);
  display:block;
}
.media-card img{width:100%;height:100%;object-fit:cover}
.media-card .overlay{
  position:absolute;inset:0;
  display:flex;align-items:flex-end;
  padding:16px;
  background:linear-gradient(180deg,rgba(17,24,39,0) 40%,rgba(17,24,39,.78) 100%);
}
.media-card .overlay-title{color:var(--white);font-weight:700;font-size:16px;
  transform:translateY(8px);opacity:.92;transition:transform .3s ease;
}
.media-card:hover .overlay-title{transform:translateY(0)}
.media-card .link-indicator{
  position:absolute;top:12px;right:12px;
  width:32px;height:32px;border-radius:50%;
  background:rgba(255,255,255,.92);
  display:flex;align-items:center;justify-content:center;
  transition:transform .3s ease;
}
.media-card:hover .link-indicator{transform:rotate(45deg)}
.media-card .link-indicator svg{width:16px;height:16px;stroke:var(--accent)}

.more-link{display:flex;justify-content:center;margin-top:32px}

/* ===== Swipe slider (mobile) ===== */
.swipe-track{
  display:flex;
  gap:16px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:none;
  padding-bottom:4px;
}
.swipe-track::-webkit-scrollbar{display:none}
.swipe-track .slide{flex:0 0 100%;scroll-snap-align:start}
.dots{display:flex;justify-content:center;gap:8px;margin-top:16px}
.dots .dot{width:8px;height:8px;border-radius:50%;background:#D1D9E0}
.dots .dot.is-active{background:var(--accent)}

@media (min-width:768px){
  .swipe-track{overflow:visible;display:grid;grid-template-columns:repeat(3,1fr)}
  .swipe-track .slide{flex:auto}
  .dots{display:none}
}

/* Solution card (edu/healing/business) */
.solution-card{
  position:relative;
  border-radius:var(--radius);
  background:var(--white);
  border:1px solid #E5E9EF;
  overflow:hidden;
  height:100%;
}
.solution-card .thumb{aspect-ratio:16/10;background:var(--bg-sub);overflow:hidden}
.solution-card .thumb img{width:100%;height:100%;object-fit:cover}
.solution-card .body{padding:20px}
.solution-card h3{margin-bottom:6px}
.solution-card .tag{color:var(--accent);font-size:13px;font-weight:700}
.solution-card p{
  color:var(--text-mute);font-size:15px;margin-top:var(--gap-img-text);
}
@media (min-width:768px){
  .solution-card p{
    position:absolute;inset:auto 0 0 0;
    background:rgba(17,24,39,.86);color:var(--white);
    padding:20px;margin:0;
    transform:translateY(100%);
    transition:transform .3s ease;
  }
  .solution-card:hover p{transform:translateY(0)}
}

/* Spec table (hardware) */
.spec-table{width:100%;border-collapse:collapse;margin-top:12px;font-size:14px}
.spec-table th,.spec-table td{border:1px solid #E5E9EF;padding:10px 12px;text-align:left}
.spec-table th{background:var(--bg-sub);font-weight:700;white-space:nowrap}
@media (max-width:767px){
  .spec-table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;white-space:nowrap}
}

/* About/value card */
.value-card{text-align:left;background:var(--white);border:1px solid #E5E9EF;border-radius:var(--radius);padding:24px;height:100%}
.value-card .icon-wrap{width:48px;height:48px;border-radius:var(--radius);background:var(--bg-sub);display:flex;align-items:center;justify-content:center;margin-bottom:var(--gap-img-text)}
.value-card .icon-wrap .icon{width:26px;height:26px;flex:0 0 26px;stroke:var(--accent);fill:none}
.value-card h3{margin-bottom:8px}
.value-card p{color:var(--text-mute);font-size:15px}

/* ===== FAQ accordion ===== */
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--white);border:1px solid #E5E9EF;border-radius:var(--radius);overflow:hidden}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  padding:18px 20px;min-height:var(--btn-min-h);
  background:none;border:none;text-align:left;
  font-weight:700;font-size:16px;color:var(--text);
}
.faq-q .plus{width:var(--icon);height:var(--icon);flex:0 0 var(--icon);position:relative}
.faq-q .plus::before,.faq-q .plus::after{content:"";position:absolute;background:var(--accent);border-radius:2px}
.faq-q .plus::before{left:4px;right:4px;top:11px;height:2px}
.faq-q .plus::after{top:4px;bottom:4px;left:11px;width:2px;transition:transform .25s ease}
.faq-item.is-open .plus::after{transform:scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 20px 20px;color:var(--text-mute);font-size:15px}
.faq-item.is-open .faq-a{max-height:400px}

/* ===== Consult CTA section (above footer) ===== */
.consult-cta{background:var(--text);color:var(--white);text-align:center}
.consult-cta h2{color:var(--white)}
.consult-cta .section-desc{color:#D1D9E0}
.consult-cta .cta-group{justify-content:center;margin-top:24px}

/* ===== Footer ===== */
.site-footer{background:var(--bg-sub);padding:40px 0}
.footer-brand{font-weight:700;font-size:18px;margin-bottom:12px}
.footer-info p{font-size:14px;color:var(--text-mute);margin:0 0 4px}
.footer-links{display:flex;gap:20px;margin:20px 0}
.footer-links a{font-size:14px;font-weight:600;display:flex;align-items:center;gap:6px}
.footer-links .icon{width:18px;height:18px;flex:0 0 18px}
.footer-sites{border-top:1px solid rgba(0,0,0,.1);padding-top:16px;margin-top:8px}
.footer-sites-label{font-size:12px;color:#9AA5B1;margin:0 0 8px}
.footer-sites ul{display:flex;flex-wrap:wrap;gap:8px 16px;list-style:none;margin:0;padding:0}
.footer-sites a{font-size:13px;color:var(--text-mute);text-decoration:underline}
.footer-copy{font-size:12px;color:#9AA5B1;margin-top:20px}

/* ===== Page hero (sub pages) ===== */
.page-hero{padding:56px 0 32px;text-align:center;background:var(--bg-sub)}
.page-hero h1{margin-bottom:12px}
.page-hero p{color:var(--text-mute);max-width:640px;margin:0 auto}

/* Utility */
.text-center{text-align:center}
.mt-0{margin-top:0}
.mb-0{margin-bottom:0}
@media (min-width:768px){.mobile-break{display:none}}