/* ══════════════════════════════════════════════════════════════════
   (주)코리아사이언스 회사소개 — 디자인 토큰

   색은 아래 다섯 개만 쓴다. 회사소개서 PDF 에서 실제로 뽑은 값이다.
   ⭐ 강조색은 Sky 하나뿐. 페이지 어디에서도 다른 강조색을 쓰지 않는다.
   ══════════════════════════════════════════════════════════════════ */
:root{
  --navy:#1F3157;        /* 기본 어두운 바탕·제목 */
  --sky:#3FA9DC;         /* ⭐ 강조 — 이것 하나 */
  --ink:#12182A;         /* 히어로 우주 바탕 */
  --paper:#F5F7FA;       /* 밝은 섹션 바탕 */
  --grey:#8A94A6;        /* 보조 텍스트 */

  --line:#E1E6ED;
  --white:#fff;
  --shadow:0 18px 50px rgba(18,24,42,.10);
  --wrap:1180px;
  --sans:"Pretendard Variable",Pretendard,"Noto Sans KR","Apple SD Gothic Neo",
         "맑은 고딕","Malgun Gothic",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{
  margin:0;background:var(--white);color:var(--navy);font-family:var(--sans);
  font-size:16px;line-height:1.7;word-break:keep-all;overflow-wrap:break-word;
  -webkit-text-size-adjust:100%;overflow-x:clip;
}
img{max-width:100%;display:block}
a{color:inherit}
button{font:inherit;color:inherit;cursor:pointer}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;z-index:100;background:var(--navy);color:#fff;padding:10px 16px;border-radius:8px}
:focus-visible{outline:3px solid var(--sky);outline-offset:3px}

h1,h2,h3{letter-spacing:-.03em;line-height:1.22;margin:0}
h2{font-size:clamp(26px,3.6vw,42px);font-weight:800}
.label{font-size:12px;font-weight:800;letter-spacing:.22em;text-transform:uppercase;
  color:var(--sky);margin:0 0 10px}
.center{text-align:center}
.section-sub{color:var(--grey);margin:14px 0 0;font-size:16.5px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:50px;padding:0 26px;border-radius:99px;border:1.5px solid transparent;
  font-weight:750;text-decoration:none;transition:background .18s,border-color .18s,color .18s,transform .1s}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--sky);border-color:var(--sky);color:#fff}
.btn-primary:hover{background:#2f93c6;border-color:#2f93c6}
.btn-ghost{border-color:rgba(255,255,255,.42);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px}

/* ── 1. 내비게이션 ───────────────────────────────────── */
.nav{position:fixed;inset:0 0 auto;z-index:50;transition:background .3s,box-shadow .3s,border-color .3s;
  border-bottom:1px solid transparent}
.nav-in{max-width:var(--wrap);margin:0 auto;padding:0 24px;height:72px;
  display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:#fff}
.brand-mark{width:38px;height:38px;border-radius:11px;background:var(--sky);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:20px;flex:0 0 auto}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:15px;letter-spacing:.02em}
.brand-text small{font-size:11px;opacity:.72}
.nav-links{display:flex;gap:26px;margin-left:auto;font-size:15px;font-weight:600}
.nav-links a{text-decoration:none;color:rgba(255,255,255,.86);position:relative;padding:6px 0}
.nav-links a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;
  background:var(--sky);transition:right .25s}
.nav-links a:hover::after,.nav-links a.on::after{right:0}
.nav-cta{text-decoration:none;font-size:14px;font-weight:750;color:#fff;
  border:1.5px solid rgba(255,255,255,.4);border-radius:99px;padding:9px 16px;white-space:nowrap}
.nav-cta:hover{background:rgba(255,255,255,.12)}
.nav-toggle{display:none;background:none;border:0;padding:8px;margin-left:auto}
.nav-toggle span{display:block;width:24px;height:2px;background:#fff;margin:5px 0;transition:.25s}

.nav.solid{background:rgba(255,255,255,.94);backdrop-filter:blur(10px);
  border-bottom-color:var(--line);box-shadow:0 2px 20px rgba(18,24,42,.06)}
.nav.solid .brand,.nav.solid .nav-links a{color:var(--navy)}
.nav.solid .nav-links a{color:#54607a}
.nav.solid .nav-cta{color:var(--navy);border-color:var(--line)}
.nav.solid .nav-cta:hover{background:var(--paper)}
.nav.solid .nav-toggle span{background:var(--navy)}

/* ── 2. 히어로 ───────────────────────────────────────── */
.hero{position:relative;min-height:100svh;display:grid;place-items:center;
  background:var(--ink);overflow:hidden;isolation:isolate}
.hero-canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.hero-veil{position:absolute;inset:0;
  background:radial-gradient(120% 78% at 50% 42%,transparent 32%,rgba(18,24,42,.62) 78%,rgba(18,24,42,.94) 100%)}
.hero-in{position:relative;text-align:center;color:#fff;padding:96px 24px 120px;max-width:900px}
.hero .eyebrow{color:var(--sky);font-size:13.5px;font-weight:800;letter-spacing:.2em;margin:0 0 18px}
.hero h1{font-size:clamp(44px,8.4vw,96px);font-weight:800;letter-spacing:-.045em}
.hero h1 em{font-style:normal;color:var(--sky)}
.hero-sub{margin:22px 0 0;color:rgba(255,255,255,.78);font-size:clamp(14px,1.7vw,18px)}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin:38px 0 0}
.hero-cue{position:absolute;left:50%;bottom:30px;transform:translateX(-50%);
  width:26px;height:42px;border:2px solid rgba(255,255,255,.34);border-radius:99px;
  display:grid;place-items:start center;padding-top:8px}
.hero-cue span{width:3px;height:8px;border-radius:2px;background:var(--sky);
  animation:cue 1.7s ease-in-out infinite}
@keyframes cue{0%,100%{transform:translateY(0);opacity:1}60%{transform:translateY(12px);opacity:.15}}

/* ── 3. 숫자 ─────────────────────────────────────────── */
.stats{background:var(--navy);color:#fff;padding:56px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat b{display:block;font-size:clamp(30px,4.4vw,52px);font-weight:800;letter-spacing:-.04em;
  font-variant-numeric:tabular-nums}
.stat span{display:block;margin-top:6px;font-size:14px;color:rgba(255,255,255,.62)}

/* ── 4. 회사 소개 ────────────────────────────────────── */
.about{padding:110px 0}
.about-grid{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:64px;align-items:start}
.about-body p{margin:0 0 20px;color:#48546e;font-size:17px}
.about-body p:last-child{margin-bottom:0}

/* ── 5. 교육 분야 ────────────────────────────────────── */
.fields{background:var(--paper);padding:110px 0}
.field-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px;margin-top:48px}
.field{background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px 24px;
  transition:transform .2s,box-shadow .2s,border-color .2s}
.field:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfd9e6}
.field-no{display:block;font-size:12px;font-weight:800;letter-spacing:.16em;color:var(--sky);margin-bottom:14px}
.field h3{font-size:19px;font-weight:800;margin:0 0 8px}
.field p{margin:0;color:var(--grey);font-size:14.5px;line-height:1.65}

/* ── 6. 자료실 ───────────────────────────────────────── */
.docs{padding:110px 0}
.doc-bar{display:flex;gap:12px;align-items:center;justify-content:center;flex-wrap:wrap;margin:44px 0 26px}
.seg{display:inline-flex;background:var(--paper);border:1px solid var(--line);border-radius:99px;padding:5px}
.seg button{border:0;background:none;border-radius:99px;padding:10px 22px;font-weight:700;
  font-size:15px;color:#5b6780;min-height:42px;transition:background .18s,color .18s}
.seg button.on{background:var(--navy);color:#fff}
.seg.small button{padding:8px 16px;font-size:14px;min-height:38px}
.seg.wide{display:flex;flex-wrap:wrap;justify-content:center;margin:34px auto 30px}
.doc-bar .btn-ghost{border-color:var(--line);color:var(--navy)}
.doc-bar .btn-ghost:hover{background:var(--paper)}

.viewer{position:relative;display:grid;place-items:center;background:var(--paper);
  border:1px solid var(--line);border-radius:20px;padding:26px;min-height:340px}
.v-stage{width:min(560px,100%);aspect-ratio:1/1.414;display:grid;place-items:center}
.v-stage img{width:100%;height:100%;object-fit:contain;border-radius:6px;
  box-shadow:0 10px 34px rgba(18,24,42,.16);background:#fff;cursor:zoom-in}
.v-nav{position:absolute;top:50%;transform:translateY(-50%);width:46px;height:46px;border-radius:50%;
  border:1px solid var(--line);background:#fff;font-size:24px;line-height:1;color:var(--navy);
  box-shadow:0 4px 14px rgba(18,24,42,.10)}
.v-nav:hover{background:var(--navy);color:#fff;border-color:var(--navy)}
.v-nav.prev{left:14px} .v-nav.next{right:14px}
.v-nav:disabled{opacity:.3;cursor:not-allowed}
.v-count{position:absolute;left:50%;bottom:14px;transform:translateX(-50%);
  background:rgba(31,49,87,.9);color:#fff;font-size:13px;font-weight:700;
  padding:5px 14px;border-radius:99px;font-variant-numeric:tabular-nums}
.v-zoom{position:absolute;right:16px;top:16px;width:38px;height:38px;border-radius:10px;
  border:1px solid var(--line);background:#fff;font-size:15px}
.v-zoom:hover{background:var(--navy);color:#fff}

.v-rail{display:flex;gap:9px;overflow-x:auto;padding:16px 2px 6px;scrollbar-width:thin}
.v-rail img{width:62px;flex:0 0 auto;border-radius:4px;border:2px solid transparent;
  cursor:pointer;background:#fff;box-shadow:0 2px 8px rgba(18,24,42,.10)}
.v-rail img.on{border-color:var(--sky)}

/* ── 7. 인증·수상 ────────────────────────────────────── */
/* 대표 교구 - 사진 자체가 설명이라 글은 붙이지 않는다. 원본이 흰 바탕이라 카드도 흰색. */
.kits{background:var(--paper);padding:110px 0}
/* 설명이 붙은 칸과 안 붙은 칸이 섞여 있다. align-items:start 가 없으면
   설명 없는 칸이 줄 높이에 맞춰 늘어나 사진 아래가 흰 여백으로 남는다. */
.kit-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:18px;margin-top:48px;align-items:start}
.kit{margin:0;background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease}
.kit img{display:block;width:100%;aspect-ratio:1/1;object-fit:contain;background:#fff}
@media(hover:hover){.kit:hover{transform:translateY(-4px);box-shadow:0 12px 30px rgba(12,40,64,.12)}}
/* 행사용 기획 상품 한 칸만 이름표를 붙인다(나머지는 사진에 코드가 찍혀 있다). */
.kit.promo{border-color:var(--sky);box-shadow:0 6px 20px rgba(63,169,220,.16)}
.kit.lead{border-color:var(--sky);box-shadow:0 6px 20px rgba(63,169,220,.16)}
.kit figcaption{padding:12px 14px 14px;font-size:13.5px;line-height:1.5;color:var(--grey);
  border-top:1px solid var(--line)}
.kit .tag{display:inline-block;margin-right:7px;padding:2px 8px;border-radius:999px;
  background:var(--sky);color:#fff;font-size:11.5px;font-weight:800;letter-spacing:.02em;
  vertical-align:1px}
.certs{background:var(--paper);padding:110px 0}
.cert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:18px}
.cert{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;
  padding:0;text-align:left;transition:transform .2s,box-shadow .2s,border-color .2s;display:block}
.cert:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfd9e6}
.cert img{width:100%;aspect-ratio:1/1.36;object-fit:cover;object-position:top center;background:#fff}
.cert-cap{padding:13px 14px 15px;border-top:1px solid var(--line)}
.cert-cap b{display:block;font-size:14px;font-weight:750;line-height:1.4}
.cert-cap span{display:block;margin-top:3px;font-size:12px;color:var(--grey)}

.partners{margin-top:56px;padding-top:34px;border-top:1px solid var(--line)}
.partners h3{font-size:15px;font-weight:800;color:var(--grey);letter-spacing:.02em;margin:0 0 14px}
.partners ul{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin:0;padding:0}
.partners li{background:#fff;border:1px solid var(--line);border-radius:99px;
  padding:9px 18px;font-size:14.5px;font-weight:650}

/* ── 8. 문의 ─────────────────────────────────────────── */
.contact{background:var(--navy);color:#fff;padding:110px 0}
.contact-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:64px;align-items:center}
.contact h2{color:#fff}
.contact .label{color:var(--sky)}
.contact .section-sub{color:rgba(255,255,255,.66)}
.contact-cta{display:flex;gap:12px;flex-wrap:wrap;margin:32px 0 0}
.contact-info{margin:0;display:grid;gap:2px}
.contact-info>div{display:grid;grid-template-columns:88px 1fr;gap:16px;
  padding:15px 0;border-bottom:1px solid rgba(255,255,255,.13)}
.contact-info dt{color:rgba(255,255,255,.5);font-size:13.5px;font-weight:700}
.contact-info dd{margin:0;font-size:15.5px}

.foot{background:var(--ink);color:rgba(255,255,255,.6);padding:30px 0;font-size:13.5px}
.foot-in{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center}
.foot b{color:#fff;display:block;font-size:14.5px;letter-spacing:.04em}
.foot span{display:block}

/* ── 크게 보기 ───────────────────────────────────────── */
.lightbox{position:fixed;inset:0;z-index:80;background:rgba(10,14,24,.94);
  display:none;place-items:center;padding:64px 20px}
.lightbox.on{display:grid}
.lightbox img{max-width:min(1100px,94vw);max-height:84vh;object-fit:contain;
  border-radius:6px;box-shadow:0 30px 80px rgba(0,0,0,.6);background:#fff}
.lb-close{position:absolute;top:18px;right:18px;width:46px;height:46px;border-radius:12px;
  border:1px solid rgba(255,255,255,.24);background:rgba(255,255,255,.08);color:#fff;font-size:18px}
.lb-close:hover{background:rgba(255,255,255,.2)}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);width:52px;height:52px;border-radius:50%;
  border:1px solid rgba(255,255,255,.24);background:rgba(255,255,255,.08);color:#fff;font-size:28px;line-height:1}
.lb-nav:hover{background:rgba(255,255,255,.2)}
.lb-nav.prev{left:20px} .lb-nav.next{right:20px}
.lb-cap{position:absolute;left:0;right:0;bottom:20px;text-align:center;color:rgba(255,255,255,.8);
  font-size:14.5px;margin:0;padding:0 24px}

/* ── 반응형 ──────────────────────────────────────────── */
@media (max-width:900px){
  html{scroll-padding-top:64px}
  .nav-in{height:64px;gap:14px}
  .nav-links{position:fixed;inset:64px 0 auto;background:rgba(255,255,255,.98);
    flex-direction:column;gap:0;padding:8px 0 16px;margin:0;
    border-bottom:1px solid var(--line);display:none}
  .nav-links.open{display:flex}
  .nav-links a{color:var(--navy);padding:14px 24px;font-size:16px}
  .nav-links a::after{display:none}
  .nav-cta{display:none}
  .nav-toggle{display:block}
  .about-grid,.contact-grid{grid-template-columns:1fr;gap:34px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:30px 16px}
  .about,.fields,.kits,.docs,.certs,.contact{padding:76px 0}
  .viewer{padding:14px}
  .v-nav{width:40px;height:40px;font-size:21px}
  .v-nav.prev{left:6px} .v-nav.next{right:6px}
  .cert-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px}
  .kit-grid{grid-template-columns:repeat(auto-fill,minmax(136px,1fr));gap:12px}
  .lightbox{padding:56px 12px}
  .lb-nav{width:44px;height:44px;font-size:24px}
  .lb-nav.prev{left:8px} .lb-nav.next{right:8px}
  .contact-info>div{grid-template-columns:74px 1fr;gap:12px}
}
@media (max-width:480px){
  .wrap{padding:0 16px}
  .hero-in{padding:80px 18px 110px}
  .seg button{padding:9px 14px;font-size:14px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important}
}
@media print{
  .nav,.hero,.v-nav,.v-zoom,.lightbox,.hero-cue{display:none!important}
  body{color:#000}
}