/* ── 빛나온 홈페이지 v1 ─────────────────────────────── */
:root{
  --ink:#171514; --ink-2:#211E1B; --ink-3:#2A2622;
  --accent:#F1531F; --accent-bright:#F26B2A; --gold:#F5B301; --cream:#F4EEDB;
  --text:#FAF7F2; --text-dim:#B8B2A9; --hairline:rgba(244,238,219,.12);
  --card:rgba(20,17,15,.84);
  --accent-glow:rgba(241,83,31,.42);
  --font-kr:'Pretendard Variable','Pretendard',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,monospace;
  --ease:cubic-bezier(.22,1,.36,1);
  --nav-h:64px;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{font-family:var(--font-kr);background:var(--ink);color:var(--text);
  overflow-x:hidden;-webkit-font-smoothing:antialiased;
  word-break:keep-all;overflow-wrap:break-word}
img{max-width:100%;display:block}
a{color:inherit}
::selection{background:var(--accent);color:#fff}

/* ── Nav ── */
.nav{position:fixed;top:0;left:0;right:0;height:var(--nav-h);z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 clamp(20px,4vw,44px);
  background:linear-gradient(to bottom,rgba(18,15,13,.86),rgba(18,15,13,0));
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.nav-brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;
  font-weight:800;font-size:18.5px;letter-spacing:-.02em}
.nav-brand img{height:28px;width:auto}
.nav-links{display:flex;gap:clamp(16px,2.8vw,34px);list-style:none;align-items:center}
.nav-links a{text-decoration:none;font-size:16.5px;font-weight:700;color:var(--text-dim);
  transition:color .2s;padding:6px 2px;letter-spacing:-.01em}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--text)}
.nav-links a.cta-link{color:var(--accent-bright)}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}

/* ── Loader ── */
#loader{position:fixed;inset:0;z-index:100;background:var(--ink);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;
  transition:opacity .6s var(--ease)}
#loader img{height:44px}
.loader-track{width:200px;height:2px;background:rgba(255,255,255,.12);border-radius:2px;overflow:hidden}
#loader-bar{height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--gold))}
#loader-percent{font-family:var(--font-mono);font-size:12px;color:var(--text-dim)}

/* ── Frame scenes ── */
.video-frame-scene{position:relative;width:100%}
.scroll-spacer{width:100%;pointer-events:none}
.sticky-stage{position:sticky;top:0;width:100%;height:100vh;height:100svh;overflow:hidden;background:var(--ink);z-index:1}
.frame-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:1}
.stage-veil{position:absolute;inset:0;z-index:2;pointer-events:none;
  background:
   radial-gradient(120% 90% at 50% 42%,transparent 30%,rgba(15,12,10,.55) 72%,rgba(15,12,10,.88) 100%),
   linear-gradient(to bottom,rgba(15,12,10,.42) 0%,transparent 24%,transparent 60%,rgba(15,12,10,.78) 100%)}
.stage-warmth{position:absolute;inset:0;z-index:2;pointer-events:none;mix-blend-mode:soft-light;
  background:radial-gradient(70% 60% at 62% 58%,rgba(241,83,31,.22),transparent 70%)}
.scene-overlay{position:absolute;inset:0;z-index:3;pointer-events:none}
.scene-overlay>*{pointer-events:auto}
.scene-overlay [aria-hidden="true"]{pointer-events:none}

.overlay-micro{position:absolute;display:inline-flex;align-items:center;gap:.55rem;
  font-size:11px;letter-spacing:.16em;text-transform:uppercase;font-weight:600;
  color:var(--text-dim);font-variant-numeric:tabular-nums;text-shadow:0 1px 8px rgba(0,0,0,.6)}
.overlay-top-right{top:calc(var(--nav-h) + 14px);right:30px;font-family:var(--font-mono);letter-spacing:.05em}
.time-sep{opacity:.5;margin:0 2px}
.scrub-rail{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);
  width:clamp(220px,36vw,460px);height:2px;background:rgba(255,255,255,.16);border-radius:2px}
.scrub-fill{height:100%;width:0;border-radius:2px;background:linear-gradient(90deg,var(--accent),var(--cream));
  box-shadow:0 0 12px var(--accent-glow);transition:width .08s linear}
.phase-label{position:absolute;bottom:24px;left:30px;display:inline-flex;align-items:center;gap:.5rem;
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:700;color:var(--text);
  text-shadow:0 1px 10px rgba(0,0,0,.7)}
.phase-tick{width:8px;height:8px;background:var(--accent);border-radius:2px;box-shadow:0 0 10px var(--accent-glow)}

/* overlay cards */
.overlay-card{position:absolute;width:clamp(320px,27vw,400px);padding:26px 28px 24px;
  background:var(--card);border:1px solid var(--hairline);border-radius:16px;
  backdrop-filter:blur(16px) saturate(150%);-webkit-backdrop-filter:blur(16px) saturate(150%);
  box-shadow:0 24px 60px rgba(0,0,0,.5),inset 0 1px 0 rgba(244,238,219,.07);
  opacity:0;visibility:hidden;will-change:opacity,transform,filter}
.pos-left{left:clamp(30px,5vw,88px);top:32%}
.pos-right{right:clamp(30px,5vw,88px);top:38%}
.pos-left-low{left:clamp(30px,5vw,88px);top:56%}
.card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;gap:10px}
.card-label{font-size:11px;letter-spacing:.16em;text-transform:uppercase;font-weight:700;color:var(--accent)}
.card-step{font-family:var(--font-mono);font-size:11px;color:var(--text-dim)}
.card-title{font-size:clamp(21px,1.7vw,27px);font-weight:800;line-height:1.28;letter-spacing:-.02em;margin-bottom:10px;text-wrap:balance}
.card-title .em{color:var(--accent)}
.card-body{font-size:clamp(14px,1.05vw,15.5px);line-height:1.66;color:var(--text-dim)}
.card-stats{display:flex;gap:18px;margin-top:16px}
.stat b{display:block;font-family:var(--font-mono);font-size:22px;font-weight:700;letter-spacing:-.02em}
.stat b .unit{font-size:13px}
.stat span{font-size:11px;color:var(--text-dim);letter-spacing:.04em}

.badge{display:inline-block;font-size:10.5px;font-weight:700;letter-spacing:.06em;
  padding:3px 9px;border-radius:999px;background:rgba(241,83,31,.16);color:var(--accent-bright);
  border:1px solid rgba(241,83,31,.35);white-space:nowrap}
.badge.gold{background:rgba(245,179,1,.14);color:var(--gold);border-color:rgba(245,179,1,.35)}

/* ── Generic sections ── */
.section{position:relative;padding:clamp(84px,12vw,150px) clamp(20px,5vw,48px);z-index:2;background:var(--ink)}
.section.tint{background:var(--ink-2)}
.wrap{max-width:1160px;margin:0 auto}
.sec-head{max-width:640px;margin-bottom:clamp(36px,5vw,64px)}
.sec-head .k{font-size:12px;letter-spacing:.16em;text-transform:uppercase;font-weight:700;color:var(--accent);margin-bottom:14px}
.sec-head h2{font-size:clamp(28px,4vw,46px);font-weight:800;line-height:1.15;letter-spacing:-.03em;text-wrap:balance}
.sec-head h2 .em{color:var(--accent)}
.sec-head p{margin-top:16px;font-size:clamp(15px,1.3vw,17px);line-height:1.7;color:var(--text-dim);max-width:56ch}

/* problem cards */
.duo{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media (max-width:760px){.duo{grid-template-columns:1fr}}
.dev-card{border:1px solid var(--hairline);border-radius:20px;padding:30px;background:var(--ink-2)}
.dev-card .name{font-weight:800;font-size:19px;margin-bottom:6px}
.dev-card .meta{font-family:var(--font-mono);font-size:13px;color:var(--text-dim);margin-bottom:16px}
.dev-card .verdict{display:inline-block;font-weight:800;font-size:15px;color:var(--accent-bright);
  padding:8px 14px;border-radius:10px;background:rgba(241,83,31,.12)}

.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:56px}
@media (max-width:760px){.stat-row{grid-template-columns:1fr}}
.big-stat{border-top:1px solid var(--hairline);padding-top:22px}
.big-stat b{display:block;font-family:var(--font-mono);font-size:clamp(40px,5vw,58px);font-weight:700;letter-spacing:-.03em;line-height:1}
.big-stat b .unit{font-size:.45em;color:var(--text-dim);font-weight:500}
.big-stat .lb{margin-top:10px;font-size:14px;color:var(--text-dim)}
.big-stat.acc b{color:var(--accent-bright)}

/* pillars */
.pillars{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:18px}
@media (max-width:860px){.pillars{grid-template-columns:1fr}}
.pillar{border:1px solid var(--hairline);border-radius:20px;padding:30px;background:var(--ink);min-height:210px;
  display:flex;flex-direction:column;justify-content:space-between;gap:18px}
.pillar.hero-cell{background:linear-gradient(145deg,rgba(241,83,31,.16),rgba(241,83,31,.04)),var(--ink);border-color:rgba(241,83,31,.35)}
.pillar .t{font-weight:800;font-size:20px;letter-spacing:-.02em}
.pillar .d{color:var(--text-dim);font-size:14.5px;line-height:1.65}
.pillar .n{font-family:var(--font-mono);font-weight:700;font-size:clamp(30px,3.4vw,44px);letter-spacing:-.02em;color:var(--text)}
.pillar .n .unit{font-size:.5em;color:var(--text-dim)}
.pillar.hero-cell .n{color:var(--accent-bright)}

/* feature rows (앱 로드맵) */
.feat-list{display:flex;flex-direction:column}
.feat{display:grid;grid-template-columns:56px 1fr auto;gap:20px;align-items:center;
  padding:26px 6px;border-top:1px solid var(--hairline)}
.feat:last-child{border-bottom:1px solid var(--hairline)}
.feat .ic{width:44px;height:44px;border-radius:12px;background:rgba(241,83,31,.14);
  display:flex;align-items:center;justify-content:center;color:var(--accent-bright);font-size:20px}
.feat .tt{font-weight:800;font-size:17px;margin-bottom:4px}
.feat .dd{color:var(--text-dim);font-size:14px;line-height:1.6}
@media (max-width:600px){.feat{grid-template-columns:44px 1fr}.feat .badge{grid-column:2}}

/* steps (에듀블 학습 루프) */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;counter-reset:step}
@media (max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:540px){.steps{grid-template-columns:1fr}}
.step{border:1px solid var(--hairline);border-radius:18px;padding:24px;background:var(--ink)}
.step .no{font-family:var(--font-mono);font-size:12px;color:var(--accent);margin-bottom:14px;font-weight:700}
.step .tt{font-weight:800;font-size:18px;margin-bottom:8px}
.step .dd{color:var(--text-dim);font-size:14px;line-height:1.62}

/* eduble hero */
.vid-hero{position:relative;min-height:100svh;display:flex;align-items:flex-end;overflow:hidden}
.vid-hero video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.vid-hero .stage-veil{z-index:2}
.vid-hero .inner{position:relative;z-index:3;padding:clamp(24px,5vw,64px);padding-bottom:clamp(56px,8vw,96px);max-width:1160px;margin:0 auto;width:100%}
.vid-hero h1{font-size:clamp(40px,7vw,84px);font-weight:800;letter-spacing:-.04em;line-height:1.02;text-wrap:balance}
.vid-hero .sub{margin-top:16px;font-size:clamp(15px,1.5vw,19px);color:var(--text-dim);max-width:46ch;line-height:1.65}
.vid-hero .row{display:flex;align-items:center;gap:14px;margin-bottom:18px;flex-wrap:wrap}

/* home hero */
.home-hero{position:relative;min-height:100svh;display:flex;flex-direction:column;justify-content:center;
  padding:calc(var(--nav-h) + 40px) clamp(20px,5vw,48px) 64px;overflow:hidden}
.home-hero::before{content:"";position:absolute;inset:0;
  background:
   radial-gradient(60% 46% at 78% 18%,rgba(241,83,31,.14),transparent 70%),
   radial-gradient(46% 40% at 12% 86%,rgba(245,179,1,.08),transparent 70%)}
.home-hero .wrap{position:relative;width:100%}
.home-hero .mark{height:clamp(52px,7vw,84px);width:auto;margin-bottom:28px}
.home-hero h1{font-size:clamp(36px,6.4vw,76px);font-weight:800;line-height:1.06;letter-spacing:-.04em;max-width:16ch;text-wrap:balance}
.home-hero h1 .em{color:var(--accent)}
.home-hero .sub{margin-top:20px;font-size:clamp(15px,1.5vw,19px);color:var(--text-dim);max-width:50ch;line-height:1.7}

.prod-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:52px}
@media (max-width:760px){.prod-grid{grid-template-columns:1fr}}
.prod-card{position:relative;overflow:hidden;border-radius:22px;border:1px solid var(--hairline);
  min-height:320px;display:flex;flex-direction:column;justify-content:flex-end;padding:28px;
  text-decoration:none;color:var(--text);background:var(--ink-2);
  transition:transform .35s var(--ease),border-color .35s}
.prod-card:hover{transform:translateY(-5px);border-color:rgba(241,83,31,.55)}
.prod-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.62;filter:saturate(.92);
  transition:transform .6s var(--ease)}
.prod-card:hover img{transform:scale(1.04)}
.prod-card::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(15,12,10,.93),rgba(15,12,10,.22))}
.prod-card>*{position:relative;z-index:1}
.prod-card .k{font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:700;color:var(--accent);margin-bottom:8px}
.prod-card h2{font-size:clamp(24px,3vw,34px);font-weight:800;letter-spacing:-.02em}
.prod-card p{margin-top:8px;color:var(--text-dim);font-size:14.5px;line-height:1.55;max-width:36ch}
.prod-card .go{margin-top:16px;display:inline-flex;align-items:center;gap:8px;font-weight:700}
.prod-card .go .arrow{font-family:var(--font-mono);color:var(--accent)}

/* footer */
.footer{padding:clamp(72px,10vw,120px) clamp(20px,5vw,48px) 48px;background:var(--ink-2);border-top:1px solid var(--hairline)}
.footer .wrap{display:flex;flex-direction:column;gap:40px}
.footer .big{font-size:clamp(30px,4.6vw,54px);font-weight:800;letter-spacing:-.03em;line-height:1.12;max-width:20ch;text-wrap:balance}
.footer .big .em{color:var(--accent)}
.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 26px;border-radius:999px;
  background:var(--accent);color:#fff;font-weight:800;font-size:15px;text-decoration:none;
  box-shadow:0 14px 36px var(--accent-glow);transition:transform .2s var(--ease);white-space:nowrap;width:fit-content}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0) scale(.98)}
.btn .arrow{font-family:var(--font-mono)}
.footer .base{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--hairline);padding-top:26px;color:var(--text-dim);font-size:13px}
.footer .base .brand{display:inline-flex;align-items:center;gap:9px;font-weight:800;color:var(--text)}
.footer .base .brand img{height:20px}

/* CTA inside scenes */
.cta-pill{position:absolute;left:50%;bottom:13%;transform:translateX(-50%);
  display:inline-flex;align-items:center;gap:12px;padding:15px 26px;border-radius:999px;
  background:var(--accent);color:#fff;font-weight:800;font-size:15px;letter-spacing:-.01em;
  box-shadow:0 16px 40px var(--accent-glow);opacity:0;visibility:hidden;white-space:nowrap;
  text-decoration:none;will-change:opacity,transform}
.cta-pill .arrow{font-family:var(--font-mono)}

/* ── 기업 성과 (achievements) ── */
.proof-figure{position:relative;border-radius:22px;overflow:hidden;border:1px solid var(--hairline);
  margin-top:8px;background:var(--ink-2)}
.proof-figure img{width:100%;height:clamp(260px,42vw,520px);object-fit:cover;object-position:center 32%;display:block}
.proof-figure figcaption{position:absolute;left:0;right:0;bottom:0;padding:44px 30px 24px;
  background:linear-gradient(to top,rgba(15,12,10,.94),rgba(15,12,10,.55) 55%,transparent);
  display:flex;flex-direction:column;gap:6px}
.proof-figure .cap-k{font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:800;color:var(--accent-bright)}
.proof-figure .cap-t{font-size:clamp(18px,2.3vw,26px);font-weight:800;letter-spacing:-.02em;text-wrap:balance}
.proof-figure .cap-s{font-size:13.5px;color:var(--text-dim)}
.proof-figure .stamp{position:absolute;top:16px;right:18px;font-size:11px;letter-spacing:.1em;font-weight:700;
  color:var(--text-dim);background:rgba(15,12,10,.6);border:1px solid var(--hairline);
  padding:6px 12px;border-radius:999px;backdrop-filter:blur(6px)}

.ach-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:44px}
@media (max-width:760px){.ach-grid{grid-template-columns:1fr}}
.ach{display:grid;grid-template-columns:46px 1fr;gap:16px;align-items:start;
  border:1px solid var(--hairline);border-radius:16px;padding:22px 24px;background:var(--ink)}
.ach .ic{width:46px;height:46px;border-radius:12px;background:rgba(241,83,31,.14);flex:none;
  display:flex;align-items:center;justify-content:center;color:var(--accent-bright);
  font-family:var(--font-mono);font-size:15px;font-weight:700}
.ach .tt{font-weight:800;font-size:16.5px;letter-spacing:-.01em;margin-bottom:5px;line-height:1.35}
.ach .dd{color:var(--text-dim);font-size:14px;line-height:1.6}

/* ── 대표 소개 (CEO) ── */
.ceo{display:grid;grid-template-columns:340px 1fr;gap:clamp(28px,5vw,64px);align-items:center}
@media (max-width:820px){.ceo{grid-template-columns:1fr;gap:32px}}
.ceo-photo{position:relative;border-radius:22px;overflow:hidden;border:1px solid var(--hairline);
  background:var(--ink-2);max-width:340px}
.ceo-photo img{width:100%;display:block;aspect-ratio:4/5;object-fit:cover}
.ceo-photo::after{content:"";position:absolute;inset:0;box-shadow:inset 0 -60px 60px -30px rgba(15,12,10,.5)}
.ceo-body .role{font-size:12px;letter-spacing:.16em;text-transform:uppercase;font-weight:800;color:var(--accent);margin-bottom:12px}
.ceo-body .name{font-size:clamp(30px,4.2vw,46px);font-weight:800;letter-spacing:-.03em;line-height:1.05}
.ceo-body .name span{color:var(--text-dim);font-size:.5em;font-weight:700;margin-left:12px;letter-spacing:-.01em}
.ceo-body .lead{margin-top:14px;font-size:15.5px;line-height:1.7;color:var(--text-dim);max-width:52ch}
.ceo-bio{margin-top:26px;display:grid;grid-template-columns:1fr 1fr;gap:12px 26px}
@media (max-width:560px){.ceo-bio{grid-template-columns:1fr}}
.ceo-bio li{list-style:none;display:flex;gap:11px;align-items:flex-start;font-size:14.5px;line-height:1.5;color:var(--text)}
.ceo-bio li::before{content:"";flex:none;width:7px;height:7px;margin-top:7px;border-radius:2px;
  background:var(--accent);box-shadow:0 0 8px var(--accent-glow)}
.ceo-bio .award{color:var(--text-dim);font-size:12.5px;display:block;margin-top:1px}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease);transition-delay:var(--d,0s)}
.reveal.in{opacity:1;transform:none}

/* mobile overlay cards */
@media (max-width:768px){
  .overlay-card{width:calc(100% - 36px);left:18px!important;right:auto!important;top:auto!important;bottom:78px;padding:20px 22px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
}