/* ===== MIRSDI — minimal editorial white ===== */
:root{
  --bg:#ffffff;
  --paper:#f7f4ef;
  --ink:#16130f;
  --ink-soft:#3f3a34;
  --muted:#8a837a;
  --line:#e6e1d9;
  --line-strong:#d4cdc2;
  --accent:#f07d00;       /* MiRSDi 브랜드 오렌지 */
  --accent-deep:#d2660a;
  --brand-red:#d41217;    /* MiRSDi 브랜드 레드 */
  --dark:#17140f;
  --dark-2:#211c16;
  --maxw:1240px;
  --pad:clamp(20px,5vw,64px);
  --mono:"IBM Plex Mono",ui-monospace,monospace;
  --sans:"Pretendard","Pretendard Variable",-apple-system,BlinkMacSystemFont,system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{
  font-family:var(--sans);
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  letter-spacing:-.01em;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
em{font-style:normal;color:var(--accent)}

.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}

/* ---- shared bits ---- */
.eyebrow{
  font-family:var(--mono);
  font-size:.72rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--accent-deep);
  margin-bottom:1.4rem;
  display:flex;align-items:center;gap:.6em;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--accent)}
.eyebrow--light{color:#f3ad5e}

.sec-head{max-width:760px;margin-bottom:clamp(40px,6vw,72px)}
.sec-title{
  font-size:clamp(1.9rem,4.6vw,3.3rem);
  font-weight:800;
  line-height:1.18;
  letter-spacing:-.035em;
}
.sec-title--light{color:#fff}
.sec-sub{margin-top:1.2rem;color:var(--muted);font-size:1.05rem;max-width:62ch}

.btn{
  display:inline-flex;align-items:center;gap:.5em;
  font-size:.95rem;font-weight:600;
  padding:.95em 1.6em;border-radius:999px;
  transition:transform .25s ease, background .25s ease, color .25s ease, border-color .25s;
  border:1px solid transparent;will-change:transform;
}
.btn--solid{background:var(--ink);color:#fff}
.btn--solid:hover{background:var(--accent);transform:translateY(-2px)}
.btn--ghost{border-color:var(--line-strong);color:var(--ink)}
.btn--ghost:hover{border-color:var(--ink);transform:translateY(-2px)}

.section{padding:clamp(72px,11vw,140px) 0}
.section--paper{background:var(--paper)}

/* ===== NAV ===== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  transition:background .3s ease, box-shadow .3s ease, padding .3s ease;
  padding:18px 0;
}
.nav.scrolled{background:rgba(255,255,255,.88);backdrop-filter:blur(12px);box-shadow:0 1px 0 var(--line);padding:11px 0}
.nav__inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:.7rem}
.brand__logo{height:30px;width:auto;display:block;transition:height .3s ease}
.nav.scrolled .brand__logo{height:26px}
.brand__mark{font-weight:800;font-size:1.35rem;letter-spacing:-.04em;color:var(--ink)}
.brand__accent{color:var(--accent)}
.brand__ko{font-size:.82rem;color:var(--muted);letter-spacing:0}
.foot__logo{height:30px;width:auto;display:block}
.nav__links{display:flex;align-items:center;gap:clamp(14px,2vw,30px)}
.nav__links a{font-size:.92rem;font-weight:500;color:var(--ink-soft);transition:color .2s}
.nav__links a:hover{color:var(--accent-deep)}
.nav__cta{
  border:1px solid var(--line-strong);border-radius:999px;
  padding:.5em 1.1em;color:var(--ink)!important;font-weight:600!important;
}
.nav__cta:hover{background:var(--ink);color:#fff!important;border-color:var(--ink)}
.nav__burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav__burger span{width:24px;height:2px;background:var(--ink);transition:.3s}

/* ===== CINEMATIC HERO ===== */
.cinema{position:relative;height:520vh;background:#0b0b0f}
.cinema__stage{position:sticky;top:0;height:100vh;overflow:hidden;display:grid;place-items:center}
.cinema__scene{position:absolute;inset:0}
.cinema__scene svg,.cinema__scene canvas{width:100%;height:100%;display:block}
.cn-draw{stroke-dasharray:1;stroke-dashoffset:1}
#cn-structure{opacity:0}
.cinema__overlay{position:relative;z-index:3;text-align:center;padding:0 24px;pointer-events:none;width:100%;max-width:920px;margin-top:-6vh}
.cinema__kicker{font-family:var(--mono);font-size:.74rem;letter-spacing:.32em;color:var(--accent-deep);text-transform:uppercase}
.cinema__reveal{opacity:0;transform:translateY(26px);will-change:opacity,transform;padding:54px clamp(24px,4vw,56px);border-radius:10px;background:radial-gradient(ellipse 82% 80% at 50% 50%,rgba(251,250,248,.95) 34%,rgba(251,250,248,.7) 56%,rgba(251,250,248,0) 74%)}
.cinema__title{font-size:clamp(2.4rem,6.4vw,5.2rem);font-weight:800;line-height:1.08;letter-spacing:-.045em;margin:1.4rem 0 0}
.cinema__sub{margin:1.3rem auto 0;max-width:48ch;color:var(--ink-soft);font-size:clamp(1rem,1.4vw,1.16rem)}
.cinema__cta{display:flex;gap:14px;justify-content:center;margin-top:2.2rem;flex-wrap:wrap;pointer-events:auto}
.cinema__phase{position:absolute;left:clamp(20px,5vw,64px);bottom:46px;z-index:3;font-family:var(--mono);font-size:.78rem;letter-spacing:.14em;color:var(--ink-soft);text-transform:uppercase;display:flex;align-items:center;gap:.8em}
.cinema__phase::before{content:"";width:34px;height:1px;background:var(--accent)}
.cinema__hint{position:absolute;left:50%;transform:translateX(-50%);bottom:38px;z-index:3;display:flex;flex-direction:column;align-items:center;gap:10px;font-family:var(--mono);font-size:.66rem;letter-spacing:.3em;color:var(--muted)}
.cinema__hint i{width:1px;height:34px;background:linear-gradient(var(--accent),transparent);animation:hintpulse 1.8s ease-in-out infinite}
@keyframes hintpulse{0%,100%{transform:scaleY(.4);opacity:.4;transform-origin:top}50%{transform:scaleY(1);opacity:1;transform-origin:top}}
.cinema__bar{position:absolute;left:0;right:0;bottom:0;height:3px;background:rgba(0,0,0,.06);z-index:4}
.cinema__bar span{display:block;height:100%;width:0;background:var(--accent)}
/* 3D 로딩 오버레이 */
.c3d-load{position:absolute;inset:0;z-index:6;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:22px;background:#efe9e1;transition:opacity .7s ease}
.c3d-load.done{opacity:0;pointer-events:none}
.c3d-load__mark{font-weight:800;font-size:2rem;letter-spacing:-.04em;color:var(--brand-red)}
.c3d-load__mark span{color:var(--accent)}
.c3d-load__track{width:min(280px,60vw);height:3px;background:rgba(0,0,0,.1);border-radius:2px;overflow:hidden}
.c3d-load__track span{display:block;height:100%;width:0;background:var(--accent);transition:width .3s ease}
.c3d-load p{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;color:var(--muted);text-transform:uppercase}
.c3d-load p span{margin-left:.6em;color:var(--accent-deep)}
/* ===== 스크롤-스크럽 히어로 ===== */
.scrub__scrim{position:absolute;inset:0;z-index:2;pointer-events:none;
  background:linear-gradient(180deg,rgba(8,8,12,.62) 0%,rgba(8,8,12,.12) 26%,rgba(8,8,12,.10) 58%,rgba(8,8,12,.70) 100%)}
.cinema__overlay--top{position:absolute;inset:0;z-index:3;text-align:center;pointer-events:none;margin:0}
.cinema__overlay--top .cinema__kicker{position:absolute;top:clamp(86px,15vh,150px);left:0;right:0;justify-content:center;color:#ffb877}
.scrub__intro,.scrub__outro{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:min(92vw,920px);background:none;padding:0;will-change:opacity,transform}
.scrub__intro .cinema__title,.scrub__outro .cinema__title{color:#fff;text-shadow:0 2px 30px rgba(0,0,0,.5)}
.scrub__intro .cinema__sub{color:rgba(255,255,255,.88);text-shadow:0 1px 16px rgba(0,0,0,.5)}
.scrub__outro .cinema__cta{pointer-events:auto}
.scrub__cap{position:absolute;left:0;right:0;bottom:clamp(64px,11vh,118px);z-index:3;text-align:center;
  font-family:var(--mono);letter-spacing:.16em;color:#fff;font-size:clamp(.85rem,1.5vw,1.1rem);
  text-shadow:0 1px 18px rgba(0,0,0,.6);opacity:0;pointer-events:none}
#scrub .cinema__hint{color:rgba(255,255,255,.72)}
#scrub .cinema__bar{background:rgba(255,255,255,.14)}

/* ===== HERO ===== */
.hero{position:relative;padding-top:clamp(130px,17vw,190px);padding-bottom:0;overflow:hidden}
.hero__inner{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(30px,5vw,70px);align-items:center}
.hero__title{
  font-size:clamp(2.5rem,6.6vw,5rem);
  font-weight:800;line-height:1.06;letter-spacing:-.045em;
  margin:.3em 0 .7em;
}
.hero__title span{display:block}
.hero__lead{font-size:clamp(1rem,1.4vw,1.18rem);color:var(--ink-soft);max-width:46ch}
.hero__lead strong{color:var(--ink);font-weight:700}
.hero__cta{display:flex;gap:14px;margin-top:2.2rem;flex-wrap:wrap}
.hero__media{position:relative;aspect-ratio:4/5;border-radius:4px;overflow:hidden;background:var(--paper)}
.hero__media img{width:100%;height:100%;object-fit:cover;transition:transform 1.2s ease}
.hero__media:hover img{transform:scale(1.04)}
.hero__caption{
  position:absolute;left:0;bottom:0;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;
  color:#fff;background:rgba(20,17,13,.62);backdrop-filter:blur(4px);
  padding:.7em 1em;
}
.hero__ticker{margin-top:clamp(50px,7vw,84px);border-top:1px solid var(--line);border-bottom:1px solid var(--line);overflow:hidden;padding:18px 0}
.ticker__row{display:flex;gap:0;white-space:nowrap;width:max-content;animation:ticker 32s linear infinite}
.ticker__row span{font-family:var(--mono);font-size:.85rem;letter-spacing:.05em;color:var(--ink-soft);padding:0 1.1em}
.ticker__row i{color:var(--accent);font-style:normal}
@keyframes ticker{to{transform:translateX(-50%)}}

/* ===== CAPS (4 강점) ===== */
.caps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}
.cap{padding:38px 30px 38px 0;border-bottom:1px solid var(--line);position:relative}
.caps .cap+.cap{padding-left:30px;border-left:1px solid var(--line)}
.cap__no{font-family:var(--mono);font-size:.8rem;color:var(--accent);letter-spacing:.1em}
.cap h3{font-size:1.22rem;font-weight:700;margin:1.4rem 0 .8rem;letter-spacing:-.02em}
.cap p{font-size:.93rem;color:var(--muted);line-height:1.65}
.cap::after{content:"";position:absolute;left:0;bottom:-1px;width:0;height:2px;background:var(--accent);transition:width .4s ease}
.cap:hover::after{width:100%}

/* ===== SOLUTION (dark) ===== */
.solution{background:var(--dark);color:#cfc8bd;padding:clamp(80px,12vw,150px) 0;position:relative;overflow:hidden}
.solution::before{content:"";position:absolute;top:-30%;right:-10%;width:55vw;height:55vw;
  background:radial-gradient(circle,rgba(240,130,0,.14),transparent 62%);pointer-events:none}
.solution__inner{display:grid;grid-template-columns:1fr 1fr;gap:clamp(36px,5vw,80px);align-items:center;position:relative}
.solution__lead{font-size:1.06rem;line-height:1.8;color:#b7b0a6;margin-top:1.4rem;max-width:52ch}
.solution__lead strong{color:#fff;font-weight:700}
.solution__list{list-style:none;margin-top:2.4rem;display:grid;gap:0}
.solution__list li{
  display:flex;align-items:center;gap:1.1em;
  padding:1.05em 0;border-top:1px solid rgba(255,255,255,.1);
  font-size:1.05rem;color:#efe9e0;font-weight:500;
}
.solution__list li:last-child{border-bottom:1px solid rgba(255,255,255,.1)}
.solution__list span{font-family:var(--mono);font-size:.8rem;color:var(--accent)}
.solution__media{aspect-ratio:5/4;border-radius:4px;overflow:hidden}
.solution__media img{width:100%;height:100%;object-fit:cover}

/* ===== PRODUCT ===== */
.product{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(30px,4vw,60px);align-items:center}
.product__hero{border:1px solid var(--line);border-radius:4px;overflow:hidden;background:#fff}
.product__hero img{width:100%;aspect-ratio:16/11;object-fit:contain;background:#fff;padding:8px}
.product__hero figcaption{font-family:var(--mono);font-size:.74rem;letter-spacing:.06em;color:var(--muted);padding:.9em 1.1em;border-top:1px solid var(--line)}
.product__list{list-style:none}
.product__list li{display:flex;align-items:baseline;justify-content:space-between;gap:1em;padding:1.05em 0;border-bottom:1px solid var(--line)}
.product__list li:first-child{border-top:1px solid var(--line)}
.product__list b{font-size:1.1rem;font-weight:700;letter-spacing:-.01em}
.product__list span{font-family:var(--mono);font-size:.78rem;color:var(--muted);letter-spacing:.02em;text-align:right}

/* ===== WORK GRID ===== */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.card{position:relative;overflow:hidden;border-radius:4px;aspect-ratio:3/4;background:var(--ink);display:block}
.card--wide{grid-column:span 2;aspect-ratio:auto}
.card img{width:100%;height:100%;object-fit:cover;transition:transform .7s ease, opacity .4s;opacity:.92}
.card:hover img{transform:scale(1.06);opacity:.7}
.card__meta{position:absolute;inset:auto 0 0 0;padding:20px;color:#fff;
  background:linear-gradient(to top,rgba(15,12,9,.82),rgba(15,12,9,.05) 80%,transparent);
  display:flex;flex-direction:column;gap:.25rem}
.card__cat{font-family:var(--mono);font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.card__meta h3{font-size:1rem;font-weight:700;line-height:1.3;letter-spacing:-.01em}
.card--wide .card__meta h3{font-size:1.3rem}
.card__yr{font-family:var(--mono);font-size:.72rem;color:rgba(255,255,255,.7)}

/* ===== STATS ===== */
.stats{background:var(--ink);color:#fff;padding:clamp(56px,8vw,90px) 0}
.stats__inner{display:grid;grid-template-columns:repeat(4,1fr);gap:30px}
.stat{text-align:left;position:relative;padding-left:22px}
.stat::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:2px;background:var(--accent)}
.stat__num{font-size:clamp(2rem,3.6vw,3rem);font-weight:800;letter-spacing:-.04em;line-height:1;display:block}
.stat__num i{font-style:normal;color:var(--accent);font-size:.6em}
.stat span{display:block;margin-top:.7rem;color:rgba(255,255,255,.62);font-size:.9rem}

/* ===== CONTACT ===== */
.contact{padding:clamp(72px,11vw,140px) 0}
.contact__inner{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(36px,5vw,80px);align-items:center}
.contact__lead{color:var(--muted);font-size:1.05rem;margin-top:1.2rem;max-width:48ch}
.contact__cta{margin-top:2rem}
.info{display:grid;gap:0;border-top:1px solid var(--line)}
.info>div{display:grid;grid-template-columns:90px 1fr;gap:16px;padding:1.15em 0;border-bottom:1px solid var(--line)}
.info dt{font-family:var(--mono);font-size:.76rem;letter-spacing:.06em;color:var(--accent-deep);text-transform:uppercase;padding-top:.2em}
.info dd{font-size:1.02rem;font-weight:500}
.info dd span{color:var(--muted);font-weight:400;font-size:.9rem}

/* ===== FOOTER ===== */
.foot{background:var(--dark-2);color:#a59e93;padding:clamp(46px,6vw,72px) 0}
.foot__inner{display:flex;flex-wrap:wrap;gap:28px;align-items:center;justify-content:space-between}
.foot__brand .brand__mark{color:#fff;font-size:1.3rem}
.foot__brand p{font-family:var(--mono);font-size:.66rem;letter-spacing:.18em;color:var(--accent);margin-top:.4rem}
.foot__nav{display:flex;gap:22px;flex-wrap:wrap}
.foot__nav a{font-size:.9rem;transition:color .2s}
.foot__nav a:hover{color:#fff}
.foot__copy{flex-basis:100%;font-size:.78rem;color:#6f685f;border-top:1px solid rgba(255,255,255,.08);padding-top:24px;margin-top:6px;line-height:1.7}

/* ===== reveal motion ===== */
.reveal{opacity:0;transform:translateY(22px);animation:rise .9s cubic-bezier(.2,.7,.2,1) forwards;animation-delay:var(--d,0s)}
.in-view{opacity:0;transform:translateY(28px);transition:opacity .8s ease, transform .8s cubic-bezier(.2,.7,.2,1)}
.in-view.shown{opacity:1;transform:none}
@keyframes rise{to{opacity:1;transform:none}}

/* ===== RESPONSIVE ===== */
@media (max-width:980px){
  .hero__inner{grid-template-columns:1fr;gap:36px}
  .hero__media{aspect-ratio:16/10;max-height:46vh}
  .caps{grid-template-columns:repeat(2,1fr)}
  .caps .cap+.cap{padding-left:0;border-left:0}
  .cap{padding:30px 0}
  .caps .cap:nth-child(even){padding-left:24px;border-left:1px solid var(--line)}
  .solution__inner,.product,.contact__inner{grid-template-columns:1fr}
  .product__hero{order:-1}
  .grid{grid-template-columns:repeat(2,1fr)}
  .card--wide{grid-column:span 2}
  .stats__inner{grid-template-columns:repeat(2,1fr);gap:34px 24px}
}
/* 태블릿~모바일: 햄버거 드로어 (861px 미만 = 흰 가로 nav 분기와 정확히 맞물림) */
@media (max-width:860px){
  .nav__links{
    position:fixed;inset:0 0 0 auto;width:min(78vw,320px);
    flex-direction:column;align-items:flex-start;justify-content:center;gap:26px;
    background:#fff;padding:40px;transform:translateX(100%);transition:transform .35s ease;
    box-shadow:-20px 0 60px rgba(0,0,0,.12);
  }
  .nav__links.open{transform:none}
  .nav__links a{font-size:1.15rem;color:var(--ink-soft)}
  .nav__burger{display:flex;z-index:60}
}
@media (max-width:620px){
  .brand__ko{display:none}
  .grid{grid-template-columns:1fr}
  .card,.card--wide{grid-column:span 1;aspect-ratio:4/3}
  .stats__inner{grid-template-columns:1fr}
  .info>div{grid-template-columns:74px 1fr}
}

@media (prefers-reduced-motion:reduce){
  .reveal,.in-view{animation:none!important;transition:none!important;opacity:1!important;transform:none!important}
  .ticker__row{animation:none}
}

/* ===== 시네마틱 히어로 오버레이 (그레인·레터박스·비네팅) ===== */
.cine-vignette{position:absolute;inset:0;z-index:2;pointer-events:none;
  background:radial-gradient(ellipse 120% 100% at 50% 44%,transparent 52%,rgba(0,0,0,.30) 78%,rgba(0,0,0,.62) 100%)}
.cine-grain{position:absolute;inset:-60%;z-index:3;pointer-events:none;opacity:.09;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size:160px 160px;animation:grainshift .6s steps(3) infinite;will-change:transform}
@keyframes grainshift{0%{transform:translate(0,0)}33%{transform:translate(-3%,2%)}66%{transform:translate(2%,-3%)}100%{transform:translate(0,0)}}
.cine-bar{position:absolute;left:0;right:0;z-index:4;pointer-events:none;height:6.5vh;background:#06060a}
.cine-bar--top{top:0;box-shadow:0 6px 18px rgba(0,0,0,.4)}
.cine-bar--bottom{bottom:0;box-shadow:0 -6px 18px rgba(0,0,0,.4)}
#scrub .cinema__hint{z-index:6}
#scrub .cinema__bar{z-index:6}
@media(max-width:760px){.cine-bar{height:4.5vh}}
@media(prefers-reduced-motion:reduce){.cine-grain{animation:none}}

/* ===== 비트 인디케이터 + 진행바 그라디언트 ===== */
.scrub-beats{position:absolute;left:clamp(20px,5vw,64px);bottom:44px;z-index:6;display:flex;align-items:center;gap:14px;pointer-events:none}
.scrub-beats__num{font-family:var(--mono);font-size:.74rem;letter-spacing:.18em;color:rgba(255,255,255,.55)}
.scrub-beats__num b{color:#fff;font-weight:600;font-style:normal}
.scrub-beats i{width:7px;height:7px;border-radius:50%;background:rgba(255,255,255,.26);transition:background .4s ease,transform .4s ease}
.scrub-beats i.on{background:var(--accent);transform:scale(1.5)}
#scrub .cinema__bar span{background:linear-gradient(90deg,var(--accent),var(--brand-red))}
@media(max-width:760px){.scrub-beats{left:18px;bottom:34px;gap:10px}.scrub-beats__num{font-size:.66rem}}