:root{
  --bg:#0b0a09; --ink:#efe9df; --ink2:#a8a097; --mute:#6d665f;
  --line:rgba(239,233,223,.72); --faint:rgba(239,233,223,.07);
  --amber:#f2b544; --rust:#b0622c;
}
*{box-sizing:border-box;margin:0;padding:0}
html{background:var(--bg);-webkit-text-size-adjust:100%}
body{color:var(--ink);font-family:"Pretendard Variable",Pretendard,-apple-system,system-ui,sans-serif;-webkit-font-smoothing:antialiased;letter-spacing:-.01em}
a{color:inherit;text-decoration:none}
.mono{font-family:"JetBrains Mono",ui-monospace,monospace;letter-spacing:.08em}

/* 머리 */
.top{position:fixed;inset:0 0 auto 0;z-index:20;display:flex;justify-content:space-between;align-items:center;padding:18px clamp(18px,4vw,44px);mix-blend-mode:difference}
.mark{font:500 12px/1 "JetBrains Mono",monospace;letter-spacing:.18em}
.steps{display:flex;gap:18px;list-style:none;opacity:0;transition:opacity .4s}
.steps.on{opacity:1}
.steps li{display:flex;gap:6px;align-items:baseline;font-size:12px;color:var(--mute);transition:color .3s}
.steps li b{font:500 10px/1 "JetBrains Mono",monospace}
.steps li.on{color:var(--ink)}

/* 첫 화면 */
.hero{min-height:100svh;display:flex;flex-direction:column;justify-content:center;padding:0 clamp(22px,8vw,120px);position:relative}
.eyebrow{font-size:11px;color:var(--ink2);margin-bottom:28px}
.hero h1{font-weight:760;font-size:clamp(44px,9.5vw,132px);line-height:1.02;letter-spacing:-.045em}
.lede{margin-top:28px;font-size:clamp(15px,1.6vw,19px);line-height:1.65;color:var(--ink2)}
.cue{position:absolute;bottom:28px;left:50%;transform:translateX(-50%);font-size:10px;color:var(--mute);animation:bob 2.4s ease-in-out infinite}
@keyframes bob{50%{transform:translate(-50%,6px)}}
.hero>*{opacity:0;transform:translateY(14px);animation:rise .9s cubic-bezier(.2,.7,.2,1) forwards}
.hero .eyebrow{animation-delay:.1s}.hero h1{animation-delay:.25s}.hero .lede{animation-delay:.5s}.hero .cue{animation:rise .9s .9s forwards,bob 2.4s 1.8s ease-in-out infinite}
@keyframes rise{to{opacity:1;transform:none}}

/* 무대 */
.stage{height:760vh;position:relative}
.sticky{position:sticky;top:0;height:100svh;display:grid;grid-template-columns:minmax(0,520px) auto;justify-content:center;align-items:center;gap:clamp(24px,6vw,96px);padding:64px clamp(22px,8vw,120px) 32px;overflow:hidden}
.captions{position:relative;height:260px}
.cap{position:absolute;inset:0;opacity:0;transform:translateY(18px);transition:opacity .5s,transform .6s cubic-bezier(.2,.7,.2,1);pointer-events:none}
.cap.on{opacity:1;transform:none}
.cap .num{font-size:11px;color:var(--amber);margin-bottom:18px}
.cap h2{font-weight:720;font-size:clamp(30px,4.2vw,58px);line-height:1.1;letter-spacing:-.035em}
.cap p:last-child{margin-top:18px;max-width:30em;font-size:clamp(15px,1.3vw,17px);line-height:1.7;color:var(--ink2)}

.frame{position:relative;height:min(84svh,1040px);aspect-ratio:675/1200;border-radius:6px;overflow:hidden;background:#0e0d0c;box-shadow:0 0 0 1px rgba(239,233,223,.08)}
.grid{position:absolute;inset:0;background-image:linear-gradient(var(--faint) 1px,transparent 1px),linear-gradient(90deg,var(--faint) 1px,transparent 1px);background-size:4.5% 2.53%;opacity:var(--grid,1)}
.photo{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0}
.entrance{clip-path:inset(var(--wipe,100%) 0 0 0);opacity:1;filter:brightness(var(--bright,.35))}
.interior{transform:scale(var(--zoom,1.18));transform-origin:62% 55%;opacity:var(--in,0)}

.plan{position:absolute;inset:0;width:100%;height:100%;opacity:var(--plan,1)}
.plan .d,.ribs line{fill:none;stroke:var(--line);stroke-width:1.4;vector-effect:non-scaling-stroke;stroke-dasharray:1;stroke-dashoffset:1}
.ribs line{stroke:rgba(239,233,223,.28)}
.notes{font-family:"JetBrains Mono",monospace;font-size:15px;letter-spacing:.04em}
.note{opacity:0;transition:opacity .45s}
.note.on{opacity:1}
.note line,.note circle{fill:none;stroke:var(--amber);stroke-width:1.2;vector-effect:non-scaling-stroke;stroke-dasharray:5 4}
.note text{fill:var(--amber)}
.note .big{font-family:"Pretendard Variable",sans-serif;font-weight:700;font-size:44px;letter-spacing:-.02em}

.signlogo{position:absolute;left:33%;top:18.6%;width:51%;transform:rotate(-6deg) scale(var(--sls,1.6));transform-origin:50% 50%;opacity:var(--slo,0);filter:drop-shadow(0 0 var(--glow,0px) rgba(242,181,68,.9))}

.logos{position:absolute;inset:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:repeat(2,minmax(0,1fr));background:rgba(11,10,9,var(--lbg,0));pointer-events:none}
.lg{position:relative;min-height:0;min-width:0;overflow:hidden;display:flex;align-items:center;justify-content:center;border:1px solid rgba(239,233,223,.08);opacity:0;transform:scale(.94);transition:opacity .5s,transform .7s cubic-bezier(.2,.7,.2,1)}
.lg.on{opacity:1;transform:none}
.lg img{width:72%;height:62%;min-height:0;object-fit:contain}
.lg span{position:absolute;left:10px;bottom:10px;font-size:9px;color:var(--mute)}
.lg::before,.lg::after{content:"";position:absolute;background:rgba(242,181,68,.25)}
.lg::before{left:50%;top:8%;bottom:8%;width:1px}
.lg::after{top:50%;left:8%;right:8%;height:1px}

.phone{position:absolute;left:50%;top:50%;width:62%;aspect-ratio:780/1688;transform:translate(-50%,calc(-50% + var(--py,120%)));border-radius:34px;padding:9px;background:#161412;box-shadow:0 0 0 1px rgba(239,233,223,.14),0 40px 80px rgba(0,0,0,.6)}
.screen{position:relative;width:100%;height:100%;border-radius:26px;overflow:hidden;background:#fff}
.screen img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:top;opacity:0;transition:opacity .5s}
.screen img.on{opacity:1}
.shade{position:absolute;inset:0;background:rgba(0,0,0,var(--shade,0));pointer-events:none;z-index:0}
.phone{z-index:2}

/* 끝 */
.outro{min-height:100svh;display:flex;flex-direction:column;justify-content:center;padding:96px clamp(22px,8vw,120px)}
.outro h2{font-weight:760;font-size:clamp(40px,8vw,108px);line-height:1.04;letter-spacing:-.045em}
.links{display:flex;flex-wrap:wrap;gap:10px;margin-top:40px}
.btn{display:inline-flex;align-items:center;height:52px;padding:0 24px;border-radius:999px;background:var(--ink);color:var(--bg);font-weight:650;font-size:15px}
.btn.ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1px rgba(239,233,223,.3)}
.works{list-style:none;margin-top:72px;border-top:1px solid rgba(239,233,223,.12);max-width:680px}
.works li{display:flex;justify-content:space-between;align-items:baseline;padding:18px 0;border-bottom:1px solid rgba(239,233,223,.12);font-size:18px;font-weight:600}
.works .mono{font-size:10px;color:var(--mute);font-weight:400}
.foot{margin-top:56px;font-size:10px;color:var(--mute)}

/* 폰 */
@media (max-width:820px){
  .steps li span{display:none}
  .steps{gap:10px}
  .sticky{grid-template-columns:1fr;grid-template-rows:auto 1fr;align-items:start;justify-items:center;gap:14px;padding:58px 20px 18px}
  .captions{height:150px;width:100%}
  .cap h2{font-size:28px}
  .cap .num{margin-bottom:10px}
  .cap p:last-child{margin-top:10px;font-size:14px;line-height:1.6}
  .frame{height:auto;width:min(100%,calc((100svh - 240px) * 675 / 1200))}
  .notes{font-size:22px}
  .note .big{font-size:56px}
}
@media (prefers-reduced-motion:reduce){
  .hero>*{animation:none;opacity:1;transform:none}
  .cap,.lg,.note,.screen img{transition:none}
}