:root{color-scheme:dark;--bg:#0c0c0d;--card:#141416;--ink:#ececec;--sub:#a6a6ab;--mute:#76767c;--line:#2a2a2d;--line2:#3a3a3e}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:Pretendard,system-ui,sans-serif;-webkit-text-size-adjust:100%}
a{color:inherit}

/* ---------- 시연 영상 페이지 ---------- */
main.vid{max-width:520px;margin:0 auto;padding:14px 16px 40px;display:flex;flex-direction:column;gap:10px}
.back{align-self:flex-start;color:var(--sub);text-decoration:none;font-size:13px;padding:4px 0}
.back:hover{color:var(--ink)}
.stage{position:relative;width:100%;max-height:78svh;background:#000;border-radius:14px;overflow:hidden;margin:0 auto}
.stage video{width:100%;height:100%;display:block;object-fit:contain;background:#000}
.kicker{margin:8px 0 0;color:var(--mute);font-size:13px;letter-spacing:.04em}
main.vid h1{font-size:21px;margin:0;font-weight:700;letter-spacing:-.01em}
.sub{margin:0;color:var(--sub);font-size:15px}
.note{margin:0;color:var(--sub);font-size:13px}
.links{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.site{display:inline-block;padding:9px 14px;border:1px solid var(--line);border-radius:10px;color:var(--ink);text-decoration:none;font-size:14px}
.site:hover{border-color:var(--sub)}
.org{color:var(--mute);font-size:12px;margin-top:14px}
#unmute{position:absolute;left:50%;top:14px;transform:translateX(-50%);padding:10px 16px;border-radius:999px;border:0;background:rgba(255,255,255,.92);color:#111;font:600 15px Pretendard,system-ui,sans-serif;cursor:pointer}
#unmute[hidden]{display:none}
.load{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);margin:0;padding:8px 14px;border-radius:999px;background:rgba(0,0,0,.6);color:#fff;font-size:14px;pointer-events:none;white-space:nowrap}
.load[hidden]{display:none}

/* ---------- 첫 페이지: 연구실 AX 풀스택 ---------- */
.home main{max-width:1120px;margin:0 auto;padding:0 20px 56px}
.hero{padding:72px 0 36px;border-bottom:1px solid var(--line)}
.eyebrow{margin:0 0 18px;color:var(--sub);font-size:14px;letter-spacing:.06em}
.hero h1{margin:0;font-size:clamp(44px,8vw,84px);line-height:1.02;font-weight:800;letter-spacing:-.035em}
.hero .h2{margin:14px 0 0;font-size:clamp(20px,3.2vw,30px);font-weight:600;color:#d8d8dc;letter-spacing:-.02em}
.lead{margin:22px 0 0;max-width:720px;color:var(--sub);font-size:17px;line-height:1.65;word-break:keep-all}
.flow{display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px;margin-top:34px}
.step{display:inline-flex;align-items:baseline;gap:8px;padding:10px 16px;border:1px solid var(--line2);border-radius:999px;text-decoration:none;font-size:15px;font-weight:600;color:var(--ink);background:var(--card)}
.step b{font-size:12px;color:var(--mute);font-weight:700;font-variant-numeric:tabular-nums}
.step:hover{border-color:var(--sub)}
.arr{color:var(--mute);font-size:15px}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:32px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px 24px 20px;display:flex;flex-direction:column;gap:12px;scroll-margin-top:16px}
.card:first-child{grid-column:1/-1}
.no{display:flex;align-items:baseline;gap:10px}
.no b{font-size:30px;font-weight:800;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.no span{color:var(--sub);font-size:14px;font-weight:600;border:1px solid var(--line2);border-radius:999px;padding:2px 10px}
.card h3{margin:0;font-size:22px;font-weight:700;letter-spacing:-.02em;word-break:keep-all}
.card:first-child h3{font-size:clamp(22px,3vw,30px)}
.desc{margin:0;color:var(--sub);font-size:15px;line-height:1.6;word-break:keep-all}
.metric{display:flex;flex-direction:column;gap:2px;padding-top:12px;border-top:1px dashed var(--line2);margin-top:auto}
.metric strong{font-size:26px;font-weight:800;letter-spacing:-.02em}
.metric span{color:var(--mute);font-size:13px}
.btns{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.btn{display:inline-block;padding:9px 14px;border:1px solid var(--line2);border-radius:10px;text-decoration:none;font-size:14px;color:var(--ink)}
.btn.pri{background:var(--ink);color:#111;border-color:var(--ink);font-weight:700}
.btn:hover{border-color:var(--sub)}
.btn.pri:hover{background:#fff}
.foot{margin-top:28px;color:var(--mute);font-size:13px}
@media (max-width:720px){
  .hero{padding:44px 0 28px}
  .grid{grid-template-columns:1fr}
  .card{padding:20px 18px 18px}
  .lead{font-size:15.5px}
  .arr{display:none}
}
.thumb{position:relative;display:block;margin:-24px -24px 4px;aspect-ratio:16/9;overflow:hidden;border-radius:18px 18px 0 0;background:#000;border-bottom:1px solid var(--line)}
.thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s}
.thumb:hover img{transform:scale(1.03)}
.card:first-child .thumb{aspect-ratio:21/9}
.play{position:absolute;right:14px;bottom:12px;width:44px;height:44px;border-radius:50%;background:rgba(12,12,13,.72);color:#fff;display:grid;place-items:center;font-size:16px;border:1px solid rgba(255,255,255,.35)}
@media (max-width:720px){.thumb{margin:-20px -18px 2px}.card:first-child .thumb{aspect-ratio:16/9}}
@media (min-width:721px){.grid{grid-template-columns:repeat(6,minmax(0,1fr))}.card{grid-column:span 2}.card:first-child{grid-column:1/-1}.card:nth-child(5),.card:nth-child(6),.card:nth-child(7){grid-column:span 2}}