/* naedam.ai — SAR public site. Fonts are served as files (no inline base64).
   Latin: Pangram Pangram subsets. Hangul: Pretendard 1.3.9 (OFL), only fetched when Hangul is on the page (unicode-range). */
@font-face{font-family:'SAR Display';src:url(/fonts/PPNeueMontreal-Bold.woff2) format('woff2');font-weight:700 900;font-display:swap}
@font-face{font-family:'SAR Text';src:url(/fonts/PPNeueMontreal-Book.woff2) format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:'SAR Text';src:url(/fonts/PPNeueMontreal-Medium.woff2) format('woff2');font-weight:500 600;font-display:swap}
@font-face{font-family:'SAR Text';src:url(/fonts/PPNeueMontreal-Bold.woff2) format('woff2');font-weight:700 900;font-display:swap}
@font-face{font-family:'SAR Serif';src:url(/fonts/PPEditorialNew-Regular.woff2) format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:'SAR Mono';src:url(/fonts/PPNeueMontrealMono-Light.woff2) format('woff2');font-weight:300;font-display:swap}
@font-face{font-family:'SAR Mono';src:url(/fonts/PPNeueMontrealMono-Book.woff2) format('woff2');font-weight:400 500;font-display:swap}
@font-face{font-family:'Pretendard';src:url(/fonts/pretendard/Pretendard-Regular.subset.woff2) format('woff2');font-weight:300 400;font-display:swap;
  unicode-range:U+1100-11FF,U+3000-303F,U+3130-318F,U+A960-A97F,U+AC00-D7AF,U+D7B0-D7FF,U+FF00-FFEF}
@font-face{font-family:'Pretendard';src:url(/fonts/pretendard/Pretendard-Medium.subset.woff2) format('woff2');font-weight:500 600;font-display:swap;
  unicode-range:U+1100-11FF,U+3000-303F,U+3130-318F,U+A960-A97F,U+AC00-D7AF,U+D7B0-D7FF,U+FF00-FFEF}
@font-face{font-family:'Pretendard';src:url(/fonts/pretendard/Pretendard-Bold.subset.woff2) format('woff2');font-weight:700 900;font-display:swap;
  unicode-range:U+1100-11FF,U+3000-303F,U+3130-318F,U+A960-A97F,U+AC00-D7AF,U+D7B0-D7FF,U+FF00-FFEF}

:root{
  --bg:#0e0e11; --bg2:#141418; --card:#18181d; --line:#26262d; --grid:#1a1a20;
  --fg:#f2f3f5; --fg2:#a9b0b9; --fg3:#7d8590;
  --primary:#ff5a1f; --ink:#0e0e11; --pill:#ffffff;
  --font-display:'SAR Display','Pretendard','Helvetica Neue',system-ui,sans-serif;
  --font-text:'SAR Text','Pretendard','Helvetica Neue',system-ui,sans-serif;
  --font-serif:'SAR Serif','Pretendard',Georgia,serif;
  --font-mono:'SAR Mono','Pretendard',ui-monospace,monospace;
  --r-card:16px;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font-text);font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden}
:lang(ko) body,body:lang(ko){word-break:keep-all;overflow-wrap:anywhere}
.wrap{max-width:1240px;margin:0 auto;padding-inline:clamp(16px,4vw,40px)}
a{color:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px}
.skip{position:absolute;left:16px;top:-60px;z-index:30;background:var(--pill);color:var(--ink);padding:10px 14px;border-radius:8px;text-decoration:none;font-size:14px}
.skip:focus{top:12px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--fg2)}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--primary)}
:lang(ko) .eyebrow{letter-spacing:.04em;font-size:12px}

/* pill buttons */
.pill{display:inline-flex;align-items:center;justify-content:center;gap:6px;border-radius:999px;font-weight:500;text-decoration:none;white-space:nowrap;transition:transform .12s,opacity .15s;border:0}
.pill:active{transform:scale(.97)}
.pill-white{background:var(--pill);color:var(--ink)}
.pill-white:hover{opacity:.9}
.pill-sm{height:40px;padding-inline:18px;font-size:14px}
.pill-lg{height:48px;padding-inline:22px;font-size:15px}

/* nav */
.nav{position:absolute;top:env(safe-area-inset-top,0px);left:0;right:0;z-index:5}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:76px;gap:16px}
.mark{font-family:var(--font-display);font-weight:800;font-size:24px;letter-spacing:-.01em;text-decoration:none;line-height:1}
.menu{display:flex;gap:6px;list-style:none;margin:0;padding:0}
.menu a{display:flex;align-items:center;padding:8px 12px;color:var(--fg);text-decoration:none;font-size:14px;opacity:.85}
.menu a:hover{opacity:1}
.nav-right{display:flex;align-items:center;gap:18px}
.nav-right .lang,.nav-right .lab{font-size:14px;text-decoration:none;opacity:.85}
.nav-right .lang:hover,.nav-right .lab:hover{opacity:1}
.lab{display:inline-flex;flex-direction:column;line-height:1.15}
.lab small{font-family:var(--font-mono);font-size:10px;letter-spacing:.06em;color:var(--fg3)}
.lang{font-family:var(--font-mono);letter-spacing:.06em}
@media (max-width:860px){.menu{display:none}}
@media (max-width:520px){.nav-right .lab{display:none}.nav-right{gap:14px}}

/* hero */
.hero{position:relative;display:flex;flex-direction:column;justify-content:flex-end;overflow:hidden;
  background:radial-gradient(120% 70% at 50% 110%,#3a1a0e 0%,#1b120f 35%,var(--bg) 70%)}
.beam{position:absolute;left:59%;bottom:0;width:2px;height:88%;transform:translateX(-50%);pointer-events:none;
  background:linear-gradient(to top,#ffd2b8,var(--primary) 20%,transparent);filter:blur(.5px);opacity:.9}
.beam::before{content:"";position:absolute;left:50%;bottom:0;width:120px;height:100%;transform:translateX(-50%);
  background:radial-gradient(40% 100% at 50% 100%,color-mix(in srgb,var(--primary) 45%,transparent),transparent 70%);filter:blur(18px)}
.beam::after{content:"";position:absolute;left:50%;bottom:0;width:420px;height:40%;transform:translateX(-50%);
  background:radial-gradient(50% 100% at 50% 100%,color-mix(in srgb,var(--primary) 22%,transparent),transparent 70%);filter:blur(30px)}
@media (prefers-reduced-motion:no-preference){.beam{animation:breathe 5s ease-in-out infinite}}
@keyframes breathe{50%{opacity:.65;height:58%}}
.hero-body{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:32px;align-items:end;padding-block:clamp(120px,14vw,168px) 48px}
.hero h1{margin:18px 0 16px;max-width:13em;font-weight:500;font-size:clamp(30px,3.6vw,46px);line-height:1.12;letter-spacing:-.025em;text-wrap:balance}
:lang(ko) .hero h1{max-width:15em;line-height:1.25;letter-spacing:-.03em}
.hero p{margin:0 0 28px;max-width:30em;color:var(--fg2);font-size:clamp(15px,1.25vw,17px);line-height:1.6}
.demo-card{background:color-mix(in srgb,var(--bg2) 85%,transparent);border:1px solid var(--line);border-radius:12px;padding:10px;backdrop-filter:blur(8px);text-decoration:none;display:block}
.demo-card .t{font-size:13px;margin:2px 4px 8px}
.demo-card .thumb{background:#060608;border-radius:8px;aspect-ratio:16/9;display:grid;place-items:center;overflow:hidden}
.demo-card .thumb svg{width:86%;height:auto}
.demo-card .meta{display:flex;justify-content:space-between;gap:8px;margin:8px 4px 2px;font-size:12px;color:var(--fg2)}
@media (max-width:860px){.beam{left:50%;width:0;height:40%}.hero-body{grid-template-columns:1fr}.demo-card{max-width:320px}}
.marquee{position:relative;border-top:1px solid color-mix(in srgb,var(--line) 70%,transparent);overflow:hidden;
  mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);-webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent)}
.marquee .track{display:flex;gap:56px;width:max-content;padding-block:22px;font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--fg2)}
.marquee .track span{display:inline-flex;align-items:center;gap:10px;white-space:nowrap}
.marquee .track span::before{content:"/";color:var(--fg3)}
@media (prefers-reduced-motion:no-preference){.marquee .track{animation:slide 38s linear infinite}}
@keyframes slide{to{transform:translateX(-50%)}}

/* sections */
section.block{padding-block:clamp(72px,10vw,128px) 0}
.sec-head{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:24px 64px;align-items:end;margin-bottom:36px}
.sec-head h2{margin:14px 0 0;font-family:var(--font-mono);font-weight:300;font-size:clamp(24px,2.8vw,36px);line-height:1.22;letter-spacing:-.02em;color:var(--fg)}
:lang(ko) .sec-head h2{font-family:var(--font-text);font-weight:500;line-height:1.3;letter-spacing:-.03em}
.sec-head h2 span{color:var(--fg3)}
.sec-head p{margin:0;color:var(--fg2);font-size:15px;line-height:1.6;max-width:28em}
@media (max-width:760px){.sec-head{grid-template-columns:1fr}}

.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:20px;min-height:210px;display:flex;flex-direction:column;justify-content:space-between;gap:24px;transition:border-color .2s,background .2s}
.card:hover{border-color:#3a3a44;background:#1c1c22}
.card h3{margin:0;font-size:17px;font-weight:500;display:flex;justify-content:space-between;gap:8px}
.card h3 small{font-family:var(--font-mono);font-size:11px;color:var(--fg3);font-weight:400;letter-spacing:.06em}
.card p{margin:0;color:var(--fg2);font-size:14px;line-height:1.55}
@media (max-width:980px){.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){.cards{grid-template-columns:1fr}.card{min-height:0;gap:36px}}

/* problems */
.probs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.prob{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;display:grid;gap:18px;min-width:0}
.prob .was{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--fg3)}
.prob h3{margin:6px 0 0;font-weight:500;font-size:19px;line-height:1.35;color:var(--fg2)}
.prob .now{border-top:1px dashed var(--line);padding-top:16px}
.prob .now b{display:block;font-weight:500;font-size:17px;color:var(--fg)}
.prob .now span{display:block;margin-top:6px;color:var(--fg2);font-size:14px;line-height:1.55}
.prob .now .tag{display:inline-block;margin:0 0 8px;font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--primary)}
@media (max-width:760px){.probs{grid-template-columns:1fr}}

/* research */
.research{border:1px solid var(--line);border-radius:20px;padding:clamp(28px,4vw,48px);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px 64px;align-items:end;
  background:radial-gradient(80% 140% at 100% 0%,#231a2e 0%,transparent 60%),var(--bg2)}
.research h2{margin:14px 0 0;font-family:var(--font-serif);font-weight:400;font-size:clamp(30px,3.6vw,46px);line-height:1.1}
:lang(ko) .research h2{font-family:var(--font-text);font-weight:500;line-height:1.25;letter-spacing:-.03em}
.research p{margin:0;color:var(--fg2);font-size:15px;line-height:1.65;max-width:30em}
.partners{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;margin-top:22px;font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--fg)}
.partners i{color:var(--fg3);font-style:normal}
.paper{display:grid;gap:12px;border-left:1px solid var(--line);padding-left:28px}
.paper .ptitle{margin:0;font-family:var(--font-serif);font-size:clamp(20px,1.9vw,26px);line-height:1.25;color:var(--fg);max-width:none}
@media (max-width:760px){.research{grid-template-columns:1fr}.paper{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:20px}}

/* demo request (mail link only — no form, nothing stored) */
.cta{margin-top:clamp(72px,10vw,128px);border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg2)}
.cta .wrap{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:28px 64px;align-items:center;padding-block:clamp(56px,8vw,96px)}
.cta h2{margin:16px 0 18px;font-family:var(--font-serif);font-weight:400;font-size:clamp(34px,4.4vw,56px);line-height:1.08;letter-spacing:-.01em}
:lang(ko) .cta h2{font-family:var(--font-text);font-weight:500;line-height:1.25;letter-spacing:-.03em;font-size:clamp(30px,3.8vw,48px)}
.cta p{margin:0;color:var(--fg2);font-size:15px;line-height:1.6;max-width:30em}
.mailbox{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;display:grid;gap:18px;min-width:0}
.mailbox ol{margin:0;padding:0;list-style:none;display:grid;gap:10px;counter-reset:s}
.mailbox li{display:grid;grid-template-columns:28px 1fr;gap:4px;font-size:14px;line-height:1.5;color:var(--fg2);counter-increment:s}
.mailbox li::before{content:counter(s,decimal-leading-zero);font-family:var(--font-mono);font-size:11px;color:var(--fg3);padding-top:3px}
.mailbox .addr{font-family:var(--font-mono);font-size:13px;color:var(--fg);overflow-wrap:anywhere;user-select:all}
.mailbox .row{display:flex;flex-wrap:wrap;align-items:center;gap:12px 16px;justify-content:space-between;border-top:1px dashed var(--line);padding-top:18px}
.mailbox .note{font-size:12px;line-height:1.5;color:var(--fg3);margin:0}
@media (max-width:760px){.cta .wrap{grid-template-columns:1fr}}

/* footer */
footer.site .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:28px;padding-block:44px 56px;color:var(--fg3);font-size:13px}
footer.site .brand{display:grid;gap:14px;align-content:start}
footer.site .brand .mark{color:var(--fg)}
footer.site nav{display:flex;gap:56px;flex-wrap:wrap}
footer.site nav div{display:grid;gap:10px;align-content:start}
footer.site nav b{color:var(--fg2);font-weight:500;font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:4px}
footer.site a{text-decoration:none}
footer.site a:hover{color:var(--fg)}
footer.site small{font-size:11px;color:var(--fg3)}

/* 404 */
.notfound{min-height:100vh;display:grid;align-content:center;gap:18px;padding-block:120px}
.notfound h1{margin:0;font-family:var(--font-serif);font-weight:400;font-size:clamp(40px,6vw,72px);line-height:1.05}
.notfound p{margin:0;color:var(--fg2);max-width:30em;line-height:1.6}
.notfound .links{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}
.pill-ghost{border:1px solid var(--line);color:var(--fg)}
.pill-ghost:hover{border-color:var(--fg3)}

/* intro overlay (logo motion, see DESIGN_NOTES) */
.intro{position:fixed;inset:0;z-index:20;background:var(--bg);display:grid;place-items:center;overflow:hidden}
.intro::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(90deg,var(--grid) 1px,transparent 1px),linear-gradient(0deg,var(--grid) 1px,transparent 1px);
  background-size:calc(100% / 6) 100%,100% 96px}
.stage{position:relative;display:flex;align-items:center;gap:.02em;font-family:var(--font-display);font-weight:800;
  font-size:clamp(88px,22vw,280px);line-height:1;width:max-content;transform-origin:0 0}
.slash{position:relative;width:.4em;height:.86em;flex:none;margin-right:.02em}
.slash svg{position:absolute;inset:0;width:100%;height:100%;display:block;overflow:visible}
.slash polygon{fill:var(--fg)}
.slash .dot{position:absolute;left:4.8%;bottom:0;width:35.7%;height:14%;background:var(--fg);opacity:0;transform-origin:50% 100%}
.flap{position:relative;width:.86em;height:1em;flex:none;perspective:2.2em}
.half{position:absolute;left:0;right:0;height:50%;overflow:hidden;background:transparent;transition:background .5s}
.half.top{top:0;transform-origin:50% 100%;border-radius:.05em .05em 0 0}
.half.bot{bottom:0;transform-origin:50% 0;border-radius:0 0 .05em .05em}
.g{position:absolute;left:0;right:0;height:1em;line-height:1em;text-align:center;color:var(--fg)}
.half.top .g{top:.03em}
.half.bot .g{top:-.47em}
.leaf{visibility:hidden;backface-visibility:hidden;z-index:2}
.seam{position:absolute;left:0;right:0;top:50%;height:.012em;min-height:1px;background:var(--bg);opacity:0;transition:opacity .4s;z-index:3}
.stage.tiled .half{background:#202027}
.stage.tiled .seam{opacity:1}
.flap.off .half,.flap.off .g{visibility:hidden}
.scan{position:absolute;top:-.06em;bottom:-.06em;left:0;width:2px;background:var(--primary);opacity:0;pointer-events:none;z-index:4;
  box-shadow:0 0 12px 1px color-mix(in srgb,var(--primary) 70%,transparent)}
.scan::before{content:"";position:absolute;right:2px;top:0;bottom:0;width:.9em;background:linear-gradient(90deg,transparent,color-mix(in srgb,var(--primary) 16%,transparent))}
.intro-skip{position:absolute;right:16px;bottom:calc(16px + env(safe-area-inset-bottom,0px));height:34px;padding-inline:12px;border-radius:999px;border:1px solid var(--line);background:transparent;color:var(--fg2);font:inherit;font-size:12px;cursor:pointer}
.intro-skip:hover{color:var(--fg)}