/* 4D-ID public design system. Palette retained; fonts served locally. */
@font-face{font-family:Inter;src:url('assets/fonts/inter-latin.woff2') format('woff2');font-weight:100 900;font-style:normal;font-display:swap}
:root{--bg:#0b0f14;--bg2:#111820;--panel:#141c26;--line:#233140;--ink:#eaf1f8;--muted:#a0afbf;--a1:#4dd0c4;--a2:#7c8cff;--warm:#ff7a59;--font:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--mono:'SF Mono',Menlo,Consolas,monospace;--radius:16px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.7;-webkit-font-smoothing:antialiased}::selection{background:#4dd0c43d;color:#fff}a{color:var(--a1);text-decoration:none}a:hover{text-decoration:underline}button,input,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}img{max-width:100%;height:auto}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--a1);outline-offset:5px}button{cursor:pointer}[hidden]{display:none!important}.skip-link{position:fixed;left:20px;top:-100px;padding:12px 20px;background:var(--a1);color:var(--bg);z-index:200}.skip-link:focus{top:12px}.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}.site-header{position:sticky;top:0;z-index:40;border-bottom:1px solid #233140b3;background:#0b0f14ed;backdrop-filter:blur(20px)}.site-header .header-inner{max-width:1328px;margin:auto;min-height:76px;padding:0 40px;display:flex;align-items:center;justify-content:space-between;gap:24px}.site-brand{display:inline-flex;align-items:center;gap:11px;color:var(--ink);font-size:21px;font-weight:800;letter-spacing:-.06em;white-space:nowrap}.site-brand:hover{text-decoration:none}.brand-mark{width:34px;height:38px;flex:none}.site-brand sup{font-size:10px;letter-spacing:0;margin-left:1px;align-self:flex-start;margin-top:8px}.site-nav{display:flex;align-items:center;gap:30px}.site-nav a{font-size:11px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.1em;transition:color .2s}.site-nav a:hover,.site-nav a[aria-current=page]{color:var(--a1);text-decoration:none}.site-nav .nav-cta{color:var(--bg);background:var(--a1);border:1px solid var(--a1);border-radius:7px;padding:10px 17px;text-transform:none;letter-spacing:0;font-size:12px}.site-nav .nav-cta:hover{color:var(--bg);background:#76e0d7}.site-footer{padding:54px 0 26px;border-top:1px solid var(--line);background:#090d12;font-size:13px;color:var(--muted)}.footer-top{display:flex;justify-content:space-between;gap:30px;align-items:start;margin-bottom:32px}.footer-top p{max-width:390px;margin:13px 0 0}.footer-links{display:flex;flex-wrap:wrap;gap:24px}.footer-links a{color:var(--muted)}.footer-bottom{display:flex;justify-content:space-between;gap:16px;font-size:11px;border-top:1px solid var(--line);padding-top:24px;color:var(--muted)}.eyebrow,.kick,.section-label{display:block;font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--a1)}.gradient,.home-page h1 .g{background:linear-gradient(110deg,var(--a1),var(--a2));background-clip:text;-webkit-background-clip:text;color:transparent}.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;padding:13px 22px;border:1px solid transparent;border-radius:8px;background:linear-gradient(115deg,var(--a1),#74b8dd);color:#08252a;font-size:13px;font-weight:700;transition:transform .2s,box-shadow .2s}.btn:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 8px 28px #4dd0c420}.btn.ghost{background:transparent;border-color:var(--line);color:var(--ink)}.btn.ghost:hover{border-color:var(--a1)}.section-label{margin-bottom:22px}.home-page h2,.demos-page h1{font-size:clamp(30px,3.4vw,44px);line-height:1.15;letter-spacing:-.045em}.home-page h2{margin:0 0 18px;max-width:800px}.home-page h3{letter-spacing:-.02em}.home-page section{padding:88px 0;border-bottom:1px solid var(--line)}.home-page .section-lede{max-width:760px;color:var(--muted);font-size:16px;line-height:1.85;margin:0 0 34px}.home-page .hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:radial-gradient(ellipse at 83% 40%,#4dd0c40b,transparent 58%),var(--bg)}.home-page .hero::before,.writing-hero::before{content:'';position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(#7c8cff40 .7px,transparent .7px);background-size:26px 26px;mask-image:linear-gradient(90deg,transparent,#000);opacity:.45}.home-page .hero .wrap{position:relative;display:grid;grid-template-columns:1.18fr 1fr;gap:26px;padding-top:96px;padding-bottom:84px;align-items:center}.home-page .hero-copy{position:relative;z-index:1}.home-page .kick{display:inline-block;border:1px solid #4dd0c42e;background:#4dd0c409;border-radius:30px;padding:7px 13px;font-size:9px;letter-spacing:.1em}.home-page h1{font-size:clamp(48px,6.3vw,82px);font-weight:850;line-height:1.04;letter-spacing:-.065em;margin:26px 0}.home-page .sub{color:var(--muted);font-size:17px;line-height:1.85;max-width:580px;margin:0 0 30px}.home-page .cta{display:flex;gap:12px;flex-wrap:wrap}.home-page .live{display:flex;align-items:center;gap:9px;width:100%;font-family:var(--mono);font-size:10px;color:var(--muted);margin-top:12px}.dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--a1);box-shadow:0 0 12px #4dd0c488}.hero-art{margin:0;position:relative;border:1px solid #233140a0;border-radius:18px;overflow:hidden;background:#101821}.hero-art img{display:block;width:100%;aspect-ratio:1.16;object-fit:cover}.hero-art figcaption{position:absolute;left:22px;bottom:20px;font-family:var(--mono);font-size:9px;letter-spacing:.13em;color:var(--muted);text-transform:uppercase}.hero-art::after{content:'01 / SHARED IDENTITY';position:absolute;top:20px;left:22px;color:var(--a1);font:9px var(--mono);letter-spacing:.13em}.grid3,.home-page .try{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.home-page .card,.home-page .try-card{background:linear-gradient(130deg,#141c267a,#10161e);border:1px solid var(--line);border-radius:var(--radius);padding:28px;color:inherit}.home-page .card .k,.home-page .try-card .n{font:10px var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--a2)}.home-page .card h3,.home-page .try-card h3{font-size:20px;line-height:1.4;margin:16px 0 12px}.home-page .card p,.home-page .try-card p{font-size:14px;color:var(--muted);margin:0;line-height:1.8}.home-page .try-card{transition:border-color .2s,transform .2s}.home-page .try-card:hover{border-color:var(--a1);transform:translateY(-4px);text-decoration:none}.home-page .try-card .go{display:block;margin-top:26px;color:var(--a1);font-size:12px;font-weight:600}.home-page .callout{border-left:2px solid var(--a1);background:linear-gradient(90deg,#4dd0c408,transparent);padding:24px 28px;margin:32px 0 0;font-size:18px;font-weight:400}.home-page .callout strong{font-weight:500}.home-page pre{background:#080c11;border:1px solid var(--line);border-radius:12px;padding:24px;overflow:auto;color:#cfe0ee;font:12px/1.85 var(--mono)}.home-page pre .c{color:var(--muted)}.home-page pre .s{color:var(--a1)}.home-page table{width:100%;border-collapse:collapse;font-size:13px;min-width:580px}.table-scroll{overflow-x:auto}.home-page th,.home-page td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line)}.home-page th{font:10px var(--mono);letter-spacing:.08em;color:var(--muted);text-transform:uppercase}.home-page td code{color:var(--a1);font-size:12px}.home-page .pill{display:inline-block;margin:10px 6px 0 0;border:1px solid var(--line);padding:4px 9px;border-radius:6px;color:var(--muted);font:10px var(--mono)}.home-page .pill.ok{color:var(--a1);border-color:#4dd0c43a}.home-page .writing-preview{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}.writing-preview img{display:block;border:1px solid var(--line);border-radius:var(--radius)}.home-page footer .fine{font-size:11px;margin-top:24px;color:var(--muted)}
/* Demo library */
.demos-page main{padding:84px 0 88px}.demos-page h1{font-size:clamp(42px,5.4vw,68px);margin:24px 0}.demos-page .lede{font-size:17px;color:var(--muted);max-width:730px;margin-bottom:52px}.demos-page .grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.demos-page a.card{display:flex;flex-direction:column;background:linear-gradient(130deg,#141c267a,#10161e);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;color:var(--ink);transition:border-color .2s,transform .2s}.demos-page a.card:hover{border-color:var(--a1);transform:translateY(-4px);text-decoration:none}.demos-page .art{width:100%;aspect-ratio:1.5;object-fit:cover;border-bottom:1px solid var(--line)}.demos-page .in{padding:26px;display:flex;flex-direction:column;flex:1}.demos-page .k{font:10px var(--mono);color:var(--a2);text-transform:uppercase;letter-spacing:.12em}.demos-page h2{font-size:22px;letter-spacing:-.03em;line-height:1.3;margin:14px 0}.demos-page .in p{font-size:14px;color:var(--muted);margin:0 0 24px}.demos-page .go{font-size:12px;margin-top:auto;color:var(--a1);font-weight:600}.demos-page .note{margin-top:42px;border-top:1px solid var(--line);padding-top:26px;font:11px/1.8 var(--mono);color:var(--muted)}
/* Interactive demos: style only; scripts, IDs and viewport controls stay intact. */
.demo-page{font-family:var(--font)}.demo-page .top{height:64px;padding:0 22px;background:#0b0f14;border-bottom:1px solid var(--line);gap:12px}.demo-page .top .site-brand{font-size:18px}.demo-page .top .brand-mark{width:26px;height:30px}.demo-page .top .right{font-size:11px;gap:20px}.demo-page .top .muted{font-size:11px}.demo-page .layout{height:calc(100% - 64px)}.demo-page aside{padding:22px;background:#0e141c}.demo-page aside h1{font-size:21px;line-height:1.25;letter-spacing:-.04em;margin-bottom:12px}.demo-page .card{background:#111923;border-color:#233140;border-radius:12px;padding:16px;margin-bottom:14px}.demo-page .card .k{font:9px var(--mono);letter-spacing:.12em}.demo-page .card h3{margin:8px 0;font-size:14px}.demo-page button{font-family:var(--font);transition:filter .2s}.demo-page button:hover{filter:brightness(1.13)}.demo-page .sandbox{font:9px var(--mono);border-color:#ff7a5966;padding:5px 8px}.demo-page .log,.demo-page .out{background:#090e14}
@media(min-width:821px){.demo-page .layout{grid-template-columns:370px minmax(0,1fr)}}
@media(max-width:1000px){.site-nav{gap:20px}.home-page .hero .wrap{grid-template-columns:1.3fr 1fr;gap:14px}.home-page h1{font-size:62px}.home-page .kick{font-size:8px}.home-page .live{font-size:9px}.demos-page .grid{gap:16px}.demos-page .in{padding:20px}}
@media(max-width:820px){.home-page .hero .wrap{grid-template-columns:1fr;padding-top:64px;padding-bottom:52px}.hero-art{max-width:580px;margin-top:24px}.hero-art img{aspect-ratio:1.8}.home-page h1{font-size:clamp(46px,8vw,72px)}.grid3,.home-page .try,.demos-page .grid{grid-template-columns:1fr}.home-page section{padding:58px 0}.home-page .writing-preview{grid-template-columns:1fr;gap:30px}.demos-page .art{aspect-ratio:2.1}.demo-page .top .muted,.demo-page .sandbox{display:none}.demo-page:not(.globe-page){height:100dvh;overflow:hidden}.demo-page:not(.globe-page) .layout{height:calc(100dvh - 64px);grid-template-rows:minmax(170px,42%) minmax(220px,1fr);grid-template-columns:1fr}.demo-page aside{min-height:0;overflow:auto;border-bottom:1px solid var(--line);border-right:0}.demo-page #stage{min-height:0}.demo-page.globe-page .layout{height:auto;grid-template-columns:1fr}.demo-page.globe-page #globe{height:65vh;min-height:340px}.demo-page #hud{max-width:calc(100% - 28px);font-size:10px}}
@media(max-width:600px){.wrap{padding-left:22px;padding-right:22px}.site-header .header-inner{padding:14px 22px;gap:12px;flex-wrap:wrap}.site-brand{font-size:20px}.site-header .site-brand{margin:auto}.site-nav{width:100%;justify-content:center;gap:21px}.site-nav a{font-size:10px}.site-nav .nav-cta{display:none}.site-header .brand-mark{width:27px;height:29px}.site-header .site-brand sup{margin-top:3px}.home-page .hero .wrap{padding-top:46px}.home-page .kick{font-size:8px;letter-spacing:.06em}.home-page h1{font-size:49px}.home-page .sub{font-size:15px}.home-page .live{font-size:8px}.home-page .btn{font-size:12px;padding:12px 17px}.home-page .card,.home-page .try-card{padding:24px}.footer-top,.footer-bottom{flex-direction:column}.footer-links{gap:20px}.site-footer{padding-top:36px}.demos-page main{padding-top:50px}.demos-page h1{font-size:44px}.demos-page .lede{font-size:15px}.demo-page .top{padding:0 14px}.demo-page .top .right{gap:12px}.demo-page .top .site-brand{font-size:16px}.demo-page #pick{max-width:calc(100% - 28px)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}

/* Keep all camera tools reachable in short phone viewports. */
@media(max-width:820px){.demo-page .ctl{display:grid;grid-template-columns:repeat(2,40px);max-height:calc(100% - 72px);overflow-y:auto;overscroll-behavior:contain}.demo-page .ctl .sep{display:none}.demo-page #hud{max-width:calc(100% - 125px)}}
@media(max-width:600px){.site-nav a{padding-top:7px;padding-bottom:7px}}