:root{--bg:#000;--bg2:#0b0c0e;--panel:#141519;--ink:#f5f5f7;--muted:#a1a1a6;--dim:#6e6e73;--rail:#d2d2d7;--acc:#16c7b4;--acc2:#3ef08f;--grid:rgba(22,199,180,.07);--line:#2a2b30;
--f:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,monospace;color-scheme:dark}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.47 var(--f);letter-spacing:-.01em;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:var(--acc2)}a:focus-visible{outline:2px solid var(--acc);outline-offset:3px}
.gutter{padding-inline:max(20px,env(safe-area-inset-left))}
/* nav */
.nav{position:sticky;top:0;z-index:20;backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);background:rgba(0,0,0,.72);border-bottom:1px solid rgba(255,255,255,.08)}
.nav .in{max-width:1080px;margin:0 auto;height:48px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:9px;color:var(--ink);text-decoration:none;font-weight:600;font-size:15px}
.brand .mark{width:26px;height:auto}
.langs{display:flex;gap:2px;font-size:12px}
.langs a{color:var(--muted);text-decoration:none;padding:4px 9px;border-radius:999px}
.langs a[aria-current]{color:var(--ink);background:rgba(255,255,255,.12)}
.langs a:hover{color:var(--ink)}
/* mark */
.mark path{fill:none;stroke-linecap:round;stroke-linejoin:round}
.m-rail{stroke:var(--rail);stroke-width:7}.m-main{stroke:var(--rail);stroke-width:5}.m-side{stroke:var(--acc);stroke-width:5}.m-wheel{fill:var(--acc)}
/* hero */
.hero{background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:44px 44px;background-position:center;min-height:min(100svh,980px);display:grid;place-items:center;text-align:center;position:relative;overflow:hidden;padding-block:80px 60px}
.hero::before{content:"";position:absolute;inset:-20%;background:radial-gradient(40% 35% at 50% 58%,rgba(22,199,180,.22),transparent 70%);pointer-events:none;opacity:calc(1 - var(--p,0)*1.6)}
.hero .inner{display:grid;justify-items:center;gap:22px;position:relative;transform:translateY(calc(var(--p,0)*-80px)) scale(calc(1 - var(--p,0)*.08));opacity:calc(1 - var(--p,0)*1.4)}
.logoanim{display:grid;justify-items:center;gap:10px}
.hero .mark{width:clamp(110px,15vw,170px);height:auto;overflow:visible}
/* 1) the human programmer: rails + main rung draw in, white */
.hero .mark .m-rail,.hero .mark .m-main{stroke-dasharray:240;stroke-dashoffset:240;animation:draw 1.1s cubic-bezier(.6,0,.2,1) forwards}
.hero .mark .m-main{animation-delay:.45s}
/* 2) the sidecar drives in from the left and docks onto the rung */
.hero .mark .sg{opacity:0;transform:translateX(-70px);animation:arrive 1.1s cubic-bezier(.2,.9,.25,1.15) 1.75s forwards}
.hero .mark .m-wheel{transform-box:fill-box;transform-origin:center}
/* 3) docked: a short green pulse along the branch */
.hero .mark .m-side{animation:dock .9s ease-out 2.85s 1}
.who{display:flex;gap:10px;font:600 12px var(--mono);letter-spacing:.14em;text-transform:uppercase}
.who .w1{color:var(--rail);opacity:0;animation:pop .5s .9s forwards}
.who .w2{color:var(--acc2);opacity:0;transform:translateX(-12px);animation:arrive .6s ease-out 2.2s forwards}
@keyframes arrive{to{opacity:1;transform:none}}
@keyframes dock{0%{filter:none}35%{filter:drop-shadow(0 0 7px rgba(62,240,143,.95))}100%{filter:none}}
@keyframes draw{to{stroke-dashoffset:0}}@keyframes pop{to{opacity:1}}
.status{font:600 12px var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--acc2);padding:6px 12px;border:1px solid rgba(62,240,143,.35);border-radius:999px;background:rgba(62,240,143,.06)}
h1{margin:0;font-size:clamp(3.4rem,13vw,9rem);line-height:.95;letter-spacing:-.045em;font-weight:700}
h1 .plc{font-family:var(--mono);font-weight:500;font-size:.4em;letter-spacing:0;vertical-align:.5em;margin-right:.12em;padding:.02em .2em;border:3px solid currentColor;border-radius:10px}
h1 .sc{background:linear-gradient(90deg,var(--acc) 10%,var(--acc2) 90%);-webkit-background-clip:text;background-clip:text;color:transparent}
.tagline{margin:0;font-size:clamp(1.5rem,3.6vw,2.6rem);font-weight:600;letter-spacing:-.025em;line-height:1.1}
.lead{margin:0;max-width:38ch;font-size:clamp(1.05rem,1.8vw,1.3rem);color:var(--muted)}
.fade-in{opacity:0;transform:translateY(24px);animation:up 1s cubic-bezier(.2,.7,.2,1) forwards}
.d1{animation-delay:.4s}.d2{animation-delay:.65s}.d3{animation-delay:.9s}.d4{animation-delay:1.15s}
@keyframes up{to{opacity:1;transform:none}}
.cue{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);font-size:12px;color:var(--dim);letter-spacing:.1em;text-transform:uppercase;display:grid;justify-items:center;gap:8px}
.cue i{width:1px;height:34px;background:linear-gradient(var(--dim),transparent);animation:cue 2s infinite}
@keyframes cue{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}
.maker{margin:6px 0 0;font:500 clamp(.85rem,1.3vw,1rem) var(--mono);color:var(--ink);letter-spacing:.02em}
.maker span{color:var(--acc2)}
/* sticky rung story */
.story{height:420vh;position:relative}
.story .stick{background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:44px 44px;position:sticky;top:48px;height:calc(100svh - 48px);display:grid;align-content:center;gap:clamp(24px,5vh,56px);overflow:hidden}
.story .wrapx{max-width:1180px;width:100%;margin:0 auto}
.rungbox{overflow:hidden}
.rung{width:100%;height:auto;display:block}
.rung .rail{stroke:var(--rail);stroke-width:5}
.rung .w{stroke:#3a3b40;stroke-width:3;fill:none}
.rung .on{stroke:var(--acc2);stroke-width:3.5;fill:none;filter:drop-shadow(0 0 6px rgba(62,240,143,.75))}
.rung .el{stroke:#5f6066;stroke-width:3;fill:none;transition:stroke .4s}
.rung .el.lit{stroke:var(--acc2)}
.rung .box{stroke:#5f6066;stroke-width:3;fill:#101114;transition:stroke .4s,fill .4s}
.rung .box.lit{stroke:var(--acc2);fill:#0b1a17}
.rung .lbl{fill:var(--ink);font:500 15px var(--mono)}.rung .sub{fill:var(--dim);font:12px var(--mono)}
.rung .bl{fill:var(--ink);font:700 19px var(--f)}.rung .pin{fill:var(--dim);font:11px var(--mono)}
.caps{display:grid;justify-items:center;text-align:center;min-height:9.5em;position:relative}
.cap{position:absolute;inset:0;display:grid;justify-items:center;align-content:start;gap:10px;opacity:0;transform:translateY(18px);transition:opacity .5s,transform .6s cubic-bezier(.2,.7,.2,1)}
.cap.show{opacity:1;transform:none}
.cap .n{font:600 13px var(--mono);color:var(--acc);letter-spacing:.12em}
.cap h2{margin:0;font-size:clamp(2rem,5vw,3.6rem);letter-spacing:-.035em;line-height:1.05}
.cap p{margin:0;max-width:44ch;color:var(--muted);font-size:clamp(1rem,1.6vw,1.2rem)}
.ticks{display:flex;gap:8px;justify-content:center}
.ticks i{width:28px;height:3px;border-radius:2px;background:#2a2b30;overflow:hidden;position:relative}
.ticks i::after{content:"";position:absolute;inset:0;background:var(--acc);transform:scaleX(var(--t,0));transform-origin:left}
/* section headings */
.sec{max-width:1080px;margin:0 auto;padding-block:clamp(90px,14vh,160px) 40px;text-align:center;display:grid;gap:16px;justify-items:center}
.sec h2{margin:0;font-size:clamp(2.4rem,6vw,4.6rem);letter-spacing:-.04em;line-height:1.02}
.sec p{margin:0;max-width:46ch;color:var(--muted);font-size:clamp(1.05rem,1.8vw,1.35rem)}
/* device window */
.window{border-radius:10px;overflow:hidden;background:#1b1c20;box-shadow:0 0 0 1px rgba(255,255,255,.08),0 40px 120px -30px rgba(0,0,0,.9),0 0 120px -40px rgba(22,199,180,.35)}
.window .bar{height:30px;display:flex;align-items:center;gap:7px;padding-inline:12px;background:#232428;border-bottom:1px solid rgba(255,255,255,.06)}
.window .bar i{width:11px;height:11px;border-radius:50%;background:#3a3b40}
.window .bar i:nth-child(1){background:#ff5f57}.window .bar i:nth-child(2){background:#febc2e}.window .bar i:nth-child(3){background:#28c840}
.window .bar span{margin-left:10px;font:12px var(--mono);color:var(--dim)}
.window img{width:100%;height:auto;image-rendering:auto}
.showcase{max-width:1365px;margin:0 auto;perspective:1600px;padding-bottom:40px}
.showcase .window{transform-origin:50% 0;transform:rotateX(calc((1 - var(--p,0))*24deg)) scale(calc(.82 + var(--p,0)*.18)) translateY(calc((1 - var(--p,0))*40px))}
.showcase.done .window,.panel.done .window,.panel.done .txt{transform:none!important;opacity:1!important}
/* panels */
.panels{max-width:1240px;margin:0 auto;display:grid;gap:clamp(110px,18vh,200px);padding-block:clamp(60px,10vh,120px)}
.panel{display:grid;gap:clamp(28px,4vh,44px);justify-items:center}
.panel .txt{display:grid;gap:12px;justify-items:center;text-align:center;max-width:760px;min-width:0}
.panel .k{font:600 12px var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--acc)}
.panel h3{margin:0;font-size:clamp(2rem,4.6vw,3.6rem);letter-spacing:-.04em;line-height:1.03}
.panel p{margin:0;color:var(--muted);font-size:clamp(1.02rem,1.6vw,1.25rem);max-width:52ch}
.panel .window{width:100%;max-width:1365px;transform:translateY(calc((1 - var(--p,0))*80px));opacity:calc(.25 + var(--p,0)*.75)}
.panel .txt{transform:translateY(calc((1 - var(--p,0))*40px));opacity:calc(var(--p,0)*1.2)}
/* languages */
.langsec .k{font:600 12px var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--acc2)}
.ltiles{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;padding-bottom:20px}
.lt{display:grid;gap:8px;align-content:start;padding:22px 20px;border:1px solid var(--line);border-radius:10px;background:linear-gradient(180deg,#121417,#0c0d0f);min-width:0;
 opacity:calc((var(--p,0) * 8 - var(--i)) * .6);transform:translateY(calc(max(0, 1 - (var(--p,0) * 8 - var(--i))) * 30px))}
.lt b{font:700 clamp(1.6rem,3.2vw,2.4rem)/1 var(--mono);letter-spacing:-.02em;background:linear-gradient(90deg,var(--acc),var(--acc2));-webkit-background-clip:text;background-clip:text;color:transparent}
.lt span{color:var(--muted);font-size:.92rem}
@media (max-width:900px){.ltiles{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (prefers-reduced-motion:reduce){.lt{opacity:1!important;transform:none!important}}
/* language tiles as links */
a.lt{color:var(--ink);text-decoration:none;position:relative;transition:border-color .25s,background .25s}
a.lt i{position:absolute;right:16px;top:18px;font-style:normal;color:var(--dim);transition:transform .25s,color .25s}
a.lt:hover{border-color:rgba(62,240,143,.55);background:linear-gradient(180deg,#14201c,#0c0d0f)}
a.lt:hover i{color:var(--acc2);transform:translateX(4px)}
/* detail pages */
.dhero{max-width:1080px;margin:0 auto;padding-block:70px 40px;display:grid;gap:16px;justify-items:center;text-align:center}
.back{justify-self:start;font:500 13px var(--mono);color:var(--muted);text-decoration:none}.back:hover{color:var(--acc2)}
.dname{font:700 clamp(4rem,14vw,10rem)/.9 var(--mono);letter-spacing:-.04em;background:linear-gradient(90deg,var(--acc),var(--acc2));-webkit-background-clip:text;background-clip:text;color:transparent;animation:up 1s cubic-bezier(.2,.7,.2,1) both}
.dh{margin:0;font-size:clamp(2rem,5vw,3.6rem);letter-spacing:-.04em;line-height:1.05}
.pts{max-width:1080px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px;padding-block:10px 50px}
.pt{padding:20px;border:1px solid var(--line);border-radius:10px;background:var(--panel);display:grid;gap:8px;align-content:start;min-width:0}
.pt h3{margin:0;font-size:1.1rem;letter-spacing:-.01em}.pt p{margin:0;color:var(--muted);font-size:.95rem}
.shots{max-width:1240px;margin:0 auto;display:grid;gap:clamp(60px,10vh,110px);padding-block:30px 80px}
.shots>.k{font:600 12px var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--acc2);text-align:center}
.shot{margin:0;display:grid;gap:14px}
.shot .window{transform:translateY(calc((1 - var(--p,0))*60px));opacity:calc(.25 + var(--p,0)*.75)}
.shot.done .window{transform:none;opacity:1}
.shot figcaption{text-align:center;color:var(--muted);font-size:.95rem}
.artbox{padding:30px;border:1px solid var(--line);border-radius:10px;background:#0b0c0e}
.art{width:100%;height:auto}
.art .rail{stroke:var(--rail);stroke-width:5}.art .w{stroke:var(--acc2);stroke-width:3;fill:none}.art .el{stroke:var(--rail);stroke-width:3;fill:none}
.art .lbl{fill:var(--ink);font:500 15px var(--mono)}.art .sub{fill:var(--muted);font:13px var(--mono)}
.art .gs rect{fill:#101114;stroke:var(--acc);stroke-width:2.5}.art .ga rect{fill:#0d1f1b;stroke:var(--acc2);stroke-width:2}.art text{fill:var(--ink);font:600 15px var(--mono)}
.pn{max-width:1080px;margin:0 auto;display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:center;padding-block:20px 50px}
.pn a{color:var(--ink);text-decoration:none;display:grid;gap:4px;padding:16px 18px;border:1px solid var(--line);border-radius:10px;background:var(--panel)}
.pn a span{font:500 12px var(--mono);color:var(--muted)}.pn a b{font:700 1.3rem var(--mono)}
.pn a.nx{text-align:right}.pn a.all{border:0;background:none;color:var(--muted);font:500 13px var(--mono)}
.pn a:hover{border-color:rgba(62,240,143,.5)}
@media (max-width:700px){.pn{grid-template-columns:1fr 1fr}.pn a.all{display:none}}
/* platform */
.plat .k{font:600 12px var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--acc2)}
.macbox{max-width:1080px;margin:0 auto;overflow-x:auto}
.mac{width:100%;min-width:640px;height:auto;display:block;transform:translateY(calc((1 - var(--p,0))*60px)) scale(calc(.92 + var(--p,0)*.08));opacity:calc(.2 + var(--p,0)*.8)}
.mac .lid{fill:#1a1b1f;stroke:#3a3b40;stroke-width:2}.mac .scr{fill:#050607}.mac .base{fill:#2a2b30}
.mac .win{fill:#111316;stroke:#2f3136}.mac .win.a{stroke:rgba(22,199,180,.6)}.mac .tb{fill:#1c1e22}.mac .tb2{fill:#2b2d33}
.mac .wt{fill:var(--ink);font:600 15px var(--f)}.mac .tt{fill:var(--ink);font:700 20px var(--f)}.mac .ts{fill:var(--muted);font:12px var(--mono)}
.mac .tl{fill:var(--acc2);font:11px var(--mono)}
.mac .tia{fill:#0d2230;stroke:#2e6f8e}.mac .pc{fill:#111316;stroke:#3a3b40;stroke-dasharray:4 4}
.mac .tun{stroke:var(--acc2);stroke-width:3;stroke-dasharray:6 8;fill:none;animation:flow 1.2s linear infinite;filter:drop-shadow(0 0 5px rgba(62,240,143,.7))}
.mac .tun.far{opacity:.7}
.mac .m-rail{stroke:var(--rail);stroke-width:7;fill:none;stroke-linecap:round}.mac .m-main{stroke:var(--rail);stroke-width:5;fill:none}.mac .m-side{stroke:var(--acc);stroke-width:5;fill:none;stroke-linejoin:round}.mac .m-wheel{fill:var(--acc)}
@keyframes flow{to{stroke-dashoffset:-28}}
.pitems{max-width:1080px;margin:28px auto 0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}
.pi{display:grid;gap:4px;padding:14px 16px;border:1px solid var(--line);border-radius:8px;background:var(--panel);min-width:0}
.pi strong{font-size:1rem;letter-spacing:-.01em}.pi span{font-size:.85rem;color:var(--muted)}
.pi:first-child{border-color:rgba(62,240,143,.5);box-shadow:inset 0 2px 0 var(--acc2)}
@media (max-width:900px){.pitems{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (prefers-reduced-motion:reduce){.mac{transform:none!important;opacity:1!important}}
/* path */
.path{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px;padding-bottom:40px}
.hop{background:var(--panel);border-radius:8px;padding:18px 16px;display:grid;gap:6px;align-content:start;min-width:0;border:1px solid var(--line);
 opacity:calc(.2 + var(--h,0)*.8);transform:translateY(calc((1 - var(--h,0))*24px));transition:border-color .4s}
.hop .w{font:600 11px var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--dim)}
.hop strong{font-size:1.2rem;letter-spacing:-.02em}
.hop span{font-size:.88rem;color:var(--muted)}
.hop.us{border-color:rgba(62,240,143,.5);box-shadow:inset 0 2px 0 var(--acc2)}.hop.us strong{color:var(--acc2)}
.hop.sie{background:#0e0f12}
@media (max-width:900px){.path{grid-template-columns:repeat(2,minmax(0,1fr))}}
/* close */
.close{min-height:80svh;display:grid;place-items:center;text-align:center;padding-block:120px;position:relative;overflow:hidden}
.close::before{content:"";position:absolute;inset:0;background:radial-gradient(45% 40% at 50% 55%,rgba(22,199,180,calc(var(--p,0)*.28)),transparent 70%)}
.close .inner{display:grid;gap:20px;justify-items:center;position:relative;transform:scale(calc(.9 + var(--p,0)*.1));opacity:calc(var(--p,0)*1.3)}
.close h2{margin:0;font-size:clamp(2.6rem,8vw,6.4rem);letter-spacing:-.045em;line-height:1}
.close p{margin:0;max-width:40ch;color:var(--muted);font-size:clamp(1.05rem,1.8vw,1.35rem)}
.close .mark{width:90px;height:auto}
footer{max-width:1080px;margin:0 auto;padding-block:30px 50px;border-top:1px solid var(--line);font-size:12px;color:var(--dim);display:grid;gap:6px}
@media (prefers-reduced-motion:reduce){
 *{animation:none!important;transition:none!important}
 .fade-in{opacity:1;transform:none}.hero .mark *{stroke-dashoffset:0!important;opacity:1!important}.hero .mark .sg,.who span{opacity:1!important;transform:none!important}
 .hero .inner,.showcase .window,.panel .window,.panel .txt,.hop,.close .inner{transform:none!important;opacity:1!important}
 .story{height:auto}.story .stick{position:static;height:auto;padding-block:80px}
 .caps{min-height:0;display:grid;gap:40px}.cap{position:static;opacity:1;transform:none}
}