:root{color-scheme:light;--ink:#122936;--muted:#465a64;--paper:#f7f5ee;--line:#d5dcd7;--aqua:#c4dbd4;--gold:#dec58f;--night:#122832;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;scroll-behavior:smooth}
*{box-sizing:border-box}html,body{margin:0}body{background:var(--paper);color:var(--ink);line-height:1.5}a{color:inherit}button{font:inherit}img,svg{display:block;max-width:100%}a:focus-visible,button:focus-visible{outline:3px solid #195ca9;outline-offset:4px}.skip{position:absolute;top:8px;left:8px;transform:translateY(-150%);background:#fff;color:#132b3b;padding:10px;z-index:10}.skip:focus{transform:none}.wrap{width:min(1160px,calc(100% - 64px));margin:auto}
header{border-bottom:1px solid var(--line)}.nav{min-height:78px;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;gap:10px;font-weight:750;letter-spacing:-.035em;text-decoration:none;font-size:22px}.brand svg{width:27px;height:27px}.nav-links{margin-left:auto;display:flex;align-items:center;gap:27px;font-size:14px;font-weight:650}.nav-links a{text-decoration:none}.nav-links a:hover{text-decoration:underline}.langs{display:flex;align-items:center;gap:3px;border-left:1px solid var(--line);padding-left:19px}.langs a{padding:8px 6px;text-decoration:none;font-size:12px}.langs [aria-current]{text-decoration:underline;text-underline-offset:4px;font-weight:800}
.hero{padding:80px 0 70px;display:grid;grid-template-columns:1fr 1.05fr;gap:38px;align-items:center}.tag{display:flex;align-items:center;gap:10px;font-size:11px;letter-spacing:.16em;text-transform:uppercase;font-weight:800;color:#315769}.tag:before{content:"";width:27px;height:2px;background:#527e75}.hero h1,.section-heading h2,.final h2{font-family:Georgia,"Times New Roman",serif;letter-spacing:-.055em;font-weight:400;line-height:1.01}.hero h1{font-size:clamp(55px,6.2vw,85px);max-width:9ch;margin:25px 0}.hero h1 em{font-weight:400;color:#537a70}.lead{font-size:19px;line-height:1.6;color:var(--muted);max-width:46ch;margin:0}.hero-actions{display:flex;flex-wrap:wrap;gap:16px;align-items:center;margin-top:30px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:12px 19px;background:#173744;color:white;border-radius:7px;text-decoration:none;font-weight:700;font-size:14px}.button:hover{background:#285261}.stage{font-size:13px;color:#465e61;max-width:19ch;line-height:1.3}.hero-visual{position:relative;background:#dce6de;border-radius:18px;min-height:580px;padding:35px 28px 22px;display:flex;justify-content:center;align-items:center;flex-direction:column;overflow:hidden}.hero-visual:before{content:"";position:absolute;width:420px;height:420px;border:1px solid #c3d3c7;border-radius:50%;top:-130px;right:-135px}.art-label{position:absolute;top:20px;left:22px;font-size:10px;font-weight:800;letter-spacing:.15em;text-transform:uppercase;color:#365b57}.art-ref{position:absolute;bottom:17px;right:20px;font-size:11px;color:#3d5b5b}.prototype{position:relative;width:min(100%,300px);aspect-ratio:1878/2670;border:7px solid #1d323b;border-radius:26px;background:#10242f;box-shadow:0 26px 45px #38514b55,0 1px 0 2px #647c7c;overflow:hidden;display:grid;grid-template-rows:1fr 1fr;--deck:#ced9d4;--key:#f0f2e8;--keyink:#27404a;--pad:#b5c7c2}.prototype[data-theme="carbon"]{--deck:#1e3540;--key:#3d5660;--keyink:#edf5ee;--pad:#2f4b56}.remote-screen{position:relative;overflow:hidden;background:radial-gradient(ellipse at 70% 70%,#96bcb9 0,#457878 30%,#1b3946 72%);padding:20px 17px}.remote-screen:after{content:"";position:absolute;bottom:-55%;left:-20%;width:150%;height:85%;border-radius:50%;background:#7aa29c55;transform:rotate(-14deg)}.remote-topline{position:absolute;top:9px;left:13px;right:13px;display:flex;justify-content:space-between;font-size:6px;color:#fff;letter-spacing:.1em;font-weight:800;z-index:1}.fake-window{position:relative;margin-top:17%;background:#ecf2ea;border:1px solid #fff9;border-radius:6px;min-height:56%;box-shadow:0 8px 15px #122d3470;z-index:1;padding:13px}.fake-window:before{content:"● ● ●";position:absolute;top:3px;left:7px;color:#a3b7b2;font-size:4px}.fake-bar{width:56%;height:7px;background:#acc5bd;border-radius:4px;margin:5px 0 12px}.fake-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:6px}.fake-grid i{height:34px;background:#d0dfd2;border-radius:3px}.fake-grid i:nth-child(2){background:#9ab8ad}.fake-line{height:4px;margin-top:8px;background:#d0ddcf;border-radius:3px}.fake-line.short{width:58%}.fold{height:3px;background:#10252b;box-shadow:0 0 0 1px #7d999377;position:absolute;top:50%;left:0;right:0;z-index:3}.control-deck{background:var(--deck);padding:10px 12px 9px;display:flex;flex-direction:column;align-items:center;justify-content:space-around;color:var(--keyink);transition:background .2s}.controls-label{font-size:7px;font-weight:800;letter-spacing:.13em;opacity:.85}.keyboard{display:grid;grid-template-columns:repeat(12,1fr);gap:3px;width:100%;height:37%;margin:3px 0}.keyboard i{border-radius:2px;background:var(--key);box-shadow:0 1px 0 #0003}.keyboard i.space{grid-column:span 4}.trackpad{border:1px solid #758f8a;border-radius:5px;background:var(--pad);height:28%;width:45%}.trackpad.large{height:62%;width:75%}.controller{width:100%;height:75%;display:grid;grid-template-columns:1fr 1fr 1fr;align-items:center;gap:12px}.stick{width:47px;height:47px;margin:auto;background:var(--key);border-radius:50%;box-shadow:inset 0 0 0 8px #819b9866,0 2px 3px #0002}.dpad{font-size:29px;text-align:center;line-height:1}.face{display:grid;grid-template-columns:repeat(2,24px);gap:4px;justify-content:center}.face i{height:24px;border-radius:50%;background:var(--key);display:grid;place-items:center;font-style:normal;font-size:10px;font-weight:800}.deck-view[hidden]{display:none}.deck-view{width:100%;height:100%;display:flex;align-items:center;justify-content:space-around;flex-direction:column}
.demo-controls{display:flex;flex-wrap:wrap;gap:7px;margin-top:18px;justify-content:center}.demo-controls button{min-height:38px;border:1px solid #728f89;background:#edf3eb;color:#1d3a3d;padding:7px 10px;border-radius:6px;font-size:11px;font-weight:750;cursor:pointer}.demo-controls button[aria-pressed=true]{background:#254d49;color:#fff;border-color:#254d49}.demo-caption{font-size:11px;color:#385957;text-align:center;margin:10px 0 15px;max-width:35ch}
.band{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:23px 0}.band-inner{display:flex;justify-content:space-between;gap:24px;align-items:center}.band strong{font-size:13px;letter-spacing:.12em;text-transform:uppercase}.band span{font-size:14px;color:var(--muted);max-width:62ch}
section.content{padding:100px 0}.section-heading{display:grid;grid-template-columns:.65fr 1.35fr;gap:35px;align-items:start}.section-heading h2{font-size:clamp(43px,5vw,64px);margin:0;max-width:14ch}.section-heading p{font-size:18px;color:var(--muted);max-width:54ch;margin:0;line-height:1.65}.modes{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:55px}.mode{border-top:1px solid #a7bbb2;padding-top:18px}.num{font-size:11px;letter-spacing:.14em;font-weight:800;color:#496e65}.mode h3{font-family:Georgia,serif;font-weight:400;letter-spacing:-.03em;font-size:30px;margin:16px 0 12px}.mode p{margin:0;color:var(--muted);line-height:1.65}.mode-icon{height:84px;margin:20px 0;display:flex;align-items:end}.mini{width:75px;height:58px;border:3px solid #416c65;border-radius:7px;background:#c9ddd2;position:relative}.mini.folded:after{content:"";position:absolute;top:50%;left:0;right:0;border-top:2px solid #416c65}.mini.closed{width:40px}.mini.closed:after{content:"";position:absolute;inset:11px 8px 19px;border-radius:50%;background:#6a9587}
.connections{background:#173541;color:#eff5ee}.connections .tag{color:#bedbd3}.connections .tag:before{background:#bcdacf}.connections .section-heading p{color:#ccdad5}.connections .section-heading h2{color:#f3f4e9}.connection-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:#587279;margin-top:50px;border:1px solid #587279}.connection{padding:24px;background:#173541;min-height:136px}.connection strong{font-family:Georgia,serif;font-size:26px;font-weight:400;letter-spacing:-.03em}.connection p{color:#d4dfd9;margin:5px 0 0;font-size:14px}.connection small{display:block;margin-top:14px;color:#c5d8d0;letter-spacing:.12em;text-transform:uppercase;font-weight:750;font-size:10px}.note{font-size:14px;color:#dae6df;max-width:72ch;line-height:1.65;margin:24px 0 0}.note a{color:inherit;text-underline-offset:3px}.detail{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:start}.detail h2{font-family:Georgia,serif;letter-spacing:-.045em;font-size:clamp(38px,4.5vw,60px);font-weight:400;line-height:1.05;margin:22px 0}.detail p{font-size:17px;color:var(--muted);line-height:1.7}.detail-list{margin:0;padding:0;list-style:none}.detail-list li{padding:19px 0;border-bottom:1px solid var(--line)}.detail-list strong{display:block;font-size:16px}.detail-list span{display:block;color:var(--muted);font-size:15px;margin-top:5px}.final{background:#e0e8dd;padding:65px 0}.final-inner{display:flex;justify-content:space-between;align-items:end;gap:35px}.final h2{font-size:clamp(43px,5vw,65px);margin:14px 0}.final p{max-width:60ch;color:#405c57;margin:0;line-height:1.6}.final-side{min-width:180px}.final-side a{font-size:14px;font-weight:700}.final-side p{font-size:12px;margin-top:12px}footer{padding:28px 0 38px;font-size:13px;color:var(--muted)}.foot{display:flex;justify-content:space-between;gap:20px}.foot a{text-underline-offset:3px}
@media(max-width:800px){.wrap{width:min(100% - 36px,600px)}.nav{min-height:68px}.nav-links{display:none}.langs{margin-left:auto}.hero{padding:48px 0 45px;grid-template-columns:1fr;gap:30px}.hero h1{font-size:clamp(51px,11vw,70px)}.hero-visual{min-height:520px}.section-heading{grid-template-columns:1fr;gap:25px}.modes{grid-template-columns:1fr;gap:34px}.mode-icon{height:65px;margin:12px 0}.connection-grid{grid-template-columns:repeat(2,1fr)}.detail{grid-template-columns:1fr;gap:30px}.final-inner{align-items:start;flex-direction:column}.band-inner{align-items:start;flex-direction:column;gap:8px}section.content{padding:70px 0}}
@media(max-width:400px){.wrap{width:calc(100% - 28px)}.hero-visual{padding-inline:16px;min-height:490px}.prototype{width:min(100%,270px)}.connection-grid{grid-template-columns:1fr}.connection{min-height:0}.foot{flex-direction:column}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*{transition:none!important}}
@media(forced-colors:active){.prototype,.connection,.demo-controls button{border:2px solid CanvasText}.demo-controls button[aria-pressed=true]{outline:2px solid Highlight}.keyboard i,.stick,.face i{border:1px solid CanvasText}}
@media(prefers-color-scheme:dark){
:root{color-scheme:dark;--ink:#f0f5ee;--muted:#bdcec7;--paper:#101e23;--line:#3b5151}
.tag{color:#b4d8c9}.tag:before{background:#a3c8b8}.hero h1 em{color:#b5d7c8}.stage{color:#b8ccc5}.button{background:#cce2d7;color:#102a31}.button:hover{background:#e5f1e6}.hero-visual{background:#29423d}.hero-visual:before{border-color:#526d64}.art-label,.art-ref,.demo-caption{color:#d4e7da}.final{background:#293f3b}.final p{color:#c5d7ce}.mini{background:#b7d5c5}
}
@media(prefers-color-scheme:dark){.num{color:#b8d6c8}}
.demo-controls button[aria-pressed=true]::before,.density-controls button[aria-pressed=true]::before{content:"✓ ";font-weight:900}
.browser-story{display:grid;grid-template-columns:.85fr 1.15fr;gap:75px;align-items:center}.browser-story h2{font-family:Georgia,serif;font-weight:400;letter-spacing:-.05em;line-height:1.04;font-size:clamp(40px,4.5vw,62px);margin:20px 0}.browser-story p{font-size:17px;color:var(--muted);line-height:1.7}.browser-story .browser-caveat{font-size:14px}.browser-demo{background:#e6ede3;border:1px solid #cad9ce;border-radius:14px;padding:20px;color:#19343c;box-shadow:0 16px 40px #173c3214}.browser-chrome{display:flex;gap:15px;align-items:center;color:#315350;font-size:12px;font-weight:700;padding:3px 2px 16px}.browser-chrome span:last-child{background:#f8faf3;border-radius:6px;padding:7px 12px;flex:1}.sample-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-auto-rows:78px;gap:6px;height:162px;overflow:hidden}.sample-grid i{background:#b6d0c4;border:1px solid #a3bfb2;border-radius:7px;padding:11px;font-style:normal;font-weight:800;font-size:12px;color:#24483e}.sample-grid i:nth-child(3n+2){background:#cadbc5}.sample-grid i:nth-child(3n){background:#c7d3df}.browser-demo[data-density=compact] .sample-grid{grid-template-columns:repeat(3,minmax(0,1fr));grid-auto-rows:50px}.density-controls{display:flex;gap:7px;flex-wrap:wrap;margin-top:17px}.density-controls button{min-height:38px;padding:7px 11px;border-radius:6px;border:1px solid #728f89;background:#f5f8f1;color:#1d3a3d;font-size:12px;font-weight:750;cursor:pointer}.density-controls button[aria-pressed=true]{background:#254d49;color:#fff;border-color:#254d49}.density-message{display:block;margin-top:10px;font-size:12px;color:#315350}
@media(max-width:800px){.browser-story{grid-template-columns:1fr;gap:25px}}
@media(forced-colors:active){.density-controls button{border:2px solid CanvasText}.density-controls button[aria-pressed=true]{outline:2px solid Highlight}}
/* The controls below are illustrative screen artwork, not physical keys. */
.prototype{width:min(100%,340px);--deck:#c1cece;--key:#30424d;--keyink:#eef4f3;--pad:#aebfbe;--labelink:#29434a}
.prototype[data-theme="carbon"]{--deck:#263a46;--key:#344958;--keyink:#edf5ee;--pad:#435965;--labelink:#dae9e5}
.control-deck{background:linear-gradient(145deg,color-mix(in srgb,var(--deck) 88%,white),var(--deck));padding:8px 11px 10px}
.controls-label{color:var(--labelink);font-size:7px;letter-spacing:.13em}
.trackpad{border:1px solid #768d8e;border-radius:5px;background:var(--pad);height:27%;width:45%;box-shadow:inset 0 1px 2px #fff6,0 1px #fff5}.trackpad.large{height:66%;width:77%}
.gamepad-deck{position:relative}.gamepad[hidden],.gamepad-choices[hidden]{display:none}.gamepad{position:relative;width:100%;height:100%;color:var(--keyink)}
.gp-shoulder{position:absolute;top:2%;width:21%;height:9%;border-radius:5px;background:#334957;box-shadow:inset 0 1px #ffffff40,0 2px 2px #0004;display:grid;place-items:center;font-size:7px;font-weight:800}.gp-shoulder.left{left:2%}.gp-shoulder.right{right:2%}
.gp-menu{position:absolute;top:4%;left:32%;width:36%;text-align:center;color:var(--labelink);font-size:7px;font-weight:800;letter-spacing:.09em}
.gp-stick{position:absolute;width:18%;aspect-ratio:1;border-radius:50%;background:radial-gradient(circle at 38% 30%,#71818a 0,#465762 42%,#263740 46%,#1a2b36 70%);box-shadow:0 2px 4px #0006,inset 0 1px 2px #ffffff50}
.gp-dpad{position:absolute;width:18%;aspect-ratio:1}.gp-dpad:before,.gp-dpad:after{content:"";position:absolute;background:linear-gradient(140deg,#536874,#263943);border-radius:3px;box-shadow:0 2px 3px #0005,inset 0 1px #ffffff40}.gp-dpad:before{left:36%;top:4%;width:28%;height:92%}.gp-dpad:after{top:36%;left:4%;height:28%;width:92%}
.gp-face{position:absolute;width:27%;aspect-ratio:1}.gp-face span{position:absolute;display:grid;place-items:center;width:29%;aspect-ratio:1;border-radius:50%;background:radial-gradient(circle at 38% 25%,#6c7d86,#293d48);color:#f2f7f4;box-shadow:0 2px 3px #0007,inset 0 1px #fff6;font-size:clamp(6px,.65vw,9px);font-weight:800;line-height:1}.gp-face .top{top:0;left:35%}.gp-face .left{top:35%;left:0}.gp-face .right{top:35%;right:0}.gp-face .bottom{bottom:0;left:35%}
.gp-touch{position:absolute;display:grid;place-items:center;background:var(--pad);border:1px solid #6f8987;border-radius:5px;color:var(--labelink);font-size:clamp(5px,.5vw,7px);font-weight:800;letter-spacing:.1em;box-shadow:inset 0 1px #fff6,0 1px #fff5}
.gp-handheld .gp-left{left:5%;width:20%;top:18%}.gp-handheld .gp-dpad{left:5%;width:20%;top:57%}.gp-handheld .gp-face{right:3%;width:22%;top:25%}.gp-handheld .gp-touch{left:50%;top:50%;width:42%;height:52%;transform:translate(-50%,-50%)}
.gp-xbox .gp-left{left:7%;top:20%}.gp-xbox .gp-dpad{left:24%;top:59%}.gp-xbox .gp-right{right:24%;top:59%}.gp-xbox .gp-face{right:3%;top:17%}
.gp-playstation .gp-dpad{left:7%;top:23%}.gp-playstation .gp-left{left:27%;top:62%}.gp-playstation .gp-right{right:27%;top:62%}.gp-playstation .gp-face{right:4%;top:20%}.gp-playstation .gp-touch{left:34%;width:32%;top:23%;height:25%}
.gamepad-choices{margin-top:8px}.gamepad-choices button{font-size:10px}
@media(max-width:400px){.prototype{width:min(100%,290px)}}
.gp-shoulder{display:flex;gap:3px;background:none;box-shadow:none}
.gp-shoulder b{flex:1;display:grid;place-items:center;border-radius:4px;background:#334957;box-shadow:inset 0 1px #ffffff40,0 2px 2px #0004;font-size:7px}
.gp-xbox .gp-face .top{color:#ffdf88}.gp-xbox .gp-face .left{color:#a7d5ff}.gp-xbox .gp-face .right{color:#ffb1a6}.gp-xbox .gp-face .bottom{color:#b9e8b1}
/* Edge-to-edge upper display and a precisely aligned ISO keyboard study. */
.prototype{border:0;border-radius:18px;box-shadow:0 26px 45px #1d37335a;overflow:hidden}
.remote-screen{padding:0}.remote-topline{top:9px;left:12px;right:12px}.fake-window{margin:19% 7% 0}
.fold{height:2px;background:#233b40;box-shadow:0 1px 2px #0004}
.keyboard-deck{justify-content:space-between;gap:5px}.control-deck .keyboard-deck{width:calc(100% + 16px)}
.deck-topbar{width:100%;height:21px;display:flex;justify-content:space-between;align-items:center;gap:10px;padding:0 2px}
.keyboard-indicators{display:flex;gap:9px;align-items:center;color:var(--labelink);font-size:6px;font-weight:800;letter-spacing:.09em}
.keyboard-indicators span{display:flex;align-items:center;gap:3px}.keyboard-indicators i{width:5px;height:5px;border-radius:50%;background:#879f98;box-shadow:inset 0 1px 1px #fff8,0 0 0 1px #27413c66}
.media-controls{display:flex;gap:clamp(9px,1.2vw,16px)}.media-controls span{width:21px;height:16px;display:grid;place-items:center;border-radius:5px;background:linear-gradient(#e5ece7,#a6b8b5);color:#243c42;box-shadow:0 1px 2px #0005,inset 0 1px #fff9;font-size:8px;font-weight:800;line-height:1}
.keyboard-svg{display:block;width:100%;height:auto;max-height:57%;overflow:visible;filter:drop-shadow(0 2px 2px #0004)}
.keyboard-well{fill:#17232a;stroke:#657b7a;stroke-width:2}.keycap{fill:var(--key-gradient);stroke:#111c22;stroke-width:1.5}.key-legend{fill:#eef5f2;font-family:-apple-system,BlinkMacSystemFont,Arial,sans-serif;font-size:10px;font-weight:600}.key-legend.arrow{text-anchor:middle;font-size:9px}
.pointer-unit{width:78%;height:26%;display:grid;grid-template-columns:16% minmax(0,1fr) 16%;align-items:stretch;gap:5px}
.pointer-unit .trackpad{width:100%;height:100%;min-width:0;margin:0;border-radius:5px;background:linear-gradient(145deg,color-mix(in srgb,var(--pad) 86%,white),var(--pad))}
.pointer-button{display:grid;place-items:center;border:1px solid #819996;border-radius:5px;background:linear-gradient(145deg,color-mix(in srgb,var(--pad) 73%,white),var(--pad));box-shadow:inset 0 1px #fff9,0 1px 1px #0003;color:#334f50;font-size:7px;font-weight:800}
.pointer-unit.large{width:90%;height:64%}
@media(forced-colors:active){.keyboard-well,.keycap{stroke:CanvasText}.pointer-button{border:1px solid CanvasText}}
.surface-story{display:grid;grid-template-columns:.8fr 1.2fr;gap:68px;align-items:center}.surface-story h2{font-family:Georgia,serif;font-weight:400;letter-spacing:-.05em;line-height:1.04;font-size:clamp(40px,4.5vw,62px);margin:20px 0}.surface-story p{font-size:17px;color:var(--muted);line-height:1.7}.surface-story .surface-note{font-size:13px}
.surface-closeup{--deck:#c1cece;--pad:#aebfbe;--labelink:#29434a;padding:16px 9px 18px;border-radius:15px;background:linear-gradient(145deg,#e0e9e3,var(--deck));box-shadow:0 16px 40px #173c3228}.surface-closeup[data-theme="carbon"]{--deck:#263a46;--pad:#435965;--labelink:#dae9e5;background:linear-gradient(145deg,#40555f,var(--deck))}
.surface-closeup .keyboard-deck{gap:14px}.surface-closeup .keyboard-svg{max-height:none}.surface-closeup .deck-topbar{height:28px}.surface-closeup .keyboard-indicators{font-size:9px}.surface-closeup .keyboard-indicators i{width:7px;height:7px}.surface-closeup .media-controls span{width:30px;height:23px;font-size:11px}.surface-closeup .pointer-unit{height:74px;width:65%}.surface-closeup .pointer-button{font-size:10px}
@media(max-width:800px){.surface-story{grid-template-columns:1fr;gap:25px}.surface-closeup{padding:14px 7px 16px}.surface-closeup .pointer-unit{width:80%;height:60px}}

.prototype[data-theme="carbon"] .pointer-button,.surface-closeup[data-theme="carbon"] .pointer-button{background:linear-gradient(#526674,#2c424d);color:#f1f6f3;border-color:#7b9293}