:root{--bg:#fff;--bg2:#F2F4F6;--ink:#1A2228;--ink2:#5B6470;--line:#D9DEE3;--dark:#101820;--amber:#C9A227;--amberink:#7A6100}
@media (prefers-color-scheme:dark){:root{--bg:#101820;--bg2:#17212B;--ink:#F2F4F6;--ink2:#A7B0BA;--line:#2A3540;--dark:#0A1016;--amberink:#E3C560;color-scheme:dark}}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 'IBM Plex Sans',system-ui,-apple-system,'Segoe UI',Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit}
.w{width:100%;max-width:1120px;margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
.top{background:#000;color:#fff;padding-block:14px}
.top .w{display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none}
.brand .iso{height:32px;width:auto}.brand .word{height:15px;width:auto}
.top nav{display:flex;align-items:center;gap:20px;font-size:.92rem}
.top nav a{text-decoration:none;color:#fff}
.top nav .cta{background:var(--amber);color:#101820;font-weight:600;padding:10px 16px;border-radius:8px}
@media (max-width:640px){.top nav a:not(.cta){display:none}}
main{padding-block:clamp(28px,5vw,56px) clamp(56px,8vw,96px)}
.crumb{font-size:.82rem;color:var(--ink2);margin-bottom:22px}.crumb a{color:var(--ink2)}
.art{max-width:760px}
h1,h2{font-family:'Big Shoulders Display','Arial Narrow',Impact,sans-serif;font-weight:800;line-height:1.05;text-wrap:balance}
h1{font-size:clamp(2.3rem,6vw,3.6rem);margin:0 0 22px}
h2{font-size:clamp(1.7rem,3.6vw,2.3rem);margin:44px 0 10px}
h3{font-size:1.08rem;margin:26px 0 4px}
p{margin:0 0 1em}
.answer{font-size:1.18rem;line-height:1.55;padding:20px 22px;background:var(--bg2);border-left:4px solid var(--amber);border-radius:0 10px 10px 0;margin-bottom:8px}
.tag{display:inline-block;font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;font-weight:600;color:var(--amberink);background:var(--bg2);padding:6px 12px;border-radius:4px;margin-bottom:16px}
.box{margin:44px 0 8px;background:var(--dark);color:#fff;border-radius:14px;padding:26px 26px 28px}
.box h2{margin:0 0 6px;font-size:1.8rem}.box p{color:#C9CED3;margin-bottom:18px}
.btn{display:inline-block;font-weight:600;text-decoration:none;padding:14px 22px;border-radius:8px;background:var(--amber);color:#101820;margin-right:10px;margin-bottom:8px}
.btn.o{background:transparent;color:#fff;border:1.5px solid #fff}
.rel{list-style:none;padding:0;margin:14px 0 0;display:grid;gap:10px}
.rel a{display:block;padding:14px 16px;border:1.5px solid var(--line);border-radius:10px;text-decoration:none;font-weight:600}
.rel a:hover{border-color:var(--amber)}
.hub{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;list-style:none;padding:0;margin:18px 0 0}
@media (max-width:720px){.hub{grid-template-columns:1fr}}
.hub a{display:flex;flex-direction:column;gap:8px;height:100%;padding:20px;border:1.5px solid var(--line);border-radius:12px;text-decoration:none}
.hub a:hover{border-color:var(--amber)}
.hub b{font-family:'Big Shoulders Display','Arial Narrow',Impact,sans-serif;font-weight:800;font-size:1.45rem;line-height:1.1}
.hub span{color:var(--ink2);font-size:.92rem}
footer{background:#000;color:#C9CED3;font-size:.8rem;padding-block:24px}
footer .w{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}footer a{color:#fff}
.float{position:fixed;right:max(16px,env(safe-area-inset-right,0px));bottom:max(16px,env(safe-area-inset-bottom,0px));background:#25D366;color:#fff;font-weight:600;text-decoration:none;padding:14px 20px;border-radius:999px;box-shadow:0 6px 20px rgba(0,0,0,.25);z-index:20}
:focus-visible{outline:3px solid var(--amber);outline-offset:3px}

.hero-app{max-width:760px}
.arm{position:relative;height:420vh;height:420svh;margin:34px 0 0}
.stick{position:sticky;top:0;height:100vh;height:100svh;display:flex;align-items:center;padding-block:12px}
.p3d{width:100%;max-width:980px;margin-inline:auto;background:#0E151C;border-radius:16px;overflow:hidden;color:#fff;display:flex;flex-direction:column;max-height:calc(100vh - 24px);max-height:calc(100svh - 24px)}
.p3d .hd{display:flex;justify-content:space-between;gap:12px;padding:12px 18px 0;font-size:.74rem;letter-spacing:.18em;text-transform:uppercase;color:#9AA6B2;font-weight:600}
.p3d .hd b{color:#E3C560;font-weight:600}
.p3d svg{width:100%;flex:1 1 auto;min-height:0;height:min(62vh,560px);height:min(62svh,560px);display:block}
.cap{padding:12px 18px 16px;min-height:96px}
.cap-t{font-family:'Big Shoulders Display','Arial Narrow',Impact,sans-serif;font-weight:800;font-size:1.5rem;line-height:1.1;color:#E3C560}
.cap-p{color:#D5DAE0;font-size:.98rem;line-height:1.45;margin:4px 0 0}
.bar{height:3px;background:#243140}.bar i{display:block;height:100%;background:#C9A227;width:0}
.p3d .grid{stroke:#243240;stroke-width:1;fill:none}
.p3d .pt{stroke:rgba(10,15,20,.6);stroke-width:1;stroke-linejoin:round}
.p3d .pt.sheet{stroke:#A9B9C7}
.p3d .pt.nb{stroke:none}
.p3d .cutl{fill:none;stroke:#E3C560;stroke-width:2.2;stroke-dasharray:7 5}
.p3d .spk{stroke:#FFD36B;stroke-width:1.8;stroke-linecap:round}
.p3d .dim line{stroke:#E3C560;stroke-width:1.6;stroke-dasharray:5 4}
.p3d .dim circle{fill:#E3C560}
.p3d .dim text{fill:#E3C560;font:600 22px 'IBM Plex Sans',system-ui,sans-serif;paint-order:stroke;stroke:#0E151C;stroke-width:5px}
.scrollhint{text-align:center;font-size:.85rem;color:var(--ink2);margin:26px 0 0}
.apps{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;list-style:none;padding:0;margin:18px 0 0}
@media (max-width:720px){.apps{grid-template-columns:1fr}.arm{height:480vh;height:480svh}.p3d svg{height:min(46vh,420px);height:min(46svh,420px)}.cap{min-height:104px}}
.apps a{display:flex;flex-direction:column;gap:8px;height:100%;padding:20px;border:1.5px solid var(--line);border-radius:12px;text-decoration:none}
.apps a:hover{border-color:var(--amber)}
.apps b{font-family:'Big Shoulders Display','Arial Narrow',Impact,sans-serif;font-weight:800;font-size:1.45rem;line-height:1.1}
.apps span{color:var(--ink2);font-size:.92rem}
.apps em{font-style:normal;font-weight:600;color:var(--amberink);font-size:.88rem}