/* Layout: a fixed 3D stage behind a scroll story (text left, product right), then solid sections for modules, software, specs and contact */
:root{
 --ink:#05090c; --ink-rgb:5,9,12; --panel:#0b1319; --panel-rgb:11,19,25; --line:#1b2a34; --line2:#223641; --fg:#eef4f7; --muted:#9db0bd; --sub:#c3d1da; --dim:#7f97a6; --field:#060c10; --sel-bg:#0c1b22; --hover:#0c171e; --live-bg:#070d11; --card-grad:linear-gradient(160deg,#0e1a22,#081016); --shadow-c:rgba(0,0,0,.85); --teal:#19b5ca; --teal-soft:rgba(25,181,202,.16); --amber:#e9a23b;
 --c-red:#ff5f5f; --c-green:#2fd38a; --c-dot:#e9f7fa; --track:#16242d; --grid:rgba(42,212,234,.07); --scheme:dark;
 --display:'Chakra Petch',ui-sans-serif,system-ui,sans-serif; --body:Inter,ui-sans-serif,system-ui,sans-serif; --mono:'JetBrains Mono',ui-monospace,monospace;
 color-scheme:var(--scheme);
}
:root[data-theme="light"]{
 --ink:#f4f6f8; --ink-rgb:244,246,248; --panel:#ffffff; --panel-rgb:255,255,255; --line:#dbe2e8; --line2:#c9d3db; --fg:#0b1e2d; --muted:#4e6272; --sub:#2c3e4b; --dim:#6b7f8c; --field:#ffffff; --sel-bg:#e6f5f8; --hover:#eef3f6; --live-bg:#0b1e2d; --card-grad:linear-gradient(160deg,#ffffff,#f1f5f8); --shadow-c:rgba(11,30,45,.18); --teal:#0e9fb4; --teal-soft:rgba(14,159,180,.14);
 --c-red:#e0443f; --c-green:#1a9f66; --c-dot:#ffffff; --track:#e3e9ee; --grid:rgba(14,159,180,.08); --scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--ink);color:var(--fg);font-family:var(--body);font-size:17px;line-height:1.55;overflow-x:hidden}
a{color:inherit}
:focus-visible{outline:2px solid var(--teal);outline-offset:3px}
#stage{position:fixed;inset:0;z-index:0;transition:opacity .4s}
#stage canvas{display:block;width:100%;height:100%}
.wrap{position:relative;z-index:1;padding-inline:clamp(16px,5vw,72px)}
/* nav */
.nav{position:fixed;top:env(safe-area-inset-top,0px);left:0;right:0;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px clamp(16px,5vw,72px);background:linear-gradient(180deg,rgba(var(--ink-rgb),.85),rgba(var(--ink-rgb),0))}
.nav img{height:22px;display:block}
.nav ul{display:flex;gap:28px;list-style:none;margin:0;padding:0;font-size:14px;color:var(--muted)}
.nav ul a{text-decoration:none}.nav ul a:hover{color:var(--fg)}
.btn{display:inline-flex;align-items:center;gap:10px;padding:13px 22px;border-radius:10px;background:var(--teal);color:#03171c;font-weight:600;font-size:15px;text-decoration:none;border:0;cursor:pointer;font-family:var(--body);box-shadow:0 0 30px rgba(25,181,202,.3);transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-1px);box-shadow:0 0 44px rgba(25,181,202,.5)}
.btn.ghost{background:transparent;color:var(--fg);border:1px solid var(--line);box-shadow:none}
/* story */
.step{min-height:100vh;display:flex;align-items:center;padding-block:120px}
.copy{max-width:600px;min-width:0}
.kick{font-family:var(--mono);font-size:13px;letter-spacing:.28em;text-transform:uppercase;color:var(--teal);display:flex;align-items:center;gap:12px}
.kick::before{content:"";width:30px;height:1px;background:var(--teal)}
h1,h2{font-family:var(--display);font-weight:500;letter-spacing:-.005em;line-height:1.02;margin:18px 0 0;text-wrap:balance}
h1{font-size:clamp(42px,5.6vw,84px)}
h2{font-size:clamp(34px,4.4vw,64px)}
h1 em,h2 em{font-style:normal;color:var(--teal)}
.lead{font-size:clamp(17px,1.5vw,21px);color:var(--muted);margin:22px 0 0;max-width:46ch;font-weight:300}
.dots{list-style:none;padding:0;margin:26px 0 0;display:grid;gap:12px}
.dots li{display:flex;gap:14px;align-items:baseline;color:var(--sub)}
.dots li::before{content:"";flex:none;width:8px;height:8px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 5px var(--teal-soft),0 0 14px var(--teal);transform:translateY(-2px)}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.hint{font-family:var(--mono);font-size:12px;letter-spacing:.18em;color:var(--dim);margin-top:44px;text-transform:uppercase;display:flex;gap:10px;align-items:center}
.hint span{display:inline-block;width:18px;height:28px;border:1px solid var(--line2);border-radius:10px;position:relative}
.hint span::after{content:"";position:absolute;left:50%;top:6px;width:2px;height:6px;margin-left:-1px;background:var(--teal);border-radius:2px;animation:wheel 1.6s infinite}
@keyframes wheel{0%{opacity:0;transform:translateY(0)}40%{opacity:1}100%{opacity:0;transform:translateY(8px)}}
.spec-strip{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.spec-strip span{font-family:var(--mono);font-size:12.5px;padding:8px 12px;border:1px solid var(--line);border-radius:999px;color:var(--sub);background:rgba(var(--panel-rgb),.6);backdrop-filter:blur(6px)}
.progress{position:fixed;right:clamp(12px,2.4vw,36px);top:50%;transform:translateY(-50%);z-index:4;display:grid;gap:12px}
.progress i{width:6px;height:6px;border-radius:50%;background:var(--line2);transition:background .3s,transform .3s}
.progress i.on{background:var(--teal);transform:scale(1.6);box-shadow:0 0 10px var(--teal)}
/* solid sections */
.solid{position:relative;z-index:2;background:var(--ink)}
.solid::before{content:"";position:absolute;left:0;right:0;top:-180px;height:180px;background:linear-gradient(180deg,rgba(var(--ink-rgb),0),var(--ink));pointer-events:none}
.sec{padding-block:clamp(80px,10vw,140px)}
.sec-head{max-width:720px}
.mods{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-top:48px;perspective:1000px}
.mod{position:relative;padding:26px 22px 24px;border:1px solid var(--line);border-radius:16px;background:var(--card-grad);transform-style:preserve-3d;transition:transform .25s ease,border-color .25s;min-width:0}
.mod:hover{border-color:rgba(25,181,202,.55)}
.mod svg{width:44px;height:44px;color:var(--teal);transform:translateZ(30px)}
.mod h3{font-family:var(--display);font-weight:500;font-size:26px;margin:18px 0 6px;transform:translateZ(22px)}
.mod p{margin:0;color:var(--muted);font-size:15px;transform:translateZ(14px)}
.mod .tag{position:absolute;top:18px;right:18px;font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:#1a1204;background:var(--amber);padding:3px 7px;border-radius:5px}
.mod .metric{font-family:var(--mono);font-size:12px;color:var(--dim);margin-top:16px;display:flex;flex-wrap:wrap;gap:6px}
.mod .metric b{font-weight:400;border:1px solid var(--line);border-radius:6px;padding:3px 7px}
/* carousel */
.soft{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);gap:clamp(24px,5vw,80px);align-items:center}
.ring-wrap{position:relative;height:clamp(260px,34vw,460px);perspective:1600px}
.ring{position:absolute;inset:0;transform-style:preserve-3d}
.ring figure{position:absolute;left:50%;top:50%;width:min(78%,560px);aspect-ratio:16/9;margin:0;border-radius:12px;overflow:hidden;border:1px solid var(--line2);box-shadow:0 30px 60px -20px var(--shadow-c);backface-visibility:hidden;background:#0b1319}
.ring figure img{width:100%;height:100%;object-fit:cover;display:block}
.ring figcaption{position:absolute;left:12px;bottom:10px;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;background:rgba(var(--ink-rgb),.78);padding:5px 9px;border-radius:6px;color:var(--sub)}
.feat{list-style:none;padding:0;margin:32px 0 0;display:grid;gap:4px}
.feat li{display:grid;grid-template-columns:auto minmax(0,1fr);gap:16px;padding:14px 12px;border-radius:12px;cursor:pointer;transition:background .2s}
.feat li:hover,.feat li.on{background:var(--hover)}
.feat li.on b{color:var(--teal)}
.feat b{font-family:var(--display);font-weight:500;font-size:20px;display:block}
.feat span{color:var(--muted);font-size:15px}
.feat .ic{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);display:grid;place-items:center;color:var(--teal)}
/* process */
.proc{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin-top:48px;counter-reset:p}
.proc div{padding:28px;border-top:1px solid var(--line);position:relative;min-width:0}
.proc div::before{counter-increment:p;content:"0" counter(p);font-family:var(--mono);color:var(--teal);font-size:13px;letter-spacing:.2em}
.proc h3{font-family:var(--display);font-weight:500;font-size:28px;margin:12px 0 8px}
.proc p{color:var(--muted);margin:0}
.proc div::after{content:"";position:absolute;left:0;top:-1px;height:1px;width:0;background:var(--teal);box-shadow:0 0 10px var(--teal);transition:width 1.2s ease}
.proc.in div::after{width:100%}
.proc.in div:nth-child(2)::after{transition-delay:.3s}.proc.in div:nth-child(3)::after{transition-delay:.6s}
/* specs */
.specs{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:16px;overflow:hidden;margin-top:48px}
.specs div{background:var(--panel);padding:26px 24px;min-width:0}
.specs dt{font-family:var(--mono);font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--dim)}
.specs dd{margin:10px 0 0;font-family:var(--display);font-size:24px;line-height:1.2}
.specs small{display:block;font-family:var(--body);font-size:14px;color:var(--muted);margin-top:6px}
/* contact */
.contact{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(24px,5vw,80px);align-items:start}
form{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding:28px;border:1px solid var(--line);border-radius:18px;background:var(--card-grad)}
label{display:grid;gap:6px;font-size:13px;color:var(--muted);min-width:0}
label.full{grid-column:1/-1}
input,select,textarea{font:inherit;font-size:15px;color:var(--fg);background:var(--field);border:1px solid var(--line);border-radius:10px;padding:12px 13px;width:100%}
input:focus,select:focus,textarea:focus{border-color:var(--teal);outline:none;box-shadow:0 0 0 3px var(--teal-soft)}
textarea{min-height:96px;resize:vertical}
.form-foot{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between}
.form-foot small{color:var(--dim);font-size:12.5px}
.done{grid-column:1/-1;padding:18px;border-radius:12px;background:var(--teal-soft);color:var(--fg);border:1px solid rgba(25,181,202,.4)}
footer{border-top:1px solid var(--line);padding-block:40px;display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center;color:var(--dim);font-size:14px}
footer img{height:20px}
@media (max-width:860px){
 .nav ul{display:none}
 .step{align-items:flex-end;padding-block:90px 60px}
 .copy{background:linear-gradient(180deg,rgba(var(--ink-rgb),0),rgba(var(--ink-rgb),.9) 18%);padding-top:48px}
 .soft,.contact{grid-template-columns:1fr}
 form{grid-template-columns:1fr}
 .progress{display:none}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
.sec-lead{color:var(--muted);max-width:560px;margin:16px 0 0}
.pillars{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin-top:48px}
.pillars div{padding:24px;border:1px solid var(--line);border-radius:16px;background:linear-gradient(160deg,rgba(25,181,202,.07),rgba(8,16,22,.6));min-width:0}
.pillars b{font-family:var(--display);font-weight:500;font-size:22px;display:flex;align-items:center;gap:10px;margin-bottom:8px}
@media(min-width:900px){.pillars{grid-template-columns:repeat(3,1fr)}}
.pillars b::before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--teal);box-shadow:0 0 10px var(--teal);flex:none}
.pillars p{margin:0;color:var(--muted);font-size:15px}
.mod{cursor:pointer;outline:none}
.mod:focus-visible{border-color:var(--teal)}
.mod .pick{position:absolute;top:18px;right:18px;width:22px;height:22px;border:1px solid var(--line);border-radius:6px;transition:.2s}
.mod.sel{border-color:var(--teal);box-shadow:0 0 0 1px var(--teal),0 18px 50px -20px rgba(25,181,202,.6)}
.mod.sel .pick{background:var(--teal);border-color:var(--teal)}
.mod.sel .pick::after{content:"";position:absolute;left:7px;top:3px;width:5px;height:10px;border:solid #04161a;border-width:0 2px 2px 0;transform:rotate(45deg)}
.plan{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;margin-top:22px;padding:16px 20px;border:1px solid var(--line);border-radius:14px;background:rgba(var(--panel-rgb),.6)}
.plan span{font-family:var(--mono);font-size:13px;color:var(--sub)}
.plan div{display:flex;gap:10px;flex-wrap:wrap}
.chips{grid-column:1/-1;min-width:0;border:0;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px}
.chips legend{padding:0;margin-bottom:8px;font-size:13px;color:var(--muted)}
.chips label{display:inline-flex;align-items:center;gap:6px;padding:7px 12px;border:1px solid var(--line);border-radius:999px;cursor:pointer;font-size:14px}
.chips label:has(input:checked){border-color:var(--teal);color:var(--fg);background:rgba(25,181,202,.14)}
.chips input{accent-color:var(--teal);margin:0;width:auto;padding:0}

/* v3: benefit-led structure */
.solid.top{z-index:2}
.solid.top::after{content:"";position:absolute;left:0;right:0;bottom:-160px;height:160px;background:linear-gradient(180deg,var(--ink),rgba(var(--ink-rgb),0));pointer-events:none;z-index:1}
.hero-step .copy{max-width:640px}
.hero-step h1{font-size:clamp(34px,4.1vw,62px)}
.hero-step h1 em{display:block;font-size:.62em;margin-top:14px;line-height:1.15}
.problem-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:clamp(24px,5vw,64px);align-items:center;margin-top:48px}
.problem-grid .pain{grid-template-columns:1fr;margin-top:0}
.problem-grid .bridge{margin-top:28px}
.btn.big{padding:16px 28px;font-size:16px}
.live{position:relative;aspect-ratio:16/10;border-radius:18px;overflow:hidden;border:1px solid var(--line2);background:var(--live-bg);box-shadow:0 40px 90px -30px var(--shadow-c),0 0 0 1px rgba(25,181,202,.08),0 0 60px -10px rgba(25,181,202,.25)}
.live canvas{width:100%;height:100%;display:block}
.live-tag{position:absolute;left:14px;top:12px;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--sub);background:rgba(var(--ink-rgb),.7);padding:6px 10px;border-radius:6px;display:flex;gap:8px;align-items:center}
.live-tag i{width:7px;height:7px;border-radius:50%;background:#ff5a5a;box-shadow:0 0 8px #ff5a5a;animation:blink 1.4s infinite}
@keyframes blink{50%{opacity:.25}}
.problem .sec-head{max-width:820px}
.pain{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin-top:48px}
.pain div{padding:26px 24px;border:1px solid var(--line);border-radius:16px;background:var(--panel);min-width:0}
.pain b{font-family:var(--display);font-weight:500;font-size:22px;display:block;margin-bottom:8px}
.pain p{margin:0;color:var(--muted);font-size:15px}
.bridge{margin:40px 0 0;font-size:clamp(19px,1.8vw,26px);font-family:var(--display);font-weight:500;line-height:1.3;max-width:760px;color:var(--sub)}
.bridge::before{content:"";display:block;width:60px;height:2px;background:var(--teal);margin-bottom:18px}
.story{position:relative;z-index:1}
.who{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px;margin-top:48px}
.who article{padding:26px 24px 22px;border-top:1px solid var(--line);min-width:0}
.who .n{font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:var(--teal)}
.who h3{font-family:var(--display);font-weight:500;font-size:24px;margin:12px 0 8px}
.who p{margin:0;color:var(--muted);font-size:15px}
.who small{display:block;margin-top:14px;font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;color:var(--dim);text-transform:uppercase}
.backed{margin-top:28px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:6px 14px;align-items:baseline}
.backed span{font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--dim)}
.backed b{font-family:var(--display);font-weight:500;font-size:19px}
.cmp{margin-top:48px;border:1px solid var(--line);border-radius:16px;overflow:hidden;font-size:15px}
.cmp [role=row]{display:grid;grid-template-columns:minmax(110px,.7fr) minmax(0,1fr) minmax(0,1fr);gap:1px;background:var(--line)}
.cmp [role=row]>span{background:var(--panel);padding:16px 18px;min-width:0;color:var(--muted)}
.cmp [role=row]>span:first-child{font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);display:flex;align-items:center}
.cmp .us{color:var(--fg);background:var(--sel-bg);font-weight:500}
.cmp-h>span{font-family:var(--display);font-size:18px;color:var(--fg)!important}
.cmp-h .us{color:var(--teal)!important}
.honest{margin:26px 0 0;color:var(--muted);font-size:15px;max-width:720px;padding-left:16px;border-left:2px solid var(--teal)}
@media (max-width:860px){
 .problem-grid{grid-template-columns:1fr}
 .live{aspect-ratio:4/5}
 .hero-step h1{font-size:clamp(30px,8.4vw,44px)}
 .hero-step .hint{display:none}
 .cmp [role=row]{grid-template-columns:minmax(90px,.8fr) 1fr 1fr}
 .cmp [role=row]>span{padding:12px 10px;font-size:13.5px}
 .cmp-h>span{font-size:15px}
 .copy{background:none;padding-top:0}
 .step{align-items:center;padding-block:90px 60px}
 .step .copy{background:linear-gradient(180deg,rgba(var(--ink-rgb),0),rgba(var(--ink-rgb),.9) 18%);padding-top:48px;align-self:flex-end}
}

/* theme toggle */
.theme{width:40px;height:40px;border-radius:50%;border:1px solid var(--line2);background:rgba(var(--panel-rgb),.7);color:var(--fg);display:grid;place-items:center;cursor:pointer;flex:none;backdrop-filter:blur(6px)}
.theme svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.theme .sun{display:none}
:root[data-theme="light"] .theme .sun{display:block}
:root[data-theme="light"] .theme .moon{display:none}
.nav-r{display:flex;gap:10px;align-items:center}
:root[data-theme="light"] .btn{color:#fff;box-shadow:0 8px 24px -8px rgba(14,159,180,.6)}
:root[data-theme="light"] .btn.ghost{color:var(--fg)}
:root[data-theme="light"] .live-tag{color:#e6f1f5;background:rgba(11,30,45,.75)}
:root[data-theme="light"] .mod.sel{box-shadow:0 0 0 1px var(--teal),0 18px 40px -22px rgba(14,159,180,.5)}
:root[data-theme="light"] .mod h3,:root[data-theme="light"] .pain b{color:var(--fg)}
:root[data-theme="light"] .dots li{color:var(--sub)}