:root{
--ink:#111827;--ink-2:#6B7280;--ink-3:#979797;--white:#fff;--page:#FEFEFE;
--green:#0BA83A;--green-action:#13B601;--green-bright:#5DDF4F;--green-surface:#E5F4D9;--green-tint:#F9FFF4;
--red:#EF4444;--heart:#FF3B30;--slate:#2D3E50;--slate-deep:#1E293B;
--z1:#38BDF8;--z2:#0BA83A;--z3:#FBBF24;--z4:#F97316;--z5:#EF4444;
--hair:#F3F4F6;--border:#E6E8EB;--field:#F8F8F8;
--grad:linear-gradient(250deg,#5DDF4F 0%,#0BA83A 100%);
--r-sm:12px;--r-md:20px;--r-lg:28px;--r-xl:40px;
--shadow-sm:0 1px 2px rgba(17,24,39,.04),0 4px 16px rgba(17,24,39,.05);
--shadow-md:0 2px 6px rgba(17,24,39,.05),0 18px 44px rgba(17,24,39,.09);
--shadow-green:0 14px 34px rgba(11,168,58,.28);
--wrap:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--page);color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;font-size:17px;line-height:1.55;-webkit-font-smoothing:antialiased;text-wrap:pretty}
img{max-width:100%;height:auto;display:block}
a{color:var(--green);text-decoration:none}
a:hover{color:var(--green-action)}
h1,h2,h3,h4{margin:0;letter-spacing:-.025em;line-height:1.1;font-weight:700}
p{margin:0}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 clamp(18px,4vw,24px)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--green);background:var(--green-tint);border:1px solid #DDF0CE;padding:7px 14px;border-radius:999px}
section{padding:clamp(56px,7vw,104px) 0}
.sec-head{max-width:720px;display:flex;flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:clamp(32px,4vw,52px)}
.sec-head h2{font-size:clamp(30px,4vw,46px);font-weight:800}
.sec-head p{color:var(--ink-2);font-size:clamp(16px,1.6vw,19px)}
header{position:sticky;top:0;z-index:60;background:rgba(254,254,254,.82);backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid transparent;transition:border-color .2s,box-shadow .2s}
header.stuck{border-color:var(--hair);box-shadow:0 6px 24px rgba(17,24,39,.05)}
.nav{display:flex;align-items:center;gap:28px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:-.02em;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand img{width:32px;height:32px;border-radius:9px;object-fit:contain}
.nav-links{display:flex;gap:26px;margin-left:auto;font-size:15px;font-weight:500}
.nav-links a{color:var(--ink-2)}
.nav-links a:hover{color:var(--ink)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:600;font-size:16px;border-radius:999px;padding:13px 24px;transition:transform .15s,box-shadow .2s,background .2s;white-space:nowrap}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--green-action);color:#fff;box-shadow:var(--shadow-green)}
.btn-primary:hover{color:#fff;background:#0FA300}
.btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--border);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{color:var(--ink);border-color:#CBD5D8}
.nav .btn{padding:10px 20px;font-size:15px}
.hero{padding-top:clamp(40px,5vw,72px);padding-bottom:clamp(48px,6vw,88px);position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-40% 40% 30% -20%;background:radial-gradient(60% 60% at 50% 50%,rgba(93,223,79,.20),transparent 70%);pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,4vw,64px);align-items:center;position:relative}
.hero h1{font-size:clamp(38px,5.6vw,68px);font-weight:800;letter-spacing:-.035em;line-height:1.03}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lede{font-size:clamp(17px,1.9vw,21px);color:var(--ink-2);max-width:37ch;margin-top:20px}
.hero-col{display:flex;flex-direction:column;align-items:flex-start;gap:0}
.stores{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.store{display:flex;align-items:center;gap:12px;background:var(--ink);color:#fff;border-radius:14px;padding:11px 20px 11px 18px;transition:transform .15s,box-shadow .2s}
.store:hover{color:#fff;transform:translateY(-2px);box-shadow:0 14px 28px rgba(17,24,39,.22)}
.store svg{flex:none}
.store span{display:block;font-size:11px;line-height:1.25;opacity:.72;letter-spacing:.02em;white-space:nowrap}
.store strong{display:block;font-size:17px;font-weight:600;line-height:1.2;letter-spacing:-.01em;white-space:nowrap}
.hero-meta{display:flex;flex-wrap:wrap;gap:8px 22px;margin-top:22px;font-size:14px;color:var(--ink-2)}
.hero-meta b{color:var(--ink);font-weight:600}
.phone{position:relative;width:min(300px,78vw);margin:0 auto;border-radius:44px;background:#fff;padding:9px;box-shadow:var(--shadow-md),0 0 0 1px rgba(17,24,39,.06)}
.phone-screen{border-radius:36px;overflow:hidden;background:#fff;aspect-ratio:1143/2520}
.phone-screen img{width:100%;height:auto}
.hero-phone{position:relative;width:min(300px,78vw);margin:0 auto}
.float-card{position:absolute;background:#fff;border-radius:18px;box-shadow:var(--shadow-md);padding:12px 16px;display:flex;align-items:center;gap:12px;font-size:14px;animation:float 6s ease-in-out infinite}
.float-a{top:12%;right:-6%}
.float-b{bottom:16%;left:-10%;animation-delay:-3s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--green-surface);color:var(--green);display:grid;place-items:center;font-weight:700;font-size:13px;flex:none}
.float-card b{display:block;font-weight:600;font-size:14px;line-height:1.25}
.float-card small{color:var(--ink-2);font-size:12px}
.bpm{display:flex;align-items:baseline;gap:4px;font-weight:800;font-size:22px;letter-spacing:-.02em}
.bpm i{font-style:normal;font-size:12px;font-weight:600;color:var(--ink-2)}
.heartbeat{width:26px;height:26px;color:var(--heart);animation:beat 1.1s ease-in-out infinite}
@keyframes beat{0%,100%{transform:scale(1)}14%{transform:scale(1.18)}28%{transform:scale(1)}42%{transform:scale(1.12)}}
.livedot{width:8px;height:8px;border-radius:50%;background:var(--green-action);box-shadow:0 0 0 0 rgba(19,182,1,.5);animation:ping 1.8s ease-out infinite;flex:none}
@keyframes ping{0%{box-shadow:0 0 0 0 rgba(19,182,1,.5)}70%{box-shadow:0 0 0 10px rgba(19,182,1,0)}100%{box-shadow:0 0 0 0 rgba(19,182,1,0)}}
.answers{background:var(--green-tint);border-top:1px solid #E9F5DE;border-bottom:1px solid #E9F5DE}
.answer-lede{font-size:clamp(19px,2.2vw,26px);font-weight:600;letter-spacing:-.02em;max-width:52ch;line-height:1.35}
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:34px}
.fact{background:#fff;border:1px solid #E6F0DC;border-radius:var(--r-md);padding:20px}
.fact dt{font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}
.fact dd{margin:8px 0 0;font-size:16px;font-weight:600;letter-spacing:-.01em}
.fact dd span{display:block;font-weight:400;font-size:14px;color:var(--ink-2);margin-top:2px}
.bento{display:grid;grid-template-columns:repeat(3,1fr);grid-auto-rows:1fr;gap:16px}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);padding:28px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:12px;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.card h3{font-size:21px;font-weight:700}
.card p{color:var(--ink-2);font-size:16px}
.card-wide,.card-third{grid-column:span 1}
.icon{width:46px;height:46px;border-radius:14px;background:var(--green-surface);color:var(--green);display:grid;place-items:center}
.zones{display:flex;gap:6px;margin-top:auto;padding-top:6px}
.zone{flex:1 1 0;min-width:max-content;display:flex;flex-direction:column;gap:6px;font-size:11px;letter-spacing:-.01em;color:var(--ink-3);text-align:center}
.zone span{height:8px;border-radius:99px}
.dark{background:var(--slate);color:#fff}
.dark .sec-head p{color:rgba(255,255,255,.62)}
.dark .eyebrow{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.14);color:var(--green-bright)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:var(--r-lg);padding:28px;display:flex;flex-direction:column;gap:12px}
.step-n{width:38px;height:38px;border-radius:12px;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:700;font-size:16px}
.step h3{font-size:20px}
.step p{color:rgba(255,255,255,.66);font-size:16px}
.device-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px}
.device{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--border);border-radius:var(--r-md);padding:16px 18px;font-weight:500;font-size:16px}
.device .icon{width:38px;height:38px;border-radius:11px}
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(16px,2.4vw,30px);align-items:start}
.gallery .phone{width:100%}
.shot{margin:0;display:flex;flex-direction:column;gap:14px}
.shot figcaption{font-size:15px;color:var(--ink-2);text-align:center}
.shot figcaption b{display:block;color:var(--ink);font-weight:600;font-size:16px}
.faq{display:grid;grid-template-columns:1fr;gap:14px;max-width:860px}
.qa{border:1px solid var(--border);border-radius:var(--r-md);background:#fff;padding:22px 24px}
.qa h3{font-size:18px;font-weight:600;letter-spacing:-.015em;margin-bottom:8px}
.qa p{color:var(--ink-2);font-size:16px}
.qa p+p{margin-top:8px}
/* FAQ: expanded on desktop, collapsible under 980px (see the sync script in index.html) */
details.qa>summary{display:flex;align-items:flex-start;gap:12px;list-style:none;cursor:pointer}
details.qa>summary::-webkit-details-marker{display:none}
details.qa>summary h3{margin-bottom:0;flex:1}
details.qa[open]>summary h3{margin-bottom:8px}
details.qa>summary .chev{display:block;flex:none;width:20px;height:20px;margin-top:2px;color:var(--ink-3);transition:transform .2s}
details.qa[open]>summary .chev{transform:rotate(180deg)}
.cta-box{background:var(--grad);border-radius:var(--r-xl);padding:clamp(36px,5vw,64px);color:#fff;display:grid;grid-template-columns:1.2fr .8fr;gap:32px;align-items:center;box-shadow:var(--shadow-green)}
.cta-box h2{font-size:clamp(28px,3.6vw,44px);font-weight:800}
.cta-box p{color:rgba(255,255,255,.88);margin-top:14px;font-size:18px;max-width:40ch}
.cta-box .store{background:#fff;color:var(--ink)}
.cta-box .store:hover{color:var(--ink)}
.cta-box .store span{opacity:.6}
.cta-side{display:flex;flex-direction:column;gap:12px;justify-self:end;width:100%;max-width:330px}
.cta-stat{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);border-radius:var(--r-md);padding:16px 20px}
.cta-stat b{display:block;font-size:24px;font-weight:700;letter-spacing:-.02em}
.cta-stat span{font-size:14px;color:rgba(255,255,255,.82)}
footer{background:#fff;border-top:1px solid var(--hair);padding:56px 0 40px;font-size:15px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.foot-grid h4{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);font-weight:600;margin-bottom:14px}
.foot-links{display:flex;flex-direction:column;gap:10px}
.foot-links a{color:var(--ink-2)}
.foot-links a:hover{color:var(--ink)}
.foot-bottom{display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;align-items:center;margin-top:44px;padding-top:24px;border-top:1px solid var(--hair);color:var(--ink-3);font-size:14px}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s cubic-bezier(.22,1,.36,1)}
.reveal.in{opacity:1;transform:none}
/* ── document / guide pages ─────────────────────────── */
.page-head{padding:clamp(40px,5vw,72px) 0 clamp(24px,3vw,40px);background:var(--green-tint);border-bottom:1px solid #E9F5DE}
.page-head h1{font-size:clamp(32px,4.6vw,54px);font-weight:800;letter-spacing:-.035em;margin-top:18px}
.page-head p{color:var(--ink-2);font-size:clamp(16px,1.7vw,19px);max-width:60ch;margin-top:16px}
.page-head .updated{font-size:14px;color:var(--ink-3);margin-top:14px}
.doc{display:grid;grid-template-columns:240px minmax(0,1fr);gap:clamp(24px,4vw,56px);align-items:start;padding-top:clamp(40px,5vw,72px);padding-bottom:clamp(40px,5vw,72px)}
.toc{position:sticky;top:92px;display:flex;flex-direction:column;gap:4px;font-size:15px}
.toc h4{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);font-weight:600;margin-bottom:10px}
.toc a{color:var(--ink-2);padding:7px 12px;border-radius:10px;transition:background .15s,color .15s}
.toc a:hover{background:var(--field);color:var(--ink)}
.prose{max-width:74ch;font-size:17px}
.prose h2{font-size:clamp(24px,2.6vw,30px);font-weight:700;margin:44px 0 14px;scroll-margin-top:96px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:19px;font-weight:600;margin:28px 0 10px}
.prose p{color:var(--ink-2);margin:0 0 14px}
.prose strong{color:var(--ink);font-weight:600}
.prose ul,.prose ol{color:var(--ink-2);margin:0 0 16px;padding-left:22px;display:flex;flex-direction:column;gap:9px}
.prose li::marker{color:var(--green)}
.callout{background:var(--field);border:1px solid var(--border);border-radius:var(--r-md);padding:20px 24px;margin:22px 0;color:var(--ink-2)}
.callout.warn{background:#FFF6F5;border-color:#FFDEDA}
.callout.warn strong{color:var(--red)}
.callout h3{margin-top:0;color:var(--ink)}
/* device guide */
.dev-tabs{display:flex;flex-wrap:wrap;gap:10px;padding-bottom:8px}
.dev-tab{display:inline-flex;align-items:center;gap:9px;border:1px solid var(--border);background:#fff;border-radius:999px;padding:11px 20px;font-weight:600;font-size:15px;color:var(--ink);box-shadow:var(--shadow-sm)}
.dev-tab:hover{color:var(--ink);border-color:var(--green);background:var(--green-tint)}
.dev-block{border-top:1px solid var(--hair);padding-top:clamp(32px,4vw,52px);margin-top:clamp(32px,4vw,52px);scroll-margin-top:92px}
.dev-block:first-of-type{border-top:0;padding-top:0;margin-top:0}
.dev-block>h2{font-size:clamp(26px,3vw,36px);font-weight:800}
.dev-sub{color:var(--ink-2);margin-top:10px;max-width:62ch}
.stepgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px;margin-top:28px}
.stepcard{margin:0;background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-sm);display:flex;flex-direction:column}
.stepcard .shotwrap{background:var(--field);border-bottom:1px solid var(--hair);display:grid;place-items:center;padding:18px}
.stepcard .shotwrap img{border-radius:14px;max-height:300px;width:auto}
.stepcard .body{padding:18px 20px;display:flex;gap:12px;align-items:flex-start}
.stepcard .n{width:26px;height:26px;border-radius:8px;background:var(--green-surface);color:var(--green);font-weight:700;font-size:13px;display:grid;place-items:center;flex:none;margin-top:1px}
.stepcard p{color:var(--ink-2);font-size:15px;margin:0}
.videobox{margin-top:24px;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow-sm);aspect-ratio:16/9;background:#000}
.videobox iframe{width:100%;height:100%;border:0;display:block}
details.qa>summary:hover h3{color:var(--green)}
@media (max-width:980px){
.hero-grid{grid-template-columns:1fr;gap:44px}
.hero-col{align-items:center;text-align:center}
.hero .lede{max-width:52ch}
.stores,.hero-meta{justify-content:center}
.facts{grid-template-columns:repeat(2,1fr)}
.bento{grid-template-columns:repeat(2,1fr)}
.steps{grid-template-columns:1fr}
.cta-box{grid-template-columns:1fr}
.cta-side{justify-self:start;max-width:none}
.foot-grid{grid-template-columns:1fr 1fr}
.nav-links{display:none}
.nav .btn{margin-left:auto}
.gallery{grid-template-columns:repeat(2,1fr);max-width:640px;margin:0 auto}
.doc{grid-template-columns:1fr}
.toc{position:static;flex-direction:row;flex-wrap:wrap;gap:8px}
.toc h4{width:100%;margin-bottom:4px}
.toc a{background:var(--field)}
}
@media (max-width:560px){.facts{grid-template-columns:1fr}.bento{grid-template-columns:1fr;grid-auto-rows:auto}.float-b{left:-4%}.float-a{right:-2%}.gallery{grid-template-columns:1fr;max-width:320px}.foot-grid{grid-template-columns:1fr;gap:28px}.nav{gap:14px}.nav .btn{padding:9px 16px}.card,.step{padding:22px}.qa{padding:18px 20px}.cta-box{padding:28px 22px}.stepcard .shotwrap img{max-height:240px}.stores{flex-wrap:nowrap;gap:10px}.store{flex:1 1 0;min-width:0;justify-content:center;gap:8px;padding:10px 12px}.store svg{width:20px;height:22px}.store strong{font-size:15px}.store span{font-size:10px}}
@media (max-width:340px){.stores{flex-wrap:wrap}.store{flex:1 1 100%}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}
/* ── specs table ────────────────────────────────────── */
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.spec-table{overflow-x:auto;border:1px solid var(--border);border-radius:var(--r-lg);background:#fff;box-shadow:var(--shadow-sm)}
.spec-table table{width:100%;border-collapse:collapse;font-size:16px;min-width:600px}
.spec-table thead th{text-align:left;font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);padding:16px 22px;border-bottom:1px solid var(--border);background:var(--green-tint)}
.spec-table tbody th{text-align:left;font-weight:600;color:var(--ink);padding:15px 22px;width:34%;vertical-align:top}
.spec-table td{color:var(--ink-2);padding:15px 22px;vertical-align:top}
.spec-table tbody tr+tr th,.spec-table tbody tr+tr td{border-top:1px solid var(--hair)}
.spec-note{margin-top:16px;font-size:14px;color:var(--ink-3)}
@media (max-width:560px){.spec-table thead th,.spec-table tbody th,.spec-table td{padding:13px 16px}.spec-table table{font-size:15px}}