@font-face{font-family:"Space Grotesk";src:url(fonts/space-grotesk-regular.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Space Grotesk";src:url(fonts/space-grotesk-medium.woff2) format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"Space Grotesk";src:url(fonts/space-grotesk-bold.woff2) format("woff2");font-weight:700;font-display:swap}

/* Layout: dark erg-console page; hero = live arc pacer + phone, then alternating feature bands, Free/Pro table, FAQ. */
:root{
  --bg:#121316; --bg-2:#1A1B1E; --hero-top:#2E3034;
  --surface:#1E2022; --surface-2:#282A2D; --line:#42474E;
  --fg:#E2E2E6; --muted:#B8BDC5;
  --volt:#B5E52D; --volt-ink:#B5E52D; --on-volt:#15190A;
  --zone:#3DDC84; --hard:#FF6B5C; --easy:#5CA8FF; --watts:#B79CFF;
  --track:#34373B;
  --font:"Space Grotesk",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --r:20px; --max:1120px;
  color-scheme:dark;
}
@media (prefers-color-scheme:light){:root:not([data-theme="dark"]){
  --bg:#F9F9FC; --bg-2:#F0F1F4; --hero-top:#E6E8EC;
  --surface:#FFFFFF; --surface-2:#EEF0F3; --line:#D3D7DD;
  --fg:#1A1C1E; --muted:#42474E;
  --volt:#BDEE36; --volt-ink:#557A00; --on-volt:#15190A;
  --zone:#1E9E57; --hard:#D9483A; --easy:#2F7FD6; --watts:#7A5BD6;
  --track:#D9DCE1; color-scheme:light}}
:root[data-theme="light"]{
  --bg:#F9F9FC; --bg-2:#F0F1F4; --hero-top:#E6E8EC;
  --surface:#FFFFFF; --surface-2:#EEF0F3; --line:#D3D7DD;
  --fg:#1A1C1E; --muted:#42474E;
  --volt:#BDEE36; --volt-ink:#557A00; --on-volt:#15190A;
  --zone:#1E9E57; --hard:#D9483A; --easy:#2F7FD6; --watts:#7A5BD6;
  --track:#D9DCE1; color-scheme:light}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--fg);font:400 17px/1.6 var(--font);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--volt-ink)}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--volt);outline-offset:3px;border-radius:6px}
h1,h2,h3{line-height:1.1;letter-spacing:-.02em;text-wrap:balance;margin:0}
p{margin:0}
.wrap{max-width:var(--max);margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
.num{font-variant-numeric:tabular-nums}
.label{font-size:13px;font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}

/* Header */
header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid color-mix(in srgb,var(--line) 50%,transparent)}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:21;background:var(--bg)}
.top .wrap{display:flex;align-items:center;gap:20px;padding-block:12px}
.brand{display:flex;align-items:center;gap:10px;color:var(--fg);text-decoration:none;font-weight:700;font-size:20px}
.brand img{width:34px;height:34px;border-radius:9px}
.top nav{display:flex;gap:22px;margin-left:auto;font-size:15px}
.top nav a{color:var(--muted);text-decoration:none}
.top nav a:hover{color:var(--fg)}
.lang{display:flex;gap:2px;border:1px solid var(--line);border-radius:999px;padding:3px;font-size:13px;font-weight:500}
.lang a,.lang span{padding:4px 10px;border-radius:999px;text-decoration:none;color:var(--muted)}
.lang span{background:var(--surface-2);color:var(--fg)}
@media (max-width:760px){.top nav{display:none}.langs{margin-left:auto}}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:10px;min-height:52px;padding:0 24px;border-radius:999px;font:700 16px var(--font);text-decoration:none;border:0;cursor:pointer}
.btn-volt{background:var(--volt);color:var(--on-volt)}
.btn-volt:hover{filter:brightness(1.06)}
.btn-ghost{color:var(--fg);border:1px solid var(--line)}
.btn-ghost:hover{background:var(--surface-2)}

/* Hero */
.hero{background:linear-gradient(180deg,var(--hero-top) 0%,var(--bg-2) 55%,var(--bg) 100%);overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;padding-block:72px 0}
.hero-copy{display:flex;flex-direction:column;gap:22px;padding-bottom:72px;min-width:0}
.hero h1{font-size:clamp(40px,6vw,68px);font-weight:700}
.hero h1 em{font-style:normal;color:var(--volt-ink)}
.hero .lede{font-size:clamp(18px,2vw,20px);color:var(--muted);max-width:34em}
.cta{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.cta-note{font-size:14px;color:var(--muted)}
.tester{display:flex;gap:12px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px 16px;font-size:15px;color:var(--muted);max-width:32em}
.tester b{color:var(--fg)}
.dot{flex:none;width:10px;height:10px;margin-top:7px;border-radius:50%;background:var(--zone);box-shadow:0 0 0 4px color-mix(in srgb,var(--zone) 25%,transparent)}
.hero-visual{position:relative;justify-self:center;width:min(380px,100%);align-self:end}

/* Phone frame like the Play screenshots */
.phone{background:#0B0C0E;border:1px solid #2D3035;border-radius:42px;padding:10px;box-shadow:0 30px 80px rgba(0,0,0,.45)}
.phone img{border-radius:32px;width:100%}
.hero .phone{border-bottom-left-radius:0;border-bottom-right-radius:0;border-bottom:0;padding-bottom:0}
.hero .phone img{border-bottom-left-radius:0;border-bottom-right-radius:0}

/* Pacer strip (signature moment) */
.pacer{display:grid;grid-template-columns:auto 1fr;gap:28px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:24px 28px;margin-top:-1px}
.pacer svg{width:220px;height:auto;overflow:visible}
.pacer .arc-track{fill:none;stroke:var(--track);stroke-width:14;stroke-linecap:round}
.pacer .arc-fill{fill:none;stroke:var(--volt);stroke-width:14;stroke-linecap:round;stroke-dasharray:300;stroke-dashoffset:300;animation:fill 2.31s cubic-bezier(.3,.6,.4,1) infinite}
.pacer .bead{fill:var(--fg);stroke:var(--bg);stroke-width:4}
.pacer .swing{transform-origin:110px 110px;animation:swing 2.31s infinite}
.pacer .spm{fill:var(--fg);font:700 34px var(--font)}
.pacer .spm-l{fill:var(--muted);font:500 11px var(--font);letter-spacing:.14em}
@keyframes swing{
  0%{transform:rotate(-100deg);animation-timing-function:cubic-bezier(.35,0,.25,1)}
  33%{transform:rotate(100deg);animation-timing-function:cubic-bezier(.45,0,.55,1)}
  100%{transform:rotate(-100deg)}}
@keyframes fill{
  0%{stroke-dashoffset:300;animation-timing-function:cubic-bezier(.35,0,.25,1)}
  33%{stroke-dashoffset:0;animation-timing-function:cubic-bezier(.45,0,.55,1)}
  100%{stroke-dashoffset:300}}
@media (prefers-reduced-motion:reduce){.pacer .swing,.pacer .arc-fill{animation:none}.pacer .arc-fill{stroke-dashoffset:120}.pacer .swing{transform:rotate(20deg)}}
.pacer h2{font-size:24px;margin-bottom:8px}
.pacer p{color:var(--muted)}
.phase{display:flex;gap:18px;margin-top:12px;font-size:14px;color:var(--muted)}
.phase span::before{content:"";display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:7px;vertical-align:-1px;background:var(--volt)}
.phase span+span::before{background:var(--track)}

/* Sections */
section{padding-block:96px}
section+section{border-top:1px solid color-mix(in srgb,var(--line) 45%,transparent)}
.head{display:flex;flex-direction:column;gap:14px;max-width:40em;margin-bottom:48px}
.head h2{font-size:clamp(32px,4.4vw,48px)}
.head p{color:var(--muted);font-size:18px}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:s;list-style:none;margin:0;padding:0}
.steps li{counter-increment:s;display:flex;flex-direction:column;gap:10px;padding:26px 24px 28px;border-top:2px solid var(--line)}
.steps li:last-child{border-top-color:var(--volt)}
.steps li::before{content:counter(s);font:700 15px var(--font);color:var(--muted);font-variant-numeric:tabular-nums}
.steps h3{font-size:22px}
.steps p{color:var(--muted)}

/* Feature split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split.rev .media{order:-1}
.feats{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:18px}
.feats li{display:grid;grid-template-columns:22px 1fr;gap:12px}
.feats li::before{content:"";width:12px;height:12px;margin-top:7px;border-radius:50%;border:3px solid var(--volt)}
.feats b{font-weight:700}
.feats span{color:var(--muted)}
.zones{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.chip{font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:7px 12px;border-radius:999px;border:1.5px solid currentColor}
.chip.z{color:var(--zone)}.chip.h{color:var(--hard)}.chip.e{color:var(--easy)}
.landscape{margin-top:28px}
.landscape .phone{border-radius:30px;padding:8px}
.landscape .phone img{border-radius:22px}
.media{display:flex;justify-content:center;min-width:0}
.media .phone{width:min(360px,100%)}
.trio{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:start}
.trio figure{margin:0;display:flex;flex-direction:column;gap:14px}
.trio figcaption{font-size:15px;color:var(--muted)}
.trio figcaption b{color:var(--fg);display:block;font-size:17px;margin-bottom:2px}
.trio .phone{border-radius:34px;padding:8px}
.trio .phone img{border-radius:27px}
.trio figure:nth-child(2){margin-top:48px}
.programs{display:flex;flex-wrap:wrap;gap:10px;margin:28px 0 0;padding:0;list-style:none}
.programs li{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:10px 16px;font-weight:500}
.programs li small{display:block;color:var(--muted);font-weight:400;font-size:13px}
.records{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.records span{font-variant-numeric:tabular-nums;font-weight:500;font-size:14px;padding:6px 12px;border-radius:8px;background:var(--surface-2)}

/* Garmin */
.watches{display:flex;gap:18px;flex-wrap:wrap;justify-content:center}
.watch{width:min(200px,42vw);aspect-ratio:1;max-width:100%;border-radius:50%;background:#0B0C0E;padding:12px;border:6px solid #2D3035;box-shadow:0 20px 50px rgba(0,0,0,.35)}
.watch img{border-radius:50%}
.models{margin-top:22px;font-size:15px;color:var(--muted)}

/* Works with */
.devices{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.device{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:24px;display:flex;flex-direction:column;gap:8px}
.device h3{font-size:19px}
.device p{color:var(--muted);font-size:15px}
.device .tag{align-self:flex-start;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--volt-ink)}

/* Privacy band */
.privacy{background:var(--bg-2)}
.privacy .wrap{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.nos{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;list-style:none;margin:0;padding:0}
.nos li{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px 20px;font-weight:700;font-size:19px}

/* Pricing table */
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
table{border-collapse:collapse;width:100%;min-width:560px;font-size:16px}
th,td{padding:15px 20px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
tr:last-child td{border-bottom:0}
thead th{font-size:14px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:500}
thead th.pro{color:var(--volt-ink)}
td:nth-child(n+2),th:nth-child(n+2){width:22%}
td.y{color:var(--zone);font-weight:700}
td.n{color:var(--muted)}
td small{display:block;color:var(--muted);font-size:13px}
.price{display:flex;flex-wrap:wrap;gap:16px 40px;align-items:baseline;margin-top:28px}
.price .from{font-size:36px;font-weight:700}
.price .from small{font-size:17px;font-weight:500;color:var(--muted)}
.price p{color:var(--muted);max-width:34em;font-size:15px}

/* FAQ */
.faq{display:flex;flex-direction:column;max-width:780px}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px;padding:20px 0;font-weight:700;font-size:19px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--volt-ink);font-size:24px;line-height:1}
.faq details[open] summary::after{content:"–"}
details p{color:var(--muted);padding-bottom:22px;max-width:40em}

/* Closing CTA and footer */
.closing{text-align:left}
.closing .wrap{display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between}
.closing h2{font-size:clamp(28px,3.6vw,40px);max-width:16em}
footer{border-top:1px solid var(--line);padding-block:36px 48px;font-size:14px;color:var(--muted)}
footer .wrap{display:flex;flex-direction:column;gap:10px}
footer .row{display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--fg)}
footer a{color:var(--fg)}

@media (max-width:900px){
  .hero .wrap,.split,.privacy .wrap{grid-template-columns:1fr}
  .hero .wrap{padding-block:44px 0;gap:8px}
  .hero-copy{padding-bottom:36px}
  .hero-visual{width:min(330px,88%)}
  .split.rev .media{order:0}
  .devices{grid-template-columns:repeat(2,1fr)}
  section{padding-block:68px}
}
@media (max-width:640px){
  body{font-size:16px}
  .steps,.trio{grid-template-columns:1fr}
  .trio figure:nth-child(2){margin-top:0}
  .trio figure{display:grid;grid-template-columns:42% 1fr;align-items:center;gap:18px}
  .pacer{grid-template-columns:1fr;justify-items:center;text-align:center;padding:22px}
  .phase{justify-content:center}
  .devices,.nos{grid-template-columns:1fr}
}

/* Language menu */
.langs{position:relative;margin-left:auto}
.top nav+.langs{margin-left:0}
.langs summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:999px;padding:6px 12px;font-size:14px;font-weight:500;color:var(--fg)}
.langs summary::-webkit-details-marker{display:none}
.langs summary::after{content:"";width:7px;height:7px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:translateY(-2px) rotate(45deg)}
.langs[open] summary::after{transform:translateY(2px) rotate(225deg)}
.langs ul{position:absolute;right:0;top:calc(100% + 8px);list-style:none;margin:0;padding:6px;min-width:220px;white-space:nowrap;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:0 16px 40px rgba(0,0,0,.3);z-index:30}
.langs li a{display:flex;justify-content:space-between;gap:12px;padding:9px 12px;border-radius:9px;color:var(--fg);text-decoration:none;font-size:15px}
.langs li a:hover{background:var(--surface-2)}
.langs li a small{color:var(--muted);font-variant-numeric:tabular-nums;text-transform:uppercase;letter-spacing:.06em}
.langs li a[aria-current]{background:var(--surface-2);font-weight:700}
.nos li span{color:var(--muted);font-weight:400}
.media.col{flex-direction:column;align-items:center}
.landscape{width:100%}
.models b,.head p b{color:var(--fg)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.sr:focus{position:fixed;left:max(16px,env(safe-area-inset-left,0px));top:calc(env(safe-area-inset-top,0px) + 12px);width:auto;height:auto;clip:auto;z-index:40;background:var(--volt);color:var(--on-volt);padding:10px 16px;border-radius:999px;font-weight:700}