:root{
  --bg:#f7f5f0;--surface:#fff;--soft:#efece5;--fg:#16161a;--muted:#6b6b72;--faint:#9a9aa1;
  --line:rgba(22,22,26,.09);--accent:#e8552a;--ink:#16161a;--link:#0a66d8;
  --r-lg:28px;--r-md:18px;--max:1120px;
  --sans:-apple-system,BlinkMacSystemFont,"SF Pro Text","Inter","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --display:-apple-system,BlinkMacSystemFont,"SF Pro Display","Inter","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0e0e10;--surface:#17171a;--soft:#1d1d21;--fg:#f2f1ee;--muted:#a0a0a8;--faint:#6e6e76;
  --line:rgba(255,255,255,.09);--ink:#f2f1ee;--link:#6cb0ff}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}
.narrow{max-width:760px}

/* Header */
.site-header{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(180%) blur(18px);-webkit-backdrop-filter:saturate(180%) blur(18px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--fg);font-weight:650;letter-spacing:-.01em;font-size:16px}
.brand:hover{text-decoration:none}

.nav{display:flex;gap:6px;align-items:center}
.nav a{color:var(--muted);font-size:14px;padding:7px 14px;border-radius:999px}
.nav a:hover{color:var(--fg);text-decoration:none;background:var(--soft)}
.nav a[aria-current=page]{color:var(--fg);background:var(--surface);box-shadow:0 0 0 1px var(--line)}

/* Eyebrow + type */
.eyebrow{font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);font-weight:600}
h1,h2,h3{font-family:var(--display);letter-spacing:-.025em;color:var(--fg)}
.display{font-size:clamp(44px,7.4vw,96px);line-height:1.0;font-weight:500;letter-spacing:-.045em;margin:18px 0 0}
.dot{color:var(--accent)}
.lede{font-size:clamp(17px,1.6vw,20px);line-height:1.55;color:var(--muted);max-width:560px;margin:26px 0 0}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:10px;height:46px;padding:0 22px;border-radius:999px;font-weight:600;font-size:15px;transition:transform .15s ease,box-shadow .2s ease}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-dark{background:var(--ink);color:var(--bg)}
.btn-ghost{color:var(--fg);box-shadow:inset 0 0 0 1px var(--line);background:var(--surface)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.arrow{transition:transform .2s ease}.btn:hover .arrow{transform:translateX(3px)}

/* Hero */
.hero{padding:96px 0 72px}
.hero-grid{display:grid;grid-template-columns:180px 1fr;gap:40px}
.hero-meta{padding-top:22px;line-height:1.9}
.pills{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:40px;color:var(--muted);font-size:13.5px}
.pills span{display:inline-flex;align-items:center;gap:8px}
.pills span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);opacity:.85}

/* Sections */
.section{padding:88px 0;border-top:1px solid var(--line)}
.section-head{display:grid;grid-template-columns:180px 1fr;gap:40px;margin-bottom:44px}
.section-head h2{font-size:clamp(30px,3.6vw,44px);line-height:1.08;font-weight:500;margin:0}

/* App showcase */
.showcase{display:grid;grid-template-columns:1.05fr 1fr;gap:0;background:var(--surface);border-radius:var(--r-lg);box-shadow:0 0 0 1px var(--line),0 30px 60px -30px rgba(0,0,0,.18);overflow:hidden}
.stage{background:radial-gradient(120% 90% at 30% 10%,#dfeee6 0%,#e9efe9 35%,#efece5 100%);display:grid;place-items:center;padding:56px 24px;min-height:560px}
@media (prefers-color-scheme:dark){.stage{background:radial-gradient(120% 90% at 30% 10%,#1d2a24 0%,#18201c 40%,#141416 100%)}}
.app-info{padding:56px 52px;display:flex;flex-direction:column;justify-content:center}
.app-id{display:flex;align-items:center;gap:16px}
.app-icon{width:64px;height:64px;border-radius:15px;flex:none;background:linear-gradient(160deg,#5fd39a 0%,#2aa37a 55%,#1b7d63 100%);box-shadow:inset 0 0 0 1px rgba(255,255,255,.18),0 8px 18px -8px rgba(27,125,99,.6);position:relative;overflow:hidden}
.app-icon::before{content:"";position:absolute;left:12px;right:12px;bottom:14px;height:22px;border-radius:12px 12px 4px 4px;background:rgba(255,255,255,.92);clip-path:polygon(0 100%,0 60%,18% 40%,36% 55%,56% 15%,76% 35%,100% 0,100% 100%)}
.app-icon::after{content:"";position:absolute;top:11px;right:13px;width:12px;height:12px;border-radius:50%;background:#ffd166}
.app-id h3{margin:0;font-size:24px;font-weight:600;line-height:1.2}
.app-id .eyebrow{margin-top:4px;display:block}
.app-info p{color:var(--muted);font-size:16.5px;margin:22px 0 0}
.feature-list{list-style:none;padding:0;margin:26px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:10px 18px}
.feature-list li{font-size:14.5px;color:var(--fg);display:flex;gap:10px;align-items:baseline}
.feature-list li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--accent);flex:none;transform:translateY(-2px)}
.note{font-size:13px;color:var(--faint);margin-top:26px;padding-top:18px;border-top:1px solid var(--line)}
.badge{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.02em;padding:6px 12px;border-radius:999px;background:var(--soft);color:var(--muted);width:max-content;margin-bottom:22px}
.badge::before{content:"";width:7px;height:7px;border-radius:50%;background:#f0a020;box-shadow:0 0 0 3px rgba(240,160,32,.2)}

/* Phone mock (illustrative, CSS only) */
.phone{width:260px;height:540px;border-radius:46px;background:#111;padding:10px;box-shadow:0 0 0 2px #2a2a2e,0 40px 70px -25px rgba(0,0,0,.45),0 18px 30px -18px rgba(0,0,0,.4)}
.screen{width:100%;height:100%;border-radius:37px;background:#f5f6f4;overflow:hidden;position:relative;font-family:var(--sans);color:#111}
.island{position:absolute;top:10px;left:50%;transform:translateX(-50%);width:84px;height:24px;border-radius:20px;background:#000}
.scr-head{padding:52px 18px 8px}
.scr-head small{font-size:10px;color:#8a8a8f;letter-spacing:.06em;text-transform:uppercase;font-weight:600}
.scr-head b{display:block;font-size:24px;letter-spacing:-.03em;margin-top:2px}
.row{margin:8px 12px;background:#fff;border-radius:16px;padding:12px 14px;display:flex;align-items:center;justify-content:space-between;box-shadow:0 1px 0 rgba(0,0,0,.04)}
.row .l{display:flex;flex-direction:column;gap:3px}
.bar{height:8px;border-radius:4px;background:#e4e4e2}
.bar.w1{width:84px}.bar.w2{width:52px;background:#efefed;height:6px}
.bar.w3{width:70px}.bar.w4{width:96px}
.aqi{min-width:44px;height:30px;border-radius:9px;display:grid;place-items:center;font-weight:700;font-size:12px;color:#fff}
.aqi.g{background:#3bb273}.aqi.m{background:#f2c230;color:#3a2e00}.aqi.o{background:#f28c28}.aqi.r{background:#e2493b}
.widget{position:absolute;left:12px;right:12px;bottom:18px;border-radius:20px;background:linear-gradient(160deg,#2aa37a,#1b7d63);height:92px;padding:14px;color:#fff;display:flex;justify-content:space-between;align-items:flex-end}
.widget .big{font-size:34px;font-weight:700;letter-spacing:-.04em;line-height:1}
.spark{display:flex;gap:4px;align-items:flex-end;height:40px}
.spark i{display:block;width:7px;border-radius:3px;background:rgba(255,255,255,.75)}
.mock-cap{font-size:12px;color:var(--faint);text-align:center;margin-top:18px}

/* Principles */
.principles{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line)}
.principles>div{padding:30px 28px 6px 0}
.principles>div+div{padding-left:28px;border-left:1px solid var(--line)}
.principles h3{font-size:19px;font-weight:600;margin:10px 0 8px}
.principles p{color:var(--muted);margin:0;font-size:15px}

/* Contact band */
.band{background:var(--ink);color:var(--bg);border-radius:var(--r-lg);padding:56px 52px;display:flex;justify-content:space-between;align-items:center;gap:28px;flex-wrap:wrap}
.band h2{color:var(--bg);font-size:clamp(28px,3.2vw,40px);font-weight:500;margin:0;line-height:1.1}
.band p{margin:10px 0 0;color:color-mix(in srgb,var(--bg) 65%,transparent)}
.band .btn{background:var(--bg);color:var(--ink)}

/* Doc pages */
.page-hero{padding:80px 0 40px}
.page-hero .display{font-size:clamp(42px,6vw,72px)}
.doc{padding-bottom:96px}
.doc h2{font-size:28px;font-weight:550;margin:64px 0 14px;padding-top:28px;border-top:1px solid var(--line)}
.doc h3{font-size:19px;font-weight:600;margin:34px 0 8px}
.doc p,.doc li{color:color-mix(in srgb,var(--fg) 82%,var(--bg))}
.doc ul{padding-left:20px}.doc li{margin:6px 0}
.panel{background:var(--surface);border-radius:var(--r-md);padding:28px 30px;box-shadow:0 0 0 1px var(--line);margin:28px 0}
.panel strong.t{display:block;font-family:var(--display);font-size:18px;letter-spacing:-.01em;margin-bottom:6px}
.panel ul{margin:10px 0 0}
.contact-card{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.contact-card p{margin:4px 0 0;color:var(--muted)}
.faq{margin-top:10px;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;padding:20px 40px 20px 0;font-weight:600;font-size:17px;position:relative;letter-spacing:-.01em}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:6px;top:50%;width:10px;height:10px;border-right:1.6px solid var(--muted);border-bottom:1.6px solid var(--muted);transform:translateY(-70%) rotate(45deg);transition:transform .2s ease}
.faq details[open] summary::after{transform:translateY(-30%) rotate(225deg)}
.faq details p{margin:0 0 22px;color:var(--muted);max-width:640px}
.toc{display:flex;flex-wrap:wrap;gap:8px;margin-top:30px}
.toc a{font-size:13.5px;color:var(--muted);padding:7px 14px;border-radius:999px;background:var(--surface);box-shadow:0 0 0 1px var(--line)}
.toc a:hover{color:var(--fg);text-decoration:none}
address{font-style:normal;line-height:1.8}

/* 404 */
.nf{min-height:62vh;display:flex;flex-direction:column;justify-content:center;padding:80px 0}
.nf .display{font-size:clamp(84px,16vw,180px)}

/* Footer */
.site-footer{border-top:1px solid var(--line);padding:40px 0 48px;color:var(--muted);font-size:13.5px}
.site-footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
.site-footer a{color:var(--muted)}.site-footer a:hover{color:var(--fg)}
.foot-links{display:flex;gap:20px}

/* Responsive */
@media (max-width:900px){
  .hero-grid,.section-head{grid-template-columns:1fr;gap:6px}
  .hero-meta{padding-top:0}
  .showcase{grid-template-columns:1fr}
  .stage{min-height:auto;padding:44px 20px}
  .app-info{padding:36px 28px 40px}
  .principles{grid-template-columns:1fr}
  .principles>div,.principles>div+div{padding:24px 0;border-left:0;border-top:1px solid var(--line)}
  .principles>div:first-child{border-top:0}
}
@media (max-width:560px){
  .wrap{padding:0 20px}
  .hero{padding:56px 0 48px}
  .section{padding:60px 0}
  .nav a{padding:6px 10px;font-size:13.5px}
  .brand .full{display:none}
  .feature-list{grid-template-columns:1fr}
  .band{padding:38px 28px}
  .btn-row .btn{flex:1;justify-content:center}
  .panel{padding:22px 20px}
  .phone{width:236px;height:490px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.brand span{font-size:17px;font-weight:700;letter-spacing:-.02em}
.about{background:#16161a;color:#f2f1ee;border-radius:var(--r-lg);padding:64px 56px;display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:center}
@media (prefers-color-scheme:dark){.about{background:var(--surface);box-shadow:0 0 0 1px var(--line)}}
.about .eyebrow{color:#8d8d95}
.about h2{color:#f2f1ee;font-size:clamp(30px,3.6vw,46px);line-height:1.06;font-weight:500;margin:14px 0 0}
.about p{color:#b4b4bb;font-size:16.5px;margin:20px 0 0;max-width:500px}
.stats{display:grid;gap:12px}
.stats div{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08);border-radius:18px;padding:20px 22px;display:flex;flex-direction:column;gap:2px}
.stats b{font-family:var(--display);font-size:26px;font-weight:600;letter-spacing:-.03em;color:#fff}
.stats b::after{content:".";color:var(--accent)}
.stats span{color:#a5a5ad;font-size:14.5px}
.band{background:var(--surface);color:var(--fg);box-shadow:0 0 0 1px var(--line)}
.band h2{color:var(--fg)}.band p{color:var(--muted)}
.band .btn{background:var(--ink);color:var(--bg)}
#contact{scroll-margin-top:90px}
@media (max-width:900px){.about{grid-template-columns:1fr;padding:44px 28px;gap:32px}}
.brand{color:var(--ink)}
.lockup{height:26px;width:auto;display:block}
@media (max-width:340px){.lockup{width:24px;height:26px}.lockup .wm{display:none}}
.apps-top{border-top:0;padding-top:72px}
.section-head h1{font-size:clamp(30px,3.6vw,44px);line-height:1.08;font-weight:500;margin:0}
@media (max-width:560px){.apps-top{padding-top:40px}}
.now{margin:4px 12px 8px;background:#fff;border-radius:16px;padding:12px 14px;display:flex;justify-content:space-between;align-items:center}
.now .big{font-size:38px;font-weight:700;letter-spacing:-.04em;line-height:1;color:#2aa36a}
.now .lbl{font-size:10px;color:#6b6b72;font-weight:600;margin-top:4px}
.card-s{margin:8px 12px;background:#fff;border-radius:16px;padding:10px 12px}
.card-s small{font-size:9px;color:#8a8a8f;letter-spacing:.06em;text-transform:uppercase;font-weight:700}
.hours{display:flex;gap:5px;align-items:flex-end;height:70px;margin-top:6px}
.hours i{flex:1;border-radius:4px;display:block}
.hours i.g,.rng i.g{background:#3bb273}.hours i.m,.rng i.m{background:#f2c230}
.drow{display:flex;align-items:center;gap:8px;margin-top:7px}
.drow .bar{width:26px}
.rng{flex:1;height:6px;border-radius:3px;background:#efefed;position:relative}
.rng i{position:absolute;top:0;bottom:0;border-radius:3px}
.aqi.sm{min-width:30px;height:20px;font-size:10px;border-radius:6px}