/* Reset & base */
*,*::before,*::after{box-sizing:border-box}
html{line-height:1.5;-webkit-text-size-adjust:100%}
body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,Apple Color Emoji,Segoe UI Emoji;color:#0B1220;background:#fff}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit}

/* Design tokens */
:root{
  --bg:#ffffff;--bg-subtle:#F8FAFC;--text:#0B1220;--muted:#475569;--border:#E5E7EB;
  --accent:#2563EB;--accent-hover:#1D4ED8;--radius:12px;--shadow:0 8px 24px rgba(12,25,41,0.08);
  --container:1200px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;--space-6:32px;--space-7:40px;--space-8:56px;--space-9:72px;--space-10:96px;
}

/* QuickAcuity brand scope */
.qa-scope{--accent:#0A84FF;--accent-hover:#006FE0;--qa-teal:#00C7BE;--qa-gradient:linear-gradient(135deg,#0A84FF 0%,#00C7BE 100%)}

/* Layout */
.container{max-width:var(--container);margin-inline:auto;padding:0 var(--space-5)}
.section{padding:var(--space-9) 0}
.section.alt{background:var(--bg-subtle)}
.grid{display:grid;gap:var(--space-6)}
.grid.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}
@media (max-width:1024px){.grid.cols-3,.grid.cols-2{grid-template-columns:1fr}}

/* Header */
.site-header{position:sticky;top:0;background:rgba(255,255,255,0.8);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--border);z-index:50}
.nav{display:flex;align-items:center;gap:var(--space-6);padding:var(--space-4) 0;position:relative}
.nav .brand{display:flex;align-items:center;gap:var(--space-3)}
.nav a{color:#0B1220}
.nav .spacer{flex:1}
.nav .link{opacity:.8}
.nav .link:hover{opacity:1}
.nav-menu{display:flex;align-items:center;gap:var(--space-6)}
.hamburger{display:none;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--border);border-radius:8px;background:#fff}
.hamburger svg{width:22px;height:22px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.cta{display:inline-flex;align-items:center;gap:10px;background:var(--accent);color:#fff;border-radius:999px;padding:10px 16px;font-weight:600;box-shadow:0 4px 14px rgba(37,99,235,.25)}
.cta:hover{background:var(--accent-hover)}
.cta.secondary{background:transparent;color:#0B1220;border:1px solid var(--border);box-shadow:none}
.cta.secondary:hover{border-color:#CDD5DF}

/* Mobile nav */
@media (max-width: 920px){
  .hamburger{display:inline-flex}
  .nav-menu{display:none;position:absolute;top:calc(100% + 8px);left:16px;right:16px;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow);padding:12px}
  .nav-menu.is-open{display:flex}
  .nav-menu a{padding:10px 12px;border-radius:8px}
  .nav-menu a:hover{background:var(--bg-subtle)}
}

/* Hero */
.hero{padding:var(--space-10) 0 var(--space-8);background:linear-gradient(180deg,rgba(10,132,255,0.06),rgba(10,132,255,0))}
.hero h1{font-size:48px;line-height:1.1;margin:0 0 var(--space-4)}
.hero p{font-size:18px;color:var(--muted);max-width:68ch}
.hero .cta-row{display:flex;gap:var(--space-4);flex-wrap:wrap;margin-top:var(--space-5)}

.hero-copy{display:flex;flex-direction:column;gap:var(--space-4);max-width:520px}
.hero-title{margin:0}
.hero-title img{display:block;width:min(280px,60vw);height:auto}
.hero-ekg{max-width:320px;margin-top:var(--space-3)}
.hero-ekg svg{display:block;width:100%;height:auto}
.hero-ekg path{fill:none;stroke:#d40e0e;stroke-width:4;stroke-linecap:round;stroke-linejoin:round;opacity:0.9}
.hero-copy .store-badges{justify-content:flex-start}

@media (max-width:1024px){
  .hero-copy{align-items:center;text-align:center}
  .hero-copy .store-badges{justify-content:center}
  .hero-ekg{margin-inline:auto}
}

/* QuickAcuity hero animation */
.qa-scope{--accent:#0A84FF;--qa-blue:#0A84FF;--accent-hover:#006FE0;--qa-teal:#00C7BE;--qa-gradient:linear-gradient(135deg,#0A84FF 0%,#00C7BE 100%)}
.qa-hero-anim{min-height:220px}
#qaChart{color:#fff;letter-spacing:.06em;user-select:none}
#qaChart .line{display:flex;gap:10px;align-items:baseline;margin:6px 0}
#qaChart .line1{font-weight:800;font-size:clamp(32px,6vw,64px)}
#qaChart .line2{font-weight:800;font-size:clamp(28px,5vw,48px)}
#qaChart .line3{font-weight:800;font-size:clamp(22px,4.2vw,36px)}
#qaChart .line4{font-weight:800;font-size:clamp(18px,3.4vw,28px)}
#qaLogo{display:block;filter:drop-shadow(0 12px 32px rgba(0,0,0,.18));width:clamp(220px,36vw,360px)}

/* Cards */
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:var(--space-6);box-shadow:var(--shadow);transition:transform .15s ease, box-shadow .15s ease}
.card:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(12,25,41,.12)}
.card .eyebrow{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:var(--space-2)}
.card h3{margin:0 0 var(--space-3);font-size:22px}
.card p{color:var(--muted)}
.card .card-cta{margin-top:var(--space-4)}
.card.acuity{border-color:transparent;background:radial-gradient(1200px 400px at 100% -10%, rgba(10,132,255,.08), transparent 70%), #fff}

/* Feature list */
.feature{padding:var(--space-6);border:1px solid var(--border);border-radius:var(--radius);background:#fff}
.feature h4{margin:0 0 var(--space-2)}
.qa-benefits{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-6)}
.qa-benefits .card{min-height:100%;border-top:3px solid rgba(10,132,255,.35)}
.qa-benefits .card:nth-child(2){border-top-color:rgba(0,199,190,.4)}
.qa-benefits .card:nth-child(3){border-top-color:rgba(12,25,41,.25)}

.qa-stepper-shell{margin-top:var(--space-6)}
.qa-stepper{display:grid;gap:var(--space-6)}
.qa-step{display:grid;grid-template-columns:1fr;gap:clamp(24px,3vw,48px);align-items:center;padding:clamp(28px,4vw,56px);background:linear-gradient(160deg,rgba(10,132,255,.05) 0%, rgba(255,255,255,0.95) 100%);border:1px solid rgba(12,25,41,.08);border-radius:28px;box-shadow:0 24px 48px rgba(12,25,41,.12);position:relative;overflow:hidden}
.qa-step::before{content:attr(data-step);position:absolute;top:24px;left:24px;width:36px;height:36px;border-radius:999px;background:rgba(10,132,255,.12);color:var(--qa-blue);display:flex;align-items:center;justify-content:center;font-weight:600}
.qa-step-tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--qa-blue);background:rgba(10,132,255,.08);padding:6px 10px;border-radius:999px;margin-bottom:var(--space-3)}
.qa-step-content{display:flex;flex-direction:column;gap:var(--space-3);justify-content:center;min-height:200px}
.qa-step-content p{margin:0}
.qa-step-media{display:flex;justify-content:center;align-items:center}
.qa-step-media a{display:block}
.qa-device-img{display:block;width:clamp(220px,28vw,320px);max-width:100%;height:auto;border-radius:32px;filter:drop-shadow(0 18px 38px rgba(12,25,41,.18))}

@media (max-width:1024px){
  .qa-benefits{grid-template-columns:1fr}
  .qa-stepper{gap:var(--space-8)}
  .qa-step{grid-template-columns:1fr;padding:var(--space-7) var(--space-6)}
  .qa-step::before{top:20px;left:20px}
  .qa-step-media{margin-top:var(--space-4)}
  .qa-device-img{margin:0 auto;width:min(320px,70vw)}
}

@media (min-width:1025px){
  .qa-benefits{margin-bottom:var(--space-8)}
  .qa-step{grid-template-columns:minmax(0,0.55fr) minmax(0,0.45fr);min-height:500px}
  .qa-step::before{top:28px;left:28px}
  .qa-step-media{justify-content:flex-end}
  .qa-device-img{margin:0;width:clamp(240px,24vw,320px)}
}

/* Gallery */
.gallery{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--space-4)}
@media (max-width:1024px){.gallery{grid-template-columns:repeat(2,minmax(0,1fr))}}
.gallery a{border:1px solid var(--border);border-radius:10px;overflow:hidden}

/* Footer */
.site-footer{padding:var(--space-8) 0;border-top:1px solid var(--border);color:var(--muted)}
.site-footer .row{display:flex;justify-content:space-between;gap:var(--space-6);flex-wrap:wrap}

/* Reveal animations */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .2s ease, transform .2s ease}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){.reveal{transition:none}}

/* Badges */
.store-badges{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.store-badges img{display:block;height:56px;width:auto}
.badge{display:inline-flex;align-items:center;gap:8px;background:#fff}
@media (max-width:600px){
  .store-badges img{height:48px}
}
/* .badge.play{border-color:#34A853;color:#0B1220} */

/* Utilities */
.muted{color:var(--muted)}
.center{display:flex;align-items:center;justify-content:center}
.mt-4{margin-top:var(--space-4)}.mt-6{margin-top:var(--space-6)}.mt-8{margin-top:var(--space-8)}
.mb-0{margin-bottom:0}

/* Download CTA */
.download-cta{background:var(--bg-subtle)}
.download-cta-copy{display:flex;flex-direction:column;gap:var(--space-4);justify-content:center}
.download-qr{display:flex;justify-content:center;align-items:center}
.qr-card{display:flex;flex-direction:column;align-items:center;gap:var(--space-4);padding:var(--space-6);background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.qr-card img{display:block}
@media (max-width:1024px){.download-qr{display:none}}