/* Batch — marketing site
   Palette is the app's own, copied from css/batch.css :root */
:root{
  --bg:#FFF6E9;
  --bg2:#FDEFDD;
  --card:#FFFFFF;
  --ink:#3A3042;
  --sub:#8a7a64;
  --soft:#F2E4CE;
  --coral:#FF6B6B;
  --coral-deep:#d94f4f;
  --teal:#2EC4B6;
  --teal-deep:#1e9c8f;
  --sun:#FFBF3F;
  --purple:#9B5DE5;
  --blue:#4CC9F0;
  --green:#57CC99;
  --radius:20px;
  --maxw:1080px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font:16px/1.6 ui-rounded,-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--teal-deep);text-decoration:none}
a:hover{text-decoration:underline}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,246,233,.9);
  backdrop-filter:saturate(150%) blur(12px);
  border-bottom:2px solid var(--soft);
}
.nav .wrap{display:flex;align-items:center;gap:20px;height:62px}
.brand{
  font-size:24px;font-weight:900;letter-spacing:-.5px;
  color:var(--ink);text-decoration:none;
}
.brand em{color:var(--coral);font-style:normal}
.brand:hover{text-decoration:none}
.nav nav{margin-left:auto;display:flex;gap:22px;align-items:center}
.nav nav a{color:var(--sub);font-size:14px;font-weight:800;text-decoration:none}
.nav nav a:hover{color:var(--ink)}
@media (max-width:720px){ .nav nav a.hide-sm{display:none} }

/* ---------- buttons ---------- */
/* NOTE: `.nav nav a` above is more specific than `.btn-primary`, so the button
   colours MUST be restated for nav buttons (see .nav nav a.btn-* below) or the
   label silently renders muted-on-coral. */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 24px;border-radius:16px;font-weight:900;font-size:16px;
  border:0;cursor:pointer;text-decoration:none;
  transition:transform .08s ease,box-shadow .08s ease,filter .12s ease;
}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--coral);color:#fff;box-shadow:0 5px 0 var(--coral-deep)}
.btn-primary:hover{filter:brightness(1.04)}
.btn-primary:active{transform:translateY(4px);box-shadow:0 1px 0 var(--coral-deep)}
.btn-ghost{background:var(--card);color:var(--ink);box-shadow:0 5px 0 var(--soft)}
.btn-ghost:hover{filter:brightness(.99)}
.btn-ghost:active{transform:translateY(4px);box-shadow:0 1px 0 var(--soft)}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:12px;box-shadow:0 4px 0 var(--coral-deep)}
.btn-sm:active{box-shadow:0 1px 0 var(--coral-deep)}
/* restated — nav link colours out-specify .btn-* */
.nav nav a.btn-primary{color:#fff}
.nav nav a.btn-ghost{color:var(--ink)}

/* ---------- hero ---------- */
.hero{padding:72px 0 56px;position:relative}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(720px 420px at 18% -10%,rgba(255,107,107,.16),transparent 62%),
             radial-gradient(620px 400px at 90% 6%,rgba(46,196,182,.16),transparent 64%);
}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.12fr .88fr;gap:48px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:900;letter-spacing:.09em;text-transform:uppercase;
  color:var(--coral-deep);background:#fff;
  border-radius:999px;padding:8px 16px;margin-bottom:22px;
  box-shadow:0 3px 0 var(--soft);
}
h1{
  font-size:clamp(32px,5.2vw,54px);line-height:1.06;letter-spacing:-.03em;
  font-weight:900;margin:0 0 20px;
}
h1 .hl{color:var(--coral)}
.lede{font-size:clamp(17px,2.1vw,20px);color:var(--sub);margin:0 0 30px;max-width:52ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:22px}
.hero-note{font-size:13.5px;color:var(--sub);max-width:46ch}
.hero-note b{color:var(--ink);font-weight:800}
.hero-art{display:flex;justify-content:center;align-items:center}

/* two real app screenshots in CSS phone bezels — front = a lesson card,
   back = the unit screen, peeking out from behind. */
.phones{position:relative;width:100%;max-width:372px}
.phone{
  margin:0;padding:7px;border-radius:32px;
  background:linear-gradient(160deg,#FFFFFF,#F2E4CE);
  box-shadow:0 18px 40px rgba(58,48,66,.20), 0 2px 0 rgba(255,255,255,.7) inset;
}
/* height:auto is REQUIRED — the width/height attributes otherwise beat the
   CSS width and the phones render at their native 620×1198. */
.phone img{width:100%;height:auto;display:block;border-radius:25px}
.phone.front{position:relative;z-index:2;width:64%;transform:rotate(-3deg)}
/* Keep the overlap light. The back phone is the lesson card, and what stays
   visible of it is the diagram — years and prices, which still read at half
   width. (Putting the unit screen back here instead looks broken: its cropped
   edge is sentences with their left halves missing.) */
.phone.back{
  position:absolute;top:5%;right:0;z-index:1;width:57%;
  transform:rotate(7deg);transform-origin:bottom left;
}
@media (max-width:860px){
  .hero{padding:44px 0 36px}
  .hero .wrap{grid-template-columns:1fr;gap:34px}
  .hero-art{order:-1}
  .phones{max-width:320px}
}
/* on a phone, two phones is clutter — show the lesson card only */
@media (max-width:560px){
  .phones{max-width:230px}
  .phone.back{display:none}
  .phone.front{width:100%;transform:rotate(-2deg)}
}

/* ---------- stats ---------- */
.stats{border-top:2px solid var(--soft);border-bottom:2px solid var(--soft);background:var(--bg2)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding-top:26px;padding-bottom:26px}
.stat{text-align:center}
.stat b{display:block;font-size:clamp(24px,3.6vw,34px);font-weight:900;letter-spacing:-.02em;color:var(--coral)}
.stat span{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--sub);font-weight:800}
@media (max-width:560px){ .stats .wrap{grid-template-columns:repeat(2,1fr);gap:20px 8px} }

/* ---------- sections ---------- */
/* scroll-margin-top keeps the sticky nav from covering anchor targets */
section{padding:76px 0;scroll-margin-top:74px}
.sec-head{max-width:660px;margin-bottom:40px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.kicker{
  font-size:12px;font-weight:900;letter-spacing:.1em;text-transform:uppercase;
  color:var(--teal-deep);margin:0 0 12px;
}
h2{font-size:clamp(26px,3.6vw,36px);line-height:1.14;letter-spacing:-.02em;font-weight:900;margin:0 0 14px}
.sec-head p{color:var(--sub);font-size:17px;margin:0}
.alt{background:var(--bg2);border-top:2px solid var(--soft);border-bottom:2px solid var(--soft)}

/* ---------- feature cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media (max-width:860px){ .grid-3{grid-template-columns:1fr} }
.card{
  background:var(--card);border-radius:var(--radius);padding:26px;
  box-shadow:0 4px 0 var(--soft);
}
.card h3{font-size:18px;margin:0 0 10px;font-weight:900;letter-spacing:-.01em}
.card p{color:var(--sub);font-size:15px;margin:0}
.card .ico{
  width:52px;height:52px;border-radius:16px;display:grid;place-items:center;
  margin-bottom:16px;font-size:17px;font-weight:900;
  background:var(--coral);color:#fff;
}
.card .ico.b{background:var(--teal);font-size:24px}
.card .ico.g{background:var(--sun);color:var(--ink);font-size:24px}

/* ---------- card types ---------- */
.types{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.type{
  background:var(--card);box-shadow:0 3px 0 var(--soft);
  border-radius:999px;padding:10px 18px;font-size:14px;font-weight:800;color:var(--ink);
}
.type i{font-style:normal;color:var(--sub);font-weight:600}

/* ---------- unit grid ---------- */
.filters{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:26px}
.chip{
  background:var(--card);color:var(--sub);box-shadow:0 3px 0 var(--soft);
  border:0;border-radius:999px;padding:10px 18px;font-size:14px;font-weight:800;cursor:pointer;
  font-family:inherit;transition:color .12s ease,background .12s ease;
}
.chip:hover{color:var(--ink)}
.chip[aria-pressed="true"]{background:var(--coral);color:#fff;box-shadow:0 3px 0 var(--coral-deep)}
.units{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media (max-width:900px){ .units{grid-template-columns:repeat(3,1fr)} }
@media (max-width:680px){ .units{grid-template-columns:repeat(2,1fr);gap:12px} }
.unit{
  background:var(--card);border-radius:18px;overflow:hidden;
  display:flex;flex-direction:column;box-shadow:0 4px 0 var(--soft);
}
.unit.hidden{display:none}
/* height:auto is REQUIRED — without it the width/height attributes beat
   aspect-ratio and every card renders square-and-a-half too tall. */
.unit img{aspect-ratio:1/1;object-fit:cover;width:100%;height:auto;background:var(--soft)}
.unit .body{padding:13px 14px 16px}
.unit .cat{
  font-size:10.5px;font-weight:900;letter-spacing:.08em;text-transform:uppercase;
  color:var(--teal-deep);display:block;margin-bottom:5px;
}
.unit h3{font-size:15px;line-height:1.28;margin:0 0 6px;font-weight:900;letter-spacing:-.01em}
.unit p{font-size:12px;color:var(--sub);margin:0;line-height:1.45;font-weight:600}

/* ---------- track list ---------- */
.tracklist{
  margin-top:34px;background:var(--card);border-radius:var(--radius);
  padding:6px 22px;box-shadow:0 4px 0 var(--soft);
}
.track{
  display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;
  padding:15px 0;border-bottom:2px solid var(--bg);
}
.track:last-child{border-bottom:0}
.track b{font-size:15.5px;font-weight:900;flex:none}
.track span{font-size:14px;color:var(--sub);flex:1 1 200px;min-width:0}
.track i{
  font-style:normal;font-size:12px;font-weight:900;color:var(--teal-deep);
  background:var(--bg);border-radius:999px;padding:4px 12px;flex:none;white-space:nowrap;
}

/* ---------- install ---------- */
.install{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media (max-width:860px){ .install{grid-template-columns:1fr} }
.panel{
  background:var(--card);border-radius:var(--radius);padding:28px;
  box-shadow:0 4px 0 var(--soft);
}
.panel-head{display:flex;align-items:center;gap:12px;margin-bottom:8px}
.panel-head svg{width:26px;height:26px;flex:none}
.panel-head h3{font-size:20px;margin:0;font-weight:900;letter-spacing:-.01em}
.panel .req{font-size:13px;color:var(--sub);margin:0 0 22px;padding-left:38px}
.panel .req b{color:var(--coral-deep);font-weight:900}
ol.steps{list-style:none;counter-reset:s;margin:0;padding:0}
ol.steps li{counter-increment:s;position:relative;padding:0 0 22px 46px}
ol.steps li:last-child{padding-bottom:0}
ol.steps li::before{
  content:counter(s);position:absolute;left:0;top:-2px;
  width:31px;height:31px;border-radius:50%;
  background:var(--teal);color:#fff;
  display:grid;place-items:center;font-weight:900;font-size:14px;
}
ol.steps li::after{
  content:"";position:absolute;left:15px;top:34px;bottom:6px;width:2px;background:var(--soft);
}
ol.steps li:last-child::after{display:none}
ol.steps strong{display:block;font-size:15px;margin-bottom:3px;font-weight:900}
ol.steps span{font-size:14px;color:var(--sub)}
.key{
  display:inline-flex;align-items:center;gap:5px;
  background:var(--bg);border-radius:7px;
  padding:2px 8px;font-size:13px;font-weight:800;color:var(--ink);white-space:nowrap;
}
.key svg{width:13px;height:13px}
.callout{
  margin-top:26px;background:var(--card);
  border-left:5px solid var(--sun);border-radius:14px;padding:20px 24px;
  box-shadow:0 4px 0 var(--soft);
}
.callout p{margin:0;font-size:14.5px;color:var(--sub)}
.callout b{color:var(--ink);font-weight:800}

/* ---------- faq ---------- */
.faq{max-width:760px;margin:0 auto}
details{border-bottom:2px solid var(--soft);padding:20px 0}
details summary{
  cursor:pointer;font-weight:900;font-size:16.5px;list-style:none;
  display:flex;align-items:flex-start;gap:14px;
}
details summary::-webkit-details-marker{display:none}
details summary::after{
  content:"+";margin-left:auto;color:var(--coral);font-weight:900;font-size:22px;line-height:1;flex:none;
}
details[open] summary::after{content:"\2212"}
details p{color:var(--sub);font-size:15px;margin:12px 0 0;padding-right:36px}

/* ---------- final cta ---------- */
.final{text-align:center;padding:88px 0}
.final h2{max-width:620px;margin-left:auto;margin-right:auto}
.final p{color:var(--sub);font-size:17px;max-width:540px;margin:0 auto 30px}
.final .hero-cta{justify-content:center}

/* ---------- footer ---------- */
footer{border-top:2px solid var(--soft);background:var(--bg2);padding:38px 0}
footer .wrap{display:flex;flex-wrap:wrap;gap:16px;align-items:center}
footer .brand{font-size:21px}
footer .links{margin-left:auto;display:flex;gap:20px;flex-wrap:wrap}
footer .links a{color:var(--sub);font-size:14px;font-weight:700;text-decoration:none}
footer .links a:hover{color:var(--ink)}
.disclaimer{
  margin-top:24px;padding-top:22px;border-top:2px solid var(--soft);
  font-size:12.5px;color:var(--sub);line-height:1.6;max-width:820px;
}
.disclaimer b{color:var(--ink)}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}