/* ========== WHOOP.cz ========== */
:root{
  --bg:#0a0a0b;
  --bg-2:#101013;
  --bg-3:#16161a;
  --card:#161619;
  --line:#26262c;
  --txt:#f4f4f6;
  --muted:#9a9aa6;
  --accent:#00e0a4;       /* whoop-ish teal/green */
  --accent-2:#37d6ff;     /* electric blue */
  --danger:#ff5470;
  --warn:#ffcf5c;
  --radius:18px;
  --maxw:1120px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--txt);
  font-family:var(--font);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.narrow{max-width:780px}
.grad{
  background:linear-gradient(100deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.4em;
  font-weight:700;font-size:15px;border-radius:999px;
  padding:13px 24px;cursor:pointer;border:1px solid transparent;
  transition:transform .15s ease,box-shadow .25s ease,background .2s ease;
  white-space:nowrap;
}
.btn--lg{padding:16px 34px;font-size:16px}
.btn--sm{padding:9px 18px;font-size:14px}
.btn--block{width:100%}
.btn--primary{
  background:linear-gradient(100deg,var(--accent),var(--accent-2));
  color:#04261d;
  box-shadow:0 8px 30px rgba(0,224,164,.25);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(0,224,164,.4)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--txt)}
.btn--ghost:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- Nav ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(10,10,11,.72);
  backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .3s ease,background .3s ease;
}
.nav.is-scrolled{border-color:var(--line)}
.nav__inner{display:flex;align-items:center;justify-content:space-between;height:66px;gap:20px}
.brand{font-weight:900;font-size:21px;letter-spacing:-.5px}
.brand__mark{color:var(--txt)}
.brand__tld{color:var(--accent)}
.nav__links{display:flex;gap:26px}
.nav__links a{color:var(--muted);font-size:14.5px;font-weight:500;transition:color .2s}
.nav__links a:hover{color:var(--txt)}

/* ---------- Hero ---------- */
.hero{position:relative;padding:90px 0 70px;overflow:hidden}
.hero__glow{
  position:absolute;top:-200px;left:50%;transform:translateX(-50%);
  width:900px;height:600px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(0,224,164,.18),rgba(55,214,255,.08),transparent 70%);
  filter:blur(20px);z-index:0;pointer-events:none;
}
.hero__inner{position:relative;z-index:1;text-align:center;max-width:860px}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:1.5px;
  text-transform:uppercase;color:var(--accent);
  border:1px solid var(--line);border-radius:999px;padding:7px 16px;margin-bottom:26px;
  background:rgba(0,224,164,.05);
}
.hero__title{font-size:clamp(34px,6vw,64px);line-height:1.05;font-weight:900;letter-spacing:-1.5px}
.hero__sub{font-size:clamp(16px,2.2vw,20px);color:var(--muted);margin:24px auto 0;max-width:640px}
.hero__sub strong{color:var(--txt);font-weight:600}
.hero__cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:36px}
.hero__trust{margin-top:18px;font-size:14px;color:var(--accent);font-weight:600;min-height:1px}
.hero__stats{
  list-style:none;display:flex;justify-content:center;gap:14px;flex-wrap:wrap;
  margin-top:54px;
}
.hero__stats li{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 26px;min-width:160px;flex:1 1 160px;max-width:240px;
}
.hero__stats .num{display:block;font-size:30px;font-weight:900;letter-spacing:-1px}
.hero__stats .lbl{display:block;font-size:13px;color:var(--muted);margin-top:4px}

/* ---------- Sections ---------- */
.section{padding:80px 0}
.section--alt{background:var(--bg-2)}
.section__title{font-size:clamp(26px,4vw,42px);font-weight:900;letter-spacing:-1px;text-align:center}
.section__lead{
  text-align:center;color:var(--muted);font-size:18px;max-width:680px;margin:18px auto 46px;
}
.section__lead em{color:var(--txt);font-style:normal;font-weight:600}

/* ---------- Grids / cards ---------- */
.grid{display:grid;gap:18px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(3,1fr)}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;transition:transform .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-4px);border-color:var(--accent)}
.card__icon{font-size:32px;margin-bottom:14px}
.card h3{font-size:20px;margin-bottom:8px}
.card p{color:var(--muted);font-size:15px}

.pill{
  display:flex;align-items:center;gap:12px;
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:18px 20px;font-size:15px;font-weight:500;
}
.pill span{font-size:22px}

/* ---------- Feature rows ---------- */
.feature{
  display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;
  padding:46px 0;border-bottom:1px solid var(--line);
}
.feature:last-child{border-bottom:none}
.feature--rev .feature__text{order:2}
.feature__tag{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:1px;text-transform:uppercase;
  color:var(--accent);margin-bottom:12px;
}
.feature__text h3{font-size:clamp(22px,3vw,30px);font-weight:800;letter-spacing:-.5px;margin-bottom:12px}
.feature__text p{color:var(--muted);font-size:16.5px}
.feature__visual{
  height:230px;border-radius:24px;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(circle at 30% 30%,rgba(0,224,164,.18),transparent 60%),var(--bg-3);
  border:1px solid var(--line);position:relative;overflow:hidden;
}
.feature__visual span{font-size:64px;font-weight:900;letter-spacing:-2px;line-height:1}
.feature__visual small{font-size:18px;font-weight:600;color:var(--muted);margin-left:6px;letter-spacing:0}
.feature__visual--recovery span{color:var(--accent)}
.feature__visual--strain{background:radial-gradient(circle at 30% 30%,rgba(55,214,255,.18),transparent 60%),var(--bg-3)}
.feature__visual--strain span{color:var(--accent-2)}
.feature__visual--sleep{background:radial-gradient(circle at 30% 30%,rgba(150,120,255,.2),transparent 60%),var(--bg-3)}
.feature__visual--sleep span{color:#a78bff}

/* ---------- Price card ---------- */
.price-card{
  background:linear-gradient(180deg,var(--card),var(--bg-3));
  border:1px solid var(--line);border-radius:24px;padding:36px;max-width:560px;margin:0 auto;
  position:relative;
}
.price-card__badge{
  display:inline-block;background:var(--accent);color:#04261d;font-weight:800;font-size:12px;
  letter-spacing:.5px;text-transform:uppercase;padding:5px 12px;border-radius:999px;margin-bottom:14px;
}
.price-card h3{font-size:26px;font-weight:900}
.price-card__desc{color:var(--muted);margin-top:6px;font-size:15px}
.checklist{list-style:none;margin:26px 0}
.checklist li{position:relative;padding:9px 0 9px 32px;border-bottom:1px solid var(--line);font-size:15.5px}
.checklist li:last-child{border-bottom:none}
.checklist li::before{
  content:"✓";position:absolute;left:0;top:9px;color:var(--accent);font-weight:900;
}
.price-card__note{text-align:center;color:var(--muted);font-size:13px;margin-top:14px}

/* ---------- FAQ ---------- */
.faq details{
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:0 22px;margin-bottom:12px;overflow:hidden;
}
.faq summary{
  cursor:pointer;list-style:none;font-weight:600;font-size:16.5px;padding:18px 0;
  display:flex;justify-content:space-between;align-items:center;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:24px;color:var(--accent);font-weight:400;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{color:var(--muted);padding:0 0 20px;font-size:15.5px}

/* ---------- Final CTA ---------- */
.cta{padding:90px 0;text-align:center;background:
  radial-gradient(circle at 50% 0%,rgba(0,224,164,.12),transparent 55%),var(--bg-2)}
.cta__inner h2{font-size:clamp(28px,5vw,48px);font-weight:900;letter-spacing:-1px}
.cta__inner p{color:var(--muted);font-size:18px;margin:18px auto 32px;max-width:520px}

/* ---------- Footer ---------- */
.footer{background:var(--bg);border-top:1px solid var(--line);padding:48px 0}
.footer__inner{display:flex;flex-direction:column;gap:18px;max-width:760px;margin:0 auto;text-align:center;align-items:center}
.footer__small{color:var(--muted);font-size:13px}
.disclosure{
  color:var(--muted);font-size:13px;line-height:1.7;
  background:var(--bg-2);border:1px solid var(--line);border-radius:14px;padding:18px 22px;
}
.disclosure strong{color:var(--txt)}

/* ---------- Responsive ---------- */
@media(max-width:880px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,1fr)}
  .feature{grid-template-columns:1fr;gap:24px;text-align:center}
  .feature--rev .feature__text{order:0}
  .feature__visual{height:180px}
  .nav__links{display:none}
}
@media(max-width:540px){
  .grid--3,.grid--4{grid-template-columns:1fr}
  .hero{padding:60px 0 50px}
  .section{padding:60px 0}
  .price-card{padding:26px 22px}
}