:root{
  --bg:#0b0f17; --bg2:#111726; --card:#151c2c; --card2:#1a2334; --line:#243049;
  --txt:#eaf0fb; --muted:#8a97b3; --muted2:#5f6c88;
  --accent:#3ddc97; --accent2:#22c3e6; --hr:#ff5c7a; --warn:#fbbf24;
  --grad:linear-gradient(135deg,var(--accent),var(--accent2));
  --maxw:1120px; --r:20px;
}
*{box-sizing:border-box;margin:0}
html{scroll-behavior:smooth}
body{
  background:radial-gradient(1200px 700px at 50% -12%,#15243d 0%,transparent 55%),var(--bg);
  color:var(--txt);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,system-ui,sans-serif;
  line-height:1.55;-webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.eyebrow{font-size:.8rem;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
h1,h2,h3{letter-spacing:-.02em;line-height:1.12}
.btn{display:inline-flex;align-items:center;gap:8px;border:none;border-radius:14px;padding:13px 22px;
  font-size:1rem;font-weight:650;cursor:pointer;transition:transform .12s,opacity .2s;font-family:inherit}
.btn-primary{background:var(--grad);color:#04121b;box-shadow:0 10px 30px rgba(61,220,151,.25)}
.btn-ghost{background:transparent;color:var(--txt);border:1px solid var(--line)}
.btn:active{transform:scale(.97)}
.btn-lg{padding:15px 28px;font-size:1.05rem}

/* nav */
.nav{position:sticky;top:0;z-index:20;backdrop-filter:blur(14px);
  background:linear-gradient(180deg,rgba(11,15,23,.92),rgba(11,15,23,.6));border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:11px;font-weight:750;font-size:1.1rem;color:var(--txt)}
.brand img{width:34px;height:34px;border-radius:10px}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{color:var(--muted);font-weight:550;font-size:.95rem}
.nav-links a:hover{color:var(--txt)}
.nav-cta{display:flex;gap:10px;align-items:center}
@media(max-width:760px){.nav-links{display:none}}

/* hero */
.hero{padding:76px 0 40px;text-align:center;position:relative}
.hero h1{font-size:clamp(2.3rem,6vw,4rem);font-weight:800;margin:18px auto 0;max-width:14ch}
.hero .lead{color:var(--muted);font-size:clamp(1.05rem,2.5vw,1.35rem);max-width:44ch;margin:20px auto 0}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:30px}
.hero-note{color:var(--muted2);font-size:.82rem;margin-top:16px}
.badges{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:26px}
.store-badge{display:inline-flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:13px;
  padding:9px 16px;background:#0d1420;color:var(--txt);font-weight:600;font-size:.9rem}
.store-badge small{display:block;font-size:.66rem;color:var(--muted);font-weight:500}
.store-badge svg{width:22px;height:22px}

/* trust bar */
.trust{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:56px;background:#0c111b}
.trust .wrap{display:flex;flex-wrap:wrap;gap:14px 34px;justify-content:center;padding:18px 22px;color:var(--muted);font-size:.9rem}
.trust b{color:var(--txt)}

/* screenshot showcase */
.shots{padding:70px 0 20px;text-align:center}
.shot-row{display:flex;gap:26px;justify-content:center;align-items:flex-end;flex-wrap:wrap;margin-top:40px}
.phone{width:236px;border-radius:34px;padding:9px;background:linear-gradient(160deg,#232c40,#131a28);
  box-shadow:0 30px 70px rgba(0,0,0,.5);border:1px solid #2b3650}
.phone.mid{width:260px;transform:translateY(-18px)}
.phone img{border-radius:26px;width:100%}
.phone-cap{color:var(--muted);font-size:.85rem;margin-top:14px}

/* sections */
section{padding:74px 0}
.sec-head{text-align:center;max-width:640px;margin:0 auto 44px}
.sec-head h2{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:800;margin-top:12px}
.sec-head p{color:var(--muted);font-size:1.08rem;margin-top:14px}

/* feature grid */
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px}
.feature{background:linear-gradient(160deg,var(--card),var(--card2));border:1px solid var(--line);
  border-radius:var(--r);padding:24px}
.feature .fico{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;margin-bottom:14px;
  background:color-mix(in srgb,var(--accent) 16%,transparent);color:var(--accent)}
.feature .fico svg{width:24px;height:24px}
.feature h3{font-size:1.15rem}
.feature p{color:var(--muted);margin-top:8px;font-size:.96rem}

/* OSA highlight */
.osa{background:linear-gradient(160deg,#101a2b,#0c1119);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.osa .wrap{display:grid;grid-template-columns:1.1fr 1fr;gap:44px;align-items:center}
.osa .metric{display:inline-flex;align-items:baseline;gap:8px;margin:18px 0 6px}
.osa .metric b{font-size:3rem;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.osa ul{list-style:none;padding:0;margin:18px 0 0}
.osa li{display:flex;gap:11px;align-items:flex-start;margin:12px 0;color:var(--muted)}
.osa li::before{content:"✓";color:var(--accent);font-weight:800}
.osa-visual{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.spo2-demo{width:100%;height:150px}
.sev-band{display:flex;gap:8px;margin-top:16px;font-size:.72rem;font-weight:700}
.sev-band span{flex:1;text-align:center;padding:6px 4px;border-radius:8px}
.sb-n{background:#0f2a1f;color:var(--accent)}.sb-mi{background:#20260f;color:#c9d64a}
.sb-mo{background:#2a2410;color:var(--warn)}.sb-s{background:#2a1520;color:var(--hr)}
@media(max-width:820px){.osa .wrap{grid-template-columns:1fr}}

/* pricing */
.pricing-toggle{display:flex;align-items:center;justify-content:center;gap:12px;margin:-16px 0 34px;color:var(--muted);font-size:.92rem}
.switch{width:52px;height:28px;border-radius:16px;background:#2a3550;position:relative;cursor:pointer;border:none;flex-shrink:0}
.switch::after{content:"";position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background:#fff;transition:transform .2s}
.switch.on{background:var(--accent)}.switch.on::after{transform:translateX(24px)}
.save-pill{background:color-mix(in srgb,var(--accent) 18%,transparent);color:var(--accent);font-weight:700;font-size:.74rem;padding:3px 9px;border-radius:20px}
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;align-items:stretch}
.plan{background:linear-gradient(160deg,var(--card),var(--card2));border:1px solid var(--line);border-radius:var(--r);
  padding:28px;display:flex;flex-direction:column}
.plan.featured{border-color:color-mix(in srgb,var(--accent) 55%,transparent);box-shadow:0 20px 50px rgba(61,220,151,.12);position:relative}
.plan .tag{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--grad);color:#04121b;
  font-weight:700;font-size:.72rem;padding:5px 14px;border-radius:20px}
.plan h3{font-size:1.3rem}
.plan .price{font-size:2.6rem;font-weight:800;margin:14px 0 2px}
.plan .price small{font-size:.95rem;color:var(--muted);font-weight:600}
.plan .per{color:var(--muted);font-size:.86rem;min-height:20px}
.plan ul{list-style:none;padding:0;margin:20px 0;flex:1}
.plan li{display:flex;gap:10px;align-items:flex-start;margin:11px 0;font-size:.94rem;color:#d6deee}
.plan li::before{content:"✓";color:var(--accent);font-weight:800}
.plan .btn{width:100%;justify-content:center;margin-top:4px}

/* FAQ */
.faq{max-width:760px;margin:0 auto}
.qa{border:1px solid var(--line);border-radius:14px;margin-bottom:12px;background:var(--card);overflow:hidden}
.qa summary{padding:16px 18px;font-weight:650;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";color:var(--accent);font-size:1.3rem;font-weight:700}
.qa[open] summary::after{content:"–"}
.qa .a{padding:0 18px 16px;color:var(--muted);font-size:.95rem}

/* contact / support form */
.support-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
@media(max-width:760px){.support-grid{grid-template-columns:1fr}}
.form-card,.info-card{background:linear-gradient(160deg,var(--card),var(--card2));border:1px solid var(--line);border-radius:var(--r);padding:24px}
.field{margin-bottom:14px}
.field label{display:block;font-size:.8rem;color:var(--muted);font-weight:600;margin-bottom:6px}
.field input,.field textarea{width:100%;background:#0d1420;border:1px solid var(--line);color:var(--txt);
  border-radius:11px;padding:12px;font-size:.95rem;font-family:inherit}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent)}
.info-card h3{margin-bottom:6px}
.info-card p{color:var(--muted);font-size:.94rem;margin:10px 0}
.info-card a{font-weight:600}

/* legal pages */
.legal{max-width:800px;margin:0 auto;padding:40px 0}
.legal h1{font-size:2.2rem;margin-bottom:6px}
.legal .updated{color:var(--muted2);font-size:.85rem;margin-bottom:30px}
.legal h2{font-size:1.3rem;margin:28px 0 10px}
.legal p,.legal li{color:#c9d3e6;font-size:.97rem}
.legal ul{padding-left:20px;margin:10px 0}
.legal li{margin:7px 0}

/* CTA band */
.cta-band{background:linear-gradient(135deg,#0f2a2a,#101a2b);border:1px solid var(--line);border-radius:26px;
  text-align:center;padding:52px 24px;margin:20px auto}
.cta-band h2{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:800}
.cta-band p{color:var(--muted);margin:12px auto 0;max-width:40ch}

/* footer */
.footer{border-top:1px solid var(--line);margin-top:40px;padding:44px 0;color:var(--muted)}
.footer .wrap{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:26px}
@media(max-width:760px){.footer .wrap{grid-template-columns:1fr 1fr}}
.footer h4{font-size:.78rem;text-transform:uppercase;letter-spacing:1px;color:var(--muted2);margin-bottom:12px}
.footer a{display:block;color:var(--muted);font-size:.92rem;margin:7px 0}
.footer a:hover{color:var(--txt)}
.footer .fbrand{color:var(--txt);font-weight:700;display:flex;gap:10px;align-items:center;margin-bottom:10px}
.footer .fbrand img{width:30px;height:30px;border-radius:9px}
.disclaimer{color:var(--muted2);font-size:.8rem;line-height:1.6;margin-top:26px;border-top:1px solid var(--line);padding-top:22px}
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:#e9f8f0;color:#04231a;
  padding:12px 20px;border-radius:12px;font-weight:600;font-size:.9rem;box-shadow:0 10px 30px rgba(0,0,0,.4);z-index:50}