/* =====================================================================
   RespiFlo - respiflo-official.com
   Visual language: "Open Air" - alpine fresh-air respiratory theme
   Glacier blue + eucalyptus sage on a misty canvas. Outfit + Lexend.
   ===================================================================== */

:root{
  --canvas:#f2f7f6;
  --paper:#ffffff;
  --mist:#e4eef0;
  --ink:#15211f;
  --soft:#516460;
  --line:#d6e2e2;
  --glacier:#2b8fb8;
  --glacier-d:#1f7197;
  --sage:#5a9b78;
  --sage-d:#427a5c;
  --amber:#e0a92e;
  --petrol:#10322f;
  --petrol-2:#0b2422;
  --shadow:0 14px 40px rgba(16,50,47,.10);
  --shadow-sm:0 6px 18px rgba(16,50,47,.08);
  --radius:14px;
  --radius-sm:10px;
  --wrap:1140px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--canvas);
  color:var(--ink);
  font-family:"Lexend",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:17px;
  line-height:1.68;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:"Outfit",system-ui,sans-serif;line-height:1.14;font-weight:700;letter-spacing:-.01em;margin:0 0 .5em}
h1{font-size:clamp(2.05rem,4.6vw,3.25rem)}
h2{font-size:clamp(1.6rem,3.3vw,2.3rem)}
h3{font-size:1.22rem}
p{margin:0 0 1.05em}
a{color:var(--glacier-d);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}
.shell{max-width:var(--wrap);margin:0 auto;padding:0 22px}

/* ---- promo ribbon ---- */
.ribbon{background:var(--petrol);color:#dff0ec;text-align:center;font-size:.86rem;
  padding:8px 16px;letter-spacing:.01em}
.ribbon b{color:#fff}

/* ---- top bar / nav ---- */
.topbar{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.navrow{display:flex;align-items:center;gap:18px;height:70px}
.brand{display:flex;align-items:center;gap:10px;font-family:"Outfit",sans-serif;
  font-weight:700;font-size:1.28rem;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand img{width:30px;height:30px}
.brand span b{color:var(--glacier-d)}
.links{display:flex;gap:20px;margin-left:auto;align-items:center}
.links a{color:var(--soft);font-size:.95rem;font-weight:500}
.links a:hover{color:var(--glacier-d);text-decoration:none}
.nav-cta{background:var(--glacier);color:#fff !important;padding:9px 18px;border-radius:var(--radius-sm);
  font-weight:600 !important;box-shadow:var(--shadow-sm)}
.nav-cta:hover{background:var(--glacier-d)}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--line);
  border-radius:8px;padding:8px 11px;cursor:pointer;font-size:1.1rem;color:var(--ink)}

@media(max-width:920px){
  .links{position:fixed;inset:70px 0 auto 0;background:var(--paper);flex-direction:column;
    gap:0;padding:8px 0;border-bottom:1px solid var(--line);box-shadow:var(--shadow);
    transform:translateY(-130%);transition:transform .28s ease;margin:0}
  .links.open{transform:translateY(0)}
  .links a{padding:13px 24px;width:100%;border-bottom:1px solid var(--mist)}
  .nav-cta{margin:10px 24px;text-align:center}
  .menu-btn{display:inline-block}
}

/* ---- buttons ---- */
.btn{display:inline-block;background:var(--glacier);color:#fff;font-weight:600;
  padding:14px 26px;border-radius:var(--radius-sm);box-shadow:var(--shadow-sm);
  font-family:"Outfit",sans-serif;transition:transform .12s ease,background .2s}
.btn:hover{background:var(--glacier-d);text-decoration:none;transform:translateY(-2px)}
.btn-sage{background:var(--sage)}
.btn-sage:hover{background:var(--sage-d)}
.btn-ghost{background:transparent;color:var(--glacier-d);border:1.5px solid var(--glacier);
  box-shadow:none}
.btn-ghost:hover{background:rgba(43,143,184,.08)}
.btn-lg{padding:16px 34px;font-size:1.06rem}

/* ---- hero ---- */
.lede{padding:64px 0 40px;background:
  radial-gradient(60% 80% at 78% 8%,rgba(90,155,120,.16),transparent 60%),
  radial-gradient(70% 90% at 12% 92%,rgba(43,143,184,.14),transparent 60%)}
.lede .shell{display:grid;grid-template-columns:1.05fr .95fr;gap:46px;align-items:center}
.eyebrow{display:inline-block;background:#e0efe9;color:var(--sage-d);font-weight:600;
  font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;padding:6px 13px;
  border-radius:999px;margin-bottom:16px}
.lede p.sub{font-size:1.12rem;color:var(--soft);max-width:34em}
.lede-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:24px;align-items:center}
.stars{color:var(--amber);font-size:1rem}
.trust-line{font-size:.9rem;color:var(--soft);margin-top:16px}
.stage{position:relative;text-align:center}
.vial{max-height:430px;margin:0 auto;filter:drop-shadow(0 24px 34px rgba(16,50,47,.22))}
.seal{position:absolute;bottom:8px;right:6px;background:var(--paper);border:1px solid var(--line);
  border-radius:999px;padding:10px 16px;font-size:.82rem;font-weight:600;box-shadow:var(--shadow);
  color:var(--sage-d)}
.holder{display:flex;align-items:center;justify-content:center;min-height:330px;
  background:linear-gradient(160deg,#e4eef0,#d3e6e2);border-radius:24px;color:var(--soft);
  font-weight:600}
@media(max-width:880px){
  .lede .shell{grid-template-columns:1fr;text-align:center}
  .lede-cta{justify-content:center}
  .vial{max-height:340px}
  .lede p.sub{margin-inline:auto}
}

/* ---- marquee strip ---- */
.marquee{background:var(--petrol);color:#cfe6e0;overflow:hidden;white-space:nowrap;padding:12px 0}
.marquee .track{display:inline-block;animation:slide 24s linear infinite}
.marquee span{margin:0 26px;font-size:.9rem;font-weight:500}
.marquee b{color:var(--amber)}
@keyframes slide{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---- generic sections ---- */
.band{padding:64px 0}
.band-mist{background:var(--mist)}
.band-petrol{background:var(--petrol);color:#dceee9}
.band-petrol h2,.band-petrol h3{color:#fff}
.center{text-align:center;max-width:42em;margin-inline:auto}
.kicker{color:var(--glacier-d);font-weight:600;text-transform:uppercase;letter-spacing:.07em;
  font-size:.8rem;margin-bottom:8px}

/* ---- card grids ---- */
.cols{display:grid;gap:22px;margin-top:36px}
.cols-3{grid-template-columns:repeat(3,1fr)}
.cols-4{grid-template-columns:repeat(4,1fr)}
.cols-2{grid-template-columns:repeat(2,1fr)}
.panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow-sm)}
.panel h3{margin-top:6px}
.panel .num{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;
  border-radius:10px;background:#e0efe9;color:var(--sage-d);font-family:"Outfit";font-weight:700}
.panel .ic{font-size:1.7rem}
@media(max-width:880px){.cols-3,.cols-4{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.cols-3,.cols-4,.cols-2{grid-template-columns:1fr}}

/* ---- split / duo ---- */
.duo{display:grid;grid-template-columns:1fr 1fr;gap:42px;align-items:center}
.duo.flip .face{order:2}
@media(max-width:820px){.duo{grid-template-columns:1fr;gap:26px}.duo.flip .face{order:0}}
.face{background:linear-gradient(160deg,#e4eef0,#d3e6e2);border-radius:20px;min-height:300px;
  display:flex;align-items:center;justify-content:center;padding:24px}
.face img{max-height:300px;filter:drop-shadow(0 16px 24px rgba(16,50,47,.18))}

/* ---- figures / stats ---- */
.figures{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:34px;text-align:center}
.figures .fig b{display:block;font-family:"Outfit";font-size:2.1rem;color:var(--glacier-d);line-height:1}
.figures .fig span{font-size:.9rem;color:var(--soft)}
@media(max-width:660px){.figures{grid-template-columns:1fr 1fr}}

/* ---- ingredient list ---- */
.ingr{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:34px}
.ingr .item{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow-sm)}
.ingr .item h3{color:var(--sage-d)}
.ingr .item .dose{font-size:.85rem;color:var(--soft);font-weight:600;text-transform:uppercase;
  letter-spacing:.04em}
@media(max-width:720px){.ingr{grid-template-columns:1fr}}

/* ---- pricing ---- */
.price-row{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:40px;align-items:stretch}
.tier{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:28px 24px;
  text-align:center;box-shadow:var(--shadow-sm);position:relative}
.tier--hot{border:2px solid var(--glacier);box-shadow:var(--shadow);transform:translateY(-14px)}
.tier .flag{position:absolute;top:-15px;left:50%;transform:translateX(-50%);background:var(--petrol);
  color:#fff;font-size:.74rem;font-weight:700;letter-spacing:.05em;padding:6px 16px;border-radius:999px;
  text-transform:uppercase;white-space:nowrap}
.tier .size{font-family:"Outfit";font-weight:700;font-size:1.3rem}
.tier .supply{font-size:.85rem;color:var(--soft);margin-bottom:14px}
.packshot{height:170px;margin:8px auto 16px;display:flex;align-items:center;justify-content:center}
.packshot img{max-height:170px;max-width:100%;object-fit:contain;filter:drop-shadow(0 12px 18px rgba(16,50,47,.2))}
.amount{font-family:"Outfit";font-size:2.5rem;font-weight:700;color:var(--ink);line-height:1}
.amount small{font-size:.9rem;color:var(--soft);font-weight:500}
.perday{font-size:.86rem;color:var(--sage-d);font-weight:600;margin:4px 0 14px}
.order-btn{display:block;width:100%;background:var(--glacier);color:#fff;border:none;
  font-family:"Outfit";font-weight:700;font-size:1.05rem;padding:14px;border-radius:var(--radius-sm);
  cursor:pointer;box-shadow:var(--shadow-sm);transition:background .2s,transform .12s}
.order-btn:hover{background:var(--glacier-d);transform:translateY(-2px);text-decoration:none}
.tier--hot .order-btn{background:var(--sage)}
.tier--hot .order-btn:hover{background:var(--sage-d)}
.sums{margin-top:14px;font-size:.9rem;color:var(--soft)}
.cut{text-decoration:line-through;color:#9aa9a6}
.freight{color:var(--sage-d);font-weight:600}
.pickrate{font-size:.82rem;color:var(--soft);margin-top:8px;font-style:italic}
.bonus{display:inline-block;background:#fbf2da;color:#8a6a16;font-size:.8rem;font-weight:600;
  padding:5px 11px;border-radius:999px;margin:10px 0 2px}
@media(max-width:820px){.price-row{grid-template-columns:1fr;gap:30px}.tier--hot{transform:none}}

/* ---- guarantee badge block ---- */
.assure{display:flex;gap:24px;align-items:center;background:var(--paper);border:1px solid var(--line);
  border-radius:18px;padding:30px;box-shadow:var(--shadow-sm)}
.assure .ring{flex:0 0 auto;width:108px;height:108px;border-radius:50%;border:4px solid var(--sage);
  display:flex;align-items:center;justify-content:center;text-align:center;font-family:"Outfit";
  font-weight:700;color:var(--sage-d);line-height:1.05}
.assure .ring b{font-size:1.8rem;display:block}
@media(max-width:560px){.assure{flex-direction:column;text-align:center}}

/* ---- reviews ---- */
.voice{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:24px;
  box-shadow:var(--shadow-sm);color:var(--ink)}
.voice p{color:var(--ink)}
.voice .stars{font-size:.95rem;margin-bottom:8px}
.voice .who{display:flex;align-items:center;gap:10px;margin-top:14px;font-size:.9rem;color:var(--soft)}
.voice .av{width:36px;height:36px;border-radius:50%;background:#e0efe9;color:var(--sage-d);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-family:"Outfit"}
.meter{margin-top:8px}
.meter .row{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.meter .lab{width:130px;font-size:.9rem;color:var(--soft)}
.barfill{flex:1;height:9px;background:var(--mist);border-radius:999px;overflow:hidden}
.barfill i{display:block;height:100%;background:var(--sage);border-radius:999px}
.meter .val{width:38px;text-align:right;font-weight:600;font-size:.9rem}

/* ---- FAQ ---- */
.q-item{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-sm);
  margin-bottom:12px;overflow:hidden}
.q-item summary{cursor:pointer;padding:18px 22px;font-family:"Outfit";font-weight:600;list-style:none;
  display:flex;justify-content:space-between;gap:14px;align-items:center}
.q-item summary::-webkit-details-marker{display:none}
.q-item summary::after{content:"+";font-size:1.4rem;color:var(--glacier);font-weight:400}
.q-item[open] summary::after{content:"\2013"}
.q-item .a{padding:0 22px 20px;color:var(--soft)}

/* ---- prose (guides/legal) ---- */
.prose{max-width:760px;margin-inline:auto}
.prose h2{margin-top:1.6em}
.prose h3{margin-top:1.4em}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin-bottom:.5em}
.toc{background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--sage);
  border-radius:var(--radius-sm);padding:20px 24px;margin:24px 0}
.toc h4{margin:0 0 10px;font-family:"Outfit"}
.toc ul{margin:0;padding-left:1.1em}
.toc a{color:var(--glacier-d)}
.crumbs{font-size:.86rem;color:var(--soft);margin-bottom:8px}
.crumbs a{color:var(--soft)}
.callout{background:#e0efe9;border-radius:var(--radius-sm);padding:20px 24px;margin:24px 0;
  border-left:4px solid var(--sage)}

/* ---- contact grid ---- */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:30px}
.contact .panel b{color:var(--glacier-d)}
@media(max-width:680px){.contact{grid-template-columns:1fr}}

/* ---- cta strip ---- */
.cta-strip{background:linear-gradient(135deg,var(--glacier),var(--sage));color:#fff;text-align:center;
  border-radius:22px;padding:48px 28px;margin:8px 0}
.cta-strip h2{color:#fff}
.cta-strip .btn{background:#fff;color:var(--glacier-d)}
.cta-strip .btn:hover{background:#eef7f4}

/* ---- footer ---- */
.footer{background:var(--petrol-2);color:#a9c6c0;padding:54px 0 30px;font-size:.92rem}
.footer .grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
.footer h4{color:#fff;font-size:.95rem;margin-bottom:14px}
.footer a{color:#a9c6c0;display:block;margin-bottom:8px}
.footer a:hover{color:#fff}
.footer .brand{color:#fff;margin-bottom:12px}
.fineprint{border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:22px;
  font-size:.8rem;color:#7fa39c;line-height:1.6}
@media(max-width:760px){.footer .grid{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.footer .grid{grid-template-columns:1fr}}

/* ---- reveal ---- */
[data-rise]{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
[data-rise].seen{opacity:1;transform:none}

/* ---- misc ---- */
.lead{font-size:1.12rem;color:var(--soft)}
.chip{display:inline-block;background:#e0efe9;color:var(--sage-d);font-size:.8rem;font-weight:600;
  padding:5px 12px;border-radius:999px;margin:3px 4px 3px 0}
.note-sm{font-size:.85rem;color:var(--soft)}
hr.soft{border:none;border-top:1px solid var(--line);margin:40px 0}