/* ===========================================================
   Leptozan — shared stylesheet
   Theme: light, white + #d4f1f2 (bottle mint), yellow CTA
   =========================================================== */

:root{
  --mint:#d4f1f2;
  --mint-deep:#a9dfe1;
  --ink:#1c2b2f;
  --ink-soft:#4c6066;
  --paper:#ffffff;
  --paper-alt:#f4fbfb;
  --yellow:#ffcb2b;
  --yellow-deep:#f0a900;
  --line:#e1eef0;
  --shadow-sm:0 6px 18px rgba(28,60,64,.08);
  --shadow-md:0 16px 40px rgba(28,60,64,.12);
  --radius:16px;
  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,600;9..144,700&family=Inter:wght@400;500;600;700&display=swap');

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--paper);
  line-height:1.65;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;line-height:1.15;margin:0 0 14px;color:var(--ink);}
h1{font-size:clamp(34px,5vw,54px);}
h2{font-size:clamp(26px,3.4vw,36px);}
h3{font-size:20px;}
p{margin:0 0 16px;color:var(--ink-soft);}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;border-radius:14px;}
ul{margin:0;}
.container{max-width:1180px;margin:0 auto;padding:0 24px;}
.wrap-narrow{max-width:820px;}
section{padding:76px 0;}
.alt-bg{background:var(--paper-alt);}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:15px 30px;border-radius:100px;font-weight:700;font-size:16px;
  transition:transform .25s ease, box-shadow .25s ease, background .25s ease;
  border:none;cursor:pointer;
}
.btn-primary{
  background:var(--yellow);color:#2a1e00;box-shadow:var(--shadow-sm);
}
.btn-primary:hover{background:var(--yellow-deep);transform:translateY(-3px);box-shadow:var(--shadow-md);}
.btn-header{padding:11px 22px;font-size:14.5px;}

/* top strip */
.top-strip{
  background:var(--paper);border-bottom:1px solid var(--line);
  text-align:center;font-size:13.5px;color:var(--ink-soft);
  padding:9px 16px;letter-spacing:.2px;
}

/* header */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:1180px;margin:0 auto;padding:16px 24px;
  display:flex;align-items:center;justify-content:space-between;
}
.logo{font-family:var(--font-display);font-weight:700;font-size:22px;display:flex;align-items:center;gap:8px;}
.logo .drop{width:12px;height:16px;background:var(--mint-deep);border-radius:50% 50% 50% 0;transform:rotate(45deg);display:inline-block;}
.main-nav ul{display:flex;gap:30px;list-style:none;padding:0;margin:0;}
.main-nav a{font-size:15px;font-weight:600;color:var(--ink-soft);transition:color .2s;}
.main-nav a:hover{color:var(--ink);}
.header-actions{display:flex;align-items:center;gap:16px;}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px;}
.hamburger span{width:22px;height:2px;background:var(--ink);border-radius:2px;}

/* hero */
.hero{position:relative;overflow:hidden;padding:70px 0 90px;}
.hero-bg-wave{
  position:absolute;inset:-20% -10% auto -10%;height:130%;
  background:radial-gradient(60% 60% at 80% 20%, var(--mint) 0%, transparent 70%),
             radial-gradient(50% 50% at 10% 80%, var(--mint) 0%, transparent 70%);
  z-index:0;
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr 1fr;gap:56px;align-items:center;}
.offer-line{display:inline-block;background:var(--yellow);color:#2a1e00;font-weight:700;font-size:13.5px;padding:7px 16px;border-radius:100px;margin-bottom:14px;}
.save-line{font-weight:700;color:#c0392b;font-size:15px;margin-bottom:6px;}
.hero-copy h1{margin-bottom:6px;}
.hero-copy h2{font-size:19px;font-weight:500;font-family:var(--font-body);color:var(--ink-soft);max-width:46ch;margin-bottom:26px;}
.hero-cta-row{margin-top:26px;}
.social-proof-line{margin-top:14px;font-size:14px;color:var(--ink-soft);}
.hero-media{position:relative;}
.frame{background:var(--mint);border-radius:24px;padding:26px;box-shadow:var(--shadow-md);}
.mineral-badge{
  position:absolute;bottom:-16px;left:-16px;background:var(--paper);
  padding:10px 16px;border-radius:100px;font-size:13px;font-weight:700;box-shadow:var(--shadow-sm);
}

/* section head */
.section-head{text-align:center;max-width:640px;margin:0 auto 40px;}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--yellow-deep);margin-bottom:10px;}
.tag-pill{display:inline-block;background:var(--mint);color:var(--ink);font-weight:700;font-size:13px;padding:6px 14px;border-radius:100px;margin-bottom:14px;}

/* generic grids/cards */
.overview-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.overview-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center;box-shadow:var(--shadow-sm);}
.overview-card .num{display:block;font-weight:700;color:var(--yellow-deep);font-size:13px;text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px;}
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.split.rev > div:first-child{order:2;}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.feature-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm);}
.feature-card .icon{font-family:var(--font-display);font-size:22px;color:var(--mint-deep);margin-bottom:10px;}

/* tables */
.table-wrap{overflow-x:auto;background:var(--paper);border-radius:var(--radius);box-shadow:var(--shadow-sm);}
table{width:100%;border-collapse:collapse;min-width:640px;}
th,td{padding:16px 18px;text-align:left;font-size:15px;border-bottom:1px solid var(--line);vertical-align:top;}
th{background:var(--mint);color:var(--ink);font-family:var(--font-display);font-weight:600;}
tbody tr:last-child td{border-bottom:none;}
.compare-table .yes{color:#1a7a4c;font-weight:700;}
.compare-table .no{color:#c0392b;font-weight:700;}

/* pros/cons */
.proscons{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.pc-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm);}
.pc-card ul{padding-left:20px;color:var(--ink-soft);}
.pc-card li{margin-bottom:10px;}

/* pricing */
.pricing-media{max-width:900px;margin:0 auto;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-md);}
.guarantee-strip{display:flex;align-items:center;gap:14px;max-width:760px;margin:34px auto 0;background:var(--mint);padding:20px 24px;border-radius:var(--radius);}

/* reviews */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.review-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);}
.review-card img{border-radius:0;}
.review-note{text-align:center;font-size:13.5px;color:var(--ink-soft);margin-top:18px;}

/* accordion */
.accordion{max-width:820px;margin:0 auto;}
.acc-item{border-bottom:1px solid var(--line);}
.acc-q{width:100%;background:none;border:none;text-align:left;padding:20px 4px;font-family:var(--font-display);font-size:17px;font-weight:600;display:flex;justify-content:space-between;align-items:center;cursor:pointer;color:var(--ink);}
.plus{color:var(--yellow-deep);font-size:20px;transition:transform .25s;}
.acc-item.open .plus{transform:rotate(45deg);}
.acc-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.acc-item.open .acc-a{max-height:400px;}
.acc-a p{padding:0 4px 18px;}

/* learn cards */
.learn-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.learn-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-sm);transition:transform .25s,box-shadow .25s;}
.learn-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);}
.readmore{font-weight:700;color:var(--yellow-deep);font-size:14px;}

/* references */
.ref-list{list-style:none;padding:0;display:flex;flex-direction:column;gap:14px;}
.ref-list li{background:var(--paper-alt);border:1px solid var(--line);border-radius:12px;padding:16px 18px;font-size:14.5px;color:var(--ink-soft);}
.ref-list a{color:var(--yellow-deep);font-weight:700;}

/* footer */
footer{background:#12262a;color:#fff;padding:64px 0 30px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;margin-bottom:36px;}
footer h4{color:#fff;font-family:var(--font-body);font-size:14px;text-transform:uppercase;letter-spacing:.06em;margin-bottom:14px;}
footer ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:10px;}
footer a{color:rgba(255,255,255,.75);font-size:14.5px;transition:color .2s;}
footer a:hover{color:var(--yellow);}
.fda-box{border-top:1px solid rgba(255,255,255,.15);padding-top:24px;font-size:13px;line-height:1.7;color:rgba(255,255,255,.6);}

/* back to top */
#backToTop{
  position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:50%;
  background:var(--yellow);color:#2a1e00;border:none;font-size:18px;cursor:pointer;
  box-shadow:var(--shadow-md);opacity:0;pointer-events:none;transition:opacity .3s, transform .3s;
  z-index:60;
}
#backToTop.show{opacity:1;pointer-events:auto;}
#backToTop:hover{transform:translateY(-4px);}

/* article pages (educational content) */
.article-hero{background:var(--mint);padding:60px 0 50px;}
.article-hero .eyebrow{color:#0a5c60;}
.article-hero h1{max-width:20ch;}
.article-meta{font-size:14px;color:var(--ink-soft);margin-top:6px;}
.article-body{max-width:760px;margin:0 auto;padding:60px 24px;}
.article-body h2{margin-top:44px;}
.article-body h3{margin-top:28px;color:var(--ink);}
.article-body p{font-size:17px;}
.article-body ul, .article-body ol{padding-left:22px;color:var(--ink-soft);margin-bottom:18px;}
.article-body li{margin-bottom:10px;}
.callout{background:var(--paper-alt);border-left:4px solid var(--mint-deep);border-radius:8px;padding:18px 22px;margin:26px 0;font-size:15.5px;color:var(--ink-soft);}
.callout strong{color:var(--ink);}

/* reveal-on-scroll */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s ease;}
.reveal.in{opacity:1;transform:translateY(0);}

/* responsive */
@media (max-width:980px){
  .hero-grid,.split{grid-template-columns:1fr;}
  .split.rev > div:first-child{order:0;}
  .overview-grid,.card-grid,.proscons,.review-grid,.learn-grid{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:720px){
  .main-nav{position:fixed;top:64px;left:0;right:0;background:var(--paper);border-bottom:1px solid var(--line);
    transform:translateY(-130%);transition:transform .3s ease;padding:10px 24px 20px;}
  .main-nav.open{transform:translateY(0);}
  .main-nav ul{flex-direction:column;gap:16px;}
  .hamburger{display:flex;}
  .header-actions .btn-header{display:none;}
  .overview-grid,.card-grid,.proscons,.review-grid,.learn-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  section{padding:56px 0;}
}