/* =========================================================
   MIND VAULT — mindvvault.com
   Design System: "Clinical Precision"
   A structured, lab-report inspired identity built for trust.
   Palette: deep navy + slate blue + powder tint
   Type: Poppins (display) / Inter (body) — sans-serif only
   ========================================================= */
:root{
  --navy-deep:#16273F;
  --navy-mid:#2C4A6E;
  --slate-blue:#5C7A99;
  --powder-tint:#E4EBF2;
  --white:#FFFFFF;
  --off-white:#F7F9FB;
  --text-body:#20242B;      /* near-black, warm */
  --text-muted:#4A5568;
  --border-light:#D7E0E9;
  --radius:12px;             /* squared-off, clinical, not bubbly */
  --radius-sm:6px;
  --shadow-soft:0 4px 16px rgba(22,39,63,.10);
  --shadow-strong:0 8px 28px rgba(22,39,63,.20);
  --font-head:'Poppins',Arial,Helvetica,sans-serif;
  --font-body:'Inter',Arial,Helvetica,sans-serif;
  --font-mono:'IBM Plex Mono','Courier New',monospace; /* for the "lab data" motif */
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;overflow-x:hidden}
body{overflow-x:hidden}
body{
  font-family:var(--font-body);
  color:var(--text-body);
  background:var(--white);
  font-size:18px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-head);color:var(--navy-deep);line-height:1.25;font-weight:700}
h1{font-size:clamp(34px,5vw,52px)}
h2{font-size:clamp(26px,3.4vw,36px)}
h3{font-size:20px}
p{color:var(--text-body)}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
button{font-family:var(--font-body);cursor:pointer;border:none}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip-link{position:absolute;left:-999px;top:0;background:var(--navy-deep);color:#fff;padding:12px 20px;z-index:999;border-radius:0 0 8px 0}
.skip-link:focus{left:0}
a:focus-visible,button:focus-visible{outline:3px solid var(--navy-mid);outline-offset:2px}

/* eyebrow / lab-tag motif */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--navy-mid);font-weight:700;letter-spacing:.06em;text-transform:uppercase;font-size:14px;
  font-family:var(--font-mono);
  border-left:3px solid var(--navy-mid); padding-left:10px;
}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:18px;font-weight:600;padding:16px 34px;border-radius:var(--radius-sm);min-height:44px;transition:background .2s ease,transform .15s ease;}
.btn-primary{background:var(--navy-deep);color:#fff}
.btn-primary:hover{background:#0F1C2C;transform:translateY(-1px)}
.btn-secondary{background:#fff;color:var(--navy-deep);border:2px solid var(--navy-deep)}
.btn-secondary:hover{background:var(--powder-tint)}
.btn-block{width:100%}

.badge-chip{background:var(--powder-tint);color:var(--navy-deep);border-radius:999px;padding:8px 16px;font-size:15px;font-weight:600;display:inline-flex;align-items:center;gap:6px}
.ticker{background:var(--navy-deep);color:#fff;text-align:center;padding:10px 16px;font-size:15px;font-weight:600}

.section-pad{padding:64px 0}
@media(min-width:900px){.section-pad{padding:100px 0}}
.section-off{background:var(--off-white)}
.section-navy{background:var(--navy-deep);color:#fff}
.section-navy h2,.section-navy h3{color:#fff}
.section-navy p{color:#D6E0EA}

.card{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius);box-shadow:var(--shadow-soft);padding:32px}
.grid{display:grid;gap:24px}
@media(min-width:700px){.grid-2{grid-template-columns:1fr 1fr}}
@media(min-width:900px){.grid-3{grid-template-columns:repeat(3,1fr)}}

.disclaimer{background:var(--off-white);border:1px solid var(--border-light);border-radius:var(--radius-sm);padding:20px 24px;font-size:16px;color:var(--text-muted)}

/* Nav */
.site-nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);backdrop-filter:blur(6px);border-bottom:1px solid var(--border-light);transition:box-shadow .2s ease}
.site-nav.scrolled{box-shadow:var(--shadow-soft)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;max-width:1180px;margin:0 auto}
.nav-logo{font-family:var(--font-head);font-weight:700;font-size:20px;color:var(--navy-deep);display:flex;align-items:center;gap:8px}
.nav-links{display:none;gap:28px;align-items:center}
.nav-links a{font-size:16px;font-weight:600;color:var(--text-body)}
.nav-links a:hover{color:var(--navy-mid)}
@media(min-width:900px){.nav-links{display:flex}}
.nav-toggle{display:inline-flex;background:none;font-size:26px;color:var(--navy-deep)}
@media(min-width:900px){.nav-toggle{display:none}}
.mobile-menu{display:none;flex-direction:column;gap:4px;padding:12px 24px 20px;border-top:1px solid var(--border-light)}
.mobile-menu.open{display:flex}
.mobile-menu a{padding:12px 0;font-size:17px;font-weight:600;border-bottom:1px solid var(--border-light)}
.nav-links a.btn,.mobile-menu a.btn{color:#fff}

/* Hero — bottle right (this is the "master" layout) */
.hero{background:var(--navy-deep);background-image:radial-gradient(at 80% 20%,#28405D 0%,#16273F 60%);color:#fff;padding:64px 0 56px}
.hero-grid{display:grid;gap:40px;align-items:center}
@media(min-width:900px){.hero-grid{grid-template-columns:1.1fr .9fr}}
.hero h1{color:#fff}
.hero .lead{font-size:20px;color:#C9D6E4;margin:18px 0 26px;max-width:52ch}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.hero-chips .badge-chip{background:rgba(255,255,255,.1);color:#fff}
.hero-img{background:rgba(255,255,255,.04);border-radius:var(--radius);padding:20px}
.hero-img img{margin:0 auto}

/* Trust badges row */
.trust-row{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;text-align:center}
@media(min-width:700px){.trust-row{grid-template-columns:repeat(3,1fr)}}
@media(min-width:900px){.trust-row{grid-template-columns:repeat(6,1fr)}}
.trust-item{padding:18px 10px;font-size:14px;font-weight:700;color:var(--navy-mid);font-family:var(--font-mono)}

/* Ingredient "spec sheet" rows */
.spec-row{display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center;padding:20px 0;border-bottom:1px solid var(--border-light)}
.spec-row:first-child{border-top:1px solid var(--border-light)}
.spec-num{font-family:var(--font-mono);color:var(--slate-blue);font-weight:700;margin-right:10px}

/* Pricing */
.price-card{border:1px solid var(--border-light);border-radius:var(--radius);padding:32px;text-align:center;position:relative;background:#fff}
.price-card.featured{border:2px solid var(--navy-deep);box-shadow:var(--shadow-strong);transform:translateY(-8px)}
.price-flag{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--navy-deep);color:#fff;font-size:13px;font-weight:700;padding:6px 16px;border-radius:999px;letter-spacing:.03em}
.price-amount{font-family:var(--font-head);font-size:38px;font-weight:700;color:var(--navy-deep);margin:12px 0 4px}
.price-per{color:var(--text-muted);font-size:15px}

/* Testimonials */
.testi-card{background:var(--off-white);border-radius:var(--radius);padding:28px;display:flex;gap:16px;align-items:flex-start}
.testi-photo{width:60px;height:60px;border-radius:50%;overflow:hidden;flex-shrink:0;object-fit:cover}
.testi-stars{color:var(--navy-mid);font-size:15px;margin-bottom:6px}

/* FAQ */
.faq-item{border-bottom:1px solid var(--border-light)}
.faq-q{width:100%;background:none;text-align:left;padding:20px 0;font-size:18px;font-weight:600;color:var(--navy-deep);display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq-a{display:none;padding:0 0 20px;color:var(--text-muted)}
.faq-item.open .faq-a{display:block}
.faq-item.open .faq-q .plus{transform:rotate(45deg)}
.plus{transition:transform .2s ease;font-size:22px;flex-shrink:0}

table{width:100%;border-collapse:collapse}
th,td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--border-light);font-size:17px}
th{background:var(--powder-tint);color:var(--navy-deep);font-family:var(--font-head)}

/* Footer */
footer{background:var(--navy-deep);color:#fff;padding:56px 0 24px}
footer p{color:#fff}
footer a{color:#C9D6E4}
footer a:hover{color:#fff}
.footer-grid{display:grid;gap:32px}
@media(min-width:700px){.footer-grid{grid-template-columns:2fr 1fr 1fr}}
.footer-links li{margin-bottom:10px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.15);margin-top:36px;padding-top:24px;font-size:14px;color:#9FB1C4}

/* Sticky mobile CTA */
.sticky-cta{position:fixed;bottom:0;left:0;right:0;background:var(--navy-deep);padding:12px 16px;display:flex;gap:12px;align-items:center;justify-content:space-between;z-index:80;box-shadow:0 -4px 16px rgba(0,0,0,.15)}
.sticky-cta p{color:#fff;font-size:16px;font-weight:600}
.sticky-cta .btn{padding:12px 22px;font-size:16px}
@media(min-width:900px){.sticky-cta{display:none}}

/* Exit popup */
.popup-overlay{position:fixed;inset:0;background:rgba(15,22,32,.6);display:none;align-items:center;justify-content:center;z-index:200;padding:20px}
.popup-overlay.active{display:flex}
.popup-box{background:#fff;border-radius:var(--radius);max-width:440px;width:100%;padding:36px;text-align:center;position:relative}
.popup-close{position:absolute;top:14px;right:16px;font-size:24px;background:none;color:var(--text-muted)}
.popup-timer{font-size:32px;font-weight:700;color:var(--navy-deep);margin:12px 0;font-family:var(--font-mono)}

.back-to-top{position:fixed;bottom:90px;right:20px;background:var(--navy-deep);color:#fff;width:48px;height:48px;border-radius:50%;display:none;align-items:center;justify-content:center;font-size:20px;z-index:90}
.back-to-top.show{display:flex}
@media(min-width:900px){.back-to-top{bottom:30px}}

.reading-progress-bar{position:fixed;top:0;left:0;height:4px;background:var(--navy-mid);z-index:150;width:0}