/* ============================================================
   ADVANCE NANOMEDS — style.css
   Premium science-led wellness brand site
   ============================================================ */

/* ---------- 1. DESIGN TOKENS ---------- */
:root{
  /* colour */
  --warm-white:#FCFBF8;
  --ivory:#F7F4EC;
  --cream:#EFE9DC;
  --stone:#D8D0C1;
  --light-gray:#E7E4DC;
  --charcoal:#20231F;
  --ink:#20231F;
  --ink-soft:#6A6B63;
  --ink-faint:#9A9A90;
  --muted-green:#66765D;
  --deep-green:#3F5039;
  --deep-night:#1C201B;
  --soft-orange:#D98A38;
  --line:#E4DFD3;

  /* type */
  --font-sans:'DM Sans','Helvetica Neue',Arial,sans-serif;
  --font-serif:'Cormorant Garamond',Georgia,serif;

  /* spacing */
  --gutter:clamp(20px,5vw,64px);
  --section-y:clamp(72px,10vw,140px);
  --maxw:1320px;
  --maxw-text:68ch;

  /* form */
  --radius-card:14px;
  --radius-pill:100px;
  --shadow-soft:0 1px 2px rgba(32,35,31,.04),0 12px 32px rgba(32,35,31,.07);
  --shadow-lift:0 2px 6px rgba(32,35,31,.06),0 22px 48px rgba(32,35,31,.12);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. RESET / BASE ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto;}}
body{
  margin:0;
  background:var(--warm-white);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;cursor:pointer;background:none;border:none;}
h1,h2,h3,h4{margin:0;font-weight:500;letter-spacing:-.02em;line-height:1.08;text-wrap:balance;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--deep-green);outline-offset:3px;border-radius:2px;}

/* ---------- 3. LAYOUT ---------- */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter);}
.section{padding-block:var(--section-y);}
.section--ivory{background:var(--ivory);}
.section--cream{background:var(--cream);}
.section--dark{background:var(--deep-night);color:var(--ivory);}
.section--dark .lede,.section--dark .eyebrow{color:rgba(247,244,236,.62);}
.section--tight{padding-block:clamp(56px,7vw,96px);}

.eyebrow{
  font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--ink-faint);font-weight:500;margin:0 0 20px;
}
.h-display{font-size:clamp(2.3rem,5.4vw,4.1rem);}
.h-section{font-size:clamp(1.9rem,3.6vw,3rem);}
.h-sub{font-size:clamp(1.25rem,2vw,1.6rem);}
.serif-accent{font-family:var(--font-serif);font-style:italic;font-weight:400;letter-spacing:-.01em;}
.lede{color:var(--ink-soft);font-size:1.05rem;max-width:var(--maxw-text);margin-top:22px;}
.lede--lg{font-size:clamp(1.1rem,1.6vw,1.35rem);line-height:1.5;color:var(--ink);}

/* ---------- 4. BUTTONS ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 30px;border-radius:var(--radius-pill);
  font-size:.92rem;font-weight:500;letter-spacing:.01em;
  border:1px solid transparent;
  transition:background .3s var(--ease),color .3s var(--ease),
             border-color .3s var(--ease),transform .3s var(--ease);
}
.btn .arw{transition:transform .3s var(--ease);display:inline-block;}
.btn:hover .arw{transform:translateX(4px);}
.btn--primary{background:var(--deep-green);color:var(--ivory);}
.btn--primary:hover{background:var(--charcoal);}
.btn--ghost{border-color:var(--stone);color:var(--ink);}
.btn--ghost:hover{border-color:var(--ink);}
.btn--light{background:var(--ivory);color:var(--charcoal);}
.btn--light:hover{background:#fff;}
.btn--outline-light{border-color:rgba(247,244,236,.35);color:var(--ivory);}
.btn--outline-light:hover{border-color:var(--ivory);}
.btn--sm{padding:11px 22px;font-size:.84rem;}
.btn--block{width:100%;justify-content:center;}
.btn[disabled]{opacity:.45;cursor:not-allowed;}

/* ---------- 5. HEADER / NAV ---------- */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:80;
  padding-block:20px;
  background:rgba(252,251,248,0);
  transition:background .4s var(--ease),box-shadow .4s var(--ease),padding .4s var(--ease);
}
.site-header.is-stuck{
  background:rgba(252,251,248,.88);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  box-shadow:0 1px 0 rgba(32,35,31,.07);
  padding-block:14px;
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;}
.brand{display:flex;align-items:center;gap:11px;flex:none;}
.brand__mark{width:26px;height:26px;flex:none;}
.brand__name{
  font-size:.82rem;letter-spacing:.22em;text-transform:uppercase;font-weight:500;
  white-space:nowrap;
}
.nav__links{display:flex;align-items:center;gap:32px;}
.nav__links a{
  font-size:.88rem;color:var(--ink-soft);position:relative;padding-block:4px;
  transition:color .25s var(--ease);
}
.nav__links a::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;
  background:var(--ink);transform:scaleX(0);transform-origin:right;
  transition:transform .35s var(--ease);
}
.nav__links a:hover{color:var(--ink);}
.nav__links a:hover::after{transform:scaleX(1);transform-origin:left;}
.nav__cta{display:flex;align-items:center;gap:14px;flex:none;}

.burger{display:none;width:42px;height:42px;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:50%;}
.burger span{display:block;width:16px;height:1.5px;background:var(--ink);position:relative;transition:background .2s;}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:16px;height:1.5px;background:var(--ink);
  transition:transform .35s var(--ease);
}
.burger span::before{top:-5px;}
.burger span::after{top:5px;}
.is-menu-open .burger span{background:transparent;}
.is-menu-open .burger span::before{transform:translateY(5px) rotate(45deg);}
.is-menu-open .burger span::after{transform:translateY(-5px) rotate(-45deg);}

.mobile-menu{
  position:fixed;inset:0;z-index:70;background:var(--ivory);
  display:flex;flex-direction:column;justify-content:center;
  padding:0 var(--gutter);
  opacity:0;visibility:hidden;transform:translateY(-12px);
  transition:opacity .4s var(--ease),transform .4s var(--ease),visibility .4s;
}
.mobile-menu.is-open{opacity:1;visibility:visible;transform:none;}
.mobile-menu a{
  font-size:clamp(1.6rem,7vw,2.3rem);padding-block:14px;
  border-bottom:1px solid var(--line);letter-spacing:-.02em;
}
.mobile-menu .btn{margin-top:32px;align-self:flex-start;}

/* ---------- 6. IMAGE SLOT SYSTEM ----------
   <img> points at the real asset path. If the file isn't there yet,
   JS adds .is-missing to the .media wrapper and the labelled slot shows. */
.media{position:relative;overflow:hidden;background:var(--cream);}
.media img{width:100%;height:100%;object-fit:cover;
  transition:transform .8s var(--ease),opacity .6s var(--ease);}
.media--contain img{object-fit:contain;}
.media.is-missing img{opacity:0;}
.media.is-missing{
  background:
    repeating-linear-gradient(135deg,transparent 0 11px,rgba(102,118,93,.07) 11px 22px),
    var(--cream);
  border:1px dashed var(--stone);
}
.media.is-missing::after{
  content:attr(data-slot);
  position:absolute;inset:auto 12px 12px;
  font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted-green);background:rgba(252,251,248,.92);
  padding:7px 11px;border-radius:5px;text-align:center;
  font-variant-numeric:tabular-nums;
}
.media--16x9{aspect-ratio:16/9;}
.media--cap{max-height:70vh;}
.media--4x5{aspect-ratio:4/5;}
.media--1x1{aspect-ratio:1/1;}
.media--3x4{aspect-ratio:3/4;}

/* ---------- 7. HERO ---------- */
.hero{position:relative;padding-top:132px;padding-bottom:clamp(40px,6vw,80px);}
.hero__grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.12fr);
  gap:clamp(28px,5vw,72px);align-items:center;}
.hero__copy{max-width:36ch;}
.hero__title{font-size:clamp(2.4rem,5.2vw,4.2rem);}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px;}
.hero__note{margin-top:26px;font-size:.82rem;color:var(--ink-faint);
  display:flex;align-items:center;gap:9px;}
.hero__note::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--soft-orange);}
.hero__media{border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-soft);}

/* ---------- 8. INTRO ---------- */
.intro__grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
  gap:clamp(32px,6vw,88px);align-items:center;}

/* ---------- 9. PRODUCT GRID ---------- */
.section-head{display:flex;justify-content:space-between;align-items:flex-end;
  gap:28px;flex-wrap:wrap;margin-bottom:clamp(36px,4vw,60px);}
.section-head .lede{margin-top:16px;}
.products{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(16px,2vw,26px);}
.product-card{
  display:flex;flex-direction:column;background:var(--warm-white);
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  transition:transform .45s var(--ease),box-shadow .45s var(--ease),border-color .45s var(--ease);
}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift);border-color:var(--stone);}
.product-card__media{background:var(--ivory);}
.product-card:hover .product-card__media img{transform:translateY(-7px) scale(1.02);}
.product-card__body{padding:22px 22px 26px;display:flex;flex-direction:column;gap:11px;flex:1;}
.product-card__cat{font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint);}
.product-card__name{font-size:1.12rem;letter-spacing:-.015em;line-height:1.25;}
.product-card__desc{font-size:.89rem;color:var(--ink-soft);line-height:1.55;flex:1;}
.product-card__foot{display:flex;align-items:center;justify-content:space-between;
  gap:12px;flex-wrap:wrap;margin-top:6px;}

.badge{
  display:inline-flex;align-items:center;gap:7px;
  font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted-green);border:1px solid var(--stone);
  padding:6px 12px;border-radius:var(--radius-pill);white-space:nowrap;
}
.badge::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--soft-orange);}
.badge--light{color:rgba(247,244,236,.8);border-color:rgba(247,244,236,.3);}

/* ---------- 10. EDITORIAL FEATURE ---------- */
.feature{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:clamp(28px,5vw,80px);align-items:center;}
.feature + .feature{margin-top:clamp(64px,8vw,130px);}
.feature__media{border-radius:var(--radius-card);overflow:hidden;}
.feature--flip .feature__media{order:2;}
.feature__body{max-width:46ch;}
.feature__list{margin-top:26px;display:flex;flex-direction:column;gap:12px;}
.feature__list li{display:flex;gap:12px;font-size:.92rem;color:var(--ink-soft);line-height:1.5;}
.feature__list li::before{content:"";flex:none;width:6px;height:6px;border-radius:50%;
  background:var(--muted-green);margin-top:9px;}
.feature__actions{margin-top:30px;display:flex;gap:12px;align-items:center;flex-wrap:wrap;}

/* ---------- 11. SCIENCE ---------- */
.science__grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);
  gap:clamp(30px,5vw,76px);align-items:center;}
.science__media{border-radius:var(--radius-card);overflow:hidden;}
.section--dark .media{background:#252A24;}
.section--dark .media.is-missing{background:
  repeating-linear-gradient(135deg,transparent 0 11px,rgba(247,244,236,.05) 11px 22px),#252A24;
  border-color:rgba(247,244,236,.18);}
.section--dark .media.is-missing::after{background:rgba(28,32,27,.9);color:rgba(247,244,236,.65);}
.science-band{position:relative;}
.science-band .media{border-radius:0;aspect-ratio:auto;height:clamp(340px,62vh,640px);}
.science-band .media img{height:100%;width:100%;}

.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(20px,3vw,44px);
  margin-top:clamp(40px,5vw,70px);}
.step__num{font-family:var(--font-serif);font-size:2.6rem;line-height:1;color:var(--muted-green);}
.section--dark .step__num{color:#8FA083;}
.step h3{font-size:1.1rem;margin:16px 0 10px;}
.step p{font-size:.9rem;color:var(--ink-soft);}
.section--dark .step p{color:rgba(247,244,236,.62);}
.step{padding-top:22px;border-top:1px solid var(--line);}
.section--dark .step{border-color:rgba(247,244,236,.16);}

/* ---------- 12. LIFESTYLE COLLAGE ---------- */
.collage{display:grid;grid-template-columns:repeat(12,1fr);gap:clamp(16px,2.4vw,30px);align-items:end;}
.collage__main{grid-column:1/8;border-radius:var(--radius-card);overflow:hidden;}
.collage__side{grid-column:8/13;display:flex;flex-direction:column;gap:clamp(16px,2.4vw,30px);}
.collage__small{border-radius:var(--radius-card);overflow:hidden;}
.collage__text{padding-bottom:6px;}

/* ---------- 13. FULL-WIDTH BANNER ---------- */
.banner{position:relative;isolation:isolate;min-height:clamp(420px,62vh,620px);
  display:grid;align-items:center;overflow:hidden;}
.banner .media{position:absolute;inset:0;z-index:-2;height:100%;}
.banner .media::before{content:"";position:absolute;inset:0;z-index:2;
  background:linear-gradient(90deg,rgba(28,32,27,.66) 0%,rgba(28,32,27,.22) 55%,transparent 100%);}
.banner__inner{position:relative;z-index:1;color:var(--ivory);max-width:44ch;}
.banner__inner .lede{color:rgba(247,244,236,.78);}

/* ---------- 14. SPLIT ---------- */
.split{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));align-items:center;
  gap:clamp(28px,5vw,80px);}
.split__media{border-radius:var(--radius-card);overflow:hidden;}

/* ---------- 15. PRINCIPLES ---------- */
.principles{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(18px,2.4vw,32px);}
.principle{padding-top:26px;border-top:1px solid var(--line);}
.principle svg{width:26px;height:26px;color:var(--muted-green);margin-bottom:18px;}
.principle h3{font-size:1.02rem;margin-bottom:9px;}
.principle p{font-size:.88rem;color:var(--ink-soft);}

/* ---------- 16. FINAL CTA ---------- */
.final-cta{text-align:center;}
.final-cta .lede{margin-inline:auto;}
.final-cta__actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:34px;}
.final-cta__note{margin-top:46px;padding-top:30px;border-top:1px solid rgba(247,244,236,.18);
  display:flex;gap:18px;align-items:center;justify-content:center;flex-wrap:wrap;}
.final-cta__note p{color:rgba(247,244,236,.72);font-size:.92rem;}

/* ---------- 17. CONTACT ---------- */
.contact__grid{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1fr);
  gap:clamp(32px,6vw,90px);align-items:start;}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:20px;}
.field label{font-size:.76rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft);}
.field input,.field textarea{
  font:inherit;font-size:.95rem;color:var(--ink);
  padding:14px 16px;border:1px solid var(--line);border-radius:8px;
  background:var(--warm-white);transition:border-color .25s var(--ease);
}
.field input:focus,.field textarea:focus{border-color:var(--muted-green);outline:none;}
.field textarea{resize:vertical;min-height:140px;}
.field.has-error input,.field.has-error textarea{border-color:#B4472F;}
.field__error{font-size:.78rem;color:#B4472F;min-height:1em;}
.form-status{margin-top:16px;font-size:.92rem;color:var(--muted-green);}
.contact__info{display:flex;flex-direction:column;gap:22px;}
.contact__row{padding-bottom:18px;border-bottom:1px solid var(--line);}
.contact__row span{display:block;font-size:.72rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--ink-faint);margin-bottom:6px;}

/* ---------- 18. FOOTER ---------- */
.site-footer{background:var(--deep-night);color:var(--ivory);padding-block:clamp(56px,7vw,92px) 34px;}
.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:clamp(28px,4vw,56px);}
.footer__grid h4{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;
  color:rgba(247,244,236,.5);margin-bottom:18px;font-weight:500;}
.footer__grid a{font-size:.92rem;color:rgba(247,244,236,.78);transition:color .25s;}
.footer__grid a:hover{color:var(--ivory);}
.footer__grid li{margin-bottom:11px;}
.footer__brand p{font-size:.92rem;color:rgba(247,244,236,.6);max-width:34ch;margin-top:18px;}
.footer__brand .brand__name{color:var(--ivory);}
.footer__bottom{margin-top:clamp(40px,5vw,66px);padding-top:26px;
  border-top:1px solid rgba(247,244,236,.15);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:.8rem;color:rgba(247,244,236,.5);}

/* ---------- 19. MODAL ---------- */
.modal{position:fixed;inset:0;z-index:100;display:grid;place-items:center;
  padding:var(--gutter);opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s;}
.modal.is-open{opacity:1;visibility:visible;}
.modal__backdrop{position:absolute;inset:0;background:rgba(28,32,27,.55);
  backdrop-filter:blur(3px);-webkit-backdrop-filter:blur(3px);}
.modal__panel{
  position:relative;width:100%;max-width:460px;background:var(--warm-white);
  border-radius:var(--radius-card);padding:36px;box-shadow:var(--shadow-lift);
  transform:translateY(10px) scale(.985);transition:transform .35s var(--ease);
  max-height:88vh;overflow-y:auto;
}
.modal.is-open .modal__panel{transform:none;}
.modal__panel--wide{max-width:880px;padding:0;overflow:hidden;}
.modal__close{position:absolute;top:14px;right:14px;z-index:3;width:38px;height:38px;
  border-radius:50%;display:grid;place-items:center;background:var(--warm-white);
  border:1px solid var(--line);font-size:1.1rem;line-height:1;}
.modal__close:hover{background:var(--ivory);}
.modal h3{font-size:1.35rem;margin-bottom:12px;}
.modal__intro{font-size:.92rem;color:var(--ink-soft);margin-bottom:24px;}
.modal__fine{font-size:.76rem;color:var(--ink-faint);margin-top:14px;line-height:1.5;}
.modal__product{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);}
.modal__product .media{height:100%;min-height:280px;background:var(--ivory);}
.modal__product-body{padding:38px 36px;}

/* ---------- 20. REVEAL ANIMATION ---------- */
.reveal{opacity:0;transform:translateY(22px);
  transition:opacity .8s var(--ease),transform .8s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
.reveal[data-delay="1"]{transition-delay:.08s;}
.reveal[data-delay="2"]{transition-delay:.16s;}
.reveal[data-delay="3"]{transition-delay:.24s;}

/* ---------- 21. RESPONSIVE ---------- */
@media (max-width:1080px){
  .products{grid-template-columns:repeat(2,1fr);}
  .principles{grid-template-columns:repeat(2,1fr);}
  .footer__grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:900px){
  .nav__links{display:none;}
  .nav__cta .btn{display:none;}
  .burger{display:flex;}
  .hero{padding-top:110px;}
  .hero__grid,.intro__grid,.science__grid,.contact__grid,.split{grid-template-columns:1fr;}
  .hero__copy{max-width:none;}
  .feature{grid-template-columns:1fr;}
  .feature--flip .feature__media{order:0;}
  .steps{grid-template-columns:1fr;gap:26px;}
  .collage{grid-template-columns:1fr;}
  .collage__main,.collage__side{grid-column:auto;}
  .collage__side{flex-direction:row;}
  .collage__side>*{flex:1;}
  .modal__product{grid-template-columns:1fr;}
  .modal__product .media{min-height:0;aspect-ratio:4/3;}
  .modal__product-body{padding:28px 24px 32px;}
}
@media (max-width:640px){
  body{font-size:16px;}
  .products{grid-template-columns:1fr;}
  .principles{grid-template-columns:1fr;}
  .footer__grid{grid-template-columns:1fr;}
  .section-head{flex-direction:column;align-items:flex-start;}
  .collage__side{flex-direction:column;}
  .banner{min-height:440px;}
  .banner .media::before{background:linear-gradient(180deg,rgba(28,32,27,.35) 0%,rgba(28,32,27,.75) 100%);}
  .modal__panel{padding:28px 22px;}
}

/* ---------- 22. REDUCED MOTION ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;scroll-behavior:auto!important;
  }
  .reveal{opacity:1;transform:none;}
}