/* =========================================================================
   Peptide Balance — styles
   Tokens · base · header · hero+figure · sections · shop · cart · footer
   · motion layer · reduced-motion + responsive
   Palette: white surfaces, blue + light-blue accents.
   ========================================================================= */

:root {
  --blue:      #2563eb;   /* primary */
  --blue-deep: #1d4ed8;
  --blue-royal:#1e40af;
  --sky:       #3b82f6;
  --sky-light: #60a5fa;
  --ice:       #bfdbfe;
  --ice-bg:    #eff6ff;

  --ink:   #0b1220;
  --ink-2: #354154;
  --muted: #6b7688;
  --line:  #e6ebf3;
  --white: #ffffff;
  --paper: #f8fafd;

  --grad: linear-gradient(120deg, var(--sky-light), var(--blue-deep));
  --grad-soft: linear-gradient(120deg, #eaf2ff, #dbeafe);

  --shadow-sm: 0 2px 8px rgba(20,50,110,.06);
  --shadow:    0 12px 34px rgba(20,50,110,.10);
  --shadow-lg: 0 30px 70px rgba(20,50,110,.16);

  --r: 16px;
  --r-lg: 24px;
  --ease: cubic-bezier(.16,1,.3,1);
  --wrap: 1180px;
  --hdr-h: 68px;

  --font: "Inter", system-ui, -apple-system, sans-serif;
  --display: "Space Grotesk", "Inter", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body.no-scroll { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.view[hidden] { display: none; }

/* ---------- buttons ---------- */
.btn {
  --pad: .8rem 1.3rem;
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: var(--pad); border-radius: 999px; border: 1px solid transparent;
  font: 600 .95rem/1 var(--font); cursor: pointer; white-space: nowrap;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s, color .3s;
}
.btn--primary { background: var(--grad); color: #fff; box-shadow: 0 8px 22px rgba(37,99,235,.32); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 14px 32px rgba(37,99,235,.42); }
.btn--ghost { background: #fff; color: var(--blue-deep); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--sky-light); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.btn--sm { --pad: .55rem .95rem; font-size: .85rem; }
.btn--lg { --pad: 1rem 1.8rem; font-size: 1.05rem; }
.btn--block { width: 100%; }

/* ---------- header ---------- */
.hdr {
  position: sticky; top: 0; z-index: 60;
  height: var(--hdr-h);
  display: flex; align-items: center; gap: 1.5rem;
  padding: 0 clamp(1rem, 4vw, 2.4rem);
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: .6rem; }
.brand__mark { width: 34px; height: 34px; }
.brand__name { font: 700 1.18rem/1 var(--display); letter-spacing: -.01em; color: var(--ink); }
.brand__name span { color: var(--blue); }
.nav { display: flex; gap: .3rem; margin-left: .5rem; }
.nav a {
  padding: .5rem .85rem; border-radius: 999px; font-weight: 500; color: var(--ink-2);
  transition: background .2s, color .2s;
}
.nav a:hover { background: var(--ice-bg); color: var(--blue-deep); }
.nav a.is-active { color: var(--blue-deep); background: var(--ice-bg); }
.hdr__right { margin-left: auto; display: flex; align-items: center; gap: .6rem; }

.cart-toggle {
  position: relative; display: grid; place-items: center;
  width: 42px; height: 42px; border-radius: 12px;
  background: #fff; border: 1px solid var(--line); color: var(--blue-deep); cursor: pointer;
  transition: border-color .2s, transform .2s;
}
.cart-toggle:hover { border-color: var(--sky-light); }
.cart-toggle__n {
  position: absolute; top: -6px; right: -6px; min-width: 19px; height: 19px; padding: 0 5px;
  background: var(--grad); color: #fff; border-radius: 999px;
  font: 700 .7rem/19px var(--font); text-align: center;
}
.cart-toggle--pop { animation: pop .4s var(--ease); }
@keyframes pop { 0%{transform:scale(1)} 40%{transform:scale(1.18)} 100%{transform:scale(1)} }

.burger { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 12px; background: #fff; cursor: pointer; flex-direction: column; gap: 4px; align-items: center; justify-content: center; }
.burger span { width: 18px; height: 2px; background: var(--ink); border-radius: 2px; transition: .3s; }
body.nav-open .burger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
body.nav-open .burger span:nth-child(2) { opacity: 0; }
body.nav-open .burger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* =========================================================================
   HERO
   ========================================================================= */
.hero {
  position: relative; overflow: hidden;
  min-height: calc(100svh - var(--hdr-h));
  display: flex; align-items: center;
  background:
    radial-gradient(120% 90% at 85% 0%, #eef5ff 0%, rgba(255,255,255,0) 60%),
    radial-gradient(90% 80% at 0% 100%, #f0f6ff 0%, rgba(255,255,255,0) 55%),
    #fff;
}
.hero__canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero__glow {
  position: absolute; width: 620px; height: 620px; right: -120px; top: -140px; z-index: 0;
  background: radial-gradient(circle, rgba(96,165,250,.28), rgba(96,165,250,0) 62%);
  filter: blur(10px); pointer-events: none;
}
.hero__inner {
  position: relative; z-index: 2; width: 100%; max-width: var(--wrap);
  margin: 0 auto; padding: 3rem clamp(1rem, 4vw, 2.4rem);
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 2rem; align-items: center;
}
.kicker {
  display: inline-flex; align-items: center; gap: .5rem;
  font: 600 .8rem/1 var(--font); letter-spacing: .04em; text-transform: uppercase;
  color: var(--blue-deep); background: var(--ice-bg); border: 1px solid #dbe8ff;
  padding: .5rem .8rem; border-radius: 999px;
}
.kicker__i { flex: none; color: var(--blue); }
.hero__title {
  font: 700 clamp(2.4rem, 6vw, 4.4rem)/1.03 var(--display);
  letter-spacing: -.02em; margin: 1.1rem 0 1rem; max-width: 15ch;
}
.hero__sub { font-size: clamp(1rem, 1.4vw, 1.18rem); color: var(--ink-2); max-width: 46ch; }
.hero__cta { display: flex; gap: .8rem; flex-wrap: wrap; margin: 1.8rem 0 2rem; }
.hero__stats { list-style: none; display: flex; gap: 2.2rem; flex-wrap: wrap; }
.hero__stats strong { display: block; font: 700 1.7rem/1 var(--display); color: var(--blue-deep); }
.hero__stats span { font-size: .82rem; color: var(--muted); }

.hero__scroll { position: absolute; bottom: 22px; left: 50%; transform: translateX(-50%); z-index: 3; width: 24px; height: 40px; border: 2px solid var(--sky-light); border-radius: 14px; }
.hero__scroll span { position: absolute; top: 7px; left: 50%; width: 4px; height: 8px; margin-left: -2px; background: var(--blue); border-radius: 2px; animation: scrolldot 1.6s var(--ease) infinite; }
@keyframes scrolldot { 0%{opacity:0;transform:translateY(0)} 40%{opacity:1} 80%{opacity:0;transform:translateY(12px)} 100%{opacity:0} }

/* ---- anatomical figure ---- */
.figure { position: relative; justify-self: center; width: min(360px, 90%); aspect-ratio: 3/5; display: grid; place-items: center; }
.figure__ring {
  position: absolute; inset: 4% 8%; border-radius: 50%;
  border: 1px dashed rgba(37,99,235,.28);
  background: radial-gradient(circle at 50% 42%, rgba(96,165,250,.14), transparent 62%);
  animation: spin 26s linear infinite;
}
.figure__ring::before, .figure__ring::after {
  content: ""; position: absolute; border-radius: 50%; border: 1px solid rgba(96,165,250,.35);
}
.figure__ring::before { inset: 12%; }
.figure__ring::after { inset: 26%; border-style: dashed; }
@keyframes spin { to { transform: rotate(360deg); } }
.figure__svg { position: relative; z-index: 2; width: 78%; filter: drop-shadow(0 20px 40px rgba(29,78,216,.30));
  animation: figFloat 7s var(--ease) infinite; transform-origin: 50% 50%; }
@keyframes figFloat { 0%,100%{transform:translateY(0) scale(1)} 50%{transform:translateY(-10px) scale(1.012)} }
/* breathing — subtle chest rise via the whole silhouette */
.figure__core { transform-box: fill-box; transform-origin: center; animation: corePulse 3.4s var(--ease) infinite; }
@keyframes corePulse { 0%,100%{opacity:.55; transform:scale(.82)} 50%{opacity:1; transform:scale(1.12)} }
/* hands drift slightly, opposite phase for a living feel */
.figure__hand { transform-box: fill-box; transform-origin: 50% 20%; animation: handSway 4.6s var(--ease) infinite; }
.figure__hand--r { animation-delay: -2.3s; }
@keyframes handSway { 0%,100%{transform:rotate(-3deg) translateY(0)} 50%{transform:rotate(3deg) translateY(3px)} }
/* energy sparks rising along the spine */
.figure__spark { transform-box: view-box; opacity: 0; animation: sparkUp 3.6s linear infinite; }
.figure__spark--b { animation-delay: -1.8s; }
@keyframes sparkUp {
  0%   { transform: translate(0, 96px) scale(.6); opacity: 0; }
  12%  { opacity: 1; }
  50%  { transform: translate(0, 0) scale(1); opacity: 1; }
  88%  { opacity: 1; }
  100% { transform: translate(0, -96px) scale(.6); opacity: 0; }
}
.figure__lines { stroke-dasharray: 6 8; animation: dash 6s linear infinite; }
@keyframes dash { to { stroke-dashoffset: -140; } }
.figure__nodes circle { animation: nodepulse 2.4s var(--ease) infinite; transform-box: fill-box; transform-origin: center; }
.figure__nodes circle:nth-child(2n) { animation-delay: .5s; }
.figure__nodes circle:nth-child(3n) { animation-delay: 1s; }
@keyframes nodepulse { 0%,100%{opacity:.4; transform:scale(.7)} 50%{opacity:1; transform:scale(1.25)} }
.figure__label {
  position: absolute; z-index: 3; font: 600 .74rem/1 var(--font);
  color: var(--blue-deep); background: #fff; border: 1px solid #dbe8ff;
  padding: .35rem .6rem; border-radius: 999px; box-shadow: var(--shadow-sm);
  animation: floaty 5s var(--ease) infinite;
}
.figure__label--1 { top: 14%; right: -6%; }
.figure__label--2 { top: 46%; left: -10%; animation-delay: .8s; }
.figure__label--3 { bottom: 12%; right: -2%; animation-delay: 1.6s; }
@keyframes floaty { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }

/* ---------- marquee ---------- */
.marquee { overflow: hidden; border-block: 1px solid var(--line); background: var(--ice-bg); padding: .7rem 0; }
.marquee__track { display: flex; width: max-content; animation: marq 40s linear infinite; will-change: transform; }
.marquee__seq { display: inline-flex; align-items: center; flex: none; }
.marquee__seq b { font: 600 .95rem/1 var(--display); color: var(--blue-deep); padding: 0 .6rem; }
.marquee__seq i { color: var(--sky-light); font-style: normal; }
.marquee:hover .marquee__track { animation-play-state: paused; }
@keyframes marq { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* =========================================================================
   SECTIONS
   ========================================================================= */
section { position: relative; }
.section-head { max-width: 720px; margin: 0 auto clamp(2rem, 5vw, 3.4rem); text-align: center; }
.eyebrow { font: 600 .8rem/1 var(--font); letter-spacing: .14em; text-transform: uppercase; color: var(--blue); margin-bottom: .8rem; }
.section-head h2 { font: 700 clamp(1.8rem, 4vw, 2.8rem)/1.08 var(--display); letter-spacing: -.02em; }
.lead { color: var(--ink-2); font-size: 1.05rem; margin-top: .9rem; }

.science, .cats, .faq { max-width: var(--wrap); margin: 0 auto; padding: clamp(4rem, 9vw, 7rem) clamp(1rem, 4vw, 2.4rem); }

.sci-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; }
.sci { background: var(--white); border: 1px solid var(--line); border-radius: var(--r); padding: 1.6rem; box-shadow: var(--shadow-sm); transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .3s; }
.sci:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: #cfe0ff; }
.sci__ico { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 12px; background: var(--grad-soft); color: var(--blue-deep); font: 700 1rem/1 var(--display); margin-bottom: 1rem; }
.sci h3 { font: 600 1.1rem/1.2 var(--font); margin-bottom: .4rem; }
.sci p { color: var(--muted); font-size: .92rem; }

/* DNA divider */
.dna-band { position: relative; overflow: hidden; padding: clamp(3rem,7vw,5rem) 1rem; text-align: center; background: linear-gradient(120deg, #0b1a3a, #14306b 55%, #1d4ed8); color: #fff; }
.dna { display: flex; justify-content: center; gap: 10px; height: 90px; margin-bottom: 1.4rem; }
.dna span { position: relative; width: 4px; align-self: center; }
.dna span::before, .dna span::after { content: ""; position: absolute; left: 0; width: 9px; height: 9px; border-radius: 50%; }
.dna span::before { background: var(--sky-light); }
.dna span::after { background: var(--ice); }
.dna span { animation: helix 2.4s ease-in-out infinite; }
.dna span::before { animation: helixTop 2.4s ease-in-out infinite; }
.dna span::after { animation: helixBot 2.4s ease-in-out infinite; }
.dna span:nth-child(1){animation-delay:-.0s}.dna span:nth-child(2){animation-delay:-.1s}.dna span:nth-child(3){animation-delay:-.2s}.dna span:nth-child(4){animation-delay:-.3s}.dna span:nth-child(5){animation-delay:-.4s}.dna span:nth-child(6){animation-delay:-.5s}.dna span:nth-child(7){animation-delay:-.6s}.dna span:nth-child(8){animation-delay:-.7s}.dna span:nth-child(9){animation-delay:-.8s}.dna span:nth-child(10){animation-delay:-.9s}.dna span:nth-child(11){animation-delay:-1s}.dna span:nth-child(12){animation-delay:-1.1s}.dna span:nth-child(13){animation-delay:-1.2s}.dna span:nth-child(14){animation-delay:-1.3s}.dna span:nth-child(15){animation-delay:-1.4s}.dna span:nth-child(16){animation-delay:-1.5s}.dna span:nth-child(17){animation-delay:-1.6s}.dna span:nth-child(18){animation-delay:-1.7s}.dna span:nth-child(19){animation-delay:-1.8s}.dna span:nth-child(20){animation-delay:-1.9s}.dna span:nth-child(21){animation-delay:-2s}.dna span:nth-child(22){animation-delay:-2.1s}.dna span:nth-child(23){animation-delay:-2.2s}.dna span:nth-child(24){animation-delay:-2.3s}
@keyframes helix { 0%,100%{height:14px} 50%{height:74px} }
@keyframes helixTop { 0%,100%{top:-9px; opacity:.4} 50%{top:0; opacity:1} }
@keyframes helixBot { 0%,100%{bottom:-9px; opacity:1} 50%{bottom:0; opacity:.4} }
.dna-band__txt { font: 600 clamp(1.2rem,3vw,1.9rem)/1.2 var(--display); letter-spacing: -.01em; }

/* categories */
.cats__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.catcard { position: relative; overflow: hidden; background: var(--white); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1.8rem; box-shadow: var(--shadow-sm); transition: transform .4s var(--ease), box-shadow .4s var(--ease); }
.catcard::after { content: ""; position: absolute; inset: 0; background: var(--grad); opacity: 0; transition: opacity .35s; }
.catcard:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.catcard__i { display: inline-grid; place-items: center; width: 48px; height: 48px; border-radius: 14px; background: var(--grad-soft); color: var(--blue-deep); font-size: 1.4rem; margin-bottom: 1rem; }
.catcard h3 { font: 600 1.25rem/1.2 var(--font); margin-bottom: .3rem; }
.catcard p { color: var(--muted); font-size: .9rem; }

/* faq */
.faq__list { max-width: 760px; margin: 0 auto; display: grid; gap: .8rem; }
.faq details { border: 1px solid var(--line); border-radius: var(--r); background: var(--white); padding: 0 1.3rem; box-shadow: var(--shadow-sm); transition: border-color .3s; }
.faq details[open] { border-color: #cfe0ff; }
.faq summary { list-style: none; cursor: pointer; padding: 1.2rem 0; font-weight: 600; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.4rem; color: var(--blue); transition: transform .3s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 0 1.2rem; color: var(--ink-2); }

/* cta band */
.cta-band { max-width: var(--wrap); margin: 0 auto clamp(4rem,8vw,6rem); padding: clamp(3rem,6vw,4.5rem) 1.5rem; text-align: center; border-radius: var(--r-lg); background: var(--grad); color: #fff; box-shadow: var(--shadow-lg); }
.cta-band h2 { font: 700 clamp(1.8rem,4vw,2.8rem)/1.1 var(--display); }
.cta-band p { opacity: .92; margin: .8rem 0 1.8rem; }
.cta-band .btn--primary { background: #fff; color: var(--blue-deep); box-shadow: 0 10px 30px rgba(0,0,0,.2); }

/* =========================================================================
   SHOP
   ========================================================================= */
.shop { max-width: var(--wrap); margin: 0 auto; padding: clamp(2.4rem, 5vw, 4rem) clamp(1rem, 4vw, 2.4rem) 5rem; }
.shop__head { text-align: center; max-width: 680px; margin: 0 auto 2rem; }
.shop__head h1 { font: 700 clamp(2rem,5vw,3.2rem)/1.05 var(--display); letter-spacing: -.02em; }
.shop__filters { display: flex; flex-wrap: wrap; gap: .55rem; justify-content: center; margin-bottom: 2.2rem; }
.chip { display: inline-flex; align-items: center; gap: .45rem; padding: .55rem .95rem; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--ink-2); font: 600 .88rem/1 var(--font); cursor: pointer; transition: .25s var(--ease); }
.chip:hover { border-color: var(--sky-light); color: var(--blue-deep); }
.chip--on { background: var(--grad); color: #fff; border-color: transparent; box-shadow: 0 6px 16px rgba(37,99,235,.3); }
.chip__n { font-size: .72rem; opacity: .7; background: rgba(0,0,0,.06); padding: .05rem .4rem; border-radius: 999px; }
.chip--on .chip__n { background: rgba(255,255,255,.24); opacity: 1; }

.shop__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.3rem; }
.card { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--shadow-sm); transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .3s; }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: #cfe0ff; }
.card__media { position: relative; aspect-ratio: 1/1; display: grid; place-items: center; overflow: hidden; background: #fff; border-bottom: 1px solid var(--line); }
/* gradient/monogram placeholder — sits behind the photo, shows if photo missing */
.card__ph { position: absolute; inset: 0; display: grid; place-items: center; }
.card__mono { font: 700 2.4rem/1 var(--display); color: rgba(255,255,255,.96); letter-spacing: .02em; text-shadow: 0 3px 14px rgba(0,0,0,.18); }
.card__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; background: #fff; padding: 6%; transition: transform .5s var(--ease); }
.card:hover .card__img { transform: scale(1.04); }
.card__tag { position: absolute; top: .7rem; left: .7rem; z-index: 2; font: 600 .68rem/1 var(--font); text-transform: uppercase; letter-spacing: .06em; color: var(--blue-deep); background: rgba(219,234,255,.72); border: 1px solid #cfe0ff; backdrop-filter: blur(4px); padding: .3rem .55rem; border-radius: 999px; }
.card__body { padding: 1.1rem 1.1rem .4rem; flex: 1; }
.card__name { font: 600 1.08rem/1.2 var(--font); }
.card__dose { color: var(--blue-deep); font: 600 .82rem/1 var(--font); margin: .35rem 0 .6rem; }
/* size tabs (GHK-Cu 50 / 100 mg) */
.vtabs { display: inline-flex; gap: .3rem; margin: .5rem 0 .6rem; background: var(--ice-bg); border: 1px solid var(--line); border-radius: 999px; padding: .18rem; }
.vtab { border: none; background: none; cursor: pointer; font: 600 .76rem/1 var(--font); color: var(--ink-2); padding: .34rem .7rem; border-radius: 999px; transition: background .25s, color .25s; }
.vtab--on { background: var(--grad); color: #fff; box-shadow: 0 3px 8px rgba(37,99,235,.28); }
.card__blurb { color: var(--muted); font-size: .86rem; }
.card__foot { display: flex; align-items: center; justify-content: space-between; gap: .6rem; padding: 1rem 1.1rem 1.2rem; }
.card__price { font: 700 1.15rem/1.1 var(--display); color: var(--ink); }
.add.btn { background: var(--grad); color: #fff; border: none; }
.add.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 18px rgba(37,99,235,.34); }
.shop__note { text-align: center; color: var(--muted); font-size: .82rem; margin-top: 2.4rem; }

/* =========================================================================
   CART DRAWER
   ========================================================================= */
.scrim { position: fixed; inset: 0; z-index: 90; background: rgba(11,18,32,.42); opacity: 0; pointer-events: none; transition: opacity .35s var(--ease); backdrop-filter: blur(2px); }
.scrim.is-open { opacity: 1; pointer-events: auto; }
.cart { position: fixed; top: 0; right: 0; z-index: 100; width: min(420px, 100%); height: 100%; background: #fff; box-shadow: var(--shadow-lg); transform: translateX(100%); transition: transform .4s var(--ease); display: flex; flex-direction: column; }
.cart.is-open { transform: none; }
.cart__head { display: flex; align-items: center; justify-content: space-between; padding: 1.3rem 1.4rem; border-bottom: 1px solid var(--line); }
.cart__head h2 { font: 700 1.2rem/1 var(--display); }
.cart__close { width: 34px; height: 34px; border-radius: 10px; border: 1px solid var(--line); background: #fff; cursor: pointer; font-size: 1rem; color: var(--ink-2); }
.cart__close:hover { border-color: var(--sky-light); color: var(--blue-deep); }
.cart__empty { padding: 2.4rem 1.4rem; color: var(--muted); }
.cart__empty a { color: var(--blue); font-weight: 600; }
.cart__items { list-style: none; flex: 1; overflow-y: auto; padding: .6rem 1.4rem; }
.cart-item { display: grid; grid-template-columns: 52px 1fr auto; gap: .8rem; padding: 1rem 0; border-bottom: 1px solid var(--line); }
.cart-item__thumb { position: relative; width: 52px; height: 52px; border-radius: 12px; overflow: hidden; display: grid; place-items: center; color: #fff; font: 700 1rem/1 var(--display); }
.cart-item__thumb img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; background: #fff; padding: 2px; }
.cart-item__mono { position: relative; }
.cart-item__name { font-weight: 600; font-size: .95rem; }
.cart-item__meta { color: var(--muted); font-size: .82rem; margin-bottom: .5rem; }
.qty { display: inline-flex; align-items: center; gap: .2rem; border: 1px solid var(--line); border-radius: 999px; padding: .12rem; }
.qty__btn { width: 26px; height: 26px; border: none; background: var(--ice-bg); color: var(--blue-deep); border-radius: 50%; cursor: pointer; font-size: 1rem; line-height: 1; display: grid; place-items: center; }
.qty__btn:hover { background: var(--ice); }
.qty__n { min-width: 26px; text-align: center; font-weight: 600; font-size: .9rem; }
.cart-item__right { text-align: right; display: flex; flex-direction: column; align-items: flex-end; justify-content: space-between; }
.cart-item__line { font-weight: 700; }
.cart-item__x { border: none; background: none; color: var(--muted); font-size: .78rem; cursor: pointer; text-decoration: underline; }
.cart-item__x:hover { color: #ef4444; }
.cart__foot { border-top: 1px solid var(--line); padding: 1.2rem 1.4rem 1.4rem; }
.cart__totals { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: .3rem; }
.cart__totals strong { font: 700 1.5rem/1 var(--display); }
.cart__fine { color: var(--muted); font-size: .76rem; margin-bottom: .9rem; }

/* =========================================================================
   FOOTER
   ========================================================================= */
.foot { background: var(--paper); border-top: 1px solid var(--line); padding: clamp(2.6rem,5vw,3.6rem) clamp(1rem,4vw,2.4rem) 2rem; }
.foot__top { max-width: var(--wrap); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; padding-bottom: 1.6rem; border-bottom: 1px solid var(--line); }
.foot__brand { display: flex; align-items: center; gap: .6rem; }
.foot__nav { display: flex; gap: 1.4rem; flex-wrap: wrap; }
.foot__nav a { color: var(--ink-2); font-weight: 500; font-size: .92rem; }
.foot__nav a:hover { color: var(--blue-deep); }
.foot__disc { max-width: var(--wrap); margin: 1.4rem auto 0; }
.foot__disc p { color: var(--muted); font-size: .82rem; max-width: 70ch; }
.foot__disc strong { color: var(--ink-2); }
.foot__copy { margin-top: .8rem; }
.foot__copy a { color: var(--blue); }

/* =========================================================================
   MOTION LAYER — scroll reveal
   ========================================================================= */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease), transform .7s var(--ease); transition-delay: calc(var(--i, 0) * 70ms); }
.reveal.is-in { opacity: 1; transform: none; }

/* =========================================================================
   RESPONSIVE
   ========================================================================= */
@media (max-width: 980px) {
  .hero__inner { grid-template-columns: 1fr; }
  .figure { order: -1; width: min(300px, 80%); }
  .figure__label { display: none; }
  .sci-grid { grid-template-columns: repeat(2, 1fr); }
  .cats__grid { grid-template-columns: repeat(2, 1fr); }
  .shop__grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 760px) {
  .nav, .hdr__shopcta { display: none; }
  .burger { display: flex; }
  body.nav-open .nav {
    display: flex; flex-direction: column; position: fixed; top: var(--hdr-h); left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line); padding: 1rem; gap: .3rem; z-index: 55; box-shadow: var(--shadow);
  }
  .shop__grid { grid-template-columns: repeat(2, 1fr); }
  .hero__stats { gap: 1.4rem; }
}
@media (max-width: 480px) {
  .sci-grid, .cats__grid, .shop__grid { grid-template-columns: 1fr; }
  .hero__title { font-size: 2.3rem; }
  .card__media { aspect-ratio: 16/10; }
}

/* =========================================================================
   REDUCED MOTION
   ========================================================================= */
@media (prefers-reduced-motion: reduce) {
  /* Kill entrance/scroll motion for accessibility, but keep the ambient,
     non-flashing brand animations (DNA canvas, figure, marquee) — these are
     decorative and requested. */
  html { scroll-behavior: auto !important; }
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  .hero__scroll span { animation: none !important; }
}

/* =========================================================================
   HEADER SEARCH + THEME TOGGLE
   ========================================================================= */
.hdr__search {
  display: inline-flex; align-items: center; gap: .45rem;
  background: var(--ice-bg); border: 1px solid var(--line); border-radius: 999px;
  padding: .34rem .7rem; color: var(--muted); transition: border-color .2s, background .2s;
}
.hdr__search:focus-within { border-color: var(--sky-light); background: var(--white); }
.hdr__search svg { flex: none; color: var(--muted); }
.hdr__search input {
  border: none; background: none; outline: none; width: 150px;
  font: 500 .9rem/1 var(--font); color: var(--ink);
}
.hdr__search input::placeholder { color: var(--muted); }

.icon-btn {
  display: grid; place-items: center; width: 42px; height: 42px; border-radius: 12px;
  background: var(--white); border: 1px solid var(--line); color: var(--blue-deep); cursor: pointer;
  transition: border-color .2s, transform .2s, background .2s;
}
.icon-btn:hover { border-color: var(--sky-light); transform: translateY(-1px); }
.icon-btn .icon-moon { display: none; }
[data-theme="dark"] .icon-btn .icon-sun { display: none; }
[data-theme="dark"] .icon-btn .icon-moon { display: block; }

/* shop empty state */
.shop__empty { grid-column: 1 / -1; text-align: center; color: var(--muted); padding: 2.6rem 1rem; font-size: 1rem; }
.link { border: none; background: none; color: var(--blue); font: inherit; font-weight: 600; cursor: pointer; text-decoration: underline; }

/* =========================================================================
   CONTACT
   ========================================================================= */
.contact { max-width: var(--wrap); margin: 0 auto; padding: 4rem clamp(1rem, 4vw, 2.4rem) 5rem; }
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2.6rem; align-items: start; }
.contact__intro .lead { margin-top: .8rem; }
.contact__list { list-style: none; margin-top: 1.8rem; display: grid; gap: .9rem; }
.contact__list li { display: grid; grid-template-columns: 84px 1fr; align-items: baseline; gap: 1rem; padding-bottom: .9rem; border-bottom: 1px solid var(--line); color: var(--ink-2); }
.contact__list span { color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; }
.contact__list a { color: var(--blue); font-weight: 600; }
.contact__form { background: var(--white); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1.8rem; box-shadow: var(--shadow-sm); }
.field { margin-bottom: 1.1rem; }
.field label { display: block; font-weight: 600; font-size: .84rem; color: var(--ink-2); margin-bottom: .4rem; }
.field input, .field textarea {
  width: 100%; font: 500 .95rem/1.5 var(--font); color: var(--ink);
  background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: .7rem .85rem;
  transition: border-color .2s, box-shadow .2s; resize: vertical;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--sky-light); box-shadow: 0 0 0 3px rgba(96,165,250,.2); }
.contact__ok { margin-top: .9rem; color: var(--blue-deep); font-weight: 600; font-size: .9rem; }
.contact__fine { margin-top: .8rem; color: var(--muted); font-size: .78rem; }
@media (max-width: 820px) { .contact__grid { grid-template-columns: 1fr; gap: 1.8rem; } }
@media (max-width: 900px) { .hdr__search { display: none; } }

/* =========================================================================
   DARK MODE — #1e1e1e base
   ========================================================================= */
:root[data-theme="dark"] {
  --ink:   #f3f5f9;
  --ink-2: #c7ced9;
  --muted: #95a0b1;
  --line:  #333438;
  --white: #262629;   /* raised surfaces: cards, header, cart */
  --paper: #1e1e1e;   /* page background */
  --ice:    #26364f;
  --ice-bg: #1f2a3d;
  --grad-soft: linear-gradient(120deg, #22304a, #1c2740);
  --shadow-sm: 0 2px 8px rgba(0,0,0,.45);
  --shadow:    0 12px 34px rgba(0,0,0,.55);
  --shadow-lg: 0 30px 70px rgba(0,0,0,.6);
}
[data-theme="dark"] body { background: #1e1e1e; }
[data-theme="dark"] .hdr { background: rgba(30,30,30,.82); }
[data-theme="dark"] .hero {
  background:
    radial-gradient(120% 90% at 85% 0%, #222b3d 0%, rgba(30,30,30,0) 60%),
    radial-gradient(90% 80% at 0% 100%, #202634 0%, rgba(30,30,30,0) 55%),
    #1e1e1e;
}
[data-theme="dark"] .cart-toggle,
[data-theme="dark"] .btn--ghost,
[data-theme="dark"] .burger { background: var(--white); }
[data-theme="dark"] .burger span { background: var(--ink); }
[data-theme="dark"] .card { background: var(--white); }
/* keep product photos on white so vials read correctly */
[data-theme="dark"] .card__media { background: #f4f6fa; border-bottom-color: var(--line); }
[data-theme="dark"] .card__img { background: #ffffff; }
/* keep the category tag on its light styling — it sits on the white product photo */
[data-theme="dark"] .cart { background: #201f22; }
[data-theme="dark"] .cart-item__thumb img,
[data-theme="dark"] .cart-item__thumb { background: #f4f6fa; }
[data-theme="dark"] .marquee { background: #191919; border-color: var(--line); }
[data-theme="dark"] .dna-band { background: #191b1f; }
[data-theme="dark"] .cta-band { background: linear-gradient(120deg, #1b2942, #16203a); }
[data-theme="dark"] .foot { background: #191919; }
[data-theme="dark"] .hero__glow { background: radial-gradient(circle, rgba(96,165,250,.16), rgba(96,165,250,0) 62%); }
[data-theme="dark"] .figure__label { background: #262629; border-color: var(--line); color: #cfe0ff; }
[data-theme="dark"] em { filter: brightness(1.15); }

/* dark-mode font/color corrections */
[data-theme="dark"] .sci__ico,
[data-theme="dark"] .catcard__i { color: #bcd3ff; }
[data-theme="dark"] .card__dose { color: var(--sky-light); }
[data-theme="dark"] .marquee__seq b { color: #8fb4ff; }
[data-theme="dark"] .marquee__seq i { color: #5b78ad; }
[data-theme="dark"] .eyebrow { color: var(--sky-light); }
[data-theme="dark"] .kicker { background: var(--ice-bg); border-color: #2e3b52; color: #bcd3ff; }
[data-theme="dark"] .faq summary::after,
[data-theme="dark"] .faq details[open] { color: var(--sky-light); }
[data-theme="dark"] .faq details[open] { border-color: #33507e; }
[data-theme="dark"] .chip { background: var(--white); border-color: var(--line); color: var(--ink-2); }
[data-theme="dark"] .chip__n { background: rgba(255,255,255,.08); }
[data-theme="dark"] .hero__scroll { border-color: #3a4a66; }
[data-theme="dark"] .btn--ghost { color: #cfe0ff; }
[data-theme="dark"] .field input,
[data-theme="dark"] .field textarea { background: #1b1b1e; }