/* ============================================================
   FORM PRECISION LABS — design system
   Premium minimalist lab aesthetic. Flat light-grey surfaces.
   ============================================================ */

:root {
  --bg:        #E6E6E6;
  --surface:   #EFEFEF;
  --card:      #F4F4F4;
  --ink:       #1A1A1A;
  --muted:     #6E6E6E;
  --line:      #CCCCCC;
  --accent:    #1A1A1A;
  --white:     #FFFFFF;

  --container: 1320px;
  --pad: clamp(24px, 5vw, 80px);
  --section: clamp(80px, 12vh, 160px);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-display: "Cormorant Garamond", Georgia, serif;
  --font-sans: "Inter Tight", -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul { list-style: none; }

body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  font-weight: 400;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  position: relative;
  overflow-x: hidden;
}

/* flat surfaces — no noise overlay */

/* ---------- layout ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
  width: 100%;
}
.section { padding-top: var(--section); padding-bottom: var(--section); }
.section--tight { padding-top: clamp(56px, 8vh, 100px); padding-bottom: clamp(56px, 8vh, 100px); }

/* ---------- typography ---------- */
.eyebrow {
  font-family: var(--font-sans);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 11px;
  color: var(--muted);
  line-height: 1.4;
}
.display-hero {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  font-size: clamp(56px, 8.5vw, 88px);
  line-height: 1.0;
  letter-spacing: -0.01em;
}
.h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.005em;
}
.h1--italic { font-style: italic; }
.h2 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.lead {
  font-size: clamp(17px, 1.4vw, 19px);
  line-height: 1.6;
  color: var(--muted);
}
.small { font-size: 13px; font-weight: 500; line-height: 1.5; }
.muted { color: var(--muted); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  height: 56px;
  padding: 0 32px;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: -0.01em;
  transition: all 400ms var(--ease);
  white-space: nowrap;
}
.btn--primary { background: var(--ink); color: var(--white); }
.btn--primary:hover { background: #000; transform: translateY(-2px); }
.btn--secondary { border: 1px solid var(--ink); color: var(--ink); background: transparent; }
.btn--secondary:hover { background: var(--ink); color: var(--white); transform: translateY(-2px); }
.btn--sm { height: 46px; padding: 0 24px; font-size: 14px; }
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-weight: 500;
  font-size: 15px;
  letter-spacing: -0.01em;
  transition: gap 400ms var(--ease);
}
.link-arrow:hover { gap: 0.85em; }

/* ---------- pills / badges ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card);
  font-size: 13px;
  font-weight: 500;
  transition: all 400ms var(--ease);
}
.pill:hover { border-color: var(--ink); transform: translateY(-2px); }
.badge-new {
  display: inline-block;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--white);
  vertical-align: middle;
  margin-left: 6px;
}
.dot-stock {
  display: inline-block;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #4a7c59;
  margin-right: 6px;
  vertical-align: middle;
}

/* ============================================================
   HEADER
   ============================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(239, 239, 239, 0.85);
  backdrop-filter: saturate(1.4) blur(16px);
  -webkit-backdrop-filter: saturate(1.4) blur(16px);
  border-bottom: 1px solid var(--line);
}
.header__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 76px;
}
.header__nav { display: flex; gap: 32px; }
.header__nav a {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  position: relative;
  transition: color 400ms var(--ease);
}
.header__nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -4px;
  width: 0; height: 1px;
  background: var(--ink);
  transition: width 400ms var(--ease);
}
.header__nav a:hover::after { width: 100%; }
.logo-f {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: 36px;
  line-height: 1;
  text-align: center;
  display: inline-block;
  /* Optical centering: Cormorant italic 'f' has a tall ascender and short descender,
     which makes it sit visually high inside a flex-centered container. Nudge down. */
  transform: translateY(2px);
}
.header__actions { display: flex; gap: 22px; justify-content: flex-end; align-items: center; }
.icon-btn { display: inline-flex; align-items: center; color: var(--ink); position: relative; transition: opacity 400ms var(--ease); }
.icon-btn:hover { opacity: 0.6; }
.icon-btn svg { width: 19px; height: 19px; }
.cart-badge {
  position: absolute;
  top: -6px; right: -8px;
  font-size: 9px;
  font-weight: 600;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
}
.menu-toggle { display: none; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--line);
  padding-top: clamp(60px, 8vh, 100px);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 60px;
}
.footer__logo { font-family: var(--font-display); font-style: italic; font-weight: 500; font-size: 56px; line-height: 1; }
.footer__tag { color: var(--muted); font-size: 15px; margin-top: 16px; max-width: 320px; line-height: 1.55; }
.footer__signup {
  display: flex;
  margin-top: 24px;
  max-width: 320px;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  background: var(--card);
}
.footer__signup input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 0 18px;
  font: inherit;
  font-size: 14px;
  color: var(--ink);
  outline: none;
}
.footer__signup input::placeholder { color: var(--muted); }
.footer__signup button {
  background: var(--ink);
  color: var(--white);
  padding: 13px 22px;
  font-size: 13px;
  font-weight: 500;
}
.footer__col h4 {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 18px;
}
.footer__col ul li { margin-bottom: 12px; }
.footer__col ul a { font-size: 15px; color: var(--ink); transition: color 400ms var(--ease); }
.footer__col ul a:hover { color: var(--muted); }
.footer__bottom {
  border-top: 1px solid var(--line);
  padding: 28px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  font-size: 12px;
  color: var(--muted);
}

/* ============================================================
   PRODUCT CARD
   ============================================================ */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }

.pcard {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 400ms var(--ease), border-color 400ms var(--ease);
  display: flex;
  flex-direction: column;
}
.pcard:hover { transform: translateY(-2px); border-color: #a8a39a; }
.pcard__img {
  aspect-ratio: 4/5;
  overflow: hidden;
  background: #ECE9E3;
}
.pcard__img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: filter 400ms var(--ease), transform 600ms var(--ease);
}
.pcard:hover .pcard__img img { filter: saturate(0.85); transform: scale(1.02); }
.pcard__body { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.pcard__cat { font-size: 10px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.pcard__name { font-family: var(--font-sans); font-weight: 600; font-size: 19px; letter-spacing: -0.02em; margin-top: 6px; }
.pcard__tag { font-size: 13.5px; color: var(--muted); margin-top: 4px; line-height: 1.45; }
.pcard__foot { margin-top: auto; padding-top: 18px; display: flex; align-items: flex-end; justify-content: space-between; }
.pcard__price { font-size: 16px; font-weight: 500; }
.pcard__sub { font-size: 11.5px; color: var(--muted); margin-top: 2px; }
.pcard__btn {
  font-size: 12px;
  font-weight: 500;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--ink);
  opacity: 0;
  transform: translateY(4px);
  transition: all 400ms var(--ease);
  white-space: nowrap;
}
.pcard:hover .pcard__btn { opacity: 1; transform: translateY(0); }
.pcard__btn:hover { background: var(--ink); color: var(--white); }
@media (hover: none) { .pcard__btn { opacity: 1; transform: none; } }

/* ============================================================
   SECTION HEADER (eyebrow + title + right link)
   ============================================================ */
.sec-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.sec-head__title { margin-top: 12px; }

/* ============================================================
   HERO (home)
   ============================================================ */
.hero { padding-top: clamp(48px, 7vh, 96px); padding-bottom: clamp(60px, 9vh, 120px); }
.hero__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}
.hero__sub { margin-top: 28px; max-width: 460px; }
.hero__cta { display: flex; align-items: center; gap: 28px; margin-top: 36px; flex-wrap: wrap; }
.hero__media {
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--card);
}
.hero__media img { width: 100%; aspect-ratio: 4/5; object-fit: cover; }
.hero__caption { font-size: 13px; color: var(--muted); margin-top: 16px; text-align: center; }

/* ============================================================
   FEATURES STRIP
   ============================================================ */
.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 36px; }
.feature { border-top: 1px solid var(--line); padding-top: 24px; }
.feature h3 { font-family: var(--font-sans); font-weight: 600; font-size: 17px; letter-spacing: -0.01em; }
.feature p { font-size: 14.5px; color: var(--muted); margin-top: 10px; line-height: 1.55; }

/* ============================================================
   EDITORIAL / FEATURE BLOCK
   ============================================================ */
.feature-block {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 28px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.feature-block__media { overflow: hidden; background: #ECE9E3; }
.feature-block__media img { width: 100%; height: 100%; object-fit: cover; min-height: 420px; }
.feature-block__body { padding: clamp(36px, 5vw, 72px); display: flex; flex-direction: column; justify-content: center; }
.feature-block__body .h1 { margin-top: 14px; }
.feature-block__body p { margin-top: 20px; color: var(--muted); max-width: 440px; }
.feature-block__cta { display: flex; align-items: center; gap: 24px; margin-top: 32px; flex-wrap: wrap; }
.feature-block__foot { font-size: 12.5px; color: var(--muted); margin-top: 24px; }

/* two-col approach */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 80px);
  align-items: center;
}
.media-card {
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--card);
}
.media-card img { width: 100%; object-fit: cover; }

/* ============================================================
   JOURNAL CARDS
   ============================================================ */
.jcard {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 28px 32px;
  display: flex;
  flex-direction: column;
  transition: transform 400ms var(--ease), border-color 400ms var(--ease);
  height: 100%;
}
.jcard:hover { transform: translateY(-2px); border-color: #a8a39a; }
.jcard__cat { font-size: 10px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.jcard__title { font-family: var(--font-display); font-weight: 500; font-size: 24px; line-height: 1.15; margin-top: 14px; }
.jcard__excerpt { font-size: 14.5px; color: var(--muted); margin-top: 14px; line-height: 1.55; flex: 1; }
.jcard__meta { font-size: 12px; color: var(--muted); margin-top: 22px; }

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.reveal { opacity: 0; transform: translateY(16px); filter: blur(8px); transition: opacity 700ms var(--ease), transform 700ms var(--ease), filter 700ms var(--ease); }
.reveal.in { opacity: 1; transform: none; filter: blur(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; filter: none !important; transition: none; }
  * { scroll-behavior: auto; }
}

/* ============================================================
   PDP
   ============================================================ */
.pdp-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 5vw, 72px); align-items: start; }
.pdp__media { border-radius: 28px; overflow: hidden; border: 1px solid var(--line); background: var(--card); position: sticky; top: 100px; }
.pdp__media img { width: 100%; aspect-ratio: 4/5; object-fit: cover; }
.pdp__topline { display: flex; align-items: center; gap: 16px; font-size: 12px; color: var(--muted); }
.pdp__topline .cat { letter-spacing: 0.1em; text-transform: uppercase; font-weight: 500; }
.pdp__name { margin-top: 18px; }
.pdp__priceline { display: flex; align-items: baseline; gap: 16px; margin-top: 20px; }
.pdp__price { font-size: 28px; font-weight: 500; }
.pdp__sub { font-size: 14px; color: var(--muted); }
.pdp__desc { margin-top: 22px; color: var(--muted); max-width: 480px; }
.size-chips { display: flex; gap: 10px; margin-top: 26px; }
.chip {
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card);
  font-size: 14px;
  font-weight: 500;
  transition: all 300ms var(--ease);
}
.chip.active, .chip:hover { border-color: var(--ink); background: var(--ink); color: var(--white); }
.pdp__buy { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }
.pdp__buy .btn { flex: 1; min-width: 200px; }
.trust-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px 28px; margin-top: 34px; padding-top: 30px; border-top: 1px solid var(--line); }
.trust { display: flex; gap: 12px; align-items: flex-start; }
.trust svg { width: 18px; height: 18px; flex-shrink: 0; margin-top: 2px; color: var(--ink); }
.trust strong { font-size: 14px; font-weight: 600; display: block; }
.trust span { font-size: 13px; color: var(--muted); }

/* ---------- accordion ---------- */
.accordions { margin-top: clamp(48px, 7vh, 80px); border-top: 1px solid var(--line); }
.acc { border-bottom: 1px solid var(--line); }
.acc__head {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  text-align: left;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.acc__icon { transition: transform 400ms var(--ease); font-size: 22px; font-weight: 300; line-height: 1; }
.acc.open .acc__icon { transform: rotate(45deg); }
.acc__body { max-height: 0; overflow: hidden; transition: max-height 500ms var(--ease); }
.acc__inner { padding-bottom: 26px; color: var(--muted); max-width: 720px; }
.acc__inner p { margin-bottom: 12px; }
.acc__inner ul { list-style: none; }
.acc__inner ul li { position: relative; padding-left: 20px; margin-bottom: 8px; }
.acc__inner ul li::before { content: ""; position: absolute; left: 0; top: 11px; width: 5px; height: 1px; background: var(--muted); }

/* ============================================================
   RETATRUTIDE LP specifics
   ============================================================ */
.lp-banner {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  text-align: center;
  padding: 10px var(--pad);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  position: relative;
  z-index: 201;
}
.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; margin-top: 38px; }
.stat__num { font-family: var(--font-display); font-weight: 500; font-size: 40px; line-height: 1; }
.stat__label { font-size: 11px; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin-top: 10px; }
.explainer { display: grid; grid-template-columns: repeat(3, 1fr); gap: 44px; margin-top: 56px; }
.explainer__item { border-top: 1px solid var(--line); padding-top: 22px; }
.explainer__num { font-family: var(--font-display); font-size: 30px; font-weight: 500; color: var(--muted); }
.explainer__title { font-weight: 600; font-size: 18px; margin-top: 8px; letter-spacing: -0.01em; }
.explainer__title small { display: block; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); font-weight: 500; margin-bottom: 4px; }
.explainer__item p { font-size: 14.5px; color: var(--muted); margin-top: 12px; line-height: 1.55; }

.coa-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 36px;
  font-family: var(--font-sans);
}
.coa-card h4 { font-size: 11px; font-weight: 600; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.coa-row { display: flex; justify-content: space-between; padding: 15px 0; border-bottom: 1px solid var(--line); font-size: 14.5px; }
.coa-row:last-child { border-bottom: none; }
.coa-row .k { color: var(--muted); }
.coa-row .v { font-weight: 500; }

.check-list { margin-top: 26px; display: grid; gap: 14px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; font-size: 15px; }
.check-list svg { width: 18px; height: 18px; flex-shrink: 0; margin-top: 2px; }

.cite-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: transform 400ms var(--ease), border-color 400ms var(--ease);
}
.cite-card:hover { transform: translateY(-2px); border-color: #a8a39a; }
.cite-card__label { font-family: var(--font-display); font-size: 24px; font-weight: 500; color: var(--muted); }
.cite-card__src { font-size: 11px; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin-top: 14px; }
.cite-card__title { font-size: 17px; font-weight: 600; letter-spacing: -0.01em; margin-top: 8px; line-height: 1.3; }
.cite-card__sum { font-size: 14px; color: var(--muted); margin-top: 12px; flex: 1; line-height: 1.5; }
.cite-card__link { margin-top: 20px; }

.cols-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 44px; }
.col-block h3 { font-weight: 600; font-size: 18px; letter-spacing: -0.01em; margin-bottom: 16px; }
.col-block ul li { position: relative; padding-left: 18px; margin-bottom: 10px; font-size: 14.5px; color: var(--muted); line-height: 1.5; }
.col-block ul li::before { content: ""; position: absolute; left: 0; top: 10px; width: 5px; height: 1px; background: var(--muted); }

/* sticky add-to-cart bar */
.sticky-buy {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%) translateY(140%);
  width: calc(100% - 2 * var(--pad));
  max-width: var(--container);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
  padding: 12px 14px 12px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  z-index: 150;
  transition: transform 500ms var(--ease);
}
.sticky-buy.show { transform: translateX(-50%) translateY(0); }
.sticky-buy__left { display: flex; align-items: center; gap: 20px; }
.sticky-buy__name { font-weight: 600; font-size: 16px; letter-spacing: -0.01em; }
.sticky-buy__toggle { display: flex; gap: 6px; }
.sticky-buy__toggle .chip { padding: 7px 14px; font-size: 13px; }
.sticky-buy__right { display: flex; align-items: center; gap: 20px; }
.sticky-buy__price { font-size: 15px; font-weight: 500; white-space: nowrap; }
.sticky-buy__price span { color: var(--muted); font-weight: 400; }

/* email capture */
.email-capture {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: clamp(40px, 6vw, 72px);
  text-align: center;
}
.email-capture__form { display: flex; max-width: 460px; margin: 28px auto 0; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; background: var(--bg); }
.email-capture__form input { flex: 1; border: none; background: transparent; padding: 0 22px; font: inherit; font-size: 15px; outline: none; color: var(--ink); }
.email-capture__form button { background: var(--ink); color: var(--white); padding: 16px 28px; font-size: 14px; font-weight: 500; }
.email-capture__foot { font-size: 12.5px; color: var(--muted); margin-top: 18px; }

/* ============================================================
   PAGE HEADER (interior pages)
   ============================================================ */
.page-head { padding-top: clamp(56px, 8vh, 110px); padding-bottom: clamp(40px, 6vh, 72px); }
.page-head .h1 { margin-top: 14px; }
.page-head .lead { margin-top: 20px; max-width: 560px; }

/* filter tabs */
.filter-tabs { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 36px; }
.tab {
  padding: 9px 20px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card);
  font-size: 13.5px;
  font-weight: 500;
  transition: all 300ms var(--ease);
}
.tab.active, .tab:hover { border-color: var(--ink); background: var(--ink); color: var(--white); }

/* ============================================================
   ARTICLE
   ============================================================ */
.article { max-width: 680px; margin: 0 auto; }
.article__meta { font-size: 13px; color: var(--muted); margin-top: 22px; display: flex; gap: 16px; flex-wrap: wrap; }
.article__body { margin-top: 44px; }
.article__body p { font-size: 19px; line-height: 1.7; margin-bottom: 26px; }
.article__body h2 { font-family: var(--font-display); font-weight: 500; font-size: 32px; line-height: 1.2; margin: 44px 0 20px; }
.article__lead { font-size: 22px !important; line-height: 1.5 !important; color: var(--muted); font-family: var(--font-display); font-style: italic; }

/* info cards (research page) */
.info-card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 32px; }
.info-card h3 { font-weight: 600; font-size: 19px; letter-spacing: -0.01em; margin-bottom: 18px; }
.info-card ul li { position: relative; padding-left: 18px; margin-bottom: 10px; font-size: 14.5px; color: var(--muted); line-height: 1.5; }
.info-card ul li::before { content: ""; position: absolute; left: 0; top: 10px; width: 5px; height: 1px; background: var(--muted); }

.cta-block { background: var(--ink); color: var(--white); border-radius: 28px; padding: clamp(48px, 7vw, 88px); text-align: center; }
.cta-block .eyebrow { color: rgba(255,255,255,0.6); }
.cta-block .h1 { color: var(--white); margin-top: 14px; }
.cta-block p { color: rgba(255,255,255,0.75); max-width: 480px; margin: 20px auto 0; }
.cta-block .btn--primary { background: var(--white); color: var(--ink); margin-top: 32px; }
.cta-block .btn--primary:hover { background: #f0f0f0; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stat-row { grid-template-columns: repeat(4, 1fr); gap: 16px; }
  .stat__num { font-size: 32px; }
}
@media (max-width: 768px) {
  .header__nav { display: none; }
  /* Equal-width left + right columns so the center column truly centers */
  .header__inner { grid-template-columns: 1fr auto 1fr; }
  .menu-toggle { display: inline-flex; justify-self: start; }
  .logo-f { text-align: center; justify-self: center; }
  .header__actions { gap: 16px; justify-self: end; }

  .hero__grid { grid-template-columns: 1fr; }
  .hero__media { order: -1; }
  .features { grid-template-columns: 1fr 1fr; gap: 28px; }
  .feature-block { grid-template-columns: 1fr; }
  .feature-block__media img { min-height: 320px; }
  .two-col { grid-template-columns: 1fr; }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .footer__col--brand { grid-column: 1 / -1; }
  .pdp-grid { grid-template-columns: 1fr; }
  .pdp__media { position: static; }
  .explainer { grid-template-columns: 1fr; gap: 32px; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .cols-3 { grid-template-columns: 1fr; gap: 32px; }
  .trust-row { grid-template-columns: 1fr; }
  .sticky-buy { flex-direction: column; gap: 14px; border-radius: 20px; padding: 16px; align-items: stretch; }
  .sticky-buy__left, .sticky-buy__right { justify-content: space-between; flex-wrap: wrap; gap: 12px; }
  .sticky-buy__right .btn { flex: 1; }
  .sticky-buy__name { font-size: 15px; }
  .article__body p { font-size: 17px; }
}
@media (max-width: 560px) {
  .grid-4 { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: 1fr 1fr; }
}

/* mobile nav drawer */
.mobile-nav {
  position: fixed; inset: 0;
  background: var(--surface);
  z-index: 300;
  transform: translateY(-100%);
  transition: transform 500ms var(--ease);
  padding: 28px var(--pad);
  display: flex;
  flex-direction: column;
}
.mobile-nav.open { transform: translateY(0); }
.mobile-nav__top { display: flex; justify-content: space-between; align-items: center; height: 48px; }
.mobile-nav__links { margin-top: 48px; display: flex; flex-direction: column; gap: 8px; }
.mobile-nav__links a { font-family: var(--font-display); font-size: 40px; font-weight: 400; }