/* =========================================================================
   ResearchWater.com — adapted from ReadyRx.com design system
   Aqua/teal accent for water/clinical context (vs ReadyRx's orange)
   ========================================================================= */

:root {
  /* — Brand & swatches — */
  --rw-brand-700: #073a52;
  --rw-brand-600: #0a4d68;          /* primary brand */
  --rw-brand-500: #0e6e8f;
  --rw-brand-400: #2da3c4;
  --rw-brand-300: #9ed8e6;          /* tint, used for selection */
  --rw-brand-50:  #e8f6fa;

  --rw-dark-950: #0f1d2c;
  --rw-dark-900: #262626;           /* default heading + body */
  --rw-dark-800: #3a3a3a;
  --rw-dark-700: #5c5c5c;           /* muted/eyebrow */
  --rw-dark-900-o82: rgba(38, 38, 38, 0.82);

  --rw-light-100: #FCFAF9;          /* primary page background — warm off-white */
  --rw-light-200: #F5F3F1;          /* alt section background */
  --rw-light-300: #EDEAE6;          /* divider tint */

  --rw-gray-300: #D6D6D6;
  --rw-gray-200: #E6E6E6;
  --rw-gray-100: #F2F2F2;

  --rw-green-500: #4BA47B;
  --rw-red-500:   #D0444C;

  --rw-card-bg: #ECEDE8;            /* warm sage-clay — for product cards */

  /* — Layout tokens (fluid clamp 320–1440) — */
  --rw-margin: clamp(1.25rem, 5vw, 5rem);
  --rw-nav-height: 5rem;

  --rw-max-main:  90rem;
  --rw-max-med:   66.5rem;
  --rw-max-small: 53rem;

  /* spacing scale */
  --rw-space-1: clamp(0.375rem, 0.5vw, 0.5rem);
  --rw-space-2: clamp(0.625rem, 0.8vw, 0.75rem);
  --rw-space-3: clamp(0.875rem, 1.1vw, 1rem);
  --rw-space-4: clamp(1.25rem, 1.6vw, 1.5rem);
  --rw-space-5: clamp(1.75rem, 2.2vw, 2rem);
  --rw-space-6: clamp(2rem, 2.8vw, 2.5rem);
  --rw-space-7: clamp(2.25rem, 3.4vw, 3rem);
  --rw-space-8: clamp(2.5rem, 4.5vw, 4rem);

  --rw-section-small: clamp(3rem, 6vw, 5rem);
  --rw-section-main:  clamp(4rem, 8vw, 7.5rem);
  --rw-section-large: clamp(7rem, 12vw, 12.875rem);

  /* radii */
  --rw-r-small: 0.5rem;
  --rw-r-main:  1rem;
  --rw-r-round: 100vw;

  /* type scale */
  --rw-fs-display:    clamp(2.25rem, 6.5vw, 6rem);
  --rw-fs-h1:         clamp(2.25rem, 5vw, 4.5rem);
  --rw-fs-h2:         clamp(2rem, 3.6vw, 3rem);
  --rw-fs-h3:         clamp(1.75rem, 2.6vw, 2.25rem);
  --rw-fs-h4:         clamp(1.5rem, 2vw, 1.75rem);
  --rw-fs-h5:         clamp(1.25rem, 1.6vw, 1.375rem);
  --rw-fs-h6:         clamp(1rem, 1.2vw, 1.125rem);
  --rw-fs-large:      clamp(1.125rem, 1.4vw, 1.25rem);
  --rw-fs-main:       clamp(1rem, 1.2vw, 1.125rem);
  --rw-fs-small:      clamp(0.875rem, 1vw, 1rem);
  --rw-fs-xsmall:     clamp(0.75rem, 0.9vw, 0.875rem);

  /* shadows */
  --rw-shadow-sm: 0 4px 12px rgba(38, 38, 38, 0.06);
  --rw-shadow-md: 0 12px 32px rgba(38, 38, 38, 0.08);
  --rw-shadow-lg: 0 18px 48px rgba(38, 38, 38, 0.10);

  /* fonts */
  --rw-font-display: "Instrument Sans", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --rw-font-body:    "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --rw-font-mono:    "Fira Code", ui-monospace, Menlo, Monaco, monospace;
}

/* =========================================================================
   Reset / base
   ========================================================================= */
*,*::before,*::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--rw-font-body);
  font-size: var(--rw-fs-main);
  line-height: 1.5;
  color: var(--rw-dark-900-o82);
  background: var(--rw-light-100);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-wrap: pretty;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--rw-brand-600); text-decoration: none; transition: color .25s; }
a:hover { color: var(--rw-brand-500); }
button { font: inherit; cursor: pointer; border: 0; background: none; }

::selection { background: var(--rw-brand-300); color: var(--rw-dark-900); }
::-moz-selection { background: var(--rw-brand-300); color: var(--rw-dark-900); }

/* =========================================================================
   Typography
   ========================================================================= */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--rw-font-display);
  font-weight: 500;
  color: var(--rw-dark-900);
  margin: 0 0 var(--rw-space-3);
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
h1 { font-size: var(--rw-fs-h1); letter-spacing: -0.04em; }
h2 { font-size: var(--rw-fs-h2); }
h3 { font-size: var(--rw-fs-h3); }
h4 { font-size: var(--rw-fs-h4); }
h5 { font-size: var(--rw-fs-h5); }
h6 { font-size: var(--rw-fs-h6); }

.rw-display {
  font-family: var(--rw-font-display);
  font-size: var(--rw-fs-display);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--rw-dark-900);
  text-wrap: balance;
}

.rw-eyebrow {
  font-family: var(--rw-font-mono);
  font-size: var(--rw-fs-xsmall);
  font-weight: 500;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  color: var(--rw-dark-700);
  margin-bottom: var(--rw-space-3);
  display: inline-block;
}

.rw-lede {
  font-size: var(--rw-fs-large);
  line-height: 1.5;
  color: var(--rw-dark-900-o82);
  max-width: 54ch;
}

.rw-accent { color: var(--rw-brand-600); }

p { margin: 0 0 var(--rw-space-3); }

small, .rw-small { font-size: var(--rw-fs-small); color: var(--rw-dark-700); }

/* =========================================================================
   Layout
   ========================================================================= */
.rw-container {
  width: 100%;
  max-width: var(--rw-max-main);
  margin: 0 auto;
  padding-left: var(--rw-margin);
  padding-right: var(--rw-margin);
}
.rw-container--med { max-width: var(--rw-max-med); }
.rw-container--small { max-width: var(--rw-max-small); }

.rw-section { padding-top: var(--rw-section-main); padding-bottom: var(--rw-section-main); }
.rw-section--small { padding-top: var(--rw-section-small); padding-bottom: var(--rw-section-small); }
.rw-section--alt { background: var(--rw-light-200); }
.rw-section--dark { background: var(--rw-dark-900); color: var(--rw-light-100); }
.rw-section--dark h1, .rw-section--dark h2, .rw-section--dark h3 { color: var(--rw-light-100); }

.rw-grid { display: grid; gap: var(--rw-space-5); }
.rw-grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.rw-grid--3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.rw-grid--4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

@media (min-width: 768px) {
  .rw-grid--2 { grid-template-columns: repeat(2, 1fr); }
  .rw-grid--3 { grid-template-columns: repeat(3, 1fr); }
  .rw-grid--4 { grid-template-columns: repeat(4, 1fr); }
}

/* =========================================================================
   Navigation
   ========================================================================= */
.rw-nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--rw-light-100);
  border-bottom: 1px solid var(--rw-light-300);
  height: var(--rw-nav-height);
  display: flex; align-items: center;
  transition: box-shadow .25s, background-color .25s;
}
.rw-nav--scrolled { box-shadow: var(--rw-shadow-sm); }
.rw-nav__inner {
  width: 100%;
  max-width: var(--rw-max-main);
  margin: 0 auto;
  padding: 0 var(--rw-margin);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--rw-space-6);
}
.rw-nav__brand { display: flex; align-items: center; gap: 0.5rem; }
.rw-nav__brand img { height: 36px; width: auto; display: block; }
.rw-nav__menu {
  display: none;
  list-style: none; margin: 0; padding: 0;
  gap: var(--rw-space-5);
  justify-content: flex-start;
}
@media (min-width: 992px) { .rw-nav__menu { display: flex; } }
.rw-nav__menu a {
  color: var(--rw-dark-900);
  font-weight: 500;
  font-size: 0.9375rem;
  letter-spacing: -0.005em;
  line-height: 1;
  padding: 0.5rem 0;
  position: relative;
}
.rw-nav__menu a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 1px; background: currentColor;
  transform: scaleX(0); transform-origin: left;
  transition: transform .25s cubic-bezier(.625,.05,0,1);
}
.rw-nav__menu a:hover { color: var(--rw-brand-600); }
.rw-nav__menu a:hover::after { transform: scaleX(1); }
.rw-nav__menu a[aria-current="page"] { color: var(--rw-brand-600); }
.rw-nav__menu a[aria-current="page"]::after { transform: scaleX(1); background: var(--rw-brand-600); }
.rw-nav__cta { display: flex; align-items: center; gap: var(--rw-space-3); }

.rw-nav__toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px;
  border-radius: var(--rw-r-small);
  background: transparent;
}
@media (min-width: 992px) { .rw-nav__toggle { display: none; } }
.rw-nav__toggle span {
  display: block; width: 22px; height: 1.5px;
  background: var(--rw-dark-900);
  position: relative;
}
.rw-nav__toggle span::before, .rw-nav__toggle span::after {
  content: ""; position: absolute; left: 0; width: 22px; height: 1.5px; background: var(--rw-dark-900);
  transition: transform .25s;
}
.rw-nav__toggle span::before { top: -7px; }
.rw-nav__toggle span::after  { top: 7px; }
.rw-nav__toggle[aria-expanded="true"] span { background: transparent; }
.rw-nav__toggle[aria-expanded="true"] span::before { transform: translateY(7px) rotate(45deg); }
.rw-nav__toggle[aria-expanded="true"] span::after  { transform: translateY(-7px) rotate(-45deg); }

.rw-nav__mobile {
  position: fixed;
  top: var(--rw-nav-height);
  left: 0; right: 0;
  background: var(--rw-light-100);
  border-bottom: 1px solid var(--rw-light-300);
  padding: var(--rw-space-5) var(--rw-margin) var(--rw-space-6);
  transform: translateY(-105%);
  transition: transform .3s cubic-bezier(.625,.05,0,1);
  box-shadow: var(--rw-shadow-md);
  z-index: 999;
}
.rw-nav__mobile.is-open { transform: translateY(0); }
.rw-nav__mobile ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--rw-space-3); }
.rw-nav__mobile a {
  display: block; padding: var(--rw-space-3) 0;
  color: var(--rw-dark-900);
  font-family: var(--rw-font-display);
  font-size: var(--rw-fs-h5);
  font-weight: 500;
  border-bottom: 1px solid var(--rw-light-300);
}

/* offset content for fixed nav */
main { padding-top: var(--rw-nav-height); }

/* =========================================================================
   Buttons
   ========================================================================= */
.rw-btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 0.5rem;
  padding: var(--rw-space-4) var(--rw-space-5);
  font-family: var(--rw-font-body);
  font-size: var(--rw-fs-small);
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0;
  border-radius: var(--rw-r-round);
  border: 0.0468rem solid var(--rw-dark-950);
  background: var(--rw-dark-950);
  color: #ffffff;
  transition: border-color .2s, color .25s, background-color .25s, transform .2s;
  text-align: center;
  white-space: nowrap;
  min-height: 44px;
}
.rw-btn:hover { background: rgba(0,0,0,0.7); color: #ffffff; }
.rw-btn:active { transform: scale(0.98); }

.rw-btn--secondary {
  background: var(--rw-light-100);
  color: var(--rw-dark-900);
  border-color: var(--rw-gray-300);
}
.rw-btn--secondary:hover { background: var(--rw-light-200); color: var(--rw-dark-900); border-color: var(--rw-dark-900); }

.rw-btn--brand {
  background: var(--rw-brand-600);
  border-color: var(--rw-brand-600);
}
.rw-btn--brand:hover { background: var(--rw-brand-700); border-color: var(--rw-brand-700); color: #ffffff; }

.rw-btn--small { padding: 0.75rem 1.25rem; font-size: var(--rw-fs-small); min-height: 44px; }
.rw-btn--block { width: 100%; }

/* =========================================================================
   Forms / inputs
   ========================================================================= */
.rw-input, .rw-textarea, .rw-select {
  width: 100%;
  font-family: var(--rw-font-body);
  font-size: var(--rw-fs-main);  /* 16px+ to prevent iOS zoom */
  line-height: 1.4;
  color: var(--rw-dark-900);
  background: var(--rw-light-100);
  border: 1px solid var(--rw-gray-300);
  border-radius: var(--rw-r-small);
  padding: var(--rw-space-3) var(--rw-space-4);
  transition: border-color .2s, box-shadow .2s;
}
.rw-input:focus, .rw-textarea:focus, .rw-select:focus {
  outline: none;
  border-color: var(--rw-brand-600);
  box-shadow: 0 0 0 3px rgba(10,77,104,0.12);
}
.rw-textarea { min-height: 140px; resize: vertical; }
.rw-label { display: block; font-size: var(--rw-fs-small); font-weight: 500; color: var(--rw-dark-900); margin-bottom: 0.5rem; }
.rw-field { margin-bottom: var(--rw-space-4); }

/* =========================================================================
   Hero
   ========================================================================= */
.rw-hero {
  padding: clamp(3rem, 6vw, 6rem) 0 var(--rw-section-main);
  position: relative;
}
.rw-hero__inner {
  display: grid;
  gap: var(--rw-space-7);
  grid-template-columns: 1fr;
  align-items: center;
}
@media (min-width: 992px) {
  .rw-hero__inner { grid-template-columns: 1.1fr 0.9fr; gap: var(--rw-space-8); }
}
.rw-hero__title { margin-bottom: var(--rw-space-4); }
.rw-hero__lede { font-size: var(--rw-fs-large); color: var(--rw-dark-900-o82); margin-bottom: var(--rw-space-5); max-width: 44ch; }
.rw-hero__actions { display: flex; gap: var(--rw-space-3); flex-wrap: wrap; margin-bottom: var(--rw-space-6); }
.rw-hero__media {
  background: var(--rw-card-bg);
  border-radius: var(--rw-r-main);
  aspect-ratio: 5/4;
  display: flex; align-items: center; justify-content: center;
  padding: var(--rw-space-6);
  position: relative;
  overflow: hidden;
  box-shadow: var(--rw-shadow-md);
}
.rw-hero__media::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 20%, rgba(255,255,255,0.55), transparent 60%);
  pointer-events: none;
}
.rw-hero__media img, .rw-hero__media svg { max-height: 90%; max-width: 80%; position: relative; z-index: 1; filter: drop-shadow(0 30px 40px rgba(7,46,63,0.18)); }

.rw-hero__bullets {
  list-style: none; padding: 0; margin: var(--rw-space-5) 0 0;
  display: grid; gap: var(--rw-space-3) var(--rw-space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 568px) { .rw-hero__bullets { grid-template-columns: 1fr 1fr; } }
.rw-hero__bullets li {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: var(--rw-fs-small);
  color: var(--rw-dark-700);
}
.rw-hero__bullets svg { width: 18px; height: 18px; flex-shrink: 0; color: var(--rw-brand-600); }

/* =========================================================================
   Trust bar
   ========================================================================= */
.rw-trust {
  background: var(--rw-light-200);
  padding: var(--rw-space-5) 0;
  border-top: 1px solid var(--rw-light-300);
  border-bottom: 1px solid var(--rw-light-300);
}
.rw-trust__grid {
  display: grid;
  gap: var(--rw-space-4);
  grid-template-columns: repeat(2, 1fr);
  align-items: center;
}
@media (min-width: 768px) { .rw-trust__grid { grid-template-columns: repeat(4, 1fr); } }
.rw-trust__item {
  display: flex; align-items: center; gap: var(--rw-space-3);
  font-size: var(--rw-fs-small);
  color: var(--rw-dark-700);
}
.rw-trust__icon {
  display: flex; align-items: center; justify-content: center;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--rw-brand-50);
  color: var(--rw-brand-600);
  flex-shrink: 0;
}
.rw-trust__icon svg { width: 22px; height: 22px; }
.rw-trust__title { font-weight: 600; color: var(--rw-dark-900); display: block; line-height: 1.2; }

/* =========================================================================
   Product card
   ========================================================================= */
.rw-product-card {
  background: var(--rw-light-100);
  border-radius: var(--rw-r-main);
  border: 1px solid var(--rw-light-300);
  overflow: hidden;
  transition: transform .25s cubic-bezier(.625,.05,0,1), box-shadow .3s;
  display: flex; flex-direction: column;
  height: 100%;
}
.rw-product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--rw-shadow-lg);
  border-color: transparent;
}
.rw-product-card__media {
  background: var(--rw-card-bg);
  aspect-ratio: 4/5;
  display: flex; align-items: center; justify-content: center;
  padding: var(--rw-space-5);
  position: relative;
  overflow: hidden;
}
.rw-product-card__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(255,255,255,0.4), transparent 50%);
  pointer-events: none;
}
.rw-product-card__media img, .rw-product-card__media svg {
  max-height: 88%; max-width: 70%;
  filter: drop-shadow(0 18px 24px rgba(7,46,63,0.15));
  transition: transform .35s cubic-bezier(.625,.05,0,1);
  position: relative; z-index: 1;
}
/* card transform handles the lift; SVG inside stays static for cleaner motion */

.rw-product-card__badge {
  position: absolute; top: var(--rw-space-3); left: var(--rw-space-3);
  background: var(--rw-light-100);
  border: 1px solid var(--rw-gray-300);
  color: var(--rw-dark-900);
  font-family: var(--rw-font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 6px 10px;
  border-radius: 100vw;
  z-index: 2;
}

.rw-product-card__body { padding: var(--rw-space-5); display: flex; flex-direction: column; flex-grow: 1; }
.rw-product-card__eyebrow {
  font-family: var(--rw-font-mono);
  font-size: 11px;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  color: var(--rw-dark-700);
  margin-bottom: 0.5rem;
}
.rw-product-card__title {
  font-family: var(--rw-font-display);
  font-size: var(--rw-fs-h5);
  font-weight: 500;
  color: var(--rw-dark-900);
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}
.rw-product-card__desc { font-size: var(--rw-fs-small); color: var(--rw-dark-900-o82); margin-bottom: var(--rw-space-3); flex-grow: 1; }
.rw-product-card__footer {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--rw-space-3);
  padding-top: var(--rw-space-3);
  border-top: 1px solid var(--rw-light-300);
}
.rw-product-card__price { font-family: var(--rw-font-display); font-size: var(--rw-fs-h5); color: var(--rw-dark-900); font-weight: 500; }
.rw-product-card__price-from { font-size: var(--rw-fs-xsmall); color: var(--rw-dark-700); display: block; line-height: 1; margin-bottom: 2px; font-family: var(--rw-font-body); letter-spacing: 0.05em; }

/* =========================================================================
   Single product
   ========================================================================= */
.rw-pdp { padding: clamp(2.5rem, 5vw, 4rem) 0 var(--rw-section-main); }
.rw-pdp__inner { display: grid; gap: var(--rw-space-7); grid-template-columns: 1fr; }
@media (min-width: 992px) { .rw-pdp__inner { grid-template-columns: 1fr 1fr; gap: var(--rw-space-8); } }
.rw-pdp__media {
  background: var(--rw-card-bg);
  border-radius: var(--rw-r-main);
  aspect-ratio: 1/1;
  display: flex; align-items: center; justify-content: center;
  padding: var(--rw-space-7);
  position: relative;
  overflow: hidden;
}
.rw-pdp__media::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 10%, rgba(255,255,255,0.5), transparent 55%);
  pointer-events: none;
}
.rw-pdp__media img, .rw-pdp__media svg { max-height: 88%; max-width: 70%; filter: drop-shadow(0 30px 40px rgba(7,46,63,0.18)); position: relative; z-index: 1; }

.rw-pdp__title { font-size: var(--rw-fs-h2); margin-bottom: var(--rw-space-3); }
.rw-pdp__price { display: flex; align-items: baseline; gap: var(--rw-space-3); margin-bottom: var(--rw-space-4); }
.rw-pdp__price-amount { font-family: var(--rw-font-display); font-size: var(--rw-fs-h3); color: var(--rw-dark-900); font-weight: 500; }
.rw-pdp__price-each { font-size: var(--rw-fs-small); color: var(--rw-dark-700); }

.rw-variants { display: grid; gap: 0.5rem; grid-template-columns: repeat(2, 1fr); margin-bottom: var(--rw-space-5); }
.rw-variant {
  border: 1px solid var(--rw-gray-300);
  background: var(--rw-light-100);
  padding: var(--rw-space-3);
  border-radius: var(--rw-r-small);
  cursor: pointer;
  transition: border-color .2s, background-color .25s, color .25s;
  text-align: left;
  display: flex; flex-direction: column; gap: 2px;
}
.rw-variant:hover { border-color: var(--rw-dark-900); }
.rw-variant.is-active { border-color: var(--rw-dark-900); background: var(--rw-dark-900); color: #fff; }
.rw-variant__size { font-family: var(--rw-font-display); font-size: var(--rw-fs-h6); font-weight: 500; }
.rw-variant__price { font-size: var(--rw-fs-xsmall); opacity: 0.75; }

.rw-pdp__specs {
  margin-top: var(--rw-space-5);
  border-top: 1px solid var(--rw-light-300);
  padding-top: var(--rw-space-5);
}
.rw-spec-row {
  display: grid; grid-template-columns: minmax(140px, 1fr) 2.5fr; gap: var(--rw-space-3);
  padding: var(--rw-space-3) 0;
  border-bottom: 1px solid var(--rw-light-300);
  font-size: var(--rw-fs-small);
}
.rw-spec-row__key { color: var(--rw-dark-700); font-family: var(--rw-font-mono); font-size: var(--rw-fs-xsmall); letter-spacing: 0.1em; text-transform: uppercase; }
.rw-spec-row__val { color: var(--rw-dark-900); }

/* =========================================================================
   FAQ accordion
   ========================================================================= */
.rw-faq { display: flex; flex-direction: column; gap: var(--rw-space-2); }
.rw-faq__item {
  background: var(--rw-light-100);
  border: 1px solid var(--rw-light-300);
  border-radius: var(--rw-r-main);
  overflow: hidden;
  transition: border-color .2s;
}
.rw-faq__item[open] { border-color: var(--rw-dark-900); }
.rw-faq__item summary {
  list-style: none;
  cursor: pointer;
  padding: var(--rw-space-4) var(--rw-space-5);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--rw-space-3);
  font-family: var(--rw-font-display);
  font-size: var(--rw-fs-h6);
  font-weight: 500;
  color: var(--rw-dark-900);
}
.rw-faq__item summary::-webkit-details-marker { display: none; }
.rw-faq__item summary::after {
  content: "";
  width: 16px; height: 16px;
  flex-shrink: 0;
  background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M3 5l5 5 5-5' stroke='%23262626' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/></svg>") no-repeat center / contain;
  transition: transform .25s;
}
.rw-faq__item[open] summary::after { transform: rotate(180deg); }
.rw-faq__item p {
  padding: 0 var(--rw-space-5) var(--rw-space-5);
  margin: 0;
  font-size: var(--rw-fs-small);
  color: var(--rw-dark-900-o82);
  line-height: 1.6;
}

/* =========================================================================
   Footer
   ========================================================================= */
.rw-footer {
  background: var(--rw-dark-900);
  color: var(--rw-gray-300);
  padding: var(--rw-section-small) 0 var(--rw-space-5);
  margin-top: var(--rw-section-main);
}
.rw-footer h2, .rw-footer h3, .rw-footer h4 { color: var(--rw-light-100); }
.rw-footer__top {
  display: grid;
  gap: var(--rw-space-7);
  grid-template-columns: 1fr;
}
@media (min-width: 768px) { .rw-footer__top { grid-template-columns: 2fr 1fr 1fr 1fr; } }
.rw-footer__brand { max-width: 32ch; }
.rw-footer__brand img { height: 44px; width: auto; margin-bottom: var(--rw-space-3); display: block; }
.rw-footer__brand p { color: var(--rw-gray-300); font-size: var(--rw-fs-small); }
.rw-footer__col h4 {
  font-family: var(--rw-font-mono);
  font-size: 12px;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  font-weight: 500;
  margin-bottom: var(--rw-space-4);
  color: var(--rw-gray-300);
}
.rw-footer__col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--rw-space-2); }
.rw-footer__col a { color: var(--rw-light-100); font-size: var(--rw-fs-small); }
.rw-footer__col a:hover { color: var(--rw-brand-300); }
.rw-footer__bottom {
  margin-top: var(--rw-section-small);
  padding-top: var(--rw-space-5);
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  flex-wrap: wrap;
  gap: var(--rw-space-3);
  justify-content: space-between;
  align-items: center;
  font-size: var(--rw-fs-xsmall);
  color: var(--rw-gray-300);
}
.rw-footer__legal { display: flex; gap: var(--rw-space-4); flex-wrap: wrap; }
.rw-footer__legal a { color: var(--rw-gray-300); }
.rw-footer__disclaimer {
  background: rgba(255,255,255,0.04);
  border-radius: var(--rw-r-small);
  padding: var(--rw-space-3) var(--rw-space-4);
  font-size: var(--rw-fs-xsmall);
  color: var(--rw-gray-300);
  margin-top: var(--rw-space-5);
  border-left: 2px solid rgba(255,255,255,0.2);
}
.rw-footer__col a { padding: 0.25rem 0; display: inline-block; min-height: 28px; }

/* =========================================================================
   CTA banner / disclaimer banner
   ========================================================================= */
.rw-banner {
  background: var(--rw-dark-950);
  color: var(--rw-light-100);
  padding: 0.5rem var(--rw-margin);
  text-align: center;
  font-family: var(--rw-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  line-height: 1.4;
}

/* =========================================================================
   Utility
   ========================================================================= */
.rw-text-center { text-align: center; }
.rw-mt-0 { margin-top: 0; }
.rw-mb-0 { margin-bottom: 0; }
.rw-mt-3 { margin-top: var(--rw-space-3); }
.rw-mt-5 { margin-top: var(--rw-space-5); }
.rw-mt-7 { margin-top: var(--rw-space-7); }
.rw-mb-3 { margin-bottom: var(--rw-space-3); }
.rw-mb-5 { margin-bottom: var(--rw-space-5); }
.rw-mb-7 { margin-bottom: var(--rw-space-7); }

.rw-section-head { display: flex; flex-direction: column; align-items: flex-start; margin-bottom: var(--rw-space-7); max-width: var(--rw-max-small); }
.rw-section-head--center { align-items: center; text-align: center; margin-left: auto; margin-right: auto; }

.rw-divider { height: 1px; background: var(--rw-light-300); border: 0; margin: var(--rw-section-small) 0; }

.rw-link-arrow {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--rw-font-mono);
  font-size: var(--rw-fs-small);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--rw-dark-900);
}
.rw-link-arrow:hover { color: var(--rw-brand-600); }
.rw-link-arrow svg { width: 14px; height: 14px; transition: transform .25s; }
.rw-link-arrow:hover svg { transform: translateX(3px); }

/* compliance pill */
.rw-pill {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--rw-light-200);
  border: 1px solid var(--rw-light-300);
  padding: 6px 14px;
  border-radius: 100vw;
  font-family: var(--rw-font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--rw-dark-700);
}
.rw-pill svg { width: 12px; height: 12px; }

/* skip link */
.rw-skip { position: absolute; left: -9999px; top: auto; }
.rw-skip:focus { left: var(--rw-margin); top: var(--rw-space-3); padding: var(--rw-space-3) var(--rw-space-4); background: var(--rw-dark-900); color: #fff; border-radius: var(--rw-r-small); z-index: 9999; }

/* loader animation for hero water */
@keyframes rw-bob { 0%,100% { transform: translateY(0);} 50% { transform: translateY(-8px);} }
.rw-bob { animation: rw-bob 4s ease-in-out infinite; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0s !important; transition-duration: 0s !important; }
}

/* =========================================================================
   Utility classes (consolidate common inline-style patterns)
   ========================================================================= */
.rw-feature-card {
  border: 1px solid var(--rw-light-300);
  border-radius: var(--rw-r-main);
  padding: var(--rw-space-5);
  background: var(--rw-light-100);
}
.rw-feature-card--center { padding: var(--rw-space-7); text-align: center; }
.rw-feature-card p:last-child { margin-bottom: 0; }
.rw-feature-card h3 { font-size: var(--rw-fs-h6); margin-bottom: var(--rw-space-3); }
.rw-feature-card p { font-size: var(--rw-fs-small); color: var(--rw-dark-900-o82); }

.rw-pill-row {
  display: flex; gap: 0.5rem; flex-wrap: wrap;
  margin-bottom: var(--rw-space-5);
}
.rw-pill--on-dark {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.12);
  color: var(--rw-gray-300);
}

.rw-form-card {
  background: var(--rw-light-100);
  border: 1px solid var(--rw-light-300);
  border-radius: var(--rw-r-main);
  padding: var(--rw-space-6);
}

.rw-notice {
  margin-top: var(--rw-space-5);
  padding: var(--rw-space-4);
  border-radius: var(--rw-r-small);
}
.rw-notice--success {
  background: var(--rw-brand-50);
  border-left: 3px solid var(--rw-brand-400);
  color: var(--rw-dark-900);
}

.rw-prose { max-width: 70ch; }

.rw-label__optional { color: var(--rw-dark-700); font-weight: 400; }

.rw-section--top { padding-top: clamp(5rem, 8vw, 7rem); }

.rw-section-h-compact h2 { font-size: var(--rw-fs-h3); margin: 0; }

.rw-actions-row {
  display: flex; gap: var(--rw-space-3);
  margin-bottom: var(--rw-space-5);
  flex-wrap: wrap;
}

/* =========================================================================
   Tablet & mobile breakpoints
   ========================================================================= */
@media (min-width: 568px) and (max-width: 991px) {
  .rw-grid--3 { grid-template-columns: repeat(2, 1fr); }
  .rw-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .rw-trust__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 991px) {
  :root { --rw-nav-height: 4.25rem; }
  .rw-nav__cta .rw-btn--small { display: none; }
  .rw-pdp__media { aspect-ratio: 4/3; max-height: 480px; }
}

@media (min-width: 992px) {
  .rw-nav__mobile { display: none; }
}

@media (max-width: 767px) {
  .rw-link-arrow { padding: 0.625rem 0; min-height: 44px; }
}

@media (max-width: 567px) {
  .rw-product-card__media { aspect-ratio: 1/1; }
  .rw-pdp__media { aspect-ratio: 1/1; }
  .rw-hero__media { aspect-ratio: 1/1; }
  .rw-variants { grid-template-columns: 1fr; }
}

@media (max-width: 479px) {
  .rw-hero { padding: 3.5rem 0 var(--rw-section-small); }
  .rw-hero__lede { font-size: var(--rw-fs-main); }
  .rw-hero__bullets { grid-template-columns: 1fr; }
  .rw-hero__actions { flex-direction: column; align-items: stretch; }
  .rw-hero__actions .rw-btn { width: 100%; }
  .rw-spec-row { grid-template-columns: 1fr; gap: 4px; }
  .rw-spec-row__key { font-size: 11px; }
  .rw-faq__item summary { padding: var(--rw-space-3) var(--rw-space-4); font-size: var(--rw-fs-main); }
  .rw-banner { font-size: 10px; letter-spacing: 0.08em; }
}

/* =========================================================================
   404 page (extracted from inline <style>)
   ========================================================================= */
.rw-404 {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: var(--rw-margin);
  position: relative; overflow: hidden;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(159,216,230,0.35), transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(10,77,104,0.18), transparent 60%),
    var(--rw-light-100);
}
.rw-404__bubble {
  position: absolute; border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.9), rgba(159,216,230,0.4) 60%, rgba(10,77,104,0.15));
  box-shadow: inset 0 0 30px rgba(255,255,255,0.5), 0 8px 24px rgba(7,46,63,0.1);
  animation: rw-float 12s ease-in-out infinite;
}
.rw-404__bubble--1 { top: 8%; left: 8%; width: 120px; height: 120px; animation-delay: -2s; }
.rw-404__bubble--2 { top: 18%; right: 10%; width: 80px; height: 80px; animation-delay: -5s; }
.rw-404__bubble--3 { bottom: 18%; right: 18%; width: 100px; height: 100px; animation-delay: -3s; }
.rw-404__bubble--4 { top: 60%; right: 6%; width: 50px; height: 50px; animation-delay: -10s; }
@keyframes rw-float {
  0%, 100% { transform: translateY(0) translateX(0); }
  25% { transform: translateY(-18px) translateX(8px); }
  50% { transform: translateY(8px) translateX(-12px); }
  75% { transform: translateY(-10px) translateX(14px); }
}
.rw-404__inner { max-width: 540px; text-align: center; position: relative; z-index: 1; }
.rw-404__num {
  font-family: var(--rw-font-display);
  font-size: clamp(7rem, 18vw, 14rem);
  font-weight: 500; line-height: 0.9; letter-spacing: -0.06em;
  background: linear-gradient(180deg, #5fb8d6 0%, #0a4d68 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--rw-space-3);
  filter: drop-shadow(0 12px 24px rgba(7,46,63,0.18));
}
.rw-404__title { font-size: var(--rw-fs-h3); margin-bottom: var(--rw-space-3); }
.rw-404__lede { font-size: var(--rw-fs-large); color: var(--rw-dark-900-o82); margin-bottom: var(--rw-space-6); }
.rw-404__actions { display: flex; gap: var(--rw-space-3); justify-content: center; flex-wrap: wrap; }
.rw-404__lab {
  margin-top: var(--rw-space-7);
  font-family: var(--rw-font-mono); font-size: 11px;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--rw-dark-700);
}