/* No Brainer Water Co. - shell + rhythm + shared components.
   Fable-owned. Page-specific styles live in page-*.css, never here. */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-weight: var(--w-regular);
  font-size: var(--text-base);
  line-height: 1.55;
  color: rgb(var(--ink));
  background: rgb(var(--paper));
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }

/* announcement bar */
.announce {
  background: rgb(var(--announce));
  color: #fff;
  text-align: center;
  font-size: var(--text-sm);
  padding: 0.55rem 1rem;
}

/* nav - dark, 3-zone; centre logo */
.nav {
  background: var(--header-bg);
  color: #fff;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0.9rem var(--gutter);
  position: relative;
  z-index: 40;
}
.nav a { text-decoration: none; }
.nav-links { display: flex; gap: 1.6rem; font-size: var(--text-sm); }
.nav-links a:hover { opacity: 0.75; }
.nav-logo {
  justify-self: center;
  font-weight: var(--w-medium);
  letter-spacing: 0.02em;
  font-size: 1.15rem;
  white-space: nowrap;
}
.nav-logo span { opacity: 0.65; margin-left: 0.4em; font-weight: var(--w-regular); }
.nav-right { justify-self: end; display: flex; gap: 1.4rem; font-size: var(--text-sm); }
.nav-burger { display: none; }

@media (max-width: 999px) {
  .nav { grid-template-columns: auto 1fr auto; }
  .nav-links {
    display: none;
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--header-bg);
    flex-direction: column; gap: 0;
    padding: 0.5rem 0 1rem;
  }
  .nav-links a { padding: 0.8rem var(--gutter); }
  .nav.is-open .nav-links { display: flex; }
  .nav-burger {
    display: block; background: none; border: 0; cursor: pointer;
    width: 40px; height: 40px; position: relative;
  }
  .nav-burger span, .nav-burger span::before, .nav-burger span::after {
    content: ""; position: absolute; left: 8px; right: 8px; height: 2px;
    background: #fff; transition: transform 0.2s;
  }
  .nav-burger span { top: 19px; }
  .nav-burger span::before { top: -7px; }
  .nav-burger span::after { top: 7px; }
  .nav-help { display: none; }
}

/* sections */
.sec { padding-block: var(--section-pad-block); }
.sec--dark  { background: rgb(var(--ink)); color: #fff; }
.sec--dark2 { background: linear-gradient(180deg, rgb(var(--ink)), rgb(var(--ink-2))); color: #fff; }
.sec--light { background: rgb(var(--paper)); }
.sec--dim   { background: rgb(var(--paper-dim)); }
.container { max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.container--narrow { max-width: 760px; }

/* type */
.kicker {
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.6;
  margin: 0 0 1rem;
  font-weight: var(--w-medium);
}
.display {
  font-weight: var(--w-medium);
  font-size: clamp(2.1rem, 5.4vw, 3.9rem);
  line-height: 1.07;
  letter-spacing: -0.01em;
  margin: 0 0 1.2rem;
}
.display--hero { font-size: clamp(2.6rem, 6.4vw, 4.6rem); }
.display .hl { color: rgb(var(--accent)); }
.sub { font-size: var(--text-lg); opacity: 0.82; max-width: 34em; margin: 0 0 1.6rem; }
h3 { font-weight: var(--w-medium); font-size: 1.35rem; margin: 0 0 0.5rem; }

/* buttons - pills, inverted per surface */
.btn {
  /* RULE (Mason, 9 Aug): every pill button is EXACTLY the same height.
     min-height + flex centering, no exceptions, no per-page padding. */
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 3.25rem;
  border: 0; cursor: pointer;
  border-radius: var(--btn-radius);
  padding: 0 1.6rem;
  font: inherit; font-weight: var(--w-medium); font-size: var(--text-base);
  text-decoration: none;
  transition: transform 0.15s ease, opacity 0.15s ease;
}
.btn:hover { transform: translateY(-1px); opacity: 0.92; }
.btn--light { background: #fff; color: rgb(var(--ink)); }
.btn--dark  { background: rgb(var(--ink)); color: #fff; }
.btn--accent { background: rgb(var(--accent)); color: rgb(var(--accent-ink)); }
.btn--ghost { background: transparent; box-shadow: inset 0 0 0 1.5px currentColor; color: inherit; }

/* rating / proof line */
.proof-line { display: flex; align-items: center; gap: 0.7rem; font-size: var(--text-sm); opacity: 0.85; }

/* cards */
.card {
  background: rgb(var(--paper));
  border-radius: var(--radius-card);
  padding: 1.6rem;
  border: 1px solid rgb(var(--ink) / 0.08);
}
.sec--dark .card, .sec--dark2 .card {
  background: rgb(255 255 255 / 0.05);
  border-color: rgb(255 255 255 / 0.1);
}
.media-rounded { border-radius: var(--radius-media); overflow: hidden; }

/* grid helpers */
.grid-2 { display: grid; gap: 1.6rem; grid-template-columns: 1fr; }
.grid-3 { display: grid; gap: 1.6rem; grid-template-columns: 1fr; }
.grid-4 { display: grid; gap: 1.6rem; grid-template-columns: 1fr; }
@media (min-width: 560px) { .grid-4 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1000px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* comparison ladder (gadget ladder) */
.ladder { width: 100%; border-collapse: collapse; font-size: var(--text-sm); }
.ladder th, .ladder td { padding: 0.85rem 1rem; text-align: left; border-top: 1px solid rgb(var(--ink) / 0.1); }
.ladder th { font-weight: var(--w-medium); }
.ladder .tick { color: rgb(35 160 90); font-weight: var(--w-medium); }
.ladder .cross { opacity: 0.4; }
.ladder .col-us { background: rgb(var(--accent) / 0.09); }
.ladder-wrap { overflow-x: auto; }

/* accordion (FAQ) */
.acc { border-top: 1px solid rgb(var(--ink) / 0.12); }
.acc__item { border-bottom: 1px solid rgb(var(--ink) / 0.12); }
.acc__q {
  width: 100%; background: none; border: 0; cursor: pointer;
  font: inherit; font-weight: var(--w-medium); font-size: 1.05rem;
  text-align: left; padding: 1.3rem 2.5rem 1.3rem 0;
  position: relative; color: inherit;
}
.acc__q::after {
  content: ""; position: absolute; right: 6px; top: 50%;
  width: 9px; height: 9px;
  border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
  transform: translateY(-70%) rotate(45deg); transition: transform 0.2s;
}
.acc__item.is-open .acc__q::after { transform: translateY(-30%) rotate(225deg); }
.acc__a { display: none; padding: 0 0 1.4rem; max-width: 60ch; opacity: 0.85; }
.acc__item.is-open .acc__a { display: block; }

/* sticky product bar - the signature element */
.sticky-bar {
  position: fixed; left: 50%; bottom: 18px; transform: translateX(-50%);
  z-index: 60;
  display: flex; align-items: center; gap: 2.2rem;
  background: var(--bar-bg);
  -webkit-backdrop-filter: blur(var(--bar-blur));
  backdrop-filter: blur(var(--bar-blur));
  border-radius: var(--bar-radius);
  padding: 0.7rem 0.8rem 0.7rem 1.6rem;
  color: #fff;
  width: min(560px, calc(100vw - 28px));
  justify-content: space-between;
  box-shadow: 0 8px 30px rgb(0 0 0 / 0.25);
}
.sticky-bar[hidden] { display: none; }
.sticky-bar__info { display: flex; flex-direction: column; line-height: 1.3; }
.sticky-bar__info strong { font-weight: var(--w-medium); font-size: var(--text-base); }
.sticky-bar__info span { font-size: var(--text-xs); opacity: 0.75; }
.sticky-bar .btn { padding: 0.7rem 1.5rem; }

/* footer */
.footer { background: rgb(var(--ink)); color: #fff; padding: 4.5rem 0 6.5rem; }
.footer a { text-decoration: none; opacity: 0.8; }
.footer a:hover { opacity: 1; }
.footer__grid { display: grid; gap: 3rem; grid-template-columns: 1fr; }
@media (min-width: 1000px) { .footer__grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; } }
.footer h4 { font-weight: var(--w-medium); font-size: var(--text-sm); margin: 0 0 1rem; }
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.7rem; font-size: var(--text-sm); }
.footer__signup input {
  width: 100%; max-width: 320px;
  border-radius: 999px; border: 1px solid rgb(255 255 255 / 0.25);
  background: transparent; color: #fff;
  padding: 0.85rem 1.2rem; font: inherit;
}
.footer__legal { margin-top: 3rem; font-size: var(--text-xs); opacity: 0.55; }

/* price pending (RO until remineraliser cost pinned) */
.price--pending { opacity: 0.55; }
.price--pending::after { content: " (final price at launch)"; font-size: var(--text-xs); }

/* scroll reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.5s ease-out, transform 0.5s ease-out; }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* borrowed-trust strip - shared across shop + PDPs (see page-product.css origin) */
.cert-strip { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1.4rem; }
.cert { display: flex; align-items: center; gap: 0.7rem; background: #fff; border: 1px solid rgb(var(--ink) / 0.12); border-radius: 12px; padding: 0.65rem 1rem; }
.sec--dark .cert, .sec--dark2 .cert { background: rgb(255 255 255 / 0.06); border-color: rgb(255 255 255 / 0.15); }
.cert img { height: 44px; width: auto; border-radius: 6px; }
.cert span { font-size: 0.78rem; line-height: 1.3; opacity: 0.85; }
.cert b { display: block; font-size: 0.9rem; }

/* counter-position table - "Genuine Pentair vs the typical import".
   Shared: homepage + ES60 PDP. Honest generic rival column, never a named brand. */
.cp-wrap { overflow-x: auto; margin-top: 2rem; }
.cp-table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); min-width: 560px; }
.cp-table th, .cp-table td { padding: 0.85rem 1rem; text-align: left; border-bottom: 1px solid rgb(var(--ink) / 0.1); vertical-align: top; }
.cp-table thead th { font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.06em; opacity: 0.7; }
.cp-table tbody th { font-weight: var(--w-medium); width: 22%; opacity: 0.75; }
.cp-table .cp-us { background: rgb(var(--accent) / 0.09); font-weight: var(--w-medium); }
.cp-table thead .cp-us { opacity: 1; }
.cp-table .cp-them { opacity: 0.6; }
.cp-note { font-size: var(--text-xs); opacity: 0.55; margin-top: 0.8rem; }

/* hero proof chips - the AquaTru three-icon row, our true claims */
.hero-chips { display: flex; flex-wrap: wrap; gap: 1rem 2.2rem; margin-top: 2rem; padding: 0; list-style: none; }
.hero-chips li { display: flex; align-items: center; gap: 0.65rem; font-size: var(--text-sm); max-width: 200px; line-height: 1.35; }
.hero-chips svg { flex: none; width: 34px; height: 34px; opacity: 0.9; }
.hero-chips b { font-weight: var(--w-regular); opacity: 0.85; }

/* trust triple - guarantee / provenance / warranty badges touching the buy box */
.trust-triple { display: flex; flex-wrap: wrap; gap: 0.6rem 1.6rem; margin: 1rem 0 1.4rem; padding: 0; list-style: none; }
.trust-triple li { display: flex; align-items: center; gap: 0.5rem; font-size: var(--text-xs); opacity: 0.8; }
.trust-triple svg { flex: none; width: 22px; height: 22px; }

/* health-goal duality strip - legal limit vs health-based goal.
   The goal column is deliberately attention-strong; the concession line stays. */
.goal-strip { border-radius: var(--radius-card); border: 1px solid rgb(var(--ink) / 0.1); background: rgb(var(--paper)); padding: 1.4rem 1.6rem; margin-top: 2.2rem; }
.sec--dark .goal-strip, .sec--dark2 .goal-strip { background: rgb(255 255 255 / 0.05); border-color: rgb(255 255 255 / 0.12); }
.goal-strip h3 { font-size: 1.15rem; margin: 0 0 0.9rem; }
.goal-wrap { overflow-x: auto; }
.goal-table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); min-width: 520px; }
.goal-table th, .goal-table td { padding: 0.6rem 0.9rem; text-align: left; border-bottom: 1px solid rgb(var(--ink) / 0.08); }
.sec--dark .goal-table th, .sec--dark .goal-table td, .sec--dark2 .goal-table th, .sec--dark2 .goal-table td { border-color: rgb(255 255 255 / 0.12); }
.goal-table thead th { font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.05em; opacity: 0.65; font-weight: var(--w-medium); }
.goal-table tbody th { font-weight: var(--w-medium); }
.goal-table .goal-num { font-weight: var(--w-medium); color: #e05252; white-space: nowrap; }
.sec--dark .goal-table .goal-num, .sec--dark2 .goal-table .goal-num { color: #ff8a80; }
.goal-table .limit-num { white-space: nowrap; opacity: 0.85; }
.goal-strip__line { font-size: var(--text-sm); opacity: 0.8; margin: 1rem 0 0; max-width: 60ch; }

/* removal checklist - named contaminants as a countable artefact */
.removes-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 0.5rem 1.6rem; margin: 1.6rem 0 0; padding: 0; list-style: none; font-size: var(--text-sm); }
.removes-list li { display: flex; align-items: baseline; gap: 0.5rem; }
.removes-list li::before { content: "\2713"; color: rgb(var(--accent)); font-weight: 800; }
.removes-list span { opacity: 0.55; }
.cert-sentence { font-size: var(--text-sm); opacity: 0.75; margin-top: 1.4rem; max-width: 62ch; }

/* RRP strikes (genuine supplier RRP only - never invented "was" prices) */
.rrp { text-decoration: line-through; opacity: 0.5; font-weight: var(--w-regular); font-size: 0.72em; margin-right: 0.35rem; }
.rrp-note { font-size: var(--text-xs); opacity: 0.55; margin: -0.4rem 0 0.8rem; }

/* Gallery lightbox */
.pdp-gallery img { cursor: zoom-in; }
.lightbox { position: fixed; inset: 0; z-index: 999; background: rgba(2, 28, 70, 0.92); display: flex; align-items: center; justify-content: center; padding: 4vmin; cursor: zoom-out; }
.lightbox img { max-width: 100%; max-height: 100%; border-radius: 12px; box-shadow: 0 24px 80px rgba(0,0,0,0.5); }

/* Price pop: bigger price, cyan save pill (genuine RRP delta only) */
.pdp-price { font-size: 2.1rem; font-weight: var(--w-bold); }
.save-pill { display: inline-block; vertical-align: middle; background: #37d6e5; color: #021c46; font-size: 0.82rem; font-weight: var(--w-bold); border-radius: 999px; padding: 0.18rem 0.7rem; margin-left: 0.45rem; text-decoration: none; }
.product-card__price .save-pill { font-size: 0.72rem; padding: 0.12rem 0.55rem; }

/* Cyan tick trust signals */
.cert span b::before { content: '\2713  '; color: #37d6e5; font-weight: 800; }
.card-certs span::before { content: '\2713'; color: #37d6e5; font-weight: 800; margin-right: 0.15rem; }
.trust-row span::before { content: '\2713  '; color: #37d6e5; font-weight: 800; }
.cert { border-left: 3px solid #37d6e5; }

/* Related mini product cards */
.related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; margin-top: 1rem; }
.related-card { display: block; background: #fff; border: 1px solid rgb(2 28 70 / 0.10); border-radius: var(--radius-card, 14px); overflow: hidden; text-decoration: none; color: inherit; transition: transform 0.15s ease, border-color 0.15s ease; }
.related-card:hover { transform: translateY(-2px); border-color: #37d6e5; }
.related-card img { width: 100%; height: 170px; object-fit: contain; background: #05173a; display: block; }
.related-card__body { padding: 0.85rem 1rem 1rem; }
.related-card__body h4 { margin: 0 0 0.25rem; font-size: 1.02rem; }
.related-card__body p { margin: 0; font-size: var(--text-sm); }

/* phone-size sticky bar - full copy, less chrome (Mason, 13 Aug: squished) */
@media (max-width: 600px) {
  .sticky-bar { gap: 0.9rem; padding: 0.55rem 0.55rem 0.55rem 1rem; bottom: 12px; }
  .sticky-bar__info strong { font-size: var(--text-sm); }
  .sticky-bar__info span { font-size: 0.68rem; }
  .sticky-bar .btn { padding: 0.55rem 1rem; font-size: 0.85rem; white-space: nowrap; }
}