/* ==========================================================================
   Water Quality (WQMS) product page
   Alcodex Technologies

   Page-specific styles only — tokens from variables.css, primitives
   (.container, .btn, .sr-only) from main.css. Self-contained, matching
   the pattern used for the Air Quality page: a couple of small generic
   helpers (.section-eyebrow, .section-intro) are intentionally
   repeated here rather than shared. No new hardcoded colors/spacing/
   radii/shadows — teal is this design system's existing "environmental"
   accent, reused here as the water-inspired accent (see variables.css).
   ========================================================================== */

.section-eyebrow {
  display: inline-block;
  margin-bottom: var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-brand);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.section-intro {
  max-width: var(--container-max-narrow);
  margin-inline: auto;
  text-align: center;
}

.section-intro p {
  margin-top: var(--space-4);
  font-size: var(--text-lg);
}

/* --------------------------------------------------------------------
   Shared reveal (see js/main.js — shared .aq-reveal observer, reused
   as-is on this page too)
   -------------------------------------------------------------------- */

.aq-reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--ease-standard), transform 0.7s var(--ease-standard);
}

.aq-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .aq-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* --------------------------------------------------------------------
   1. Hero
   -------------------------------------------------------------------- */

.wq-hero {
  padding-block: var(--space-section);
  background-color: var(--color-bg-subtle);
  border-bottom: 1px solid var(--color-border);
}

.wq-hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: var(--space-10);
}

@media (min-width: 64rem) {
  .wq-hero-inner {
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--space-16);
  }
}

.wq-hero-content h1 {
  margin-bottom: var(--space-6);
}

.wq-hero-lead {
  max-width: 40rem;
  margin-bottom: var(--space-8);
  font-size: var(--text-lg);
}

.wq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.wq-hero-visual {
  display: flex;
  justify-content: center;
}

.wq-hero-visual-glow {
  position: relative;
  width: 100%;
  max-width: 22rem;
}

.wq-hero-visual-glow::before {
  content: none;
}

.wq-hero-visual-panel {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 22rem;
  aspect-ratio: 1 / 1;
  padding: var(--space-10);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  color: var(--color-accent);
  transition: transform 0.32s var(--ease-standard), box-shadow 0.32s var(--ease-standard);
}

.wq-hero-visual-panel svg {
  width: 100%;
  height: 100%;
}

@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .wq-hero-visual-panel:hover {
    transform: scale(1.01);
    box-shadow: var(--shadow-lg), var(--shadow-lg);
  }
}

.wq-hero-actions {
  transition-delay: 0.1s;
}

.wq-hero-visual-glow {
  transition-duration: 0.85s;
  transition-delay: 0.15s;
}

@media (min-width: 64rem) {
  .wq-hero-visual-glow.aq-reveal {
    transform: translateY(20px) scale(0.96);
  }

  .wq-hero-visual-glow.aq-reveal.is-visible {
    transform: translateY(0) scale(1);
  }
}

/* --------------------------------------------------------------------
   2. Smart Water Monitoring (intro statement + product photo)
   -------------------------------------------------------------------- */

.wq-statement {
  padding-block: var(--space-section);
}

.wq-statement-inner {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: var(--space-10);
}

@media (min-width: 56rem) {
  .wq-statement-inner {
    grid-template-columns: 1.05fr 0.95fr;
    gap: clamp(var(--space-12), 4vw, var(--space-16));
  }
}

.wq-statement-text p {
  margin-top: var(--space-4);
}

.wq-statement-media,
.wq-aquatic-media {
  display: flex;
  justify-content: center;
}

/* --------------------------------------------------------------------
   Shared product-photo card (single genuine image, given a layered
   feel via a decorative CSS shape behind it rather than a second,
   invented photo)
   -------------------------------------------------------------------- */

.wq-media-card {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 22rem;
  padding: var(--space-8);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: box-shadow 0.32s var(--ease-standard);
}

.wq-media-card--aquatic {
  background-color: var(--color-accent-subtle);
}

.wq-media-card::before {
  content: none;
}

.wq-media-layer {
  position: absolute;
  z-index: 0;
  top: -1rem;
  right: -1rem;
  width: 65%;
  height: 65%;
  background-color: var(--color-accent-subtle);
  border-radius: var(--radius-xl);
}

.wq-media-layer--aquatic {
  top: auto;
  right: auto;
  bottom: -1rem;
  left: -1rem;
  width: 55%;
  height: 55%;
  background-color: var(--color-brand-subtle);
  border-radius: var(--radius-full);
}

.wq-media-card img {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 16rem;
  height: auto;
}

@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .wq-media-card:hover {
    box-shadow: var(--shadow-lg);
  }
}

.wq-statement-media.aq-reveal,
.wq-aquatic-media.aq-reveal {
  transform: translateY(22px) scale(0.97);
  transition-duration: 0.75s;
}

.wq-statement-media.aq-reveal.is-visible,
.wq-aquatic-media.aq-reveal.is-visible {
  transform: translateY(0) scale(1);
}

.wq-statement-text.aq-reveal,
.wq-aquatic-text.aq-reveal {
  transition-delay: 0.08s;
}

/* --------------------------------------------------------------------
   3. Aftermarket Retrofit / Alerts — feature grid
   -------------------------------------------------------------------- */

.wq-features {
  padding-block: var(--space-section);
  background-color: var(--color-bg-subtle);
}

.wq-feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: var(--space-6);
  max-width: var(--container-max-narrow);
  margin-inline: auto;
  margin-top: var(--space-12);
}

.wq-feature-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-8);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.wq-feature-card:nth-child(2) {
  transition-delay: 0.1s;
}

.wq-feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  margin-bottom: var(--space-2);
  border-radius: var(--radius-md);
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
}

.wq-feature-card h3 {
  font-size: var(--text-xl);
}

.wq-feature-card p {
  color: var(--color-text-secondary);
}

/* --------------------------------------------------------------------
   4. Large Water Quality visual
   -------------------------------------------------------------------- */

.wq-visual-section {
  padding-block: var(--space-section);
}

.wq-visual-intro {
  margin-bottom: var(--space-12);
}

.wq-visual-card {
  position: relative;
  max-width: 40rem;
  margin-inline: auto;
  padding: var(--space-6);
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition-duration: 0.8s;
}

.wq-visual-card::before {
  content: none;
}

@media (min-width: 40rem) {
  .wq-visual-card {
    max-width: 44rem;
    padding: var(--space-8);
  }
}

.wq-visual-card.aq-reveal {
  transform: translateY(20px) scale(0.97);
}

.wq-visual-card.aq-reveal.is-visible {
  transform: translateY(0) scale(1);
}

.wq-visual-card img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

.wq-visual-caption {
  max-width: var(--container-max-narrow);
  margin: var(--space-8) auto 0;
  text-align: center;
}

.wq-visual-caption p {
  margin-bottom: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.wq-tag-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
  margin: 0;
}

.wq-tag-list li {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
}

/* --------------------------------------------------------------------
   5. Aquatic Life / Water Health (intro statement, reversed rhythm)
   -------------------------------------------------------------------- */

.wq-aquatic {
  padding-block: var(--space-section);
  background-color: var(--color-bg-subtle);
}

.wq-aquatic-inner {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: var(--space-10);
}

.wq-aquatic-text {
  order: 1;
}

.wq-aquatic-media {
  order: 2;
}

.wq-aquatic-text p {
  margin-top: var(--space-4);
}

@media (min-width: 56rem) {
  .wq-aquatic-inner {
    grid-template-columns: 0.95fr 1.05fr;
    gap: clamp(var(--space-12), 4vw, var(--space-16));
  }

  .wq-aquatic-media {
    order: 1;
  }

  .wq-aquatic-text {
    order: 2;
  }
}

/* --------------------------------------------------------------------
   6. Carlson Trophic State Index — single highlight card
   -------------------------------------------------------------------- */

.wq-carlson {
  padding-block: var(--space-section);
}

.wq-carlson-card {
  max-width: var(--container-max-narrow);
  margin: var(--space-12) auto 0;
  padding: var(--space-8);
  text-align: center;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.wq-carlson-card p {
  max-width: 42rem;
  margin: 0 auto var(--space-6);
  color: var(--color-text-secondary);
}

.wq-carlson-formula {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
}

.wq-carlson-formula .wq-tag-list {
  justify-content: center;
}

.wq-carlson-arrow {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.wq-carlson-result {
  padding: var(--space-1) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-inverse);
  background-color: var(--color-accent);
  border-radius: var(--radius-full);
}

/* --------------------------------------------------------------------
   7. Connected Monitoring Flow
   -------------------------------------------------------------------- */

.wq-flow {
  padding-block: var(--space-section);
  background-color: var(--color-bg-subtle);
}

.wq-flow-row {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--space-6);
  max-width: var(--container-max);
  margin-top: var(--space-12);
}

@media (min-width: 64rem) {
  .wq-flow-row {
    flex-direction: row;
    align-items: flex-start;
    gap: 0;
  }
}

.wq-flow-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  text-align: center;
  padding: var(--space-6);
}

.wq-flow-node:nth-child(3) {
  transition-delay: 0.08s;
}

.wq-flow-node:nth-child(5) {
  transition-delay: 0.16s;
}

.wq-flow-node:nth-child(7) {
  transition-delay: 0.24s;
}

@media (min-width: 64rem) {
  .wq-flow-node {
    flex: 1;
  }
}

.wq-flow-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: var(--radius-full);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-accent);
  box-shadow: var(--shadow-sm);
}

.wq-flow-node h3 {
  font-size: var(--text-base);
}

.wq-flow-node p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.wq-flow-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-border-strong);
  transform: rotate(90deg);
}

@media (min-width: 64rem) {
  .wq-flow-connector {
    padding-top: var(--space-6);
    transform: none;
  }
}

/* --------------------------------------------------------------------
   8. Benefits
   -------------------------------------------------------------------- */

.wq-benefits {
  padding-block: var(--space-section);
}

.wq-benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  gap: var(--space-6);
  margin-top: var(--space-12);
}

.wq-benefit-card {
  padding-top: var(--space-4);
  border-top: 3px solid var(--color-accent);
}

.wq-benefit-card:nth-child(2) {
  transition-delay: 0.08s;
}

.wq-benefit-card:nth-child(3) {
  transition-delay: 0.16s;
}

.wq-benefit-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.wq-benefit-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.wq-downloads {
  display: flex;
  justify-content: center;
  margin-top: var(--space-10);
}

.wq-download-link {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-link);
}

.wq-download-link:hover,
.wq-download-link:focus-visible {
  color: var(--color-link-hover);
  text-decoration: underline;
}

/* --------------------------------------------------------------------
   9. Final CTA
   -------------------------------------------------------------------- */

.wq-final-cta {
  padding-block: var(--space-section);
  text-align: center;
  background-color: var(--color-bg-inverse);
}

.wq-final-cta h2 {
  color: var(--color-text-inverse);
}

.wq-final-cta p {
  max-width: 44rem;
  margin-inline: auto;
  margin-top: var(--space-4);
  margin-bottom: var(--space-8);
  color: var(--color-neutral-400);
  font-size: var(--text-lg);
}

/* Readable measurement options and optional assessment detail. */
.wq-measurement-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6);
  margin: 0;
}

.wq-measurement-grid > div {
  min-width: 0;
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-subtle);
}

.wq-measurement-grid dt {
  color: var(--color-text-primary);
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
}

.wq-measurement-grid dd {
  margin: var(--space-3) 0 0;
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

.wq-reading-note {
  max-width: 64rem;
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.wq-reference-link {
  margin-top: var(--space-5);
  font-size: var(--text-sm);
}

.wq-method-detail {
  margin-top: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.wq-method-detail > summary {
  padding: var(--space-5) var(--space-6);
  color: var(--color-brand-hover);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
}

.wq-method-detail[open] > summary {
  border-bottom: 1px solid var(--color-border);
}

.wq-method-detail > div {
  padding: var(--space-6);
}

.wq-method-detail p + p,
.wq-method-detail ul {
  margin-top: var(--space-4);
}

.wq-method-detail ul {
  padding-left: var(--space-5);
  margin-bottom: var(--space-4);
}

.wq-final-cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
}

.wq-final-cta-actions .btn,
.wq-hero-actions .btn {
  max-width: 100%;
  white-space: normal;
  line-height: var(--leading-snug);
}

.wq-flow[id] {
  scroll-margin-top: 7rem;
}

@media (max-width: 47.9375rem) {
  .wq-measurement-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}