/* ==========================================================================
   Air Quality (AQMS) product page
   Alcodex Technologies

   Page-specific styles only — tokens from variables.css, primitives
   (.container, .btn, .sr-only) from main.css. Self-contained: this file
   does not depend on home.css, so a couple of small generic patterns
   (.section-eyebrow, .section-intro, the stat-strip) are intentionally
   repeated here rather than shared, to keep this page's footprint
   independent per the brief. No new hardcoded colors/spacing/radii.
   ========================================================================== */

/* --------------------------------------------------------------------
   Shared section helpers (self-contained copies — see file header)
   -------------------------------------------------------------------- */

.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);
}

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

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

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

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

.aq-hero-content {
  text-align: left;
}

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

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

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

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

/* Ambient glow behind the hero product visual — same soft violet/teal
   recipe used behind the AQI Platform video card, kept extremely subtle. */
.aq-hero-visual-glow {
  position: relative;
  width: 100%;
  max-width: 24rem;
}

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

@media (min-width: 64rem) {
  .aq-hero-visual-glow::before {
    inset: -1.5rem;
    opacity: 0.18;
    filter: blur(36px);
  }
}

.aq-hero-visual-panel {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 24rem;
  padding: var(--space-12) var(--space-8);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  transition: transform 0.32s var(--ease-standard), box-shadow 0.32s var(--ease-standard);
}

.aq-hero-visual-panel img {
  width: 100%;
  max-width: 15rem;
  height: auto;
}

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

  .aq-hero-visual-glow:hover::before {
    opacity: 0.26;
  }
}

/* --------------------------------------------------------------------
   Hero scroll reveal (see js/main.js — shared .aq-reveal observer)
   -------------------------------------------------------------------- */

.aq-hero-text,
.aq-hero-actions,
.aq-hero-visual-glow {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s var(--ease-standard), transform 0.7s var(--ease-standard);
}

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

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

@media (min-width: 64rem) {
  .aq-hero-text {
    transform: translateY(22px);
  }

  .aq-hero-actions {
    transform: translateY(22px);
  }

  .aq-hero-visual-glow {
    transform: translateY(20px) scale(0.96);
  }
}

.aq-hero-text.is-visible,
.aq-hero-actions.is-visible,
.aq-hero-visual-glow.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

@media (prefers-reduced-motion: reduce) {
  .aq-hero-text,
  .aq-hero-actions,
  .aq-hero-visual-glow {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* --------------------------------------------------------------------
   2. Verified Impact (stat strip)
   -------------------------------------------------------------------- */

.aq-stats {
  padding-block: var(--space-section-sm);
  background-color: var(--color-brand-subtle);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: var(--space-8);
}

.stat {
  text-align: center;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s var(--ease-standard), transform 0.6s var(--ease-standard);
}

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

.stat-value {
  font-size: var(--text-5xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-brand);
  line-height: var(--leading-tight);
  font-variant-numeric: tabular-nums;
}

.stat-affix {
  font-size: 0.6em;
  font-weight: var(--font-weight-semibold);
}

.stat-label {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.aq-stats-note {
  margin-top: var(--space-8);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

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

/* --------------------------------------------------------------------
   3–4. Ambient / Indoor Air Quality — alternating image/text
   -------------------------------------------------------------------- */

.aq-feature {
  padding-block: var(--space-section);
}

/* Extremely subtle section-to-section tint — Ambient only (Indoor stays
   plain white), just enough to create depth while scrolling. */
.aq-feature--ambient {
  background-color: var(--color-bg-subtle);
}

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

@media (min-width: 56rem) {
  .aq-feature-inner {
    grid-template-columns: 1fr 1fr;
    gap: clamp(var(--space-12), 4vw, var(--space-16));
  }

  .aq-feature--reverse .aq-feature-media {
    order: 2;
  }
}

.aq-feature-media {
  position: relative;
  display: flex;
  justify-content: center;
  transition-property: opacity, transform, box-shadow;
  transition-duration: 0.32s;
  transition-timing-function: var(--ease-standard);
}

/* Hover interactions should always animate quickly (0.32-0.35s),
   independent of whatever duration the scroll-reveal below is using
   for its own (one-time, slower) entrance transition. Specificity
   (.aq-feature-media.aq-reveal:hover) is deliberately higher than the
   plain ".aq-feature-media.aq-reveal" reveal rule so this always wins
   once the element is revealed and hovered. */
@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .aq-feature-media.aq-reveal:hover {
    transition-duration: 0.32s;
  }
}

/* Indoor (default): plain product shot gets a shadow + a restrained
   ambient glow behind it, matching the video card's visual language. */
.aq-feature-media::before {
  content: none;
}

@media (min-width: 56rem) {
  .aq-feature-media::before {
    inset: -1rem;
    opacity: 0.16;
    filter: blur(30px);
  }
}

.aq-feature-media img {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 22rem;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* Ambient: deliberate tinted media container instead of a bare glow —
   the real deployment photo sits inside a large rounded, bordered card. */
.aq-feature--ambient .aq-feature-media {
  padding: var(--space-6);
  background-color: var(--color-brand-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

.aq-feature--ambient .aq-feature-media::before {
  display: none;
}

.aq-feature--ambient .aq-feature-media img {
  box-shadow: none;
}

@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  /* Specificity matches/beats .aq-feature-media.aq-reveal.is-visible's
     own transform declaration, so the hover scale actually applies
     once the element has settled into its revealed resting state. */
  .aq-feature-media.aq-reveal.is-visible:hover {
    transform: scale(1.01);
  }

  .aq-feature-media:hover::before {
    opacity: 0.22;
  }

  .aq-feature--ambient .aq-feature-media:hover {
    box-shadow: var(--shadow-lg);
  }
}

.aq-feature-body p {
  margin-bottom: var(--space-4);
}

/* --------------------------------------------------------------------
   Ambient/Indoor scroll reveal (see js/main.js — shared .aq-reveal
   observer). Whichever column reads first (left) leads; the other
   follows with a slight delay — Ambient: image leads, text follows.
   Indoor (.aq-feature--reverse): text leads, image follows.
   -------------------------------------------------------------------- */

.aq-feature-body.aq-reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s var(--ease-standard), transform 0.7s var(--ease-standard);
}

/* Longhand + duration-only override (not the shorthand) so this keeps
   the base .aq-feature-media rule's transition-property list
   (opacity, transform, box-shadow) intact for the later hover state. */
.aq-feature-media.aq-reveal {
  opacity: 0;
  transform: translateY(14px);
  transition-duration: 0.7s;
}

@media (min-width: 56rem) {
  .aq-feature-media.aq-reveal {
    transform: translateX(-30px);
    transition-duration: 0.8s;
  }

  .aq-feature-body.aq-reveal {
    transform: translateY(20px);
    transition-duration: 0.7s;
    transition-delay: 0.15s;
  }

  .aq-feature--reverse .aq-feature-media.aq-reveal {
    transform: translateX(28px) scale(0.97);
    transition-delay: 0.15s;
  }

  .aq-feature--reverse .aq-feature-body.aq-reveal {
    transition-delay: 0s;
  }
}

.aq-feature-media.aq-reveal.is-visible,
.aq-feature-body.aq-reveal.is-visible {
  opacity: 1;
  transform: translateY(0) translateX(0) scale(1);
}

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

/* --------------------------------------------------------------------
   5. Customize Your AQMS
   -------------------------------------------------------------------- */

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

.aq-customize-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: var(--space-6);
  margin-top: var(--space-12);
}

.aq-customize-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.aq-customize-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  margin-bottom: var(--space-2);
  border-radius: var(--radius-md);
  background-color: var(--color-brand-subtle);
  color: var(--color-brand);
}

.aq-customize-card h3 {
  font-size: var(--text-xl);
}

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

.aq-customize-note {
  font-style: italic;
  color: var(--color-text-muted);
}

.aq-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  margin-top: var(--space-2);
  padding: 0;
}

.aq-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);
}

.aq-customize-card .aq-tag-list li {
  background-color: var(--color-bg-subtle);
}

.aq-downloads {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4) var(--space-8);
  margin-top: var(--space-10);
}

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

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

/* --------------------------------------------------------------------
   6. Measurement Capabilities
   -------------------------------------------------------------------- */

.aq-parameters {
  padding-block: var(--space-section);
}

.aq-parameters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: var(--space-8);
  margin-top: var(--space-12);
}

.aq-parameter-group h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-1);
}

.aq-parameter-caveat {
  display: block;
  font-size: var(--text-xs);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-muted);
  text-transform: none;
  letter-spacing: normal;
}

.aq-parameter-group .aq-tag-list {
  margin-top: var(--space-4);
}

.aq-tag-list--core li {
  color: var(--color-text-inverse);
  background-color: var(--color-brand);
  border-color: var(--color-brand);
}

/* --------------------------------------------------------------------
   7. Deployment Journey (timeline)
   -------------------------------------------------------------------- */

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

.aq-timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-top: var(--space-12);
  padding: 0;
  list-style: none;
}

.aq-timeline-item {
  position: relative;
  padding-left: var(--space-6);
  border-left: 2px solid var(--color-border-strong);
}

.aq-timeline-item::before {
  content: "";
  position: absolute;
  left: -0.375rem;
  top: 0.25rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background-color: var(--color-brand);
}

.aq-timeline-year {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-brand);
  letter-spacing: var(--tracking-wide);
}

.aq-timeline-detail {
  margin-top: var(--space-1);
  color: var(--color-text-secondary);
}

@media (min-width: 64rem) {
  .aq-timeline {
    flex-direction: row;
    gap: 0;
  }

  .aq-timeline-item {
    flex: 1;
    padding-left: 0;
    padding-top: var(--space-6);
    border-left: none;
    border-top: 2px solid var(--color-border-strong);
  }

  .aq-timeline-item::before {
    left: 0.25rem;
    top: -0.375rem;
  }

  .aq-timeline-item + .aq-timeline-item {
    margin-left: var(--space-6);
  }
}

/* --------------------------------------------------------------------
   8. Platform (AQI analysis)
   -------------------------------------------------------------------- */

.aq-platform {
  padding-top: var(--space-section);
  padding-bottom: var(--space-section-sm);
}

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

@media (min-width: 64rem) {
  .aq-platform-inner {
    grid-template-columns: 1.05fr 0.95fr;
    gap: clamp(var(--space-12), 4vw, var(--space-16));
  }
}

.aq-platform-media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.aq-platform-body p {
  margin-bottom: var(--space-4);
}

/* Text column reveal (see js/main.js) */
.aq-platform-body {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease-standard), transform 0.7s var(--ease-standard);
}

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

/* --------------------------------------------------------------------
   Video card — ambient glow, premium framing, subtle hover, reveal.
   -------------------------------------------------------------------- */

.aq-video-wrap {
  position: relative;
  opacity: 0;
  transform: translateY(25px) scale(0.96);
  transition: opacity 0.8s var(--ease-standard) 0.12s,
              transform 0.8s var(--ease-standard) 0.12s;
}

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

.aq-video-wrap::before {
  content: none;
}

@media (min-width: 64rem) {
  .aq-video-wrap::before {
    inset: -1.5rem;
    opacity: 0.22;
    filter: blur(36px);
  }
}

.aq-video-wrap:hover::before {
  opacity: 0.3;
}

.aq-video-card {
  position: relative;
  z-index: 1;
  overflow: hidden;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  background-color: var(--color-bg);
  transition: transform 0.35s var(--ease-standard), box-shadow 0.35s var(--ease-standard);
}

.aq-video-card video {
  display: block;
  width: 100%;
  height: auto;
}

@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .aq-video-card:hover {
    transform: scale(1.01);
    box-shadow: var(--shadow-lg), var(--shadow-lg);
  }
}

.aq-video-toggle {
  position: absolute;
  right: var(--space-3);
  bottom: var(--space-3);
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--space-10);
  height: var(--space-10);
  color: var(--color-text-inverse);
  background-color: var(--color-neutral-950);
  border-radius: var(--radius-full);
  transition: background-color var(--transition-fast);
}

.aq-video-toggle:hover,
.aq-video-toggle:focus-visible {
  background-color: var(--color-neutral-800);
}

.aq-video-icon-play {
  display: none;
}

.aq-video-toggle.is-paused .aq-video-icon-play {
  display: block;
}

.aq-video-toggle.is-paused .aq-video-icon-pause {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  .aq-platform-body,
  .aq-video-wrap {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .aq-video-card {
    transition: none;
  }
}

.aq-platform-points {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: var(--space-6);
  margin-block: var(--space-6);
}

.aq-platform-points h3 {
  font-size: var(--text-base);
  margin-bottom: var(--space-1);
}

.aq-platform-points p {
  font-size: var(--text-sm);
  margin-bottom: 0;
}

.aq-platform-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* --------------------------------------------------------------------
   9. Universal Controller Board
   -------------------------------------------------------------------- */

.aq-controller {
  padding-block: var(--space-section);
  background-color: var(--color-bg-inverse);
}

.aq-controller .section-eyebrow {
  color: var(--color-teal-300);
}

.aq-controller h2,
.aq-controller h3 {
  color: var(--color-text-inverse);
}

.aq-controller-body p {
  color: var(--color-neutral-400);
  margin-bottom: var(--space-4);
}

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

@media (min-width: 56rem) {
  .aq-controller-inner {
    grid-template-columns: 0.9fr 1.1fr;
    gap: clamp(var(--space-12), 4vw, var(--space-16));
  }
}

.aq-controller-media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

.aq-controller-body h3 {
  font-size: var(--text-lg);
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
}

.aq-controller-actions {
  margin-top: var(--space-6);
}

/* --------------------------------------------------------------------
   10. FAQ accordion
   -------------------------------------------------------------------- */

.aq-faq {
  padding-block: var(--space-section);
}

.aq-faq-list {
  max-width: var(--container-max-narrow);
  margin-inline: auto;
  margin-top: var(--space-12);
  border-top: 1px solid var(--color-border);
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item h3 {
  margin: 0;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
  padding-block: var(--space-5);
  text-align: left;
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.faq-icon {
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
}

.faq-question[aria-expanded="true"] .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding-bottom: var(--space-5);
  padding-right: var(--space-8);
  color: var(--color-text-secondary);
}

@media (prefers-reduced-motion: reduce) {
  .faq-icon {
    transition: none;
  }
}

/* --------------------------------------------------------------------
   11. Final CTA
   -------------------------------------------------------------------- */

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

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

.aq-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);
}

.aq-data-quality {
  border-top: 1px solid var(--color-border);
}

.aq-guidance-link {
  margin-top: var(--space-6);
  font-size: var(--text-sm);
}

.aq-customize-card .aq-customize-note + .aq-tag-list {
  margin-top: var(--space-2);
}

.aq-parameters-grid .aq-tag-list li {
  white-space: normal;
  line-height: var(--leading-snug);
}