/* ==========================================================================
   Envitus IoT Platform 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 Air Quality / Water Quality / Precision Farming.
   The hero's video treatment (.aq-platform / .aq-video-wrap / etc.)
   reuses the exact classes and JS already wired up in js/main.js for
   the Air Quality page's video card — copied here rather than shared
   across files, per this project's self-contained-CSS convention, so
   no JS changes were needed. No new hardcoded colors/spacing/radii.
   ========================================================================== */

.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 (text + genuine platform dashboard video)
   -------------------------------------------------------------------- */

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

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

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

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

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

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

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

.iot-hero-content.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --------------------------------------------------------------------
   Video card — ambient glow, premium framing, subtle hover, reveal.
   Same technique as css/air-quality.css's AQI Platform video card;
   class names kept identical so js/main.js's existing video-toggle /
   IntersectionObserver logic (which queries .aq-platform, .aq-platform-
   body, .aq-video-wrap, .aq-platform-video, .aq-video-toggle) works on
   this page with no JS changes.
   -------------------------------------------------------------------- */

.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: 0.24;
    filter: blur(38px);
  }
}

.aq-video-wrap:hover::before {
  opacity: 0.32;
}

.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-video-wrap {
    opacity: 1;
    transform: none;
    transition: none;
  }

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

/* --------------------------------------------------------------------
   2. Core Platform Capabilities — compact grouped grid, not 8
   oversized cards
   -------------------------------------------------------------------- */

.iot-capabilities {
  padding-block: var(--space-section);
}

.iot-capability-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  max-width: var(--container-max);
  margin-top: var(--space-12);
}

@media (min-width: 40rem) {
  .iot-capability-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-10) var(--space-8);
  }
}

@media (min-width: 64rem) {
  .iot-capability-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-10) var(--space-6);
  }
}

.iot-capability-item h3 {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
  font-size: var(--text-base);
}

.iot-capability-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background-color: var(--color-brand-subtle);
  color: var(--color-brand);
}

.iot-capability-item p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* --------------------------------------------------------------------
   Shared screenshot card (genuine platform imagery, framed premium)
   -------------------------------------------------------------------- */

.iot-shot-card {
  position: relative;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  background-color: var(--color-bg);
}

.iot-shot-card img {
  display: block;
  width: 100%;
  height: auto;
}

/* --------------------------------------------------------------------
   3. Device Management
   -------------------------------------------------------------------- */

.iot-device-mgmt {
  padding-block: var(--space-section);
  background-color: var(--color-bg-subtle);
}

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

@media (min-width: 56rem) {
  .iot-device-mgmt-inner {
    grid-template-columns: 1fr 1.1fr;
    gap: clamp(var(--space-12), 4vw, var(--space-16));
  }

  .iot-device-mgmt-media.aq-reveal {
    transform: translateX(-28px);
    transition-duration: 0.8s;
  }

  .iot-device-mgmt-body.aq-reveal {
    transform: translateY(20px);
    transition-delay: 0.15s;
  }

  .iot-device-mgmt-media.aq-reveal.is-visible,
  .iot-device-mgmt-body.aq-reveal.is-visible {
    transform: translateY(0) translateX(0);
  }
}

.iot-device-mgmt-body p {
  margin-bottom: var(--space-4);
}

/* --------------------------------------------------------------------
   4. Remote Diagnostics + OTA (paired statement)
   -------------------------------------------------------------------- */

.iot-diagnostics {
  padding-block: var(--space-section);
}

.iot-diagnostics-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  max-width: var(--container-max-narrow);
  margin-top: var(--space-12);
}

@media (min-width: 48rem) {
  .iot-diagnostics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-10);
  }
}

.iot-diagnostics-item h3 {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  font-size: var(--text-lg);
}

.iot-diagnostics-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
}

.iot-diagnostics-item p {
  color: var(--color-text-secondary);
}

/* --------------------------------------------------------------------
   5. Environmental Quality Index — large, prominent screenshot
   -------------------------------------------------------------------- */

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

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

@media (min-width: 56rem) {
  .iot-eqi-inner {
    grid-template-columns: 0.85fr 1.15fr;
    gap: clamp(var(--space-12), 4vw, var(--space-16));
  }
}

.iot-eqi-body p {
  margin-bottom: var(--space-4);
}

.iot-eqi-media {
  position: relative;
  transition-duration: 0.8s;
}

.iot-eqi-media.aq-reveal {
  transform: translateY(20px) scale(0.97);
}

.iot-eqi-media.aq-reveal.is-visible {
  transform: translateY(0) scale(1);
}

.iot-eqi-media .iot-shot-card {
  box-shadow: var(--shadow-lg);
}

/* --------------------------------------------------------------------
   6. Citizen Mobile App — layered phone composition (two genuine
   screenshots)
   -------------------------------------------------------------------- */

.iot-app {
  padding-block: var(--space-section);
}

.iot-app-inner {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: var(--space-16);
}

@media (min-width: 56rem) {
  .iot-app-inner {
    grid-template-columns: 1fr 0.9fr;
    gap: clamp(var(--space-12), 4vw, var(--space-16));
  }
}

.iot-app-body p {
  margin-bottom: var(--space-6);
}

.iot-app-media {
  position: relative;
  display: flex;
  justify-content: center;
  padding-block: var(--space-6);
  transition-duration: 0.8s;
}

.iot-app-media.aq-reveal {
  transform: translateY(20px) scale(0.97);
}

.iot-app-media.aq-reveal.is-visible {
  transform: translateY(0) scale(1);
}

.iot-phone-shot {
  width: 11rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  background-color: var(--color-bg);
}

.iot-phone-shot img {
  display: block;
  width: 100%;
  height: auto;
}

.iot-phone-shot--back {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-72%) rotate(-4deg);
  z-index: 0;
  opacity: 0.9;
}

.iot-phone-shot--front {
  position: relative;
  z-index: 1;
  transform: translateX(20%) rotate(3deg);
  box-shadow: var(--shadow-lg), var(--shadow-lg);
}

@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .iot-app-media:hover .iot-phone-shot--front {
    transform: translateX(20%) rotate(0deg);
  }

  .iot-app-media:hover .iot-phone-shot--back {
    transform: translateX(-72%) rotate(-2deg);
  }

  .iot-phone-shot {
    transition: transform 0.35s var(--ease-standard);
  }
}

/* --------------------------------------------------------------------
   7. Connected Platform Story (flow diagram)
   -------------------------------------------------------------------- */

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

.iot-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) {
  .iot-flow-row {
    flex-direction: row;
    align-items: flex-start;
    gap: 0;
  }
}

.iot-flow-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  text-align: center;
  padding: var(--space-4);
}

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

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

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

.iot-flow-node:nth-child(9) {
  transition-delay: 0.32s;
}

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

.iot-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-brand);
  box-shadow: var(--shadow-sm);
}

.iot-flow-node h3 {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
}

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

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

/* --------------------------------------------------------------------
   8. Cloud-Agnostic Architecture
   -------------------------------------------------------------------- */

.iot-cloud {
  padding-block: var(--space-section);
}

.iot-cloud-providers {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-8);
  list-style: none;
  padding: 0;
}

.iot-cloud-providers li {
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
}

/* --------------------------------------------------------------------
   9. FAQ accordion (identical markup/behavior to Air Quality's FAQ —
   js/main.js's accordion logic is already generic across .faq-item)
   -------------------------------------------------------------------- */

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

.iot-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;
  }
}

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

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

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

/* --------------------------------------------------------------------
   10. Final CTA
   -------------------------------------------------------------------- */

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

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

.iot-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);
}

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