/* ==========================================================================
   Solutions 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
   / IoT Platform / Habitat.
   ========================================================================== */

.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)
   -------------------------------------------------------------------- */

.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;
  }
}

/* Directional reveal variants — added on top of .aq-reveal (which
   handles opacity) for alternating left/right entrances. */

.sol-reveal-left {
  transform: translateX(-25px);
  transition: opacity 0.75s var(--ease-standard), transform 0.75s var(--ease-standard);
}

.sol-reveal-left.is-visible {
  transform: translateX(0);
}

.sol-reveal-right {
  transform: translateX(25px);
  transition: opacity 0.75s var(--ease-standard), transform 0.75s var(--ease-standard);
}

.sol-reveal-right.is-visible {
  transform: translateX(0);
}

@media (max-width: 55.999rem) {
  .sol-reveal-left,
  .sol-reveal-right {
    transform: translateY(18px);
  }

  .sol-reveal-left.is-visible,
  .sol-reveal-right.is-visible {
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .sol-reveal-left,
  .sol-reveal-right {
    transform: none;
    transition: none;
  }
}

/* --------------------------------------------------------------------
   Shared genuine-hardware shot card
   -------------------------------------------------------------------- */

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

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

.sol-shot-card-narrow {
  max-width: 18rem;
  margin-inline: auto;
}

.sol-shot-card-tall {
  max-width: 14rem;
  margin-inline: auto;
}

/* --------------------------------------------------------------------
   Shared feature grid (MCU / Connectivity / IP / Security)
   -------------------------------------------------------------------- */

.sol-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-8);
  margin-top: var(--space-12);
}

@media (min-width: 40rem) {
  .sol-grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-10) var(--space-8);
  }
}

@media (min-width: 64rem) {
  .sol-grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-10) var(--space-8);
  }
}

.sol-grid-item:nth-child(2) { transition-delay: 0.06s; }
.sol-grid-item:nth-child(3) { transition-delay: 0.12s; }
.sol-grid-item:nth-child(4) { transition-delay: 0.18s; }
.sol-grid-item:nth-child(5) { transition-delay: 0.24s; }
.sol-grid-item:nth-child(6) { transition-delay: 0.3s; }

.sol-grid-item h3 {
  margin-bottom: var(--space-2);
  font-size: var(--text-base);
}

.sol-grid-item,
.sol-hero-inner > *,
.sol-alt-inner > *,
.sol-controller-inner > * {
  min-width: 0;
}

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

/* --------------------------------------------------------------------
   Shared alternating two-column row (media | text, or text | media)
   -------------------------------------------------------------------- */

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

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

  .sol-alt-inner-reverse {
    grid-template-columns: 1.05fr 0.95fr;
  }
}

.sol-alt-body p {
  margin-bottom: var(--space-4);
}

.sol-alt-body p:last-child {
  margin-bottom: 0;
}

.sol-point {
  margin-bottom: var(--space-6);
}

.sol-point:last-child {
  margin-bottom: 0;
}

.sol-point h3 {
  margin-bottom: var(--space-2);
  font-size: var(--text-lg);
}

.sol-point p {
  color: var(--color-text-secondary);
}

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

.sol-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);
}

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

@media (min-width: 64rem) {
  .sol-hero-inner {
    grid-template-columns: 1.2fr 0.8fr;
    gap: clamp(var(--space-12), 4vw, var(--space-16));
  }
}

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

.sol-hero-lead {
  max-width: 38rem;
  margin-bottom: var(--space-8);
  font-size: var(--text-lg);
}

.sol-hero-note {
  max-width: 38rem;
  margin-bottom: var(--space-8);
  font-size: var(--text-sm);
}

.sol-hero-actions .btn {
  white-space: normal;
  line-height: var(--leading-snug);
}

.sol-applications,
.sol-intelligence,
.sol-deployment,
.sol-faq {
  padding-block: var(--space-section);
}

.sol-intelligence,
.sol-faq {
  background-color: var(--color-bg-subtle);
}

.sol-application-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-8);
  margin-top: var(--space-12);
}

.sol-application {
  min-width: 0;
  padding-top: var(--space-6);
  border-top: 2px solid var(--color-brand);
}

.sol-application h3 {
  margin-bottom: var(--space-3);
  font-size: var(--text-xl);
}

.sol-application a {
  display: inline-block;
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  overflow-wrap: anywhere;
}

.sol-scope-note {
  max-width: 56rem;
  margin: var(--space-8) auto 0;
  font-size: var(--text-sm);
}

.sol-deployment-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-8);
  margin-top: var(--space-12);
  padding: 0;
  list-style: none;
  counter-reset: deployment-step;
}

.sol-deployment-steps li {
  min-width: 0;
  counter-increment: deployment-step;
}

.sol-deployment-steps li::before {
  content: '0' counter(deployment-step);
  display: block;
  margin-bottom: var(--space-4);
  color: var(--color-brand);
  font-weight: var(--font-weight-semibold);
}

.sol-deployment-steps h3 {
  margin-bottom: var(--space-3);
  font-size: var(--text-xl);
}

.sol-faq-inner {
  max-width: 56rem;
}

.sol-faq h2 {
  margin-bottom: var(--space-8);
}

.sol-faq details {
  padding-block: var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.sol-faq summary {
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
}

.sol-faq details p {
  margin-top: var(--space-4);
}

@media (min-width: 48rem) {
  .sol-application-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sol-deployment-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

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

.sol-hero-media {
  max-width: 20rem;
  margin-inline: auto;
}

.sol-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
}

@media (min-width: 64rem) {
  .sol-hero-media {
    max-width: none;
  }
}

/* --------------------------------------------------------------------
   2. Solutions Video (reuses .aq-platform / .aq-video-wrap — the
   generic video pattern already wired in js/main.js)
   -------------------------------------------------------------------- */

.sol-video {
  padding-block: var(--space-section);
}

.sol-video-wrap {
  max-width: 56rem;
  margin: var(--space-12) auto 0;
}

.aq-video-wrap {
  position: relative;
  opacity: 0;
  transform: translateY(20px) scale(0.97);
  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);
  }
}

.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;
  }
}

/* --------------------------------------------------------------------
   3. Envitus Connected Intelligence flow
   -------------------------------------------------------------------- */

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

.sol-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: 56rem) {
  .sol-flow-row {
    flex-direction: row;
    align-items: flex-start;
    gap: 0;
  }
}

.sol-flow-node {
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  text-align: center;
  padding: var(--space-4);
}

.sol-flow-node:nth-child(3) { transition-delay: 0.08s; }
.sol-flow-node:nth-child(5) { transition-delay: 0.16s; }
.sol-flow-node:nth-child(7) { transition-delay: 0.24s; }

@media (min-width: 56rem) {
  .sol-flow-node {
    flex: 1;
  }
}

.sol-flow-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  flex-shrink: 0;
  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);
}

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

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

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

@media (min-width: 56rem) {
  .sol-flow-connector {
    padding-top: var(--space-6);
    transform: none;
  }
}

/* --------------------------------------------------------------------
   4. Universal Controller Boards
   -------------------------------------------------------------------- */

.sol-controller {
  padding-block: var(--space-section);
}
.sol-alt-body > h2 {
    margin-bottom: 24px;
}

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

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

.sol-controller-body p {
  margin-bottom: var(--space-6);
}

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

.sol-mcu {
  margin-top: var(--space-16);
}

.sol-mcu-lead {
  max-width: 48rem;
  margin-inline: auto;
  text-align: center;
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
}

.sol-downloads {
  margin-top: var(--space-16);
  padding-top: var(--space-12);
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.sol-downloads h2 {
  margin-bottom: var(--space-4);
  font-size: var(--text-2xl);
}

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

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

/* --------------------------------------------------------------------
   5. Modular Design
   -------------------------------------------------------------------- */

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

/* --------------------------------------------------------------------
   6. Flexible Connectivity Options
   -------------------------------------------------------------------- */

.sol-connectivity {
  padding-block: var(--space-section);
}

/* Card treatment for the six connectivity capabilities — lightweight,
   not dashboard-style: subtle fill, thin border, consistent heights
   (grid default align-items:stretch handles the equal-height part). */

.sol-conn-card {
  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-sm);
  transition: transform 200ms var(--ease-standard), border-color 200ms var(--ease-standard), box-shadow 200ms var(--ease-standard);
}

@media (hover: hover) and (pointer: fine) {
  .sol-conn-card:hover {
    transform: translateY(-2px);
    border-color: var(--color-border-strong);
    box-shadow: var(--shadow-md);
  }
}

.sol-conn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: var(--space-4);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-brand);
}

@media (prefers-reduced-motion: reduce) {
  .sol-conn-card {
    transition: none;
  }
}

/* LoRa datasheet callout — sits below the full-width grid rather than
   squeezed beside it, so it never stretches the row height. */

.sol-connectivity-callout {
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  max-width: 40rem;
  margin: var(--space-12) auto 0;
  padding: var(--space-6);
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  text-align: center;
}

@media (min-width: 40rem) {
  .sol-connectivity-callout {
    flex-direction: row;
    align-items: center;
    text-align: left;
    max-width: none;
  }
}

.sol-connectivity-callout-media {
  flex-shrink: 0;
  width: 9rem;
  max-width: 100%;
}

.sol-connectivity-callout-body {
  flex: 1;
  min-width: 0;
  overflow-wrap: anywhere;
}

.sol-connectivity-callout .sol-download-link {
  white-space: normal;
}

.sol-document-preview {
  display: grid;
  justify-items: center;
  gap: var(--space-4);
  padding: var(--space-5);
  color: var(--color-brand);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
}

.sol-connectivity-callout-body p {
  margin-top: var(--space-2);
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
}

.sol-connectivity-callout-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------
   7. Flexibility — Central Hub / Daughter Boards
   -------------------------------------------------------------------- */

.sol-flexibility {
  padding-block: var(--space-section);
}
.sol-alt-body > h2 {
    margin-bottom: 24px;
}

/* --------------------------------------------------------------------
   8. IP Protection for Harsh Environments
   -------------------------------------------------------------------- */

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

/* --------------------------------------------------------------------
   9. More Flexibility — Power Options / Sensors
   -------------------------------------------------------------------- */

.sol-power {
  padding-block: var(--space-section);
}
.sol-power .sol-alt-body > h2 {
    margin-bottom: 24px;
}

/* --------------------------------------------------------------------
   10. Security and Data Integrity
   -------------------------------------------------------------------- */

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

.sol-security .section-eyebrow {
  color: var(--color-teal-300);
}

.sol-security h2 {
  color: var(--color-text-inverse);
}

.sol-security .section-intro p {
  color: var(--color-neutral-400);
}

.sol-security .sol-grid-item h3 {
  color: var(--color-text-inverse);
}

.sol-security .sol-grid-item p {
  color: var(--color-neutral-400);
}

/* --------------------------------------------------------------------
   11. Product Connections
   -------------------------------------------------------------------- */

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

.sol-products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr));
  gap: var(--space-6);
  margin-top: var(--space-12);
}

.sol-products-grid > *:nth-child(2) { transition-delay: 0.05s; }
.sol-products-grid > *:nth-child(3) { transition-delay: 0.1s; }
.sol-products-grid > *:nth-child(4) { transition-delay: 0.15s; }
.sol-products-grid > *:nth-child(5) { transition-delay: 0.2s; }

.sol-product-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-6);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.sol-product-card:hover,
.sol-product-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}

.sol-product-card h3 {
  font-size: var(--text-base);
  color: var(--color-text-primary);
}

.sol-product-link {
  flex-shrink: 0;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-link);
  white-space: nowrap;
}

/* --------------------------------------------------------------------
   12. Final CTA
   -------------------------------------------------------------------- */

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

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

.sol-final-cta p {
  max-width: 46rem;
  margin-inline: auto;
  margin-top: var(--space-4);
  margin-bottom: var(--space-8);
  color: var(--color-neutral-400);
  font-size: var(--text-lg);
}

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

/* Component roles and optional technical detail. */
.sol-system-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.sol-system-grid article {
  min-width: 0;
  padding: var(--space-6);
  border-top: 2px solid var(--color-brand);
  background: var(--color-bg);
}

.sol-system-grid h3 {
  font-size: var(--text-xl);
}

.sol-system-grid p {
  margin-top: var(--space-3);
}

.sol-technical {
  padding-block: var(--space-section-sm);
  background: var(--color-bg-subtle);
  scroll-margin-top: 7rem;
}

.sol-technical > .container > .section-intro {
  max-width: 48rem;
  margin-inline: 0;
  text-align: left;
}

.sol-technical-panel {
  margin-top: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}

.sol-technical-panel > summary {
  padding: var(--space-5) var(--space-6);
  cursor: pointer;
  color: var(--color-brand-hover);
  font-weight: var(--font-weight-semibold);
}

.sol-technical-panel[open] > summary {
  border-bottom: 1px solid var(--color-border);
}

.sol-technical-content .container {
  max-width: none;
  padding-inline: clamp(var(--space-4), 3vw, var(--space-8));
}

.sol-technical-content section {
  padding-block: var(--space-10);
}

.sol-technical-content section + section {
  border-top: 1px solid var(--color-border);
}

.sol-technical .sol-controller-body > h3,
.sol-technical .sol-alt-body > h3,
.sol-technical .section-intro > h3 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
}

.sol-technical h4 {
  font-size: var(--text-base);
}

.sol-technical .sol-grid-item h4 {
  margin-bottom: var(--space-2);
}

.sol-technical .sol-point h4 {
  margin-bottom: var(--space-2);
}

.sol-technical .sol-downloads > h3 {
  font-size: var(--text-lg);
}

.sol-applications,
.sol-intelligence,
.sol-flow,
.sol-deployment,
.sol-faq {
  scroll-margin-top: 7rem;
}

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