/**
 * HWiNFO — Developer Rebrand Theme
 * Dark atmospheric diagnostic aesthetic with light content panels.
 * Class names: hwinfo-dev rebrand mapping (see project docs).
 */

@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ==========================================================================
   Design tokens
   ========================================================================== */

:root {
  --bg-deep: #03070D;
  --bg-secondary: #07111C;
  --bg-raised: #0A1724;
  --bg-panel: #0D1E2D;
  --blue-primary: #169CFF;
  --cyan-bright: #40C7FF;
  --blue-soft: #74BFFF;
  --text-main: #F3F8FC;
  --text-muted: #8FA8BB;
  --border-tech: rgba(96, 174, 230, 0.18);

  /* Semantic aliases (Tailwind / legacy var bridge) */
  --color-bg-base: var(--bg-deep);
  --color-bg-surface: var(--bg-secondary);
  --color-bg-elevated: var(--bg-raised);
  --color-text-primary: var(--text-main);
  --color-text-muted: var(--text-muted);
  --color-brand: var(--blue-primary);
  --color-accent: var(--cyan-bright);
  --color-border: var(--border-tech);

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Manrope', system-ui, sans-serif;

  --nav-height: 4rem;
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --shadow-panel: 0 4px 24px rgba(0, 0, 0, 0.35);
  --shadow-lift: 0 12px 40px rgba(22, 156, 255, 0.12), 0 4px 16px rgba(0, 0, 0, 0.25);
  --transition-fast: 0.2s ease;
  --transition-med: 0.35s ease;
}

/* ==========================================================================
   Base & atmospheric background
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--text-main);
  background-color: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  min-height: 100vh;
}

/* Subtle animated grid + particles + radial glows (CSS only) */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 80% 50% at 15% 10%, rgba(22, 156, 255, 0.09) 0%, transparent 55%),
    radial-gradient(ellipse 60% 45% at 85% 75%, rgba(64, 199, 255, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 50% 100%, rgba(10, 23, 36, 0.95) 0%, var(--bg-deep) 70%);
  pointer-events: none;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(64, 199, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(64, 199, 255, 0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 80% at 50% 30%, black 15%, transparent 80%);
  animation: ambient-grid-drift 48s linear infinite;
  pointer-events: none;
}

@keyframes ambient-grid-drift {
  0% { background-position: 0 0, 0 0; }
  100% { background-position: 64px 64px, 64px 64px; }
}

h1, h2, h3, h4, h5, h6,
.font-display {
  font-family: var(--font-display);
}

a {
  color: inherit;
  text-decoration: none;
}

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Focus states */
.action-btn-primary:focus-visible,
.action-btn-release:focus-visible,
.action-btn-outline:focus-visible,
.locale-dropdown-btn:focus-visible,
.nav-toggle-btn:focus-visible,
.nav-close-btn:focus-visible,
.faq-panel-trigger:focus-visible,
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--cyan-bright);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   Top navigation
   ========================================================================== */

#top-nav-wrapper,
.top-nav-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg-deep) 72%, transparent);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#top-nav-wrapper.top-nav-fixed,
.top-nav-wrapper.top-nav-fixed {
  background: color-mix(in srgb, var(--bg-secondary) 94%, transparent);
  border-bottom-color: var(--border-tech);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
}

#top-nav-wrapper .scan-line-decor,
.top-nav-wrapper .scan-line-decor {
  position: relative;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--border-tech) 10%,
    var(--border-tech) 90%,
    transparent
  );
  overflow: hidden;
}

#top-nav-wrapper .scan-line-decor::after,
.top-nav-wrapper .scan-line-decor::after {
  content: '';
  position: absolute;
  top: -1px;
  left: -30%;
  width: 30%;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--cyan-bright), transparent);
  animation: scan-line-slide 8s linear infinite;
}

@keyframes scan-line-slide {
  0% { left: -30%; }
  100% { left: 100%; }
}

/* ==========================================================================
   Section divider (telemetry scan line between sections)
   ========================================================================== */

.section-divider {
  position: relative;
  height: 2px;
  margin: 0;
  border: none;
  background: linear-gradient(
    90deg,
    transparent,
    var(--border-tech) 8%,
    var(--border-tech) 92%,
    transparent
  );
  overflow: hidden;
}

.section-divider::after {
  content: '';
  position: absolute;
  top: -1px;
  left: -25%;
  width: 25%;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--blue-primary), transparent);
  animation: scan-line-slide 10s linear infinite;
}

.content-panel-light + .content-panel-muted,
.content-panel-muted + .content-panel-light,
.content-panel-light + .content-panel-light,
.content-panel-muted + .content-panel-muted {
  border-top: none;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.action-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--blue-primary) 0%, color-mix(in srgb, var(--blue-primary) 80%, var(--cyan-bright)) 100%);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 600;
  border: 1px solid color-mix(in srgb, var(--cyan-bright) 35%, transparent);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  cursor: pointer;
}

.action-btn-primary:hover {
  background: linear-gradient(135deg, color-mix(in srgb, var(--blue-primary) 88%, var(--cyan-bright)) 0%, var(--blue-primary) 100%);
  box-shadow: 0 0 20px rgba(22, 156, 255, 0.35);
  transform: translateY(-1px);
}

.action-btn-release {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #3d9e00 0%, #5cb800 100%);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 600;
  border: 1px solid rgba(92, 184, 0, 0.45);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  cursor: pointer;
}

.action-btn-release:hover {
  background: linear-gradient(135deg, #358800 0%, #4fa000 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(92, 184, 0, 0.35), 0 0 20px rgba(92, 184, 0, 0.15);
}

.action-btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--text-main);
  font-family: var(--font-display);
  font-weight: 500;
  border: 1px solid var(--border-tech);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
  cursor: pointer;
}

.action-btn-outline:hover {
  border-color: color-mix(in srgb, var(--cyan-bright) 50%, var(--border-tech));
  background: rgba(64, 199, 255, 0.06);
  color: var(--cyan-bright);
}

/* Light panel context */
.content-panel-light .action-btn-outline,
.content-panel-muted .action-btn-outline {
  color: var(--text-main);
  border-color: var(--border-tech);
}

.content-panel-light .action-btn-outline:hover,
.content-panel-muted .action-btn-outline:hover {
  border-color: color-mix(in srgb, var(--cyan-bright) 50%, var(--border-tech));
  background: rgba(64, 199, 255, 0.08);
  color: var(--cyan-bright);
}

/* ==========================================================================
   Locale dropdown
   ========================================================================== */

.locale-dropdown {
  position: relative;
}

.locale-dropdown-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.625rem;
  font-size: 0.8125rem;
  font-family: var(--font-display);
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-tech);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.locale-dropdown-btn:hover,
.locale-dropdown.is-open .locale-dropdown-btn {
  border-color: color-mix(in srgb, var(--cyan-bright) 45%, var(--border-tech));
  background: rgba(64, 199, 255, 0.08);
}

.locale-dropdown-chevron {
  transition: transform var(--transition-fast);
}

.locale-dropdown.is-open .locale-dropdown-chevron {
  transform: rotate(180deg);
}

.locale-dropdown-menu {
  position: absolute;
  top: calc(100% + 0.375rem);
  right: 0;
  min-width: 10.5rem;
  margin: 0;
  padding: 0.375rem 0;
  list-style: none;
  background: var(--bg-panel);
  border: 1px solid var(--border-tech);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-panel);
  z-index: 60;
}

.locale-dropdown-menu li a {
  display: block;
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s, background 0.15s;
}

.locale-dropdown-menu li a:hover,
.locale-dropdown-menu li[aria-current="true"] a {
  color: var(--cyan-bright);
  background: rgba(64, 199, 255, 0.08);
}

.lang-footer-links a {
  margin: 0 0.25rem;
}

/* ==========================================================================
   Mobile navigation overlay
   ========================================================================== */

.nav-overlay-mobile {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: var(--bg-deep);
  display: flex;
  flex-direction: column;
}

.nav-overlay-mobile.hidden {
  display: none;
}

.nav-toggle-btn,
.nav-close-btn {
  cursor: pointer;
  background: transparent;
  border: none;
  color: var(--text-main);
  padding: 0.5rem;
}

/* ==========================================================================
   Hero / diagnostic banner
   ========================================================================== */

.diag-banner-shell,
.inner-banner-shell {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-secondary) 55%, var(--bg-raised) 100%);
}

.diag-banner-shell {
  color: var(--text-main);
}

.inner-banner-shell {
  color: var(--text-main);
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-secondary) 100%);
}

/* Extend hero behind fixed navbar */
main.pt-16 > .diag-banner-shell:first-child,
main.pt-16 > .inner-banner-shell:first-child {
  margin-top: calc(-1 * var(--nav-height));
  padding-top: var(--nav-height);
}

.diag-banner-media {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}

.diag-banner-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: 0;
}

.diag-banner-shade {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    180deg,
    rgba(3, 7, 13, 0.2) 0%,
    rgba(7, 17, 28, 0.45) 50%,
    rgba(10, 23, 36, 0.65) 100%
  );
  pointer-events: none;
}

/* Homepage hero — cinematic fade into light content */
.diag-banner-home .diag-banner-shade {
  background: linear-gradient(
    180deg,
    rgba(3, 7, 13, 0.35) 0%,
    rgba(7, 17, 28, 0.55) 40%,
    rgba(10, 23, 36, 0.82) 70%,
    rgba(10, 23, 36, 0.96) 100%
  );
}

.diag-banner-home .diag-banner-video {
  opacity: 1;
}

.diag-banner-fx {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  overflow: hidden;
}

/* Glow effects */
.fx-glow-1,
.fx-glow-2,
.fx-glow-3 {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.42;
  animation: fx-glow-drift 14s ease-in-out infinite alternate;
}

.fx-glow-1 {
  width: 440px;
  height: 440px;
  top: 5%;
  left: 10%;
  background: radial-gradient(circle, rgba(64, 199, 255, 0.55), transparent 68%);
}

.fx-glow-2 {
  width: 380px;
  height: 380px;
  bottom: 15%;
  right: 8%;
  background: radial-gradient(circle, rgba(22, 156, 255, 0.4), transparent 68%);
  animation-delay: -7s;
}

.fx-glow-3 {
  width: 280px;
  height: 280px;
  top: 40%;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(116, 191, 255, 0.35), transparent 70%);
  animation-delay: -3s;
  opacity: 0.28;
}

@keyframes fx-glow-drift {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(24px, -18px) scale(1.06); }
}

.fx-glow-3 {
  animation-name: fx-glow-drift-center;
}

@keyframes fx-glow-drift-center {
  0% { transform: translateX(-50%) translate(0, 0) scale(1); }
  100% { transform: translateX(-50%) translate(24px, -18px) scale(1.06); }
}

.fx-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(64, 199, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(64, 199, 255, 0.045) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(ellipse 85% 75% at 50% 35%, black 20%, transparent 75%);
}

.fx-scan {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(64, 199, 255, 0.07) 50%, transparent 100%);
  background-size: 100% 220%;
  animation: fx-scan-sweep 8s linear infinite;
  opacity: 0.55;
}

@keyframes fx-scan-sweep {
  0% { background-position: 0 -100%; }
  100% { background-position: 0 200%; }
}

.diag-banner-copy {
  position: relative;
  z-index: 10;
}

.diag-banner-home .diag-banner-copy h1 {
  animation: banner-fade-up 0.85s ease-out both;
  text-shadow: 0 2px 28px rgba(0, 0, 0, 0.45);
}

.diag-banner-home .diag-banner-copy p {
  animation: banner-fade-up 0.85s ease-out 0.1s both;
}

.diag-banner-home .diag-banner-cta {
  animation: banner-fade-up 0.85s ease-out 0.22s both;
}

.diag-banner-home .action-btn-release {
  box-shadow: 0 4px 28px rgba(92, 184, 0, 0.4);
}

@keyframes banner-fade-up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Laptop bridge / device showcase */
.diag-banner-device,
.hero-laptop-bridge {
  position: relative;
  z-index: 10;
  display: flex;
  justify-content: center;
  margin-top: 1.75rem;
  margin-bottom: 0;
  padding: 0 1rem 2.5rem;
}

.diag-banner-home .diag-banner-device,
.diag-banner-home .hero-laptop-bridge {
  margin-top: 2rem;
  padding-bottom: 3rem;
}

@media (min-width: 640px) {
  .diag-banner-home .diag-banner-device,
  .diag-banner-home .hero-laptop-bridge {
    margin-top: 2.5rem;
    padding-bottom: 3.5rem;
  }
}

@media (min-width: 1024px) {
  .diag-banner-home .diag-banner-device,
  .diag-banner-home .hero-laptop-bridge {
    margin-top: 3rem;
    padding-bottom: 4rem;
  }
}

.diag-banner-device-img {
  width: min(38vw, 520px);
  max-width: 520px;
  min-width: 240px;
  height: auto;
  display: block;
  filter:
    drop-shadow(0 22px 44px rgba(0, 0, 0, 0.38))
    drop-shadow(0 0 48px rgba(64, 199, 255, 0.12));
  animation: device-float 5.5s ease-in-out infinite;
}

@media (min-width: 1024px) {
  .diag-banner-device-img {
    width: min(36vw, 520px);
  }
}

@keyframes device-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ==========================================================================
   Page content shell
   ========================================================================== */

.page-content-shell {
  background: var(--bg-deep);
  color: var(--text-main);
}

/* ==========================================================================
   Content panels (dark diagnostic surfaces)
   ========================================================================== */

.content-panel-light {
  background: var(--bg-raised);
  color: var(--text-main);
  position: relative;
}

.content-panel-muted {
  background: var(--bg-secondary);
  color: var(--text-main);
  position: relative;
}

/* Dark-to-content transition on first panel after hero */
.diag-banner-home + .content-panel-light,
.inner-banner-shell + .content-panel-light,
.diag-banner-shell + .content-panel-light {
  padding-top: clamp(3rem, 6vw, 5rem);
  margin-top: 0;
  box-shadow: none;
}

.content-panel-light .text-gray-600,
.content-panel-muted .text-gray-600,
.page-content-shell .text-gray-600 {
  color: var(--text-muted);
}

.content-panel-light .text-gray-700,
.content-panel-muted .text-gray-700 {
  color: color-mix(in srgb, var(--text-main) 88%, var(--text-muted));
}

.content-panel-light .text-gray-500,
.content-panel-muted .text-gray-500 {
  color: var(--text-muted);
}

.content-panel-light .border-gray-200,
.content-panel-muted .border-gray-200,
.content-panel-light .border-gray-300,
.content-panel-muted .border-gray-300 {
  border-color: var(--border-tech);
}

.content-panel-light .bg-white,
.content-panel-muted .bg-white {
  background: var(--bg-panel) !important;
}

.content-panel-light .hover\:bg-gray-50:hover,
.content-panel-muted .hover\:bg-gray-50:hover {
  background: rgba(64, 199, 255, 0.06) !important;
}

.content-panel-light .text-gray-700.font-medium,
.content-panel-muted .text-gray-700.font-medium {
  color: var(--text-main);
}

/* ==========================================================================
   Typography & section headings
   ========================================================================== */

.field-label-tech {
  font-family: var(--font-display);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--blue-primary);
}

.content-panel-light .field-label-tech,
.content-panel-muted .field-label-tech,
.page-content-shell .field-label-tech {
  color: var(--blue-primary);
}

.section-heading {
  color: var(--text-main);
  text-align: center;
}

.section-heading-wrap {
  text-align: center;
  margin-bottom: 3rem;
}

.section-heading-wrap .field-label-tech {
  display: block;
}

.content-panel-light > div > .field-label-tech,
.content-panel-muted > div > .field-label-tech {
  text-align: center;
  display: block;
}

.card-heading {
  color: var(--cyan-bright);
  text-align: center;
}

.content-heading {
  color: #1a1a1a;
}

.text-secondary {
  color: #5a7288;
}

.text-link-accent {
  color: var(--blue-primary);
  transition: color var(--transition-fast);
}

.text-link-accent:hover {
  color: color-mix(in srgb, var(--blue-primary) 75%, var(--cyan-bright));
  text-decoration: underline;
}

/* Centered headings in content areas */
.diag-banner-shell h1,
.inner-banner-shell h1,
.page-content-shell h1:not(.sr-only),
.page-content-shell h2:not(.sr-only),
.page-content-shell h3,
.content-panel-light h1:not(.sr-only),
.content-panel-light h2:not(.sr-only),
.content-panel-light h3,
.content-panel-muted h1:not(.sr-only),
.content-panel-muted h2:not(.sr-only),
.content-panel-muted h3 {
  text-align: center;
}

.page-content-shell h2.flex,
.content-panel-light h2.flex,
.content-panel-muted h2.flex {
  justify-content: center;
}

footer h3,
.spec-data-grid th {
  text-align: left;
}

/* ==========================================================================
   Sensor panels (feature cards)
   ========================================================================== */

.sensor-panel {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--border-tech);
  border-radius: var(--radius-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
  overflow: hidden;
}

.sensor-panel::before,
.sensor-panel::after {
  content: '';
  position: absolute;
  width: 10px;
  height: 10px;
  pointer-events: none;
  transition: border-color var(--transition-fast);
}

.sensor-panel::before {
  top: 0;
  left: 0;
  border-top: 1px solid var(--cyan-bright);
  border-left: 1px solid var(--cyan-bright);
}

.sensor-panel::after {
  bottom: 0;
  right: 0;
  border-bottom: 1px solid var(--cyan-bright);
  border-right: 1px solid var(--cyan-bright);
}

.sensor-panel:hover {
  transform: translateY(-4px);
  border-color: rgba(64, 199, 255, 0.35);
  box-shadow: var(--shadow-lift);
}

/* Edge light animation on hover */
.sensor-panel:hover::before {
  animation: edge-pulse-tl 1.2s ease-out;
}

.sensor-panel:hover::after {
  animation: edge-pulse-br 1.2s ease-out 0.15s;
}

@keyframes edge-pulse-tl {
  0% { box-shadow: 0 0 0 0 rgba(64, 199, 255, 0.6); }
  100% { box-shadow: 0 0 12px 2px rgba(64, 199, 255, 0); }
}

@keyframes edge-pulse-br {
  0% { box-shadow: 0 0 0 0 rgba(22, 156, 255, 0.5); }
  100% { box-shadow: 0 0 12px 2px rgba(22, 156, 255, 0); }
}

.page-content-shell .sensor-panel,
.content-panel-light .sensor-panel,
.content-panel-muted .sensor-panel {
  background: var(--bg-panel);
  color: var(--text-main);
}

.page-content-shell .sensor-panel h2,
.page-content-shell .sensor-panel h3,
.content-panel-light .sensor-panel h2,
.content-panel-light .sensor-panel h3,
.content-panel-muted .sensor-panel h2,
.content-panel-muted .sensor-panel h3 {
  color: var(--text-main);
}

.page-content-shell .sensor-panel p,
.content-panel-light .sensor-panel p,
.content-panel-muted .sensor-panel p {
  color: var(--text-muted);
}

/* Dark tech panel variant */
.tech-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-tech);
  position: relative;
}

.tech-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 8px;
  height: 8px;
  border-top: 1px solid var(--cyan-bright);
  border-left: 1px solid var(--cyan-bright);
}

.tech-panel:hover {
  border-color: color-mix(in srgb, var(--cyan-bright) 40%, var(--border-tech));
}

/* ==========================================================================
   Data tables & metric strips
   ========================================================================== */

.spec-data-grid {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.spec-data-grid th,
.spec-data-grid td {
  border: 1px solid var(--border-tech);
  padding: 0.75rem 1rem;
  text-align: left;
}

.spec-data-grid th {
  background: var(--bg-panel);
  color: var(--text-main);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.spec-data-grid tr:nth-child(even) td {
  background: rgba(64, 199, 255, 0.03);
}

.spec-data-grid td {
  color: var(--text-muted);
}

.metric-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font-size: 0.75rem;
  font-family: var(--font-display);
  color: var(--text-muted);
  border: 1px solid var(--border-tech);
  background: var(--bg-panel);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
}

.metric-strip span span {
  color: var(--blue-primary);
}

.accent-border {
  border-left: 2px solid var(--blue-primary);
  padding-left: 1.25rem;
}

/* ==========================================================================
   Breadcrumbs & TOC
   ========================================================================== */

.crumb-trail {
  color: #94a3b8;
}

.crumb-trail a {
  color: #94a3b8;
}

.crumb-trail a:hover {
  color: #fff;
}

.crumb-trail-light {
  background: #fff;
  border-bottom: 1px solid rgba(26, 48, 72, 0.12);
  color: #5a7288;
}

.crumb-trail-light a {
  color: var(--blue-primary);
}

.crumb-trail-light a:hover {
  text-decoration: underline;
}

.crumb-trail ol,
.breadcrumbs ol {
  list-style: none;
  padding: 0;
  margin: 0;
}

.guide-toc {
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-tech);
}

.guide-toc a,
.toc-nav a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.guide-toc a:hover,
.toc-nav a:hover {
  color: var(--blue-primary);
}

/* ==========================================================================
   Demo window chrome
   ========================================================================== */

.demo-window,
.window-chrome {
  border: 1px solid var(--border-tech);
  background: var(--bg-panel);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.demo-window-bar,
.window-chrome-bar {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-tech);
  padding: 0.5rem 0.75rem;
  display: flex;
  gap: 0.375rem;
  align-items: center;
}

.demo-window-dot,
.window-chrome-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--border-tech);
}

.window-chrome {
  border-color: var(--border-tech);
  background: var(--bg-raised);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--blue-primary) 15%, transparent);
}

.window-chrome-bar {
  background: var(--bg-secondary);
  border-bottom-color: var(--border-tech);
}

.window-chrome-dot {
  background: var(--border-tech);
}

/* ==========================================================================
   Step rail & timeline
   ========================================================================== */

.step-track {
  counter-reset: step-counter;
}

.step-track li {
  counter-increment: step-counter;
  position: relative;
  padding-left: 3rem;
}

.step-track li::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 0;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--blue-primary);
  border: 1px solid rgba(22, 156, 255, 0.2);
  background: #fff;
}

.page-content-shell .step-track > li.sensor-panel,
.content-panel-light .step-track > li.sensor-panel {
  color: #2a3f52;
}

.page-content-shell .step-track > li.sensor-panel > h2,
.content-panel-light .step-track > li.sensor-panel > h2 {
  color: #0a1e32;
}

.page-content-shell .step-track > li.sensor-panel > p,
.content-panel-light .step-track > li.sensor-panel > p {
  color: #4a6278;
}

.timeline-node {
  position: relative;
  padding-left: 2rem;
}

.timeline-node::before {
  content: '';
  position: absolute;
  left: 0.375rem;
  top: 0.5rem;
  width: 0.625rem;
  height: 0.625rem;
  border-radius: 50%;
  background: #5cb800;
  box-shadow: 0 0 0 3px rgba(92, 184, 0, 0.25);
}

.timeline-node:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 0.6875rem;
  top: 1.25rem;
  bottom: -1.5rem;
  width: 1px;
  background: rgba(26, 48, 72, 0.15);
}

/* ==========================================================================
   Diagnostic callout (preserved)
   ========================================================================== */

.diagnostic-callout {
  margin-top: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg-panel);
  border-left: 2px solid var(--cyan-bright);
  border: 1px solid var(--border-tech);
  border-left: 2px solid var(--cyan-bright);
}

.page-content-shell .diagnostic-callout,
.content-panel-light .diagnostic-callout,
.content-panel-muted .diagnostic-callout {
  background: var(--bg-panel);
}

.diagnostic-callout dt {
  font-family: var(--font-display);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--cyan-bright);
  margin-bottom: 0.25rem;
  margin-top: 0.75rem;
}

.diagnostic-callout dt:first-child {
  margin-top: 0;
}

.diagnostic-callout dd {
  color: var(--text-muted);
  margin-left: 0;
  line-height: 1.6;
}

/* ==========================================================================
   FAQ accordion panels
   ========================================================================== */

.faq-panel-item {
  background: var(--bg-panel);
  border: 1px solid var(--border-tech);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.faq-panel-item.is-open {
  border-color: rgba(64, 199, 255, 0.35);
  box-shadow: 0 8px 28px rgba(22, 156, 255, 0.12);
}

.faq-panel-trigger {
  width: 100%;
  text-align: left;
  padding: 1rem 1.25rem;
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--text-main);
  background: transparent;
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.faq-panel-trigger:hover {
  background: rgba(64, 199, 255, 0.06);
}

.faq-panel-trigger svg {
  color: var(--blue-primary);
  flex-shrink: 0;
  transition: transform var(--transition-med);
}

.faq-panel-item.is-open .faq-panel-trigger svg {
  transform: rotate(180deg);
}

.faq-panel-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-med);
  padding-left: 1.25rem;
  padding-right: 1.25rem;
  color: var(--text-muted);
}

.faq-panel-item.is-open .faq-panel-body {
  padding-bottom: 1rem;
}

/* Legacy accordion-panel alias for JS transition */
.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-med);
}

.faq-panel-item .accordion-panel {
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.faq-panel-item.is-open .accordion-panel {
  padding-bottom: 1rem;
}

/* ==========================================================================
   Partner logos & news cards
   ========================================================================== */

.partner-logo-muted {
  filter: brightness(0) invert(1);
  opacity: 0.42;
  transition: opacity var(--transition-med), filter var(--transition-med), transform var(--transition-med);
}

.partner-logo-muted:hover,
.partner-logo-slot:hover .partner-logo-muted {
  opacity: 0.95;
  filter: brightness(0) invert(1) drop-shadow(0 0 16px rgba(64, 199, 255, 0.55));
}

.partner-logo-nasa {
  filter: brightness(0) invert(1);
  opacity: 0.72;
  transition: opacity var(--transition-med), filter var(--transition-med), transform var(--transition-med);
}

.partner-logo-slot:hover .partner-logo-nasa {
  opacity: 1;
  filter: brightness(0) invert(1) drop-shadow(0 0 20px rgba(64, 199, 255, 0.45));
}

.partner-logo-wall {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 2rem 3rem;
  padding: 2.75rem 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-tech);
  background: linear-gradient(135deg, rgba(10, 23, 36, 0.65) 0%, rgba(7, 17, 28, 0.35) 100%);
  overflow: hidden;
}

.partner-logo-wall::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(64, 199, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(64, 199, 255, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse 85% 75% at 50% 50%, black 20%, transparent 80%);
  pointer-events: none;
}

.partner-logo-wall-fx {
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(circle at 20% 40%, rgba(22, 156, 255, 0.12), transparent 45%),
    radial-gradient(circle at 80% 60%, rgba(64, 199, 255, 0.08), transparent 40%);
  pointer-events: none;
  animation: partner-glow-pulse 7s ease-in-out infinite alternate;
}

@keyframes partner-glow-pulse {
  0% { opacity: 0.6; transform: scale(1); }
  100% { opacity: 1; transform: scale(1.04); }
}

.partner-logo-wall-scan {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(64, 199, 255, 0.5), transparent);
  animation: partner-scan-line 5s linear infinite;
  pointer-events: none;
  opacity: 0.5;
}

@keyframes partner-scan-line {
  0% { top: 0; opacity: 0; }
  10% { opacity: 0.6; }
  90% { opacity: 0.6; }
  100% { top: 100%; opacity: 0; }
}

.partner-logo-slot {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 5.5rem;
  min-height: 3rem;
  padding: 0.5rem 1rem;
  transition: transform var(--transition-med);
}

.partner-logo-slot::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 60%;
  height: 2px;
  transform: translateX(-50%) scaleX(0);
  background: linear-gradient(90deg, transparent, var(--cyan-bright), transparent);
  transition: transform var(--transition-med);
}

.partner-logo-slot:hover {
  transform: translateY(-5px);
}

.partner-logo-slot:hover::after {
  transform: translateX(-50%) scaleX(1);
}

.partner-logo-slot:nth-child(3) { animation: partner-logo-in 0.6s ease-out 0.05s both; }
.partner-logo-slot:nth-child(4) { animation: partner-logo-in 0.6s ease-out 0.12s both; }
.partner-logo-slot:nth-child(5) { animation: partner-logo-in 0.6s ease-out 0.19s both; }
.partner-logo-slot:nth-child(6) { animation: partner-logo-in 0.6s ease-out 0.26s both; }
.partner-logo-slot:nth-child(7) { animation: partner-logo-in 0.6s ease-out 0.33s both; }

@keyframes partner-logo-in {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.partner-nasa-feature {
  position: relative;
}

.partner-logo-slot--nasa {
  padding: 0.5rem;
}

.news-card-link {
  display: block;
  background: var(--bg-panel);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-tech);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}

.news-card-link:hover {
  box-shadow: 0 12px 36px rgba(22, 156, 255, 0.18);
  border-color: rgba(64, 199, 255, 0.35);
  transform: translateY(-3px);
}

.news-card-link img {
  transition: opacity var(--transition-fast);
}

.news-card-link:hover img {
  opacity: 0.92;
}

/* ==========================================================================
   CTA band, images, code blocks
   ========================================================================== */

.cta-band {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-tech);
}

.content-image {
  border: 1px solid var(--border-tech);
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35), 0 0 24px rgba(22, 156, 255, 0.08);
}

.code-snippet {
  background: #eef4f9;
  border: 1px solid rgba(26, 48, 72, 0.12);
  border-radius: var(--radius-sm);
  padding: 1.5rem;
  font-family: ui-monospace, 'Cascadia Code', monospace;
  font-size: 0.75rem;
  color: #334d63;
  overflow-x: auto;
}

.code-snippet .label-inline {
  color: var(--blue-primary);
  font-family: var(--font-display);
  margin-bottom: 0.75rem;
  display: block;
}

/* ==========================================================================
   Marquee (reviews strip)
   ========================================================================== */

.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee-scroll 45s linear infinite;
}

@keyframes marquee-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.marquee-inner {
  display: flex;
  gap: 1.5rem;
  padding-right: 1.5rem;
}

/* ==========================================================================
   Float download button (FAB)
   ========================================================================== */

.float-download-btn {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 40;
  box-shadow: 0 8px 32px rgba(22, 156, 255, 0.35);
}

/* ==========================================================================
   Lightbox
   ========================================================================== */

#media-viewer.hidden,
#lightbox.hidden {
  display: none;
}

#media-viewer:not(.hidden),
#lightbox:not(.hidden) {
  display: flex;
  align-items: center;
  justify-content: center;
}

#media-viewer,
#lightbox {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(3, 7, 13, 0.92);
  padding: 1rem;
}

.media-viewer-close,
.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 10;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.5rem;
  font-weight: 300;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.media-viewer-close:hover,
.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.1);
}

.media-viewer-img,
.lightbox-img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
}

.media-viewer-caption,
.lightbox-caption {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  right: 1rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
}

[data-lightbox] {
  cursor: pointer;
}

/* ==========================================================================
   Footer scan line reuse
   ========================================================================== */

footer .scan-line-decor,
footer .section-divider {
  margin-bottom: 1.5rem;
}

/* ==========================================================================
   Language-specific adjustments
   ========================================================================== */

/* Chinese letter-spacing for nav */
body.lang-cn .top-nav-wrapper nav a,
body.lang-cn .guide-toc a {
  letter-spacing: 0.06em;
}

/* Russian button padding */
body.lang-ru .action-btn-primary,
body.lang-ru .action-btn-release {
  padding-left: 1.35rem !important;
  padding-right: 1.35rem !important;
}

/* ==========================================================================
   RTL support
   ========================================================================== */

html[dir="rtl"] body {
  text-align: right;
}

html[dir="rtl"] .top-nav-wrapper nav,
html[dir="rtl"] .crumb-trail-light ol,
html[dir="rtl"] .guide-toc ul,
html[dir="rtl"] .locale-footer-links,
html[dir="rtl"] .lang-footer-links {
  direction: rtl;
}

html[dir="rtl"] .step-track > li {
  padding-left: 0;
  padding-right: 3rem;
}

html[dir="rtl"] .step-track > li::before {
  left: auto;
  right: 0;
}

html[dir="rtl"] .accent-border,
html[dir="rtl"] .diagnostic-callout {
  border-left: none;
  border-right: 2px solid var(--blue-primary);
  padding-left: 0;
  padding-right: 1.25rem;
}

html[dir="rtl"] .locale-dropdown-menu {
  right: auto;
  left: 0;
}

html[dir="rtl"] .float-download-btn {
  right: auto;
  left: 1.5rem;
}

html[dir="rtl"] .flex.gap-3,
html[dir="rtl"] .flex.gap-4 {
  flex-direction: row-reverse;
}

html[dir="rtl"] .faq-panel-trigger {
  text-align: right;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1023px) {
  .top-nav-wrapper nav {
    display: none;
  }
}

@media (max-width: 639px) {
  .diag-banner-copy h1 {
    font-size: 1.75rem;
  }

  .float-download-btn {
    bottom: 1rem;
    right: 1rem;
    font-size: 0.8125rem;
    padding: 0.625rem 1rem;
  }

  html[dir="rtl"] .float-download-btn {
    left: 1rem;
  }

  .diag-banner-device-img {
    min-width: 200px;
  }

  .metric-strip {
    flex-direction: column;
    gap: 0.375rem;
  }
}

@media (min-width: 640px) {
  .float-download-btn {
    bottom: 1.5rem;
    right: 1.5rem;
  }
}

/* ==========================================================================
   Section telemetry dividers & screenshot frames
   ========================================================================== */

main > section:not(:last-child)::after {
  content: '';
  display: block;
  height: 1px;
  max-width: min(92%, 72rem);
  margin: 0 auto;
  background: linear-gradient(
    90deg,
    transparent,
    var(--border-tech) 12%,
    rgba(64, 199, 255, 0.45) 50%,
    var(--border-tech) 88%,
    transparent
  );
  opacity: 0.75;
}

.diag-banner-shell::after {
  display: none;
}

.content-panel-light img[data-lightbox],
.content-panel-muted img[data-lightbox],
.page-content-shell img[data-lightbox] {
  border: 1px solid var(--border-tech);
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.35),
    0 0 24px rgba(22, 156, 255, 0.08),
    inset 0 0 0 1px rgba(64, 199, 255, 0.06);
}

.content-panel-light img[data-lightbox]::before,
.content-panel-muted img[data-lightbox]::before {
  content: none;
}

/* ==========================================================================
   Reduced motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  body::after {
    animation: none;
  }

  .scan-line-decor::after,
  .section-divider::after {
    animation: none;
    opacity: 0.3;
  }

  .diag-banner-video {
    display: none;
  }

  .fx-glow-1,
  .fx-glow-2,
  .fx-glow-3,
  .fx-scan,
  .diag-banner-device-img {
    animation: none !important;
  }

  .diag-banner-home .diag-banner-copy h1,
  .diag-banner-home .diag-banner-copy p,
  .diag-banner-home .diag-banner-cta {
    animation: none !important;
  }

  .press-marquee-track,
  .marquee-track {
    animation: none !important;
  }

  .sensor-panel:hover {
    transform: none;
  }

  .partner-logo-wall-fx,
  .partner-logo-wall-scan,
  .partner-logo-slot {
    animation: none !important;
  }

  .partner-logo-slot:hover {
    transform: none;
  }
}