/* ═══════════════════════════════════════════════════════════════
   ATLAS — Design System & Landing Page Styles
   Premium light-mode interface with clean whites & subtle accents
   ═══════════════════════════════════════════════════════════════ */

/* ─── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Syncopate:wght@400;700&family=Orbitron:wght@600;700;800;900&family=Michroma&family=Space+Grotesk:wght@600;700&display=swap');

/* ─── Design Tokens ────────────────────────────────────────── */
:root {
  /* Palette — Light */
  --color-bg: #FFFFFF;
  --color-bg-surface: #F8F9FB;
  --color-bg-card: #FFFFFF;
  --color-bg-elevated: #F1F3F7;
  --color-border: rgba(0, 0, 0, 0.07);
  --color-border-hover: rgba(0, 0, 0, 0.13);

  --color-text-primary: #0F1729;
  --color-text-secondary: #4B5563;
  --color-text-muted: #9CA3AF;

  --color-accent: #2563EB;
  --color-accent-alt: #7C3AED;
  --color-accent-warm: #EC4899;
  --color-glow-blue: rgba(37, 99, 235, 0.08);
  --color-glow-purple: rgba(124, 58, 237, 0.08);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-logo: 'Syncopate', 'Space Grotesk', -apple-system, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;
  --font-size-hero: clamp(3rem, 6vw, 5.5rem);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Radii */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-glacial: 800ms;

  /* Z-index scale */
  --z-base: 0;
  --z-callout: 10;
  --z-nav: 100;
  --z-overlay: 200;
}

/* ─── Reset & Base ──────────────────────────────────────────── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 16px;
  overflow-x: clip;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: clip;
  min-height: 100vh;
}

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

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

/* ─── Utility ────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

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

/* ─── Navbar ─────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: var(--space-lg) 0;
  transition: background var(--duration-normal) var(--ease-out-quart),
    box-shadow var(--duration-normal) var(--ease-out-quart),
    padding var(--duration-normal) var(--ease-out-quart);
}

.navbar.is-scrolled {
  padding: var(--space-md) 0;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 var(--color-border);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar__brand {
  font-family: var(--font-logo);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-text-primary);
  display: inline-flex;
  align-items: center;
  position: relative;
  transition: opacity var(--duration-fast);
}

.navbar__brand:hover {
  opacity: 0.9;
}

.navbar__brand::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-alt));
  border-radius: var(--radius-full);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out-expo);
  pointer-events: none;
}

.navbar__brand:hover::after {
  transform: scaleX(1);
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
  list-style: none;
}

.navbar__link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: color var(--duration-fast) var(--ease-out-quart);
  position: relative;
  display: inline-flex;
  align-items: center;
}

.navbar__link:hover {
  color: var(--color-text-primary);
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-alt));
  border-radius: var(--radius-full);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out-expo);
  pointer-events: none;
}

.navbar__link:hover::after,
.navbar__link.is-active::after {
  transform: scaleX(1);
}

.navbar__cta {
  font-size: var(--font-size-sm);
  font-weight: 600;
  padding: 0.55rem 1.4rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  letter-spacing: 0.03em;
  transition: all var(--duration-normal) var(--ease-out-expo);
  cursor: pointer;
  background: transparent;
}

.navbar__cta:hover {
  background: var(--color-accent);
  color: #FFFFFF;
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.25);
}

/* ─── Hero Section ───────────────────────────────────────────── */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--color-bg);
  border-bottom: 1px solid rgba(0, 0, 0, 0.03);
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 180px;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.7) 40%, var(--color-bg) 100%);
  pointer-events: none;
  z-index: 1;
}

.hero__ripple {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.75;
}

.section__ripple {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.75;
}

.hero__bg-glow {
  position: absolute;
  width: 1000px;
  height: 1000px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(255, 255, 255, 1) 0%, transparent 100%);
  opacity: 0.25;
  pointer-events: none;
  z-index: 0;
}

.hero__bg-glow--cyan {
  top: -300px;
  right: -200px;
  background: radial-gradient(closest-side, var(--color-accent) 0%, transparent 100%);
  opacity: 0.15;
}

.hero__bg-glow--purple {
  bottom: -300px;
  left: -200px;
  background: radial-gradient(closest-side, var(--color-accent-alt) 0%, transparent 100%);
  opacity: 0.15;
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  padding: 0 var(--space-xl);
}

.hero__title {
  font-size: clamp(2.3rem, 4.4vw, 3.6rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--color-text-primary);
  margin-bottom: 16px;
  opacity: 0;
  transform: translateY(24px);
}

.hero__title-gradient {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-alt) 50%, var(--color-accent-warm) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  max-width: 480px;
  margin: 0 auto 26px;
  line-height: 1.6;
  opacity: 0;
  transform: translateY(20px);
}

/* ─── Hero Action Buttons ───────────────────────────────────── */
.hero__actions {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  opacity: 0;
  transform: translateY(18px);
}

.hero__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all var(--duration-normal) var(--ease-out-quart);
}

.hero__btn--primary {
  background: var(--color-text-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.1);
}

.hero__btn--primary:hover {
  background: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.25);
  color: #FFFFFF;
}

.hero__btn-icon {
  width: 14px;
  height: 14px;
  display: inline-block;
}

.hero__btn--secondary {
  background: #FFFFFF;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
}

.hero__btn--secondary:hover {
  border-color: rgba(0, 0, 0, 0.16);
  background: var(--color-bg-surface);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.06);
}

/* ─── Anchored Scroll Hint ─────────────────────────────────── */
.hero__scroll-hint {
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--color-text-muted);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  z-index: 2;
  cursor: pointer;
  opacity: 0;
  transition: color var(--duration-fast);
}

.hero__scroll-hint:hover {
  color: var(--color-accent);
}

.hero__scroll-line {
  width: 1px;
  height: 36px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {

  0%,
  100% {
    opacity: 0.3;
    transform: scaleY(0.6);
  }

  50% {
    opacity: 1;
    transform: scaleY(1);
  }
}

/* ─── Video Explosion Section (Native CSS Sticky Pinning) ──── */
.explosion {
  position: relative;
  height: 700vh;
  background: var(--color-bg);
}

.explosion::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 160px;
  background: linear-gradient(180deg, rgba(248, 249, 251, 0.3) 0%, transparent 100%);
  pointer-events: none;
  z-index: 1;
}

.explosion::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to bottom, transparent 0%, rgba(248, 249, 251, 0.5) 100%);
  pointer-events: none;
  z-index: 1;
}

.explosion__sticky {
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--color-bg);
  padding-top: 64px;
  box-sizing: border-box;
}

/* ─── Centered Stage: Progress on Left, Video in Center, Notes on Right ── */
.explosion__stage {
  position: relative;
  width: 100%;
  max-width: 1380px;
  height: min(74vh, 620px);
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 28px;
  box-sizing: border-box;
  z-index: 10;
}

/* 1. Left Progress Indicator (Vertically centered alongside stage) */
.explosion__progress {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  align-self: center;
  gap: 0;
  flex-shrink: 0;
  width: 32px;
  z-index: 10;
}

.explosion__progress-track {
  width: 2px;
  height: 200px;
  background: rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-full);
  position: relative;
  overflow: hidden;
}

.explosion__progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0%;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-accent-alt));
  border-radius: var(--radius-full);
  transition: height 60ms linear;
}

.explosion__progress-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-text-muted);
  letter-spacing: 0.12em;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  margin-top: var(--space-md);
}

/* 2. Center Bordered Video Canvas Frame */
.explosion__video-wrap {
  position: relative;
  flex: 1 1 auto;
  max-width: 840px;
  height: 100%;
  overflow: hidden;
  border-radius: 22px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow:
    0 12px 48px rgba(0, 0, 0, 0.06),
    0 2px 6px rgba(0, 0, 0, 0.03);
  background: #FFFFFF;
}

/* Soft inner vignette inside the bordered canvas */
.explosion__video-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  border-radius: 22px;
  box-shadow: inset 0 0 60px 20px rgba(255, 255, 255, 0.5);
}

/*
 * ScrollyVideo's injected wrapper — fill the bordered canvas.
 */
.explosion__video-wrap>div {
  position: absolute !important;
  inset: 0 !important;
  width: 100% !important;
  height: 100% !important;
}

.explosion__video-wrap canvas {
  position: absolute !important;
  top: 50% !important;
  left: 50% !important;
  transform: translate(-50%, -50%) !important;
  min-width: 100% !important;
  min-height: 100% !important;
  width: auto !important;
  height: 100% !important;
  object-fit: cover !important;
  display: block !important;
}

.explosion__video-wrap video {
  position: absolute !important;
  opacity: 0 !important;
  pointer-events: none !important;
  width: 0 !important;
  height: 0 !important;
}

/* 3. Right-Hand Technical Inspection Panel (Exact same height and container styling as video frame) */
.explosion__notes-panel {
  width: 380px;
  height: 100%;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  background: #FFFFFF;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 22px;
  box-shadow:
    0 12px 48px rgba(0, 0, 0, 0.06),
    0 2px 6px rgba(0, 0, 0, 0.03);
  padding: 16px;
  box-sizing: border-box;
  overflow: hidden;
}

.notes-panel__header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 2px 4px 10px 4px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  flex-shrink: 0;
}

.notes-panel__eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

/* ─── Truncated Out-of-Focus Title Nav Items ────────────────── */
.notes-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px 0 12px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  flex-shrink: 0;
}

.notes-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px 8px 14px;
  background: #F8FAFC;
  border: 1px solid rgba(0, 0, 0, 0.04);
  border-radius: 10px;
  cursor: pointer;
  font-family: inherit;
  text-align: left;
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.2s ease;
  user-select: none;
  position: relative;
  overflow: hidden;
}

.notes-nav-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--color-accent);
  transform: scaleY(0);
  transform-origin: center;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  border-radius: 0 2px 2px 0;
}

.notes-nav-item:hover {
  background: #F1F5F9;
  border-color: rgba(0, 0, 0, 0.08);
}

.notes-nav-item.is-active {
  background: rgba(37, 99, 235, 0.06);
  border-color: rgba(37, 99, 235, 0.3);
}

.notes-nav-item.is-active::before {
  transform: scaleY(1);
}

.notes-nav-item__num {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  transition: color 0.2s ease;
}

.notes-nav-item.is-active .notes-nav-item__num {
  color: var(--color-accent);
}

.notes-nav-item__title {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--color-text-secondary);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.2s ease;
}

.notes-nav-item.is-active .notes-nav-item__title {
  color: var(--color-text-primary);
  font-weight: 700;
}

.notes-nav-item__chevron {
  font-size: 11px;
  color: var(--color-text-muted);
  opacity: 0;
  transform: translateX(-4px);
  transition: all 0.2s ease;
}

.notes-nav-item.is-active .notes-nav-item__chevron {
  opacity: 1;
  transform: translateX(0);
  color: var(--color-accent);
}

/* ─── Dedicated Morphing Shell for Focused Inspection Note ── */
.focused-note-container {
  flex: 1;
  min-height: 0;
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  margin-top: 12px;
  background: linear-gradient(145deg, #FFFFFF 0%, #F8FAFC 100%);
  border: 1px solid rgba(37, 99, 235, 0.18);
  border-radius: 14px;
  box-shadow:
    0 4px 20px rgba(37, 99, 235, 0.06),
    0 1px 3px rgba(0, 0, 0, 0.03);
  overflow: hidden;
  will-change: border-color, box-shadow;
}

/* Subtle top laser scanline / telemetry indicator */
.focused-note-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, #2563EB, #38BDF8, #8B5CF6);
  opacity: 0.8;
  z-index: 2;
  pointer-events: none;
}

.focused-note {
  grid-area: 1 / 1;
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  will-change: transform, opacity;
}

.focused-note.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.focused-note__header {
  margin-bottom: 6px;
  flex-shrink: 0;
}

.focused-note__tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  text-transform: uppercase;
}

.focused-note__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 3px 0 0 0;
}

.focused-note__desc {
  font-size: 12.5px;
  color: #475569;
  line-height: 1.5;
  margin: 0;
  flex: 1;
  display: flex;
  align-items: center;
}

.focused-note__specs {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  flex-shrink: 0;
  margin-top: 8px;
}

.spec-pill {
  font-size: 10.5px;
  font-weight: 600;
  color: #334155;
  background: #F1F5F9;
  border: 1px solid rgba(203, 213, 225, 0.85);
  padding: 2.5px 8px;
  border-radius: 5px;
  letter-spacing: 0.02em;
}

/* Responsive adjustments */
@media (max-width: 1080px) {
  .explosion__stage {
    padding: 0 20px;
    gap: 24px;
  }

  .explosion__notes-panel {
    width: 310px;
  }
}

@media (max-width: 860px) {
  .explosion__stage {
    flex-direction: column;
    height: auto;
    gap: 16px;
  }

  .explosion__video-wrap {
    width: 100%;
    height: 46vh;
  }

  .explosion__notes-panel {
    width: 100%;
    max-width: 480px;
  }
}

/* ─── Features Section ───────────────────────────────────────── */
.features {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 70px 0 40px;
  overflow: hidden;
  background: linear-gradient(180deg, var(--color-bg) 0%, rgba(248, 249, 251, 0.6) 120px, var(--color-bg-surface) 240px);
  border-top: 1px solid rgba(0, 0, 0, 0.04);
  box-sizing: border-box;
}

.features--secondary {
  background: linear-gradient(180deg, var(--color-bg-surface) 0%, rgba(248, 249, 251, 0.7) 120px, var(--color-bg-surface) 240px);
  border-top: 1px solid rgba(0, 0, 0, 0.03);
}

.features::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 200px;
  background: radial-gradient(ellipse at top, rgba(37, 99, 235, 0.03) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.features .container {
  position: relative;
  z-index: 1;
}

.features__header {
  text-align: center;
  margin-bottom: 28px;
}

.features__eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.features__title {
  font-size: clamp(1.8rem, 2.6vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.features__subtitle {
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.5;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.feature-card {
  --glow-angle: 165deg;
  --cyan-pos: 90% 10%;
  --purple-pos: 10% 90%;
  --reflect-x: 50%;
  --reflect-y: 50%;
  --reflect-opacity: 0;
  position: relative;
  background:
    radial-gradient(ellipse 260px 180px at var(--cyan-pos), rgba(37, 99, 235, 0.02) 0%, transparent 70%),
    radial-gradient(ellipse 260px 180px at var(--purple-pos), rgba(124, 58, 237, 0.015) 0%, transparent 70%),
    linear-gradient(var(--glow-angle), #FFFFFF 0%, rgba(255, 255, 255, 0.96) 55%, rgba(248, 250, 254, 0.35) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 28px 24px 26px;
  overflow: hidden;
  opacity: 0;
  transform: translateY(30px);
  transition: border-color var(--duration-normal) var(--ease-out-quart),
    transform var(--duration-normal) var(--ease-out-quart),
    box-shadow var(--duration-normal) var(--ease-out-quart);
}

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

.feature-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-3px);
  box-shadow: 0 10px 32px rgba(37, 99, 235, 0.04), 0 3px 10px rgba(0, 0, 0, 0.02);
}

/* Ambient Diffuse Reflective Surface — reactive directional lighting */
.feature-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  z-index: 1;
  background:
    radial-gradient(ellipse 340px 240px at var(--reflect-x, 50%) var(--reflect-y, 50%), rgba(255, 255, 255, 0.45) 0%, rgba(37, 99, 235, 0.022) 45%, transparent 72%),
    radial-gradient(ellipse 280px 200px at var(--cyan-pos, 90% 10%), rgba(37, 99, 235, 0.025) 0%, transparent 68%),
    radial-gradient(ellipse 280px 200px at var(--purple-pos, 10% 90%), rgba(124, 58, 237, 0.016) 0%, transparent 68%),
    linear-gradient(var(--glow-angle, 165deg), rgba(255, 255, 255, 0.6) 0%, rgba(255, 255, 255, 0.88) 55%, rgba(248, 250, 254, 0.35) 100%);
  opacity: var(--reflect-opacity, 0);
  will-change: opacity;
}

/* Organic Randomized Lighting Orientations for Feature Cards */
.feature-card:nth-child(1) {
  --glow-angle: 140deg;
  --cyan-pos: 88% 12%;
  --purple-pos: 12% 88%;
}

.feature-card:nth-child(2) {
  --glow-angle: 215deg;
  --cyan-pos: 16% 18%;
  --purple-pos: 84% 82%;
}

.feature-card:nth-child(3) {
  --glow-angle: 125deg;
  --cyan-pos: 50% 8%;
  --purple-pos: 20% 92%;
}

.feature-card:nth-child(4) {
  --glow-angle: 175deg;
  --cyan-pos: 12% 78%;
  --purple-pos: 88% 22%;
}

.feature-card:nth-child(5) {
  --glow-angle: 105deg;
  --cyan-pos: 82% 88%;
  --purple-pos: 18% 12%;
}

.feature-card:nth-child(6) {
  --glow-angle: 230deg;
  --cyan-pos: 85% 15%;
  --purple-pos: 40% 90%;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out-quart);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-card__glow {
  position: absolute;
  top: -120px;
  right: -120px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(closest-side, var(--color-glow-blue) 0%, transparent 100%);
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-out-quart);
  pointer-events: none;
}

.feature-card:hover .feature-card__glow {
  opacity: 1;
}

.feature-card__icon {
  position: relative;
  z-index: 2;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  background: rgba(37, 99, 235, 0.05);
  border: 1px solid rgba(37, 99, 235, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--color-accent);
  transition: all 0.3s ease;
}

.feature-card:hover .feature-card__icon {
  background: rgba(37, 99, 235, 0.1);
  border-color: rgba(37, 99, 235, 0.25);
  transform: scale(1.05);
}

.feature-icon-svg {
  width: 22px;
  height: 22px;
  stroke: var(--color-accent);
  display: block;
}

.feature-card__title {
  position: relative;
  z-index: 2;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.feature-card__desc {
  position: relative;
  z-index: 2;
  font-size: 0.86rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}


/* ─── Specs Section ──────────────────────────────────────────── */
.specs {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 70px 0 30px;
  background: linear-gradient(180deg, var(--color-bg-surface) 0%, rgba(248, 249, 251, 0.6) 120px, var(--color-bg) 260px);
  overflow: hidden;
  box-sizing: border-box;
}

/* Feathered Light-Bridge Divider (Seamless replacement for the 1px cut line) */
.specs::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(640px, 80%);
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(0, 0, 0, 0.04) 20%, rgba(37, 99, 235, 0.22) 50%, rgba(0, 0, 0, 0.04) 80%, transparent 100%);
  z-index: 1;
}

/* Atmospheric Soft Ambient Bloom */
.specs::after {
  content: '';
  position: absolute;
  top: -50px;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 140px;
  background: radial-gradient(ellipse at center, rgba(37, 99, 235, 0.035) 0%, rgba(124, 58, 237, 0.015) 45%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.specs .container {
  position: relative;
  z-index: 2;
}

.specs__header {
  text-align: center;
  margin-bottom: 24px;
}

.specs__eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.specs__title {
  font-size: clamp(1.6rem, 2.4vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin-bottom: 6px;
}

.specs__subtitle {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.45;
}

.specs__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 1160px;
  margin: 0 auto;
}

.spec-item {
  --glow-angle: 165deg;
  --cyan-pos: 90% 15%;
  --purple-pos: 10% 85%;
  position: relative;
  background:
    radial-gradient(ellipse 200px 140px at var(--cyan-pos), rgba(37, 99, 235, 0.02) 0%, transparent 70%),
    radial-gradient(ellipse 200px 140px at var(--purple-pos), rgba(124, 58, 237, 0.015) 0%, transparent 70%),
    linear-gradient(var(--glow-angle), #FFFFFF 0%, rgba(255, 255, 255, 0.96) 55%, rgba(248, 250, 254, 0.35) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 24px 20px 22px;
  text-align: center;
  overflow: hidden;
  opacity: 0;
  transform: translateY(24px);
  transition: border-color var(--duration-normal) var(--ease-out-quart),
    background var(--duration-normal) var(--ease-out-quart),
    transform var(--duration-normal) var(--ease-out-quart),
    box-shadow var(--duration-normal) var(--ease-out-quart);
}

.spec-item:hover {
  border-color: var(--color-border-hover);
  background:
    radial-gradient(ellipse 220px 160px at var(--cyan-pos), rgba(37, 99, 235, 0.038) 0%, transparent 70%),
    radial-gradient(ellipse 220px 160px at var(--purple-pos), rgba(124, 58, 237, 0.028) 0%, transparent 70%),
    linear-gradient(var(--glow-angle), #FFFFFF 0%, rgba(255, 255, 255, 0.98) 55%, rgba(248, 250, 254, 0.5) 100%);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(37, 99, 235, 0.04), 0 2px 8px rgba(0, 0, 0, 0.02);
}

/* Organic Randomized Lighting Orientations for Spec Cards */
.spec-item:nth-child(1) {
  --glow-angle: 145deg;
  --cyan-pos: 15% 18%;
  --purple-pos: 85% 82%;
}

.spec-item:nth-child(2) {
  --glow-angle: 195deg;
  --cyan-pos: 85% 15%;
  --purple-pos: 15% 85%;
}

.spec-item:nth-child(3) {
  --glow-angle: 115deg;
  --cyan-pos: 78% 85%;
  --purple-pos: 22% 15%;
}

.spec-item:nth-child(4) {
  --glow-angle: 225deg;
  --cyan-pos: 18% 82%;
  --purple-pos: 82% 18%;
}

.spec-item__value {
  position: relative;
  z-index: 2;
  font-size: clamp(1.8rem, 2.5vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-alt));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
  line-height: 1.1;
}

.spec-item__label {
  position: relative;
  z-index: 2;
  font-size: 11px;
  font-weight: 700;
  color: var(--color-text-primary);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 8px;
}

.spec-item__desc {
  position: relative;
  z-index: 2;
  font-size: 12.5px;
  color: var(--color-text-secondary);
  line-height: 1.55;
  margin: 0;
}


/* ─── CTA Section ────────────────────────────────────────────── */
.cta {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  text-align: center;
  background: var(--color-bg);
  box-sizing: border-box;
}

.cta-content-wrapper {
  flex-grow: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  position: relative;
  z-index: 1;
}

.cta .container {
  position: relative;
  z-index: 1;
}

.cta__inner {
  position: relative;
  background:
    radial-gradient(ellipse 500px 300px at 85% 15%, rgba(37, 99, 235, 0.025) 0%, transparent 70%),
    radial-gradient(ellipse 500px 300px at 15% 85%, rgba(124, 58, 237, 0.02) 0%, transparent 70%),
    linear-gradient(165deg, #FFFFFF 0%, rgba(255, 255, 255, 0.96) 50%, rgba(248, 250, 254, 0.4) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: 36px 32px 34px;
  max-width: 820px;
  margin: 60px auto 0;
  overflow: hidden;
}

.cta__glow {
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 240px;
  background: radial-gradient(ellipse, var(--color-glow-blue), transparent 70%);
  opacity: 0.6;
  pointer-events: none;
  z-index: 0;
}

.cta__eyebrow {
  position: relative;
  z-index: 2;
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.cta__title {
  position: relative;
  z-index: 2;
  font-size: clamp(1.8rem, 2.8vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.cta__desc {
  position: relative;
  z-index: 2;
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  max-width: 500px;
  margin: 0 auto 20px;
  line-height: 1.5;
}

.cta__button {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  padding: 0.8rem 2rem;
  border: none;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-alt));
  color: #FFFFFF;
  cursor: pointer;
  overflow: hidden;
  transition: transform var(--duration-normal) var(--ease-out-expo),
    box-shadow var(--duration-normal) var(--ease-out-expo);
}

.cta__button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 40px rgba(37, 99, 235, 0.3);
}

.cta__button::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(255, 255, 255, 0.2));
  opacity: 0;
  transition: opacity var(--duration-fast);
}

.cta__button:hover::after {
  opacity: 1;
}

.cta__button svg {
  width: 18px;
  height: 18px;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.cta__button:hover svg {
  transform: translateX(3px);
}


/* ─── Footer ──────────────────────────────────────────────────── */
.footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__brand {
  font-family: var(--font-logo);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--color-text-primary);
}

.footer__links {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
}

.footer__link {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  transition: color var(--duration-fast);
}

.footer__link:hover {
  color: var(--color-text-primary);
}

.footer__copy {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* ─── Subtle Top Loading Indicator ────────────────────────────── */
.top-loader {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-alt));
  z-index: 99999;
  transition: width 0.25s ease-out, opacity 0.4s ease;
  pointer-events: none;
}

.top-loader.is-done {
  opacity: 0;
  pointer-events: none;
}

/* ─── Responsive ──────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .specs__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .callout--shell,
  .callout--processor {
    right: 4%;
  }

  .callout--sensor,
  .callout--battery {
    left: 4%;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-hero: clamp(2rem, 8vw, 3rem);
  }

  .navbar__links {
    display: none;
  }

  .features__grid {
    grid-template-columns: 1fr;
  }

  .specs__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .explosion__progress {
    display: none;
  }

  .callout {
    display: none;
  }

  .hero__subtitle {
    font-size: var(--font-size-base);
  }

  .cta__inner {
    padding: var(--space-3xl) var(--space-lg);
  }

  .footer__inner {
    flex-direction: column;
    gap: var(--space-lg);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .specs__grid {
    grid-template-columns: 1fr;
  }
}