/* ================================================================
   SENTINEL THEME — VANTREK X1 TACTICAL SMARTWATCH
   Aesthetic: Precision Hardware, Aerospace Dark Mode
   Palette: Obsidian (#090C11) + Deep Carbon (#11151E) + Electric Cyan (#00F0FF) + Cool Slate (#94A3B8)
   Fonts: Plus Jakarta Sans (Headings/Body), JetBrains Mono (Specs/Data)
   Strict Compliance: 320px-1440px zero horizontal overflow, Golden Funnel R8.3
   ================================================================ */

:root {
  --bg-obsidian:    #090C11;
  --bg-subtle:      #11151E;
  --bg-card:        #161B26;
  --bg-card-hover:  #1D2332;
  --border-cyan:    rgba(0, 240, 255, 0.28);
  --border-cyan-bright: #00F0FF;
  --border-dim:     rgba(255, 255, 255, 0.08);

  --cyan-bright:    #00F0FF;
  --cyan-glow:      rgba(0, 240, 255, 0.35);
  --cyan-tint:      rgba(0, 240, 255, 0.08);
  --green-online:   #10B981;
  --amber-alert:    #F59E0B;
  --amber-glow:     rgba(245, 158, 11, 0.3);

  --text-primary:   #F8FAFC;
  --text-secondary: #94A3B8;
  --text-mono:      #64748B;
  --text-muted:     #475569;

  --font-sans:      'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono:      'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --container:      1180px;
  --container-narrow: 860px;
  --radius-sm:      4px;
  --radius-md:      10px;
  --radius-lg:      18px;
  --radius-pill:    9999px;
  --transition:     all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ── RESET & ZERO OVERFLOW ENFORCEMENT ──────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
  overflow-x: hidden;
  max-width: 100%;
  width: 100%;
}

body.theme-sentinel {
  font-family: var(--font-sans);
  background-color: var(--bg-obsidian);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  max-width: 100%;
  width: 100%;
  position: relative;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.2;
}

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

.mono-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--cyan-bright);
  background: var(--cyan-tint);
  border: 1px solid var(--border-cyan);
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  display: inline-block;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.amber-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: #FFF;
  background: var(--amber-alert);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  display: inline-block;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ── ANNOUNCEMENT BAR ──────────────────────────────────────── */
.announcement-bar {
  background: #0B1019;
  border-bottom: 1px solid rgba(0, 240, 255, 0.2);
  padding: 10px 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-secondary);
  text-align: center;
}

.announcement-inner {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green-online);
  box-shadow: 0 0 10px var(--green-online);
  display: inline-block;
  animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

.announcement-timer {
  color: var(--cyan-bright);
  font-weight: 700;
}

/* ── NAVIGATION ────────────────────────────────────────────── */
.sentinel-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 12, 17, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-dim);
  padding: 14px 0;
}

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

.brand-id {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-id img {
  height: 32px;
  width: auto;
}

.nav-links {
  display: flex;
  gap: 28px;
  font-size: 12px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  list-style: none;
}

.nav-links a:hover {
  color: var(--cyan-bright);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn-sentinel-nav {
  background: transparent;
  border: 1px solid var(--cyan-bright);
  color: var(--cyan-bright);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.15);
  letter-spacing: 0.04em;
  cursor: pointer;
  white-space: nowrap;
}

.btn-sentinel-nav:hover {
  background: var(--cyan-bright);
  color: var(--bg-obsidian);
  box-shadow: 0 0 25px var(--cyan-glow);
}

.hamburger-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-dim);
  color: #FFF;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
}

/* Mobile Drawer */
.mobile-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.mobile-drawer-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  transform: translateX(100%);
  visibility: hidden;
  width: 300px;
  max-width: 85vw;
  height: 100%;
  background: var(--bg-card);
  border-left: 1px solid var(--border-cyan);
  z-index: 1001;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.3s;
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.7);
}

.mobile-drawer.active {
  transform: translateX(0);
  visibility: visible;
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-dim);
  padding-bottom: 16px;
}

.drawer-close {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 26px;
  cursor: pointer;
  line-height: 1;
}

.drawer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin: 28px 0;
  font-family: var(--font-mono);
  font-size: 13px;
  text-transform: uppercase;
}

.drawer-links a {
  color: var(--text-primary);
  display: block;
}

.drawer-links a:hover {
  color: var(--cyan-bright);
}

.drawer-cta-wrap {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ── HERO SECTION ──────────────────────────────────────────── */
.sentinel-hero {
  padding: 56px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-top-meta {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.live-pulse {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--green-online);
  font-weight: 600;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 6px;
}

.sentinel-h1 {
  font-size: clamp(2.3rem, 5vw, 3.8rem);
  margin-bottom: 18px;
  letter-spacing: -0.02em;
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
}

.cyan-gradient {
  background: linear-gradient(135deg, #FFFFFF 20%, var(--cyan-bright) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sentinel-sub {
  font-size: 1.12rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 36px;
  line-height: 1.65;
}

/* Hotspot Stage */
.hotspot-stage {
  background: var(--bg-subtle);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
  position: relative;
  padding: 40px 20px 24px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
  max-width: 860px;
  margin: 0 auto;
}

.radar-grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgba(0, 240, 255, 0.03) 1px, transparent 1px),
                    linear-gradient(to bottom, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
  background-size: 36px 36px;
  pointer-events: none;
  border-radius: var(--radius-lg);
}

.hotspot-image-pod {
  position: relative;
  max-width: 440px;
  margin: 0 auto 32px;
}

.hardware-img {
  margin: 0 auto;
  filter: drop-shadow(0 20px 40px rgba(0,0,0,0.85));
  max-height: 380px;
  object-fit: contain;
}

/* Hotspot Dots */
.hotspot-point {
  position: absolute;
  z-index: 20;
  cursor: pointer;
}

.point-1 { top: 22%; left: 16%; }
.point-2 { top: 12%; right: 18%; }
.point-3 { bottom: 22%; left: 20%; }
.point-4 { bottom: 18%; right: 18%; }

.ping {
  position: absolute;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid var(--cyan-bright);
  top: -6px;
  left: -6px;
  animation: radar-ping 2s infinite ease-out;
  pointer-events: none;
}

.core-dot {
  display: block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--cyan-bright);
  box-shadow: 0 0 12px var(--cyan-bright);
}

@keyframes radar-ping {
  0% { transform: scale(0.6); opacity: 1; }
  100% { transform: scale(2.2); opacity: 0; }
}

.spot-card {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(22, 27, 38, 0.96);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  width: 220px;
  text-align: left;
  pointer-events: none;
  opacity: 0;
  transition: var(--transition);
  box-shadow: 0 10px 30px rgba(0,0,0,0.6);
  z-index: 30;
}

.spot-title {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan-bright);
  font-weight: 700;
  display: block;
  margin-bottom: 3px;
}

.spot-card p {
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1.4;
  margin: 0;
}

.hotspot-point:hover .spot-card,
.hotspot-point.active .spot-card {
  opacity: 1;
  transform: translateX(-50%) translateY(-6px);
}

/* HUD Readout Strip */
.hud-readout-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  background: rgba(9, 12, 17, 0.85);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  position: relative;
  z-index: 10;
}

.hud-item {
  text-align: left;
}

.hud-lbl {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-mono);
  display: block;
  margin-bottom: 4px;
  text-transform: uppercase;
}

.hud-val {
  font-family: var(--font-mono);
  font-size: 14.5px;
  font-weight: 700;
  color: #FFF;
}

.hud-cyan {
  color: var(--cyan-bright);
}

.hero-deploy-row {
  margin-top: 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.btn-sentinel-hero {
  background: var(--cyan-bright);
  color: var(--bg-obsidian);
  font-family: var(--font-mono);
  font-size: 14.5px;
  font-weight: 800;
  padding: 16px 36px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 0 35px var(--cyan-glow);
  letter-spacing: 0.04em;
  cursor: pointer;
  text-transform: uppercase;
  transition: var(--transition);
}

.btn-sentinel-hero:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 50px var(--cyan-glow);
  background: #38F8FF;
}

.mobile-hero-cta {
  display: none;
}

.deploy-note {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-mono);
}

/* ── STICKY STORYTELLING BREAKDOWN ─────────────────────────── */
.sticky-story-section {
  padding: 90px 0;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border-dim);
}

.sticky-grid {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 50px;
  align-items: start;
}

.sticky-visual-col {
  position: relative;
}

.sticky-frame {
  position: sticky;
  top: 100px;
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  overflow: hidden;
}

.frame-scanner {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan-bright), transparent);
  box-shadow: 0 0 15px var(--cyan-bright);
  animation: scan-vertical 4s infinite linear;
}

@keyframes scan-vertical {
  0% { top: 0; }
  50% { top: 100%; }
  100% { top: 0; }
}

.sticky-img {
  margin: 0 auto;
  filter: drop-shadow(0 15px 30px rgba(0,0,0,0.7));
  max-height: 380px;
  object-fit: contain;
}

.frame-hud-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--cyan-bright);
  margin-top: 18px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.scrolling-content-col {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.story-chapter {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: var(--transition);
}

.story-chapter:hover {
  border-color: rgba(0, 240, 255, 0.35);
}

.chapter-code {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan-bright);
  font-weight: 700;
  display: block;
  margin-bottom: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.story-chapter h3 {
  font-size: 1.65rem;
  margin-bottom: 14px;
}

.story-chapter p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.spec-callout-card {
  background: rgba(0, 240, 255, 0.05);
  border-left: 3px solid var(--cyan-bright);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 12px;
}

.spec-k {
  color: var(--text-mono);
  margin-right: 8px;
}

.spec-v {
  color: #FFF;
  font-weight: 600;
}

/* ── MULTI-ZONE / 7-IN-1 TACTICAL SUITE ─────────────────────── */
.sentinel-multizone-section {
  padding: 90px 0;
  border-top: 1px solid var(--border-dim);
}

.section-head-center {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-head-center h2 {
  font-size: clamp(2rem, 3.8vw, 2.8rem);
  margin-top: 12px;
  margin-bottom: 12px;
}

.section-head-center p {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.multizone-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.mz-item {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.mz-item:hover {
  transform: translateY(-3px);
  border-color: var(--border-cyan);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.mz-icon {
  font-size: 26px;
  margin-bottom: 14px;
  display: block;
}

.mz-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--cyan-bright);
  margin-bottom: 8px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: block;
}

.mz-item h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

.mz-item p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 18px;
  line-height: 1.6;
}

.mz-specs {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 11.5px;
  font-family: var(--font-mono);
  color: #FFF;
  border-top: 1px solid var(--border-dim);
  padding-top: 14px;
}

.mz-specs li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mz-specs li::before {
  content: '▸';
  color: var(--cyan-bright);
}

/* ── WAVEFORMS / RELIABILITY SECTION ───────────────────────── */
.sentinel-waveforms-section {
  padding: 90px 0;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border-dim);
}

.waveform-stages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.w-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
}

.w-card:hover {
  border-color: var(--border-cyan);
}

.w-freq {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan-bright);
  background: var(--cyan-tint);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: 12px;
  font-weight: 700;
}

.w-card h4 {
  font-size: 1.15rem;
  margin-bottom: 8px;
  color: #FFF;
}

.w-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ── SCHEMATIC SECTION ─────────────────────────────────────── */
.schematic-section {
  padding: 90px 0;
  border-top: 1px solid var(--border-dim);
}

.schematic-display-card {
  background: var(--bg-subtle);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
  padding: 44px 32px;
  text-align: center;
}

.schematic-img {
  margin: 0 auto 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-cyan);
  max-height: 380px;
  object-fit: cover;
  box-shadow: 0 15px 40px rgba(0,0,0,0.6);
}

.schematic-grid-notes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  text-align: left;
}

.note-box {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 22px;
}

.note-num {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--cyan-bright);
  display: block;
  margin-bottom: 6px;
}

.note-box h4 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.note-box p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ── UNBOXING MANIFEST ─────────────────────────────────────── */
.sentinel-unboxing-section {
  padding: 90px 0;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border-dim);
}

.unboxing-card-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.unboxing-visual img {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-cyan);
  margin: 0 auto;
  box-shadow: 0 18px 45px rgba(0,0,0,0.6);
}

.manifest-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.manifest-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  gap: 10px;
}

.m-qty {
  color: var(--cyan-bright);
  font-weight: 700;
  min-width: 32px;
}

.m-item {
  color: #FFF;
  flex: 1;
}

.m-stat {
  font-size: 10px;
  color: var(--green-online);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 3px 8px;
  border-radius: 2px;
  white-space: nowrap;
}

/* ── 3-STEP FIELD DEPLOYMENT ───────────────────────────────── */
.sentinel-steps-section {
  padding: 90px 0;
  border-top: 1px solid var(--border-dim);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.step-card:hover {
  border-color: var(--border-cyan);
}

.step-img-box {
  margin-bottom: 20px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-dim);
}

.step-img-box img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.step-pill {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan-bright);
  font-weight: 700;
  margin-bottom: 8px;
  display: block;
}

.step-card h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.step-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── TELEMETRY REVIEWS (6 GRID) ────────────────────────────── */
.sentinel-reviews {
  padding: 90px 0;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border-dim);
}

.telemetry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.telemetry-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.telemetry-card:hover {
  border-color: rgba(0, 240, 255, 0.3);
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.user-id {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-mono);
}

.status-verified {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--green-online);
}

.review-stars {
  color: #FFB800;
  font-size: 14px;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.telemetry-card h4 {
  font-size: 1.15rem;
  margin-bottom: 10px;
  color: #FFF;
}

.telemetry-card p {
  font-size: 0.93rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.65;
}

.telemetry-stamp {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan-bright);
}

/* ── MASTER SPEC SHEET ─────────────────────────────────────── */
.sentinel-specs {
  padding: 90px 0;
  border-top: 1px solid var(--border-dim);
}

.spec-matrix-table {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.matrix-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-dim);
  font-family: var(--font-mono);
  font-size: 12.5px;
  gap: 16px;
}

.matrix-row:last-child {
  border-bottom: none;
}

.matrix-row .k {
  color: var(--text-mono);
  flex: 1;
}

.matrix-row .v {
  color: #FFF;
  font-weight: 600;
  text-align: right;
  flex: 1;
}

/* ── GOLDEN FUNNEL PACKAGES SECTION (#packages) ────────────── */
.sentinel-packages-section {
  padding: 96px 0 110px;
  background: linear-gradient(180deg, var(--bg-subtle) 0%, var(--bg-obsidian) 100%);
  border-top: 1px solid var(--border-cyan);
  position: relative;
}

.packages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.package-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
  box-shadow: 0 15px 35px rgba(0,0,0,0.4);
}

.package-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-cyan);
}

.package-card.highlight {
  border: 2px solid var(--cyan-bright);
  background: linear-gradient(180deg, rgba(0, 240, 255, 0.08) 0%, var(--bg-card) 40%);
  box-shadow: 0 20px 45px rgba(0, 240, 255, 0.15);
}

.package-badge-wrap {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  z-index: 10;
}

.pkg-header {
  text-align: center;
  margin-bottom: 20px;
  padding-top: 8px;
}

.pkg-tier-name {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.pkg-title {
  font-size: 1.4rem;
  color: #FFF;
  margin-bottom: 4px;
}

.pkg-units {
  font-size: 12px;
  color: var(--cyan-bright);
  font-family: var(--font-mono);
}

.pkg-pricing {
  text-align: center;
  background: rgba(9, 12, 17, 0.7);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-sm);
  padding: 16px 12px;
  margin-bottom: 20px;
}

.pkg-strike {
  font-size: 13px;
  color: var(--text-mono);
  text-decoration: line-through;
  font-family: var(--font-mono);
  margin-bottom: 2px;
}

.pkg-price {
  font-size: 2.2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #FFF;
  line-height: 1;
  margin-bottom: 6px;
}

.package-card.highlight .pkg-price {
  color: var(--cyan-bright);
}

.pkg-per-unit {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
}

.pkg-saving {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--green-online);
  font-weight: 700;
  margin-top: 4px;
}

.pkg-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  flex: 1;
}

.pkg-features li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.4;
}

.pkg-features li::before {
  content: '✓';
  color: var(--cyan-bright);
  font-weight: 700;
}

.btn-package-cta {
  background: var(--cyan-bright);
  color: var(--bg-obsidian);
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 800;
  padding: 14px 12px;
  border-radius: var(--radius-sm);
  text-align: center;
  display: block;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  transition: var(--transition);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
}

.btn-package-cta:hover {
  background: #38F8FF;
  box-shadow: 0 0 30px var(--cyan-glow);
  transform: translateY(-2px);
}

.package-card.highlight .btn-package-cta {
  background: var(--cyan-bright);
  box-shadow: 0 0 30px var(--cyan-glow);
}

/* ── FAQ ACCORDION ─────────────────────────────────────────── */
.sentinel-faq {
  padding: 90px 0;
  border-top: 1px solid var(--border-dim);
}

.sentinel-faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 860px;
  margin: 0 auto;
}

.s-faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.s-faq-item:hover {
  border-color: rgba(0, 240, 255, 0.3);
}

.s-faq-q {
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: #FFF;
  font-weight: 600;
  gap: 16px;
}

.s-toggle {
  color: var(--cyan-bright);
  font-size: 20px;
  line-height: 1;
  transition: transform 0.25s ease;
  user-select: none;
}

.s-faq-a {
  padding: 0 24px 22px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  display: none;
}

.s-faq-item.active .s-faq-a {
  display: block;
}

.s-faq-item.active .s-toggle {
  transform: rotate(45deg);
}

/* ── STICKY BOTTOM BAR ─────────────────────────────────────── */
.sticky-bottom-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(9, 12, 17, 0.95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--border-cyan);
  padding: 12px 20px;
  z-index: 90;
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.6);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sticky-bar-info {
  display: flex;
  align-items: center;
  gap: 16px;
}

.sticky-bar-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: #FFF;
}

.sticky-bar-timer {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan-bright);
}

.sticky-btn-cta {
  background: var(--cyan-bright);
  color: var(--bg-obsidian);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  box-shadow: 0 0 20px var(--cyan-glow);
  white-space: nowrap;
}

.sticky-btn-cta:hover {
  background: #38F8FF;
}

/* ── FOOTER ────────────────────────────────────────────────── */
.sentinel-footer {
  padding: 56px 0 96px;
  border-top: 1px solid var(--border-dim);
  font-size: 12px;
  color: var(--text-mono);
  text-align: center;
  background: var(--bg-obsidian);
}

.footer-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
  max-width: 780px;
  margin: 0 auto;
}

.footer-logo {
  height: 30px;
  width: auto;
}

.footer-nav {
  display: flex;
  gap: 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-nav a {
  color: var(--text-secondary);
}

.footer-nav a:hover {
  color: var(--cyan-bright);
}

.footer-contact-details {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer-contact-details a {
  color: var(--cyan-bright);
}

.footer-disclaim {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── SELECT COUNTRY PAGE ───────────────────────────────────── */
.stepper-section {
  padding: 36px 0 24px;
}

.checkout-stepper {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 36px;
  list-style: none;
  max-width: 600px;
  margin: 0 auto;
}

.checkout-stepper .step {
  display: flex;
  align-items: center;
  gap: 10px;
  opacity: 0.5;
}

.checkout-stepper .step.step-active {
  opacity: 1;
}

.checkout-stepper .step.step-complete {
  opacity: 0.85;
}

.step-indicator {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--border-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: #FFF;
}

.step-active .step-indicator {
  border-color: var(--cyan-bright);
  background: var(--cyan-tint);
  color: var(--cyan-bright);
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
}

.step-complete .step-indicator {
  border-color: var(--green-online);
  color: var(--green-online);
}

.step-details {
  display: flex;
  flex-direction: column;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-mono);
  text-transform: uppercase;
}

.step-label {
  font-size: 12px;
  font-weight: 600;
  color: #FFF;
}

.checkout-notice-card {
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  max-width: 780px;
  margin: 0 auto 36px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.notice-icon {
  font-size: 22px;
}

.notice-title {
  font-size: 1.1rem;
  color: #FFF;
  margin-bottom: 6px;
}

.notice-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.countries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  max-width: 960px;
  margin: 0 auto 60px;
}

.country-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  transition: var(--transition);
}

.country-card:hover {
  border-color: var(--cyan-bright);
  transform: translateY(-2px);
}

.country-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
}

.country-flag {
  font-size: 32px;
  line-height: 1;
}

.country-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: #FFF;
}

.country-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--cyan-bright);
  border: 1px solid var(--border-cyan);
  padding: 2px 6px;
  border-radius: 2px;
  display: inline-block;
  margin-top: 2px;
}

.country-note {
  font-size: 12px;
  color: var(--text-secondary);
}

.country-currency {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan-bright);
}

.country-card-footer {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-mono);
  text-align: center;
  padding-top: 8px;
  border-top: 1px solid var(--border-dim);
}

/* ── POLICY / LEGAL PAGES ──────────────────────────────────── */
.policy-page {
  padding: 60px 0 100px;
}

.policy-content {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
  padding: 44px;
  max-width: 860px;
  margin: 0 auto;
}

.policy-content h1 {
  font-size: 2.2rem;
  margin-bottom: 8px;
}

.policy-date {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-mono);
  margin-bottom: 28px;
  display: block;
}

.policy-content h2 {
  font-size: 1.35rem;
  margin-top: 28px;
  margin-bottom: 12px;
  color: var(--cyan-bright);
}

.policy-content p, .policy-content li {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
}

.policy-content ul {
  padding-left: 24px;
  margin-bottom: 16px;
}

/* ── RESPONSIVE RULES (DOWN TO 320px) ──────────────────────── */
@media (max-width: 1024px) {
  .packages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 960px) {
  .nav-links {
    display: none;
  }
  .hamburger-btn {
    display: block;
  }
  .sticky-grid {
    grid-template-columns: 1fr;
  }
  .sticky-frame {
    position: static;
  }
  .multizone-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .waveform-stages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .schematic-grid-notes {
    grid-template-columns: 1fr;
  }
  .unboxing-card-layout {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .telemetry-grid {
    grid-template-columns: 1fr;
  }
  .hud-readout-strip {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 680px) {
  .multizone-grid {
    grid-template-columns: 1fr;
  }
  .waveform-stages-grid {
    grid-template-columns: 1fr;
  }
  .packages-grid {
    grid-template-columns: 1fr;
  }
  .hud-readout-strip {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    padding: 14px;
  }
  .btn-sentinel-nav {
    display: none;
  }
  .sticky-bottom-bar {
    flex-direction: column;
    gap: 8px;
    padding: 10px 14px;
  }
  .sticky-btn-cta {
    width: 100%;
    justify-content: center;
  }
  .checkout-stepper {
    gap: 14px;
  }
}

@media (max-width: 480px) {
  .sentinel-hero {
    padding: 16px 0 48px;
  }
  .hero-container {
    display: flex;
    flex-direction: column;
  }
  .hero-top-meta {
    order: 1;
    gap: 8px;
    margin-bottom: 12px;
  }
  .sentinel-h1 {
    order: 2;
    font-size: 1.65rem;
    line-height: 1.12;
    margin-bottom: 14px;
  }
  .hotspot-stage {
    order: 3;
  }
  .hero-deploy-row {
    order: 4;
    margin-top: 18px;
  }
  .sentinel-sub {
    order: 5;
    margin: 20px auto 0;
  }
  .container, .container-narrow {
    padding: 0 14px;
  }
  .sentinel-sub {
    font-size: 0.95rem;
  }
  .hotspot-stage {
    padding: 12px 10px 16px;
  }
  .hotspot-image-pod {
    margin-bottom: 10px;
  }
  .hardware-img {
    max-height: 190px;
  }
  .mobile-hero-cta {
    display: flex;
    justify-content: center;
    width: 100%;
    margin: 0 0 16px;
    padding: 12px 8px;
    font-size: 11px;
    line-height: 1.3;
  }
  .hero-deploy-row > .btn-sentinel-hero {
    display: none;
  }
  .story-chapter {
    padding: 20px;
  }
  .schematic-display-card {
    padding: 24px 14px;
  }
  .policy-content {
    padding: 20px 14px;
  }
  .matrix-row {
    padding: 12px 14px;
    font-size: 11.5px;
  }
  .hud-readout-strip {
    grid-template-columns: 1fr;
  }
  .checkout-stepper {
    gap: 10px;
  }
  .step-label {
    display: none;
  }
  .checkout-notice-card {
    padding: 16px 12px;
    gap: 12px;
  }
  .btn-sentinel-hero {
    width: 100%;
    justify-content: center;
    padding: 14px 20px;
    font-size: 13px;
  }
}

/* Hard 320px screen guard */
@media (max-width: 340px) {
  .container, .container-narrow {
    padding: 0 10px;
  }
  .sentinel-h1 {
    font-size: 1.5rem;
  }
  .btn-sentinel-hero {
    font-size: 12px;
    padding: 12px 14px;
  }
  .matrix-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .matrix-row .v {
    text-align: left;
  }
}