/* ============================================================
   Neon LED Pro — Premium Landing Page Stylesheet
   ============================================================ */

/* --- Design Tokens --- */
:root {
  --bg-base: #030711;
  --bg-elevated: #0a1128;
  --bg-card: rgba(10, 17, 40, 0.65);
  --bg-card-hover: rgba(15, 25, 55, 0.8);

  --accent-cyan: #00e5ff;
  --accent-emerald: #00e88f;
  --accent-violet: #8b5cf6;
  --accent-pink: #ec4899;
  --accent-amber: #f59e0b;

  --text-white: #f1f5f9;
  --text-muted: #7c8db5;
  --text-dim: #4a5d88;

  --glass: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(255, 255, 255, 0.15);

  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-xl: 40px;

  --shadow-glow-cyan: 0 0 30px rgba(0, 229, 255, 0.15);
  --shadow-glow-strong: 0 0 60px rgba(0, 229, 255, 0.25);

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 0.35s var(--ease);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

body {
  background: var(--bg-base);
  color: var(--text-white);
  font-family: var(--font);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* --- Language Toggle --- */
body.lang-vi .en { display: none !important; }
body.lang-en .vi { display: none !important; }

/* --- Layout --- */
.container {
  width: min(92%, 1240px);
  margin: 0 auto;
}

/* ============================================================
   BACKGROUND SYSTEM
   ============================================================ */
.bg-aurora {
  position: fixed;
  inset: 0;
  z-index: -3;
  background:
    radial-gradient(ellipse 80% 50% at 20% 20%, rgba(0, 229, 255, 0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse 50% 50% at 50% 40%, rgba(0, 232, 143, 0.04) 0%, transparent 50%);
  animation: auroraShift 20s ease-in-out infinite alternate;
}

@keyframes auroraShift {
  0% { filter: blur(80px) hue-rotate(0deg); }
  50% { filter: blur(100px) hue-rotate(15deg); }
  100% { filter: blur(80px) hue-rotate(-10deg); }
}

.bg-noise {
  position: fixed;
  inset: 0;
  z-index: -2;
  opacity: 0.025;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.7' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 256px 256px;
}

.bg-particles {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--accent-cyan);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat 8s ease-in-out infinite;
}

@keyframes particleFloat {
  0%, 100% { opacity: 0; transform: translateY(0) scale(1); }
  20% { opacity: 0.6; }
  50% { opacity: 0.3; transform: translateY(-200px) scale(0.5); }
  80% { opacity: 0.1; }
}

/* ============================================================
   NAVIGATION BAR
   ============================================================ */
.nav-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}

.nav-bar.scrolled {
  padding: 8px 0;
}

.nav-bar.scrolled .nav-inner {
  background: rgba(3, 7, 17, 0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1240px;
  margin: 0 auto;
  padding: 12px 24px;
  border-radius: 100px;
  transition: var(--transition);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-icon-img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.25);
  transition: var(--transition);
}

.logo:hover .logo-icon-img {
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.45);
  transform: scale(1.05);
}

.logo-text {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--text-white);
  background: var(--glass);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-btn {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-white);
  padding: 6px 14px;
  border-radius: 100px;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 700;
  font-family: var(--font);
  transition: var(--transition);
}

.lang-btn:hover {
  background: var(--glass-border-hover);
  border-color: var(--accent-cyan);
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 100px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-emerald));
  color: #000;
  font-size: 0.88rem;
  font-weight: 700;
  transition: var(--transition);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
}

.download-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 35px rgba(0, 229, 255, 0.35);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-white);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 100px;
  font-family: var(--font);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
}

.btn-glow {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-emerald));
  color: #000;
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
}

.btn-glow:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: var(--shadow-glow-strong);
}

.btn-glow::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s;
}

.btn-glow:hover::after {
  transform: translateX(100%);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--glass-border-hover);
  color: var(--text-white);
}

.btn-outline:hover {
  background: var(--glass);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-xl {
  padding: 18px 40px;
  font-size: 1.1rem;
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  min-height: 100vh;
  padding: 140px 0 80px;
  width: min(92%, 1240px);
  margin: 0 auto;
}

.hero-content { position: relative; z-index: 2; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  border-radius: 100px;
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.2);
  color: var(--accent-cyan);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent-cyan);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
  font-size: clamp(2.8rem, 5.5vw, 4.5rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-title em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-emerald));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 470px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
}

.stat strong {
  display: block;
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--accent-emerald), var(--accent-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat span {
  font-size: 0.78rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 600;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--glass-border);
}

/* Hero Visual */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 550px;
}

.hero-phone-stack {
  position: relative;
  width: 320px;
  height: 540px;
}

.hero-phone {
  position: absolute;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #000;
  border: 2px solid rgba(255,255,255,0.1);
  box-shadow: 0 30px 60px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.05);
  transition: var(--transition);
}

.hero-phone img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-phone-front {
  width: 220px;
  height: 440px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) rotate(0deg);
  z-index: 3;
  box-shadow: 0 40px 80px rgba(0,0,0,0.7), 0 0 40px rgba(0, 229, 255, 0.1);
}

.hero-phone-mid {
  width: 190px;
  height: 380px;
  right: -10px;
  top: 50%;
  transform: translateY(-50%) rotate(12deg);
  z-index: 2;
  opacity: 0.85;
  animation: heroFloat 5s ease-in-out infinite;
}

.hero-phone-back {
  width: 190px;
  height: 380px;
  left: -10px;
  top: 50%;
  transform: translateY(-50%) rotate(-12deg);
  z-index: 1;
  opacity: 0.75;
  animation: heroFloat 5s ease-in-out infinite 1.5s;
}

@keyframes heroFloat {
  0%, 100% { transform: translateY(-50%) rotate(var(--r, 12deg)) translateY(0); }
  50% { transform: translateY(-50%) rotate(var(--r, 12deg)) translateY(-12px); }
}

.hero-phone-back { --r: -12deg; }
.hero-phone-mid { --r: 12deg; }

.hero-glow-ring {
  position: absolute;
  width: 450px;
  height: 450px;
  border-radius: 50%;
  border: 1px solid rgba(0, 229, 255, 0.1);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 0;
  animation: glowRingPulse 4s ease-in-out infinite;
}

.hero-glow-ring::after {
  content: '';
  position: absolute;
  inset: -30px;
  border-radius: 50%;
  border: 1px solid rgba(139, 92, 246, 0.06);
}

@keyframes glowRingPulse {
  0%, 100% { opacity: 0.3; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.6; transform: translate(-50%, -50%) scale(1.05); }
}

/* ============================================================
   LED TICKER
   ============================================================ */
.led-ticker {
  width: min(92%, 1240px);
  margin: 0 auto 0;
  background: #000;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 18px;
  overflow: hidden;
  position: relative;
}

.led-ticker::before,
.led-ticker::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 80px;
  z-index: 2;
  pointer-events: none;
}

.led-ticker::before {
  left: 0;
  background: linear-gradient(90deg, #000 0%, transparent 100%);
}

.led-ticker::after {
  right: 0;
  background: linear-gradient(90deg, transparent 0%, #000 100%);
}

.led-ticker-track {
  display: flex;
  white-space: nowrap;
  animation: ticker 35s linear infinite;
}

.led-ticker-track span {
  font-weight: 900;
  font-size: 2rem;
  color: var(--accent-cyan);
  text-shadow:
    0 0 8px var(--accent-cyan),
    0 0 16px rgba(0, 229, 255, 0.5);
  letter-spacing: 4px;
  padding-right: 20px;
}

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

/* ============================================================
   SECTIONS COMMON
   ============================================================ */
.section {
  padding: 120px 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 100px;
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.2);
  color: var(--accent-violet);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 18px;
}

.section-header h2 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-violet));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-sub {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 550px;
  margin: 0 auto;
}

/* ============================================================
   BENTO GRID (Features)
   ============================================================ */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.bento-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.bento-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.3), transparent);
  opacity: 0;
  transition: var(--transition);
}

.bento-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--glass-border-hover);
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

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

.bento-lg {
  grid-column: span 1;
}

.bento-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  filter: saturate(1.2);
}

.bento-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-cyan);
  margin-bottom: 14px;
}

.bento-card h3 {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  line-height: 1.3;
}

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

.bento-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.bento-pills span {
  padding: 5px 14px;
  border-radius: 100px;
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.15);
  color: var(--accent-cyan);
  font-size: 0.78rem;
  font-weight: 600;
}

/* ============================================================
   iPAD CAROUSEL
   ============================================================ */
.device-carousel {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  overflow: hidden;
  border-radius: var(--radius-xl);
}

.carousel-track {
  display: flex;
  transition: transform 0.5s var(--ease);
}

.carousel-slide {
  min-width: 100%;
  padding: 0 20px;
  display: flex;
  justify-content: center;
}

.ipad-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  max-width: 800px;
  width: 100%;
}

.ipad-frame img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.8s var(--ease);
}

.ipad-frame:hover img {
  transform: scale(1.02);
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 28px 0 0;
}

.carousel-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-white);
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font);
}

.carousel-btn:hover {
  background: var(--glass-border-hover);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.carousel-dots {
  display: flex;
  gap: 8px;
}

.carousel-dots .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-dim);
  cursor: pointer;
  transition: var(--transition);
}

.carousel-dots .dot.active {
  width: 24px;
  border-radius: 100px;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.4);
}

/* ============================================================
   IPHONE GALLERY
   ============================================================ */
.phone-gallery {
  position: relative;
  overflow: hidden;
  margin: 0 -4%;
  padding: 20px 0;
}

.phone-gallery-track {
  display: flex;
  gap: 20px;
  padding: 0 30px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  -ms-overflow-style: none;
  -webkit-overflow-scrolling: touch;
}

.phone-gallery-track::-webkit-scrollbar {
  display: none;
}

.iphone-frame {
  min-width: 260px;
  max-width: 280px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  box-shadow: 0 16px 40px rgba(0,0,0,0.4);
  scroll-snap-align: center;
  transition: var(--transition);
  flex-shrink: 0;
}

.iphone-frame:hover {
  transform: translateY(-8px);
  box-shadow: 0 24px 60px rgba(0,0,0,0.5), 0 0 30px rgba(0, 229, 255, 0.08);
  border-color: var(--glass-border-hover);
}

.iphone-frame img {
  width: 100%;
  height: auto;
  display: block;
}

.section-alt {
  background: 
    radial-gradient(ellipse 60% 40% at 30% 50%, rgba(0, 229, 255, 0.03) 0%, transparent 60%),
    radial-gradient(ellipse 50% 30% at 70% 60%, rgba(139, 92, 246, 0.03) 0%, transparent 50%);
}

/* ============================================================
   USE CASES
   ============================================================ */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.usecase-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.usecase-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-violet));
  opacity: 0;
  transition: var(--transition);
}

.usecase-card:hover {
  transform: translateY(-8px);
  border-color: var(--glass-border-hover);
  box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}

.usecase-card:hover::after {
  opacity: 1;
}

.usecase-emoji {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.usecase-num {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--accent-cyan);
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.usecase-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.usecase-card p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ============================================================
   APP STORE PROMO
   ============================================================ */
.promo-scroll {
  overflow: hidden;
  margin: 0 -4%;
}

.promo-track {
  display: flex;
  gap: 20px;
  padding: 0 30px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  -ms-overflow-style: none;
  -webkit-overflow-scrolling: touch;
}

.promo-track::-webkit-scrollbar { display: none; }

.promo-card {
  min-width: 300px;
  max-width: 340px;
  flex-shrink: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  box-shadow: 0 16px 40px rgba(0,0,0,0.4);
  scroll-snap-align: center;
  transition: var(--transition);
}

.promo-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 24px 60px rgba(0,0,0,0.5);
}

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

/* ============================================================
   FINAL CTA
   ============================================================ */
.section-cta {
  padding: 80px 0 120px;
}

.cta-card {
  position: relative;
  background: linear-gradient(135deg, rgba(10, 17, 40, 0.9), rgba(20, 30, 60, 0.9));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 80px 60px;
  text-align: center;
  overflow: hidden;
}

.cta-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.12), transparent 70%);
  top: -250px;
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
  animation: ctaGlowPulse 5s ease-in-out infinite;
}

@keyframes ctaGlowPulse {
  0%, 100% { opacity: 0.5; transform: translateX(-50%) scale(1); }
  50% { opacity: 1; transform: translateX(-50%) scale(1.1); }
}

.cta-card h2 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 900;
  margin-bottom: 18px;
  letter-spacing: -0.03em;
}

.cta-card p {
  color: var(--text-muted);
  font-size: 1.15rem;
  max-width: 500px;
  margin: 0 auto 36px;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--glass-border);
  padding: 60px 0 40px;
}

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

.footer-brand strong {
  font-size: 1.2rem;
  display: block;
  margin-bottom: 6px;
}

.footer-brand p {
  color: var(--text-dim);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: 32px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.88rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--text-white);
}

/* ============================================================
   SCROLL REVEAL ANIMATIONS
   ============================================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-delay="100"] { transition-delay: 0.1s; }
[data-reveal-delay="150"] { transition-delay: 0.15s; }
[data-reveal-delay="200"] { transition-delay: 0.2s; }
[data-reveal-delay="250"] { transition-delay: 0.25s; }
[data-reveal-delay="300"] { transition-delay: 0.3s; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 60px;
    min-height: auto;
    padding: 130px 0 60px;
  }

  .hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .hero-desc { max-width: 550px; }
  .hero-buttons { justify-content: center; }

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

  .bento-lg { grid-column: span 2; }

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

@media (max-width: 768px) {
  .nav-links { display: none; }
  .download-btn { display: none; }
  .hamburger { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 10px;
    right: 10px;
    background: rgba(3, 7, 17, 0.95);
    backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 16px;
    gap: 4px;
    margin-top: 8px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
  }

  .hero {
    padding: 120px 0 40px;
    gap: 40px;
  }

  .hero-title {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .hero-phone-stack {
    width: 260px;
    height: 450px;
  }

  .hero-phone-front {
    width: 180px;
    height: 360px;
  }

  .hero-phone-mid,
  .hero-phone-back {
    width: 150px;
    height: 300px;
  }

  .hero-stats {
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .stat strong { font-size: 1.6rem; }

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

  .bento-lg { grid-column: span 1; }

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

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .btn { width: 100%; }

  .cta-card {
    padding: 50px 24px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }

  .iphone-frame {
    min-width: 220px;
    max-width: 240px;
  }

  .promo-card {
    min-width: 260px;
    max-width: 280px;
  }

  .section {
    padding: 80px 0;
  }
}

@media (max-width: 480px) {
  .hero-phone-stack {
    width: 220px;
    height: 380px;
  }

  .hero-phone-front {
    width: 160px;
    height: 320px;
  }

  .hero-phone-mid,
  .hero-phone-back {
    width: 130px;
    height: 260px;
  }

  .hero-glow-ring {
    width: 300px;
    height: 300px;
  }
}