/* ==========================================================================
   JARVIS AI Android - Modern Futuristic Responsive Stylesheet
   Designed for Mobile, Tablet, and Desktop / Laptop screens.
   Cloudflare Pages (.pages.dev) Optimized
   ========================================================================== */

:root {
  /* Colors */
  --bg-primary: #070b14;
  --bg-secondary: #0d1424;
  --bg-tertiary: #141f36;
  --bg-card: rgba(13, 22, 41, 0.75);
  --bg-card-hover: rgba(20, 34, 64, 0.9);
  
  --cyan-primary: #00f2fe;
  --cyan-glow: rgba(0, 242, 254, 0.45);
  --blue-primary: #4facfe;
  --blue-accent: #0066ff;
  --purple-accent: #7928ca;
  
  --text-main: #f0f6fc;
  --text-muted: #8b9bb4;
  --text-dim: #5c6b84;
  
  --border-glass: rgba(0, 242, 254, 0.18);
  --border-glass-hover: rgba(0, 242, 254, 0.5);
  --glass-blur: blur(16px);
  
  /* Fonts */
  --font-heading: 'Orbitron', -apple-system, sans-serif;
  --font-subheading: 'Rajdhani', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Transitions */
  --tr-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --tr-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* Background Cyber Elements */
.cyber-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.25;
}

.glow-top-left {
  top: -150px;
  left: -150px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--cyan-primary) 0%, transparent 70%);
}

.glow-bottom-right {
  bottom: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--blue-accent) 0%, var(--purple-accent) 50%, transparent 70%);
}

.grid-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(0, 242, 254, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 242, 254, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.2) 80%);
}

/* Layout Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

/* Typography Helpers */
.gradient-text {
  background: linear-gradient(135deg, #ffffff 10%, var(--cyan-primary) 60%, var(--blue-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.75rem 1.6rem;
  font-family: var(--font-subheading);
  font-size: 1.05rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-decoration: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--tr-fast);
  border: 1px solid transparent;
}

.btn-icon {
  width: 1.15rem;
  height: 1.15rem;
}

.btn-primary {
  background: linear-gradient(135deg, #00d2ff 0%, #0066ff 100%);
  color: #050a14;
  font-weight: 800;
  box-shadow: 0 4px 20px rgba(0, 210, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(0, 210, 255, 0.6);
  background: linear-gradient(135deg, #26d8ff 0%, #1a75ff 100%);
}

.btn-glow {
  position: relative;
}

.btn-glow::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--cyan-primary), var(--blue-primary));
  opacity: 0.4;
  filter: blur(8px);
  z-index: -1;
  transition: opacity var(--tr-fast);
}

.btn-glow:hover::after {
  opacity: 0.8;
}

.btn-secondary {
  background: rgba(13, 22, 41, 0.8);
  border-color: var(--border-glass);
  color: var(--text-main);
  backdrop-filter: var(--glass-blur);
}

.btn-secondary:hover {
  border-color: var(--cyan-primary);
  background: rgba(20, 34, 64, 0.9);
  color: var(--cyan-primary);
  transform: translateY(-2px);
}

/* Dedicated Windows PC Button (Vibrant & High Contrast) */
.btn-pc {
  background: linear-gradient(135deg, #3b82f6 0%, #6366f1 50%, #8b5cf6 100%);
  color: #ffffff !important;
  font-weight: 800;
  border: 1px solid rgba(167, 139, 250, 0.45);
  box-shadow: 0 4px 22px rgba(99, 102, 241, 0.4);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.btn-pc:hover {
  background: linear-gradient(135deg, #60a5fa 0%, #818cf8 50%, #a855f7 100%);
  color: #ffffff !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(139, 92, 246, 0.7);
  border-color: #c084fc;
}

.btn-pc.btn-glow::after {
  background: linear-gradient(135deg, #6366f1, #a855f7);
  opacity: 0.6;
}

.btn-pc .btn-icon {
  stroke: #ffffff;
}

.btn-nav {
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid var(--border-glass);
  color: var(--cyan-primary);
  padding: 0.5rem 1.1rem;
  font-size: 0.95rem;
}

.btn-nav:hover {
  background: var(--cyan-primary);
  color: #070b14;
  box-shadow: 0 0 16px var(--cyan-glow);
}

.btn-large {
  padding: 0.95rem 2.2rem;
  font-size: 1.15rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid var(--border-glass);
  color: var(--cyan-primary);
}

.btn-sm:hover {
  background: var(--cyan-primary);
  color: #070b14;
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  width: 100%;
  background: rgba(7, 11, 20, 0.82);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid rgba(0, 242, 254, 0.12);
  z-index: 100;
  transition: all var(--tr-fast);
}

.nav-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.logo-icon {
  position: relative;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-core {
  width: 12px;
  height: 12px;
  background: var(--cyan-primary);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--cyan-primary);
}

.logo-ring {
  position: absolute;
  inset: 0;
  border: 2px dashed var(--cyan-primary);
  border-radius: 50%;
  animation: spin 8s linear infinite;
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.08em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-family: var(--font-subheading);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: color var(--tr-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--cyan-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--cyan-primary);
  transition: width var(--tr-fast);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Mobile Toggle Hamburger */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 101;
}

.mobile-menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all var(--tr-fast);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
  background: var(--cyan-primary);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
  background: var(--cyan-primary);
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: 65px;
  left: 0;
  width: 100%;
  background: rgba(7, 11, 20, 0.98);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-glass);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transform: translateY(-120%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--tr-smooth);
}

.mobile-drawer.open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav-link {
  color: var(--text-main);
  text-decoration: none;
  font-family: var(--font-subheading);
  font-size: 1.3rem;
  font-weight: 700;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-nav-link:hover {
  color: var(--cyan-primary);
}

.mobile-drawer-btn {
  margin-top: 1rem;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  padding: 4.5rem 0 3.5rem;
  position: relative;
  overflow: hidden;
}

.hero-container {
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

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

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 2.25rem;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta-group {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.hero-spec-chips {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid var(--border-glass);
  border-radius: 50px;
  margin-bottom: 1.5rem;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--cyan-primary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--cyan-primary);
  animation: pulse-glow 2s infinite;
}

.badge-text {
  font-family: var(--font-subheading);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cyan-primary);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 3.25rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 2.25rem;
  max-width: 580px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.hero-spec-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.spec-chip {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  background: rgba(13, 22, 41, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 6px;
  font-size: 0.85rem;
}

.chip-label {
  color: var(--text-dim);
}

.chip-val {
  color: var(--text-main);
  font-weight: 600;
}

/* ==========================================================================
   Metrics Banner
   ========================================================================== */
.metrics-banner {
  padding: 2.5rem 0;
  background: rgba(13, 20, 36, 0.5);
  border-top: 1px solid rgba(0, 242, 254, 0.08);
  border-bottom: 1px solid rgba(0, 242, 254, 0.08);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  text-align: center;
}

.metric-card {
  padding: 1rem;
}

.metric-number {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--cyan-primary);
  text-shadow: 0 0 16px var(--cyan-glow);
  margin-bottom: 0.35rem;
}

.metric-label {
  font-family: var(--font-subheading);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-subheading);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--cyan-primary);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   Features Grid
   ========================================================================== */
.features {
  padding: 6rem 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: all var(--tr-smooth);
  backdrop-filter: var(--glass-blur);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--cyan-primary), transparent);
  opacity: 0;
  transition: opacity var(--tr-fast);
}

.feature-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: var(--border-glass-hover);
  box-shadow: 0 12px 30px rgba(0, 242, 254, 0.12);
}

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

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: 10px;
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan-primary);
  margin-bottom: 1.25rem;
}

.feature-icon-box svg {
  width: 26px;
  height: 26px;
}

.feature-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-main);
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.feature-footer {
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.feature-tag {
  font-family: var(--font-subheading);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--cyan-primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ==========================================================================
   Showcase / Mockup Section
   ========================================================================== */
.preview-section {
  padding: 5rem 0 6rem;
  background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(13, 20, 36, 0.7) 50%, var(--bg-primary) 100%);
}

.mockup-display {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  align-items: center;
  gap: 4rem;
}

.phone-frame {
  width: 320px;
  height: 620px;
  margin: 0 auto;
  background: #000;
  border-radius: 42px;
  border: 4px solid #1e293b;
  box-shadow: 
    0 0 0 2px #0f172a,
    0 20px 50px rgba(0, 0, 0, 0.8),
    0 0 35px rgba(0, 242, 254, 0.25);
  position: relative;
  padding: 12px;
  overflow: hidden;
}

.phone-speaker {
  width: 60px;
  height: 4px;
  background: #334155;
  border-radius: 4px;
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
}

.phone-camera {
  width: 10px;
  height: 10px;
  background: #0f172a;
  border-radius: 50%;
  position: absolute;
  top: 11px;
  right: 95px;
  z-index: 20;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: #080c16;
  border-radius: 32px;
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
}

.app-screenshot-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 32px;
  display: block;
}

.app-ui {
  padding: 1.5rem 1rem 1rem;
  display: flex;
  flex-direction: column;
  height: 100%;
  gap: 1rem;
}

.app-status-bar {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-dim);
  padding: 0 0.5rem;
}

.status-icons {
  display: flex;
  gap: 0.5rem;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem;
}

.app-logo-badge {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--cyan-primary);
}

.app-connection-badge {
  font-size: 0.7rem;
  font-weight: 700;
  color: #00ff88;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.pulse-dot {
  width: 6px;
  height: 6px;
  background: #00ff88;
  border-radius: 50%;
  animation: pulse-glow 1.5s infinite;
}

.app-visualizer {
  height: 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  margin: 0.5rem 0;
}

.hologram-ring {
  width: 80px;
  height: 80px;
  border: 2px dashed var(--cyan-primary);
  border-radius: 50%;
  position: absolute;
  animation: spin 6s linear infinite;
}

.hologram-core {
  width: 44px;
  height: 44px;
  background: radial-gradient(circle, var(--cyan-primary) 0%, var(--blue-accent) 100%);
  border-radius: 50%;
  box-shadow: 0 0 20px var(--cyan-primary);
  animation: pulse-glow 2s infinite alternate;
}

.hologram-text {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  color: var(--cyan-primary);
  margin-top: 100px;
  letter-spacing: 0.1em;
}

.app-chat-card {
  background: rgba(13, 22, 41, 0.85);
  border-left: 3px solid #4facfe;
  padding: 0.6rem 0.8rem;
  border-radius: 6px;
  font-size: 0.75rem;
}

.app-chat-card.response {
  border-left-color: var(--cyan-primary);
  background: rgba(0, 242, 254, 0.08);
}

.chat-speaker {
  font-weight: 700;
  font-size: 0.7rem;
  margin-bottom: 0.2rem;
}

.app-controls {
  margin-top: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.app-ctrl-btn {
  background: rgba(13, 22, 41, 0.9);
  border: 1px solid var(--border-glass);
  color: var(--text-main);
  padding: 0.55rem;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 600;
  cursor: pointer;
}

.app-ctrl-btn.active {
  border-color: var(--cyan-primary);
  color: var(--cyan-primary);
  background: rgba(0, 242, 254, 0.12);
}

/* Showcase Side Details */
.showcase-details {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.detail-box {
  display: flex;
  gap: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  padding: 1.5rem;
  border-radius: 12px;
  backdrop-filter: var(--glass-blur);
  transition: transform var(--tr-fast);
}

.detail-box:hover {
  transform: translateX(6px);
  border-color: var(--border-glass-hover);
}

.detail-num {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--cyan-primary);
  line-height: 1;
}

.detail-content h4 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--text-main);
}

.detail-content p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* ==========================================================================
   Downloads Section
   ========================================================================== */
.downloads-section {
  padding: 6rem 0;
}

.featured-download-card {
  background: linear-gradient(135deg, rgba(13, 22, 41, 0.9) 0%, rgba(10, 28, 56, 0.95) 100%);
  border: 2px solid rgba(0, 242, 254, 0.4);
  border-radius: 16px;
  padding: 2.5rem;
  position: relative;
  box-shadow: 0 10px 40px rgba(0, 242, 254, 0.15);
  margin-bottom: 3.5rem;
}

.download-badge {
  position: absolute;
  top: -14px;
  left: 2rem;
  background: linear-gradient(90deg, #00d2ff, #0066ff);
  color: #050a14;
  font-family: var(--font-subheading);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 0.3rem 1rem;
  border-radius: 50px;
}

.card-body-flex {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  align-items: center;
  gap: 2.5rem;
}

.release-title {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  color: var(--text-main);
}

.release-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.release-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.88rem;
  color: var(--cyan-primary);
}

.card-action {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.btn-subtext {
  font-size: 0.88rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--tr-fast);
}

.btn-subtext:hover {
  color: var(--cyan-primary);
}

/* ==========================================================================
   Installation Guide Steps
   ========================================================================== */
.install-section {
  padding: 5rem 0;
  background: rgba(13, 20, 36, 0.4);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  padding: 2rem 1.5rem;
  position: relative;
  transition: transform var(--tr-fast);
}

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

.step-badge {
  width: 42px;
  height: 42px;
  background: rgba(0, 242, 254, 0.12);
  border: 1px solid var(--border-glass);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--cyan-primary);
  margin-bottom: 1.25rem;
}

.step-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.step-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.step-desc code {
  background: rgba(0, 242, 254, 0.1);
  color: var(--cyan-primary);
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-section {
  padding: 6rem 0;
}

.faq-accordion {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  overflow: hidden;
  transition: border-color var(--tr-fast);
}

.faq-item.active {
  border-color: var(--cyan-primary);
}

.faq-question {
  width: 100%;
  background: transparent;
  border: none;
  padding: 1.25rem 1.5rem;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-subheading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  transition: color var(--tr-fast);
}

.faq-question:hover {
  color: var(--cyan-primary);
}

.faq-arrow {
  font-size: 1.5rem;
  color: var(--cyan-primary);
  transition: transform var(--tr-fast);
  line-height: 1;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--tr-smooth);
}

.faq-answer p {
  padding: 0 1.5rem 1.25rem;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.6;
}

.link-cyan {
  color: var(--cyan-primary);
  text-decoration: underline;
}

/* ==========================================================================
   Bottom CTA Banner
   ========================================================================== */
.cta-banner {
  padding: 5rem 0;
  background: radial-gradient(circle at center, rgba(0, 102, 255, 0.25) 0%, rgba(7, 11, 20, 0.95) 75%);
  border-top: 1px solid var(--border-glass);
  text-align: center;
}

.cta-container {
  max-width: 720px;
}

.cta-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.cta-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: #04070d;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 4.5rem 0 0;
}

.footer-container {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 3rem;
  padding-bottom: 3.5rem;
}

.footer-logo {
  margin-bottom: 1rem;
}

.footer-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color var(--tr-fast);
}

.footer-links a:hover {
  color: var(--cyan-primary);
}

.attribution-note {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 1.5rem 0;
}

.bottom-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-dim);
  font-size: 0.88rem;
}

/* Toast Message */
.toast {
  position: fixed;
  bottom: -100px;
  right: 2rem;
  background: rgba(7, 11, 20, 0.95);
  border: 1px solid var(--cyan-primary);
  box-shadow: 0 8px 30px rgba(0, 242, 254, 0.25);
  padding: 1rem 1.5rem;
  border-radius: 10px;
  display: flex;
  align-items: center;
  gap: 1rem;
  z-index: 1000;
  backdrop-filter: var(--glass-blur);
  transition: bottom var(--tr-smooth);
}

.toast.show {
  bottom: 2rem;
}

.toast-icon {
  width: 32px;
  height: 32px;
  background: var(--cyan-primary);
  color: #070b14;
  font-weight: 800;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.toast-content {
  display: flex;
  flex-direction: column;
}

.toast-content strong {
  font-size: 0.95rem;
  color: var(--text-main);
}

.toast-content span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Keyframe Animations
   ========================================================================== */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes spin-reverse {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}

@keyframes pulse-glow {
  0% { transform: scale(0.95); opacity: 0.7; }
  100% { transform: scale(1.05); opacity: 1; }
}

@keyframes pulse-core {
  0% { transform: scale(0.9); opacity: 0.4; }
  100% { transform: scale(1.15); opacity: 0.8; }
}

@keyframes soundwave-anim {
  0% { transform: scaleY(0.4); }
  100% { transform: scaleY(1.4); }
}

/* ==========================================================================
   RESPONSIVE DESIGN BREAKPOINTS
   Mobile (< 768px), Tablet (768px - 1024px), Laptop/Desktop (> 1024px)
   ========================================================================== */

/* TABLET RESPONSIVE (768px to 1024px) */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 3rem;
  }

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

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta-group {
    justify-content: center;
  }

  .hero-spec-chips {
    justify-content: center;
  }

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

  .mockup-display {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .phone-frame {
    order: 1;
  }

  .showcase-details {
    order: 2;
  }

  .card-body-flex {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .release-meta {
    justify-content: center;
  }

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

  .footer-container {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

/* MOBILE RESPONSIVE (< 768px) */
@media (max-width: 768px) {
  .nav-links, .nav-actions .btn-nav {
    display: none;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .hero {
    padding: 2.5rem 0 2rem;
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .hero-desc {
    font-size: 1rem;
  }

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

  .metric-number {
    font-size: 1.75rem;
  }

  .metric-label {
    font-size: 0.9rem;
  }

  .section-title {
    font-size: 1.85rem;
  }

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

  .phone-frame {
    width: 290px;
    height: 560px;
  }

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

  .featured-download-card {
    padding: 1.75rem 1.25rem;
  }

  .release-title {
    font-size: 1.3rem;
  }

  .footer-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .bottom-flex {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }

  .hero-cta-group .btn {
    width: 100%;
  }

  .cta-buttons .btn {
    width: 100%;
  }

  .toast {
    right: 1rem;
    left: 1rem;
    bottom: -150px;
  }
}