/* 
 * NovaVault Landing Page Styles
 * Modern crypto-native design with neon accents and glassmorphism
 */

/* ===== CSS CUSTOM PROPERTIES (DESIGN TOKENS) ===== */
:root {
  /* Color System */
  --bg: #0B0F19;
  --panel: rgba(255, 255, 255, 0.06);
  --card: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.12);
  --primary: #9945FF;
  --accent: #14F195;
  --cyan: #22D3EE;
  --blue: #0EA5E9;
  --warning: #F4B400;
  --text: #E6E9F2;
  --muted: #A3AEC5;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #9945FF 0%, #22D3EE 50%, #14F195 100%);
  --gradient-bg: radial-gradient(1200px 800px at 70% 20%, rgba(153,69,255,0.35), rgba(20,241,149,0) 60%);
  
  /* Typography */
  --font-display: "Space Grotesk", "Urbanist", system-ui, -apple-system, sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;
  
  /* Spacing */
  --space-xs: 0.25rem;    /* 4px */
  --space-sm: 0.5rem;     /* 8px */
  --space-md: 1rem;       /* 16px */
  --space-lg: 1.5rem;     /* 24px */
  --space-xl: 2rem;       /* 32px */
  --space-2xl: 3rem;      /* 48px */
  --space-3xl: 4rem;      /* 64px */
  --space-4xl: 6rem;      /* 96px */
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.15);
  --shadow-glow: 0 0 20px rgba(153, 69, 255, 0.3);
  
  /* Animation */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --duration: 0.3s;
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  :root {
    --duration: 0.01ms;
  }
  
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===== RESET & BASE STYLES ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Typography Scale */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
  font-size: clamp(1rem, 2vw, 1.125rem);
  line-height: 1.7;
}

/* Links */
a {
  color: inherit;
  text-decoration: none;
  transition: all var(--duration) var(--ease);
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary);
  color: white;
  padding: 8px;
  border-radius: 4px;
  text-decoration: none;
  z-index: 1000;
}

.skip-link:focus {
  top: 6px;
}

/* ===== UTILITY CLASSES ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

/* ===== BUTTON STYLES ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid transparent;
  border-radius: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.875rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--duration) var(--ease);
  text-decoration: none;
  white-space: nowrap;
  min-height: 44px;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  box-shadow: 0 0 30px rgba(153, 69, 255, 0.5);
}

.btn-secondary {
  background: var(--card);
  color: var(--text);
  border-color: var(--border);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-large {
  padding: var(--space-md) var(--space-lg);
  font-size: 1rem;
  min-height: 56px;
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* ===== HEADER STYLES ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 15, 25, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: all var(--duration) var(--ease);
}

.header.scrolled {
  background: rgba(11, 15, 25, 0.95);
  border-bottom-color: rgba(255, 255, 255, 0.2);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
}

.nav-links a {
  color: var(--muted);
  font-weight: 500;
  transition: color var(--duration) var(--ease);
}

.nav-links a:hover,
.nav-links a:focus {
  color: var(--text);
}

.nav-cta {
  display: flex;
  gap: var(--space-sm);
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: all var(--duration) var(--ease);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

.mobile-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(11, 15, 25, 0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration) var(--ease);
}

.mobile-menu[aria-hidden="false"] {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-menu-content {
  padding: var(--space-lg);
}

.mobile-nav-links {
  list-style: none;
  margin-bottom: var(--space-lg);
}

.mobile-nav-links li {
  border-bottom: 1px solid var(--border);
}

.mobile-nav-links a {
  display: block;
  padding: var(--space-md) 0;
  color: var(--text);
  font-weight: 500;
}

.mobile-nav-cta {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

/* ===== HERO SECTION ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 160px;
  padding-bottom: var(--space-2xl);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: var(--gradient-bg);
  opacity: 0.7;
}

.particles-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-title {
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.8s var(--ease);
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  color: var(--muted);
  margin-bottom: var(--space-2xl);
  line-height: 1.6;
  animation: fadeInUp 0.8s var(--ease) 0.1s both;
}

.trust-signals {
  display: flex;
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
  animation: fadeInUp 0.8s var(--ease) 0.2s both;
}

.trust-item {
  text-align: center;
}

.trust-number {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: var(--space-xs);
}

.trust-label {
  font-size: 0.875rem;
  color: var(--muted);
}

.hero-ctas {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  animation: fadeInUp 0.8s var(--ease) 0.3s both;
}

.cta-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.download-options {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
}

.download-option {
  padding: var(--space-sm);
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  backdrop-filter: blur(10px);
  transition: all var(--duration) var(--ease);
}

.download-option:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
}

.compliance-note {
  font-size: 0.875rem;
  color: var(--muted);
  text-align: center;
  margin-top: var(--space-md);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeInUp 0.8s var(--ease) 0.4s both;
}

.phone-mockup {
  position: relative;
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
}

.phone-glow {
  position: absolute;
  inset: -20px;
  background: radial-gradient(circle, rgba(153, 69, 255, 0.2) 0%, transparent 70%);
  border-radius: 50px;
  animation: pulse 4s ease-in-out infinite;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 0.6;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }
}

/* ===== TRUST BAND ===== */
.trust-band {
  padding: var(--space-4xl) 0;
  text-align: center;
}

.trust-title {
  font-size: 1.125rem;
  color: var(--muted);
  margin-bottom: var(--space-2xl);
}

.trust-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.trust-logos img {
  opacity: 0.5;
  filter: grayscale(100%);
  transition: all var(--duration) var(--ease);
}

.trust-logos img:hover {
  opacity: 1;
  filter: grayscale(0%);
  transform: scale(1.1);
}

/* ===== SECTION STYLES ===== */
.section-header {
  text-align: center;
  margin-bottom: var(--space-4xl);
}

.section-title {
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== FEATURES SECTION ===== */
.features {
  padding: var(--space-4xl) 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: var(--space-xl);
  backdrop-filter: blur(20px);
  transition: all var(--duration) var(--ease);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.feature-card:hover {
  transform: translateY(-4px) rotate(1deg);
  border-color: rgba(153, 69, 255, 0.3);
  box-shadow: 0 20px 40px rgba(153, 69, 255, 0.1);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-primary);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
}

.feature-card h3 {
  margin-bottom: var(--space-md);
  font-size: 1.25rem;
}

.feature-card p {
  color: var(--muted);
  margin-bottom: var(--space-lg);
}

.feature-link {
  color: var(--accent);
  font-weight: 500;
  font-size: 0.875rem;
  transition: all var(--duration) var(--ease);
}

.feature-link:hover {
  color: var(--cyan);
  transform: translateX(4px);
}

/* ===== SECURITY SECTION ===== */
.security {
  padding: var(--space-4xl) 0;
  background: linear-gradient(180deg, transparent 0%, rgba(153, 69, 255, 0.05) 100%);
}

.security-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.security-features {
  list-style: none;
  margin: var(--space-2xl) 0;
}

.security-features li {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border);
}

.security-features li:last-child {
  border-bottom: none;
}

.security-diagram {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  justify-content: center;
}

.diagram-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  text-align: center;
  min-width: 80px;
}

.step-icon {
  width: 48px;
  height: 48px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.diagram-arrow {
  color: var(--accent);
  font-size: 1.5rem;
  margin: 0 var(--space-sm);
}

/* ===== HOW IT WORKS ===== */
.how-it-works {
  padding: var(--space-4xl) 0;
}

.steps-timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-xl);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  backdrop-filter: blur(20px);
  transition: all var(--duration) var(--ease);
}

.step:hover {
  transform: translateY(-4px);
  border-color: rgba(20, 241, 149, 0.3);
}

.step-number {
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: var(--space-lg);
}

.step h3 {
  margin-bottom: var(--space-md);
  font-size: 1.25rem;
}

.step p {
  color: var(--muted);
  margin-bottom: var(--space-lg);
}

/* ===== CHAINS SECTION ===== */
.chains {
  padding: var(--space-4xl) 0;
}

.chains-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.chains-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
}

.chain-chip {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 24px;
  font-size: 0.875rem;
  font-weight: 500;
  backdrop-filter: blur(10px);
  transition: all var(--duration) var(--ease);
}

.chain-chip:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
}

.chain-chip.more-chains {
  background: var(--gradient-primary);
  color: white;
}

.dapps-grid {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.dapp-logo {
  padding: var(--space-md);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  transition: all var(--duration) var(--ease);
}

.dapp-logo:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: scale(1.1);
}

/* ===== SCREENS SECTION ===== */
.screens {
  padding: var(--space-4xl) 0;
}

.screens-slider {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2xl);
}

.phone-frame {
  position: relative;
  width: 320px;
  height: 640px;
  background: linear-gradient(145deg, #1a1a2e, #16213e);
  border-radius: 24px;
  padding: 20px;
  box-shadow: var(--shadow-lg);
}

.screens-container {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 16px;
  overflow: hidden;
}

.screen {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--duration) var(--ease);
}

.screen.active {
  opacity: 1;
}

.screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 16px;
}

.screens-nav {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  justify-content: center;
}

.screen-nav-btn {
  padding: var(--space-sm) var(--space-md);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 24px;
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration) var(--ease);
  backdrop-filter: blur(10px);
}

.screen-nav-btn:hover,
.screen-nav-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* ===== PRICING SECTION ===== */
.pricing {
  padding: var(--space-4xl) 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  max-width: 800px;
  margin: 0 auto;
}

.pricing-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: var(--space-2xl);
  backdrop-filter: blur(20px);
  transition: all var(--duration) var(--ease);
}

.pricing-card:hover {
  transform: translateY(-4px);
  border-color: rgba(153, 69, 255, 0.3);
}

.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: 0 0 40px rgba(153, 69, 255, 0.2);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: white;
  padding: var(--space-xs) var(--space-md);
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}

.pricing-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.pricing-header h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
}

.price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: var(--space-xs);
}

.currency {
  font-size: 1.25rem;
  color: var(--muted);
}

.amount {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text);
}

.period {
  font-size: 1rem;
  color: var(--muted);
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--space-2xl);
}

.pricing-features li {
  padding: var(--space-sm) 0;
  color: var(--muted);
}

/* ===== TESTIMONIALS ===== */
.testimonials {
  padding: var(--space-4xl) 0;
}

.testimonials-slider {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.testimonial {
  opacity: 0;
  transform: translateX(100%);
  transition: all var(--duration) var(--ease);
  position: absolute;
  inset: 0;
}

.testimonial.active {
  opacity: 1;
  transform: translateX(0);
  position: relative;
}

.testimonial-content {
  text-align: center;
  padding: var(--space-2xl);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  backdrop-filter: blur(20px);
}

.stars {
  display: flex;
  justify-content: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

.testimonial blockquote {
  font-size: 1.25rem;
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  font-style: italic;
}

.testimonial cite {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  font-style: normal;
}

.testimonial cite img {
  border-radius: 50%;
}

.testimonial cite div {
  text-align: left;
}

.testimonial cite strong {
  display: block;
  margin-bottom: var(--space-xs);
}

.testimonial cite span {
  font-size: 0.875rem;
  color: var(--muted);
}

/* ===== FAQ SECTION ===== */
.faq {
  padding: var(--space-4xl) 0;
}

.faq-accordion {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) 0;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.125rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: all var(--duration) var(--ease);
}

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

.faq-question img {
  transition: transform var(--duration) var(--ease);
}

.faq-question[aria-expanded="true"] img {
  transform: rotate(180deg);
}

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

.faq-answer[aria-hidden="false"] {
  max-height: 200px;
}

.faq-answer p {
  padding: 0 0 var(--space-lg) 0;
  color: var(--muted);
}

/* ===== FINAL CTA ===== */
.final-cta {
  padding: var(--space-4xl) 0;
  background: linear-gradient(180deg, transparent 0%, rgba(153, 69, 255, 0.1) 100%);
  text-align: center;
}

.cta-content h2 {
  margin-bottom: var(--space-md);
}

.cta-content p {
  font-size: 1.125rem;
  color: var(--muted);
  margin-bottom: var(--space-2xl);
}

.cta-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  margin-bottom: var(--space-lg);
}

.cta-note {
  font-size: 0.875rem;
  color: var(--muted);
}

.cta-note a {
  color: var(--accent);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--card);
  border-top: 1px solid var(--border);
  padding: var(--space-4xl) 0 var(--space-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-column h4 {
  font-size: 1rem;
  margin-bottom: var(--space-md);
  color: var(--text);
}

.footer-column ul {
  list-style: none;
}

.footer-column ul li {
  margin-bottom: var(--space-sm);
}

.footer-column ul li a {
  color: var(--muted);
  transition: color var(--duration) var(--ease);
}

.footer-column ul li a:hover {
  color: var(--text);
}

.social-links {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--panel);
  border-radius: 8px;
  transition: all var(--duration) var(--ease);
}

.social-links a:hover {
  background: var(--primary);
  transform: translateY(-2px);
}

.newsletter-form {
  display: flex;
  gap: var(--space-sm);
}

.newsletter-form input {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.875rem;
}

.newsletter-form input::placeholder {
  color: var(--muted);
}

.newsletter-form button {
  padding: var(--space-sm);
  background: var(--primary);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--duration) var(--ease);
}

.newsletter-form button:hover {
  background: var(--cyan);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.875rem;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (min-width: 1025px) {
  .hero {
    padding-top: 180px;
  }
}

@media (max-width: 1024px) {
  .nav-links {
    display: none;
  }
  
  .nav-cta {
    display: none;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .hero {
    padding-top: 120px;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .security-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-sm);
  }
  
  .hero {
    padding-top: 120px;
    padding-bottom: var(--space-xl);
  }
  
  .trust-signals {
    flex-direction: column;
    gap: var(--space-md);
  }
  
  .cta-buttons {
    flex-direction: column;
  }
  
  .phone-frame {
    width: 280px;
    height: 560px;
  }
  
  .diagram-arrow {
    transform: rotate(90deg);
  }
}

@media (max-width: 480px) {
  .hero {
    padding-top: 130px;
    min-height: 90vh;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .steps-timeline {
    grid-template-columns: 1fr;
  }
  
  .trust-logos {
    gap: var(--space-md);
  }
  
  .chains-grid {
    justify-content: flex-start;
  }
  
  .dapps-grid {
    justify-content: flex-start;
  }
}

/* ===== DARK MODE SUPPORT ===== */
@media (prefers-color-scheme: light) {
  /* Light mode adjustments if needed */
}

/* ===== FOCUS STYLES ===== */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ===== HIGH CONTRAST MODE ===== */
@media (prefers-contrast: high) {
  :root {
    --border: rgba(255, 255, 255, 0.3);
  }
}