:root {
  --primary: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #ec4899;
  --secondary-light: #f472b6;
  --tertiary: #10b981;
  --background: #f8fafc;
  --card-bg: #ffffff;
  --dark-bg: #1e1e2e;
  --dark-card: #2a2a3d;
  --text-dark: #1e293b;
  --text-light: #f8fafc;
  --text-muted: #64748b;
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark-mode {
  --background: #0f172a;
  --card-bg: #1e293b;
  --text-dark: #f8fafc;
  --text-muted: #cbd5e1;
}

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

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

body {
  font-family: 'Inter', sans-serif;
  background: var(--background);
  color: var(--text-dark);
  line-height: 1.5;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

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

button, input, select { 
  font-family: inherit; 
  border: none;
  outline: none;
}

button {
  cursor: pointer;
}

ul { 
  list-style: none; 
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (prefers-reduced-motion: reduce) {
  * { 
    transition: none !important; 
    animation: none !important; 
  }
}

/* Header Styles */
header {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(8px);
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition);
}

.dark-mode header {
  background: rgba(15, 23, 42, 0.8);
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: transform var(--transition);
}

.logo:hover {
  transform: translateY(-2px);
}

.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 1.1rem;
}

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

.nav-link {
  position: relative;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  transition: width var(--transition);
}

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

.theme-toggle {
  background: none;
  font-size: 1.25rem;
  color: var(--primary);
  transition: transform var(--transition);
}

.theme-toggle:hover {
  transform: rotate(15deg) scale(1.1);
}

.cta-button {
  padding: 0.5rem 1.25rem;
  font-weight: 600;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  color: white;
  border-radius: var(--radius-full);
  transition: transform var(--transition), box-shadow var(--transition);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--primary);
  z-index: 60;
}

.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 70%;
  max-width: 300px;
  height: 100vh;
  background: var(--card-bg);
  box-shadow: var(--shadow-lg);
  z-index: 55;
  padding: 5rem 2rem 2rem;
  transition: right var(--transition);
}

.mobile-menu.active {
  right: 0;
}

.mobile-menu .nav-link {
  display: block;
  margin: 1.5rem 0;
  font-size: 1.1rem;
}

.backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 50;
  backdrop-filter: blur(2px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  margin-top: 0;
  display: flex;
  align-items: center;
  background: linear-gradient(to right, rgba(79, 70, 229, 0.1), rgba(236, 72, 153, 0.1));
  padding: 0 1rem;
  overflow: hidden;
}

.blob-container {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.blob-svg {
  position: absolute;
  top: -20%;
  left: -20%;
  width: 140%;
  height: 140%;
  opacity: 0.2;
  z-index: 1;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  25% { transform: translate(-20px, 20px) rotate(2deg); }
  50% { transform: translate(10px, -15px) rotate(-2deg); }
  75% { transform: translate(15px, 10px) rotate(1deg); }
}

@keyframes morph {
  0%, 100% { d: path("M421.5,304Q389,358,334.5,393.5Q280,429,225,397.5Q170,366,121,321Q72,276,88.5,210Q105,144,162,108Q219,72,278,84.5Q337,97,377.5,142Q418,187,421.5,304Z"); }
  33% { d: path("M419,307Q380,364,323,390Q266,416,214,390Q162,364,113,322Q64,280,88,209.5Q112,139,168,97.5Q224,56,277.5,89Q331,122,378,161Q425,200,419,307Z"); }
  66% { d: path("M420,301Q383,352,329,389Q275,426,216.5,401Q158,376,106.5,339Q55,302,80.5,226Q106,150,164.5,109Q223,68,281,98.5Q339,129,379.5,173Q420,217,420,301Z"); }
}

.blob-svg path {
  animation: morph 20s infinite alternate ease-in-out;
}

.blob-svg {
  animation: float 30s infinite ease-in-out;
}

.hero-content {
  position: relative;
  z-index: 10;
  max-width: 600px;
  margin-left: 2rem;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  color: var(--text-muted);
}

.typed-container {
  display: inline-block;
  position: relative;
}

.typed-text {
  border-right: 0.05px solid var(--primary);
  white-space: nowrap;
  overflow: visible;
  display: inline-block;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

@keyframes typing {
  from { width: 0 }
  to { width: 100% }
}

@keyframes blink {
  50% { border-color: transparent }
}

.feature-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.badge {
  background: rgba(79, 70, 229, 0.1);
  color: var(--primary);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: transform var(--transition), background var(--transition);
}

.badge:hover {
  transform: translateY(-2px);
  background: rgba(79, 70, 229, 0.2);
}

.badge i {
  font-size: 1rem;
}

.badge.ai-badge {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(236, 72, 153, 0.1));
  border: 1px solid rgba(79, 70, 229, 0.2);
}

.badge.ai-badge:hover {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.2), rgba(236, 72, 153, 0.2));
  transform: translateY(-2px) scale(1.05);
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.primary-btn {
  padding: 0.875rem 1.75rem;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  color: white;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: transform var(--transition), box-shadow var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.primary-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px -5px rgba(79, 70, 229, 0.5);
}

.primary-btn i {
  font-size: 1.1rem;
}

.secondary-btn {
  padding: 0.875rem 1.75rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(79, 70, 229, 0.3);
  color: var(--text-dark);
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.secondary-btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  background: rgba(255, 255, 255, 0.2);
}

.secondary-btn i {
  font-size: 1.1rem;
}

.dark-mode .secondary-btn {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid rgba(129, 140, 248, 0.3);
  color: var(--text-light);
}

.dark-mode .secondary-btn:hover {
  background: rgba(30, 41, 59, 0.8);
}

.hero-image {
  position: relative;
  z-index: 10;
  max-width: 16%;
  margin-left: auto;
  margin-right: 2rem;
  animation: float 6s infinite ease-in-out;
}

.hero-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.rate-display {
  position: relative;
  z-index: 10;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
  max-width: 450px;
  margin: 3rem auto 0;
  border: 1px solid rgba(129, 140, 248, 0.2);
}

.live-rate {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

.live-rate-title {
  font-weight: 600;
  color: var(--text-muted);
  margin-right: auto;
}

.live-rate-value {
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.live-rate-value i {
  color: var(--tertiary);
}

.rate-chart {
  height: 80px;
  width: 100%;
  margin-top: 1rem;
}

/* How It Works Section */
.section {
  padding: 6rem 1rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 1rem;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 1.125rem;
  margin-bottom: 4rem;
}

.steps-container {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 4rem;
}

.step-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow-md);
  flex: 1;
  max-width: 280px;
  border: 1px solid rgba(129, 140, 248, 0.1);
  transition: transform var(--transition), box-shadow var(--transition);
}

.step-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.step-icon {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  position: relative;
}

.step-icon::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  padding: 2px;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

.step-number {
  position: absolute;
  top: -5px;
  right: -5px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-dark);
}

.step-description {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Calculator Section */
.calculator-section {
  background: linear-gradient(to right, rgba(79, 70, 229, 0.05), rgba(236, 72, 153, 0.05));
  padding: 6rem 1rem;
}

.calculator-container {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
  max-width: 960px;
  margin: 0 auto;
}

.calculator-form {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 2rem;
  width: 340px;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(129, 140, 248, 0.1);
  transition: transform var(--transition), box-shadow var(--transition);
}

.calculator-form:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.calculator-form .form-control {
  font-size: 16px;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(129, 140, 248, 0.2);
  border-radius: var(--radius-md);
  background: var(--card-bg);
  color: var(--text-dark);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(129, 140, 248, 0.2);
}

.calculator-result {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 2rem;
  width: 340px;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(129, 140, 248, 0.1);
  transition: transform var(--transition), box-shadow var(--transition);
}

.calculator-result:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.result-item {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(129, 140, 248, 0.1);
}

.result-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.result-label {
  font-weight: 500;
  color: var(--text-muted);
}

.result-value {
  font-weight: 700;
  color: var(--text-dark);
}

.highlight {
  color: var(--primary);
  font-weight: 700;
  font-size: 1.1rem;
}

.savings-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  margin-left: 0.5rem;
}

/* Network Section */
.network-section {
  padding: 6rem 1rem;
  position: relative;
  overflow: hidden;
}

.network-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 2rem;
  max-width: 960px;
  margin: 0 auto;
}

.network-stat-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(129, 140, 248, 0.1);
  transition: transform var(--transition), box-shadow var(--transition);
}

.network-stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.stat-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  color: var(--text-muted);
  font-size: 1rem;
}

.world-map {
  max-width: 960px;
  margin: 4rem auto 0;
  height: 400px;
  position: relative;
  background: url('https://cdn.pixabay.com/photo/2013/07/12/12/54/world-map-146505_1280.png') center/contain no-repeat;
  opacity: 0.7;
}

.map-point {
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  transform: translate(-50%, -50%);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

.map-point::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: rgba(79, 70, 229, 0.3);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 1; }
  100% { transform: scale(2); opacity: 0; }
}

.map-point:hover {
  transform: translate(-50%, -50%) scale(1.5);
  box-shadow: 0 0 15px rgba(79, 70, 229, 0.8);
}

.map-popup {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 0.5rem 1rem;
  box-shadow: var(--shadow-md);
  white-space: nowrap;
  font-size: 0.8rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), transform var(--transition);
  pointer-events: none;
  border: 1px solid rgba(129, 140, 248, 0.2);
  z-index: 20;
}

.map-point:hover .map-popup {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(-5px);
}

/* FAQ Section */
.faq-section {
  padding: 6rem 1rem;
  background: linear-gradient(to right, rgba(79, 70, 229, 0.05), rgba(236, 72, 153, 0.05));
}

.faq-container {
  max-width: 760px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 1.5rem;
}

.faq-question {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(129, 140, 248, 0.1);
  transition: box-shadow var(--transition);
}

.faq-question:hover {
  box-shadow: var(--shadow-lg);
}

.question-text {
  font-weight: 600;
  color: var(--text-dark);
}

.toggle-icon {
  font-size: 1.25rem;
  color: var(--primary);
  transition: transform var(--transition);
}

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

.faq-answer {
  background: var(--card-bg);
  margin-top: 0.5rem;
  border-radius: var(--radius-lg);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height var(--transition), opacity var(--transition), margin var(--transition);
}

.faq-item.active .faq-answer {
  max-height: 1000px;
  opacity: 1;
  margin-top: 1rem;
}

.answer-text {
  padding: 1.5rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Trust Bar */
.trust-bar {
  background: linear-gradient(to right, var(--primary), var(--secondary));
  color: white;
  padding: 1rem;
  text-align: center;
  font-weight: 500;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
}

.trust-bar i {
  font-size: 1.25rem;
}

/* Web3 Features Section */
.web3-features {
  padding: 6rem 1rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 960px;
  margin: 0 auto;
}

.feature-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(129, 140, 248, 0.1);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(to right, rgba(79, 70, 229, 0.1), rgba(236, 72, 153, 0.1));
  transform: rotate(45deg);
  z-index: 0;
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

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

.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(to right, rgba(79, 70, 229, 0.1), rgba(236, 72, 153, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-dark);
  position: relative;
  z-index: 1;
}

.feature-description {
  color: var(--text-muted);
  line-height: 1.6;
  flex: 1;
  position: relative;
  z-index: 1;
}

/* AI Features Section */
.ai-features {
  padding: 6rem 1rem;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.05), rgba(236, 72, 153, 0.05));
}

.ai-highlight {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(236, 72, 153, 0.1));
  border: 1px solid rgba(79, 70, 229, 0.2);
  position: relative;
  overflow: hidden;
}

.ai-highlight::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: ai-shine 3s infinite;
  pointer-events: none;
}

@keyframes ai-shine {
  0% { left: -100%; }
  100% { left: 100%; }
}

.ai-badge-glow {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 0 20px rgba(79, 70, 229, 0.3);
  animation: ai-glow 2s infinite alternate;
}

@keyframes ai-glow {
  0% { box-shadow: 0 0 20px rgba(79, 70, 229, 0.3); }
  100% { box-shadow: 0 0 30px rgba(236, 72, 153, 0.4); }
}

/* Footer */
footer {
  background: var(--card-bg);
  padding: 4rem 1rem 2rem;
  border-top: 1px solid rgba(129, 140, 248, 0.1);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  max-width: 960px;
  margin: 0 auto 3rem;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
}

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

.social-links {
  display: flex;
  gap: 1rem;
}

.social-link {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(79, 70, 229, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  transition: transform var(--transition), background var(--transition);
}

.social-link:hover {
  transform: translateY(-3px);
  background: rgba(79, 70, 229, 0.2);
}

.footer-column h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text-dark);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  color: var(--text-muted);
  transition: color var(--transition), transform var(--transition);
  display: inline-block;
}

.footer-link:hover {
  color: var(--primary);
  transform: translateX(3px);
}

.copyright {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(129, 140, 248, 0.1);
  max-width: 960px;
  margin: 0 auto;
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
  box-shadow: var(--shadow-md);
  z-index: 40;
}

.back-to-top.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

/* Animated Chart */
.chart-container {
  position: relative;
  width: 100%;
  height: 100%;
}

.chart-line {
  fill: none;
  stroke: url(#chartGradient);
  stroke-width: 3;
  stroke-linecap: round;
}

.chart-area {
  fill: url(#areaGradient);
  opacity: 0.2;
}

.chart-dot {
  fill: var(--primary);
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 1rem;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  z-index: 100;
  border: 1px solid rgba(129, 140, 248, 0.2);
}

.toast.active {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  visibility: visible;
}

.toast-icon {
  color: var(--tertiary);
  font-size: 1.25rem;
}

.toast-message {
  font-weight: 500;
}

.toast-close {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition);
}

.toast-close:hover {
  color: var(--text-dark);
}

/* Media Queries */
@media (max-width: 1200px) {
  .hero-content {
    max-width: 500px;
  }

  .hero h1 {
    font-size: 3rem;
  }
}

@media (max-width: 992px) {
  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: block;
  }

  .hero {
    flex-direction: column;
    text-align: center;
    padding-top: 5rem;
  }

  .hero-content {
    margin: 0 auto;
    max-width: 600px;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-image {
    margin: 3rem auto 0;
    max-width: 60%;
  }

  .feature-badges {
    justify-content: center;
  }

  .steps-container {
    flex-direction: column;
    align-items: center;
  }

  .step-card {
    max-width: 320px;
    width: 100%;
  }
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }

  .hero p {
    font-size: 1.1rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .calculator-container {
    flex-direction: column;
    align-items: center;
  }

  .calculator-form,
  .calculator-result {
    width: 100%;
    max-width: 400px;
  }

  .network-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }

  .world-map {
    height: 300px;
  }
}

@media (max-width: 576px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero-buttons {
    flex-direction: column;
    gap: 1rem;
  }

  .feature-badges {
    justify-content: center;
  }

  .hero-image {
    max-width: 80%;
  }

  .section {
    padding: 4rem 1rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .back-to-top {
    bottom: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
  }
}