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

body {
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Header */
header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  padding: 1rem 5%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: #4c63d2;
  text-decoration: none;
  background: linear-gradient(135deg, #667eea, #764ba2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  font-family: 'Inter', sans-serif;
  letter-spacing: -0.5px;
}

.logo::after {
  content: '●';
  position: absolute;
  right: -10px;
  top: -5px;
  font-size: 0.5rem;
  color: #ff6b6b;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.2); }
}

nav {
  display: flex;
  gap: 2rem;
}

nav a {
  text-decoration: none;
  color: #374151;
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
}

nav a:hover {
  color: #4c63d2;
}

nav a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -5px;
  left: 0;
  background: #4c63d2;
  transition: width 0.3s ease;
}

nav a:hover::after {
  width: 100%;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 5% 2rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  max-width: 1200px;
  align-items: center;
}

.hero-content {
  color: white;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2.5rem;
  opacity: 0.9;
  line-height: 1.7;
}

.hero-image {
  text-align: center;
}

.hero-image img {
  width: 100%;
  max-width: 500px;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  transform: perspective(1000px) rotateY(-5deg) rotateX(2deg);
  transition: transform 0.3s ease;
}

.hero-image img:hover {
  transform: perspective(1000px) rotateY(0deg) rotateX(0deg) scale(1.02);
}

.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: linear-gradient(135deg, #ff6b6b, #ff8e8e);
  color: white;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 10px 30px rgba(255, 107, 107, 0.4);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(255, 107, 107, 0.6);
}

/* Features Section */
.features {
  padding: 6rem 5%;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.features-container {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.features h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: #2d3748;
  margin-bottom: 3rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 3rem;
  margin-top: 4rem;
}

.feature-card {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  border-radius: 20px;
  padding: 3rem 2rem;
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 2rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea, #764ba2);
}

.feature-icon img {
  width: 40px;
  height: 40px;
  filter: brightness(0) invert(1);
}

.feature-card h3 {
  font-size: 1.5rem;
  font-weight: 600;
  color: #2d3748;
  margin-bottom: 1rem;
}

.feature-card p {
  color: #718096;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.battery-indicators {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin-top: 1rem;
}

.battery-bar {
  width: 20px;
  height: 6px;
  background: #e2e8f0;
  border-radius: 3px;
  position: relative;
  overflow: hidden;
}

.battery-bar.active {
  background: linear-gradient(90deg, #10b981, #34d399);
  animation: batteryGlow 2s ease-in-out infinite alternate;
}

.battery-bar:nth-child(2).active {
  animation-delay: 0.2s;
}

.battery-bar:nth-child(3).active {
  animation-delay: 0.4s;
}

.battery-bar:nth-child(4).active {
  animation-delay: 0.6s;
}

.battery-bar:nth-child(5).active {
  animation-delay: 0.8s;
}

@keyframes batteryGlow {
  0% { opacity: 0.7; transform: scaleX(0.9); }
  100% { opacity: 1; transform: scaleX(1); }
}

/* Reviews Section */
.reviews {
  padding: 6rem 5%;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.reviews-container {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.reviews h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: #2d3748;
  margin-bottom: 3rem;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.review-card {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  border-radius: 20px;
  padding: 2.5rem 2rem;
  text-align: left;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.review-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.stars {
  margin-bottom: 1.5rem;
}

.star {
  color: #fbbf24;
  font-size: 1.2rem;
  margin-right: 2px;
}

.review-card p {
  color: #4a5568;
  line-height: 1.7;
  margin-bottom: 2rem;
  font-style: italic;
}

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

.reviewer img {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  object-fit: cover;
}

.reviewer-info h4 {
  color: #2d3748;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.reviewer-info span {
  color: #718096;
  font-size: 0.9rem;
}

/* FAQ Section */
.faq {
  padding: 6rem 5%;
  background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e0 100%);
}

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

.faq h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: #2d3748;
  text-align: center;
  margin-bottom: 3rem;
}

.faq-item {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  border-radius: 15px;
  margin-bottom: 1rem;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.faq-question {
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.faq-question:hover {
  background: rgba(102, 126, 234, 0.05);
}

.faq-question h3 {
  color: #2d3748;
  font-weight: 600;
  font-size: 1.1rem;
  margin: 0;
}

.faq-toggle {
  font-size: 1.5rem;
  color: #667eea;
  font-weight: bold;
  transition: transform 0.3s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 200px;
  padding: 0 2rem 1.5rem;
}

.faq-answer p {
  color: #4a5568;
  line-height: 1.6;
  margin: 0;
}

/* Pricing Section */
.pricing {
  padding: 6rem 5%;
  background: linear-gradient(135deg, #2d3748 0%, #4a5568 100%);
}

.pricing-container {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.pricing h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: white;
  margin-bottom: 3rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.pricing-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px);
  border-radius: 20px;
  padding: 3rem 2rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.pricing-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #667eea, #764ba2);
}

.pricing-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.pricing-card.popular {
  border: 2px solid #667eea;
  transform: scale(1.05);
}

.pricing-card.popular::after {
  content: 'Most Popular';
  position: absolute;
  top: 20px;
  right: -30px;
  background: #667eea;
  color: white;
  padding: 5px 40px;
  font-size: 0.8rem;
  font-weight: 600;
  transform: rotate(45deg);
}

.pricing-card h3 {
  font-size: 1.5rem;
  font-weight: 600;
  color: white;
  margin-bottom: 1rem;
}

.price {
  font-size: 3rem;
  font-weight: 700;
  color: #667eea;
  margin-bottom: 2rem;
}

.price span {
  font-size: 1rem;
  color: #a0aec0;
}

/* Footer */
footer {
  background: #1a202c;
  color: #a0aec0;
  text-align: center;
  padding: 3rem 5%;
  border-top: 1px solid #2d3748;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  nav {
    gap: 1rem;
  }

  .feature-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .pricing-card.popular {
    transform: none;
  }
}

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

.feature-card,
.pricing-card {
  animation: fadeInUp 0.8s ease forwards;
}