:root {
  --primary: #3b7af0;
  --primary-dark: #2f65f6;
  --orange: #ff8f00;
  --green: #00b578;
  --text: #222;
  --text-light: #888;
  --bg: #f5f6f8;
  --white: #ffffff;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.nav-links {
  display: flex;
  gap: 30px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  transition: color 0.3s;
}

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

.hero {
  padding: 150px 0 100px;
  background: linear-gradient(135deg, #f8f9ff 0%, #e8f0fe 100%);
  text-align: center;
}

.hero h1 {
  font-size: 56px;
  font-weight: 800;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--text), var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 20px;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto 40px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 30px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 10px 30px rgba(59, 122, 240, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(59, 122, 240, 0.4);
}

.btn-secondary {
  background: white;
  color: var(--text);
  border: 2px solid #e0e0e0;
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.features {
  padding: 100px 0;
}

.section-title {
  text-align: center;
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 15px;
}

.section-subtitle {
  text-align: center;
  font-size: 18px;
  color: var(--text-light);
  margin-bottom: 60px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.feature-card {
  background: white;
  padding: 40px 30px;
  border-radius: 20px;
  text-align: center;
  transition: all 0.3s;
  border: 1px solid #f0f0f0;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 25px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  color: white;
}

.feature-card h3 {
  font-size: 22px;
  margin-bottom: 15px;
}

.feature-card p {
  color: var(--text-light);
  line-height: 1.6;
}

.preview {
  padding: 100px 0;
  background: var(--bg);
}

.preview-container {
  display: flex;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
  margin-top: 60px;
}

.phone-frame {
  width: 280px;
  height: 560px;
  background: white;
  border-radius: 40px;
  padding: 15px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  position: relative;
  overflow: hidden;
}

.phone-frame::before {
  content: '';
  position: absolute;
  top: 15px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 25px;
  background: #000;
  border-radius: 0 0 15px 15px;
  z-index: 10;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--bg);
  border-radius: 25px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.phone-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  font-size: 14px;
  text-align: center;
  padding: 20px;
}

.phone-placeholder .icon {
  font-size: 48px;
  margin-bottom: 15px;
}

.download {
  padding: 100px 0;
  text-align: center;
}

.download-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 40px;
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 15px;
  padding: 20px 40px;
  background: #000;
  color: white;
  border-radius: 15px;
  text-decoration: none;
  transition: all 0.3s;
}

.store-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}

.store-btn .icon {
  font-size: 36px;
}

.store-btn .text {
  text-align: left;
}

.store-btn .text small {
  display: block;
  font-size: 12px;
  opacity: 0.8;
}

.store-btn .text strong {
  display: block;
  font-size: 20px;
}

footer {
  background: #1a1a2e;
  color: white;
  padding: 60px 0 30px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-section h3 {
  font-size: 18px;
  margin-bottom: 20px;
  color: var(--primary);
}

.footer-section p,
.footer-section a {
  color: #aaa;
  line-height: 2;
  text-decoration: none;
}

.footer-section a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid #333;
  color: #666;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 36px;
  }
  
  .hero p {
    font-size: 16px;
  }
  
  .section-title {
    font-size: 28px;
  }
  
  .phone-frame {
    width: 240px;
    height: 480px;
  }
  
  .nav-links {
    display: none;
  }
  
  .store-btn {
    padding: 15px 30px;
  }
}