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

:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-light: #818cf8;
  --secondary: #10b981;
  --dark: #0f172a;
  --gray: #475569;
  --light: #f8fafc;
  --border-radius: 2rem;
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --transition: all 0.3s ease;
}

body {
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  color: var(--dark);
  background-color: #ffffff;
  overflow-x: hidden;
}

.container {
  width: 90%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

h2::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  margin: 1rem auto 0;
  border-radius: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: 9999px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-ios {
  background: #000;
  color: white;
}

.btn-ios:hover {
  background: #1a1a1a;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-android {
  background: #3ddc84;
  color: #000;
}

.btn-android:hover {
  background: #2bb673;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-outline {
  border: 2px solid var(--primary);
  color: var(--primary);
  background: transparent;
}

.btn-outline:hover {
  background: var(--primary);
  color: white;
}

.header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark);
  text-decoration: none;
}

.logo img {
  width: 40px;
  height: 40px;
  border-radius: 12px;
}

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

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

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

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

.nav-buttons {
  display: flex;
  gap: 0.75rem;
}

.nav-buttons .btn {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
}

.menu-toggle {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--dark);
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    gap: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow);
    transform: translateY(-150%);
    transition: transform 0.3s ease;
    z-index: 99;
  }

  .nav-menu.active {
    transform: translateY(0);
  }

  .nav-links {
    flex-direction: column;
    align-items: center;
  }

  .nav-buttons {
    flex-direction: column;
    width: 100%;
  }

  .menu-toggle {
    display: block;
  }
}

.hero {
  padding: 5rem 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

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

.hero h1 {
  color: white;
  margin-bottom: 1.5rem;
}

.hero p {
  font-size: 1.25rem;
  color: rgba(255,255,255,0.9);
  margin-bottom: 2rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-image img {
  max-width: 100%;
  height: auto;
  border-radius: 2rem;
  box-shadow: var(--shadow-lg);
  transform: perspective(1000px) rotateY(-5deg);
  transition: var(--transition);
}

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

@media (max-width: 768px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-buttons {
    justify-content: center;
  }
  .hero-image {
    grid-row: 1;
  }
}

.features {
  padding: 6rem 0;
  background: var(--light);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
}

.feature-card {
  background: white;
  padding: 2.5rem 2rem;
  border-radius: 2rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2rem;
}

.feature-card h3 {
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.feature-card p {
  color: var(--gray);
}

.screenshots {
  padding: 6rem 0;
  background: white;
}

.screenshot-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  justify-items: center;
}

.screenshot {
  max-width: 220px;
  border-radius: 2rem;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.screenshot:hover {
  transform: scale(1.05);
}

.screenshot img {
  width: 100%;
  height: auto;
  display: block;
}

.about {
  padding: 6rem 0;
  background: var(--light);
  text-align: center;
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
}

.about p {
  font-size: 1.125rem;
  color: var(--gray);
  margin-bottom: 2rem;
}

.about-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  margin-top: 3rem;
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
}

.stat-label {
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.testimonials {
  padding: 6rem 0;
  background: white;
}

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

.testimonial-card {
  background: var(--light);
  padding: 2rem;
  border-radius: 2rem;
  box-shadow: var(--shadow-sm);
}

.testimonial-text {
  font-style: italic;
  margin-bottom: 1.5rem;
  color: var(--dark);
}

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

.author-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
}

.author-info h4 {
  font-size: 1.1rem;
}

.author-info p {
  color: var(--gray);
  font-size: 0.9rem;
}

.faq {
  padding: 6rem 0;
  background: var(--light);
}

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

details {
  background: white;
  border-radius: 1rem;
  margin-bottom: 1rem;
  padding: 1rem 1.5rem;
  cursor: pointer;
  transition: var(--transition);
}

details[open] {
  box-shadow: var(--shadow);
}

summary {
  font-weight: 600;
  font-size: 1.1rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: '\f078';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  transition: var(--transition);
}

details[open] summary::after {
  transform: rotate(180deg);
}

.faq-answer {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid #e2e8f0;
  color: var(--gray);
}

.contact {
  padding: 6rem 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  text-align: center;
}

.contact h2 {
  color: white;
}

.contact h2::after {
  background: white;
}

.contact p {
  max-width: 600px;
  margin: 0 auto 2rem;
  color: rgba(255,255,255,0.9);
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.contact-link {
  color: white;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.2rem;
  transition: var(--transition);
}

.contact-link:hover {
  transform: translateY(-3px);
}

.contact-link i {
  font-size: 1.5rem;
}

.footer {
  background: var(--dark);
  color: white;
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  gap: 2rem;
  align-items: center;
  margin-bottom: 3rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 1.5rem;
  font-weight: 700;
}

.footer-logo img {
  width: 50px;
  height: 50px;
  border-radius: 12px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  transition: var(--transition);
}

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

.footer-social {
  display: flex;
  justify-content: flex-end;
  gap: 1.5rem;
}

.footer-social a {
  color: white;
  font-size: 1.5rem;
  transition: var(--transition);
}

.footer-social a:hover {
  color: var(--primary-light);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }
  .footer-links {
    flex-direction: column;
    align-items: center;
  }
  .footer-social {
    justify-content: center;
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}