@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: #1d1d1f;
  background-color: #ffffff;
  line-height: 1.6;
}

::selection {
  background-color: #6366f1;
  color: white;
}

.gradient-text {
  background: linear-gradient(135deg, #6366f1, #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-bg {
  background: linear-gradient(135deg, #6366f1, #a855f7);
}

.gradient-bg-subtle {
  background: linear-gradient(180deg, #f5f3ff 0%, #ffffff 100%);
}

.card-hover {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(99, 102, 241, 0.1);
}

.feature-card {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(99, 102, 241, 0.12);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 9999px;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary:hover {
  transform: scale(1.02);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 9999px;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.3s ease;
  border: 2px solid #1d1d1f;
  cursor: pointer;
  text-decoration: none;
  color: #1d1d1f;
}

.btn-secondary:hover {
  background-color: #1d1d1f;
  color: white;
  transform: scale(1.02);
}

.app-icon-glow {
  box-shadow: 0 0 60px rgba(99, 102, 241, 0.15);
}

.animate-fade-in {
  opacity: 0;
  animation: fadeIn 0.8s ease forwards;
}

.animate-fade-in-up {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease forwards;
}

.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }

@keyframes fadeIn {
  to { opacity: 1; }
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.faq-question {
  cursor: pointer;
  user-select: none;
}

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

.faq-answer.open {
  max-height: 300px;
  opacity: 1;
}

.faq-toggle {
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

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

.nav-link {
  position: relative;
  text-decoration: none;
  color: #6b7280;
  transition: color 0.2s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(135deg, #6366f1, #a855f7);
  transition: width 0.3s ease;
}

.nav-link:hover {
  color: #1d1d1f;
}

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

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}

@media (min-width: 768px) {
  .screenshot-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.screenshot-shadow {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.screenshot-shadow:hover {
  transform: scale(1.03);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
}

.youtube-embed {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  border-radius: 16px;
  overflow: hidden;
}

.youtube-embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.section-divider {
  width: 80px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(135deg, #6366f1, #a855f7);
  margin: 0 auto;
}

.footer-link {
  color: #9ca3af;
  text-decoration: none;
  transition: color 0.2s ease;
  font-size: 14px;
}

.footer-link:hover {
  color: #6366f1;
}

@media (max-width: 640px) {
  h1 { font-size: 2.25rem !important; line-height: 1.2 !important; }
  h2 { font-size: 1.75rem !important; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .hero-buttons a { width: 100%; max-width: 320px; }
}