:root {
  --primary-color: #4f46e5;
  --text-color: #1f2937;
  --bg-color: #ffffff;
  --secondary-bg: #f3f4f6;
  --card-bg: #ffffff;
  --border-color: #e5e7eb;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
}

header {
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border-color);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
}

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

.language-selector select {
  padding: 0.5rem;
  border-radius: 0.375rem;
  border: 1px solid var(--border-color);
  background-color: var(--card-bg);
  color: var(--text-color);
}

.theme-toggle {
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--text-color);
  border-radius: 0.375rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s;
}

.theme-toggle:hover {
  background-color: var(--secondary-bg);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

[data-theme="dark"] .sun-icon {
  display: none;
}

[data-theme="light"] .moon-icon {
  display: none;
}

.sun-icon,
.moon-icon {
  stroke: var(--text-color);
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  margin-bottom: 4rem;
}

.hero-content {
  padding-right: 2rem;
}

h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.subtitle {
  font-size: 1.25rem;
  color: var(--text-color);
  opacity: 0.9;
  margin-bottom: 2rem;
}

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

button {
  padding: 0.75rem 1.5rem;
  border-radius: 0.375rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s;
}

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

.primary-btn {
  background-color: var(--primary-color);
  color: white;
  border: none;
}

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

.demo-container {
  width: 100%;
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.demo-gif {
  width: 100%;
  height: auto;
  display: block;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 4rem;
}

.feature-card {
  background-color: var(--card-bg);
  padding: 2rem;
  border-radius: 1rem;
  border: 1px solid var(--border-color);
  transition: transform 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
}

.feature-card h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border-color);
  margin-top: 4rem;
}

@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero-content {
    padding-right: 0;
  }

  .features {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 2.5rem;
  }
}