:root {
  --bg-color: #1a1a1a;
  --card-bg: #242424;
  --text-color: #ffffff;
  --primary-color: #007bff;
  --primary-hover: #0056b3;
  --muted-text: #a0a0a0;
  --border-color: #333333;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 24px 16px;
}

.hero {
  text-align: center;
  margin-bottom: 48px;
}

.hero img {
  width: 100%;
  max-width: 600px;
  height: auto;
  border-radius: 12px;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 2.5rem;
  margin: 0 0 16px;
}

.hero p {
  font-size: 1.2rem;
  color: var(--muted-text);
  margin: 0 0 32px;
}

.btn {
  display: inline-block;
  background-color: var(--primary-color);
  color: #fff;
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.1rem;
  transition: background-color 0.2s;
}

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

.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 48px;
}

@media (min-width: 600px) {
  .features {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  border: 1px solid var(--border-color);
}

.card h3 {
  margin: 16px 0 8px;
}

.card p {
  color: var(--muted-text);
  margin: 0;
}

.nav {
  display: flex;
  justify-content: flex-end;
  padding: 16px;
  gap: 16px;
}

.nav a {
  color: var(--muted-text);
  text-decoration: none;
}

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

.lang-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
}

.footer {
  text-align: center;
  padding: 24px;
  border-top: 1px solid var(--border-color);
  margin-top: 48px;
  color: var(--muted-text);
}

.footer a {
  color: var(--primary-color);
  text-decoration: none;
  margin: 0 8px;
}

.footer a:hover {
  text-decoration: underline;
}

.page-content {
  background-color: var(--card-bg);
  padding: 32px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  margin-bottom: 48px;
}

.page-content h1 {
  margin-top: 0;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
}

.page-content h2 {
  margin-top: 32px;
}