:root {
  --bg: #111827;
  --fg: #f9fafb;
  --accent: #4f46e5;
  --accent-hover: #6366f1;
  --card-bg: #1f2937;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}

body {
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}

nav {
  background: #0f172a;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.logo {
  font-size: 1.4rem;
  font-weight: bold;
  color: var(--accent);
}

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

.nav-links li a {
  text-decoration: none;
  color: var(--fg);
  font-weight: 500;
  transition: color 0.2s;
}

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

header {
  text-align: center;
  padding: 4rem 2rem 2rem;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.download-section {
  padding: 3rem 2rem;
}

.download-section h2 {
  text-align: center;
  margin-bottom: 2rem;
  font-size: 2rem;
  color: var(--accent);
}

.download-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  max-width: 1000px;
  margin: auto;
}

.card {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

.card h3 {
  margin-bottom: 0.5rem;
}

.card .badge {
  background: var(--accent);
  color: white;
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  margin-left: 0.5rem;
  border-radius: 5px;
}

.card p {
  font-size: 0.9rem;
  margin-bottom: 1rem;
  color: #d1d5db;
}

.btn {
  text-decoration: none;
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  background: var(--accent);
  color: white;
  transition: background 0.2s;
}

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

footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.9rem;
  color: #6b7280;
}