:root {
  --primary-color: #2563eb;
  --secondary-color: #1e40af;
  --bg-color: #f9fafb;
  --text-color: #111827;
}

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

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

/* Navbar */
.navbar {
  background: white;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

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

nav a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: color 0.3s;
}

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

/* Hero Section */
.hero {
  text-align: center;
  padding: 5rem 2rem;
  background: linear-gradient(
    to bottom right,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
}

.hero h2 {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

.hero p {
  max-width: 600px;
  margin: 0 auto 2rem;
}

.btn-primary {
  background: white;
  color: var(--primary-color);
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: bold;
  text-decoration: none;
  transition: background 0.3s;
}

.btn-primary:hover {
  background: #e0e7ff;
}

/* Features */
.features {
  padding: 4rem 2rem;
  text-align: center;
}

.features h3 {
  font-size: 1.8rem;
  margin-bottom: 2rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.card {
  background: white;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s;
}

.card:hover {
  transform: translateY(-5px);
}

.card img {
  width: 70px;
  margin-bottom: 1rem;
}

/* Download */
.download {
  text-align: center;
  padding: 4rem 2rem;
  background: var(--primary-color);
  color: white;
}

.btn-secondary {
  display: inline-block;
  background: white;
  color: var(--primary-color);
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
}

.btn-secondary:hover {
  background: #e0e7ff;
}

/* Footer */
.footer {
  background: #111827;
  color: #d1d5db;
  text-align: center;
  padding: 2rem;
}

.footer strong {
  color: #93c5fd;
}