:root {
  --primary: #1f2933;
  --accent: #6366f1;
  --bg: #ffffff;
  --bg-alt: #f5f7fa;
  --text: #374151;
}

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

body {
  font-family: 'Poppins', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.container {
  width: 90%;
  max-width: 1100px;
  margin: auto;
}

.header {
  position: sticky;
  top: 0;
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
  z-index: 1000;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.logo {
  font-weight: 600;
  font-size: 1.2rem;
}

.nav a {
  margin-left: 1.5rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 400;
}

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

.menu-toggle {
  display: none;
  font-size: 1.5rem;
  background: none;
  border: none;
  cursor: pointer;
}

.hero {
  background: linear-gradient(135deg, #eef2ff, #ffffff);
  padding: 5rem 0;
  text-align: center;
}

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

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

.section {
  padding: 4rem 0;
}

.section.alt {
  background: var(--bg-alt);
}

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

.card {
  background: #fff;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 500;
}

.btn.secondary {
  background: #111827;
}

.footer {
  background: #111827;
  color: #9ca3af;
  text-align: center;
  padding: 1.5rem 0;
}

/* Responsive */
@media (max-width: 768px) {
  .nav {
    display: none;
    flex-direction: column;
    background: #fff;
    position: absolute;
    top: 70px;
    right: 5%;
    border: 1px solid #e5e7eb;
    padding: 1rem;
  }

  .nav.active {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }
}