:root {
  --bg: #0b0f14;
  --bg-alt: #121826;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --primary: #1da1f2;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}

a {
  color: var(--primary);
  text-decoration: none;
}

.header {
  border-bottom: 1px solid #1f2937;
}

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

.logo {
  height: 42px;
}

.container {
  max-width: 1100px;
  margin: auto;
  padding: 2rem 1rem;
}

.hero {
  padding: 6rem 0;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
}

.btn {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.8rem 1.4rem;
  border-radius: 6px;
  background: var(--primary);
  color: black;
  font-weight: 600;
}

.section {
  padding: 4rem 0;
}

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

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.card {
  background: #0f172a;
  padding: 1.5rem;
  border-radius: 8px;
  border: 1px solid #1f2937;
}

.footer {
  border-top: 1px solid #1f2937;
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
}