:root {
  --color-bg: #0b1f1a;
  --color-surface: #10281f;
  --color-primary: #2fbf71;
  --color-primary-dark: #1f8f52;
  --color-text: #eaf6f0;
  --color-text-muted: #a9c4b8;
}

* {
  box-sizing: border-box;
}

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

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.02em;
}

.logo span {
  color: var(--color-primary);
}

nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  margin-left: 1.5rem;
  font-size: 0.95rem;
}

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

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 5rem 2rem;
  text-align: center;
}

h1 {
  font-size: 2.75rem;
  margin-bottom: 1rem;
}

p.lead {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto 2.5rem;
}

.cta {
  display: inline-block;
  background: var(--color-primary);
  color: #05130d;
  font-weight: 600;
  padding: 0.85rem 1.75rem;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.15s ease;
}

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

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 4rem;
  text-align: left;
}

.card {
  background: var(--color-surface);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 1.5rem;
}

.card h3 {
  margin-top: 0;
  color: var(--color-primary);
}

footer {
  text-align: center;
  padding: 2rem;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}