body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(to bottom, #f3f4f6, #fff);
  color: #1f2937;
}

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

.header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  border-bottom: 1px solid #d1d5db;
}

.header h1 {
  font-size: 1.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

nav {
  display: flex;
  gap: 1rem;
}

nav a {
  text-decoration: none;
  color: #2563eb;
  font-weight: 500;
}

nav .cta {
  background-color: #2563eb;
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 999px;
}

.icon {
  width: 2rem;
  height: 2rem;
}

.intro, .about, .signup {
  text-align: center;
  padding: 3rem 1rem;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  padding: 3rem 1rem;
}

.features div {
  background: white;
  padding: 1.5rem;
  border-radius: 0.5rem;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

form {
  margin-top: 1rem;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

input[type="email"] {
  padding: 0.75rem;
  border: 1px solid #d1d5db;
  border-radius: 0.5rem;
  width: 250px;
}

button {
  background-color: #2563eb;
  color: white;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
}

footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.875rem;
  color: #6b7280;
}