body {
  margin: 0;
  padding: 0;
  font-family: system-ui, sans-serif;
  background: #f8fafc;
  color: #222;
  min-height: 100vh;
}

.container {
  max-width: 400px;
  margin: 8vh auto 0 auto;
  padding: 2rem 1.5rem;
  background: #fff;
  border-radius: 1.25rem;
  box-shadow: 0 4px 24px 0 rgba(0,0,0,0.07);
  text-align: center;
}

h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
  font-weight: 700;
  color: #1a202c;
}

.subheadline {
  font-size: 1.1rem;
  color: #4b5563;
  margin-bottom: 2rem;
  line-height: 1.5;
}

.cta-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.cta-form input[type="email"] {
  padding: 0.75rem 1rem;
  border: 1px solid #d1d5db;
  border-radius: 0.5rem;
  font-size: 1rem;
  outline: none;
  transition: border 0.2s;
}

.cta-form input[type="email"]:focus {
  border-color: #2563eb;
}

.cta-form button {
  padding: 0.75rem 1rem;
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.cta-form button:hover,
.cta-form button:focus {
  background: #1d4ed8;
}

@media (max-width: 500px) {
  .container {
    max-width: 95vw;
    padding: 1.5rem 0.5rem;
  }
  h1 {
    font-size: 1.3rem;
  }
  .subheadline {
    font-size: 1rem;
  }
}