* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: #0f172a;
  color: #e5e7eb;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 20px;
}

.hero {
  text-align: center;
  margin-bottom: 80px;
}

h1 {
  font-size: 42px;
  line-height: 1.2;
  margin-bottom: 16px;
}

.subtitle {
  font-size: 18px;
  color: #cbd5f5;
  margin-bottom: 32px;
}

.benefits {
  list-style: none;
  padding: 0;
  margin-bottom: 32px;
}

.benefits li {
  margin-bottom: 8px;
}

.form {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

input[type="email"] {
  padding: 14px;
  font-size: 16px;
  border-radius: 6px;
  border: none;
  width: 345px;
}

button {
  padding: 14px 24px;
  font-size: 16px;
  background: #6366f1;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background: #4f46e5;
}

.note {
  margin-top: 12px;
  font-size: 14px;
  color: #9ca3af;
}

section {
  margin-bottom: 64px;
}

h2 {
  font-size: 28px;
  margin-bottom: 16px;
  text-align: center;
}

ol, ul {
  text-align: left;
  max-width: 500px;
  margin: 0 auto;
}

.footer {
  text-align: center;
  font-size: 14px;
  color: #9ca3af;
}

.popup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.popup {
  background: #020617;
  padding: 32px;
  border-radius: 12px;
  max-width: 360px;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.popup h3 {
  margin-top: 0;
  margin-bottom: 12px;
}

.popup p {
  color: #cbd5f5;
  margin-bottom: 24px;
}

.popup button {
  background: #6366f1;
  border: none;
  padding: 12px 20px;
  border-radius: 6px;
  cursor: pointer;
  color: white;
}

.hidden {
  display: none;
}

.example {
  max-width: 400px;
  margin: 24px auto;
  display: block;
  border-radius: 8px;
}