*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: #333;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  background-color: #00ad9f;
  color: #fff;
  text-align: center;
  padding: 2rem 1rem;
}

.header h1 {
  font-size: 1.8rem;
}

.header p {
  margin-top: 0.5rem;
  font-size: 1rem;
  opacity: 0.9;
}

.main {
  flex: 1;
  max-width: 640px;
  width: 100%;
  margin: 2rem auto;
  padding: 0 1rem;
}

.section {
  margin-bottom: 2rem;
}

.section h2 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  border-bottom: 2px solid #00ad9f;
  padding-bottom: 0.25rem;
}

.section p {
  margin-bottom: 1rem;
}

.button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  color: #fff;
  background-color: #00ad9f;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.button:hover {
  background-color: #008f84;
}

.footer {
  background-color: #f5f5f5;
  text-align: center;
  padding: 1rem;
  font-size: 0.85rem;
  color: #777;
}