body {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #fff;
  color: #111;
  line-height: 1.6;
}

main {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px;
}

h1, h2 {
  font-weight: 600;
}

h1 { font-size: 2em; margin-bottom: 10px; }
h2 { margin-top: 40px; margin-bottom: 10px; font-size: 1.5em; }

p, li { margin-bottom: 15px; }
ul { padding-left: 20px; }

.accordion button {
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  padding: 15px 0;
  font-size: 1em;
  font-weight: 500;
  cursor: pointer;
  outline: none;
  border-bottom: 1px solid #eee;
}

.accordion button:hover { color: #0073e6; }

.panel { display: none; padding: 0 0 15px 0; }

footer {
  margin-top: 50px;
  padding-top: 20px;
  border-top: 1px solid #eee;
  font-size: 0.9em;
}

input, select, textarea {
  width: 100%;
  padding: 10px;
  margin-bottom: 15px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 1em;
  box-sizing: border-box;
}

form button {
  width: 100%;
  padding: 15px;
  background-color: #111;
  color: #fff;
  font-size: 1em;
  font-weight: 600;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  box-sizing: border-box;
}

form button:hover {
  background-color: #0073e6;
}