body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f7f7f7;
  color: #222;
}

main {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

h1 {
  font-size: 28px;
  margin-bottom: 5px;
}

p {
  line-height: 1.5;
}

a {
  text-decoration: none;
}

button {
  cursor: pointer;
  border: none;
}

button:hover {
  opacity: 0.9;
}

input {
  border: 1px solid #ccc;
  border-radius: 6px;
  padding: 10px;
  outline: none;
}

input:focus {
  border-color: #000;
}

/* small helper */
.center {
  text-align: center;
}