* {
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  margin: 0;
  background-color: #f4f6f8;
  color: #222;
}

.header {
  background-color: #111;
  color: white;
  padding: 20px;
  text-align: center;
}

.container {
  max-width: 900px;
  margin: 20px auto;
  padding: 0 15px;
}

.card {
  background: white;
  padding: 20px;
  margin-bottom: 20px;
  border-radius: 6px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

h2 {
  margin-top: 0;
}

input {
  width: 100%;
  padding: 10px;
  margin-bottom: 10px;
}

button {
  padding: 10px;
  width: 100%;
  background-color: #0070f3;
  border: none;
  color: white;
  font-size: 16px;
  cursor: pointer;
}

button:hover {
  background-color: #0059c1;
}

.footer {
  text-align: center;
  padding: 15px;
  background-color: #ddd;
}