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

body {
  margin: 0;
  background: #f7f7f7;
  color: #111;
}

header {
  padding: 15px 20px;
  border-bottom: 1px solid #ddd;
  background: #fff;
}

header a {
  text-decoration: none;
  font-weight: bold;
  color: #111;
}

.container {
  max-width: 600px;
  margin: 40px auto;
  background: #fff;
  padding: 20px;
  border-radius: 8px;
}

h1, h2 {
  margin-top: 0;
}

input, select, button {
  width: 100%;
  padding: 12px;
  margin-top: 10px;
  border-radius: 5px;
  border: 1px solid #ccc;
}

button {
  background: #111;
  color: #fff;
  border: none;
  cursor: pointer;
}

button:hover {
  opacity: 0.9;
}

.card {
  border: 1px solid #ddd;
  padding: 15px;
  border-radius: 6px;
  margin-top: 15px;
  background: #fafafa;
}

footer {
  text-align: center;
  margin: 40px 0;
  color: #777;
}