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

body {
  margin: 0;
  background: #fff;
  color: #000;
}

a {
  color: #000;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

header {
  border-bottom: 2px solid #000;
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header h1 {
  margin: 0;
  font-size: 20px;
}

nav a {
  margin-left: 15px;
  font-weight: bold;
}

.container {
  max-width: 900px;
  margin: 30px auto;
  padding: 0 15px;
}

.box {
  border: 2px solid #000;
  padding: 20px;
  margin-bottom: 20px;
}

.box h2 {
  margin-top: 0;
}

input, select, textarea, button {
  width: 100%;
  padding: 10px;
  margin-top: 8px;
  margin-bottom: 15px;
  border: 2px solid #000;
  background: #fff;
  color: #000;
}

textarea {
  resize: vertical;
}

button {
  cursor: pointer;
  font-weight: bold;
}

button:hover {
  background: #000;
  color: #fff;
}

.list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 15px;
}

.item {
  border: 2px solid #000;
  padding: 15px;
}

.item h3 {
  margin-top: 0;
}

.price {
  font-weight: bold;
  margin: 10px 0;
}

.footer {
  text-align: center;
  padding: 20px;
  border-top: 2px solid #000;
  margin-top: 50px;
  font-size: 14px;
}