body {
  font-family: Arial;
  margin: 0;
  background: #f5f5f5;
}

/* Header */
header {
  background: #ff4d4d;
  padding: 15px;
  display: flex;
  gap: 10px;
}

header input {
  flex: 1;
  padding: 10px;
}

header button {
  padding: 10px 20px;
  background: white;
  border: none;
  cursor: pointer;
}

/* Categories */
.categories {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 20px;
  gap: 10px;
}

.card {
  background: white;
  padding: 20px;
  text-align: center;
  border-radius: 10px;
}

/* Listings */
.listings {
  padding: 20px;
}

.item {
  background: white;
  margin-bottom: 10px;
  padding: 15px;
  border-radius: 10px;
}