body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #111;
  color: #fff;
  margin: 0;
  padding: 0;
  text-align: center;
}

header, footer {
  background-color: #000;
  color: #fff;
  padding: 1rem;
}

h1, h2 {
  color: #00ffe5;
  margin-bottom: 1rem;
}

button {
  padding: 12px 24px;
  background-color: #00ffe5;
  color: #000;
  border: none;
  border-radius: 10px;
  font-weight: bold;
  cursor: pointer;
  margin: 8px;
  transition: background 0.3s;
}

button:hover {
  background-color: #00bfae;
}

.product-item {
  background: #1a1a1a;
  border: 1px solid #00ffe5;
  border-radius: 10px;
  padding: 20px;
  margin: 15px auto;
  width: 80%;
  max-width: 400px;
  box-shadow: 0 0 20px #00ffe5aa;
}

.category-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  margin: 20px 0;
}

.category-buttons button {
  margin: 8px;
}

input, textarea {
  padding: 12px;
  width: 90%;
  max-width: 400px;
  border: 2px solid #00ffe5;
  border-radius: 8px;
  margin: 10px 0;
  background-color: #222;
  color: #fff;
}

a {
  color: #00ffe5;
  text-decoration: none;
}