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

body {
  margin: 0;
  background: #f3f4f6;
}

header {
  display: flex;
  justify-content: space-between;
  padding: 16px 24px;
  background: #111827;
  color: white;
}

button {
  cursor: pointer;
  border: none;
  border-radius: 8px;
  padding: 10px 14px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  padding: 24px;
}

.card {
  background: white;
  padding: 16px;
  border-radius: 12px;
  box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.card button {
  background: #2563eb;
  color: white;
  width: 100%;
  margin-top: 10px;
}

/* CART */
#cart {
  position: fixed;
  top: 0;
  right: 0;
  width: 320px;
  height: 100vh;
  background: white;
  padding: 20px;
  box-shadow: -10px 0 20px rgba(0,0,0,0.2);
  overflow-y: auto;
}

.cart-item {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
}

.hidden {
  display: none;
}