* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}

body {
  background-color: #f7f7f7;
  color: #333;
}

.flash-sale {
  padding: 40px 20px;
  text-align: center;
}

.flash-sale h1 {
  font-size: 2rem;
  margin-bottom: 30px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  padding: 0 10px;
}

.product-card {
  background: #fff;
  padding: 20px;
  border-radius: 16px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  transition: transform 0.2s;
}

.product-card:hover {
  transform: translateY(-5px);
}

.product-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 12px;
}

.product-card h2 {
  margin: 15px 0 10px;
  font-size: 1.2rem;
}

.price {
  font-size: 1rem;
  margin-bottom: 10px;
}

.price .old {
  text-decoration: line-through;
  color: #aaa;
  margin-right: 8px;
}

.countdown {
  background-color: #ffd600;
  padding: 5px 10px;
  border-radius: 8px;
  font-weight: bold;
  display: inline-block;
  margin-bottom: 15px;
}

button {
  background-color: #000;
  color: white;
  padding: 10px 18px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s;
}

button:hover {
  background-color: #222;
}