body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: #333;
  background: #f8f9f8;
}

.hero {
  background: url("images/himalaya.jpg") center/cover no-repeat;
  color: white;
  text-align: center;
  padding: 80px 20px;
  position: relative;
}

.hero::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.4); /* lớp phủ để chữ nổi bật */
}

.hero h1,
.hero p,
.hero .hero-buttons {
  position: relative;
  z-index: 1;
}

.hero h1 {
  margin: 0;
  font-size: 2.5em;
}

.hero p {
  margin-top: 10px;
  font-size: 1.2em;
}

.hero-buttons {
  margin-top: 20px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 15px;
}

.products {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 30px;
  padding: 40px 20px;
}

.product {
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  flex: 1 1 300px;
  max-width: 400px;
  text-align: center;
  padding: 20px;
}

.product img {
  max-width: 100%;
  border-radius: 12px;
  margin-bottom: 15px;
}

.product h2 {
  margin: 10px 0;
  color: #2c7a48;
}

.product ul {
  text-align: left;
  list-style: none;
  padding: 0;
  margin: 20px 0;
}

.product ul li {
  margin: 8px 0;
  font-size: 1em;
}

.cta {
  display: inline-block;
  padding: 12px 25px;
  background: #3fa46a;
  color: white;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  transition: background 0.3s ease;
}

.cta:hover {
  background: #2c7a48;
}

.cta.big {
  font-size: 1.2em;
  padding: 15px 35px;
}

.avantages {
  background: #eaf5ee;
  text-align: center;
  padding: 20px;
  font-weight: bold;
  color: #2c7a48;
}

footer {
  background: #2c7a48;
  color: white;
  text-align: center;
  padding: 15px;
  font-size: 0.9em;
}

/* Responsive */
@media (max-width: 768px) {
  .products {
    flex-direction: column;
    align-items: center;
  }

  .hero-buttons {
    flex-direction: column;
    gap: 10px;
  }

  .cta.big {
    width: 90%;
    text-align: center;
  }
}
.product-link {
  text-decoration: none;
  color: inherit;
  display: block;
}
.product-link:hover .product {
  box-shadow: 0 6px 15px rgba(0,0,0,0.2);
  transform: scale(1.02);
  transition: 0.3s;
}