* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  background-color: #1260b7; /* nền xanh */
  display: flex;
  justify-content: center;
  padding: 1rem;
}

/* Main container */
.main {
  width: 100%;
  display: flex;
  justify-content: center;
}

.main__container {
  width: 100%;
  max-width: 700px; /* tăng chiều ngang cho PC */
}

.main__image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  object-fit: contain;
}

/* Scroll mượt */
html {
  scroll-behavior: smooth;
}

/* Responsive cho mobile */
@media (max-width: 500px) {
  .main__container {
    max-width: 100%; /* mobile full width */
    padding: 0;
  }
}