/* Reset và font mặc định */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Montserrat', 'Arial', 'Helvetica', sans-serif;
    font-weight: 700;
  }
  
  body {
    background: url('img/bg3.png') no-repeat center center fixed;
    background-size: cover;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .background-overlay {
    width: 100%;
    min-height: 100vh;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px;
  }
  
  .icon-container {
    width: 900%;
    max-width: 1500px;
    max-height: 700px;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    overflow-y: auto; /* Cho phép cuộn nếu vượt quá chiều cao */
  }
  
  .icon-container h1 {
    margin-bottom: 20px;
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: #333;
    text-align: center;
  }
  
  /* Grid chính */
  .icon-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr)); /* 5 cột trên mọi kích thước mà n hình */
    grid-template-rows: repeat(4, minmax(0, 1fr)); /* 4 hà ng */
    gap: 15px;
    width: 100%;
    min-height: 0; /* Đảm bảo lưới không vượt quá container */
  }
  
  /* Má»—i icon item */
  .icon-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 5px;
    min-height: 0; /* Đảm bảo ô không vượt quá giới hạn */
  }
  
  .icon-item img {
    width: 48px; /* Kích thước cố định */
    height: 48px;
    object-fit: contain;
    transition: transform 0.3s ease;
  }
  
  .icon-item p {
    font-size: clamp(0.5rem, 1.2vw, 0.8rem);
    color: #444;
    margin-top: 5px;
    text-align: center;
    text-transform: uppercase;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  
  /* Hiệu ứng khi hover */
  .icon-item img:hover {
    transform: scale(1.1);
  }
  
  /* Animation Definitions */
  @keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
  }
  
  @keyframes move {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(10px); }
  }
  
  /* Apply animations to icons */
  .icon-item {
    animation: pulse 8s infinite, move 9s infinite;
  }
  
  /* Staggered delays for each icon */
  .icon-item:nth-child(1) { animation-delay: 0s, 0s; }
  .icon-item:nth-child(2) { animation-delay: 0.1s, 0.2s; }
  .icon-item:nth-child(3) { animation-delay: 0.2s, 0.4s; }
  .icon-item:nth-child(4) { animation-delay: 0.3s, 0.6s; }
  .icon-item:nth-child(5) { animation-delay: 0.4s, 0.8s; }
  .icon-item:nth-child(6) { animation-delay: 0.5s, 1s; }
  .icon-item:nth-child(7) { animation-delay: 0.6s, 1.2s; }
  .icon-item:nth-child(8) { animation-delay: 0.7s, 1.4s; }
  .icon-item:nth-child(9) { animation-delay: 0.8s, 1.6s; }
  .icon-item:nth-child(10) { animation-delay: 0.9s, 1.8s; }
  .icon-item:nth-child(11) { animation-delay: 1s, 2s; }
  .icon-item:nth-child(12) { animation-delay: 1.1s, 2.2s; }
  .icon-item:nth-child(13) { animation-delay: 1.2s, 2.4s; }
  .icon-item:nth-child(14) { animation-delay: 1.3s, 2.6s; }
  .icon-item:nth-child(15) { animation-delay: 1.4s, 2.8s; }
  .icon-item:nth-child(16) { animation-delay: 1.5s, 3s; }
  .icon-item:nth-child(17) { animation-delay: 1.6s, 3.2s; }
  .icon-item:nth-child(18) { animation-delay: 1.7s, 3.4s; }
  .icon-item:nth-child(19) { animation-delay: 1.8s, 3.6s; }
  .icon-item:nth-child(20) { animation-delay: 1.9s, 3.8s; }