/* Tổng quan */
    :root {
      --page-f8et-primary-color: #e21c3b; /* Màu đỏ thương hiệu e2bet */
      --page-f8et-secondary-color: #f7a32d; /* Màu vàng cam */
      --page-f8et-background-dark: #1a1a1a;
      --page-f8et-background-light: #2c2c2c;
      --page-f8et-text-color: #ffffff;
      --page-f8et-text-light-gray: #cccccc;
      --page-f8et-border-color: #444444;
      --page-f8et-gradient-start: #2a0000;
      --page-f8et-gradient-end: #000000;
      --page-f8et-button-hover: #ff4d6a;
    }

    .page-f8et {
      font-family: 'Arial', sans-serif;
      color: var(--page-f8et-text-color);
      background: linear-gradient(135deg, var(--page-f8et-gradient-start) 0%, var(--page-f8et-gradient-end) 100%);
      min-height: 100vh;
      line-height: 1.6;
      overflow-x: hidden;
    }

    .page-f8et-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
    }

    /* Tiêu đề */
    .page-f8et-hero {
      text-align: center;
      padding: 60px 20px;
      background-color: var(--page-f8et-background-dark);
      border-bottom: 5px solid var(--page-f8et-primary-color);
      margin-bottom: 30px;
      position: relative;
      overflow: hidden;
    }

    .page-f8et-hero::before {
      content: '';
      position: absolute;
      top: -50px;
      left: -50px;
      width: 200px;
      height: 200px;
      background: rgba(255, 255, 255, 0.05);
      transform: rotate(45deg);
      z-index: 0;
    }
    .page-f8et-hero::after {
      content: '';
      position: absolute;
      bottom: -50px;
      right: -50px;
      width: 200px;
      height: 200px;
      background: rgba(255, 255, 255, 0.05);
      transform: rotate(45deg);
      z-index: 0;
    }

    .page-f8et-hero h1 {
      font-size: 2.8em;
      color: var(--page-f8et-primary-color);
      margin-bottom: 15px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
      position: relative;
      z-index: 1;
    }

    .page-f8et-hero p {
      font-size: 1.2em;
      color: var(--page-f8et-text-light-gray);
      max-width: 800px;
      margin: 0 auto 30px;
      position: relative;
      z-index: 1;
    }

    .page-f8et-button {
      display: inline-block;
      background-color: var(--page-f8et-primary-color);
      color: var(--page-f8et-text-color);
      padding: 15px 30px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
      border: none;
      cursor: pointer;
    }

    .page-f8et-button:hover {
      background-color: var(--page-f8et-button-hover);
      transform: translateY(-2px);
    }

    /* Các phần nội dung */
    .page-f8et-section {
      background-color: var(--page-f8et-background-light);
      padding: 40px 20px;
      margin-bottom: 30px;
      border-radius: 10px;
      box-shadow: 0 5px 20px rgba(0, 0, 0, 0.5);
    }

    .page-f8et-section h2 {
      text-align: center;
      color: var(--page-f8et-secondary-color);
      font-size: 2em;
      margin-bottom: 30px;
      border-bottom: 2px solid var(--page-f8et-border-color);
      padding-bottom: 15px;
    }
    .page-f8et-section h3 {
        color: var(--page-f8et-primary-color);
        margin-top: 25px;
        margin-bottom: 15px;
        font-size: 1.5em;
    }

    .page-f8et-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      justify-content: center; /* Center the grid items */
    }

    .page-f8et-card {
      background-color: var(--page-f8et-background-dark);
      border-radius: 8px;
      padding: 20px;
      text-align: center;
      box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      border: 1px solid var(--page-f8et-border-color);
    }

    .page-f8et-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
    }

    .page-f8et-card img {
      max-width: 100%;
      height: 150px;
      object-fit: contain; /* Use contain to ensure full image is visible */
      border-radius: 5px;
      margin-bottom: 15px;
      border: 1px solid var(--page-f8et-primary-color);
    }

    .page-f8et-card h4 {
      font-size: 1.3em;
      color: var(--page-f8et-primary-color);
      margin-bottom: 10px;
    }
    .page-f8et-card h4 a {
        color: var(--page-f8et-primary-color);
        text-decoration: none;
    }
    .page-f8et-card h4 a:hover {
        text-decoration: underline;
    }


    .page-f8et-card p {
      font-size: 0.95em;
      color: var(--page-f8et-text-light-gray);
    }

    /* Nút đăng ký/đăng nhập nổi */
    .page-f8et-floating-buttons {
      position: fixed;
      bottom: 20px;
      right: 20px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 1000;
    }

    .page-f8et-floating-buttons .page-f8et-button {
      width: 150px;
      text-align: center;
      padding: 12px 20px;
      font-size: 1em;
      border-radius: 25px;
    }

    /* Danh sách */
    .page-f8et-list {
      list-style: none;
      padding: 0;
      margin: 20px 0;
    }

    .page-f8et-list li {
      background-color: var(--page-f8et-background-dark);
      margin-bottom: 10px;
      padding: 15px 20px;
      border-radius: 8px;
      border-left: 5px solid var(--page-f8et-primary-color);
      display: flex;
      align-items: center;
      font-size: 1.1em;
    }

    .page-f8et-list li::before {
      content: '✅';
      margin-right: 10px;
      font-size: 1.2em;
    }

    /* Bảng */
    .page-f8et-table-wrapper {
        overflow-x: auto;
        margin-top: 20px;
    }
    .page-f8et-table {
        width: 100%;
        border-collapse: collapse;
        margin: 20px 0;
        min-width: 600px; /* Ensure table is wide enough on mobile */
    }
    .page-f8et-table th, .page-f8et-table td {
        border: 1px solid var(--page-f8et-border-color);
        padding: 12px 15px;
        text-align: left;
    }
    .page-f8et-table th {
        background-color: var(--page-f8et-primary-color);
        color: var(--page-f8et-text-color);
        font-weight: bold;
        text-transform: uppercase;
    }
    .page-f8et-table tr:nth-child(even) {
        background-color: var(--page-f8et-background-dark);
    }
    .page-f8et-table tr:nth-child(odd) {
        background-color: var(--page-f8et-background-light);
    }
    .page-f8et-table td {
        color: var(--page-f8et-text-light-gray);
    }

    /* Responsive */
    @media (max-width: 768px) {
      .page-f8et-hero h1 {
        font-size: 2em;
      }

      .page-f8et-hero p {
        font-size: 1em;
      }

      .page-f8et-section h2 {
        font-size: 1.8em;
      }

      .page-f8et-grid {
        grid-template-columns: 1fr;
      }

      .page-f8et-floating-buttons {
        flex-direction: row;
        width: calc(100% - 40px);
        justify-content: space-around;
        bottom: 10px;
        right: 10px;
        left: 10px;
        background-color: rgba(26, 26, 26, 0.9);
        padding: 10px 0;
        border-radius: 10px;
        box-shadow: 0 -2px 10px rgba(0,0,0,0.5);
      }
      .page-f8et-floating-buttons .page-f8et-button {
          width: 48%; /* Adjust for mobile two-button layout */
          padding: 10px;
          font-size: 0.9em;
      }
    }
    @media (max-width: 480px) {
        .page-f8et-floating-buttons {
            flex-direction: column;
            align-items: center;
        }
        .page-f8et-floating-buttons .page-f8et-button {
            width: 90%;
        }
    }