/* Reset và biến cơ bản */
    :root {
      --page-b52rewards-primary-color: #FFD700; /* Vàng kim */
      --page-b52rewards-secondary-color: #1a1a2e; /* Xanh đậm */
      --page-b52rewards-accent-color: #E74C3C; /* Đỏ */
      --page-b52rewards-text-light: #e0e0e0;
      --page-b52rewards-text-dark: #333333;
      --page-b52rewards-background-dark: #0f0f1c;
      --page-b52rewards-background-light: #2c3e50;
      --page-b52rewards-button-hover: #FFC107;
    }

    .page-b52rewards {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--page-b52rewards-text-light);
      background-color: var(--page-b52rewards-background-dark);
      margin: 0;
      padding: 0;
      overflow-x: hidden; /* Ngăn chặn cuộn ngang */
    }

    /* Các phần chung */
    .page-b52rewards-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 15px;
    }

    .page-b52rewards-section {
      padding: 40px 15px;
      text-align: center;
    }

    .page-b52rewards-section-dark {
      background-color: var(--page-b52rewards-background-light);
    }

    .page-b52rewards-title {
      color: var(--page-b52rewards-primary-color);
      font-size: 2.5em;
      margin-bottom: 20px;
      text-transform: uppercase;
      font-weight: bold;
    }
    
    .page-b52rewards-subtitle {
      color: var(--page-b52rewards-primary-color);
      font-size: 1.8em;
      margin-bottom: 15px;
    }

    .page-b52rewards-text {
      font-size: 1.1em;
      margin-bottom: 20px;
      color: var(--page-b52rewards-text-light);
    }

    .page-b52rewards-text-link {
        color: var(--page-b52rewards-primary-color);
        text-decoration: underline;
        transition: color 0.3s ease;
    }

    .page-b52rewards-text-link:hover {
        color: var(--page-b52rewards-button-hover);
    }

    .page-b52rewards-button {
      display: inline-block;
      background-color: var(--page-b52rewards-primary-color);
      color: var(--page-b52rewards-secondary-color);
      padding: 12px 25px;
      border-radius: 30px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
    }

    .page-b52rewards-button:hover {
      background-color: var(--page-b52rewards-button-hover);
      transform: translateY(-2px);
    }

    /* Banner chính */
    .page-b52rewards-hero {
      padding: 80px 15px 40px; /* Thêm padding trên để banner không bị sát top */
      min-height: 350px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      position: relative;
    }

    .page-b52rewards-hero::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-image: url('[GALLERY:banner:b52,hero,main]'); /* Banner chính */
        background-size: cover;
        background-position: center top;
        filter: brightness(0.5); /* Làm mờ ảnh nền để text dễ đọc */
        z-index: -1;
    }

    .page-b52rewards-hero-content {
      position: relative;
      z-index: 1;
      max-width: 800px;
    }

    .page-b52rewards-hero h1 {
      font-size: 2.8em;
      color: var(--page-b52rewards-primary-color);
      margin-bottom: 15px;
      line-height: 1.2;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-b52rewards-hero p {
      font-size: 1.3em;
      color: var(--page-b52rewards-text-light);
      margin-bottom: 30px;
      text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    }

    /* Nút đăng nhập nổi */
    .page-b52rewards-floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-b52rewards-accent-color);
      color: #FFFFFF;
      padding: 15px 25px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      z-index: 1000;
      transition: background-color 0.3s ease, transform 0.3s ease, opacity 0.3s ease;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .page-b52rewards-floating-button:hover {
      background-color: #C0392B;
      transform: translateY(-3px);
    }

    .page-b52rewards-floating-button svg {
      fill: currentColor;
      width: 20px;
      height: 20px;
    }

    /* Phần giới thiệu */
    .page-b52rewards-intro-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 30px;
      margin-top: 30px;
    }

    .page-b52rewards-intro-item {
      background-color: var(--page-b52rewards-background-light);
      padding: 25px;
      border-radius: 10px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
      text-align: left;
    }

    .page-b52rewards-intro-item h3 {
      color: var(--page-b52rewards-primary-color);
      font-size: 1.5em;
      margin-bottom: 10px;
    }

    .page-b52rewards-intro-item p {
      font-size: 1em;
      color: var(--page-b52rewards-text-light);
    }

    /* Phần sản phẩm/trò chơi */
    .page-b52rewards-game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-b52rewards-game-card {
      background-color: var(--page-b52rewards-background-light);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
      transition: transform 0.3s ease;
      text-align: center;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-b52rewards-game-card:hover {
      transform: translateY(-5px);
    }

    .page-b52rewards-game-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      display: block;
    }

    .page-b52rewards-game-card-content {
      padding: 20px;
    }

    .page-b52rewards-game-card h3 {
      font-size: 1.3em;
      color: var(--page-b52rewards-primary-color);
      margin-bottom: 10px;
    }

    .page-b52rewards-game-card p {
      font-size: 0.95em;
      color: var(--page-b52rewards-text-light);
      margin-bottom: 15px;
    }

    /* Phần khuyến mãi */
    .page-b52rewards-promo-card {
      background-color: var(--page-b52rewards-background-light);
      border-radius: 10px;
      padding: 30px;
      margin-bottom: 20px;
      text-align: left;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
      border-left: 5px solid var(--page-b52rewards-primary-color);
    }

    .page-b52rewards-promo-card h3 {
      color: var(--page-b52rewards-primary-color);
      font-size: 1.6em;
      margin-bottom: 10px;
    }

    .page-b52rewards-promo-card p {
      color: var(--page-b52rewards-text-light);
      margin-bottom: 15px;
    }

    /* Phần hướng dẫn */
    .page-b52rewards-guide-list {
      list-style: none;
      padding: 0;
      text-align: left;
    }

    .page-b52rewards-guide-list li {
      background-color: var(--page-b52rewards-background-light);
      margin-bottom: 15px;
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
      display: flex;
      align-items: flex-start;
      gap: 15px;
    }

    .page-b52rewards-guide-list li::before {
      content: '✓';
      color: var(--page-b52rewards-primary-color);
      font-weight: bold;
      font-size: 1.5em;
      line-height: 1;
    }

    .page-b52rewards-guide-list h4 {
      color: var(--page-b52rewards-primary-color);
      font-size: 1.2em;
      margin-top: 0;
      margin-bottom: 5px;
    }

    .page-b52rewards-guide-list p {
      font-size: 0.95em;
      color: var(--page-b52rewards-text-light);
      margin-bottom: 0;
    }

    .page-b52rewards-image-full {
        width: 100%;
        max-width: 800px;
        height: auto;
        border-radius: 10px;
        margin-top: 20px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    }

    /* Responsive */
    @media (min-width: 768px) {
      .page-b52rewards-hero h1 {
        font-size: 3.5em;
      }

      .page-b52rewards-hero p {
        font-size: 1.5em;
      }

      .page-b52rewards-title {
        font-size: 3em;
      }
      
      .page-b52rewards-intro-grid {
        grid-template-columns: repeat(3, 1fr);
      }
    }