:root {
      --page-bkwin__primary-color: #007bff; /* Xanh dương */
      --page-bkwin__secondary-color: #6c757d; /* Xám */
      --page-bkwin__accent-color: #ffc107; /* Vàng */
      --page-bkwin__dark-bg: #1a1a2e; /* Nền tối */
      --page-bkwin__dark-card-bg: #2b2b4d; /* Nền thẻ tối hơn */
      --page-bkwin__text-color: #e0e0e0; /* Màu chữ sáng */
      --page-bkwin__heading-color: #ffffff; /* Màu tiêu đề trắng */
      --page-bkwin__border-color: #3f3f6c; /* Màu viền */
      --page-bkwin__button-bg: #e44d26; /* Cam đỏ */
      --page-bkwin__button-hover-bg: #f06a48;
      --page-bkwin__success-color: #28a745; /* Xanh lá */
      --page-bkwin__info-color: #17a2b8; /* Xanh ngọc */
    }

    body {
      font-family: 'Arial', sans-serif;
      background-color: var(--page-bkwin__dark-bg);
      color: var(--page-bkwin__text-color);
      line-height: 1.6;
      margin: 0;
      padding: 0;
    }

    .page-bkwin {
      padding-top: 10px; /* Small padding at the top, assuming body padding-top is handled by shared.css */
      max-width: 100%;
      overflow-x: hidden;
    }

    .page-bkwin__section {
      padding: 40px 20px;
      margin-bottom: 20px;
      background-color: var(--page-bkwin__dark-card-bg);
      border-radius: 10px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    }

    .page-bkwin__hero-section {
      text-align: center;
      padding: 60px 20px 40px;
      background: linear-gradient(135deg, var(--page-bkwin__dark-bg) 0%, #0a0a1a 100%);
      position: relative;
      overflow: hidden;
      border-radius: 0; /* No border-radius for hero */
      margin-bottom: 0; /* No margin-bottom for hero */
    }

    .page-bkwin__hero-title {
      font-size: 2.8em;
      color: var(--page-bkwin__heading-color);
      margin-bottom: 15px;
      text-transform: uppercase;
      letter-spacing: 2px;
      font-weight: bold;
    }
    
    .page-bkwin__hero-subtitle {
      font-size: 1.4em;
      color: var(--page-bkwin__accent-color);
      margin-bottom: 30px;
      font-weight: normal;
    }

    .page-bkwin__hero-image {
      width: 100%;
      max-width: 800px;
      height: auto;
      border-radius: 10px;
      margin: 30px auto 0;
      display: block;
      box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    }

    .page-bkwin__floating-buttons {
      position: fixed;
      bottom: 20px;
      right: 20px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 1000;
    }

    .page-bkwin__floating-button {
      background-color: var(--page-bkwin__button-bg);
      color: #fff;
      border: none;
      padding: 12px 25px;
      border-radius: 30px;
      font-size: 1.1em;
      font-weight: bold;
      cursor: pointer;
      text-decoration: none;
      text-align: center;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      transition: background-color 0.3s ease, transform 0.2s ease;
      min-width: 120px; /* Ensure buttons have a minimum width */
      box-sizing: border-box;
    }

    .page-bkwin__floating-button:hover {
      background-color: var(--page-bkwin__button-hover-bg);
      transform: translateY(-2px);
    }
    
    .page-bkwin__floating-button--login {
        background-color: var(--page-bkwin__primary-color);
    }

    .page-bkwin__floating-button--login:hover {
        background-color: #0056b3;
    }

    .page-bkwin__heading {
      color: var(--page-bkwin__heading-color);
      font-size: 2.2em;
      text-align: center;
      margin-bottom: 30px;
      position: relative;
      padding-bottom: 10px;
    }

    .page-bkwin__heading::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 80px;
      height: 4px;
      background-color: var(--page-bkwin__accent-color);
      border-radius: 2px;
    }

    .page-bkwin__game-categories {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }

    .page-bkwin__category-card {
      background-color: var(--page-bkwin__dark-bg);
      border-radius: 10px;
      text-align: center;
      padding: 20px;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 180px;
      box-sizing: border-box;
    }

    .page-bkwin__category-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
    }

    .page-bkwin__category-image {
      width: 100%;
      max-width: 250px;
      height: auto;
      border-radius: 8px;
      margin-bottom: 15px;
      object-fit: cover;
    }

    .page-bkwin__category-title {
      font-size: 1.2em;
      color: var(--page-bkwin__accent-color);
      margin: 0;
      font-weight: bold;
    }

    .page-bkwin__promotions-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-bkwin__promotion-item {
      background-color: var(--page-bkwin__dark-bg);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .page-bkwin__promotion-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    }

    .page-bkwin__promotion-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
    }

    .page-bkwin__promotion-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-bkwin__promotion-title {
      font-size: 1.5em;
      color: var(--page-bkwin__accent-color);
      margin-top: 0;
      margin-bottom: 10px;
      font-weight: bold;
    }

    .page-bkwin__promotion-description {
      font-size: 0.95em;
      color: var(--page-bkwin__text-color);
      margin-bottom: 15px;
    }

    .page-bkwin__promotion-button {
      background-color: var(--page-bkwin__success-color);
      color: #fff;
      border: none;
      padding: 10px 20px;
      border-radius: 5px;
      font-size: 1em;
      cursor: pointer;
      align-self: flex-start;
      transition: background-color 0.3s ease;
      text-decoration: none; /* Ensure no underline */
      display: inline-block; /* Allow padding */
    }

    .page-bkwin__promotion-button:hover {
      background-color: #218838;
    }

    .page-bkwin__text-content {
      font-size: 1.1em;
      margin-bottom: 20px;
      color: var(--page-bkwin__text-color);
    }
    
    .page-bkwin__text-content h3 {
        color: var(--page-bkwin__accent-color);
        margin-top: 25px;
        margin-bottom: 15px;
        font-size: 1.6em;
    }

    .page-bkwin__list {
      list-style: none;
      padding: 0;
      margin: 20px 0;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 15px;
    }

    .page-bkwin__list-item {
      background-color: var(--page-bkwin__dark-bg);
      padding: 15px 20px;
      border-radius: 8px;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
      color: var(--page-bkwin__text-color);
      display: flex;
      align-items: center;
      gap: 10px;
      box-sizing: border-box; /* Crucial for responsiveness */
      word-wrap: break-word; /* Ensure text wraps */
      overflow-wrap: break-word; /* Ensure text wraps */
    }

    .page-bkwin__list-item::before {
      content: '✓';
      color: var(--page-bkwin__success-color);
      font-weight: bold;
      font-size: 1.2em;
    }

    .page-bkwin__grid-container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 20px;
        margin-top: 30px;
        justify-content: center;
    }

    .page-bkwin__grid-item {
        background-color: var(--page-bkwin__dark-bg);
        border-radius: 10px;
        padding: 15px;
        text-align: center;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
        transition: transform 0.3s ease;
        box-sizing: border-box;
    }

    .page-bkwin__grid-item:hover {
        transform: translateY(-3px);
    }

    .page-bkwin__grid-image {
        width: 100%;
        max-width: 100px; /* Adjust max-width for smaller logos */
        height: auto;
        object-fit: contain;
        margin-bottom: 10px;
        display: block;
        margin-left: auto;
        margin-right: auto;
    }

    .page-bkwin__grid-text {
        font-size: 0.9em;
        color: var(--page-bkwin__text-color);
        font-weight: bold;
    }

    .page-bkwin__faq-section {
      margin-top: 40px;
    }

    .page-bkwin__faq-item {
      background-color: var(--page-bkwin__dark-bg);
      border: 1px solid var(--page-bkwin__border-color);
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    }

    .page-bkwin__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      cursor: pointer;
      user-select: none;
      background-color: var(--page-bkwin__dark-card-bg);
      color: var(--page-bkwin__heading-color);
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease;
    }

    .page-bkwin__faq-question:hover {
      background-color: #3a3a60;
    }

    .page-bkwin__faq-question h3 {
        margin: 0;
        font-size: 1.1em;
        color: var(--page-bkwin__heading-color);
        pointer-events: none; /* Prevent h3 from blocking click */
    }

    .page-bkwin__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click */
    }

    .page-bkwin__faq-item.active .page-bkwin__faq-toggle {
      transform: rotate(45deg); /* Change '+' to 'x' visually */
    }
    
    .page-bkwin__faq-item.active .page-bkwin__faq-toggle::before {
        content: '−'; /* Change '+' to '−' */
        transform: rotate(0deg);
    }

    .page-bkwin__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px; /* Initial padding */
      opacity: 0;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      color: var(--page-bkwin__text-color);
      background-color: var(--page-bkwin__dark-bg);
    }

    .page-bkwin__faq-item.active .page-bkwin__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to show content */
      padding: 20px !important; /* Final padding */
      opacity: 1;
    }

    /* Mobile responsiveness */
    @media (max-width: 768px) {
      .page-bkwin {
        padding: 5px;
      }

      .page-bkwin__hero-title {
        font-size: 2em;
      }

      .page-bkwin__hero-subtitle {
        font-size: 1.1em;
      }

      .page-bkwin__section {
        padding: 30px 15px;
      }

      .page-bkwin__heading {
        font-size: 1.8em;
        margin-bottom: 25px;
      }

      .page-bkwin__game-categories {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 15px;
      }

      .page-bkwin__category-card {
        padding: 15px;
        min-height: 150px;
      }

      .page-bkwin__category-image {
        max-width: 100px;
        margin-bottom: 10px;
      }

      .page-bkwin__category-title {
        font-size: 1em;
      }

      .page-bkwin__promotions-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }
      
      .page-bkwin__promotion-image {
        height: 180px;
      }

      .page-bkwin__promotion-title {
        font-size: 1.3em;
      }

      .page-bkwin__text-content {
        font-size: 1em;
      }
      
      .page-bkwin__text-content h3 {
          font-size: 1.4em;
      }

      .page-bkwin__list {
        grid-template-columns: 1fr; /* Stack list items on mobile */
        gap: 10px;
      }

      .page-bkwin__list-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        padding: 12px 15px !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }

      .page-bkwin__grid-container {
          grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
          gap: 15px;
      }

      .page-bkwin__grid-item {
          padding: 10px;
      }

      .page-bkwin__grid-image {
          max-width: 80px;
      }

      .page-bkwin__faq-question {
        padding: 12px 15px;
        font-size: 1em;
      }

      .page-bkwin__faq-question h3 {
          font-size: 1em;
      }

      .page-bkwin__faq-answer {
        padding: 0 15px; /* Initial padding */
      }

      .page-bkwin__faq-item.active .page-bkwin__faq-answer {
        padding: 15px !important; /* Final padding */
      }
    }

    @media (max-width: 480px) {
        .page-bkwin__floating-buttons {
            flex-direction: row;
            justify-content: center;
            width: 100%;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(26, 26, 46, 0.95);
            padding: 10px 5px;
            border-top: 1px solid var(--page-bkwin__border-color);
            border-radius: 0;
        }

        .page-bkwin__floating-button {
            flex: 1;
            padding: 10px 15px;
            font-size: 0.95em;
            min-width: unset;
        }
        .page-bkwin__hero-title {
            font-size: 1.8em;
        }
        .page-bkwin__hero-subtitle {
            font-size: 1em;
        }
    }