:root {
      --page-i9betapp-primary-color: #ffd700; /* Vàng */
      --page-i9betapp-secondary-color: #ffffff; /* Trắng */
      --page-i9betapp-background-color: #000000; /* Đen */
      --page-i9betapp-dark-gray: #1a1a1a;
      --page-i9betapp-light-gray: #333333;
    }

    body {
      margin: 0;
      font-family: 'Arial', sans-serif;
      background-color: var(--page-i9betapp-background-color);
      color: var(--page-i9betapp-secondary-color);
    }

    .page-i9betapp {
      background-color: var(--page-i9betapp-background-color);
      color: var(--page-i9betapp-secondary-color);
      line-height: 1.6;
      overflow-x: hidden;
    }

    .page-i9betapp__section {
      padding: 40px 20px;
      text-align: center;
      max-width: 1200px;
      margin: 0 auto;
    }

    .page-i9betapp__section--dark {
      background-color: var(--page-i9betapp-dark-gray);
    }

    .page-i9betapp__heading {
      color: var(--page-i9betapp-primary-color);
      margin-bottom: 20px;
      font-size: 2.5em;
    }

    .page-i9betapp__subheading {
      color: var(--page-i9betapp-secondary-color);
      margin-bottom: 30px;
      font-size: 1.5em;
    }

    .page-i9betapp__paragraph {
      margin-bottom: 20px;
      font-size: 1.1em;
      color: var(--page-i9betapp-secondary-color);
    }

    /* Hero Section */
    .page-i9betapp__hero-section {
      position: relative;
      background-color: var(--page-i9betapp-dark-gray);
      padding-top: 10px; /* Safety zone for fixed header */
      padding-bottom: 40px;
      overflow: hidden;
    }

    .page-i9betapp__hero-image-container {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      margin-bottom: 20px;
    }

    .page-i9betapp__hero-image {
      max-width: 100%;
      height: auto;
      display: block;
      margin: 0 auto;
      border-radius: 10px;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
    }

    .page-i9betapp__hero-content {
      position: relative;
      z-index: 1;
      text-align: center;
      padding: 0 20px;
    }

    .page-i9betapp__hero-title {
      font-size: 3em;
      color: var(--page-i9betapp-primary-color);
      margin-bottom: 15px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-i9betapp__hero-description {
      font-size: 1.3em;
      color: var(--page-i9betapp-secondary-color);
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-i9betapp__cta-button {
      display: inline-block;
      background-color: var(--page-i9betapp-primary-color);
      color: var(--page-i9betapp-background-color);
      padding: 15px 30px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.2em;
      transition: background-color 0.3s ease, transform 0.3s ease;
      border: none;
      cursor: pointer;
    }

    .page-i9betapp__cta-button:hover {
      background-color: #e6b800;
      transform: translateY(-3px);
    }

    /* Promo Bar (Floating Login Button) */
    .page-i9betapp__promo-bar {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 1000;
      background: linear-gradient(90deg, #ff4d4d, #ffa500);
      padding: 10px 20px;
      border-radius: 50px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
      display: flex;
      align-items: center;
      gap: 10px;
      animation: page-i9betapp__pulse 2s infinite;
    }

    .page-i9betapp__promo-text {
      color: var(--page-i9betapp-secondary-color);
      font-weight: bold;
      font-size: 1em;
      text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
    }

    .page-i9betapp__promo-button {
      background-color: var(--page-i9betapp-primary-color);
      color: var(--page-i9betapp-background-color);
      padding: 8px 18px;
      border-radius: 30px;
      text-decoration: none;
      font-weight: bold;
      font-size: 0.9em;
      transition: background-color 0.3s ease;
      border: none;
      cursor: pointer;
    }

    .page-i9betapp__promo-button:hover {
      background-color: #e6b800;
    }

    @keyframes page-i9betapp__pulse {
      0% { transform: translateX(-50%) scale(1); }
      50% { transform: translateX(-50%) scale(1.05); }
      100% { transform: translateX(-50%) scale(1); }
    }

    /* Game Categories Section */
    .page-i9betapp__game-categories {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 30px;
      margin-top: 30px;
    }

    .page-i9betapp__game-card {
      background-color: var(--page-i9betapp-light-gray);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
      padding-bottom: 20px;
      box-sizing: border-box;
    }

    .page-i9betapp__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
    }

    .page-i9betapp__game-image-container {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      height: 200px; /* Fixed height for consistency */
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .page-i9betapp__game-image {
      max-width: 100%;
      height: auto;
      display: block;
      object-fit: cover; /* Ensures image covers the area without distortion */
      width: 100%;
      height: 100%;
    }

    .page-i9betapp__game-title {
      color: var(--page-i9betapp-primary-color);
      font-size: 1.4em;
      margin: 20px 15px 10px;
    }

    .page-i9betapp__game-description {
      color: var(--page-i9betapp-secondary-color);
      font-size: 0.95em;
      padding: 0 15px;
    }

    /* How-to Section */
    .page-i9betapp__steps-list {
      list-style: none;
      padding: 0;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 30px;
      margin-top: 30px;
    }

    .page-i9betapp__step-item {
      background-color: var(--page-i9betapp-light-gray);
      border-radius: 10px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      padding: 30px;
      text-align: left;
      flex: 1;
      min-width: 280px;
      max-width: 350px;
      box-sizing: border-box;
      position: relative;
      padding-top: 60px;
    }

    .page-i9betapp__step-number {
      position: absolute;
      top: 15px;
      left: 15px;
      background-color: var(--page-i9betapp-primary-color);
      color: var(--page-i9betapp-background-color);
      width: 40px;
      height: 40px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5em;
      font-weight: bold;
    }

    .page-i9betapp__step-title {
      color: var(--page-i9betapp-primary-color);
      font-size: 1.3em;
      margin-bottom: 10px;
    }

    .page-i9betapp__step-description {
      color: var(--page-i9betapp-secondary-color);
      font-size: 1em;
    }

    /* FAQ Section */
    .page-i9betapp__faq-container {
      margin-top: 40px;
      text-align: left;
    }

    .page-i9betapp__faq-item {
      background-color: var(--page-i9betapp-light-gray);
      margin-bottom: 15px;
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    }

    .page-i9betapp__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      background-color: var(--page-i9betapp-dark-gray);
      color: var(--page-i9betapp-secondary-color);
      cursor: pointer;
      font-size: 1.1em;
      font-weight: bold;
      transition: background-color 0.3s ease;
      user-select: none;
    }

    .page-i9betapp__faq-question h3 {
      margin: 0;
      color: var(--page-i9betapp-secondary-color);
      font-size: 1.1em;
      pointer-events: none; /* Prevents text from blocking click event */
      flex-grow: 1;
    }

    .page-i9betapp__faq-question:hover {
      background-color: #2a2a2a;
    }

    .page-i9betapp__faq-toggle {
      font-size: 1.8em;
      line-height: 1;
      color: var(--page-i9betapp-primary-color);
      pointer-events: none; /* Prevents icon from blocking click event */
      transition: transform 0.3s ease;
    }

    .page-i9betapp__faq-item.active .page-i9betapp__faq-toggle {
      transform: rotate(45deg); /* Changes '+' to 'x' visually */
    }

    .page-i9betapp__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      color: var(--page-i9betapp-secondary-color);
      background-color: var(--page-i9betapp-light-gray);
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
    }

    .page-i9betapp__faq-item.active .page-i9betapp__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px 25px !important;
      opacity: 1;
    }

    .page-i9betapp__faq-answer p {
      margin: 0;
      font-size: 0.95em;
    }

    /* Responsive Design */
    @media (max-width: 1024px) {
      .page-i9betapp__hero-title {
        font-size: 2.5em;
      }
      .page-i9betapp__hero-description {
        font-size: 1.1em;
      }
      .page-i9betapp__heading {
        font-size: 2em;
      }
      .page-i9betapp__subheading {
        font-size: 1.3em;
      }
    }

    @media (max-width: 768px) {
      .page-i9betapp__hero-section {
        padding-top: 10px !important; /* Ensure safety zone on mobile */
      }
      .page-i9betapp__hero-title {
        font-size: 2em;
      }
      .page-i9betapp__hero-description {
        font-size: 1em;
      }
      .page-i9betapp__cta-button {
        padding: 12px 25px;
        font-size: 1em;
      }
      .page-i9betapp__heading {
        font-size: 1.8em;
      }
      .page-i9betapp__subheading {
        font-size: 1.1em;
      }
      .page-i9betapp__paragraph {
        font-size: 0.95em;
      }

      .page-i9betapp__game-categories {
        grid-template-columns: 1fr;
      }

      .page-i9betapp__steps-list {
        flex-direction: column;
        align-items: center;
      }
      .page-i9betapp__step-item {
        width: 100% !important;
        max-width: 90% !important; /* Adjusted for smaller screens */
        margin-left: 0 !important;
        margin-right: 0 !important;
        box-sizing: border-box !important;
        padding: 50px 20px 20px !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
      }
      .page-i9betapp__step-description {
        word-break: break-word !important;
      }

      .page-i9betapp__promo-bar {
        width: calc(100% - 40px);
        bottom: 15px;
        padding: 8px 15px;
        box-sizing: border-box;
      }
      .page-i9betapp__promo-text {
        font-size: 0.9em;
      }
      .page-i9betapp__promo-button {
        padding: 7px 15px;
        font-size: 0.85em;
      }

      .page-i9betapp__faq-question {
        padding: 15px 20px;
        font-size: 1em;
      }
      .page-i9betapp__faq-question h3 {
        font-size: 1em;
      }
      .page-i9betapp__faq-answer {
        padding: 0 20px;
      }
      .page-i9betapp__faq-item.active .page-i9betapp__faq-answer {
        padding: 15px 20px !important;
      }

      /* Image responsive rules for mobile */
      .page-i9betapp__hero-image,
      .page-i9betapp__game-image {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
      .page-i9betapp__hero-image-container,
      .page-i9betapp__game-image-container {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
    }

    @media (max-width: 480px) {
      .page-i9betapp__section {
        padding: 30px 15px;
      }
      .page-i9betapp__hero-title {
        font-size: 1.8em;
      }
      .page-i9betapp__hero-description {
        font-size: 0.9em;
      }
      .page-i9betapp__cta-button {
        padding: 10px 20px;
        font-size: 0.9em;
      }
      .page-i9betapp__heading {
        font-size: 1.5em;
      }
      .page-i9betapp__subheading {
        font-size: 1em;
      }
    }