:root {
      --page-tt88dangnhap__primary-color: #FFD700; /* Vàng */
      --page-tt88dangnhap__secondary-color: #FFFFFF; /* Trắng */
      --page-tt88dangnhap__background-color: #000000; /* Đen */
      --page-tt88dangnhap__dark-grey: #1a1a1a;
      --page-tt88dangnhap__light-grey: #333333;
    }

    .page-tt88dangnhap {
      font-family: 'Arial', sans-serif;
      background-color: var(--page-tt88dangnhap__background-color);
      color: var(--page-tt88dangnhap__secondary-color);
      line-height: 1.6;
      padding: 0;
      margin: 0;
      box-sizing: border-box;
      overflow-x: hidden;
    }

    .page-tt88dangnhap__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
      box-sizing: border-box;
    }

    .page-tt88dangnhap__hero-section {
      position: relative;
      width: 100%;
      text-align: center;
      padding-top: 10px; /* Safety zone for fixed header */
      margin-bottom: 30px;
      box-sizing: border-box;
    }

    .page-tt88dangnhap__hero-image {
      width: 100%;
      max-width: 100%;
      height: auto;
      display: block;
      margin: 0 auto;
      border-radius: 8px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    }

    .page-tt88dangnhap__hero-content {
      position: relative;
      padding: 20px;
      background: linear-gradient(180deg, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0.9) 100%);
      margin-top: -80px; /* Overlap image slightly for effect */
      border-bottom-left-radius: 8px;
      border-bottom-right-radius: 8px;
    }

    .page-tt88dangnhap__hero-content h1 {
      color: var(--page-tt88dangnhap__primary-color);
      font-size: 2.5em;
      margin-bottom: 10px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-tt88dangnhap__hero-content p {
      font-size: 1.1em;
      margin-bottom: 20px;
      color: var(--page-tt88dangnhap__secondary-color);
    }

    .page-tt88dangnhap__button {
      display: inline-block;
      background-color: var(--page-tt88dangnhap__primary-color);
      color: var(--page-tt88dangnhap__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 0.2s ease;
      box-shadow: 0 4px 10px rgba(255, 215, 0, 0.4);
      border: none;
      cursor: pointer;
    }

    .page-tt88dangnhap__button:hover {
      background-color: #FFEA00;
      transform: translateY(-2px);
    }

    .page-tt88dangnhap__section {
      padding: 40px 0;
      text-align: center;
    }

    .page-tt88dangnhap__section-title {
      color: var(--page-tt88dangnhap__primary-color);
      font-size: 2em;
      margin-bottom: 30px;
      position: relative;
      display: inline-block;
    }

    .page-tt88dangnhap__section-title::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: -10px;
      transform: translateX(-50%);
      width: 60px;
      height: 3px;
      background-color: var(--page-tt88dangnhap__primary-color);
    }

    .page-tt88dangnhap__text-content p {
      margin-bottom: 15px;
      color: var(--page-tt88dangnhap__secondary-color);
      font-size: 1.1em;
    }

    .page-tt88dangnhap__text-content strong {
      color: var(--page-tt88dangnhap__primary-color);
    }

    .page-tt88dangnhap__game-categories {
      background-color: var(--page-tt88dangnhap__dark-grey);
      padding: 50px 0;
    }

    .page-tt88dangnhap__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 25px;
      padding: 0 20px;
    }

    .page-tt88dangnhap__game-card {
      background-color: var(--page-tt88dangnhap__light-grey);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .page-tt88dangnhap__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 25px rgba(255, 215, 0, 0.3);
    }

    .page-tt88dangnhap__game-card-image-wrapper {
      width: 100%;
      height: 200px; /* Fixed height for consistency */
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .page-tt88dangnhap__game-card-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .page-tt88dangnhap__game-card-content {
      padding: 15px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-tt88dangnhap__game-card-content h3 {
      font-size: 1.4em;
      margin-top: 0;
      margin-bottom: 10px;
      color: var(--page-tt88dangnhap__primary-color);
    }

    .page-tt88dangnhap__game-card-content p {
      font-size: 0.95em;
      color: var(--page-tt88dangnhap__secondary-color);
      margin-bottom: 15px;
      flex-grow: 1;
    }

    .page-tt88dangnhap__game-card-content .page-tt88dangnhap__button {
      padding: 10px 20px;
      font-size: 1em;
      border-radius: 30px;
      align-self: center;
    }

    .page-tt88dangnhap__promotions-section {
      background-color: var(--page-tt88dangnhap__background-color);
      padding: 50px 0;
    }

    .page-tt88dangnhap__promotion-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
      padding: 0 20px;
    }

    .page-tt88dangnhap__promotion-card {
      background-color: var(--page-tt88dangnhap__light-grey);
      border-radius: 10px;
      padding: 25px;
      text-align: left;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, background-color 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      min-height: 220px;
    }

    .page-tt88dangnhap__promotion-card:hover {
      transform: translateY(-5px);
      background-color: var(--page-tt88dangnhap__dark-grey);
    }

    .page-tt88dangnhap__promotion-card h3 {
      color: var(--page-tt88dangnhap__primary-color);
      font-size: 1.5em;
      margin-top: 0;
      margin-bottom: 15px;
    }

    .page-tt88dangnhap__promotion-card p {
      color: var(--page-tt88dangnhap__secondary-color);
      font-size: 1em;
      margin-bottom: 20px;
    }

    .page-tt88dangnhap__login-guide {
      background-color: var(--page-tt88dangnhap__dark-grey);
      padding: 50px 0;
    }

    .page-tt88dangnhap__guide-steps {
      list-style: none;
      padding: 0;
      margin: 0;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 30px;
    }

    .page-tt88dangnhap__guide-item {
      background-color: var(--page-tt88dangnhap__light-grey);
      border-radius: 10px;
      padding: 25px;
      text-align: center;
      flex: 1 1 300px;
      max-width: 350px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease;
    }

    .page-tt88dangnhap__guide-item:hover {
      transform: translateY(-5px);
    }

    .page-tt88dangnhap__guide-item h4 {
      color: var(--page-tt88dangnhap__primary-color);
      font-size: 1.3em;
      margin-top: 15px;
      margin-bottom: 10px;
    }

    .page-tt88dangnhap__guide-item p {
      color: var(--page-tt88dangnhap__secondary-color);
      font-size: 1em;
    }

    .page-tt88dangnhap__guide-icon {
      width: 80px;
      height: 80px;
      margin-bottom: 15px;
      display: inline-block;
      line-height: 80px;
      font-size: 3em;
      color: var(--page-tt88dangnhap__primary-color);
      background-color: rgba(255, 215, 0, 0.1);
      border-radius: 50%;
    }

    .page-tt88dangnhap__why-choose-us {
      padding: 50px 0;
    }

    .page-tt88dangnhap__feature-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      padding: 0 20px;
    }

    .page-tt88dangnhap__feature-card {
      background-color: var(--page-tt88dangnhap__light-grey);
      border-radius: 10px;
      padding: 25px;
      text-align: left;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      transition: background-color 0.3s ease;
    }

    .page-tt88dangnhap__feature-card:hover {
      background-color: var(--page-tt88dangnhap__dark-grey);
    }

    .page-tt88dangnhap__feature-card h3 {
      color: var(--page-tt88dangnhap__primary-color);
      font-size: 1.4em;
      margin-top: 0;
      margin-bottom: 10px;
    }

    .page-tt88dangnhap__feature-card p {
      color: var(--page-tt88dangnhap__secondary-color);
      font-size: 1em;
    }

    /* FAQ Styles */
    .page-tt88dangnhap__faq-section {
      background-color: var(--page-tt88dangnhap__dark-grey);
      padding: 50px 0;
    }

    .page-tt88dangnhap__faq-list {
      max-width: 800px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .page-tt88dangnhap__faq-item {
      background-color: var(--page-tt88dangnhap__light-grey);
      margin-bottom: 15px;
      border-radius: 8px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
      overflow: hidden;
    }

    .page-tt88dangnhap__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      background-color: var(--page-tt88dangnhap__light-grey);
      color: var(--page-tt88dangnhap__primary-color);
      cursor: pointer;
      font-size: 1.15em;
      font-weight: bold;
      transition: background-color 0.3s ease;
      user-select: none;
    }

    .page-tt88dangnhap__faq-question:hover {
      background-color: var(--page-tt88dangnhap__dark-grey);
    }

    .page-tt88dangnhap__faq-question h3 {
      margin: 0;
      font-size: 1.15em;
      color: var(--page-tt88dangnhap__primary-color);
      pointer-events: none; /* Prevent h3 from capturing click */
    }

    .page-tt88dangnhap__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      margin-left: 15px;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from capturing click */
    }

    .page-tt88dangnhap__faq-item.active .page-tt88dangnhap__faq-toggle {
      transform: rotate(45deg); /* Plus to Minus effect */
    }

    .page-tt88dangnhap__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      color: var(--page-tt88dangnhap__secondary-color);
      background-color: #2a2a2a;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
    }

    .page-tt88dangnhap__faq-item.active .page-tt88dangnhap__faq-answer {
      max-height: 2000px !important; /* Large enough to contain content */
      padding: 20px 25px !important;
      opacity: 1;
    }

    .page-tt88dangnhap__faq-answer p {
      margin: 0 0 10px 0;
    }
    .page-tt88dangnhap__faq-answer p:last-child {
      margin-bottom: 0;
    }

    .page-tt88dangnhap__cta-section {
      background-color: var(--page-tt88dangnhap__background-color);
      padding: 60px 20px;
      text-align: center;
    }

    .page-tt88dangnhap__cta-section h2 {
      color: var(--page-tt88dangnhap__primary-color);
      font-size: 2.2em;
      margin-bottom: 20px;
    }

    .page-tt88dangnhap__cta-section p {
      color: var(--page-tt88dangnhap__secondary-color);
      font-size: 1.1em;
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Responsive adjustments */
    @media (max-width: 1024px) {
      .page-tt88dangnhap__hero-content h1 {
        font-size: 2.2em;
      }
      .page-tt88dangnhap__game-grid,
      .page-tt88dangnhap__promotion-grid,
      .page-tt88dangnhap__feature-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      }
    }

    @media (max-width: 768px) {
      .page-tt88dangnhap__container {
        padding: 15px;
      }
      .page-tt88dangnhap__hero-section {
        padding-top: 10px; /* Ensure mobile safety zone */
      }
      .page-tt88dangnhap__hero-content {
        margin-top: -60px;
      }
      .page-tt88dangnhap__hero-content h1 {
        font-size: 1.8em;
      }
      .page-tt88dangnhap__hero-content p {
        font-size: 1em;
      }
      .page-tt88dangnhap__button {
        padding: 12px 25px;
        font-size: 1.1em;
      }
      .page-tt88dangnhap__section-title {
        font-size: 1.8em;
      }
      .page-tt88dangnhap__text-content p {
        font-size: 1em;
      }
      .page-tt88dangnhap__game-grid,
      .page-tt88dangnhap__promotion-grid,
      .page-tt88dangnhap__feature-grid {
        grid-template-columns: 1fr;
      }
      .page-tt88dangnhap__game-card-image-wrapper {
        height: 180px;
      }
      .page-tt88dangnhap__guide-item {
        max-width: 100%;
      }
      .page-tt88dangnhap__faq-question {
        font-size: 1em;
        padding: 15px 20px;
      }
      .page-tt88dangnhap__faq-question h3 {
        font-size: 1em;
      }
      .page-tt88dangnhap__faq-answer {
        padding: 0 20px;
      }
      .page-tt88dangnhap__faq-item.active .page-tt88dangnhap__faq-answer {
        padding: 15px 20px !important;
      }
      .page-tt88dangnhap__cta-section h2 {
        font-size: 1.8em;
      }
      .page-tt88dangnhap__cta-section p {
        font-size: 1em;
      }

      /* Image responsive forcing */
      .page-tt88dangnhap__hero-image,
      .page-tt88dangnhap__game-card-image {
        max-width: 100% !important;
        height: auto !important;
      }
      .page-tt88dangnhap__hero-section,
      .page-tt88dangnhap__game-card-image-wrapper {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
    }

    @media (max-width: 480px) {
      .page-tt88dangnhap__hero-content h1 {
        font-size: 1.6em;
      }
      .page-tt88dangnhap__button {
        padding: 10px 20px;
        font-size: 1em;
      }
      .page-tt88dangnhap__section-title {
        font-size: 1.6em;
      }
      .page-tt88dangnhap__game-card-image-wrapper {
        height: 150px;
      }
      .page-tt88dangnhap__game-card-content h3 {
        font-size: 1.2em;
      }
      .page-tt88dangnhap__promotion-card h3 {
        font-size: 1.3em;
      }
      .page-tt88dangnhap__faq-question {
        padding: 12px 15px;
        font-size: 0.95em;
      }
      .page-tt88dangnhap__faq-question h3 {
        font-size: 0.95em;
      }
      .page-tt88dangnhap__faq-item.active .page-tt88dangnhap__faq-answer {
        padding: 10px 15px !important;
      }
    }