:root {
      --primary-color: #e44d26; /* Cam đỏ */
      --secondary-color: #f7b731; /* Vàng */
      --accent-color: #3498db; /* Xanh dương */
      --text-dark: #333333;
      --text-light: #ffffff;
      --bg-light: #f5f5f5;
      --bg-dark: #2c3e50; /* Xám xanh đậm */
      --border-color: #e0e0e0;
      --shadow-light: rgba(0, 0, 0, 0.1);
      --header-offset: 122px; /* Default value, will be overridden by shared.css */
    }

    /* Base styles for the page-dangnhap scope */
    .page-dangnhap {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--text-dark);
      background-color: var(--bg-light);
      padding-bottom: 60px;
      padding-top: var(--header-offset, 122px); /* Fallback for body padding-top */
    }

    .page-dangnhap__section {
      padding: 40px 20px;
      margin: 0 auto;
      max-width: 1200px;
      box-sizing: border-box;
    }

    .page-dangnhap__section--hero {
      background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
      color: var(--text-light);
      text-align: center;
      padding: 80px 20px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      position: relative;
      overflow: hidden;
      padding-top: calc(80px + 10px); /* Add a small padding for visual separation from header */
    }

    .page-dangnhap__hero-background {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      z-index: 0;
      opacity: 0.2;
    }

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

    .page-dangnhap__hero-title {
      font-size: 3.2em;
      margin-bottom: 15px;
      color: var(--text-light);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    }

    .page-dangnhap__hero-subtitle {
      font-size: 1.5em;
      margin-bottom: 30px;
      opacity: 0.9;
    }

    .page-dangnhap__cta-button {
      display: inline-block;
      background-color: var(--accent-color);
      color: var(--text-light);
      padding: 15px 30px;
      border-radius: 50px;
      text-decoration: none;
      font-size: 1.2em;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
    }

    .page-dangnhap__cta-button:hover {
      background-color: #2980b9;
      transform: translateY(-3px);
    }

    .page-dangnhap__heading {
      font-size: 2.5em;
      color: var(--primary-color);
      text-align: center;
      margin-bottom: 40px;
      position: relative;
    }

    .page-dangnhap__heading::after {
      content: '';
      display: block;
      width: 80px;
      height: 4px;
      background-color: var(--secondary-color);
      margin: 15px auto 0;
      border-radius: 2px;
    }

    .page-dangnhap__sub-heading {
      font-size: 1.8em;
      color: var(--primary-color);
      margin-top: 30px;
      margin-bottom: 20px;
    }

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

    .page-dangnhap__image-wrapper {
      margin: 30px 0;
      text-align: center;
      background-color: var(--text-light);
      padding: 15px;
      border-radius: 10px;
      box-shadow: 0 4px 15px var(--shadow-light);
      overflow: hidden;
      width: 100%;
      max-width: 100%;
      box-sizing: border-box;
    }

    .page-dangnhap__image {
      max-width: 100%;
      height: auto;
      border-radius: 8px;
      display: block;
      margin: 0 auto;
      object-fit: contain;
    }

    .page-dangnhap__steps-list {
      list-style: none;
      padding: 0;
      margin: 30px 0;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
    }

    .page-dangnhap__step-item {
      background-color: var(--text-light);
      padding: 25px;
      border-radius: 10px;
      box-shadow: 0 4px 15px var(--shadow-light);
      transition: transform 0.3s ease;
      border-left: 5px solid var(--primary-color);
      box-sizing: border-box;
    }

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

    .page-dangnhap__step-number {
      font-size: 2.5em;
      color: var(--secondary-color);
      font-weight: bold;
      margin-bottom: 15px;
      display: block;
    }

    .page-dangnhap__step-title {
      font-size: 1.4em;
      color: var(--primary-color);
      margin-bottom: 10px;
    }

    .page-dangnhap__step-description {
      font-size: 1em;
      color: var(--text-dark);
    }

    .page-dangnhap__highlight-box {
      background-color: #fff3e0; /* Light orange background */
      border-left: 5px solid var(--secondary-color);
      padding: 20px;
      margin: 30px 0;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
      color: #614a00; /* Darker text for contrast */
    }

    .page-dangnhap__highlight-box strong {
      color: var(--primary-color);
    }

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

    .page-dangnhap__game-card {
      background-color: var(--text-light);
      border-radius: 10px;
      box-shadow: 0 4px 12px var(--shadow-light);
      overflow: hidden;
      text-align: center;
      transition: transform 0.3s ease;
      display: flex;
      flex-direction: column;
      box-sizing: border-box;
    }

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

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

    .page-dangnhap__game-title {
      font-size: 1.3em;
      color: var(--primary-color);
      padding: 15px 10px;
      margin-bottom: 0;
    }

    /* FAQ Section Styles */
    .page-dangnhap__faq-section {
      background-color: var(--text-light);
      border-radius: 10px;
      box-shadow: 0 4px 15px var(--shadow-light);
      padding: 30px;
      margin-top: 40px;
    }

    .page-dangnhap__faq-item {
      border-bottom: 1px solid var(--border-color);
      margin-bottom: 15px;
    }

    .page-dangnhap__faq-item:last-child {
      border-bottom: none;
      margin-bottom: 0;
    }

    .page-dangnhap__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      padding: 15px 0;
      font-size: 1.2em;
      color: var(--text-dark);
      font-weight: bold;
      user-select: none;
      transition: color 0.3s ease;
    }

    .page-dangnhap__faq-question h3 {
      margin: 0;
      flex-grow: 1;
      pointer-events: none; /* Prevent h3 from blocking click event */
      color: var(--text-dark); /* Ensure good contrast */
    }

    .page-dangnhap__faq-question:hover {
      color: var(--primary-color);
    }

    .page-dangnhap__faq-toggle {
      font-size: 1.5em;
      font-weight: bold;
      color: var(--primary-color);
      margin-left: 15px;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click event */
    }

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

    .page-dangnhap__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 15px;
      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(--text-dark);
    }

    .page-dangnhap__faq-item.active .page-dangnhap__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px 15px !important;
      opacity: 1;
    }

    .page-dangnhap__faq-answer p {
      margin-top: 0;
      margin-bottom: 1em;
    }

    .page-dangnhap__faq-answer ul {
      margin-left: 20px;
      margin-bottom: 1em;
    }

    .page-dangnhap__faq-answer li {
      margin-bottom: 0.5em;
    }

    /* Floating Ad */
    .page-dangnhap__floating-ad {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--primary-color);
      color: var(--text-light);
      padding: 15px 20px;
      border-radius: 10px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
      z-index: 1000;
      display: flex;
      align-items: center;
      gap: 10px;
      transition: transform 0.3s ease;
    }

    .page-dangnhap__floating-ad:hover {
      transform: translateY(-5px);
    }

    .page-dangnhap__floating-ad-text {
      font-size: 1.1em;
      font-weight: bold;
    }

    .page-dangnhap__floating-ad-button {
      background-color: var(--secondary-color);
      color: var(--text-dark);
      padding: 8px 15px;
      border-radius: 20px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease;
      border: none;
      cursor: pointer;
    }

    .page-dangnhap__floating-ad-button:hover {
      background-color: #fdd85d;
    }

    /* Responsive adjustments */
    @media (max-width: 992px) {
      .page-dangnhap__hero-title {
        font-size: 2.8em;
      }
      .page-dangnhap__hero-subtitle {
        font-size: 1.3em;
      }
      .page-dangnhap__heading {
        font-size: 2em;
      }
      .page-dangnhap__sub-heading {
        font-size: 1.6em;
      }
      .page-dangnhap__game-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      }
    }

    @media (max-width: 768px) {
      .page-dangnhap {
        padding-top: calc(var(--header-offset, 122px) - 20px); /* Adjust for smaller screens */
      }
      .page-dangnhap__section {
        padding: 30px 15px;
      }
      .page-dangnhap__section--hero {
        padding: 60px 15px;
        padding-top: calc(60px + 10px);
      }
      .page-dangnhap__hero-title {
        font-size: 2.2em;
      }
      .page-dangnhap__hero-subtitle {
        font-size: 1.1em;
      }
      .page-dangnhap__cta-button {
        padding: 12px 25px;
        font-size: 1em;
      }
      .page-dangnhap__heading {
        font-size: 1.8em;
        margin-bottom: 30px;
      }
      .page-dangnhap__sub-heading {
        font-size: 1.4em;
      }
      .page-dangnhap__text-content {
        font-size: 1em;
      }
      .page-dangnhap__steps-list {
        grid-template-columns: 1fr; /* Stack items on mobile */
        gap: 20px;
      }
      .page-dangnhap__step-item {
        padding: 20px;
      }
      .page-dangnhap__game-grid {
        grid-template-columns: 1fr; /* Stack items on mobile */
        gap: 20px;
      }
      .page-dangnhap__faq-question {
        font-size: 1.1em;
        padding: 12px 0;
      }
      .page-dangnhap__faq-answer {
        padding: 15px 10px;
      }
      .page-dangnhap__floating-ad {
        bottom: 15px;
        right: 15px;
        padding: 12px 15px;
        flex-direction: column;
        text-align: center;
        width: calc(100% - 30px);
        max-width: 300px;
      }
      .page-dangnhap__floating-ad-text {
        font-size: 0.95em;
        margin-bottom: 5px;
      }
      .page-dangnhap__floating-ad-button {
        padding: 6px 12px;
        font-size: 0.9em;
      }

      /* List item responsive specific styles */
      .page-dangnhap__steps-list,
      .page-dangnhap__game-grid,
      .page-dangnhap__faq-section {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 0 !important;
        padding-right: 0 !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }

      .page-dangnhap__step-item,
      .page-dangnhap__game-card,
      .page-dangnhap__faq-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding-left: 15px !important;
        padding-right: 15px !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
      }

      .page-dangnhap__image-wrapper {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 10px !important;
        padding-right: 10px !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }

      .page-dangnhap__image {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
    }

    @media (max-width: 480px) {
      .page-dangnhap__hero-title {
        font-size: 1.8em;
      }
      .page-dangnhap__hero-subtitle {
        font-size: 1em;
      }
      .page-dangnhap__heading {
        font-size: 1.5em;
      }
      .page-dangnhap__cta-button {
        padding: 10px 20px;
        font-size: 0.9em;
      }
    }