/* Reset và biến cơ bản */
    :root {
      --primary-color: #e44d26; /* Màu cam đỏ */
      --secondary-color: #333;
      --accent-color: #f0ad4e; /* Màu vàng */
      --background-dark: #1a1a1a;
      --background-light: #2c2c2c;
      --text-color-light: #f0f0f0;
      --text-color-dark: #ccc;
      --border-color: #444;
      --button-hover-color: #ff6a42;
      --button-active-color: #c93d1f;
      --spacing-unit: 16px;
    }

    .page-ku-web {
      font-family: 'Arial', sans-serif;
      color: var(--text-color-light);
      background-color: var(--background-dark);
      line-height: 1.6;
      padding-top: var(--header-offset, 122px); /* Fallback for header offset */
    }

    /* Hero Section */
    .page-ku-web__hero-section {
      text-align: center;
      padding: 60px 20px;
      background: linear-gradient(135deg, var(--background-dark) 0%, var(--background-light) 100%);
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

    .page-ku-web__hero-section::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: url('[GALLERY:pattern:1920x1080:abstract,geometric]');
      background-size: cover;
      opacity: 0.1;
      z-index: 0;
    }

    .page-ku-web__hero-content {
      position: relative;
      z-index: 1;
      max-width: 900px;
      margin: 0 auto;
    }

    .page-ku-web__hero-title {
      font-size: 3.2em;
      color: var(--primary-color);
      margin-bottom: 15px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
      font-weight: bold;
    }

    .page-ku-web__hero-subtitle {
      font-size: 1.5em;
      color: var(--text-color-light);
      margin-bottom: 30px;
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-ku-web__hero-image {
      width: 100%;
      max-width: 800px;
      height: auto;
      border-radius: 15px;
      margin-top: 40px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
      display: block;
      margin-left: auto;
      margin-right: auto;
      object-fit: cover;
    }

    /* Floating Buttons */
    .page-ku-web__floating-buttons {
      position: fixed;
      bottom: 20px;
      right: 20px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 1000;
    }

    .page-ku-web__button {
      background-color: var(--primary-color);
      color: var(--text-color-light);
      padding: 12px 25px;
      border: none;
      border-radius: 30px;
      font-size: 1.1em;
      font-weight: bold;
      cursor: pointer;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      transition: background-color 0.3s ease, transform 0.2s ease;
      text-align: center;
      text-decoration: none; /* Ensure no underline */
      display: inline-block; /* For proper padding and sizing */
    }

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

    .page-ku-web__button:active {
      background-color: var(--button-active-color);
      transform: translateY(0);
    }

    /* Section styling */
    .page-ku-web__section {
      padding: 60px 20px;
      max-width: 1200px;
      margin: 0 auto;
      border-bottom: 1px solid var(--border-color);
    }

    .page-ku-web__section:last-of-type {
      border-bottom: none;
    }

    .page-ku-web__section-title {
      font-size: 2.5em;
      color: var(--primary-color);
      text-align: center;
      margin-bottom: 40px;
      position: relative;
      padding-bottom: 15px;
    }

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

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

    /* Game Categories */
    .page-ku-web__game-categories {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-ku-web__category-item {
      background-color: var(--background-light);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
      padding-bottom: 20px;
      display: flex;
      flex-direction: column;
      box-sizing: border-box; /* Crucial for list item responsiveness */
    }

    .page-ku-web__category-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    }

    .page-ku-web__category-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      margin-bottom: 15px;
      transition: transform 0.3s ease;
    }

    .page-ku-web__category-item:hover .page-ku-web__category-image {
      transform: scale(1.03);
    }

    .page-ku-web__category-title {
      font-size: 1.6em;
      color: var(--primary-color);
      margin-bottom: 10px;
      padding: 0 15px;
    }

    .page-ku-web__category-description {
      font-size: 1em;
      color: var(--text-color-dark);
      padding: 0 15px;
      flex-grow: 1; /* Allow description to take available space */
    }

    /* Promotions Section */
    .page-ku-web__promotions-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-ku-web__promotion-card {
      background-color: var(--background-light);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 5px 20px 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; /* Crucial for list item responsiveness */
    }

    .page-ku-web__promotion-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    }

    .page-ku-web__promotion-image {
      width: 100%;
      height: 220px;
      object-fit: cover;
      margin-bottom: 15px;
      transition: transform 0.3s ease;
    }

    .page-ku-web__promotion-card:hover .page-ku-web__promotion-image {
      transform: scale(1.03);
    }

    .page-ku-web__promotion-title {
      font-size: 1.8em;
      color: var(--accent-color);
      margin-bottom: 10px;
      padding: 0 15px;
    }

    .page-ku-web__promotion-description {
      font-size: 1em;
      color: var(--text-color-dark);
      padding: 0 15px;
    }

    /* Features Section */
    .page-ku-web__features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-ku-web__feature-item {
      background-color: var(--background-light);
      border-radius: 10px;
      padding: 30px;
      text-align: center;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
      transition: transform 0.3s ease, background-color 0.3s ease;
      box-sizing: border-box; /* Crucial for list item responsiveness */
    }

    .page-ku-web__feature-item:hover {
      transform: translateY(-5px);
      background-color: #3a3a3a;
    }

    .page-ku-web__feature-icon {
      width: 80px;
      height: 80px;
      margin-bottom: 20px;
      object-fit: contain;
    }

    .page-ku-web__feature-title {
      font-size: 1.5em;
      color: var(--primary-color);
      margin-bottom: 10px;
    }

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

    /* FAQ Section */
    .page-ku-web__faq-container {
      margin-top: 40px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

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

    .page-ku-web__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      background-color: #3a3a3a;
      cursor: pointer;
      user-select: none;
      transition: background-color 0.3s ease;
    }

    .page-ku-web__faq-question:hover {
      background-color: #4a4a4a;
    }

    .page-ku-web__faq-question h3 {
      margin: 0;
      font-size: 1.3em;
      color: var(--text-color-light);
      pointer-events: none; /* Prevent h3 from blocking click event */
    }

    .page-ku-web__faq-toggle {
      font-size: 1.8em;
      font-weight: bold;
      color: var(--accent-color);
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle icon from blocking click event */
    }

    .page-ku-web__faq-item.active .page-ku-web__faq-toggle {
      transform: rotate(45deg); /* Change + to X (or rotate to make it look like -) */
    }

    .page-ku-web__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      opacity: 0;
      color: var(--text-color-dark);
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      font-size: 1em;
    }

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

    /* Call to Action */
    .page-ku-web__cta-section {
      text-align: center;
      padding: 60px 20px;
      background-color: var(--primary-color);
      border-top: 1px solid var(--border-color);
    }

    .page-ku-web__cta-title {
      font-size: 2.5em;
      color: var(--text-color-light);
      margin-bottom: 20px;
    }

    .page-ku-web__cta-text {
      font-size: 1.2em;
      color: var(--text-color-light);
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Responsive adjustments */
    @media (max-width: 1024px) {
      .page-ku-web__hero-title {
        font-size: 2.8em;
      }
      .page-ku-web__hero-subtitle {
        font-size: 1.3em;
      }
      .page-ku-web__section-title {
        font-size: 2em;
      }
      .page-ku-web__game-categories,
      .page-ku-web__promotions-grid,
      .page-ku-web__features-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      }
    }

    @media (max-width: 768px) {
      .page-ku-web {
        padding-top: var(--header-offset, 80px); /* Adjust for smaller header on mobile */
      }
      .page-ku-web__hero-section {
        padding: 40px 15px;
      }
      .page-ku-web__hero-title {
        font-size: 2.2em;
      }
      .page-ku-web__hero-subtitle {
        font-size: 1.1em;
      }
      .page-ku-web__section {
        padding: 40px 15px;
      }
      .page-ku-web__section-title {
        font-size: 1.8em;
        margin-bottom: 30px;
      }
      .page-ku-web__text-content {
        font-size: 1em;
      }
      .page-ku-web__floating-buttons {
        bottom: 15px;
        right: 15px;
        flex-direction: row; /* Horizontal on mobile */
        width: calc(100% - 30px);
        justify-content: space-around;
      }
      .page-ku-web__button {
        flex: 1;
        padding: 10px 15px;
        font-size: 1em;
        border-radius: 25px;
      }
      .page-ku-web__game-categories,
      .page-ku-web__promotions-grid,
      .page-ku-web__features-grid {
        grid-template-columns: 1fr; /* Single column on mobile */
        gap: 20px;
      }

      /* List item specific mobile responsive requirements */
      .page-ku-web__game-categories > *,
      .page-ku-web__promotions-grid > *,
      .page-ku-web__features-grid > * {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding-left: 15px !important; /* Adjust padding to fit screen */
        padding-right: 15px !important; /* Adjust padding to fit screen */
      }
      .page-ku-web__game-categories,
      .page-ku-web__promotions-grid,
      .page-ku-web__features-grid {
        padding: 0 15px !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
      }

      .page-ku-web__category-description,
      .page-ku-web__promotion-description,
      .page-ku-web__feature-description,
      .page-ku-web__faq-answer p {
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
      }

      .page-ku-web__faq-question {
        padding: 15px 20px;
      }
      .page-ku-web__faq-question h3 {
        font-size: 1.1em;
      }
      .page-ku-web__faq-answer {
        padding: 0 20px;
      }
      .page-ku-web__faq-item.active .page-ku-web__faq-answer {
        padding: 15px 20px !important;
      }
      .page-ku-web__cta-title {
        font-size: 2em;
      }
      .page-ku-web__cta-text {
        font-size: 1em;
      }
    }

    @media (max-width: 480px) {
      .page-ku-web__hero-title {
        font-size: 1.8em;
      }
      .page-ku-web__hero-subtitle {
        font-size: 0.9em;
      }
      .page-ku-web__button {
        font-size: 0.9em;
        padding: 8px 12px;
      }
      .page-ku-web__floating-buttons {
        gap: 8px;
        bottom: 10px;
        right: 10px;
        width: calc(100% - 20px);
      }
    }