:root {
    --primary-color: #26A9E0;
    --secondary-color: #FFFFFF;
    --text-dark: #333333;
    --text-light: #ffffff;
    --button-login-color: #EA7C07;
    --background-color: #FFFFFF;
    --black-color: #000000;
    /* Header offset from shared.css */
}

/* Base styles for the download page */
.page-download {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark); /* Default text color for light background */
    background: var(--background-color); /* Default background color */
}

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

.page-download__section {
    padding: 60px 0;
    text-align: center;
}

.page-download__section-title {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 20px;
    font-weight: bold;
}

.page-download__section-intro {
    font-size: 18px;
    max-width: 800px;
    margin: 0 auto 40px auto;
    line-height: 1.8;
}

/* Hero Section */
.page-download__hero-section {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 20px;
    padding-top: var(--header-offset, 120px); /* Ensure space below fixed header */
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-light); /* Light text on gradient background */
}

.page-download__hero-container {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.page-download__hero-title {
    font-size: 48px;
    margin-bottom: 20px;
    line-height: 1.2;
    color: var(--text-light);
    font-weight: 800;
}

.page-download__hero-description {
    font-size: 22px;
    margin-bottom: 40px;
    max-width: 900px;
    color: var(--text-light);
}

.page-download__hero-image {
    width: 100%;
    margin-bottom: 30px;
}

.page-download__hero-image img {
    width: 100%;
    height: auto;
    max-width: 100%;
    display: block;
    border-radius: 8px;
    object-fit: cover;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.page-download__cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 20px;
    width: 100%; /* Ensure container takes full width for responsive wrapping */
    box-sizing: border-box;
}

.page-download__cta-button {
    display: inline-block;
    padding: 15px 40px;
    background: var(--button-login-color); /* Use login color for CTA for prominence */
    color: var(--text-light);
    text-decoration: none;
    border-radius: 8px;
    font-size: 20px;
    font-weight: bold;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    white-space: normal; /* Allow text to wrap */
    word-wrap: break-word; /* Allow long words to break */
    max-width: 250px; /* Limit individual button width */
    width: 100%;
    box-sizing: border-box;
}

.page-download__cta-button:hover {
    background: #D56B00; /* Darkened version of #EA7C07 */
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Why App Section */
.page-download__why-app-section {
    background: var(--background-color);
    color: var(--text-dark);
    padding-bottom: 80px;
}

.page-download__features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-download__feature-card {
    background: var(--secondary-color);
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    padding: 30px;
    text-align: left;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    color: var(--text-dark);
}

.page-download__feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.page-download__feature-title {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-weight: 700;
}

.page-download__feature-card p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-dark);
}

.page-download__content-image {
    margin-top: 50px;
    border-radius: 10px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    max-width: 100%;
    height: auto;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

/* Guide Section */
.page-download__guide-section {
    background: var(--primary-color); /* Darker background for contrast */
    color: var(--text-light);
    padding: 80px 0;
}

.page-download__guide-section .page-download__section-title {
    color: var(--text-light);
}

.page-download__guide-section .page-download__section-intro {
    color: var(--text-light);
}

.page-download__guide-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
    gap: 15px;
}

.page-download__tab-button {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    padding: 12px 30px;
    border-radius: 5px;
    color: var(--text-light);
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-sizing: border-box;
    white-space: nowrap;
}

.page-download__tab-button:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.page-download__tab-button--active {
    background: var(--secondary-color);
    color: var(--primary-color);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.page-download__tab-content {
    display: none;
    background: var(--secondary-color);
    color: var(--text-dark);
    padding: 40px;
    border-radius: 10px;
    text-align: left;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.page-download__tab-content--active {
    display: block;
}

.page-download__guide-subtitle {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 25px;
    font-weight: 700;
}

.page-download__guide-list {
    list-style: decimal;
    padding-left: 25px;
    margin-bottom: 30px;
}

.page-download__guide-list li {
    margin-bottom: 15px;
    font-size: 17px;
    line-height: 1.7;
}

.page-download__guide-list li strong {
    color: var(--button-login-color); /* Use login color for step numbers */
}

/* Requirements Section */
.page-download__requirements-section {
    background: var(--background-color);
    color: var(--text-dark);
    padding-bottom: 80px;
}

.page-download__requirements-list {
    list-style: none;
    padding: 0;
    max-width: 600px;
    margin: 40px auto 0 auto;
    text-align: left;
}

.page-download__requirements-list li {
    background: #f9f9f9;
    border-left: 5px solid var(--primary-color);
    padding: 15px 20px;
    margin-bottom: 15px;
    border-radius: 5px;
    font-size: 17px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.page-download__requirements-list li strong {
    color: var(--primary-color);
}

/* FAQ Section */
.page-download__faq-section {
    background: #f5f5f5; /* Light grey background for FAQ */
    color: var(--text-dark);
    padding-bottom: 80px;
}

.page-download__faq-list {
    max-width: 800px;
    margin: 40px auto 0 auto;
    text-align: left;
}

/* FAQ容器样式 */
.page-download__faq-item {
  margin-bottom: 15px;
  border-radius: 5px;
  overflow: hidden;
}

/* FAQ默认状态 - 答案隐藏 */
.page-download__faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
  padding: 0 15px;
  opacity: 0;
}

/* FAQ展开状态 - 🚨 使用!important和足够大的max-height确保一定能展开 */
.page-download__faq-item.active .page-download__faq-answer {
  max-height: 2000px !important; /* 🚨 Sử dụng !important để đảm bảo ưu tiên, giá trị đủ lớn để chứa mọi nội dung */
  padding: 20px 15px !important;
  opacity: 1;
  background: #f9f9f9;
  border-radius: 0 0 5px 5px;
}

/* Vấn đề kiểu dáng */
.page-download__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 5px;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  position: relative;
}

.page-download__faq-question:hover {
  background: #f5f5f5;
  border-color: #d0d0d0;
}

.page-download__faq-question:active {
  background: #eeeeee;
}

/* Vấn đề tiêu đề kiểu dáng */
.page-download__faq-question h3 {
  margin: 0;
  padding: 0;
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  pointer-events: none; /* Ngăn thẻ h3 chặn sự kiện nhấp */
  color: var(--text-dark);
}

/* Chuyển đổi biểu tượng */
.page-download__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  line-height: 1;
  color: var(--primary-color); /* Sử dụng màu chính cho biểu tượng chuyển đổi */
  transition: color 0.3s ease;
  flex-shrink: 0;
  margin-left: 15px;
  pointer-events: none; /* Ngăn biểu tượng chặn sự kiện nhấp */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
}

.page-download__faq-item.active .page-download__faq-toggle {
  color: var(--button-login-color); /* Thay đổi màu khi hoạt động */
}

.page-download__faq-answer p {
    color: var(--text-dark);
    font-size: 16px;
    line-height: 1.7;
}

.page-download__faq-answer a {
    color: var(--primary-color);
    text-decoration: underline;
}

.page-download__faq-answer a:hover {
    color: #1a7bb0; /* Slightly darker primary color */
}

/* Bottom CTA Section */
.page-download__cta-bottom-section {
    background: var(--primary-color);
    color: var(--text-light);
    padding: 80px 0;
    text-align: center;
}

.page-download__cta-bottom-content {
    max-width: 900px;
}

.page-download__cta-bottom-section .page-download__section-title {
    color: var(--text-light);
    margin-bottom: 25px;
}

.page-download__cta-bottom-section .page-download__section-intro {
    color: var(--text-light);
    margin-bottom: 40px;
}

.page-download__cta-button--large {
    padding: 18px 50px;
    font-size: 22px;
    max-width: 350px;
    width: 100%;
}

/* Dark background sections for contrast */
.page-download__dark-section {
    background: var(--primary-color);
    color: var(--text-light);
}

.page-download__dark-section .page-download__section-title,
.page-download__dark-section .page-download__section-intro,
.page-download__dark-section h3 {
    color: var(--text-light);
}


/* Responsive Design */
@media (max-width: 1024px) {
    .page-download__hero-title {
        font-size: 42px;
    }
    .page-download__hero-description {
        font-size: 20px;
    }
    .page-download__section-title {
        font-size: 32px;
    }
    .page-download__guide-subtitle {
        font-size: 26px;
    }
}

@media (max-width: 768px) {
    /* Mobile specific padding for main content areas */
    .page-download__section,
    .page-download__container,
    .page-download__features-grid,
    .page-download__faq-list,
    .page-download__cta-bottom-content {
        padding-left: 15px !important;
        padding-right: 15px !important;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
    }

    .page-download__hero-section {
        padding-top: var(--header-offset, 120px) !important; /* Mobile header offset */
        padding-bottom: 40px;
    }

    .page-download__hero-title {
        font-size: 32px;
        margin-bottom: 15px;
    }

    .page-download__hero-description {
        font-size: 18px;
        margin-bottom: 30px;
    }

    /* Images responsiveness */
    .page-download img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }

    /* Buttons responsiveness */
    .page-download__cta-buttons {
        flex-direction: column; /* Stack buttons vertically */
        gap: 15px;
        align-items: center;
    }

    .page-download__cta-button,
    .page-download__cta-button--large,
    .page-download__tab-button,
    .page-download__btn-primary,
    .page-download__btn-secondary,
    .page-download a[class*="button"],
    .page-download a[class*="btn"] {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    
    .page-download__tab-button {
        flex: 1; /* Allow tab buttons to share space */
        min-width: unset;
        font-size: 16px;
        padding: 10px 15px;
    }
    .page-download__guide-tabs {
        flex-wrap: wrap !important;
        gap: 10px;
    }

    .page-download__section-title {
        font-size: 28px;
    }
    .page-download__section-intro {
        font-size: 16px;
        margin-bottom: 30px;
    }
    .page-download__feature-title {
        font-size: 20px;
    }
    .page-download__feature-card {
        padding: 20px;
    }
    .page-download__guide-subtitle {
        font-size: 22px;
    }
    .page-download__guide-list li {
        font-size: 16px;
    }
    .page-download__tab-content {
        padding: 25px;
    }

    /* FAQ Mobile */
    .page-download__faq-question {
      padding: 15px;
      flex-wrap: wrap;
    }
    
    .page-download__faq-question h3 {
      font-size: 15px;
      margin-bottom: 0;
      width: calc(100% - 40px);
    }
    
    .page-download__faq-toggle {
      margin-left: 10px;
      width: 24px;
      height: 24px;
      font-size: 20px;
    }
    
    .page-download__faq-answer {
      padding: 0 15px;
    }
    
    .page-download__faq-item.active .page-download__faq-answer {
      padding: 15px !important;
    }
}