:root {
    --primary-color: #017439; /* Dark Green */
    --secondary-color: #FFFFFF; /* White */
    --accent-color-register-login: #C30808; /* Red */
    --accent-text-register-login: #FFFF00; /* Yellow */
    --text-dark: #333333;
    --text-light: #ffffff;
    --border-light: #e0e0e0;
    --background-light: #f9f9f9;
}

.page-download {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark); /* Default text color for light body background */
    background-color: var(--secondary-color); /* Body background is white */
}

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

.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;
    line-height: 1.3;
}

.page-download__section-intro {
    font-size: 18px;
    color: var(--text-dark);
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.page-download__dark-section {
    background-color: var(--primary-color);
    color: var(--text-light);
}

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

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

.page-download__hero-section {
    position: relative;
    padding: 80px 20px; /* Default padding for desktop */
    padding-top: var(--header-offset, 120px); /* Ensure content is below fixed header */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.page-download__hero-container {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    max-width: 1200px;
    margin: 0 auto;
    gap: 40px;
}

.page-download__hero-content {
    flex: 1;
    text-align: left;
    max-width: 600px;
}

.page-download__hero-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-light); /* On dark background */
    line-height: 1.2;
}

.page-download__hero-description {
    font-size: 20px;
    margin-bottom: 30px;
    color: var(--text-light); /* On dark background */
    line-height: 1.5;
}

.page-download__hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 500px;
}

.page-download__hero-image img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 12px;
    object-fit: contain;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.page-download__cta-buttons {
    display: flex;
    gap: 15px;
    justify-content: flex-start; /* Align left with content */
    margin-top: 30px;
}

.page-download__cta-center .page-download__cta-buttons {
    justify-content: center;
}

.page-download__cta-button {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 18px;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.3s ease;
    text-align: center;
    max-width: 100%;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
}

.page-download__cta-button--primary {
    background-color: var(--accent-color-register-login); /* Red for download */
    color: var(--accent-text-register-login); /* Yellow text for contrast */
    border: 2px solid var(--accent-color-register-login);
}

.page-download__cta-button--primary:hover {
    background-color: #e02a2a;
    border-color: #e02a2a;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-download__cta-button--secondary {
    background-color: var(--secondary-color);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.page-download__cta-button--secondary:hover {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

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

.page-download__card {
    background: var(--background-light);
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 450px; /* Ensure cards have similar height */
}

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

.page-download__card img {
    width: 100%;
    max-width: 300px; /* Constrain image size within card */
    height: auto;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
}

.page-download__card-title {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-weight: 600;
}

.page-download__card p {
    font-size: 16px;
    color: var(--text-dark);
    flex-grow: 1; /* Allow paragraph to take available space */
}

.page-download__how-to-download {
    background-color: var(--primary-color);
    color: var(--text-light);
}

.page-download__how-to-download .page-download__section-title {
    color: var(--text-light);
}

.page-download__step-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-download__step-item {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 500px; /* Ensure step items have similar height */
}

.page-download__step-item img {
    width: 100%;
    max-width: 400px;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    margin-bottom: 20px;
}

.page-download__step-title {
    font-size: 22px;
    color: var(--text-light);
    margin-bottom: 15px;
    font-weight: 600;
}

.page-download__step-item p {
    font-size: 16px;
    color: var(--text-light);
    flex-grow: 1;
}

.page-download__cta-center {
    text-align: center;
    margin-top: 50px;
}

.page-download__features .page-download__feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-download__feature-item {
    background: var(--background-light);
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
    text-align: center;
    min-height: 380px; /* Ensure feature items have similar height */
}

.page-download__feature-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
}

.page-download__feature-item img {
    width: 100%;
     /* Smaller images for features */
    height: auto;
    object-fit: contain;
    margin-bottom: 15px;
}

.page-download__feature-title {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-weight: 600;
}

.page-download__feature-item p {
    font-size: 15px;
    color: var(--text-dark);
}

.page-download__faq {
    background-color: var(--background-light);
    padding-bottom: 80px;
}

.page-download__faq-list {
    max-width: 900px;
    margin: 40px auto 0;
}

/* FAQ容器样式 */
.page-download__faq-item {
    margin-bottom: 15px;
    border-radius: 8px;
    overflow: hidden;
    background-color: var(--secondary-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

/* 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 20px;
    opacity: 0;
}

/* FAQ展开状态 - 🚨 Sử dụng!important và đủ lớn max-height để đảm bảo nó có thể mở rộng */
.page-download__faq-item.active .page-download__faq-answer {
    max-height: 2000px !important; /* 🚨 Sử dụng!important để đảm bảo quyền ưu tiên, giá trị đủ lớn để chứa mọi nội dung */
    padding: 20px !important;
    opacity: 1;
    background: #fdfdfd;
    border-top: 1px solid var(--border-light);
}

/* Question styles */
.page-download__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 20px;
    background: var(--secondary-color);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    cursor: pointer;
    user-select: none;
    transition: background-color 0.3s ease, border-color 0.3s ease;
    position: relative;
    color: var(--text-dark);
}

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

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

/* Question title styles */
.page-download__faq-question h3 {
    margin: 0;
    padding: 0;
    flex: 1;
    font-size: 17px;
    font-weight: 600;
    line-height: 1.5;
    pointer-events: none; /* Prevent h3 from blocking click event */
    text-align: left;
    color: var(--primary-color);
}

/* Toggle icon */
.page-download__faq-toggle {
    font-size: 24px;
    font-weight: bold;
    line-height: 1;
    color: var(--primary-color);
    transition: transform 0.3s ease, color 0.3s ease;
    flex-shrink: 0;
    margin-left: 15px;
    pointer-events: none; /* Prevent icon from blocking click event */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
}

.page-download__faq-item.active .page-download__faq-toggle {
    color: var(--accent-color-register-login);
    transform: rotate(45deg); /* Change to X when active */
}

.page-download__cta-final {
    padding: 80px 20px;
}

/* Global image responsive styles */
.page-download img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* --- Responsive Design --- */
@media (max-width: 1024px) {
    .page-download__hero-container {
        flex-direction: column;
        gap: 30px;
    }

    .page-download__hero-content {
        text-align: center;
        max-width: 100%;
    }

    .page-download__cta-buttons {
        justify-content: center;
    }

    .page-download__hero-image {
        max-width: 70%;
    }

    .page-download__section-title {
        font-size: 32px;
    }

    .page-download__section-intro {
        font-size: 17px;
    }
}

@media (max-width: 768px) {
    .page-download__hero-section {
        padding-top: var(--header-offset, 120px) !important; /* Mobile specific padding-top */
        padding-bottom: 40px;
        padding-left: 15px;
        padding-right: 15px;
    }

    .page-download__hero-title {
        font-size: 36px;
    }

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

    .page-download__cta-buttons {
        flex-direction: column;
        gap: 10px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        padding: 0 15px;
    }

    .page-download__cta-button {
        width: 100% !important;
        max-width: 100% !important;
        padding: 12px 20px;
        font-size: 16px;
        white-space: normal !important;
        word-wrap: break-word !important;
        box-sizing: border-box !important;
    }

    .page-download__section {
        padding: 40px 0;
    }

    .page-download__section-title {
        font-size: 28px;
    }

    .page-download__section-intro {
        font-size: 16px;
    }

    .page-download__card {
        padding: 20px;
        min-height: 400px;
    }
    
    .page-download__card img {
        max-width: 250px;
    }

    .page-download__card-title {
        font-size: 20px;
    }

    .page-download__step-item {
        padding: 20px;
        min-height: 450px;
    }

    .page-download__step-title {
        font-size: 20px;
    }

    .page-download__feature-item {
        padding: 20px;
        min-height: 350px;
    }

    .page-download__feature-title {
        font-size: 18px;
    }

    /* 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;
    }

    /* Ensure all content containers are responsive */
    .page-download__container,
    .page-download__grid,
    .page-download__step-grid,
    .page-download__feature-grid,
    .page-download__faq-list {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }

    /* Images within content sections */
    .page-download img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
    }
}