/* style/blog-article-9.css */

/* Biến CSS */
:root {
    --page-blog-article-9-primary-color: #003366; /* Deep Sea Blue */
    --page-blog-article-9-accent-color: #FFD700; /* Gold */
    --page-blog-article-9-cta-color: #DC143C; /* Crimson Red */
    --page-blog-article-9-text-dark: #333333; /* Dark Gray for text on light background */
    --page-blog-article-9-text-light: #ffffff; /* White for text on dark background */
    --page-blog-article-9-bg-light: #f8f8f8; /* Light background */
    --page-blog-article-9-bg-dark: #002244; /* Dark background for contrast */
    --page-blog-article-9-border-color: #e0e0e0;
}

.page-blog-article-9 {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--page-blog-article-9-text-dark);
    background-color: var(--page-blog-article-9-bg-light);
    padding: 20px 0;
}

.page-blog-article-9__container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: var(--page-blog-article-9-text-light);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    border-radius: 8px;
}

.page-blog-article-9__back-link {
    display: inline-block;
    margin-bottom: 20px;
    color: var(--page-blog-article-9-primary-color);
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease;
}

.page-blog-article-9__back-link:hover {
    color: var(--page-blog-article-9-accent-color);
}

.page-blog-article-9__header {
    text-align: center;
    margin-bottom: 40px;
}

.page-blog-article-9__title {
    font-size: 2.5em; /* H1 */
    color: var(--page-blog-article-9-primary-color);
    margin-bottom: 15px;
    line-height: 1.2;
}

.page-blog-article-9__meta {
    font-size: 0.9em;
    color: #666;
    margin-bottom: 20px;
}

.page-blog-article-9__hero-image {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    border-radius: 8px;
    margin-top: 20px;
}

.page-blog-article-9__section {
    margin-bottom: 30px;
}

.page-blog-article-9__subtitle {
    font-size: 2em; /* H2 */
    color: var(--page-blog-article-9-primary-color);
    margin-top: 30px;
    margin-bottom: 15px;
    border-bottom: 2px solid var(--page-blog-article-9-accent-color);
    padding-bottom: 10px;
}

.page-blog-article-9__heading3 {
    font-size: 1.5em; /* H3 */
    color: var(--page-blog-article-9-primary-color);
    margin-top: 25px;
    margin-bottom: 10px;
}

.page-blog-article-9__heading4 {
    font-size: 1.25em; /* H4 */
    color: var(--page-blog-article-9-primary-color);
    margin-top: 20px;
    margin-bottom: 8px;
}

.page-blog-article-9 p {
    font-size: 1.1em; /* 16-18px range, 1.1em ~ 17.6px assuming 16px base */
    margin-bottom: 1.5em; /* Paragraph spacing */
    line-height: 1.7;
    color: var(--page-blog-article-9-text-dark);
}

.page-blog-article-9__highlight {
    color: var(--page-blog-article-9-primary-color);
    font-weight: bold;
}

.page-blog-article-9__image-center {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 1em auto 2em auto; /* 1em vertical spacing */
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.page-blog-article-9__list-ordered,
.page-blog-article-9__list-unordered {
    margin: 1.5em 0;
    padding-left: 25px;
}

.page-blog-article-9__list-ordered li,
.page-blog-article-9__list-unordered li {
    font-size: 1.1em;
    margin-bottom: 0.8em;
    line-height: 1.6;
    color: var(--page-blog-article-9-text-dark);
}

.page-blog-article-9__list-unordered li::before {
    content: '•';
    color: var(--page-blog-article-9-accent-color);
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
}

.page-blog-article-9__btn {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s ease, color 0.3s ease, transform 0.2s ease;
    font-size: 1.1em;
    text-align: center;
    cursor: pointer;
    margin-top: 20px;
}

.page-blog-article-9__btn--primary {
    background-color: var(--page-blog-article-9-cta-color); /* Crimson Red */
    color: var(--page-blog-article-9-text-light);
    border: 2px solid var(--page-blog-article-9-cta-color);
}

.page-blog-article-9__btn--primary:hover {
    background-color: #a00d2e;
    border-color: #a00d2e;
    transform: translateY(-2px);
}

.page-blog-article-9__btn--secondary {
    background-color: var(--page-blog-article-9-primary-color); /* Deep Sea Blue */
    color: var(--page-blog-article-9-text-light);
    border: 2px solid var(--page-blog-article-9-primary-color);
}

.page-blog-article-9__btn--secondary:hover {
    background-color: #001a33;
    border-color: #001a33;
    transform: translateY(-2px);
}

.page-blog-article-9__cta-text {
    text-align: center;
    margin-top: 30px;
    font-size: 1.2em;
    font-style: italic;
    color: var(--page-blog-article-9-primary-color);
}

.page-blog-article-9__link {
    color: var(--page-blog-article-9-primary-color);
    text-decoration: underline;
}

.page-blog-article-9__link:hover {
    color: var(--page-blog-article-9-accent-color);
}

.page-blog-article-9__related-articles {
    margin-top: 50px;
    border-top: 1px solid var(--page-blog-article-9-border-color);
    padding-top: 30px;
}

.page-blog-article-9__list-related {
    list-style: none;
    padding: 0;
    margin-top: 20px;
}

.page-blog-article-9__list-related li {
    margin-bottom: 10px;
}

.page-blog-article-9__list-related li a {
    color: var(--page-blog-article-9-primary-color);
    text-decoration: none;
    font-weight: normal;
    font-size: 1.05em;
}

.page-blog-article-9__list-related li a:hover {
    color: var(--page-blog-article-9-accent-color);
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .page-blog-article-9__title {
        font-size: 2em;
    }

    .page-blog-article-9__subtitle {
        font-size: 1.8em;
    }

    .page-blog-article-9__heading3 {
        font-size: 1.3em;
    }

    .page-blog-article-9 p,
    .page-blog-article-9__list-ordered li,
    .page-blog-article-9__list-unordered li {
        font-size: 1em;
    }

    .page-blog-article-9__btn {
        padding: 10px 20px;
        font-size: 1em;
    }

    .page-blog-article-9__container {
        padding: 15px;
    }
}

@media (max-width: 480px) {
    .page-blog-article-9__title {
        font-size: 1.8em;
    }

    .page-blog-article-9__subtitle {
        font-size: 1.6em;
    }

    .page-blog-article-9__heading3 {
        font-size: 1.2em;
    }

    .page-blog-article-9 p {
        font-size: 0.95em;
    }

    .page-blog-article-9__hero-image {
        max-height: 250px;
    }

    .page-blog-article-9__btn {
        display: block;
        width: 100%;
        margin-left: auto;
        margin-right: auto;
    }
}

/* Ensure contrast for text on primary/accent colors */
.page-blog-article-9__highlight,
.page-blog-article-9__link {
    /* Ensure these are readable on the light background */
    color: var(--page-blog-article-9-primary-color);
}

/* Example of a blockquote style with good contrast */
.page-blog-article-9 blockquote {
    border-left: 5px solid var(--page-blog-article-9-accent-color);
    background-color: #f0f8ff; /* A very light blue, close to white but distinct */
    padding: 15px 20px;
    margin: 20px 0;
    font-style: italic;
    color: var(--page-blog-article-9-text-dark);
    border-radius: 4px;
}

.page-blog-article-9 code {
    font-family: 'Courier New', monospace;
    background-color: #eee;
    padding: 2px 4px;
    border-radius: 3px;
    color: var(--page-blog-article-9-primary-color);
}