/**
 * SPORTNEWS - Main CSS
 * Mobile-first responsive design
 * Tối ưu cho Core Web Vitals
 */

/* ============================================
   CSS VARIABLES (Design Tokens)
   ============================================ */
:root {
    /* Colors */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-secondary: #64748b;
    --color-accent: #f59e0b;

    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-text-muted: #94a3b8;

    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-card: #ffffff;

    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;

    /* Container */
    --container-max: 1200px;
    --container-padding: var(--space-4);
}

/* ============================================
   RESET & BASE
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.main-content {
    min-height: calc(100vh - 200px);
    padding: var(--space-8) 0;
}

/* ============================================
   HEADER
   ============================================ */
.site-header {
    background: linear-gradient(135deg, #1a2a4a, #2d3a52);
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.main-nav {
    display: flex;
    gap: var(--space-6);
}

.main-nav a {
    color: rgba(255, 255, 255, 0.85);
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.main-nav a:hover {
    color: white;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    text-decoration: none;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-main {
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: white;
    letter-spacing: -0.5px;
}

.logo-tagline {
    font-size: 10px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 1.5px;
    text-transform: uppercase;


    /* ============================================
   HERO SECTION (HOME)
   ============================================ */
    .hero-section {
        text-align: center;
        padding: var(--space-10) 0;
        background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
        border-radius: var(--radius-xl);
        margin-bottom: var(--space-10);
    }

    .hero-title {
        font-size: var(--font-size-3xl);
        font-weight: 700;
        color: var(--color-text);
        margin-bottom: var(--space-3);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
        color: var(--color-text-light);
        max-width: 600px;
        margin: 0 auto;
    }

    /* ============================================
   NEWS GROUPS (HOME)
   ============================================ */
    .news-group {
        margin-bottom: var(--space-12);
    }

    .group-title {
        display: flex;
        align-items: center;
        gap: var(--space-3);
        font-size: var(--font-size-2xl);
        font-weight: 700;
        color: var(--color-text);
        margin-bottom: var(--space-6);
        padding-bottom: var(--space-3);
        border-bottom: 2px solid var(--color-primary);
    }

    .group-icon {
        font-size: var(--font-size-2xl);
    }

    /* ============================================
   ARTICLES GRID
   ============================================ */
    .articles-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    @media (min-width: 640px) {
        .articles-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }

    @media (min-width: 1024px) {
        .articles-grid {
            grid-template-columns: repeat(4, 1fr);
        }
    }

    /* ============================================
   ARTICLE CARD
   ============================================ */
    .article-card {
        background: var(--color-bg-card);
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    }

    .article-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-lg);
    }

    .article-link {
        display: block;
        color: inherit;
    }

    .article-image-wrapper {
        aspect-ratio: 16 / 10;
        overflow: hidden;
        background: var(--color-bg-alt);
    }

    .article-image {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform var(--transition-normal);
    }

    .article-card:hover .article-image {
        transform: scale(1.05);
    }

    .article-content {
        padding: var(--space-4);
    }

    .article-title {
        font-size: var(--font-size-base);
        font-weight: 600;
        color: var(--color-text);
        line-height: 1.4;
        margin-bottom: var(--space-2);
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .article-date {
        font-size: var(--font-size-xs);
        color: var(--color-text-muted);
    }

    /* ============================================
   ARTICLE PAGE
   ============================================ */
    .article-page {
        max-width: 800px;
        margin: 0 auto;
    }

    .article-header {
        margin-bottom: var(--space-6);
    }

    .article-page-title {
        font-size: var(--font-size-3xl);
        font-weight: 700;
        color: var(--color-text);
        line-height: 1.3;
        margin-bottom: var(--space-4);
    }

    @media (min-width: 768px) {
        .article-page-title {
            font-size: var(--font-size-4xl);
        }
    }

    .article-meta {
        display: flex;
        align-items: center;
        gap: var(--space-4);
        color: var(--color-text-light);
        font-size: var(--font-size-sm);
    }

    .article-featured-image {
        margin-bottom: var(--space-8);
        border-radius: var(--radius-lg);
        overflow: hidden;
    }

    .featured-img {
        width: 100%;
        height: auto;
    }

    .article-summary {
        font-size: var(--font-size-lg);
        color: var(--color-text-light);
        padding: var(--space-6);
        background: var(--color-bg-alt);
        border-left: 4px solid var(--color-primary);
        border-radius: var(--radius-md);
        margin-bottom: var(--space-8);
    }

    .article-body {
        font-size: var(--font-size-lg);
        line-height: 1.8;
        color: var(--color-text);
    }

    .article-body p {
        margin-bottom: var(--space-6);
    }

    .article-body img {
        border-radius: var(--radius-md);
        margin: var(--space-8) 0;
    }

    .article-body h2,
    .article-body h3 {
        margin-top: var(--space-10);
        margin-bottom: var(--space-4);
        font-weight: 700;
    }

    .article-body h2 {
        font-size: var(--font-size-2xl);
    }

    .article-body h3 {
        font-size: var(--font-size-xl);
    }

    .article-body a {
        color: var(--color-primary);
        text-decoration: underline;
    }

    .article-body ul,
    .article-body ol {
        margin-bottom: var(--space-6);
        padding-left: var(--space-6);
    }

    .article-body li {
        margin-bottom: var(--space-2);
    }

    /* ============================================
   SHARE BUTTONS
   ============================================ */
    .share-buttons {
        display: flex;
        align-items: center;
        gap: var(--space-4);
        padding: var(--space-6) 0;
        margin-top: var(--space-8);
        border-top: 1px solid var(--color-border);
    }

    .share-label {
        font-weight: 600;
        color: var(--color-text);
    }

    .share-btn {
        display: inline-flex;
        align-items: center;
        padding: var(--space-2) var(--space-4);
        border-radius: var(--radius-md);
        font-size: var(--font-size-sm);
        font-weight: 500;
        color: white;
        transition: opacity var(--transition-fast);
    }

    .share-btn:hover {
        opacity: 0.9;
        color: white;
    }

    .share-facebook {
        background: #1877f2;
    }

    .share-twitter {
        background: #1da1f2;
    }

    /* ============================================
   AD CONTAINERS
   ============================================ */
    .ad-container {
        margin: var(--space-6) 0;
        padding: var(--space-4);
        background: var(--color-bg-alt);
        border-radius: var(--radius-md);
        text-align: center;
        min-height: 100px;
    }

    .ad-before-title {
        margin-bottom: var(--space-6);
    }

    .ad-after-title {
        margin-top: var(--space-4);
        margin-bottom: var(--space-6);
    }

    .ad-mid-content {
        margin: var(--space-8) 0;
    }

    .ad-end-content {
        margin-top: var(--space-8);
    }

    /* ============================================
   ERROR PAGE
   ============================================ */
    .error-page {
        text-align: center;
        padding: var(--space-12) 0;
    }

    .error-icon {
        font-size: 4rem;
        margin-bottom: var(--space-6);
    }

    .error-title {
        font-size: var(--font-size-3xl);
        font-weight: 700;
        color: var(--color-text);
        margin-bottom: var(--space-4);
    }

    .error-message {
        font-size: var(--font-size-lg);
        color: var(--color-text-light);
        margin-bottom: var(--space-8);
    }

    .btn-home {
        display: inline-flex;
        align-items: center;
        padding: var(--space-3) var(--space-6);
        background: var(--color-primary);
        color: white;
        border-radius: var(--radius-md);
        font-weight: 500;
        transition: background var(--transition-fast);
    }

    .btn-home:hover {
        background: var(--color-primary-dark);
        color: white;
    }

    /* ============================================
   FOOTER
   ============================================ */
    .site-footer {
        background: var(--color-bg-alt);
        border-top: 1px solid var(--color-border);
        padding: var(--space-8) 0;
        margin-top: var(--space-12);
    }

    .footer-links {
        display: flex;
        justify-content: center;
        gap: var(--space-6);
        margin-bottom: var(--space-4);
        flex-wrap: wrap;
    }

    .footer-links a {
        color: var(--color-text-light);
        font-size: var(--font-size-sm);
    }

    .footer-links a:hover {
        color: var(--color-primary);
    }

    .copyright {
        text-align: center;
        font-size: var(--font-size-sm);
        color: var(--color-text-muted);
    }

    /* ============================================
   NO CONTENT
   ============================================ */
    .no-content {
        text-align: center;
        padding: var(--space-12) 0;
        color: var(--color-text-light);
    }

    /* ============================================
   STATIC PAGES
   ============================================ */
    .static-page {
        max-width: 800px;
        margin: 0 auto;
    }

    .static-page h1 {
        font-size: var(--font-size-3xl);
        font-weight: 700;
        margin-bottom: var(--space-8);
    }

    .static-page h2 {
        font-size: var(--font-size-xl);
        font-weight: 600;
        margin-top: var(--space-8);
        margin-bottom: var(--space-4);
    }

    .static-page p {
        margin-bottom: var(--space-4);
        color: var(--color-text-light);
    }

    /* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */
    @media (max-width: 640px) {
        :root {
            --container-padding: var(--space-4);
        }

        .main-nav {
            gap: var(--space-4);
        }

        .main-nav a {
            font-size: var(--font-size-xs);
        }

        .hero-title {
            font-size: var(--font-size-2xl);
        }

        .hero-subtitle {
            font-size: var(--font-size-base);
        }

        .group-title {
            font-size: var(--font-size-xl);
        }

        .article-page-title {
            font-size: var(--font-size-2xl);
        }
    }

    /* ============================================
   SECOND ARTICLE (BÀI VIẾT THỨ 2 - EXPANDABLE)
   ============================================ */
    .second-article-wrapper {
        margin-top: var(--space-10);
    }

    /* Nút Continue Reading - Bo tròn góc đẹp */
    .btn-continue {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: var(--space-3);
        width: 100%;
        padding: 18px 32px;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        border: none;
        border-radius: 50px;
        /* Bo tròn hoàn toàn */
        font-family: var(--font-family);
        font-size: var(--font-size-lg);
        font-weight: 600;
        cursor: pointer;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
        text-transform: uppercase;
        letter-spacing: 1px;
    }

    .btn-continue:hover {
        transform: translateY(-3px);
        box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
        background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    }

    .btn-continue:active {
        transform: translateY(-1px);
        box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    }

    .btn-continue-icon {
        width: 20px;
        height: 20px;
        transition: transform 0.3s ease;
    }

    .btn-continue:hover .btn-continue-icon {
        transform: translateY(3px);
    }

    /* Bài viết thứ 2 */
    .second-article {
        animation: slideDown 0.5s ease-out;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-30px);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .second-article-divider {
        height: 3px;
        background: linear-gradient(90deg, transparent, #667eea, #764ba2, transparent);
        margin: var(--space-10) 0;
        border-radius: 2px;
    }

    .second-article-header {
        margin-top: var(--space-6);
    }

    .second-title {
        font-size: var(--font-size-2xl);
        color: #764ba2;
    }

    @media (min-width: 768px) {
        .second-title {
            font-size: var(--font-size-3xl);
        }

        .btn-continue {
            width: auto;
            min-width: 300px;
            margin: 0 auto;
            display: flex;
        }
    }
}

/* ============================================
   HOME PAGE
   ============================================ */
.home-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.hero-banner {
    margin-bottom: 40px;
}

.hero-grid-5 {
    display: grid;
    gap: 15px;
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .hero-grid-5 {
        grid-template-columns: 1fr 1fr;
        align-items: stretch;
    }
}

.hero-grid-5 .hero-main {
    border-radius: 12px;
    overflow: hidden;
}

.hero-grid-5 .hero-main a {
    display: block;
}

.hero-grid-5 .hero-main .hero-image-wrap {
    aspect-ratio: 1/1;
}

@media (min-width: 768px) {
    .hero-grid-5 .hero-main .hero-image-wrap {
        aspect-ratio: 1/1;
    }
}

.hero-grid-5 .hero-main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.hero-grid-5 .hero-main:hover img {
    transform: scale(1.03);
}

.hero-side-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.hero-side-item {
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.hero-side-item a {
    display: block;
}

.hero-side-item .hero-image-wrap {
    aspect-ratio: 16/10;
}

.hero-side-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.hero-side-item:hover img {
    transform: scale(1.05);
}

.hero-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 12px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
}

.hero-caption span {
    font-size: 12px;
    font-weight: 600;
    line-height: 1.3;
}

.news-section {
    margin-bottom: 50px;
}

.section-header {
    border-bottom: 3px solid #667eea;
    padding-bottom: 12px;
    margin-bottom: 25px;
}

.section-title {
    font-size: 22px;
    font-weight: 700;
    color: #1e293b;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

@media (min-width: 768px) {
    .news-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .news-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.news-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid #f1f5f9;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.news-card a {
    display: block;
    text-decoration: none;
    color: inherit;
}

.news-card-img {
    aspect-ratio: 16/10;
    overflow: hidden;
}

.news-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.news-card:hover .news-card-img img {
    transform: scale(1.05);
}

.news-card-body {
    padding: 15px;
}

.news-card-body h3 {
    font-size: 15px;
    font-weight: 600;
    line-height: 1.4;
    color: #1e293b;
    margin-bottom: 8px;
}

.news-card-body time {
    font-size: 12px;
    color: #94a3b8;
}

.no-content {
    text-align: center;
    padding: 60px 20px;
    color: #64748b;
}

/* ============================================
   STATIC PAGES (Contact, Terms, Privacy)
   ============================================ */
.static-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.static-page h1 {
    font-size: 32px;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 3px solid #667eea;
}

.static-page h2 {
    font-size: 22px;
    font-weight: 600;
    color: #334155;
    margin-top: 30px;
    margin-bottom: 15px;
}

.static-page h3 {
    font-size: 18px;
    font-weight: 600;
    color: #475569;
    margin-top: 25px;
    margin-bottom: 12px;
}

.static-page h4 {
    font-size: 16px;
    font-weight: 600;
    color: #64748b;
    margin-top: 20px;
    margin-bottom: 10px;
}

.static-page p {
    font-size: 16px;
    line-height: 1.8;
    color: #475569;
    margin-bottom: 16px;
}

.static-page ul {
    margin: 16px 0;
    padding-left: 24px;
}

.static-page li {
    font-size: 16px;
    line-height: 1.8;
    color: #475569;
    margin-bottom: 10px;
}

.static-page a {
    color: #667eea;
    text-decoration: underline;
}

.static-page a:hover {
    color: #764ba2;
}

.contact-section,
.terms-section,
.privacy-section {
    margin-bottom: 30px;
}

.contact-info {
    background: #f8fafc;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    border-left: 4px solid #667eea;
}

.contact-info h3 {
    margin-top: 0;
    color: #667eea;
}

.contact-form-placeholder {
    background: #f1f5f9;
    padding: 20px;
    border-radius: 8px;
    margin-top: 20px;
    text-align: center;
}

.copyright-note {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #e2e8f0;
    font-size: 14px;
    color: #94a3b8;
    text-align: center;
}
/* ============================================
   FOOTER
   ============================================ */
.site-footer {
    background: #1e293b;
    padding: 30px 0;
    margin-top: 50px;
}

.site-footer .container {
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 25px;
    flex-wrap: wrap;
    margin-bottom: 15px;
}

.footer-links a {
    color: rgba(255,255,255,0.8);
    font-size: 14px;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: white;
}

.site-footer .copyright {
    color: rgba(255,255,255,0.6);
    font-size: 14px;
    margin: 0;
}

/* ============================================
   BUTTON CONTINUE READING
   ============================================ */
.btn-continue {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 18px 32px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 50px;
    font-family: inherit;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 30px 0;
}

.btn-continue:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
    background: linear-gradient(135deg, #764ba2, #667eea);
}

.btn-continue:active {
    transform: translateY(-1px);
}

.btn-continue-icon {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
}

.btn-continue:hover .btn-continue-icon {
    transform: translateY(3px);
}

/* Second Article */
.second-article-wrapper {
    margin-top: 30px;
}

.second-article-divider {
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    margin: 30px 0;
    border-radius: 2px;
}

.second-article-header {
    margin-bottom: 20px;
}

.second-title {
    font-size: 28px;
    color: #1e293b;
}

/* ============================================
   ARTICLE PAGE TYPOGRAPHY (Style: Medium/Editorial)
   ============================================ */

/* Container cho article */
.article-page .container {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Article Header */
.article-header {
    margin-bottom: 24px;
}

/* Title - Large and Bold */
.article-page-title {
    font-size: 32px;
    line-height: 1.25;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

@media (min-width: 768px) {
    .article-page-title {
        font-size: 42px;
        line-height: 1.2;
    }
}

/* Article Meta (date, author) */
.article-meta {
    font-size: 14px;
    color: #6b6b6b;
    margin-bottom: 20px;
}

/* Featured Image */
.article-featured-image {
    margin: 24px 0;
}

.featured-img {
    width: 100%;
    height: auto;
    border-radius: 4px;
}

/* Article Summary/Intro */
.article-summary {
    font-size: 20px;
    line-height: 1.6;
    color: #4a4a4a;
    font-weight: 400;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e6e6e6;
}

/* Article Body - Main Content Typography */
.article-body {
    font-size: 19px;
    line-height: 1.75;
    color: #292929;
    letter-spacing: -0.003em;
}

.article-body p {
    margin-bottom: 28px;
}

.article-body h2 {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.3;
    color: #1a1a1a;
    margin-top: 40px;
    margin-bottom: 16px;
}

.article-body h3 {
    font-size: 22px;
    font-weight: 600;
    line-height: 1.35;
    color: #1a1a1a;
    margin-top: 32px;
    margin-bottom: 12px;
}

.article-body h4 {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
    margin-top: 24px;
    margin-bottom: 10px;
}

/* Lists */
.article-body ul,
.article-body ol {
    margin-bottom: 28px;
    padding-left: 24px;
}

.article-body li {
    margin-bottom: 12px;
    line-height: 1.7;
}

/* Blockquote */
.article-body blockquote {
    font-size: 21px;
    font-style: italic;
    line-height: 1.6;
    color: #555;
    border-left: 4px solid #e6e6e6;
    padding-left: 24px;
    margin: 32px 0;
}

/* Images trong n?i dung */
.article-body img {
    width: 100%;
    height: auto;
    margin: 28px 0;
    border-radius: 4px;
}

/* Links */
.article-body a {
    color: #2563eb;
    text-decoration: underline;
}

.article-body a:hover {
    color: #1d4ed8;
}

/* Second Article Title */
.second-title {
    font-size: 28px;
    line-height: 1.25;
    color: #1a1a1a;
}

@media (min-width: 768px) {
    .second-title {
        font-size: 36px;
    }
}

/* ============================================
   MOBILE RESPONSIVE FIX - No Horizontal Scroll
   ============================================ */

/* Prevent horizontal overflow */
html, body {
    overflow-x: hidden;
    width: 100%;
}

.container {
    width: 100%;
    max-width: 100%;
    padding-left: 16px;
    padding-right: 16px;
    overflow-x: hidden;
}

/* Article page mobile fixes */
.article-page {
    overflow-x: hidden;
}

.article-page .container {
    max-width: 100%;
    padding: 0 16px;
}

@media (min-width: 768px) {
    .article-page .container {
        max-width: 720px;
        padding: 0 24px;
    }
}

/* Title responsive */
.article-page-title {
    font-size: 26px;
    line-height: 1.3;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

@media (min-width: 768px) {
    .article-page-title {
        font-size: 38px;
    }
}

/* Article body responsive */
.article-body {
    font-size: 17px;
    line-height: 1.7;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

@media (min-width: 768px) {
    .article-body {
        font-size: 19px;
        line-height: 1.75;
    }
}

.article-body p {
    margin-bottom: 24px;
}

/* Images không vu?t quá container */
.article-body img,
.featured-img,
img {
    max-width: 100%;
    height: auto;
}

/* Fix any wide elements */
.article-body iframe,
.article-body video,
.article-body table {
    max-width: 100%;
    overflow-x: auto;
}

/* Summary responsive */
.article-summary {
    font-size: 17px;
    line-height: 1.6;
}

@media (min-width: 768px) {
    .article-summary {
        font-size: 20px;
    }
}

/* Meta date styling */
.article-meta {
    color: #666;
    font-size: 14px;
    margin-bottom: 16px;
}

.article-date {
    color: #2563eb;
}

/* ============================================
   USER CUSTOM TYPOGRAPHY (Override)
   ============================================ */

/* H1 Title */
.article-page-title,
.article-page h1,
h1 {
    font-size: 1.5rem !important;
    font-weight: 700 !important;
    line-height: 1.3;
}

/* Paragraph */
.article-body p,
.article-summary p,
p {
    font-size: 24px !important;
    line-height: 1.6;
    margin-bottom: 24px;
}