/* ==========================================
   BLOG TIN TỨC & DỊCH VỤ - LAYOUT 2 CỘT
   ASP.NET Core MVC 8
   ========================================== */

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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #f97316;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #f3f4f6;
    --white: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --radius: 8px;
    --transition: all 0.3s ease;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

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

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

ul, ol {
    list-style: none;
}

/* === CONTAINER === */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* === HEADER === */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-top {
    background: var(--primary-color);
    color: var(--white);
    padding: 8px 0;
    font-size: 0.875rem;
}

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

.header-top-left {
    display: flex;
    gap: 20px;
}

.header-top-left span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.header-top-right {
    display: flex;
    gap: 12px;
}

.header-top-right a {
    color: var(--white);
    font-size: 1rem;
}

.header-top-right a:hover {
    opacity: 0.8;
}

.header-main {
    padding: 15px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 50px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-text span {
    color: var(--secondary-color);
}

.search-box {
    display: flex;
    max-width: 400px;
    flex: 1;
    margin: 0 30px;
}

.search-box input {
    flex: 1;
    padding: 10px 15px;
    border: 2px solid var(--border-color);
    border-right: none;
    border-radius: var(--radius) 0 0 var(--radius);
    outline: none;
    font-size: 0.95rem;
}

.search-box input:focus {
    border-color: var(--primary-color);
}

.search-box button {
    padding: 10px 20px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 0 var(--radius) var(--radius) 0;
    cursor: pointer;
    transition: var(--transition);
}

.search-box button:hover {
    background: var(--primary-dark);
}

.hotline {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--secondary-color);
    font-weight: 600;
}

.hotline-icon {
    width: 45px;
    height: 45px;
    background: var(--secondary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.hotline-text small {
    display: block;
    color: var(--text-light);
    font-weight: 400;
    font-size: 0.8rem;
}

.hotline-text strong {
    font-size: 1.2rem;
}

/* === NAVIGATION === */
.nav {
    background: var(--primary-color);
}

.nav-menu {
    display: flex;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 15px 20px;
    color: var(--white);
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover,
.nav-item.active .nav-link {
    background: var(--primary-dark);
}

.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--white);
    box-shadow: var(--shadow-lg);
    border-radius: 0 0 var(--radius) var(--radius);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 100;
}

.nav-item:hover .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-dropdown a {
    display: block;
    padding: 12px 20px;
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color);
}

.nav-dropdown a:last-child {
    border-bottom: none;
}

.nav-dropdown a:hover {
    background: var(--bg-color);
    color: var(--primary-color);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    padding: 10px;
    background: transparent;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
}

/* === MAIN LAYOUT 2 CỘT === */
.main-content {
    padding: 30px 0;
}

.two-column-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 30px;
}

/* === CONTENT AREA (Cột trái) === */
.content-area {
    min-width: 0;
}

/* === SIDEBAR (Cột phải) === */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

/* === WIDGET BOX === */
.widget {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.widget-title {
    background: var(--primary-color);
    color: var(--white);
    padding: 12px 20px;
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.widget-content {
    padding: 15px;
}

/* === CATEGORY WIDGET === */
.category-list li {
    border-bottom: 1px dashed var(--border-color);
}

.category-list li:last-child {
    border-bottom: none;
}

.category-list a {
    display: flex;
    align-items: center;
    padding: 10px 0;
    color: var(--text-color);
}

.category-list a::before {
    content: "›";
    margin-right: 10px;
    color: var(--primary-color);
    font-weight: bold;
}

.category-list a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

/* === NEWS WIDGET === */
.news-widget-item {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.news-widget-item:last-child {
    border-bottom: none;
}

.news-widget-thumb {
    width: 80px;
    height: 60px;
    flex-shrink: 0;
    border-radius: 4px;
    overflow: hidden;
}

.news-widget-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-widget-info h4 {
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: 5px;
}

.news-widget-info h4 a:hover {
    color: var(--primary-color);
}

.news-widget-info time {
    font-size: 0.75rem;
    color: var(--text-light);
}

/* === CONTACT WIDGET === */
.contact-widget p {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.contact-widget p:last-child {
    margin-bottom: 0;
}

.contact-widget i {
    color: var(--primary-color);
    width: 20px;
    flex-shrink: 0;
}

/* === BANNER WIDGET === */
.banner-widget img {
    width: 100%;
    border-radius: var(--radius);
    transition: var(--transition);
}

.banner-widget a:hover img {
    transform: scale(1.02);
}

/* === ARTICLE CARD === */
.article-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: 25px;
}

.article-featured {
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.article-thumb {
    position: relative;
    overflow: hidden;
}

.article-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.article-category {
    position: absolute;
    top: 15px;
    left: 15px;
    background: var(--secondary-color);
    color: var(--white);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.article-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.article-meta {
    display: flex;
    gap: 15px;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 10px;
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.article-title {
    font-size: 1.3rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 12px;
}

.article-title a:hover {
    color: var(--primary-color);
}

.article-excerpt {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.btn-readmore {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
}

.btn-readmore:hover {
    color: var(--primary-dark);
    gap: 12px;
}

/* === ARTICLE GRID === */
.article-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.article-grid .article-card {
    margin-bottom: 0;
}

.article-grid .article-card .article-thumb {
    height: 180px;
}

.article-grid .article-card .article-body {
    padding: 15px;
}

.article-grid .article-card .article-title {
    font-size: 1rem;
}

/* === SERVICE CARD === */
.service-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.service-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-thumb {
    height: 200px;
    overflow: hidden;
}

.service-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.service-card:hover .service-thumb img {
    transform: scale(1.08);
}

.service-body {
    padding: 20px;
    text-align: center;
}

.service-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.service-excerpt {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.btn-service {
    display: inline-block;
    padding: 10px 25px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 25px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
}

.btn-service:hover {
    background: var(--primary-dark);
}

/* === SECTION TITLE === */
.section-title {
    display: flex;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 12px;
    border-bottom: 3px solid var(--primary-color);
}

.section-title h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title .view-all {
    margin-left: auto;
    color: var(--text-light);
    font-size: 0.9rem;
}

.section-title .view-all:hover {
    color: var(--primary-color);
}

/* === BREADCRUMB === */
.breadcrumb {
    background: var(--white);
    padding: 15px 0;
    margin-bottom: 25px;
    border-radius: var(--radius);
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

.breadcrumb-list li {
    display: flex;
    align-items: center;
    gap: 10px;
}

.breadcrumb-list li:not(:last-child)::after {
    content: "/";
    color: var(--text-light);
}

.breadcrumb-list a:hover {
    color: var(--primary-color);
}

.breadcrumb-list .current {
    color: var(--primary-color);
    font-weight: 500;
}

/* === PAGINATION === */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 30px;
}

.pagination a,
.pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 0.9rem;
    transition: var(--transition);
}

.pagination a:hover,
.pagination .active {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

/* === FOOTER === */
.footer {
    background: #1f2937;
    color: #d1d5db;
    padding-top: 50px;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}

.footer-about .logo {
    margin-bottom: 20px;
}

.footer-about .logo-text {
    color: var(--white);
}

.footer-about p {
    font-size: 0.9rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: var(--transition);
}

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

.footer-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 25px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary-color);
    display: inline-block;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a::before {
    content: "›";
    color: var(--primary-color);
}

.footer-links a:hover {
    color: var(--white);
    padding-left: 5px;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.footer-contact i {
    color: var(--primary-color);
    width: 20px;
    margin-top: 3px;
}

.footer-bottom {
    background: rgba(0,0,0,0.2);
    padding: 20px 0;
    text-align: center;
    font-size: 0.85rem;
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    .two-column-layout {
        grid-template-columns: 1fr 280px;
        gap: 25px;
    }
    
    .footer-main {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header-top {
        display: none;
    }
    
    .header-main .container {
        flex-wrap: wrap;
    }
    
    .search-box {
        order: 3;
        margin: 15px 0 0;
        max-width: 100%;
    }
    
    .hotline {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--primary-color);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        display: none;
    }
    
    .two-column-layout {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        order: 2;
    }
    
    .article-featured {
        grid-template-columns: 1fr;
    }
    
    .article-featured .article-thumb {
        height: 220px;
    }
    
    .article-grid {
        grid-template-columns: 1fr;
    }
    
    .service-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .footer-links a::before {
        display: none;
    }
    
    .footer-contact {
        text-align: left;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }
    
    .section-title h2 {
        font-size: 1.1rem;
    }
    
    .article-title {
        font-size: 1.1rem;
    }
    
    .widget-title {
        font-size: 0.9rem;
    }
}

/* === UTILITY CLASSES === */
.text-center { text-align: center; }
.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--secondary-color); }
.bg-primary { background-color: var(--primary-color); }
.bg-white { background-color: var(--white); }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }
.py-20 { padding-top: 20px; padding-bottom: 20px; }