* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {

    --primary-color: #5cae20;
    --primary-dark: #74d81d;
    --primary-light: #dbeafe;
    --secondary-color: #7c3aed;
    --accent-color: #0ea5e9;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;


    --text-color: #1f2937;
    --text-light: #6b7280;
    --text-lighter: #9ca3af;
    --text-white: #ffffff;

    --bg-color: #ffffff;
    --bg-light: #f9fafb;
    --bg-lighter: #f3f4f6;
    --bg-dark: #111827;


    --border-color: #e5e7eb;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-sm: 4px;


    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);


    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Mono', monospace;


    --container-width: 1200px;
    --header-height: 80px;
    --header-scroll-height: 70px;


    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;


    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
}

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

body {
    font-family: var(--font-sans);
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-color);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.line-clamp-1 {
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 1;
}

.line-clamp-2 {
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.line-clamp-3 {
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.line-clamp-4 {
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
}

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}


h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-md);
}

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

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

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

ul,
ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
}

li {
    margin-bottom: var(--spacing-xs);
}

blockquote {
    border-left: 4px solid var(--border-color);
    padding-left: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    font-style: italic;
    color: var(--text-light);
}

code {
    font-family: var(--font-mono);
    background-color: var(--bg-lighter);
    padding: 2px 6px;
    border-radius: var(--border-radius-sm);
    font-size: 0.9em;
}

pre {
    background-color: var(--bg-dark);
    color: var(--text-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin: var(--spacing-lg) 0;
}

pre code {
    background-color: transparent;
    padding: 0;
    color: inherit;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
}

th,
td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--bg-light);
    font-weight: 600;
}

tr:hover {
    background-color: var(--bg-lighter);
}


.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-left {
    text-align: left;
}

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-center {
    justify-content: center;
}

.gap-sm {
    gap: var(--spacing-sm);
}

.gap-md {
    gap: var(--spacing-md);
}

.gap-lg {
    gap: var(--spacing-lg);
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mt-xl {
    margin-top: var(--spacing-xl);
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mb-xl {
    margin-bottom: var(--spacing-xl);
}

.p-sm {
    padding: var(--spacing-sm);
}

.p-md {
    padding: var(--spacing-md);
}

.p-lg {
    padding: var(--spacing-lg);
}

.p-xl {
    padding: var(--spacing-xl);
}


.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: all var(--transition-normal);
    font-size: 0.95rem;
    gap: 8px;
    line-height: 1;
}

.btn svg {
    width: 16px;
    height: 16px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-white);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    color: var(--text-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--bg-color);
    color: var(--text-color);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--text-white);
}

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 12px 24px;
    font-size: 1rem;
}


.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    height: var(--header-height);
    transition: all var(--transition-normal);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0);
}

.main-header.scrolled {
    height: var(--header-scroll-height);
    box-shadow: var(--shadow-md);
    background-color: rgba(255, 255, 255, 0.98);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
    transition: height var(--transition-normal);
}

.main-header.scrolled .header-content {
    height: var(--header-scroll-height);
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.8rem;
}

.logo img {
    height: 40px;
    width: auto;
    transition: height var(--transition-normal);
}

.main-header.scrolled .logo img {
    height: 35px;
}


.main-nav {
    /* flex: 1; */
    display: flex;
    justify-content: center;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
    margin: 0;
    padding: 0;
}

.main-nav a {
    color: var(--text-color);
    font-weight: 500;
    position: relative;
    padding: 8px 0;
    font-size: 0.95rem;
}

.main-nav a:hover {
    color: var(--primary-color);
}

.main-nav a.active {
    color: var(--primary-color);
}

.main-nav a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    transform: scaleX(1);
    transition: transform var(--transition-normal);
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.main-nav a:hover::after {
    transform: scaleX(1);
}


.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.search-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-light);
    padding: 8px;
    border-radius: 50%;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.search-btn:hover {
    color: var(--primary-color);
    background-color: var(--bg-lighter);
}

.search-btn svg {
    width: 20px;
    height: 20px;
}


.hamburger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    position: relative;
    z-index: 1001;
}

.hamburger-menu span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--text-color);
    border-radius: 3px;
    transition: all var(--transition-normal);
}

.hamburger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger-menu.active span:nth-child(2) {
    opacity: 0;
}

.hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}


.main-content {
    margin-top: var(--header-height);
    padding: var(--spacing-2xl) 0;
    min-height: calc(100vh - var(--header-height) - 400px);
}


.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: 2.2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-color);
}

.section-subtitle {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}


.featured-section {
    /* padding: var(--spacing-3xl) 0 var(--spacing-2xl); */
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.featured-main {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.featured-card,
.news-card {
    background-color: var(--bg-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
}

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

.top-card {
    padding: 15px;
}

.card-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
}

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

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

.category-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    background-color: var(--primary-color);
    color: var(--text-white);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 2;
}

.card-content {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-content time {
    font-size: 0.9rem;
    color: var(--text-light);
    display: block;
    margin-bottom: var(--spacing-sm);
}

.card-content h3 {
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
    flex: 1;
}

.card-content h3 a {
    color: var(--text-color);
    display: block;
}

.card-content h3 a:hover {
    color: var(--primary-color);
}

.card-content p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-lighter);
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-md);
    margin-top: auto;
}

.latest-news {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-light);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.categories-section {
    padding: var(--spacing-3xl) 0;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.category-card {
    background-color: var(--bg-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    display: block;
    color: var(--text-color);
}

.category-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.category-icon {
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

.category-icon svg {
    width: 48px;
    height: 48px;
}

.category-card h3 {
    margin-bottom: var(--spacing-sm);
}

.category-card p {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
}

.article-count {
    display: inline-block;
    background-color: var(--bg-lighter);
    color: var(--text-light);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}


.editor-picks {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-light);
}

.editor-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.editor-large {
    grid-column: 1 / 3;
}

.editor-card {
    background-color: var(--bg-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.editor-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.editor-card .card-content {
    padding: 0;
}


.list-page {
    padding: var(--spacing-2xl) 0 var(--spacing-3xl);
}

.breadcrumb {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb ol {
    display: flex;
    list-style: none;
    align-items: center;
    margin-bottom: 0;
    padding: 0;
}

.breadcrumb li {
    margin-right: 5px;
    display: flex;
    align-items: center;
}

.breadcrumb li:not(:last-child)::after {
    content: "/";
    margin-left: 10px;
    color: var(--text-lighter);
}

.breadcrumb a {
    color: var(--text-light);
    font-size: 0.9rem;
    padding: 5px 8px;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.breadcrumb a:hover {
    color: var(--primary-color);
    background-color: var(--bg-lighter);
}

.breadcrumb a.current {
    color: var(--primary-color);
    font-weight: 600;
}

.breadcrumb-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.view-options,
.sort-options {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.view-label,
.sort-label {
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 500;
}

.view-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.view-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.view-btn.active {
    background-color: var(--primary-color);
    color: var(--text-white);
    border-color: var(--primary-color);
}

.view-btn svg {
    width: 18px;
    height: 18px;
}

.custom-select {
    position: relative;
    min-width: 150px;
}

.custom-select select {
    width: 100%;
    padding: 8px 35px 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 0.9rem;
    appearance: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.custom-select select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.select-arrow {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}

.select-arrow svg {
    width: 12px;
    height: 12px;
}


.page-header {
    margin-bottom: var(--spacing-2xl);
}

.page-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-color);
}

.page-subtitle {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 800px;
    margin-bottom: var(--spacing-lg);
}

.page-subtitle .article-count {
    margin-left: var(--spacing-sm);
}

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.filter-btn {
    display: inline-block;
    padding: 8px 16px;
    background-color: var(--bg-lighter);
    color: var(--text-color);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.filter-btn:hover {
    background-color: var(--border-color);
}

.filter-btn.active {
    background-color: var(--primary-color);
    color: var(--text-white);
}

.content-wrapper {
    display: grid;
    grid-template-columns: 70% 30%;
    gap: var(--spacing-2xl);
}


.content-main {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}


.list-card {
    background-color: var(--bg-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.list-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.featured-list-card {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.list-card-horizontal {
    display: grid;
    grid-template-columns: 200px 1fr;
}

.list-card-minimal {
    border-left: 3px solid var(--primary-color);
}

.list-card .card-image {
    aspect-ratio: 4/3;
}

.list-card-horizontal .card-image {
    aspect-ratio: 1/1;
}

.list-card .card-content {
    padding: var(--spacing-lg);
}

.list-card-minimal .card-content {
    padding: var(--spacing-lg);
}

.list-card .card-meta-top {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

.list-card h2,
.list-card h3 {
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.list-card h2 a,
.list-card h3 a {
    color: var(--text-color);
}

.list-card h2 a:hover,
.list-card h3 a:hover {
    color: var(--primary-color);
}

.list-card p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.list-card .card-meta-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-lighter);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-title {
    font-size: 0.8rem;
    color: var(--text-lighter);
}

.article-stats {
    display: flex;
    gap: var(--spacing-md);
}

.article-stats .stat {
    display: flex;
    align-items: center;
    gap: 5px;
}

.article-stats svg {
    width: 16px;
    height: 16px;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: var(--spacing-md);
}

.card-tags .tag {
    display: inline-block;
    padding: 4px 10px;
    background-color: var(--bg-lighter);
    color: var(--text-light);
    border-radius: 12px;
    font-size: 0.8rem;
    transition: all var(--transition-fast);
}

.card-tags .tag:hover {
    background-color: var(--border-color);
    color: var(--text-color);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}


.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.pagination-info {
    font-size: 0.9rem;
    color: var(--text-light);
}

.pagination-list {
    display: flex;
    list-style: none;
    gap: 5px;
    padding: 0;
    margin: 0;
}

.pagination-list li a,
.pagination-list li span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.pagination-list li a {
    color: var(--text-color);
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
}

.pagination-list li a:hover {
    background-color: var(--bg-lighter);
    border-color: var(--border-color);
}

.pagination-list li a.active {
    background-color: var(--primary-color);
    color: var(--text-white);
    border-color: var(--primary-color);
}

.pagination-list li a.active:hover {
    background-color: var(--primary-dark);
}

.pagination-ellipsis {
    color: var(--text-lighter);
    padding: 0 10px;
}

.pagination-prev a,
.pagination-next a {
    gap: 8px;
}

.pagination-prev a {
    padding-left: 15px;
}

.pagination-next a {
    padding-right: 15px;
}

.pagination-prev svg,
.pagination-next svg {
    width: 16px;
    height: 16px;
}


.detail-page {
    padding: var(--spacing-2xl) 0 var(--spacing-3xl);
}


.breadcrumb .reading-progress {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--text-light);
}

.progress-bar {
    width: 120px;
    height: 6px;
    background-color: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.progress-text {
    font-weight: 600;
    min-width: 30px;
}


.article-header {
    margin-bottom: var(--spacing-2xl);
}

.article-category {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.category-link {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.article-badge {
    display: inline-block;
    padding: 4px 12px;
    background-color: #fef3c7;
    color: #d97706;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

.article-title {
    font-size: 2.8rem;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.article-subtitle {
    font-size: 1.3rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-xl);
    line-height: 1.5;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-xl);
}

.author-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.author-avatar img {
    border-radius: 50%;
    object-fit: cover;
}

.author-details {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.author-name {
    font-weight: 600;
    font-size: 1.1rem;
}

.author-title {
    font-size: 0.9rem;
    color: var(--text-light);
}

.meta-details {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.meta-separator {
    color: var(--text-lighter);
}

.article-stats {
    display: flex;
    gap: var(--spacing-lg);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.stat-item svg {
    color: var(--text-light);
    width: 20px;
    height: 20px;
}

.stat-count {
    font-weight: 600;
    font-size: 1.1rem;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-light);
}


.featured-image {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    margin: var(--spacing-xl) 0;
}

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

.image-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: var(--text-white);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 0.9rem;
    opacity: 0.9;
}


.article-content {
    font-size: 1.1rem;
    line-height: 1.7;
}

.article-summary {
    margin: var(--spacing-xl) 0 var(--spacing-2xl);
}

.summary-box {
    background-color: var(--bg-light);
    border-left: 4px solid var(--primary-color);
    padding: var(--spacing-lg);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.summary-box h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.summary-box ul {
    list-style: none;
    padding-left: 0;
}

.summary-box li {
    position: relative;
    padding-left: 25px;
    margin-bottom: var(--spacing-sm);
    color: var(--text-light);
}

.summary-box li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.article-body h2 {
    font-size: 1.8rem;
    margin: var(--spacing-2xl) 0 var(--spacing-lg);
    color: var(--text-color);
}

.article-body h3 {
    font-size: 1.4rem;
    margin: var(--spacing-xl) 0 var(--spacing-md);
    color: var(--text-color);
}

.article-body p {
    margin-bottom: var(--spacing-lg);
    color: var(--text-color);
}

.article-body ul,
.article-body ol {
    margin: var(--spacing-lg) 0;
    padding-left: var(--spacing-xl);
}

.article-body li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-color);
}

.info-box {
    background-color: #f0f9ff;
    border-left: 4px solid var(--accent-color);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.info-box-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--accent-color);
}

.info-box-header svg {
    width: 20px;
    height: 20px;
}

.info-box-content p {
    margin-bottom: 0;
    color: var(--text-color);
}

.comparison-table {
    overflow-x: auto;
    margin: var(--spacing-xl) 0;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

.comparison-table th,
.comparison-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    background-color: var(--bg-light);
    font-weight: 600;
    color: var(--text-color);
}

.comparison-table tr:hover {
    background-color: var(--bg-lighter);
}

.comparison-table td:last-child {
    font-weight: 600;
    color: #059669;
}


.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.capability-item {
    text-align: center;
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: all var(--transition-normal);
}

.capability-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-sm);
}

.capability-icon {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.capability-icon svg {
    width: 32px;
    height: 32px;
}

.capability-item h4 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.capability-item p {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 0;
}


.article-quote {
    border-left: 4px solid var(--primary-color);
    padding: var(--spacing-lg) var(--spacing-xl);
    margin: var(--spacing-xl) 0;
    background-color: var(--bg-light);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    font-style: italic;
}

.article-quote p {
    font-size: 1.2rem;
    line-height: 1.6;
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
}

.article-quote footer {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: normal;
}

.code-block {
    background-color: #1f2937;
    border-radius: var(--border-radius);
    margin: var(--spacing-xl) 0;
    overflow: hidden;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background-color: #374151;
    color: #d1d5db;
    font-size: 0.9rem;
    font-family: monospace;
}

.copy-btn {
    background: none;
    border: none;
    color: #9ca3af;
    cursor: pointer;
    padding: 5px;
    border-radius: 4px;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.copy-btn:hover {
    color: var(--text-white);
    background-color: rgba(255, 255, 255, 0.1);
}

.copy-btn svg {
    width: 16px;
    height: 16px;
}

.code-block pre {
    margin: 0;
    padding: var(--spacing-lg);
    overflow-x: auto;
}

.code-block code {
    color: #e5e7eb;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.5;
}


.article-footer {
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-2xl);
    border-top: 1px solid var(--border-color);
}

.article-tags {
    margin-bottom: var(--spacing-2xl);
}

.article-tags h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.2rem;
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag-list .tag {
    display: inline-block;
    padding: 8px 16px;
    background-color: var(--bg-light);
    color: var(--text-color);
    border-radius: 20px;
    font-size: 0.9rem;
    transition: all var(--transition-normal);
}

.tag-list .tag:hover {
    background-color: var(--primary-color);
    color: var(--text-white);
}


.article-share {
    margin-bottom: var(--spacing-2xl);
}

.article-share h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.2rem;
}

.share-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.share-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.share-twitter:hover {
    background-color: #1da1f2;
    color: var(--text-white);
    border-color: #1da1f2;
}

.share-linkedin:hover {
    background-color: #0077b5;
    color: var(--text-white);
    border-color: #0077b5;
}

.share-facebook:hover {
    background-color: #1877f2;
    color: var(--text-white);
    border-color: #1877f2;
}

.share-copy:hover {
    background-color: var(--primary-color);
    color: var(--text-white);
    border-color: var(--primary-color);
}

.share-btn svg {
    width: 20px;
    height: 20px;
}


.author-card {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background-color: var(--bg-light);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-2xl);
}

.author-avatar-large img {
    border-radius: 50%;
    object-fit: cover;
}

.author-info-large {
    flex: 1;
}

.author-header {
    margin-bottom: var(--spacing-md);
}

.author-header h4 {
    margin-bottom: 5px;
    font-size: 1.3rem;
}

.author-role {
    font-size: 0.9rem;
    color: var(--text-light);
}

.author-info-large p {
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.author-links {
    display: flex;
    gap: var(--spacing-md);
}

.author-links a {
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 500;
}

.author-links a:hover {
    text-decoration: underline;
}


.article-navigation {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-3xl);
}

.nav-prev,
.nav-next {
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: all var(--transition-normal);
    display: block;
    color: var(--text-color);
}

.nav-prev:hover,
.nav-next:hover {
    border-color: var(--primary-color);
    background-color: var(--bg-light);
}

.nav-prev {
    text-align: left;
}

.nav-next {
    text-align: right;
}

.nav-label {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 5px;
}

.nav-title {
    font-weight: 600;
    color: var(--text-color);
}


.comments-section {
    margin-bottom: var(--spacing-3xl);
}

.comments-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.comments-header h3 {
    margin-bottom: 0;
    font-size: 1.5rem;
}

.comment-count {
    color: var(--text-light);
    font-weight: normal;
}


.comment-form {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-lg);
    background-color: var(--bg-light);
    border-radius: var(--border-radius);
}

.form-avatar img {
    border-radius: 50%;
    object-fit: cover;
}

.form-content {
    flex: 1;
}

.form-content textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
    transition: all var(--transition-fast);
    min-height: 100px;
}

.form-content textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-md);
}

.form-tips {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.85rem;
    color: var(--text-light);
}

.form-tips .tip {
    position: relative;
    padding-left: 20px;
}

.form-tips .tip:before {
    content: "ℹ️";
    position: absolute;
    left: 0;
}


.comments-list {
    margin-bottom: var(--spacing-xl);
}

.comment {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--border-color);
}

.comment:last-child {
    border-bottom: none;
}

.comment.reply {
    margin-left: 55px;
    padding: var(--spacing-lg) 0;
}

.comment-avatar img {
    border-radius: 50%;
    object-fit: cover;
}

.comment-content {
    flex: 1;
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.comment-author h5 {
    margin-bottom: 5px;
    font-size: 1rem;
}

.comment-time {
    font-size: 0.85rem;
    color: var(--text-light);
}

.comment-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.like-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 0.9rem;
    cursor: pointer;
    padding: 5px;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.like-btn:hover {
    color: var(--primary-color);
    background-color: var(--bg-lighter);
}

.like-btn.liked {
    color: var(--danger-color);
}

.like-btn svg {
    width: 16px;
    height: 16px;
}

.reply-btn {
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 0.9rem;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.reply-btn:hover {
    color: var(--primary-color);
    background-color: var(--bg-lighter);
}

.comment-body p {
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.comment-replies {
    margin-top: var(--spacing-lg);
}

.comments-load {
    text-align: center;
    margin-top: var(--spacing-xl);
}


.related-articles {
    margin-top: var(--spacing-3xl);
}

.related-articles h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xl);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.related-card {
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

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

.related-card .card-image {
    aspect-ratio: 4/3;
}

.related-card .card-content {
    padding: var(--spacing-lg);
}

.related-card h4 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
    line-height: 1.3;
}

.related-card h4 a {
    color: var(--text-color);
}

.related-card h4 a:hover {
    color: var(--primary-color);
}

.related-card p {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-card .card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-lighter);
}



.content-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.sidebar-widget {
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.widget-title {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-color);
}

.subscribe-widget {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-white);
}

.subscribe-widget .widget-title {
    color: var(--text-white);
}

.subscribe-widget p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
    font-size: 0.95rem;
}

.sidebar-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.sidebar-form input {
    padding: 12px 15px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.2);
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-white);
    font-size: 0.95rem;
}

.sidebar-form input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.sidebar-form input:focus {
    outline: none;
    border-color: var(--text-white);
    background-color: rgba(255, 255, 255, 0.15);
}

.widget-note {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: var(--spacing-sm);
    text-align: center;
}


.popular-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.popular-item {
    display: flex;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.popular-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.popular-rank {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 24px;
    background-color: var(--bg-lighter);
    color: var(--text-light);
    border-radius: 50%;
    font-size: 0.8rem;
    font-weight: 600;
}

.popular-item:nth-child(1) .popular-rank {
    background-color: #fef3c7;
    color: #d97706;
}

.popular-item:nth-child(2) .popular-rank {
    background-color: #e0e7ff;
    color: #4f46e5;
}

.popular-item:nth-child(3) .popular-rank {
    background-color: #fce7f3;
    color: #be185d;
}

.popular-content h4 {
    font-size: 0.95rem;
    margin-bottom: 5px;
    line-height: 1.3;
}

.popular-content h4 a {
    color: var(--text-color);
}

.popular-content h4 a:hover {
    color: var(--primary-color);
}

.popular-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-light);
}

.categories-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.categories-list li {
    margin-bottom: var(--spacing-sm);
}

.categories-list li:last-child {
    margin-bottom: 0;
}

.categories-list a {
    display: flex;
    justify-content: space-between;
    color: var(--text-color);
    padding: 8px 0;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.categories-list a:hover {
    color: var(--primary-color);
    background-color: var(--bg-lighter);
    padding: 8px 12px;
    margin: 0 -12px;
}

.categories-list .count {
    background-color: var(--bg-lighter);
    color: var(--text-light);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.8rem;
}

.categories-list a:hover .count {
    background-color: var(--bg-color);
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-cloud .tag {
    display: inline-block;
    padding: 6px 12px;
    background-color: var(--bg-lighter);
    color: var(--text-color);
    border-radius: 16px;
    font-size: 0.85rem;
    transition: all var(--transition-fast);
}

.tag-cloud .tag:hover {
    background-color: var(--primary-color);
    color: var(--text-white);
}

.resources-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.resource-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    background-color: var(--bg-lighter);
    transition: all var(--transition-normal);
    color: var(--text-color);
}

.resource-item:hover {
    background-color: var(--border-color);
    transform: translateY(-2px);
}

.resource-icon {
    color: var(--primary-color);
}

.resource-icon svg {
    width: 20px;
    height: 20px;
}

.resource-content h4 {
    font-size: 0.95rem;
    margin-bottom: 5px;
}

.resource-content p {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 0;
}

.toc-widget .toc-nav ul {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.toc-widget .toc-nav li {
    margin-bottom: var(--spacing-sm);
}

.toc-widget .toc-nav li:last-child {
    margin-bottom: 0;
}

.toc-link {
    display: block;
    padding: 10px 15px;
    color: var(--text-color);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    font-size: 0.95rem;
}

.toc-link:hover {
    background-color: var(--bg-lighter);
    color: var(--primary-color);
}

.toc-link.active {
    background-color: var(--primary-color);
    color: var(--text-white);
}



.main-footer {
    background-color: var(--bg-dark);
    color: var(--text-white);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-col h3 {
    color: var(--text-white);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
}

.footer-description {
    color: #9ca3af;
    margin-bottom: var(--spacing-lg);
    font-size: 0.95rem;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: #d1d5db;
    font-size: 0.95rem;
}

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

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--text-white);
    transition: all var(--transition-normal);
}

.social-links a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.social-links svg {
    width: 20px;
    height: 20px;
}

.subscribe-form {
    margin-top: var(--spacing-lg);
}

.form-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.form-group input {
    flex: 1;
    padding: 12px 15px;
    border-radius: var(--border-radius);
    border: 1px solid #374151;
    background-color: #1f2937;
    color: var(--text-white);
    font-size: 0.95rem;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-note {
    font-size: 0.85rem;
    color: #9ca3af;
}

.footer-bottom {
    padding: 20px 0;
    display: flex;
    justify-content: center;
    font-size: 0.9rem;
    color: #9ca3af;
}

.footer-bottom p {
    margin: 0;
}

.footer-bottom a {
    color: #d1d5db;
}



.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--text-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
    box-shadow: var(--shadow-md);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
}


@media (max-width: 1199px) {
    .container {
        max-width: 960px;
    }

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

    .featured-main {
        grid-column: 1;
        grid-template-columns: 1fr;
    }

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

    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .editor-grid {
        grid-template-columns: 1fr;
    }

    .editor-large {
        grid-column: 1;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .content-wrapper {
        grid-template-columns: 1fr 280px;
    }

    .articles-grid {
        grid-template-columns: 1fr;
    }

    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}


@media (max-width: 1023px) {
    .container {
        max-width: 720px;
    }

    .main-nav {
        display: none;
        position: fixed;
        top: 45px;
        left: 0;
        width: 100%;
        background-color: var(--bg-color);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-lg);
        z-index: 999;
    }

    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .hamburger-menu {
        display: flex;
    }

    .header-actions .btn-primary {
        display: none;
    }

    .content-wrapper {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .featured-grid {
        gap: var(--spacing-lg);
    }

    .section-title {
        font-size: 1.8rem;
    }

    .article-title {
        font-size: 2.2rem;
    }

    .breadcrumb {
        padding-bottom: 10px;
        margin-bottom: 10px;
    }

    .page-header {
        margin-bottom: 20px;
    }

    .page-title {
        font-size: 1.4rem;
        margin: 0;
    }

    .capabilities-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .comment.reply {
        margin-left: 40px;
    }
}

@media (max-width: 767px) {
    .main-header {
        height: auto;
        position: absolute;
    }

    .header-content {
        height: auto;
    }

    .main-content {
        padding-top: 0;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .section-title {
        font-size: 1.6rem;
    }

    .article-title {
        font-size: 1.8rem;
    }

    .article-subtitle {
        font-size: 1.1rem;
    }

    .news-grid {
        grid-template-columns: 100%;
    }

    .card-content {
        padding: var(--spacing-md);
    }

    .category-card {
        padding: var(--spacing-lg);
    }

    .content-wrapper {
        grid-template-columns: 100%;
    }

    .content-main {
        gap: 20px;
    }

    .article-header{
        margin: 0;
    }

    .article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-lg);
    }

    .article-stats {
        width: 100%;
        justify-content: space-between;
    }

    .author-card {
        flex-direction: column;
        text-align: center;
    }

    .comments-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .comments-section {
        margin-bottom: 0;
    }

    .comment-form {
        flex-direction: column;
        margin: 0;
    }

    .form-avatar {
        align-self: flex-start;
    }

    .form-actions {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .capabilities-grid {
        grid-template-columns: 1fr;
    }

    .related-grid {
        grid-template-columns: 1fr;
    }

    .form-group {
        flex-direction: column;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }

    .breadcrumb-actions {
        flex-direction: column;
        align-items: flex-start;
    }

    .list-card-horizontal {
        grid-template-columns: 1fr;
    }

    .list-card .card-meta-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .article-stats {
        align-self: flex-end;
    }

    .share-buttons {
        flex-direction: column;
    }

    .share-btn {
        justify-content: center;
    }
}

@media (max-width: 575px) {
    :root {
        --header-height: 70px;
        --header-scroll-height: 60px;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.4rem;
    }

    .article-title {
        font-size: 1.4rem;
        margin: 0;
    }

    .category-filters {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: var(--spacing-sm);
    }

    .filter-btn {
        white-space: nowrap;
    }

    .pagination {
        flex-direction: column;
        align-items: flex-start;
    }

    .pagination-list {
        flex-wrap: wrap;
    }

    .comment.reply {
        margin-left: var(--spacing-lg);
    }

    .back-to-top {
        width: 44px;
        height: 44px;
        bottom: 20px;
        right: 20px;
    }

    .back-to-top svg {
        width: 18px;
        height: 18px;
    }
}

@media print {

    .main-header,
    .main-footer,
    .back-to-top,
    .sidebar-widget,
    .comments-section,
    .article-share,
    .article-navigation,
    .related-articles {
        display: none !important;
    }

    .main-content {
        margin-top: 0;
        padding: 0;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
        background: #fff;
    }

    a {
        color: #000;
        text-decoration: underline;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        page-break-after: avoid;
    }

    p,
    h2,
    h3 {
        orphans: 3;
        widows: 3;
    }

    pre,
    blockquote {
        page-break-inside: avoid;
    }

    img {
        max-width: 100% !important;
    }

    @page {
        margin: 2cm;
    }
}