/* --- Minimalist Clean Theme --- */
:root {
    --background-color: #f8f9fa;
    --card-background: #ffffff;
    --text-color: #343a40;
    --heading-color: #212529;
    --accent-color: #0056b3;
    --border-color: #dee2e6;
    --header-footer-bg: #ffffff;
}

body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    font-size: 16px;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: #003d82;
    text-decoration: underline;
}

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

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

/* --- Header & Navigation --- */
.site-header {
    background-color: var(--header-footer-bg);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(5px);
}

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

.logo {
    font-size: 1.7rem;
    font-weight: 700;
}

.logo a {
    color: var(--heading-color);
}

.logo a:hover {
    text-decoration: none;
    color: var(--accent-color);
}

.main-nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    gap: 20px;
}

.main-nav a {
    font-weight: 500;
    font-size: 1rem;
    color: var(--text-color);
    padding-bottom: 5px;
    border-bottom: 2px solid transparent;
}

.main-nav a:hover, .main-nav .active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
    text-decoration: none;
}

/* --- Main Content Layout --- */
.main-content {
    display: grid;
    grid-template-columns: 2.5fr 1fr;
    gap: 30px;
    margin-top: 30px;
}

.articles-section {
    grid-column: 1 / 2;
}

.sidebar {
    grid-column: 2 / 3;
}

/* --- Article Cards --- */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.article-card {
    background-color: var(--card-background);
    border-radius: 5px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.article-card:hover {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.article-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-bottom: 1px solid var(--border-color);
    border-radius: 5px 5px 0 0;
}

.article-card-content {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.article-card-content .category-tag {
    color: var(--accent-color);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.article-card-content h3 {
    margin: 0 0 10px 0;
    font-size: 1.2rem;
    line-height: 1.4;
    font-weight: 600;
}

.article-card-content h3 a {
    color: var(--heading-color);
}
.article-card-content h3 a:hover {
    color: var(--accent-color);
    text-decoration: none;
}

.article-card-content p {
    font-size: 0.95rem;
    margin: 0 0 auto 0;
    color: #6c757d; /* Bootstrap muted text */
}

.read-more {
    display: inline-block;
    margin-top: 15px;
    font-weight: 600;
}

/* --- Section Headers --- */
.section-header {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 25px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    color: var(--heading-color);
}

/* --- Sidebar --- */
.sidebar-widget {
    background-color: var(--card-background);
    padding: 20px;
    border-radius: 5px;
    margin-bottom: 25px;
    border: 1px solid var(--border-color);
}

.sidebar-widget h4 {
    margin-top: 0;
    font-size: 1.2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    margin-bottom: 15px;
    color: var(--heading-color);
}

.sidebar-widget ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-widget ul li {
    margin-bottom: 8px;
}

/* --- Article Page --- */
.article-full {
    background-color: var(--card-background);
    padding: 40px;
    border-radius: 5px;
    border: 1px solid var(--border-color);
}

.article-header {
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 25px;
    padding-bottom: 25px;
}

.article-header h1 {
    font-size: 2.5rem;
    margin: 0 0 15px 0;
    line-height: 1.2;
    color: var(--heading-color);
}

.article-meta {
    font-size: 0.9rem;
    color: #6c757d;
}

.article-meta .category {
    font-weight: bold;
    color: var(--accent-color);
}

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

.article-content h2 {
    font-size: 1.8rem;
    margin-top: 40px;
    color: var(--heading-color);
}

.article-content h3 {
    font-size: 1.5rem;
    margin-top: 30px;
    color: var(--heading-color);
}

.article-content p, .article-content ul, .article-content blockquote {
    margin-bottom: 1.5em;
}

.article-content blockquote {
    border-left: 3px solid var(--accent-color);
    padding-left: 20px;
    font-style: italic;
    color: #6c757d;
    margin-left: 0;
}

.article-featured-image {
    margin-bottom: 30px;
}

/* --- Footer --- */
.site-footer {
    background-color: var(--header-footer-bg);
    color: #6c757d;
    text-align: center;
    padding: 25px;
    margin-top: 40px;
    border-top: 1px solid var(--border-color);
}

/* --- Responsive Design --- */
@media (max-width: 992px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .site-header .container {
        flex-direction: column;
        gap: 15px;
    }
    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px 15px;
    }
    .article-header h1 {
        font-size: 2rem;
    }
    body {
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .article-full {
        padding: 20px;
    }
    .article-header h1 {
        font-size: 1.8rem;
    }
}