:root {
    --bg-main: #0D1117;
    --bg-secondary: #161B22;
    --primary-color: #C62828; /* Dark Red */
    --primary-hover: #D32F2F;
    --text-main: #FFFFFF;
    --text-muted: #8B949E;
    --border-color: #30363D;
    --accent: #FFFFFF;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

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

/* Navbar */
.navbar {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 900;
    font-size: 1.5rem;
    color: var(--accent) !important;
    letter-spacing: -0.5px;
}

.navbar-brand span {
    color: var(--primary-color);
}

.nav-link {
    color: var(--text-muted) !important;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-main) !important;
}

/* Cards */
.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    border-color: var(--primary-color);
}

.card-img-top {
    height: 200px;
    object-fit: cover;
}

.card-body {
    padding: 1.5rem;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.card-text {
    color: var(--text-muted);
}

/* Article Badge/Category */
.badge-category {
    background-color: rgba(198, 40, 40, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(198, 40, 40, 0.2);
    padding: 0.4em 0.8em;
    font-weight: 600;
    border-radius: 6px;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

/* Footer */
footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
    margin-top: 4rem;
}

.footer-heading {
    color: var(--text-main);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.footer-link {
    color: var(--text-muted);
    display: block;
    margin-bottom: 0.75rem;
}

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

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    font-weight: 600;
    padding: 0.6rem 1.5rem;
    border-radius: 8px;
}

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

/* Hero Section */
.hero-section {
    padding: 4rem 0;
    border-bottom: 1px solid var(--border-color);
    background: radial-gradient(circle at top right, rgba(198, 40, 40, 0.05) 0%, transparent 40%);
}

.hero-title {
    font-size: 3rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

/* Article Page */
.article-header {
    margin-bottom: 2rem;
}

.article-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.article-meta {
    color: var(--text-muted);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 15px;
}

.article-content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #C9D1D9;
}

.article-content h2, .article-content h3 {
    color: var(--text-main);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    margin: 2rem 0;
}

.article-content pre {
    background-color: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    overflow-x: auto;
}

/* Sidebar */
.sidebar-widget {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.sidebar-title {
    font-size: 1.2rem;
    margin-bottom: 1.2rem;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
    display: inline-block;
}