/* --- General Setup --- */
:root {
    --bg-dark-primary: #12121c;
    --bg-dark-secondary: #1a1a2e;
    --accent-primary: #00aaff;
    --accent-secondary: #e94560;
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0c0;
    --border-color: #3a3a5a;
    --font-family: 'Montserrat', sans-serif;
    --content-width: 1200px;
    --border-radius: 8px;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-dark-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-areas:
        "header"
        "main"
        "sidebar"
        "footer";
    gap: 20px;
}

h1, h2, h3 {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.2;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-secondary);
}

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

/* --- Header & Navigation --- */
.header {
    grid-area: header;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
}

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

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

.nav a {
    font-weight: 600;
    padding: 5px 10px;
    border-radius: var(--border-radius);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.nav a.active, .nav a:hover {
    background-color: var(--accent-primary);
    color: var(--bg-dark-primary);
}

/* --- Main Content & Hero --- */
.main-content {
    grid-area: main;
}

.hero {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, var(--bg-dark-secondary), var(--bg-dark-primary));
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.hero h1 {
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.intro-text {
    background-color: var(--bg-dark-secondary);
    padding: 20px;
    border-radius: var(--border-radius);
    margin-bottom: 30px;
}

.text-link {
    font-weight: 600;
    border-bottom: 1px dashed var(--accent-primary);
}

/* --- Articles Grid --- */
.articles-section h2 {
    text-align: center;
    margin-bottom: 30px;
}

.articles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.article-card {
    background-color: var(--bg-dark-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 170, 255, 0.1);
}

.article-card h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.article-card p {
    flex-grow: 1;
    margin-bottom: 15px;
}

.read-more {
    font-weight: 600;
    align-self: flex-start;
}

/* --- Sidebar --- */
.sidebar {
    grid-area: sidebar;
}

.sidebar-widget {
    background-color: var(--bg-dark-secondary);
    padding: 20px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.sidebar-widget h3 {
    font-size: 1.2rem;
    border-bottom: 2px solid var(--accent-primary);
    padding-bottom: 10px;
    margin-bottom: 15px;
}

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

.sidebar-widget ul li a {
    display: block;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    transition: padding-left 0.3s ease;
}

.sidebar-widget ul li a:hover {
    padding-left: 10px;
}

.sidebar-widget ul li:last-child a {
    border-bottom: none;
}

.promo {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--text-primary);
}
.promo p, .promo a {
    color: var(--text-primary);
    font-weight: 600;
}

/* --- Footer --- */
.footer {
    grid-area: footer;
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* --- Article Page Specific --- */
.article-page .main-content {
    background-color: var(--bg-dark-secondary);
    padding: 30px;
    border-radius: var(--border-radius);
}

.article-header {
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.article-header h1 {
    font-size: 2.8rem;
}

.article-meta {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.article-content h2 {
    margin-top: 2.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-primary);
}

.article-content h3 {
    margin-top: 1.5rem;
    color: var(--accent-primary);
}

.article-content ul, .article-content ol {
    margin-left: 20px;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.article-content blockquote {
    border-left: 4px solid var(--accent-secondary);
    padding-left: 1rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: var(--text-primary);
    background-color: var(--bg-dark-primary);
    padding: 1rem;
    border-radius: var(--border-radius);
}

.cta-box {
    text-align: center;
    padding: 30px;
    margin-top: 2rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--border-radius);
}

.cta-box h2 {
    color: var(--text-primary);
    border: none;
}
.cta-box p {
    color: var(--text-primary);
    font-size: 1.1rem;
}

.cta-box .cta-link {
    display: inline-block;
    background-color: var(--text-primary);
    color: var(--bg-dark-primary);
    padding: 12px 25px;
    border-radius: 50px;
    font-weight: 700;
    margin-top: 1rem;
    transition: transform 0.3s ease;
}

.cta-box .cta-link:hover {
    transform: scale(1.05);
}

/* --- Responsive Design --- */
@media (min-width: 600px) {
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .container {
        grid-template-columns: 2fr 1fr;
        grid-template-areas:
            "header header"
            "main sidebar"
            "footer footer";
        gap: 30px;
    }

    .articles-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .article-page .container {
         grid-template-columns: 3fr 1fr;
    }
}