:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.75);
    --border-color: rgba(75, 85, 99, 0.4);
    --accent: #38bdf8;
    --accent-hover: #0284c7;
    --accent-glow: rgba(56, 189, 248, 0.25);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    color: #7dd3fc;
    text-shadow: 0 0 8px var(--accent-glow);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

header {
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

nav ul {
    display: flex;
    list-style: none;
    gap: 28px;
}

nav a {
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    transition: color 0.2s;
}

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

.hero {
    padding: 70px 0 50px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    background: radial-gradient(circle at 50% 20%, rgba(56, 189, 248, 0.08) 0%, transparent 70%);
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: 42px;
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 18px;
    background: linear-gradient(135deg, #ffffff 40%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 19px;
    color: var(--text-secondary);
    max-width: 760px;
    margin: 0 auto;
}

.main-content {
    padding: 50px 0;
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
    margin-top: 35px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 28px;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.card-tag {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 12px;
}

.card h2 {
    font-family: var(--font-heading);
    font-size: 22px;
    line-height: 1.35;
    margin-bottom: 14px;
    color: #ffffff;
}

.card p {
    color: var(--text-secondary);
    font-size: 15px;
    flex-grow: 1;
    margin-bottom: 20px;
}

.card-meta {
    font-size: 13px;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    padding-top: 14px;
}

.article-header {
    margin-bottom: 35px;
    padding-bottom: 25px;
    border-bottom: 1px solid var(--border-color);
}

.article-header h1 {
    font-family: var(--font-heading);
    font-size: 38px;
    line-height: 1.25;
    color: #ffffff;
    margin-bottom: 16px;
}

.article-meta {
    display: flex;
    gap: 20px;
    color: var(--text-muted);
    font-size: 14px;
}

.article-body {
    font-size: 17px;
    line-height: 1.8;
    color: #d1d5db;
}

.article-body h2 {
    font-family: var(--font-heading);
    font-size: 26px;
    color: #ffffff;
    margin: 35px 0 16px;
}

.article-body h3 {
    font-family: var(--font-heading);
    font-size: 21px;
    color: #f3f4f6;
    margin: 28px 0 12px;
}

.article-body p {
    margin-bottom: 22px;
}

.article-body p a {
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.author-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    margin-top: 50px;
    display: flex;
    gap: 20px;
    align-items: center;
}

.author-avatar {
    width: 68px;
    height: 68px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #1e293b);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 700;
    color: #ffffff;
    flex-shrink: 0;
}

.author-info h4 {
    color: #ffffff;
    font-size: 18px;
    margin-bottom: 4px;
}

.author-info .role {
    color: var(--accent);
    font-size: 13px;
    margin-bottom: 8px;
    font-weight: 500;
}

.author-info p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 0;
}

footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 40px 0;
    margin-top: 60px;
    text-align: center;
    font-size: 14px;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 16px;
}

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

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

@media (max-width: 768px) {
    .hero h1 { font-size: 30px; }
    .article-header h1 { font-size: 28px; }
    .nav-container { flex-direction: column; gap: 14px; }
    nav ul { gap: 16px; flex-wrap: wrap; justify-content: center; }
}