:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #38bdf8;
    --accent-hover: #0284c7;
    --border: #334155;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1.5rem;
    width: 100%;
}

header {
    border-bottom: 1px solid var(--border);
    padding: 1.25rem 0;
}

.nav-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--accent);
    letter-spacing: -0.5px;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 1.5rem;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

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

main {
    flex: 1;
    padding: 3rem 1.5rem;
}

.hero {
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.15rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.tag {
    display: inline-block;
    background-color: rgba(56, 189, 248, 0.15);
    color: var(--accent);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

.card h2 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.date {
    font-size: 0.8rem;
    color: var(--text-secondary);
    opacity: 0.8;
}

.content-section {
    max-width: 650px;
}

.content-section h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

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

.content-section ul {
    margin-left: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.content-section li {
    margin-bottom: 0.5rem;
}

.btn {
    display: inline-block;
    background-color: var(--accent);
    color: #0f172a;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
}

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

footer {
    border-top: 1px solid var(--border);
    padding: 1.5rem 0;
    margin-top: auto;
}

.footer-content {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
}