:root {
    --bg-color: #0A0F1D;
    --text-primary: #E2E8F0;
    --text-secondary: #94A3B8;
    --accent-color: #CCFF00; /* Vibrant Neon Yellow/Green */
    --accent-hover: #A3CC00;
    --card-bg: #161B22;
    --border-color: #30363D;
    --graphite: #1C2128;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

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

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

header {
    background-color: rgba(10, 15, 29, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

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

nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

nav a {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

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

.btn-primary {
    background-color: var(--accent-color);
    color: var(--bg-color);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.875rem;
}

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

main {
    max-width: 1200px;
    margin: 4rem auto;
    padding: 0 2rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -0.05em;
}

h2 {
    font-size: 1.5rem;
    margin-top: 3rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

p {
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 8px;
}

.card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

code {
    background-color: var(--graphite);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Fira Code', monospace;
    font-size: 0.9em;
}

pre {
    background-color: var(--graphite);
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1.5rem 0;
    border: 1px solid var(--border-color);
}

footer {
    border-top: 1px solid var(--border-color);
    padding: 4rem 2rem;
    margin-top: 6rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background: rgba(204, 255, 0, 0.1);
    color: var(--accent-color);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 1rem;
}