:root {
    --bg-color: #0A0F1D;
    --text-color: #E2E8F0;
    --accent-crimson: #DC2626;
    --accent-graphite: #4B5563;
    --nav-bg: #111827;
    --border-color: #1F2937;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
}

header {
    background-color: var(--nav-bg);
    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: #fff;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    margin: 0;
    padding: 0;
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s;
}

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

.btn-primary {
    background-color: var(--accent-crimson);
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    transition: opacity 0.2s;
}

.btn-primary:hover {
    opacity: 0.9;
}

main {
    max-width: 1000px;
    margin: 3rem auto;
    padding: 0 2rem;
}

h1, h2, h3 {
    color: #fff;
    border-left: 4px solid var(--accent-crimson);
    padding-left: 1rem;
    margin-top: 2.5rem;
}

h1 {
    font-size: 2.5rem;
    margin-top: 0;
}

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

.code-block {
    background-color: #000;
    color: #10B981;
    padding: 1rem;
    border-radius: 4px;
    font-family: 'Fira Code', monospace;
    font-size: 0.875rem;
    overflow-x: auto;
    border: 1px solid var(--accent-graphite);
}

footer {
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    text-align: center;
    font-size: 0.75rem;
    color: var(--accent-graphite);
    margin-top: 5rem;
}

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

table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

th, td {
    text-align: left;
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

th {
    color: var(--accent-crimson);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}