:root {
    --bg-primary: #0A0F1D;
    --bg-secondary: #111827;
    --text-primary: #F9FAFB;
    --text-secondary: #9CA3AF;
    --accent: #0EA5E9;
    --accent-hover: #38BDF8;
    --border: #1F2937;
    --silver: #E5E7EB;
}

* {
    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-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
}

header {
    background-color: rgba(10, 15, 29, 0.8);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--silver);
    letter-spacing: -0.025em;
    text-decoration: none;
}

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

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

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

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

.btn-primary {
    background-color: var(--accent);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    transition: background-color 0.2s;
}

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

main {
    max-width: 1000px;
    margin: 4rem auto;
    padding: 0 2rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--silver);
}

h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 2.5rem 0 1rem;
    color: var(--silver);
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
}

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

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 1.5rem;
    border-radius: 0.5rem;
}

.card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
    color: var(--accent);
}

code {
    background-color: #1F2937;
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.875rem;
}

pre {
    background-color: #111827;
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    overflow-x: auto;
    margin: 1.5rem 0;
}

pre code {
    background-color: transparent;
    padding: 0;
}

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

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.contact-item {
    padding: 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    text-align: center;
}

.contact-item span {
    display: block;
    color: var(--accent);
    font-weight: 600;
    margin-top: 0.5rem;
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 1rem;
        padding: 1.5rem;
    }
    nav ul {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
}