:root {
    --bg-color: #0A0F1D;
    --sidebar-bg: #0F172A;
    --text-primary: #E2E8F0;
    --text-secondary: #94A3B8;
    --accent-color: #38BDF8;
    --border-color: #1E293B;
    --header-bg: rgba(10, 15, 29, 0.8);
    --btn-bg: #38BDF8;
    --btn-hover: #7DD3FC;
    --code-bg: #1E293B;
}

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

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

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

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

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

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

.btn-primary {
    background-color: var(--btn-bg);
    color: #000;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    font-size: 0.875rem;
    transition: background-color 0.2s;
}

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

.container {
    display: flex;
    flex: 1;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

aside {
    width: 280px;
    border-right: 1px solid var(--border-color);
    padding: 2rem;
    height: calc(100vh - 64px);
    position: sticky;
    top: 64px;
    overflow-y: auto;
}

aside h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

aside ul {
    list-style: none;
}

aside li {
    margin-bottom: 0.75rem;
}

aside a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    display: block;
    transition: color 0.2s;
}

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

main {
    flex: 1;
    padding: 3rem 4rem;
    max-width: 900px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -0.025em;
}

h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

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

.technical-block {
    background-color: var(--code-bg);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 8px;
    font-family: 'Fira Code', monospace;
    font-size: 0.875rem;
    margin: 1.5rem 0;
    overflow-x: auto;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

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

.card h4 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

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

@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }
    aside {
        width: 100%;
        height: auto;
        position: static;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    main {
        padding: 2rem;
    }
}