:root {
    --bg: #191919;
    --surface: #222222;
    --border: rgba(255, 255, 255, 0.08);
    --text-primary: rgba(255, 255, 255, 0.95);
    --text-secondary: rgba(255, 255, 255, 0.65);
    --text-tertiary: rgba(255, 255, 255, 0.40);
    --accent: #4085FF;
    --accent-hover: #5A95FF;
}

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

html {
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 760px;
    margin: 0 auto;
    padding: 48px 24px 96px;
}

header {
    border-bottom: 1px solid var(--border);
    padding-bottom: 32px;
    margin-bottom: 40px;
}

header .brand {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 12px;
    text-decoration: none;
    display: inline-block;
}

header h1 {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 8px;
}

header .meta {
    font-size: 14px;
    color: var(--text-tertiary);
}

main h2 {
    font-size: 20px;
    font-weight: 600;
    margin-top: 36px;
    margin-bottom: 12px;
    letter-spacing: -0.2px;
}

main h2:first-child {
    margin-top: 0;
}

main h3 {
    font-size: 16px;
    font-weight: 600;
    margin-top: 20px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

main p {
    color: var(--text-secondary);
    margin-bottom: 14px;
    font-size: 16px;
}

main ul, main ol {
    margin: 12px 0 18px 22px;
    color: var(--text-secondary);
}

main li {
    margin-bottom: 8px;
    font-size: 16px;
}

main a {
    color: var(--accent);
    text-decoration: none;
}

main a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

main strong {
    color: var(--text-primary);
    font-weight: 600;
}

main code {
    font-family: 'SF Mono', Menlo, Monaco, monospace;
    background: var(--surface);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 14px;
    color: var(--text-primary);
}

.callout {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 18px 20px;
    margin: 20px 0;
}

.callout p {
    margin-bottom: 8px;
}

.callout p:last-child {
    margin-bottom: 0;
}

footer {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    margin-top: 56px;
    font-size: 14px;
    color: var(--text-tertiary);
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
}

footer a {
    color: var(--text-secondary);
    text-decoration: none;
}

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

@media (max-width: 600px) {
    .container {
        padding: 32px 20px 72px;
    }
    header h1 {
        font-size: 26px;
    }
    main h2 {
        font-size: 18px;
    }
    main p, main li {
        font-size: 15px;
    }
}