:root {
    --bg:           #FFFFFF;
    --surface:      #F5F5F7;
    --text:         #000000;
    --muted:        #6E6E73;
    --divider:      #E5E5EA;
    --accent:       #00B4FF;
    --destructive:  #FF3B30;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg:          #000000;
        --surface:     #0F0F0F;
        --text:        #FFFFFF;
        --muted:       #98989D;
        --divider:     #1F1F1F;
        --accent:      #FF3B30;
        --destructive: #FF3B30;
    }
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); }
body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.65;
    letter-spacing: -0.005em;
}
.shell { max-width: 720px; margin: 0 auto; padding: 56px 24px 96px; }
header.brand {
    display: flex; align-items: center; justify-content: space-between;
    border-bottom: 1px solid var(--divider);
    padding-bottom: 16px;
    margin-bottom: 40px;
}
.brand a { color: inherit; text-decoration: none; }
.brand .name {
    font-family: "Bebas Neue", "Archivo Black", system-ui, sans-serif;
    font-size: 28px;
    letter-spacing: 0.02em;
    color: var(--accent);
}
.brand nav a {
    font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    color: var(--muted);
    margin-left: 16px;
    border-bottom: 2px solid transparent;
    padding-bottom: 2px;
}
.brand nav a:hover { color: var(--text); border-color: var(--accent); }
h1 {
    font-family: "Bebas Neue", "Archivo Black", system-ui, sans-serif;
    font-size: 48px;
    line-height: 1;
    letter-spacing: 0.01em;
    margin: 0 0 16px;
}
h2 {
    font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    color: var(--muted);
    margin: 40px 0 12px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--divider);
}
h3 { font-size: 18px; margin: 24px 0 8px; }
p { margin: 0 0 12px; }
ul, ol { margin: 0 0 16px; padding-left: 22px; }
li { margin: 4px 0; }
a { color: var(--accent); text-decoration: none; border-bottom: 1px solid currentColor; }
a:hover { color: var(--text); }
strong { font-weight: 600; }
em { font-style: italic; color: var(--muted); }
table {
    border-collapse: collapse;
    width: 100%;
    margin: 16px 0;
    font-size: 14px;
}
th, td {
    text-align: left;
    padding: 8px 10px;
    border-bottom: 1px solid var(--divider);
    vertical-align: top;
}
th {
    font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    color: var(--muted);
}
code {
    font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
    font-size: 13px;
    background: var(--surface);
    padding: 2px 6px;
    border-radius: 4px;
}
hr { border: none; border-top: 1px solid var(--divider); margin: 32px 0; }
footer {
    margin-top: 72px;
    padding-top: 16px;
    border-top: 1px solid var(--divider);
    color: var(--muted);
    font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: -0.02em;
}
blockquote {
    border-left: 2px solid var(--accent);
    margin: 16px 0;
    padding: 4px 0 4px 16px;
    color: var(--muted);
}