:root {
    --primary-color: #1e88e5;
    --bg-color: #0d1117;
    --nav-bg: #161b22;
    --text-color: #c9d1d9;
    --heading-color: #f0f6fc;
    --code-bg: #1b1f23;
    --border-color: #30363d;
}

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

nav {
    position: sticky;
    top: 0;
    background-color: var(--nav-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    gap: 2rem;
    justify-content: center;
    z-index: 1000;
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

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

nav a.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
}

main {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

h1, h2, h3 {
    color: var(--heading-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.3em;
}

.logo {
    display: block;
    margin: 2rem auto;
    max-width: 128px;
    border-radius: 20%;
}

pre {
    background-color: var(--code-bg);
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    border: 1px solid var(--border-color);
}

code {
    font-family: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
    background-color: rgba(110, 118, 129, 0.2);
    padding: 0.2em 0.4em;
    border-radius: 6px;
    font-size: 85%;
}

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

ul, ol {
    padding-left: 2rem;
}

li {
    margin-bottom: 0.5rem;
}

hr {
    height: 0.25em;
    padding: 0;
    margin: 24px 0;
    background-color: var(--border-color);
    border: 0;
}

strong {
    color: var(--heading-color);
}

.note {
    background: rgba(30, 136, 229, 0.1);
    border-left: 4px solid var(--primary-color);
    padding: 1rem;
    margin: 1.5rem 0;
}

.highlight {
    color: var(--primary-color);
    font-weight: bold;
}