:root {
    --primary-color: #0366d6;
    --text-color: #24292e;
    --bg-color: #ffffff;
    --nav-bg: #f6f8fa;
    --border-color: #e1e4e8;
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background: var(--nav-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}

nav {
    display: flex;
    align-items: center;
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo img {
    width: 32px;
    height: 32px;
    vertical-align: middle;
}

.logo:hover {
    text-decoration: none;
    opacity: 0.9;
}

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

nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
}

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

/* Main Content */
main {
    padding: 3rem 0;
}

h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    font-weight: 600;
    line-height: 1.25;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
    margin-top: 2.5rem;
}

h3 {
    font-size: 1.5rem;
    margin-top: 2rem;
}

p {
    margin-bottom: 1rem;
}

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

a:hover {
    text-decoration: underline;
}

/* Code Blocks */
pre {
    background: var(--nav-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    overflow-x: auto;
    margin: 1rem 0;
}

code {
    font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.9em;
}

/* Lists */
ul, ol {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

li {
    margin-bottom: 0.5rem;
}

/* Footer */
footer {
    background: var(--nav-bg);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
    color: #586069;
}

/* Utility Classes */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background: var(--primary-color);
    color: white;
    border-radius: 3px;
    font-size: 0.875rem;
    margin: 0 0.25rem;
}

.highlight {
    background: #fff8c5;
    padding: 0.2em 0.4em;
    border-radius: 3px;
}