/* Base Styles */
:root {
    --primary-color: #0366d6;
    --text-color: #24292e;
    --background-color: #f9f9f9;
    --border-color: #ccc;
    --spacing-unit: 1rem;
    --container-width: 800px;
}

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

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

/* Layout */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
}

.content {
    padding: var(--spacing-unit) 0;
}

/* Header */
.site-header {
    background-color: white;
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    margin-bottom: 2rem;
}

.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
}

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

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    line-height: 1.3;
    color: var(--text-color);
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-top: 2rem;
}

h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-top: 1.75rem;
}

h3 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-top: 1.5rem;
}

p {
    margin-bottom: 1.5rem;
}

/* Links */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.2s ease;
}

a:hover {
    text-decoration: underline;
}

/* Lists */
ul, ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

li {
    margin-bottom: 0.5rem;
}

/* Blockquotes */
blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
    margin: 1.5rem 0;
    color: #666;
}

/* Code blocks */
pre {
    background-color: #f6f8fa;
    border-radius: 6px;
    padding: 1rem;
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

code {
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 0.9em;
    background-color: #f6f8fa;
    padding: 0.2em 0.4em;
    border-radius: 3px;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(3, 102, 214, 0.1);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

button[type="submit"] {
    background-color: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

button[type="submit"]:hover {
    background-color: #0256b3;
}

/* Footer */
.site-footer {
    background-color: white;
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 3rem;
    text-align: center;
    color: #666;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: #666;
    text-decoration: none;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --spacing-unit: 0.75rem;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }

    .main-nav {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Print Styles */
@media print {
    body {
        background-color: white;
    }

    .site-header,
    .site-footer {
        display: none;
    }

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

    .container {
        max-width: none;
        padding: 0;
    }
}