/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4a90e2;
    --secondary-color: #2c5aa0;
    --text-color: #333;
    --text-light: #666;
    --border-color: #e0e0e0;
    --bg-color: #ffffff;
    --bg-light: #f8f9fa;
    --code-bg: #f4f4f4;
    --max-width: 1200px;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.site-header {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    padding: 2rem 0 1rem;
    margin-bottom: 3rem;
}

.header-content {
    text-align: center;
    margin-bottom: 1.5rem;
}

.site-title {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.site-title a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s;
}

.site-title a:hover {
    color: var(--secondary-color);
}

.site-subtitle {
    color: var(--text-light);
    font-size: 1.1rem;
    font-weight: 300;
}

/* Navigation */
.main-nav {
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.main-nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.main-nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s;
}

.main-nav a:hover,
.main-nav a.active {
    background-color: var(--primary-color);
    color: white;
}

/* Main Content */
.main-content {
    background-color: var(--bg-color);
    padding: 3rem 0;
    min-height: 60vh;
}

.page-content {
    max-width: 900px;
    margin: 0 auto;
}

.page-title {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

/* Content Typography */
.content h2 {
    font-size: 1.75rem;
    color: var(--secondary-color);
    margin: 2rem 0 1rem;
}

.content h3 {
    font-size: 1.5rem;
    margin: 1.5rem 0 1rem;
}

.content p {
    margin-bottom: 1.25rem;
    line-height: 1.8;
}

.content a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s;
}

.content a:hover {
    border-bottom-color: var(--primary-color);
}

.content ul,
.content ol {
    margin: 1rem 0 1rem 2rem;
}

.content li {
    margin-bottom: 0.5rem;
}

.content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 2rem auto;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.content code {
    background-color: var(--code-bg);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9em;
}

.content pre {
    background-color: var(--code-bg);
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    margin: 1.5rem 0;
}

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

.content blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1.5rem;
    margin: 1.5rem 0;
    color: var(--text-light);
    font-style: italic;
}

.content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

.content th,
.content td {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    text-align: left;
}

.content th {
    background-color: var(--bg-light);
    font-weight: 600;
}

/* Footer */
.site-footer {
    background-color: var(--bg-color);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 3rem;
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
}

.site-footer p {
    margin-bottom: 0.5rem;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    .site-title {
        font-size: 1.75rem;
    }

    .site-subtitle {
        font-size: 1rem;
    }

    .page-title {
        font-size: 1.5rem;
    }

    .content h2 {
        font-size: 1.5rem;
    }

    .main-nav ul {
        gap: 1rem;
    }

    .main-nav a {
        padding: 0.4rem 0.75rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .main-nav ul {
        flex-direction: column;
        align-items: center;
    }
}