/* SIF Website Styles */

:root {
    --primary-color: #2c3e50;
    --accent-color: #3498db;
    --text-color: #333;
    --bg-color: #fff;
    --border-color: #e1e8ed;
    --link-color: #3498db;
    --link-hover: #2980b9;
}

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

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

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.site-header {
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
    margin-bottom: 40px;
}

.header-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-title {
    font-size: 1.4em;
    font-weight: 600;
}

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

.main-nav {
    display: flex;
    gap: 25px;
}

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

.nav-link:hover {
    color: var(--link-hover);
}

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

/* Main content */
.main-content {
    min-height: 60vh;
    margin-bottom: 60px;
}

.main-content h1 {
    font-size: 2.5em;
    margin-bottom: 0.5em;
    color: var(--primary-color);
}

.main-content h2 {
    font-size: 1.8em;
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    color: var(--primary-color);
}

.main-content h3 {
    font-size: 1.3em;
    margin-top: 1.2em;
    margin-bottom: 0.4em;
}

.main-content p {
    margin-bottom: 1em;
}

.main-content ul, .main-content ol {
    margin-left: 2em;
    margin-bottom: 1em;
}

.main-content li {
    margin-bottom: 0.5em;
}

.main-content a {
    color: var(--link-color);
    text-decoration: none;
}

.main-content a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

.main-content code {
    background: #f5f5f5;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.9em;
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
}

.main-content pre {
    background: #f5f5f5;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 1em;
}

.main-content pre code {
    background: none;
    padding: 0;
}

.main-content blockquote {
    border-left: 4px solid var(--accent-color);
    padding-left: 1em;
    margin: 1em 0;
    font-style: italic;
    color: #666;
}

.main-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1em 0;
}

.main-content th, .main-content td {
    border: 1px solid var(--border-color);
    padding: 10px;
    text-align: left;
}

.main-content th {
    background: #f5f5f5;
    font-weight: 600;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border-color);
    padding: 30px 0;
    margin-top: 60px;
    text-align: center;
    color: #666;
    font-size: 0.9em;
}

.footer-content p {
    margin: 5px 0;
}

.footer-content a {
    color: var(--link-color);
    text-decoration: none;
}

.footer-content a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }

    .main-nav {
        gap: 15px;
    }

    .main-content h1 {
        font-size: 2em;
    }

    .main-content h2 {
        font-size: 1.5em;
    }
}