:root {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --accent-color: #2563eb;
    --secondary-text: #4b5563;
    --ai-summary-bg: #f0f7ff;
    --border-color: #e5e7eb;
}

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

.site-header {
    border-bottom: 1px solid var(--border-color);
    background: #fff;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-logo {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-color);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.site-nav a {
    margin-left: 1.5rem;
    color: var(--secondary-text);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.15s;
}

.site-nav a:hover {
    color: var(--accent-color);
}

.content-wrapper {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

h1,
h2,
h3 {
    color: var(--accent-color);
}

#ai-summary {
    background: var(--ai-summary-bg);
    border-left: 4px solid var(--accent-color);
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 8px;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-color);
}

footer {
    margin-top: 4rem;
    font-size: 0.8rem;
    color: #8b949e;
}

blockquote {
    border-left: 4px solid #30363d;
    padding-left: 1rem;
    margin-left: 0;
    color: #8b949e;
}