/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --text-muted: #666666;
    --border-color: #e5e5e5;
    --link-color: #0066cc;
    --link-hover: #0052a3;
    --header-bg: rgba(255, 255, 255, 0.8);
    --code-bg: #f5f5f5;
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #e5e5e5;
    --text-muted: #a0a0a0;
    --border-color: #333333;
    --link-color: #66b3ff;
    --link-hover: #4da6ff;
    --header-bg: rgba(26, 26, 26, 0.8);
    --code-bg: #2a2a2a;
}

body {
    font-family: 'JetBrains Mono', monospace;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    font-size: 14px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background-color: var(--header-bg);
    backdrop-filter: blur(10px);
    z-index: 100;
}

.logo a {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
    text-decoration: none;
}

.nav {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s ease;
}

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

.icon-btn {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    transition: background-color 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background-color: var(--code-bg);
}

.moon-icon {
    display: none;
}

[data-theme="dark"] .sun-icon {
    display: none;
}

[data-theme="dark"] .moon-icon {
    display: block;
}

/* Main content */
.main {
    flex: 1;
    padding: 60px 0;
}

.hero {
    margin-bottom: 80px;
}

.hero h1 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 30px;
    line-height: 1.3;
}

.rss-link {
    margin-bottom: 20px;
}

.rss-link svg {
    color: var(--link-color);
}

.intro-text {
    margin-bottom: 16px;
    color: var(--text-muted);
    line-height: 1.7;
}

.underline-link {
    color: var(--text-color);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
}

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

.social-links {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 24px;
    color: var(--text-muted);
}

.social-icon {
    color: var(--text-color);
    transition: color 0.2s ease;
}

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

/* Recent posts */
.recent-posts h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 40px;
}

.post-item {
    margin-bottom: 40px;
    padding-bottom: 20px;
}

.post-item:not(:last-child) {
    border-bottom: 1px solid var(--border-color);
}

.post-item h3 {
    margin-bottom: 8px;
}

.post-link {
    color: var(--link-color);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
}

.post-link:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

.post-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 8px;
    color: var(--text-muted);
    font-size: 12px;
}

.post-meta svg {
    flex-shrink: 0;
}

.post-excerpt {
    color: var(--text-muted);
    line-height: 1.6;
}

.all-posts-link {
    text-align: center;
    margin-top: 40px;
}

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

.all-posts-link a:hover {
    color: var(--link-color);
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 40px 0;
    margin-top: 60px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 12px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .header {
        padding: 16px 0;
    }
    
    .nav {
        gap: 12px;
    }
    
    .nav a {
        font-size: 13px;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .main {
        padding: 40px 0;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 24px;
    }
    
    .nav {
        gap: 8px;
    }
    
    .social-links {
        flex-wrap: wrap;
    }
}