:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f4f4f4;
    --text-primary: #333333;
    --text-secondary: #666666;
    --border-color: #e1e1e1;
    --link-color: #0066cc;
}

[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2a2a2a;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --border-color: #404040;
    --link-color: #4d9fff;
}

* {
    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-primary);
    background: var(--bg-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

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

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

header .site-title {
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    color: var(--text-primary);
}

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

header ul {
    list-style: none;
    display: flex;
    gap: 20px;
    margin: 0;
}

header ul li a {
    text-decoration: none;
    color: var(--text-secondary);
    transition: color 0.2s;
}

header ul li a:hover {
    color: var(--text-primary);
}

.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    width: 50px;
    height: 28px;
    cursor: pointer;
    display: flex;
    align-items: center;
    padding: 2px;
    transition: all 0.3s ease;
    position: relative;
}

.theme-toggle:hover {
    opacity: 0.8;
}

.toggle-icon {
    width: 22px;
    height: 22px;
    background: var(--text-primary);
    border-radius: 50%;
    transition: transform 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .toggle-icon {
    transform: translateX(22px);
}

main {
    min-height: calc(100vh - 200px);
    padding-bottom: 40px;
}

h1 {
    font-size: 2rem;
    margin-bottom: 20px;
}

h2 {
    font-size: 1.5rem;
    margin-top: 40px;
    margin-bottom: 20px;
}

h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

time {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.posts {
    margin-top: 30px;
}

.post-item {
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border-color);
}

.post-item:last-child {
    border-bottom: none;
}

.post-item h2 a,
.post-item h3 a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s;
}

.post-item h2 a:hover,
.post-item h3 a:hover {
    color: var(--link-color);
}

.post-item time {
    display: block;
    margin: 5px 0 10px 0;
}

.post-item p {
    margin-top: 10px;
    color: var(--text-secondary);
}

.post-item-compact {
    margin-bottom: 25px;
    padding-bottom: 25px;
    border-bottom: 1px solid var(--border-color);
}

.post-item-compact:last-child {
    border-bottom: none;
}

.post-item-compact h3 a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s;
    font-size: 1.1rem;
}

.post-item-compact h3 a:hover {
    color: var(--link-color);
}

.post-item-compact time {
    display: block;
    margin-top: 5px;
}

article .content {
    margin-top: 30px;
    line-height: 1.8;
}

article .content p {
    margin-bottom: 20px;
}

article .content ul,
article .content ol {
    margin-bottom: 20px;
    padding-left: 30px;
}

article .content li {
    margin-bottom: 10px;
}

article .content code {
    background: var(--bg-secondary);
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.9em;
    color: var(--text-primary);
}

article .content pre {
    background: var(--bg-secondary);
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

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

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

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

article .content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 20px 0;
    border-radius: 5px;
}

footer {
    border-top: 1px solid var(--border-color);
    padding: 20px 0;
    margin-top: 40px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 40px;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
}

.pagination-link {
    color: var(--link-color);
    text-decoration: none;
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    transition: all 0.2s;
}

.pagination-link:hover {
    background: var(--bg-secondary);
}

.pagination-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 15px 0 20px 0;
}

.tag {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 4px 12px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 0.85rem;
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.tag:hover {
    background: var(--link-color);
    color: #ffffff;
    border-color: var(--link-color);
}

/* Syntax Highlighting - Light Theme (GitHub style) */
.bg { background-color:#f7f7f7; }
.chroma { background-color:#f7f7f7;-webkit-text-size-adjust:none; }
.chroma .err { color:#f6f8fa;background-color:#82071e }
.chroma .lnlinks { outline:none;text-decoration:none;color:inherit }
.chroma .lntd { vertical-align:top;padding:0;margin:0;border:0; }
.chroma .lntable { border-spacing:0;padding:0;margin:0;border:0; }
.chroma .hl { background-color:#dedede }
.chroma .lnt { white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f }
.chroma .ln { white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f }
.chroma .line { display:flex; }
.chroma .k { color:#cf222e }
.chroma .kc { color:#cf222e }
.chroma .kd { color:#cf222e }
.chroma .kn { color:#cf222e }
.chroma .kp { color:#cf222e }
.chroma .kr { color:#cf222e }
.chroma .kt { color:#cf222e }
.chroma .na { color:#1f2328 }
.chroma .nc { color:#1f2328 }
.chroma .no { color:#0550ae }
.chroma .nd { color:#0550ae }
.chroma .ni { color:#6639ba }
.chroma .nl { color:#900;font-weight:bold }
.chroma .nn { color:#24292e }
.chroma .nx { color:#1f2328 }
.chroma .nt { color:#0550ae }
.chroma .nb { color:#6639ba }
.chroma .bp { color:#6a737d }
.chroma .nv { color:#953800 }
.chroma .vc { color:#953800 }
.chroma .vg { color:#953800 }
.chroma .vi { color:#953800 }
.chroma .vm { color:#953800 }
.chroma .nf { color:#6639ba }
.chroma .fm { color:#6639ba }
.chroma .s { color:#0a3069 }
.chroma .sa { color:#0a3069 }
.chroma .sb { color:#0a3069 }
.chroma .sc { color:#0a3069 }
.chroma .dl { color:#0a3069 }
.chroma .sd { color:#0a3069 }
.chroma .s2 { color:#0a3069 }
.chroma .se { color:#0a3069 }
.chroma .sh { color:#0a3069 }
.chroma .si { color:#0a3069 }
.chroma .sx { color:#0a3069 }
.chroma .sr { color:#0a3069 }
.chroma .s1 { color:#0a3069 }
.chroma .ss { color:#032f62 }
.chroma .m { color:#0550ae }
.chroma .mb { color:#0550ae }
.chroma .mf { color:#0550ae }
.chroma .mh { color:#0550ae }
.chroma .mi { color:#0550ae }
.chroma .il { color:#0550ae }
.chroma .mo { color:#0550ae }
.chroma .o { color:#0550ae }
.chroma .ow { color:#0550ae }
.chroma .p { color:#1f2328 }
.chroma .c { color:#57606a }
.chroma .ch { color:#57606a }
.chroma .cm { color:#57606a }
.chroma .c1 { color:#57606a }
.chroma .cs { color:#57606a }
.chroma .cp { color:#57606a }
.chroma .cpf { color:#57606a }
.chroma .gd { color:#82071e;background-color:#ffebe9 }
.chroma .ge { color:#1f2328 }
.chroma .gi { color:#116329;background-color:#dafbe1 }
.chroma .go { color:#1f2328 }
.chroma .gl { text-decoration:underline }
.chroma .w { color:#fff }

/* Syntax Highlighting - Dark Theme (Monokai style) */
[data-theme="dark"] .bg { color:#f8f8f2;background-color:#272822; }
[data-theme="dark"] .chroma { color:#f8f8f2;background-color:#272822;-webkit-text-size-adjust:none; }
[data-theme="dark"] .chroma .err { color:#960050;background-color:#1e0010 }
[data-theme="dark"] .chroma .hl { background-color:#3c3d38 }
[data-theme="dark"] .chroma .lnt { white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f }
[data-theme="dark"] .chroma .ln { white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f }
[data-theme="dark"] .chroma .k { color:#66d9ef }
[data-theme="dark"] .chroma .kc { color:#66d9ef }
[data-theme="dark"] .chroma .kd { color:#66d9ef }
[data-theme="dark"] .chroma .kn { color:#f92672 }
[data-theme="dark"] .chroma .kp { color:#66d9ef }
[data-theme="dark"] .chroma .kr { color:#66d9ef }
[data-theme="dark"] .chroma .kt { color:#66d9ef }
[data-theme="dark"] .chroma .na { color:#a6e22e }
[data-theme="dark"] .chroma .nc { color:#a6e22e }
[data-theme="dark"] .chroma .no { color:#66d9ef }
[data-theme="dark"] .chroma .nd { color:#a6e22e }
[data-theme="dark"] .chroma .ne { color:#a6e22e }
[data-theme="dark"] .chroma .nx { color:#a6e22e }
[data-theme="dark"] .chroma .nt { color:#f92672 }
[data-theme="dark"] .chroma .nf { color:#a6e22e }
[data-theme="dark"] .chroma .fm { color:#a6e22e }
[data-theme="dark"] .chroma .l { color:#ae81ff }
[data-theme="dark"] .chroma .ld { color:#e6db74 }
[data-theme="dark"] .chroma .s { color:#e6db74 }
[data-theme="dark"] .chroma .sa { color:#e6db74 }
[data-theme="dark"] .chroma .sb { color:#e6db74 }
[data-theme="dark"] .chroma .sc { color:#e6db74 }
[data-theme="dark"] .chroma .dl { color:#e6db74 }
[data-theme="dark"] .chroma .sd { color:#e6db74 }
[data-theme="dark"] .chroma .s2 { color:#e6db74 }
[data-theme="dark"] .chroma .se { color:#ae81ff }
[data-theme="dark"] .chroma .sh { color:#e6db74 }
[data-theme="dark"] .chroma .si { color:#e6db74 }
[data-theme="dark"] .chroma .sx { color:#e6db74 }
[data-theme="dark"] .chroma .sr { color:#e6db74 }
[data-theme="dark"] .chroma .s1 { color:#e6db74 }
[data-theme="dark"] .chroma .ss { color:#e6db74 }
[data-theme="dark"] .chroma .m { color:#ae81ff }
[data-theme="dark"] .chroma .mb { color:#ae81ff }
[data-theme="dark"] .chroma .mf { color:#ae81ff }
[data-theme="dark"] .chroma .mh { color:#ae81ff }
[data-theme="dark"] .chroma .mi { color:#ae81ff }
[data-theme="dark"] .chroma .il { color:#ae81ff }
[data-theme="dark"] .chroma .mo { color:#ae81ff }
[data-theme="dark"] .chroma .o { color:#f92672 }
[data-theme="dark"] .chroma .ow { color:#f92672 }
[data-theme="dark"] .chroma .c { color:#75715e }
[data-theme="dark"] .chroma .ch { color:#75715e }
[data-theme="dark"] .chroma .cm { color:#75715e }
[data-theme="dark"] .chroma .c1 { color:#75715e }
[data-theme="dark"] .chroma .cs { color:#75715e }
[data-theme="dark"] .chroma .cp { color:#75715e }
[data-theme="dark"] .chroma .cpf { color:#75715e }
[data-theme="dark"] .chroma .gd { color:#f92672 }
[data-theme="dark"] .chroma .ge { font-style:italic }
[data-theme="dark"] .chroma .gi { color:#a6e22e }
[data-theme="dark"] .chroma .gs { font-weight:bold }
[data-theme="dark"] .chroma .gu { color:#75715e }

/* About Page Black Background */

body.about-page {
    background: #000000;
    color: #e0e0e0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.8;
}

body.about-page .container {
    background: #000000;
    max-width: 900px;
}

body.about-page h1 {
    color: #ffffff;
    font-weight: 600;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

body.about-page h2 {
    color: #ffffff;
    font-weight: 600;
    font-size: 1.8rem;
    margin-top: 3rem;
    margin-bottom: 1.5rem;
}

body.about-page h3 {
    color: #ffffff;
    font-weight: 600;
    font-size: 1.3rem;
    margin-top: 2.5rem;
    margin-bottom: 0.5rem;
}

body.about-page h4 {
    color: #cccccc;
    font-weight: 500;
    font-size: 1.1rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

body.about-page p {
    color: #b0b0b0;
    margin-bottom: 1rem;
}

body.about-page strong {
    color: #e0e0e0;
    font-weight: 600;
}

body.about-page em {
    color: #999;
}

body.about-page ul {
    margin-bottom: 1.5rem;
}

body.about-page li {
    color: #a0a0a0;
    margin-bottom: 0.6rem;
    line-height: 1.7;
}

body.about-page a {
    color: #888;
    text-decoration: underline;
}

body.about-page a:hover {
    color: #aaa;
}

body.about-page hr {
    border: none;
    border-top: 1px solid #333;
    margin: 3rem 0;
}

body.about-page header {
    background: #000000;
    border-bottom-color: #222;
}

body.about-page .site-title {
    color: #ffffff;
}

body.about-page header ul li a {
    color: #999;
}

body.about-page header ul li a:hover {
    color: #ffffff;
}

body.about-page footer {
    background: #000000;
    border-top-color: #222;
    color: #666;
}

/* Subtitle */
body.about-page .subtitle {
    font-size: 0.95rem;
    color: #666;
    font-weight: 400;
    margin: 0.5rem 0 2rem 0;
}

/* Contact Links Section */
.contact-links {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 0 0 3rem 0;
    flex-wrap: wrap;
    font-size: 14px;
}

.contact-links a {
    color: #888;
    text-decoration: none;
    transition: color 0.2s ease;
}

.contact-links a:hover {
    color: #ccc;
}

.contact-links .separator {
    color: #444;
    user-select: none;
}