@font-face {
    font-family: 'Fira Code';
    src: url('/templates/FiraCode-Regular.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.7;
    color: var(--foreground);
    background: var(--background);
}

.header {
    border-bottom: 1px solid var(--comment);
    padding: 1.5rem 0;
}

.header-container {
    max-width: 700px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-title {
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--main-highlight);
}

.theme-select {
    padding: 0.5rem 1rem;
    border: 1px solid var(--comment);
    border-radius: 4px;
    background: var(--background-elevated);
    color: var(--foreground);
    font-size: 0.875rem;
    cursor: pointer;
}

.container {
    max-width: 700px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.article-header {
    margin-bottom: 3rem;
}

.title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--foreground);
}

.meta {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--comment);
    margin-bottom: 1rem;
}

.author::before {
    content: "•";
    margin-right: 0.5rem;
}

.tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag {
    background: var(--background-elevated);
    color: var(--main-highlight);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.875rem;
    text-decoration: none;
    transition: background 0.2s;
}

.tag:hover {
    background: var(--comment);
}

.content {
    font-size: 1.05rem;
}

.content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--foreground);
}

.content h3 {
    font-size: 1.35rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.content h4 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

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

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

.content a:hover {
    color: var(--second-highlight);
}

.content ul, .content ol {
    margin-left: 2rem;
    margin-bottom: 1.25rem;
}

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

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

.content pre {
    background: var(--background-elevated);
    padding: 1.5rem;
    border-radius: 6px;
    overflow-x: auto;
    margin: 1.5rem 0;
    font-family: 'Fira Code', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
}

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

.content blockquote {
    border-left: 3px solid var(--main-highlight);
    padding-left: 1.5rem;
    margin: 1.5rem 0;
    color: var(--comment);
    font-style: italic;
}

.content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 2rem auto;
    border-radius: 6px;
}

.content .code-block-wrapper {
    position: relative;
    margin: 1.5rem 0;
}

.content .code-block-header {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    display: flex;
    gap: 0.5rem;
    align-items: center;
    z-index: 10;
}

.content .code-block-lang {
    padding: 0.25rem 0.5rem;
    background: var(--purple);
    color: var(--background);
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.3;
    transition: opacity 0.2s;
}

.content .code-block-lang:hover {
    opacity: 1;
}

.content .code-block-copy {
    padding: 0.25rem 0.5rem;
    background: var(--cyan);
    color: var(--background);
    border: none;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    opacity: 0.3;
    transition: opacity 0.2s;
}

.content .code-block-copy:hover {
    opacity: 1;
}

.content .code-block-copy:active {
    transform: scale(0.95);
}

.content .code-block-copy.copied {
    background: var(--green);
}

.content .code-block-wrapper pre {
    margin: 0;
}

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

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

.content th {
    background: var(--background-elevated);
    font-weight: 600;
}

.content svg.math-inline {
    display: inline-block;
    vertical-align: middle;
    position: relative;
    height: 0.85em;
}

.content figure.math-display-wrapper {
    margin: 1.5rem auto;
    padding: 1rem;
    background: #ffffff;
    border: 1px solid var(--comment);
    display: flex;
    flex-direction: column;
    align-items: center;
    width: fit-content;
    max-width: 100%;
    border-radius: 6px;
}

.content svg.math-display {
    display: block;
}

.content figure.math-display-wrapper figcaption {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    font-style: italic;
    color: #000000;
    text-align: center;
}

.footer {
    border-top: 1px solid var(--comment);
    padding: 2rem 0;
    text-align: center;
    color: var(--comment);
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .header-container, .container {
        padding: 0 1.5rem;
    }
    
    .title {
        font-size: 2rem;
    }
    
    .content h2 {
        font-size: 1.5rem;
    }
}