@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;
}

:root {
    --max-width: 800px;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--foreground, #282a36);
    background: var(--background, #f8f8f2);
}

.nav {
    border-bottom: 1px solid var(--comment, #6272a4);
    padding: var(--spacing-md) 0;
    margin-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, var(--background, #f8f8f2) 0%, var(--comment, #6272a4) 100%);
    background-size: 200% 200%;
    animation: gradient-shift 10s ease infinite;
}

@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    color: var(--main-highlight, #8be9fd);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

.nav-logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-links a {
    text-decoration: none;
    color: var(--foreground, #282a36);
}

.nav-links a:hover {
    color: var(--purple, #bd93f9);
}

.theme-selector {
    display: flex;
    align-items: center;
}

.theme-selector select {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    border: 2px solid var(--main-highlight, #8be9fd);
    border-radius: 4px;
    background: var(--background, #f8f8f2);
    color: var(--foreground, #282a36);
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: capitalize;
}

.theme-selector select:hover {
    background: var(--background-elevated, #44475a);
    transform: scale(1.05);
}

.theme-selector select:focus {
    outline: none;
    box-shadow: 0 0 0 3px var(--main-highlight-alpha, rgba(139, 233, 253, 0.3));
}

.main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md) var(--spacing-xl);
    position: relative;
}

.toc {
    position: fixed;
    left: calc(50% + 350px);
    top: 8rem;
    width: 250px;
    max-height: calc(100vh - 10rem);
    overflow-y: auto;
    padding: var(--spacing-md);
    background: var(--background-elevated);
    /* gba(0, 0, 0, 0.1); */
    border-left: 3px solid var(--third-highlight, #bd93f9);
    backdrop-filter: blur(10px);
    opacity: 0.7;
    transition: opacity 0.3s, top 0.3s, max-height 0.3s;
}

.toc.scrolled {
    top: 2rem;
    max-height: calc(100vh - 10rem);
}

.toc:hover {
    opacity: 1;
}

.toc-nav {
    font-size: 0.85rem;
}

.toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.toc-list li {
    margin: 0;
    padding: 0;
}

.toc-list li::before {
    content: none;
}

.toc-list > li {
    margin-bottom: var(--spacing-sm);
}

.toc-list a {
    display: block;
    padding: 0.25rem 0.5rem;
    color: var(--foreground, #282a36);
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: all 0.2s;
}

.toc-list a:hover {
    color: var(--main-highlight, #ff79c6);
    border-left-color: var(--main-highlight, #ff79c6);
}

.toc-list a.active {
    color: var(--third-highlight, #bd93f9);
    border-left-color: var(--third-highlight, #bd93f9);
    font-weight: 600;
}

.toc-subsections {
    list-style: none;
    margin: 0;
    padding-left: var(--spacing-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.0s ease;
}

.toc-subsections.expanded {
    max-height: 1000px;
}

.article-header {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-sm);
    margin-left: -6%;
}

.article-title {
    font-family: 'Saira', serif;
    font-size: 2.8rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    color: var(--foreground, #282a36);
    position: relative;
    text-shadow: 0.05em 0.1em 1px var(--background);
    line-height: 0.9em;
}

.article-title::after {
    content: "";
    display: block;
    width: 60%;
    height: 0.6rem;
    background: var(--third-highlight, #ff79c6);
    margin-top: 0.05em;
    transform: skewX(-30deg);
    position: relative;
    z-index: -1;
}

.article-meta {
    display: flex;
    gap: var(--spacing-md);
    color: var(--comment, #6272a4);
    font-size: 0.95rem;
}

.article-meta .author::before {
    content: "•";
    margin-right: var(--spacing-sm);
}

.article-tags {
    margin-top: var(--spacing-md);
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.tag {
    background: var(--third-highlight, #bd93f9);
    color: var(--background, #f8f8f2);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.85rem;
    font-weight: 500;
    font-style: italic;
    text-decoration: none;
    display: inline-block;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.tag:hover {
    opacity: 1;
}

.article-content {
    font-size: 1.1rem;
}

.article-content .header-section-number::after {
    content: ".";
    margin-right: 0.5rem;
}

.article-content h2 {
    font-family: 'Saira', serif;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    padding-bottom: 1px;
    font-size: 2.2rem;
    font-weight: 700;
    position: relative;
    margin-left: -6%;
    line-height: 0.9em;
}
.article-content h2:not(:has(.tag)) {
    text-shadow: 0.05em 0.12em 1px var(--background);
}

.article-content h2:not(:has(.tag))::after {
    content: "";
    display: block;
    width: 33%;
    height: 0.4rem;
    background: var(--third-highlight, #ff79c6);
    margin-top: 0.05em;
    transform: skewX(-30deg);
    position: relative;
    z-index: -1;
}

.article-content h3 {
    font-family: 'Saira', serif;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-size: 1.4rem;
    margin-left: -6%;
    line-height: 0.9em;
}

.article-content h4 {
    font-family: 'Saira', serif;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-size: 1.2rem;
    margin-left: -6%;
    line-height: 0.9em;
}

.article-content mark {
    display: inline-block;
    background: none;
    position: relative;
    padding: 0.1em 0.3em;
}

.article-content mark::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--main-highlight, #ff79c6);
    opacity: 0.7;
    transform: skewX(-10deg);
    z-index: -1;
}

.article-content p {
    margin-bottom: var(--spacing-md);
}

.article-content img {
    padding: var(--spacing-md) 0;
    max-width: 100%;
    max-height: 80vh;
    height: auto;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.article-content a {
    color: var(--main-highlight, #ff79c6);
    text-decoration: none;
    border-bottom: 0.2rem solid transparent;
    transition: border-color 0.3s;
}

.article-content pre.ts-code a {
    color: inherit;
    border-bottom: 0.07rem solid var(--foreground-dim);
    opacity: 0.8;
}

.article-content a:hover {
    border-bottom-color: var(--second-highlight, #ff7ac6de);
}

.article-content pre.ts-code a:hover {
    opacity: 1;
}


.article-content a.tag {
    background: var(--third-highlight, #bd93f9);
    color: var(--background, #f8f8f2);
    border-bottom: 0 solid transparent;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.85rem;
    font-weight: 500;
    font-style: italic;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.article-content a.tag:hover {
    opacity: 1;
}

.article-content h2 a.tag {
    background: var(--third-highlight, #bd93f9);
    color: var(--background, #f8f8f2);
    border-bottom: 0 solid transparent;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 1.8rem;
    font-weight: 500;
    font-style: italic;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.article-content h2 a.tag:hover {
    opacity: 1;
}

.article-content .anchor {
    color: var(--second-highlight, #ff79c6);
    opacity: 0.5;
    transition: opacity 0.2s;
}

.article-content h2:hover .anchor,
.article-content h3:hover .anchor,
.article-content h4:hover .anchor {
    opacity: 1;
    border-bottom: 0 solid transparent;
}

.article-content ul, .article-content ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.article-content ul li {
    padding-left: var(--spacing-sm);
}

.article-content input[type="checkbox"] {
    appearance: none;
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--comment, #6272a4);
    border-radius: 0.2rem;
    background: var(--background, #f8f8f2);
    cursor: pointer;
    flex-shrink: 0;
    margin-right: 0.5rem;
}

.article-content input[type="checkbox"]:checked {
    background: var(--good, #8be9fd);
    border-color: var(--good, #8be9fd);
    opacity: 0.7;
}

.article-content input.checkbox-7e[type="checkbox"]:checked {
    background: var(--bad, #ff79c6);
    border-color: var(--bad, #ff79c6);
}


.article-content ul {
    list-style: none;
    margin-left: 1.0rem;
    padding-left: var(--spacing-sm);
}

.article-content li::before {
    content: "-";
    font-size: 2rem;
    margin-top: -0.8rem;
    margin-left: -1.7rem;
    position: absolute;
    color: var(--main-highlight, #ff79c6);
}

.article-content ul li {
    margin-left: 2.6rem;
}

.article-content ul li:has(input) {
    margin-left: 0.5rem;
}

.article-content ul li:has(input)::before {
    content: "";
    display: block;
    height: 0;
}


.article-content li input[type="checkbox"]:checked::after {
    content: "✓";
    position: relative;
    top: -0.1rem;
    left: 0.12rem;
    transform: translate(-50%, -50%);
    color: var(--background, #f8f8f2);
    font-size: 1rem;
    font-weight: bold;
}

.article-content li input.checkbox-7e[type="checkbox"]:checked::after {
    left: 0.18rem;
    content: "x";
    font-weight: 500;
}

.article-content code {
    background: var(--background-elevated, #6272a4);
    display: inline-block;
    font-size: 0.9em;
    line-height: 1.4em;
    font-family: 'Fira Code', monospace;
}

.article-content :not(pre) > code::after {
    content: "";
    /* border-bottom: 0.25rem dashed var(--second-highlight, #ff79c6); */
    height: 0.2em;
    background-image: linear-gradient(to right, var(--second-highlight) 70%, rgba(255,255,255,0) 0%);
    background-position: bottom;
    background-size: 1em 0.2em;
    background-repeat: repeat-x;

    margin-top: -0.1em;
    display: block;
    position: relative;
    transform: skewX(-10deg);
    opacity: 0.8;
}

.article-content pre {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    border-radius: 0;
    overflow-x: auto;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    font-family: 'Fira Code', monospace;
    position: relative;
}

.article-content blockquote {
    border-left: 4px solid var(--second-highlight, #bd93f9);
    padding-left: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    color: var(--comment, #6272a4);
    font-style: italic;
    background: rgba(189, 147, 249, 0.05);
    padding: var(--spacing-md);
    border-radius: 0;
}

.article-content table {
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
    color: var(--foreground);
    font-size: 0.95rem;
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
}

.article-content th {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    font-weight: 600;
    border: 1px solid var(--comment, #6272a4);
    background: var(--background-elevated, #e6e6e6);
}

.article-content td {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--comment, #6272a4);
    background: #ffffff22;
}

.article-content svg.math-inline {
    display: inline-block;
    vertical-align: middle;
    position: relative;
    z-index: 1;
    height: 0.85em;
}

.article-content figure.math-display-wrapper {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background: #ffffff;
    border: 1px solid var(--comment, #6272a4);
    display: flex;
    flex-direction: column;
    align-items: center;
    width: fit-content;
    max-width: 100%;
}

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

.article-content figure.math-display-wrapper figcaption {
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    font-style: italic;
    color: #000000;
    text-align: center;
}

.footer {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--comment, #6272a4);
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    text-align: center;
    color: var(--comment, #6272a4);
    font-size: 0.9rem;
}

.article-content pre code, .article-content pre.ts-code {
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
}

.article-content .ts-code .line-number {
    display: none;
    color: var(--foreground-dim);
    font-weight: normal;
    font-style: normal;
    user-select: none;
    text-align: right;
    padding: 0 10px;
}

.article-content .code-block-wrapper {
    position: relative;
    margin: var(--spacing-lg) 0;
}

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

.article-content .code-block-lang {
    padding: 0.05rem 0.3rem;
    background: var(--third-highlight, #bd93f9);
    color: var(--background, #282a36);
    border-radius: 0;
    border: none;
    font-size: 0.65rem;
    font-weight: 600;
    text-decoration: none;
    opacity: 0.3;
    transition: opacity 0.2s;
    transform: skewX(-5deg);
}

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

.article-content .code-block-copy {
    padding: 0.15rem 0.4rem;
    background: var(--background, #8be9fd);
    color: var(--foreground-dim, #282a36);
    border: none;
    border-radius: 0;
    font-size: 0.65rem;
    font-weight: 600;
    cursor: pointer;
    opacity: 0.3;
    transition: opacity 0.2s;
    transform: skewX(-5deg);
}

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

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

.line {
    white-space: pre;
}

.article {
    margin-left: -8%;
    margin-right: 4%;
    padding-left: 14%;
    padding-right: 4%;
}

.article-content pre code {
    background: none;
    padding: 0;
    border-radius: 0;
    font-size: 1em;
}


@media (max-width: 1200px) {
    .article {
        padding-right: 0;
    }
    
    .toc {
        top: 2rem;
        max-height: calc(100vh - 10rem);
        border-left: none;
        display: block;
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        height: 55vh;
        background: var(--background);
        z-index: 1000;
        padding: var(--spacing-xl);
        padding-top: 0.5rem;
        padding-bottom: 0;
        overflow-y: auto;
        opacity: 1;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
        transform: translateY(150vh);
        transition: transform 0.3s ease-out;
    }

    .toc-nav {
        height: 70%;
        overflow: scroll;
        font-size: 1.2rem;
    }
    
    .toc-toggle:hover ~ .toc:not(.mobile-open) {
        transform: translateY(calc(100vh - 120px));
    }
    
    .toc.mobile-open {
        transform: translateY(50vh) !important;
    }
    
    .toc-backdrop {
        display: none;
        position: fixed;
        left: 0;
        top: 0;
        right: 0;
        bottom: 50vh;
        z-index: 999;
    }
    
    .toc-backdrop.active {
        display: block;
    }
    
    .toc-toggle {
        display: block;
        position: fixed;
        bottom: 0.6rem;
        right: 0.6rem;
        width: 3.5rem;
        height: 3.5rem;
        background: var(--third-highlight, #bd93f9);
        color: var(--background, #f8f8f2);
        border: none;
        border-radius: 0;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
        cursor: pointer;
        z-index: 1001;
        font-size: 1.5rem;
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0.7;
        transition: transform 0.2s, opacity 0.2s, z-index 0s;
    }
    
    .toc-toggle:hover {
        transform: skewX(-5deg);
        opacity: 0.9;
    }
    
    .toc-toggle:active {
        transform: skewX(-5deg) scale(0.95);
    }
    
    .toc-toggle.hidden {
        opacity: 0;
        pointer-events: none;
    }
    
    .toc-close {
        display: none;
    }
    
    .toc-handle {
        position: relative;
        left: 50%;
        transform: translateX(-50%);
        width: 3rem;
        height: 0.3rem;
        background: var(--comment, #6272a4);
        border-radius: 1rem;
    }

    .toc-handle-container {
        display: block;
        top: -0.6rem;
        padding-top: 0.5rem;
        padding-bottom: 0.5rem;
        height: 1rem;
        width: 100%;
        position: sticky;
        z-index: 10;
        background: var(--background);
    }
}

@media (min-width: 1201px) {
    .toc-toggle {
        display: none;
    }
    
    .toc-close {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-links {
        gap: var(--spacing-md);
    }

    .article-content {
        font-size: 1rem;
    }
    
    .article-content h2 {
        font-size: 1.75rem;
    }
    
    .article-content h2::before {
        left: 0;
        position: relative;
        margin-right: 0.5rem;
    }
    .article-content th {
        font-size: 0.65rem;
        padding: var(--spacing-sm) var(--spacing-sm);
    }
    .article-content td {
        font-size: 0.65rem;
        padding: var(--spacing-sm) var(--spacing-sm);
    }
    .article-content pre code, .article-content pre.ts-code {
        font-size: 0.75rem;
        padding: var(--spacing-sm) var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .article {
        padding-left: 6%;
        margin-right: 0;
    }

    .article-header, .article-content h2, .article-content h3, .article-content h4 {
        margin-left: 0.2em;
    }

    .article-title {
        font-size: 2rem;
    }

    .article-content th {
        font-size: 0.45rem;
    }
    .article-content td {
        font-size: 0.45rem;
    }
    .article-content pre code, .article-content pre.ts-code {
        font-size: 0.65rem;
    }
}