:root {
    --bg-light: #ffffff;
    --text-light: #212121;
    --link-light: #007bff;
    --link-hover-light: #0056b3;
    --border-light: #dee2e6;
    --shadow-light: rgba(0, 0, 0, 0.1);

    --bg-dark: #2E3440;
    --text-dark: #ECEFF4;
    --link-dark: #81A1C1;
    --link-hover-dark: #88C0D0;
    --border-dark: #4C566A;
    --shadow-dark: rgba(0, 0, 0, 0.2);
}

[data-theme="light"] {
    --bg-color: var(--bg-light);
    --text-color: var(--text-light);
    --link-color: var(--link-light);
    --link-hover-color: var(--link-hover-light);
    --border-color: var(--border-light);
    --shadow-color: var(--shadow-light);
    --hover-bg-color: #f1f3f5;
}

[data-theme="dark"] {
    --bg-color: var(--bg-dark);
    --text-color: var(--text-dark);
    --link-color: var(--link-dark);
    --link-hover-color: var(--link-hover-dark);
    --border-color: var(--border-dark);
    --shadow-color: var(--shadow-dark);
    --hover-bg-color: #434C5E;
}

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    line-height: 1.6;
    margin: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Custom Selection Styles */
::selection {
    background-color: var(--link-color);
    color: var(--bg-color);
}

.container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 1000px;
    width: 100%;
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
}

.main-header, .main-footer {
    flex-shrink: 0;
}

.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-start; /* Aligns content to the top */
    padding-top: 0vh; /* Pushes content down slightly */
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

a,
button,
.theme-toggle,
.code-copy-button,
.scroll-to-top,
#search-open,
#search-clear,
#search-modal-close {
    /* Cursors are handled by JS now */
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.site-title a {
    font-size: 1.25rem;
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.site-title a:hover {
    color: var(--link-hover-color);
    text-decoration: none;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.main-nav a {
    font-weight: bold;
}

.main-nav a,
.post-list .post-item h2 a {
    text-decoration: none;
    padding-bottom: 2px;
    border-bottom: 2px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.main-nav a:hover,
.post-list .post-item h2 a:hover {
    color: var(--link-hover-color);
    border-color: var(--link-hover-color);
    text-decoration: none;
}

.main-footer {
    margin-top: auto;
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-color);
}

.copyright {
    opacity: 0.8;
}

.footer-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-right: 5rem;
}

.social-icons {
    margin-top: 1.5rem;
}

.social-icons a {
    margin-right: 1.5rem;
    color: var(--text-color);
}

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

.social-icons svg {
    width: 20px;
    height: 20px;
}

/* Post list */
.post-list .post-item {
    margin-bottom: 2rem;
}
.post-list .post-item h2 {
    margin: 0 0 0.5rem;
    font-size: 1.5rem;
}
.post-meta {
    font-size: 0.9rem;
    color: #6c757d;
}
[data-theme="dark"] .post-meta {
    color: #D8DEE9;
}
.year-header {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    /* padding-bottom: 0.5rem; */
}
.post-list .year-header:first-of-type {
    margin-top: 0;
}
.post-summary {
    margin-top: 0.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
    opacity: 0.9;
}
.post-summary > :first-child {
    margin-top: 0;
}
.post-summary > :last-child {
    margin-bottom: 0;
}
.continue-reading-link {
    display: inline-block;
    font-weight: 600;
    text-decoration: none;
}
.post-item-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 0.5rem;
}
.post-item-footer > .post-taxonomies-inline {
    margin-top: 0;
}

/* Single post */
.post header {
    margin-bottom: 2rem;
}
.post h1 {
    font-size: 2.5rem;
    margin: 0 0 0.5rem;
}
.update-note {
    background-color: rgba(0, 123, 255, 0.1);
    border-left: 4px solid var(--link-color);
    padding: 1rem 1.5rem;
    margin: 2rem 0;
    border-radius: 4px;
}
[data-theme="dark"] .update-note {
    background-color: rgba(129, 161, 193, 0.1);
}

.update-note pre {
    margin-top: 1rem;
    margin-bottom: 0;
    background-color: rgba(0, 0, 0, 0.05);
    padding: 0.75rem 1rem;
    border-radius: 4px;
}
[data-theme="dark"] .update-note pre {
    background-color: #282c34;
}
.update-note code {
    background: none;
    padding: 0;
}

/* Breadcrumbs */
.breadcrumbs {
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.breadcrumbs ol {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}

.breadcrumbs li {
    display: flex;
    align-items: center;
    color: #6c757d;
}

[data-theme="dark"] .breadcrumbs li {
    color: #9eabbd;
}

.breadcrumbs li:not(:last-child)::after {
    content: '>';
    margin: 0 0.75rem;
}

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

.breadcrumbs a:hover {
    text-decoration: underline;
}

.breadcrumbs .current-page {
    font-weight: 500;
    color: var(--text-color);
}


.single-post-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}
@media (min-width: 1024px) {
    .single-post-container {
        grid-template-columns: minmax(0, 1fr) 240px;
        gap: 3rem;
    }
}

.post-toc-sidebar {
    grid-row: 1; /* Place before post on mobile */
}

@media (min-width: 1024px) {
    .post-toc-sidebar {
        grid-column: 2;
        position: sticky;
        top: 2rem;
        align-self: start;
        max-height: calc(100vh - 4rem);
        overflow-y: auto;
        /* Hide scrollbar */
        scrollbar-width: none; /* Firefox */
    }
    .post-toc-sidebar::-webkit-scrollbar {
        display: none; /* Safari, Chrome */
    }

    .post {
        grid-column: 1;
        grid-row: 1;
    }
}

/* New TOC Styles */
.post-toc-sidebar .toc {
    border: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    border-radius: 4px;
}
.post-toc-sidebar .toc .toc-title-mobile {
    margin-top: 0;
    font-size: 1.2rem;
    display: block;
}
.post-toc-sidebar .toc .toc-title-desktop {
    display: none;
}
.post-toc-sidebar .toc ul {
    padding-left: 20px;
    margin: 0;
}
.post-toc-sidebar .toc ul ul {
    padding-left: 20px;
}
.post-toc-sidebar .toc a {
    text-decoration: none;
}
.post-toc-sidebar .toc a:hover {
    text-decoration: underline;
}

@media (min-width: 1024px) {
    .post-toc-sidebar .toc {
        border: none;
        padding: 0;
        border-radius: 0;
        background: transparent;
    }
    .post-toc-sidebar .toc .toc-title-mobile {
        display: none;
    }
    .post-toc-sidebar .toc .toc-title-desktop {
        display: block;
        margin-top: 0;
        margin-bottom: 1rem;
        font-size: 0.85rem;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.05em;
    }
    .post-toc-sidebar .toc ul {
        padding-left: 0;
        list-style: none;
        border-left: 1px dashed var(--border-color);
    }
    .post-toc-sidebar .toc ul ul {
        padding-left: 1rem;
        border-left: none;
    }
    .post-toc-sidebar .toc li {
        margin-bottom: 0.25rem;
    }
    .post-toc-sidebar .toc li a {
        display: block;
        padding: 0.3rem 0;
        font-size: 0.9rem;
        color: #6c757d;
        padding-left: 1rem;
        transition: color 0.2s ease;
    }
    .post-toc-sidebar .toc li a:hover {
        color: var(--link-hover-color);
        text-decoration: underline;
    }
    [data-theme="dark"] .post-toc-sidebar .toc li a {
        color: #9eabbd;
    }
    [data-theme="dark"] .post-toc-sidebar .toc li a:hover {
        color: var(--link-hover-color);
    }
}

/* Post Navigation */
.post-navigation {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

@media (min-width: 1024px) {
    .post-navigation {
        grid-column: 1; /* Stay in the main content column */
    }
}

.post-navigation a {
    display: flex;
    flex-direction: column;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-decoration: none;
    transition: background-color 0.2s ease, border-color 0.2s ease;
    height: 100%;
}

.post-navigation a:hover {
    background-color: var(--hover-bg-color);
    text-decoration: none;
    border-color: var(--link-color);
}

.post-navigation .next-post {
    text-align: right;
    align-items: flex-end;
}

.post-navigation .prev-post {
    text-align: left;
    align-items: flex-start;
}

.post-navigation .nav-label {
    font-size: 0.9rem;
    color: #6c757d;
    margin-bottom: 0.5rem;
}
[data-theme="dark"] .post-navigation .nav-label {
    color: #D8DEE9;
}

.post-navigation .nav-title {
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.post-navigation .nav-date {
    font-size: 0.8rem;
    color: #6c757d;
}
[data-theme="dark"] .post-navigation .nav-date {
    color: #9eabbd;
}

/* Prose content styling */
.prose {
    max-width: 65ch;
}
.prose p {
    margin-bottom: 1.5rem;
}

.prose h2, .prose h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.prose figure {
    margin: 2rem auto;
}
.prose figure img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    display: block;
}
.prose figcaption {
    text-align: center;
    font-size: 0.9rem;
    color: #6c757d;
    margin-top: 0.5rem;
}

/* Theme toggle */
.theme-toggle {
    cursor: pointer;
}
.theme-toggle svg {
    width: 14px;
    height: 14px;
    color: var(--text-color);
    transition: transform 0.3s ease;
}
.theme-toggle:hover svg {
    transform: scale(1.1) rotate(15deg);
}

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

/* Code blocks and copy button */
.code-block-wrapper {
    position: relative;
    margin: 2rem 0;
}

pre {
    padding: 1.25rem;
    border-radius: 6px;
    overflow-x: auto;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
}

[data-theme="light"] pre {
    background-color: #fff;
}

[data-theme="dark"] pre {
    background-color: #282c34;
}

.code-copy-button {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background-color: #e9ecef;
    color: #495057;
    border: 1px solid #ced4da;
    border-radius: 4px;
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s ease, background-color 0.2s ease;
    z-index: 1;
}

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

.code-copy-button:hover {
    background-color: #dee2e6;
}

[data-theme="dark"] .code-copy-button {
    background-color: #4C566A;
    color: #ECEFF4;
    border-color: #5E697E;
}

[data-theme="dark"] .code-copy-button:hover {
    background-color: #5E697E;
}

/* Floating Scroll to top button */
.scroll-to-top {
    position: fixed;
    bottom: 1.7rem;
    right: 18rem;
    background-color: transparent;
    border: none;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    text-decoration: none;
    box-shadow: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease, color 0.2s ease;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-color);
}

.scroll-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top:hover {
    color: var(--link-hover-color);
    text-decoration: none;
}

/* Search Modal */
.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 10vh;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
    backdrop-filter: blur(3px);
}

.search-modal.visible {
    opacity: 1;
    visibility: visible;
}

.search-modal-content {
    width: 100%;
    max-width: 600px;
    background-color: var(--bg-color);
    border-radius: 8px;
    box-shadow: 0 8px 32px var(--shadow-color);
    transform: scale(0.95);
    transition: transform 0.25s ease;
}

.search-modal.visible .search-modal-content {
    transform: scale(1);
}

.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    padding: 0.75rem;
}

.search-icon {
    position: absolute;
    left: 1.75rem;
    width: 20px;
    height: 20px;
    stroke-width: 2.5;
    z-index: 1;
    pointer-events: none;
    color: #6c757d;
}

[data-theme="dark"] .search-icon {
    color: #9eabbd;
}


#search-input {
    width: 100%;
    height: 56px;
    padding: 0.75rem 3.5rem; /* top/bottom left/right */
    font-size: 1.1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    outline: none;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    background-color: var(--bg-color);
}

[data-theme="light"] #search-input {
    color: var(--text-light);
}

[data-theme="light"] #search-input::placeholder {
    color: #adb5bd;
}

[data-theme="dark"] #search-input {
    background-color: #3B4252;
    color: var(--text-dark);
}

[data-theme="dark"] #search-input::placeholder {
    color: #9eabbd;
}

#search-input:focus {
    border-color: var(--link-color);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--link-color) 25%, transparent);
}

.search-clear-button {
    position: absolute;
    right: 1.75rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    line-height: 1;
    padding: 0.5rem;
    margin: -0.5rem;
    cursor: pointer;
    color: var(--text-color);
    opacity: 0.7;
    transition: opacity 0.2s ease;
    display: none;
}

.search-input-wrapper.has-text .search-clear-button {
    display: block;
}

.search-clear-button:hover {
    opacity: 1;
}

.search-modal-close {
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    color: #fff;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.search-modal-close:hover {
    opacity: 1;
}

.search-modal-close svg {
    width: 32px;
    height: 32px;
    stroke-width: 2.5;
}

#search-results {
    padding: 0 0.5rem 0.5rem;
    max-height: 60vh;
    overflow-y: auto;
    display: none; /* Managed by JS */
}

.search-result-item {
    border-radius: 4px;
}

.search-result-item a {
    display: block;
    text-decoration: none;
    color: var(--text-color);
    padding: 0.75rem 1rem;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.search-result-item a:hover,
.search-result-item a.active {
    background-color: var(--hover-bg-color);
    text-decoration: none;
}

.search-result-title {
    font-weight: 600;
    font-size: 1.05rem;
    margin-bottom: 0.25rem;
}

.search-result-meta {
    font-size: 0.85rem;
    color: #6c757d;
    margin-bottom: 0.25rem;
}

.search-result-snippet {
    font-size: 0.85rem;
    color: #6c757d;
    line-height: 1.4;
}
.search-result-snippet mark {
    background-color: color-mix(in srgb, var(--link-color) 20%, transparent);
    color: var(--text-color);
    padding: 1px 0;
}

[data-theme="dark"] .search-result-meta,
[data-theme="dark"] .search-result-snippet {
    color: #9eabbd;
}

.search-result-item.no-results {
    text-align: center;
    color: #6c757d;
    padding: 2rem 1rem;
    font-size: 0.9rem;
}

[data-theme="dark"] .search-result-item.no-results {
    color: #9eabbd;
}
.no-results svg {
    width: 32px;
    height: 32px;
    margin-bottom: 0.75rem;
    opacity: 0.5;
}

.search-modal-footer {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    padding: 0.75rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: #6c757d;
}
[data-theme="dark"] .search-modal-footer {
    color: #9eabbd;
}
.keyboard-hint kbd {
    background-color: var(--hover-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    padding: 2px 4px;
    font-family: inherit;
    font-size: 0.75rem;
    margin: 0 2px; /* Adds a small gap around keys */
}


/* Post Footer (Author & Taxonomies) */
.post-footer {
    margin-top: 2.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

/* Author Box */
.author-box {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.author-image img {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    object-fit: cover;
}

.author-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #6c757d;
}
[data-theme="dark"] .author-label {
    color: #9eabbd;
}

.author-name {
    margin: 0.25rem 0 0.5rem;
    font-size: 1.3rem;
    font-weight: 700;
}

.author-bio {
    margin: 0 0 1rem;
    font-size: 0.85rem;
    color: var(--text-color);
    opacity: 0.9;
}

.author-socials {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.author-socials a {
    color: var(--link-color);
    transition: color 0.2s ease;
}

.author-socials a:hover {
    color: var(--link-hover-color);
    text-decoration: none;
}

.author-socials svg {
    width: 20px;
    height: 20px;
}


/* Taxonomy Styles */
.post-taxonomies {
    /* Spacing is now handled by .post-footer */
}
.taxonomy-group {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}
.taxonomy-group svg {
    margin-right: 0.5rem;
    color: #6c757d;
}
.taxonomy-label {
    font-weight: 600;
    margin-right: 1rem;
}
.taxonomy-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.taxonomy-list li a {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--hover-bg-color);
    border-radius: 4px;
    text-decoration: none;
    font-size: 0.85rem;
    transition: background-color 0.2s ease, color 0.2s ease;
}
.taxonomy-list li a:hover {
    background-color: var(--link-color);
    color: var(--bg-color);
    text-decoration: none;
}
[data-theme="dark"] .taxonomy-list li a:hover {
    color: var(--bg-dark);
}


/* Inline Taxonomies for list pages */
.post-taxonomies-inline {
    margin-top: 0.75rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.taxonomy-tag {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    text-decoration: none;
    font-size: 0.8rem;
    color: #6c757d;
    transition: border-color 0.2s ease, color 0.2s ease;
}
.taxonomy-tag:hover {
    text-decoration: none;
    border-color: var(--link-color);
    color: var(--link-color);
}
[data-theme="dark"] .taxonomy-tag {
    color: #D8DEE9;
}
[data-theme="dark"] .taxonomy-tag:hover {
    color: var(--link-hover-color);
    border-color: var(--link-hover-color);
}

/* Terms and Taxonomy List Pages */
.taxonomy-header, .page-header {
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
    padding-bottom: 1rem;
}
.taxonomy-header h1, .page-header h1 {
    margin: 0;
}
.taxonomy-header p, .page-header p {
    margin: 0.5rem 0 0;
    color: #6c757d;
}
[data-theme="dark"] .taxonomy-header p,
[data-theme="dark"] .page-header p {
    color: #D8DEE9;
}

.list-page-header {
    margin-bottom: 2rem;
}
.list-page-header h1 {
    margin: 0;
    font-size: 2.5rem;
    font-weight: 700;
}

.terms-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.terms-list li a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    text-decoration: none;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}
.terms-list li a:hover {
    background-color: var(--hover-bg-color);
    border-color: var(--link-color);
    text-decoration: none;
}
.term-count {
    font-size: 0.9rem;
    background-color: var(--border-color);
    padding: 0.1rem 0.5rem;
    border-radius: 4px;
    min-width: 28px;
    text-align: center;
    transition: background-color 0.2s ease;
}
[data-theme="dark"] .terms-list li a:hover {
    background-color: #4c566a;
    border-color: var(--link-hover-color);
}
[data-theme="dark"] .term-count {
    background-color: #4c566a;
}

/* Topics Page */
.topics-container .topic-section {
    margin-bottom: 3rem;
}

.topics-container .topic-section:last-child {
    margin-bottom: 0;
}

.topics-container h2 {
    font-size: 1.5rem;
    margin-top: 0;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

/* 404 Page */
.not-found-container {
    text-align: center;
    margin: auto;
    padding: 2rem;
}

.not-found-title {
    font-size: 6rem;
    font-weight: 700;
    margin: 0;
    line-height: 1;
    color: var(--link-color);
}

.not-found-subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    margin: 1rem 0;
}

.not-found-message {
    max-width: 400px;
    margin: 0 auto 2rem;
    color: #6c757d;
}

[data-theme="dark"] .not-found-message {
    color: #D8DEE9;
}

.button-link {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--link-color);
    color: var(--bg-color);
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.button-link:hover {
    background-color: var(--link-hover-color);
    color: var(--bg-color);
    text-decoration: none;
    transform: translateY(-2px);
}

[data-theme="dark"] .button-link {
    color: var(--bg-dark);
}

[data-theme="dark"] .button-link:hover {
    color: var(--bg-dark);
}


/* --- Integrated highlight.js Themes --- */

/* Light Theme: GitHub */
[data-theme="light"] pre code.hljs{display:block;overflow-x:auto;padding:0}[data-theme="light"] code.hljs{padding:3px 5px}[data-theme="light"] .hljs{color:#24292e;background:transparent}[data-theme="light"] .hljs-doctag,.hljs-keyword,.hljs-meta .hljs-keyword,.hljs-template-tag,.hljs-template-variable,.hljs-type,.hljs-variable.language_{color:#d73a49}[data-theme="light"] .hljs-title,.hljs-title.class_,.hljs-title.class_.inherited__,.hljs-title.function_{color:#6f42c1}[data-theme="light"] .hljs-attr,.hljs-attribute,.hljs-literal,.hljs-meta,.hljs-number,.hljs-operator,.hljs-selector-attr,.hljs-selector-class,.hljs-selector-id,.hljs-variable{color:#005cc5}[data-theme="light"] .hljs-meta .hljs-string,.hljs-regexp,.hljs-string{color:#032f62}[data-theme="light"] .hljs-built_in,.hljs-symbol{color:#e36209}[data-theme="light"] .hljs-code,.hljs-comment,.hljs-formula,.hljs-quote{color:#6a737d}[data-theme="light"] .hljs-name,.hljs-section,.hljs-selector-tag,.hljs-subst{color:#22863a}[data-theme="light"] .hljs-emphasis{font-style:italic}[data-theme="light"] .hljs-strong{font-weight:700}[data-theme="light"] .hljs-addition,.hljs-bullet,.hljs-link{color:#22863a}[data-theme="light"] .hljs-deletion{color:#b31d28}

/* Dark Theme: Atom One Dark */
[data-theme="dark"] pre code.hljs{display:block;overflow-x:auto;padding:0}[data-theme="dark"] code.hljs{padding:3px 5px}[data-theme="dark"] .hljs{color:#abb2bf;background:transparent}[data-theme="dark"] .hljs-comment,.hljs-quote{color:#5c6370;font-style:italic}[data-theme="dark"] .hljs-doctag,.hljs-formula,.hljs-keyword{color:#c678dd}[data-theme="dark"] .hljs-name,.hljs-section,.hljs-selector-tag,.hljs-subst{color:#e06c75}[data-theme="dark"] .hljs-literal{color:#56b6c2}[data-theme="dark"] .hljs-addition,.hljs-attribute,.hljs-regexp,.hljs-string{color:#98c379}[data-theme="dark"] .hljs-attr,.hljs-bullet,.hljs-link,.hljs-meta .hljs-string,.hljs-symbol,.hljs-template-tag,.hljs-template-variable,.hljs-variable{color:#61aeee}[data-theme="dark"] .hljs-meta,.hljs-selector-attr,.hljs-selector-pseudo{color:#d19a66}[data-theme="dark"] .hljs-built_in,.hljs-title.class_{color:#e6c07b}[data-theme="dark"] .hljs-number,.hljs-selector-class,.hljs-selector-id,.hljs-title.function_,.hljs-type{color:#d19a66}[data-theme="dark"] .hljs-strong{font-weight:700}[data-theme="dark"] .hljs-emphasis{font-style:italic}[data-theme="dark"] .hljs-deletion{color:#e06c75}

/* Diff Highlighting Enhancement */
.hljs-deletion,
.hljs-addition {
    display: block;
    padding-left: 1.25rem;
    margin-left: -1.25rem;
    padding-right: 1.25rem;
    margin-right: -1.25rem;
}

[data-theme="light"] .hljs-deletion {
    background-color: #ffeef0;
}
[data-theme="light"] .hljs-addition {
    background-color: #e6ffed;
}

[data-theme="dark"] .hljs-deletion {
    background-color: rgba(224, 108, 117, 0.15);
}
[data-theme="dark"] .hljs-addition {
    background-color: rgba(152, 195, 121, 0.15);
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .search-modal-footer {
        display: none;
    }
}

@media (max-width: 768px) {
    /* General Layout */
    .container {
        padding: 2rem 1.5rem;
    }

    .main-header {
        margin-bottom: 2rem;
    }

    .homepage-content {
        margin-top: 1rem;
        display: flex;
        flex-direction: column;
    }

    /* Typography */
    .list-page-header h1,
    .post h1 {
        font-size: 2rem;
    }

    .post-list .year-header {
        font-size: 1.25rem;
        margin-top: 1.5rem;
        margin-bottom: 1rem;
    }

    .post-list .post-item h2 {
        font-size: 1.25rem;
    }

    /* Spacing */
    .post-list .post-item {
        margin-bottom: 2rem;
    }

    /* Post Navigation */
    .post-navigation {
        grid-template-columns: 1fr;
    }

    .post-navigation .next-post {
        text-align: left;
        align-items: flex-start;
    }

    /* Floating & Modal Elements */
    .scroll-to-top {
        width: 36px;
        height: 36px;
        bottom: 5rem; /* Raise it higher to avoid footer overlap */
        right: 1.7rem;
    }

    .search-modal-content {
        width: calc(100% - 2rem);
    }

    .search-modal-close {
        display: none;
    }

    /* On mobile, clear button is always visible and acts as close button */
    .search-clear-button,
    .search-input-wrapper.has-text .search-clear-button {
        display: block;
    }

    .footer-actions {
        margin-right: 1rem;
    }
}