:root {
    --primary-bg: #ffffff;
    --text-color: #000000;
    --accent-color-grey: #555555;
    --accent-color: #0000ff;
    --accent-hover: #0000cc;
    --border-color: #e1e8ed;
    --sidebar-width: 10%;
    --max-width: 960px;
    --page-padding: clamp(1rem, 2vw, 2rem);
    --mobile-page-padding: var(--page-padding);
    --container-max-width: var(--max-width);
    --container-inline-padding: var(--page-padding);
    --font-big: 2rem;
    --font-small: 1rem;
    --font-medium: 1rem;
    --font-tiny: 0.9rem;
    --font-code-size: 1rem;
    --spacing-tiny: 0.1rem;
    --spacing-tight: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 0.75rem;
    --spacing-lg: 1rem;
    --spacing-xl: 2rem;
    --title-break-line-color: #000000;
    --title-break-margin: 3rem;
    --code-bg: #e2e2e2;
    --code-border: #c0c0c0;
    --profile-sticky-top: 60px;
    --surface-hover: #e8e8e8;
    --surface-muted: #f5f5f5;
    --surface-subtle: #fafafa;
}

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

html {
    overflow-y: scroll;
    scrollbar-gutter: stable;
}

body {
    font-size: var(--font-small);
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-weight: 400;
    line-height: 1.4;
    color: var(--text-color);
    background-color: var(--primary-bg);
}

/* Header Navigation */
.site-header {
    border-bottom: 1px solid var(--accent-hover);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--accent-color);
    width: 100%;
}

.site-header nav {
    display: flex;
    gap: var(--spacing-lg);
    row-gap: var(--spacing-tight);
    align-items: center;
    flex-wrap: wrap;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-inline-padding);
    justify-content: space-between;
}

.site-nav-links {
    display: flex;
    gap: var(--spacing-lg);
    row-gap: var(--spacing-tight);
    align-items: center;
    flex-wrap: wrap;
}

.site-header nav a {
    color: #ffffff;
    text-decoration: underline;
    font-weight: 400;
    font-size: var(--font-small);
}

.site-header nav a:hover {
    color: #ffffff;
    opacity: 0.8;
}

.site-header nav a.active {
    color: #ffffff;
    opacity: 1;
    font-weight: 600;
    background-color: rgba(255, 255, 255, 0.18);
    border-radius: 0.4rem;
}

.mute-button {
    background-color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 0.5rem;
    color: var(--accent-color);
    font-size: var(--font-small);
    cursor: pointer;
    padding: var(--spacing-tight) var(--spacing-sm);
    flex-shrink: 0;
    margin-left: auto;
}

.mute-button:hover {
    opacity: 0.85;
}

/* Main Container */
.main-container,
.single-content {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.main-container {
    padding: var(--container-inline-padding);
    display: flex;
    gap: var(--spacing-lg);
}

/* Profile Sidebar */
.profile-sidebar {
    width: var(--sidebar-width);
    min-width: 300px;
    position: sticky;
    top: var(--profile-sticky-top);
    align-self: flex-start;
}

.profile-photo {
    width: 100%;
    max-width: 120px;
    aspect-ratio: 1;
    border-radius: 8px;
    object-fit: cover;
    margin-bottom: var(--spacing-sm);
    border: 2px solid var(--accent-color);
}

.profile-name,
.group-title,
.single-title {
    font-size: var(--font-big);
    font-weight: 600;
}

.profile-name {
    margin-bottom: var(--spacing-tight);
    color: var(--text-color);
}

.profile-tagline {
    margin-top: 0.1rem;
}

.profile-intro,
.profile-description,
.bookmark-description,
.project-description,
.video-description {
    font-size: var(--font-small);
    color: var(--text-color);
}

.profile-intro,
.profile-description {
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.profile-links {
    list-style: none;
    margin-top: var(--spacing-xl);
}

.profile-links li {
    margin-bottom: 0;
}

.profile-links a {
    display: flex;
    align-items: center;
    gap: var(--spacing-tight);
    color: var(--accent-color);
    text-decoration: underline;
    font-size: var(--font-small);
    padding: 0;
}

.profile-links a:hover {
    color: var(--accent-hover);
}

.profile-links .icon {
    width: 16px;
    height: 16px;
    display: block;
    flex-shrink: 0;
}

.profile-links .profile-emoji {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    line-height: 1;
}

.profile-contact-text {
    margin-top: var(--spacing-xl);
    color: var(--text-color);
}

.profile-contact-text p+p {
    margin-top: var(--spacing-tight);
}

/* Content Area */
.content-area {
    flex: 1;
    min-width: 0;
}

/* Grouped Content Layout */
.content-groups,
.bookmarks-groups,
.projects-list,
.videos-gallery {
    display: grid;
    grid-template-columns: 1fr;
}

.content-groups {
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

/* Bookmarks Groups - Single Column */
.bookmarks-groups {
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.content-group {
    min-width: 0;
}

.group-title {
    margin-bottom: var(--spacing-tight);
    color: var(--text-color);
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: var(--spacing-tiny);
    text-transform: lowercase;
}

/* Post Item */
.post-item,
.bookmark-item {
    display: flex;
    gap: var(--spacing-sm);
    padding: 0.125rem 0;
    align-items: flex-start;
}

.post-item {
    margin-bottom: 0;
    min-height: 0;
    position: relative;
    cursor: pointer;
}

.post-item a.post-link {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    text-decoration: none;
    z-index: 1;
}

.post-info {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    pointer-events: none;
}

.post-date {
    font-size: var(--font-tiny);
    color: var(--text-color);
    flex-shrink: 0;
    padding-top: 0.15rem;
}

.post-title {
    font-size: var(--font-small);
    font-weight: 400;
    margin: 0;
    flex: 1;
    overflow-wrap: break-word;
}

.post-title a {
    pointer-events: none;
}

/* Bookmark Item */
.bookmark-item {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    padding: 0.125rem 0;
    align-items: flex-start;
    width: 100%;
    min-width: 0;
}

.bookmark-item:last-child {
    margin-bottom: 0;
}

.bookmark-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    vertical-align: middle;
    align-self: center;
}

.bookmark-info {
    flex: 1;
    min-width: 0;
    max-width: 100%;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-tight);
}

.bookmark-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: nowrap;
    width: 100%;
    min-width: 0;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.bookmark-date {
    font-size: var(--font-small);
    color: var(--text-color);
    font-weight: 400;
    flex-shrink: 0;
}

.bookmark-description {
    line-height: 1.4;
    margin-bottom: 0;
    overflow-wrap: anywhere;
}

.bookmark-url {
    font-size: var(--font-small);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

/* Projects */
.projects-list {
    gap: var(--spacing-lg);
}

.project-item {
    display: grid;
    grid-template-columns: 100px minmax(0, 1fr);
    gap: var(--spacing-lg);
    align-items: start;
    padding: 0;
}

.project-image-link {
    display: block;
    width: 100px;
    aspect-ratio: 1;
    flex-shrink: 0;
    overflow: hidden;
    align-self: center;
}

.project-image {
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 8px;
    object-fit: cover;
    border: 2px solid var(--border-color);
    background-color: var(--surface-muted);
}

.project-info {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.project-title {
    overflow-wrap: anywhere;
}

.project-url {
    font-size: var(--font-small);
    color: var(--accent-color-grey);
    overflow-wrap: anywhere;
}

.project-description {
    line-height: 1.45;
    margin: 0;
}

/* Videos Gallery */
.videos-gallery {
    gap: var(--spacing-md);
}

.video-item {
    padding: 0;
}

.video-embed {
    position: relative;
    padding-bottom: 56.25%;
    /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    border-radius: 4px;
    margin-bottom: var(--spacing-tight);
}

.video-embed iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-title {
    font-size: var(--font-small);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-tight);
}

/* Single Post/Page */
.single-content {
    padding: var(--container-inline-padding);
}

.single-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--spacing-lg);
    margin-bottom: var(--title-break-margin);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--title-break-line-color);
    flex-wrap: nowrap;
}

.single-title {
    line-height: 1.3;
    margin: 0;
    flex: 1;
}

.single-meta {
    font-size: var(--font-small);
    color: var(--text-color);
    white-space: nowrap;
    flex-shrink: 0;
    text-align: right;
}

.single-content article {
    line-height: 1.6;
    font-family: 'Times New Roman', Times, serif;
}

.post-item:hover,
.bookmark-item:hover,
.project-item:hover {
    background-color: var(--surface-hover);
}

.post-title,
.post-title a,
.bookmark-url,
.project-title,
.single-content article a {
    color: var(--accent-color);
    text-decoration: underline;
}

.post-title a:hover,
.bookmark-header:hover .bookmark-url,
.project-title:hover,
.single-content article a:hover {
    color: var(--accent-hover);
}

.single-content article :is(h1, h2, h3, h4, h5, h6) {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    scroll-margin-top: 5rem;
    position: relative;
}

.single-content article .heading-anchor {
    margin-left: 0.35rem;
    color: var(--accent-color);
    text-decoration: none;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.single-content article :is(h1, h2, h3, h4, h5, h6):is(:hover, :focus-within) .heading-anchor {
    opacity: 1;
}

.single-content article .heading-anchor:hover {
    color: var(--accent-hover);
}

.single-content article h1,
.single-content article h2,
.single-content article h3 {
    font-size: var(--font-big);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.single-content article h1,
.single-content article h2 {
    margin-top: var(--spacing-lg);
}

.single-content article h3 {
    margin-top: var(--spacing-md);
}

.single-content article p {
    margin-bottom: var(--spacing-xl);
    font-size: var(--font-small);
}

/* Inline code */
.single-content article code {
    background-color: var(--code-bg);
    border: 1px solid var(--code-border);
    padding: 0.1em 0.2em;
    margin: 0;
    border-radius: 2px;
    font-size: var(--font-code-size);
    font-family: 'Courier New', Courier, monospace;
}

/* Code blocks without language (plain pre) */
.single-content article pre {
    background-color: var(--code-bg);
    border: 1px solid var(--code-border);
    padding: var(--spacing-sm);
    margin: var(--spacing-md) 0;
    border-radius: 2px;
    overflow-x: visible;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: break-word;
    line-height: 1.2;
    font-size: var(--font-code-size);
}

/* Code blocks - remove background/border from code inside pre (handled by .chroma or pre) */
.single-content article pre code {
    background: none;
    border: none;
    padding: 0;
    margin: 0;
    white-space: inherit;
    overflow-wrap: inherit;
    word-break: inherit;
    font-size: var(--font-code-size);
}

.single-content article img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin: var(--spacing-md) 0;
}

/* Tables */
.single-content article table {
    border-collapse: collapse;
    width: 100%;
    margin: var(--spacing-md) 0;
    font-size: var(--font-small);
}

.single-content article table :is(th, td) {
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm);
}

.single-content article table th {
    background-color: var(--surface-muted);
    text-align: left;
    font-weight: 600;
}

.single-content article table tr:nth-child(even) {
    background-color: var(--surface-subtle);
}

/* Lists */
.single-content article ul,
.single-content article ol {
    margin-left: 1.5em;
    margin-bottom: var(--spacing-sm);
    padding-left: 0;
}

.single-content article ul {
    list-style-type: disc;
}

.single-content article ol {
    list-style-type: decimal;
}

.single-content article ul ul {
    list-style-type: circle;
    margin-bottom: 0;
}

.single-content article ul ul ul {
    list-style-type: square;
}

.single-content article ol ol {
    list-style-type: lower-alpha;
    margin-bottom: 0;
}

.single-content article ol ol ol {
    list-style-type: lower-roman;
}

.single-content article li {
    margin-bottom: var(--spacing-tight);
    line-height: 1.5;
}

.single-content article li>p {
    margin-bottom: var(--spacing-tight);
}

/* Blockquotes */
.single-content article blockquote {
    border-left: 3px solid var(--accent-color-grey);
    padding-left: var(--spacing-md);
    margin: var(--spacing-md) 0;
    color: var(--text-color);
    font-style: italic;
}

.single-content article blockquote p {
    margin-bottom: var(--spacing-tight);
}

/* Horizontal Rules */
.single-content article hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: var(--spacing-lg) 0;
}

/* Task Lists */
.single-content article .task-list-item {
    list-style-type: none;
    margin-left: -1.5em;
}

.single-content article .task-list-item input[type="checkbox"] {
    margin-right: var(--spacing-sm);
}

/* Mobile Responsive */
@media (max-width: 1024px) {
    body {
        font-size: var(--font-medium);
    }

    .main-container {
        flex-direction: column;
    }

    .profile-sidebar {
        width: 100%;
        min-width: 0;
        position: static;
        text-align: center;
        margin-bottom: var(--spacing-md);
    }

    .profile-photo {
        margin-left: auto;
        margin-right: auto;
    }

    .profile-links a {
        justify-content: center;
    }

    .bookmark-header {
        flex-wrap: wrap;
        align-items: flex-start;
    }

    .bookmark-url {
        width: 100%;
        white-space: normal;
        overflow-wrap: break-word;
    }

    .project-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .site-header nav {
        gap: var(--spacing-sm);
        align-items: center;
    }

    .site-header nav a {
        font-size: var(--font-medium);
    }

    .site-nav-links {
        gap: var(--spacing-sm);
    }

    .mute-button {
        margin-left: 0;
    }

    .single-content {
        padding: var(--mobile-page-padding);
    }

    .single-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .single-meta {
        text-align: left;
        white-space: normal;
    }

    .single-content article table {
        display: block;
        overflow-x: auto;
    }

    .single-content article code {
        overflow-wrap: break-word;
    }
}

/* KaTeX Math Styling */
.single-content article .katex,
.single-content article .katex-display .katex {
    font-size: 0.85rem !important;
}