/* ============================================
   STACKTOWER BLOGPOST - Thinking Machines Style
   Inspired by: thinkingmachines.ai
   ============================================ */

/* === TYPOGRAPHY === */
:root {
    /* Colors - Exact TM palette */
    --text-primary: #000000;
    --text-secondary: #333333;
    --text-muted: #666666;
    --link-color: #0066cc;
    --link-hover: #004499;
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --bg-tertiary: #f5f5f5;
    --bg-code: #f8f8f8;
    --border-color: #e5e5e5;
    --border-light: #f0f0f0;
    --accent-color: #0066cc;
    --highlight-bg: #fffbeb;

    /* Typography */
    --font-serif: 'Crimson Text', 'Georgia', 'Times New Roman', serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', 'Consolas', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;

    /* Spacing */
    --content-width: 660px;
    --line-height: 1.5;
    --paragraph-spacing: 1.333rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-serif);
    font-size: 17px;
    line-height: var(--line-height);
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* === LAYOUT === */
.container {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Wide container for content with sidenotes */
article {
    position: relative;
}

@media (min-width: 1200px) {
    .container {
        max-width: 970px; /* Wider to accommodate sidenotes */
    }

    article {
        max-width: var(--content-width);
        margin: 0 auto;
    }
}

@media (min-width: 1400px) {
    .container {
        max-width: 990px;
    }
}

@media (min-width: 1600px) {
    .container {
        max-width: 1010px;
    }

    .sidenote,
    .marginnote {
        width: 250px;
        margin-right: -290px;
    }
}

@media (min-width: 1800px) {
    .container {
        max-width: 1030px;
    }

    .sidenote,
    .marginnote {
        width: 280px;
        margin-right: -320px;
    }
}

/* === HEADER/HERO === */
.hero {
    background: var(--bg-primary);
    padding: 1.5rem 0 0;
    border-bottom: none;
    text-align: center;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 30px;
    font-weight: 600;
    margin-bottom: 0.5rem;
    margin-top: 1.5rem;
    letter-spacing: -0.025em;
    line-height: 1.4;
    color: var(--text-primary);
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 20px;
    font-weight: 400;
    color: var(--text-secondary);
    margin-top: 0.75rem;
    margin-bottom: 1rem;
    font-style: italic;
    line-height: 1.5;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-author {
    font-family: var(--font-sans);
    font-size: 13px;
    line-height: 15px;
    letter-spacing: 0.2px;
    color: var(--text-muted);
    margin-top: 1rem;
    margin-bottom: 2rem;
    font-weight: 400;
}

.hero-author a {
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 1px solid var(--border-color);
    transition: border-color 0.2s;
}

.hero-author a:hover {
    border-bottom-color: var(--link-color);
}

/* Hero comparison layout */
.hero-comparison {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.hero-item {
    text-align: center;
    flex: 0 1 auto;
}

.hero-item a {
    display: block;
}

.hero-tldr {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 240px;
    gap: 0.5rem;
}

.hero-tldr p {
    font-size: 14px;
    font-family: var(--font-sans);
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0 0 0.75rem 0;
    font-weight: 400;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    align-items: stretch;
    justify-content: center;
    margin-bottom: 0.5rem;
    width: 100%;
    max-width: 240px;
}

.hero-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: #d8d8d8;
    color: #000;
    text-decoration: none;
    border-radius: 20px;
    border: 1.5px solid #000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    font-size: 14px;
    font-family: var(--font-sans);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
    min-height: 40px;
    box-sizing: border-box;
}

.hero-cta:hover {
    background: #c0c0c0;
    border-color: var(--text-secondary);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.12);
    text-decoration: none;
}

.hero-cta svg {
    flex-shrink: 0;
}

.hero-cta.nav-tab {
    background: #d8d8d8 !important;
    border: 1.5px solid #000 !important;
    padding: 0.5rem 1rem !important;
    color: #000 !important;
}

.hero-cta.nav-tab:hover {
    background: #c0c0c0 !important;
    color: #000 !important;
}

.hero-github {
    background: #24292e;
    color: white;
    border-color: #000;
}

.hero-github:hover {
    background: #2f363d;
    border-color: #000;
    color: white;
}

.hero-arrow {
    font-size: 2.5rem;
    color: var(--text-muted);
    font-weight: 300;
}

.xkcd-image {
    height: 380px;
    width: auto;
    border: 1px solid var(--border-color);
    background: white;
    padding: 16px;
    display: block;
    object-fit: contain;
}

.hero-tower {
    height: 380px;
    width: auto;
    display: block;
}

.hero-caption {
    margin-top: 8px;
    font-size: 14px;
    color: var(--text-muted);
}

.hero-caption a {
    color: var(--text-muted);
    text-decoration: none;
}

.hero-caption a:hover {
    text-decoration: underline;
}

.hero-caption strong {
    font-family: var(--font-mono);
    color: var(--text-secondary);
}

@media (max-width: 600px) {
    .hero-comparison {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-tldr {
        max-width: 280px;
    }
    
    .hero-tldr p {
        font-size: 13px;
    }
    
    .hero-arrow {
        transform: rotate(90deg);
        font-size: 2rem;
    }
    
    .xkcd-image {
        height: auto;
        width: 80vw;
        max-width: 340px;
    }
    
    .hero-tower {
        height: auto;
        width: 75vw;
        max-width: 300px;
    }
}

/* === MAIN CONTENT === */
main {
    padding: 1rem 0;
}

article {
    font-size: inherit;
}

section {
    margin-bottom: 0;
}

/* === HEADINGS === */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.4;
    margin-top: 0;
    margin-bottom: 0.6em;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

h2 {
    font-size: 1.45rem;
    margin-top: 1.6em;
    margin-bottom: 0.6em;
    border-bottom: none;
    padding-bottom: 0;
}

h3 {
    font-size: 1.35rem;
    margin-top: 1.4em;
    margin-bottom: 0.5em;
    font-weight: normal;
    font-style: italic;
}

h4 {
    font-size: 0.97rem;
    margin-top: 1.4em;
    margin-bottom: 0.7em;
    font-weight: normal;
    font-style: italic;
}

/* === PARAGRAPHS & TEXT === */
p {
    margin-bottom: var(--paragraph-spacing);
    margin-top: 0;
}

strong, b {
    font-weight: 700;
    color: var(--text-primary);
}

em, i {
    font-style: italic;
}

/* === SIDENOTES & FOOTNOTES === */
/* Thinking Machines style side notes */
.sidenote,
.marginnote {
    float: right;
    clear: right;
    margin-right: -280px;
    width: 240px;
    margin-top: 0.3rem;
    margin-bottom: 20px;
    font-size: 0.9rem;
    line-height: 1.4;
    vertical-align: baseline;
    position: relative;
    font-family: var(--font-sans);
    color: var(--text-secondary);
}

.sidenote-number {
    counter-increment: sidenote-counter;
}

.sidenote-number:after,
.sidenote:before {
    position: relative;
    vertical-align: baseline;
}

.sidenote-number:after {
    content: counter(sidenote-counter);
    font-size: 0.8rem;
    top: -0.5rem;
    left: -0.05rem;
    color: var(--text-muted);
}

.sidenote:before {
    content: counter(sidenote-counter);
    padding-right: 0.2rem;
    font-size: 0.8rem;
    top: -0.4rem;
    left: -0.1rem;
    color: var(--text-muted);
}

/* Label to toggle sidenote on mobile */
label.sidenote-number {
    display: inline;
    cursor: pointer;
}

label.margin-toggle:not(.sidenote-number) {
    display: none;
}

/* Checkbox to control sidenote visibility on mobile */
.margin-toggle {
    display: none;
}

/* Mobile: hide sidenotes by default, show when checkbox checked */
@media (max-width: 1199px) {
    .sidenote,
    .marginnote {
        display: none;
    }

    .margin-toggle:checked + .sidenote,
    .margin-toggle:checked + .marginnote {
        display: block;
        float: left;
        left: 1rem;
        clear: both;
        width: 95%;
        margin: 1rem 2.5%;
        position: relative;
        background: var(--bg-secondary);
        padding: 1em;
        border-radius: 4px;
        border-left: 3px solid var(--link-color);
    }

    label.margin-toggle:not(.sidenote-number) {
        display: inline;
        color: var(--link-color);
        cursor: pointer;
    }
}

/* Traditional superscript footnotes as fallback */
sup {
    font-size: 0.7em;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
    top: -0.5em;
}

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

/* Footnote references in text */
.footnote-ref {
    text-decoration: none;
    color: var(--link-color);
}

.footnote-ref:hover {
    text-decoration: underline;
}

/* === LINKS === */
a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.2s;
}

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

/* === CODE === */
code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: transparent;
    padding: 0 0.2rem;
    border-radius: 0;
    border: none;
    color: var(--text-primary);
}

pre {
    background: var(--bg-code);
    border: none;
    border-radius: 0.2rem;
    padding: 1rem;
    margin: 0 0 1.333rem;
    overflow-x: auto;
    line-height: 1.4;
    font-size: 13px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
}

pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: 13px;
    line-height: 1.4;
    color: var(--text-secondary);
}

.code-output {
    background: #f0f4f8;
    border-left: 4px solid var(--accent-color);
    padding: 16px 20px;
    margin: 16px 0 32px;
    font-family: var(--font-mono);
    font-size: 16px;
}

.code-output::before {
    content: "Output:";
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

/* === BLOCKQUOTES === */
blockquote {
    border-left: none;
    padding-left: 1.25rem;
    margin: 1.2rem 0 1.2rem 1rem;
    color: var(--text-secondary);
    font-style: normal;
    background: var(--bg-secondary);
    padding: 0 1.25rem;
    border-radius: 0;
}

blockquote p:last-child {
    margin-bottom: 0;
}

blockquote p:first-child {
    margin-top: 0;
}

/* === LISTS === */
ul, ol {
    margin: 1rem 0 1.2rem;
    padding-left: 1.5rem;
    list-style: square;
}

ol {
    list-style: decimal;
    padding-left: 2rem;
}

li {
    margin-bottom: 0.2rem;
    line-height: var(--line-height);
}

li p {
    margin-bottom: 0.2rem;
}

li:last-child {
    margin-bottom: 0;
}

/* === IMAGES & FIGURES === */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

figure {
    margin: 40px 0;
    text-align: center;
}

figcaption {
    margin-top: 12px;
    font-size: 18px;
    color: var(--text-muted);
    font-style: italic;
}

/* === COMPARISON/DEMO BLOCKS === */
.demo-block {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: 4px;
    padding: 1.5em 2em;
    margin: 2em 0;
}

.demo-block h4 {
    margin-top: 0;
    font-size: 18px;
    color: var(--text-primary);
    font-weight: 700;
    font-family: var(--font-sans);
    margin-bottom: 0.75em;
}

.comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2em;
    margin: 2em 0;
}

.comparison-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: 4px;
    padding: 1.5em;
}

.comparison-item h4 {
    margin-top: 0;
    font-size: 16px;
    text-align: center;
    color: var(--text-primary);
    font-weight: 700;
    font-family: var(--font-sans);
    margin-bottom: 1em;
}

.comparison-item p {
    font-family: var(--font-sans);
    font-size: 0.9em;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .comparison {
        grid-template-columns: 1fr;
    }
}

/* === TABLES === */
table {
    width: auto;
    max-width: 100%;
    border-collapse: collapse;
    margin: 2rem auto;
    font-size: 0.95rem;
    font-family: var(--font-sans);
    line-height: 1.5;
}

thead {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

th {
    padding: 0.5rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-sans);
    border: 1px solid var(--border-color);
}

td {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    font-family: var(--font-sans);
    vertical-align: top;
}

tbody tr:hover {
    background: var(--bg-secondary);
}

/* === MATHEMATICAL NOTATION === */
.math-block {
    margin: 2em 0;
    padding: 1.5em;
    background: transparent;
    border-radius: 0;
    text-align: center;
    overflow-x: auto;
}

/* MathJax styling */
.MathJax {
    font-size: 1.1em !important;
}

mjx-container {
    margin: 1em 0;
}

/* === CALLOUT BOXES === */
.callout {
    background: var(--highlight-bg);
    border-left: 4px solid #d97706;
    padding: 1.25em 1.5em;
    margin: 2em 0;
    border-radius: 0;
    font-size: 0.95em;
}

.callout.info {
    background: #eff6ff;
    border-left-color: #3b82f6;
}

.callout.warning {
    background: #fef2f2;
    border-left-color: #ef4444;
}

.callout.success {
    background: #f0fdf4;
    border-left-color: #22c55e;
}

.callout p:last-child {
    margin-bottom: 0;
}

.callout p:first-child {
    margin-top: 0;
}

.callout strong {
    color: var(--text-primary);
}

/* === INTERACTIVE SVG DEMOS === */
.svg-demo {
    margin: 40px 0;
    padding: 32px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-align: center;
}

.svg-demo svg {
    max-width: 100%;
    height: auto;
    display: inline-block;
}

/* === BLOG DIAGRAM FIGURES === */
.diagram-row {
    display: flex;
    justify-content: flex-start;
    align-items: flex-end; /* Align to bottom so captions line up */
    gap: 32px;
    margin: 24px 0;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 12px; /* Space for scrollbar */
    -webkit-overflow-scrolling: touch;
}

/* Center content when it fits */
@media (min-width: 769px) {
    .diagram-row {
        justify-content: center;
    }
}

.diagram-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    flex-shrink: 0; /* Prevent shrinking */
}

.diagram-item img {
    height: auto;
    max-height: 200px; /* Reasonable cap, but fonts stay at natural size */
    min-width: 120px; /* Prevent over-shrinking on mobile */
}

.diagram-item p {
    font-size: 0.85em;
    color: var(--text-muted);
    margin-top: 8px;
    margin-bottom: 0;
    white-space: nowrap; /* Keep captions on one line */
}

/* Mobile: allow wrapping to prevent horizontal scroll */
@media (max-width: 768px) {
    .diagram-row {
        flex-wrap: wrap;
        justify-content: center;
        overflow-x: visible;
        gap: 16px;
    }
    
    .diagram-item {
        flex-shrink: 1;
    }
    
    .diagram-item img {
        max-width: calc(50vw - 24px);
        min-width: 0;
        width: 100%;
    }
}

/* 2x2 grid layout for diagram comparisons */
.diagram-grid-2x2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(140px, 1fr));
    justify-items: center;
    align-items: end;
    gap: 16px 32px;
    margin: 24px 0;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 12px;
}

.diagram-grid-2x2 .diagram-item img {
    min-width: 100px;
}

/* === TABLE OF CONTENTS === */
.toc {
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
    margin: 2rem 0;
    font-family: var(--font-sans);
}

.toc h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-family: var(--font-sans);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 14px;
    color: var(--text-secondary);
}

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

.toc li {
    margin-bottom: 0.25rem;
    line-height: 1.4;
}

.toc a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.toc a:hover {
    color: var(--text-primary);
    text-decoration: underline;
    text-decoration-color: color-mix(in srgb, var(--text-primary) 20%, transparent);
    text-underline-offset: 2px;
}

/* === FOOTER === */

/* === ARTICLE END === */
.article-end {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.article-end-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.article-end-cta .hero-cta {
    padding: 0.5rem 1rem;
    font-size: 14px;
    width: auto;
}

.article-end-divider {
    color: var(--text-muted);
    font-size: 14px;
}

.article-end-cta a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 14px;
    font-family: var(--font-sans);
    color: #000;
    text-decoration: none;
    background: #fef9e7;
    border: 1.5px solid #000;
    border-radius: 20px;
    font-weight: 500;
    transition: all 0.2s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.article-end-cta a:hover {
    background: #fdf3d0;
    border-color: #000;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.12);
    text-decoration: none;
}

.article-end-share {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 3rem;
}

.article-end-share span {
    font-size: 13px;
    font-family: var(--font-sans);
    color: var(--text-muted);
}

/* === CITATION === */
.citation {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: 4px;
    padding: 2em;
    margin: 3em 0;
    font-family: var(--font-mono);
    font-size: 0.85em;
}

.citation h3 {
    font-family: var(--font-sans);
    margin-top: 0;
    font-size: 18px;
    margin-bottom: 1em;
    font-weight: 600;
}

.citation pre {
    margin: 1em 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    font-size: 0.9em;
}

/* === BACK TO TOP === */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    background: var(--accent-color);
    color: white;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 24px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}

.back-to-top:hover {
    background: var(--link-hover);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    body {
        font-size: 16px;
    }

    .hero {
        padding: 40px 0 30px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    h2 {
        font-size: 22px;
        margin-top: 2em;
    }

    h3 {
        font-size: 19px;
    }

    h4 {
        font-size: 17px;
    }

    .container {
        padding: 0 20px;
    }

    main {
        padding: 40px 0;
    }

    pre {
        padding: 1em;
        font-size: 0.75em;
    }

    .comparison {
        grid-template-columns: 1fr;
        gap: 1.5em;
    }

    .toc {
        padding: 1.25em 1.5em;
    }

    table {
        font-size: 0.8em;
    }

    th, td {
        padding: 0.5em 0.75em;
    }
}

/* === MAIN NAVIGATION === */
.main-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
}

.nav-tabs {
    display: flex;
    justify-content: center;
    gap: 0;
    max-width: var(--content-width);
    margin: 0 auto;
}

.nav-tab {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    padding: 1rem 2rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
    margin-bottom: -1px;
}

.nav-tab:hover {
    color: var(--text-primary);
}

.nav-tab.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

.view-content {
    display: none;
}

.view-content.active {
    display: block;
}

/* === GALLERY VIEW (FULL WIDTH) === */
.gallery-view {
    min-height: 100vh;
    background: var(--bg-primary);
    padding: 2rem 0;
}

.gallery-header {
    text-align: center;
    padding: 1rem 2rem 2rem;
}

.gallery-header h1 {
    font-family: var(--font-serif);
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.gallery-header p {
    font-family: var(--font-sans);
    font-size: 15px;
    color: var(--text-muted);
    margin: 0;
}

.gallery-tabs {
    display: flex;
    justify-content: center;
    gap: 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.gallery-tab {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    padding: 0.75rem 2rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
    margin-bottom: -1px;
}

.gallery-tab:hover {
    color: var(--text-primary);
}

.gallery-tab.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

.gallery-container {
    position: relative;
}

.gallery-content {
    display: none;
}

.gallery-content.active {
    display: block;
}

.gallery-carousel {
    position: relative;
    display: inline-block;
    max-width: 100%;
}

.gallery-track {
    flex: 1;
    overflow: hidden;
}

.gallery-slide {
    display: none;
    width: 100%;
    text-align: center;
}

.gallery-slide.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.gallery-slide object {
    width: auto;
    height: auto;
    min-height: 750px;
    max-height: calc(100vh - 100px);
    max-width: 100%;
    display: block;
}

/* Desktop/Mobile SVG switching */
.gallery-slide .svg-desktop {
    display: block;
}

.gallery-slide .svg-mobile {
    display: none;
}

.carousel-wrapper {
    display: flex;
    justify-content: center;
    width: 100%;
    padding: 0 80px;
    box-sizing: border-box;
}

.carousel-nav {
    position: absolute;
    top: 38%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.2s;
    z-index: 10;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.carousel-nav.prev {
    left: -64px;
}

.carousel-nav.next {
    right: -64px;
}

.carousel-nav:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background: var(--bg-secondary);
}

.carousel-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
}

.gallery-caption {
    margin: 0;
    font-size: 1rem;
    color: var(--text-secondary);
    font-family: var(--font-sans);
}

.gallery-caption strong {
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.gallery-caption a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s;
}

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

.slide-share {
    display: flex;
    gap: 8px;
}

.gallery-share-mobile {
    display: none;
}

.gallery-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 1.5rem;
}

.gallery-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border-color);
    border: none;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.gallery-dot:hover {
    background: var(--text-muted);
}

.gallery-dot.active {
    background: var(--accent-color);
    transform: scale(1.2);
}

@media (max-width: 768px) {
    .nav-tab {
        padding: 0.75rem 1.5rem;
        font-size: 13px;
    }

    .gallery-view {
        padding: 1rem 0;
    }

    .gallery-header {
        padding: 0.5rem 1rem 1rem;
    }

    .gallery-header h1 {
        font-size: 20px;
    }

    .gallery-tab {
        padding: 0.5rem 0.75rem;
        font-size: 12px;
    }

    .gallery-tabs {
        margin-bottom: 1rem;
    }

    .carousel-nav {
        width: 32px;
        height: 32px;
        font-size: 1rem;
        top: 35%;
        background: rgba(255,255,255,0.9);
    }
    
    .carousel-nav.prev {
        left: 4px;
    }
    
    .carousel-nav.next {
        right: 4px;
    }

    .carousel-wrapper {
        padding: 0 16px;
    }

    .carousel-info {
        flex-direction: column;
        gap: 0.5rem;
        padding: 0.5rem 1rem;
        margin-bottom: 0.75rem;
    }

    .gallery-caption {
        text-align: center;
        font-size: 0.9rem;
        line-height: 1.4;
    }

    /* Hide desktop share, show mobile share */
    .slide-share.desktop-only {
        display: none;
    }

    .gallery-share-mobile {
        display: flex;
        justify-content: center;
        gap: 12px;
        margin-top: 0.5rem;
        padding: 0.75rem;
    }

    .gallery-share-mobile .share-btn {
        width: 44px;
        height: 44px;
    }

    .gallery-slide object {
        width: 100%;
        min-height: auto;
        max-height: none;
    }

    /* Swap to mobile SVGs on small screens */
    .gallery-slide .svg-desktop {
        display: none;
    }

    .gallery-slide .svg-mobile {
        display: block;
    }
}

/* === SHARE BUTTONS === */
.share-buttons {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 1rem;
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
}

.share-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background: var(--bg-secondary);
}

.share-btn.copied {
    border-color: #22c55e;
    color: #22c55e;
}

.slide-share .share-btn {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-muted);
}

/* Very small screens */
@media (max-width: 400px) {
    .carousel-nav {
        width: 28px;
        height: 28px;
        font-size: 0.9rem;
        top: 35%;
    }
    
    .carousel-nav.prev {
        left: 2px;
    }
    
    .carousel-nav.next {
        right: 2px;
    }

    .carousel-wrapper {
        padding: 0 12px;
    }
    
    .gallery-caption {
        font-size: 0.8rem;
    }
}

/* === ALGORITHM BOXES === */
.algorithm-box {
    background: var(--bg-code);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-color);
    padding: 1.5rem;
    margin: 1.5rem 0;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
}

.algorithm-header {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.algorithm-body {
    font-family: var(--font-mono);
}

.algo-line {
    margin: 0.25rem 0;
}

.algo-indent-1 {
    padding-left: 2rem;
}

.algo-indent-2 {
    padding-left: 4rem;
}

.algo-indent-3 {
    padding-left: 6rem;
}

.algorithm-body .keyword {
    color: #0066cc;
}

.algorithm-body .comment {
    color: #666666;
    font-style: italic;
}

/* === RESPONSIVE IMAGE CLASSES === */
.hide-on-mobile, .svg-desktop {
    display: block;
}

.show-on-mobile, .svg-mobile {
    display: none;
}

@media (max-width: 768px) {
    .hide-on-mobile, .svg-desktop {
        display: none;
    }
    
    .show-on-mobile, .svg-mobile {
        display: block;
    }
}

/* === INLINE TOWER FIGURE === */
.inline-tower-figure {
    display: flex;
    justify-content: center;
    margin: 0.5rem 0;
    line-height: 0;
}

.inline-tower-figure object {
    max-width: 100%;
    width: auto;
    height: auto;
    max-height: 70vh;
}

/* === PRINT STYLES === */
@media print {
    .back-to-top {
        display: none;
    }

    .hero {
        background: white;
        border-bottom: 2px solid black;
    }

    a {
        color: black;
        text-decoration: underline;
    }

    .showcase-tabs,
    .carousel-btn,
    .carousel-dots {
        display: none;
    }
}