:root {
    --bg: #ffffff;
    --fg: #1a1a1a;
    --muted: #888888;
    --link: #2a4d8f;
    --link-hover: #1a3a7a;
    --border: #e5e5e5;
    --code-bg: #f5f5f5;
    --quote-border: #cccccc;
    --max-width: 760px;
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

[data-theme="dark"] {
    --bg: #1a1a1a;
    --fg: #e5e5e5;
    --muted: #999999;
    --link: #8ab4f8;
    --link-hover: #aac8fa;
    --border: #333333;
    --code-bg: #2a2a2a;
    --quote-border: #444444;
}

* {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.6;
    transition: background 0.2s ease, color 0.2s ease;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

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

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

/* HOME */

.home {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 4rem;
    padding-bottom: 4rem;
}

.intro h1 {
    margin: 0;
    font-size: 1.7rem;
    font-weight: 600;
}

.intro .tagline {
    margin: 0.25rem 0 2rem;
    color: var(--muted);
    font-size: 1rem;
}

.nav-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    margin-bottom: 2rem;
}

.nav-links a {
    color: var(--fg);
    margin-right: 1.25rem;
    font-size: 1rem;
}

.nav-links a.active {
    text-decoration: underline;
    text-underline-offset: 4px;
}

.icons {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.icons a, .icons button, .header-icons a, .header-icons button {
    color: var(--fg);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    display: inline-flex;
    align-items: center;
}

.icons a:hover, .icons button:hover, .header-icons a:hover, .header-icons button:hover {
    color: var(--link);
}

.theme-toggle .icon-sun {
    display: none;
}

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

[data-theme="dark"] .theme-toggle .icon-sun {
    display: inline-block;
}

/* PAGE HEADER */

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.75rem;
    margin-bottom: 2rem;
}

.page-header h2 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 500;
}

.page-header h2 a {
    color: var(--fg);
}

.header-icons {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

/* POST LIST */

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

.post-list li {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 0.5rem 0;
    gap: 1rem;
}

.post-list .date {
    color: var(--muted);
    font-variant-numeric: tabular-nums;
    font-size: 0.95rem;
}

.more-link {
    text-align: right;
    margin-top: 1rem;
}

/* ABOUT */

.about p {
    margin: 0 0 1rem;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1.5rem;
    align-items: start;
    margin: 1.5rem 0;
}

.profile-photo {
    max-width: 220px;
    width: 100%;
    height: auto;
    border-radius: 4px;
}

.contact-box {
    border-left: 3px solid var(--quote-border);
    padding: 0.75rem 1rem;
    margin-top: 2rem;
}

.contact-box code {
    background: var(--code-bg);
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    font-size: 0.9em;
}

/* CV */

.cv-section {
    margin-top: 2.5rem;
}

.cv-section h3 {
    margin: 0 0 0.75rem;
    font-size: 1.05rem;
    font-weight: 600;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.3rem;
}

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

.cv-list > li {
    padding: 0.5rem 0;
}

.cv-entry {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
}

.cv-entry > div:first-child {
    flex: 1;
}

.cv-detail {
    color: var(--muted);
    font-size: 0.92rem;
    margin-top: 0.15rem;
}

.cv-date {
    color: var(--muted);
    font-variant-numeric: tabular-nums;
    font-size: 0.92rem;
    white-space: nowrap;
}

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

.cv-skills li {
    padding: 0.25rem 0;
}

@media (max-width: 600px) {
    .cv-entry {
        flex-direction: column;
        gap: 0.15rem;
    }
}

/* PUBLICATIONS */

.publication {
    margin-bottom: 3rem;
}

.publication h3 {
    margin: 0 0 0.4rem;
    font-size: 1.1rem;
    font-weight: 500;
}

.publication h3 .year {
    color: var(--muted);
    font-weight: 400;
}

.authors {
    margin: 0 0 0.5rem;
    font-size: 0.95rem;
}

.pub-meta {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.tags .tag {
    color: var(--muted);
    margin-right: 0.5rem;
}

.tags .tag:hover {
    color: var(--link);
}

.links a {
    margin-left: 0.5rem;
}

.venue {
    margin: 0 0 0.75rem;
    font-size: 0.95rem;
}

.pub-body {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1.5rem;
    align-items: start;
}

.pub-body p {
    margin: 0;
}

.pub-figure {
    max-width: 280px;
    width: 100%;
    height: auto;
    border-radius: 4px;
}

/* POST */

.post h1 {
    margin: 0 0 0.25rem;
    font-size: 1.6rem;
    font-weight: 600;
}

.post .post-date {
    color: var(--muted);
    margin: 0 0 2rem;
    font-size: 0.95rem;
}

.post h2 {
    margin-top: 2rem;
    font-size: 1.25rem;
}

.post p {
    margin: 0 0 1rem;
}

.post code {
    background: var(--code-bg);
    padding: 0.15rem 0.4rem;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.9em;
}

.post pre {
    background: var(--code-bg);
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    font-size: 0.9em;
}

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

.post blockquote {
    border-left: 3px solid var(--quote-border);
    margin: 1rem 0;
    padding: 0.25rem 1rem;
    color: var(--muted);
}

.post .lede {
    font-size: 1.25rem;
    line-height: 1.5;
    font-style: italic;
    margin: 0 0 1.5rem;
}

.post-figure {
    margin: 2rem 0;
}

.post-figure img {
    width: 100%;
    height: auto;
    border-radius: 4px;
    display: block;
}

.post-figure figcaption {
    font-size: 0.9rem;
    color: var(--muted);
    text-align: center;
    margin-top: 0.5rem;
}

.post .callout {
    border-left: 3px solid var(--link);
    background: var(--code-bg);
    padding: 0.75rem 1rem;
    margin: 1.5rem 0;
    font-style: italic;
}

/* POST IDEAS */

.post-ideas .lede {
    font-size: 1.05rem;
    color: var(--muted);
    margin: 0 0 2.5rem;
    font-style: italic;
}

.idea {
    margin: 0 0 2.5rem;
    padding: 1.25rem 1.5rem;
    border: 1px solid var(--border);
    border-radius: 6px;
}

.idea h3 {
    margin: 0 0 0.75rem;
    font-size: 1.05rem;
    font-weight: 600;
    display: flex;
    align-items: baseline;
    gap: 0.6rem;
}

.idea-num {
    color: var(--muted);
    font-variant-numeric: tabular-nums;
    font-weight: 400;
    font-size: 0.85rem;
}

.idea-meta {
    margin-bottom: 0.75rem;
    font-size: 0.85rem;
}

.idea-tag {
    color: var(--muted);
    margin-right: 0.6rem;
}

.idea p {
    margin: 0 0 0.75rem;
}

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

.idea-refs {
    color: var(--muted);
    font-size: 0.9rem;
}

/* READING PROGRESS BAR */

.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: transparent;
    z-index: 100;
    pointer-events: none;
}

.reading-progress-bar {
    height: 100%;
    width: 0%;
    background: #ec4899;
    will-change: width;
}

/* TABLE OF CONTENTS (post sidebar) */

.post-toc {
    display: none;
}

@media (min-width: 1100px) {
    .post-layout {
        display: grid;
        grid-template-columns: 220px 760px;
        gap: 2rem;
        justify-content: center;
        align-items: start;
    }

    .post-layout .container {
        max-width: 760px;
        margin: 0;
    }

    .post-toc {
        display: block;
        position: sticky;
        top: 2rem;
        align-self: start;
        padding-top: 4rem;
        max-height: calc(100vh - 2rem);
        overflow-y: auto;
    }

    .post-toc-title {
        font-size: 0.78rem;
        text-transform: uppercase;
        letter-spacing: 0.08em;
        color: var(--muted);
        margin: 0 0 0.6rem 0.85rem;
        font-weight: 500;
    }

    .post-toc ul {
        list-style: none;
        padding: 0;
        margin: 0;
        border-left: 1px solid var(--border);
    }

    .post-toc li {
        margin: 0;
    }

    .post-toc a {
        display: block;
        padding: 0.4rem 0 0.4rem 0.85rem;
        color: var(--muted);
        font-size: 0.88rem;
        line-height: 1.4;
        border-left: 2px solid transparent;
        margin-left: -1px;
        text-decoration: none;
        transition: color 0.15s ease, border-color 0.15s ease;
    }

    .post-toc a:hover {
        color: var(--fg);
        text-decoration: none;
    }

    .post-toc a.active {
        color: var(--fg);
        font-weight: 600;
        border-left-color: var(--link);
    }
}

/* RESPONSIVE */

@media (max-width: 600px) {
    .container {
        padding: 1.5rem 1rem;
    }

    .about-grid, .pub-body {
        grid-template-columns: 1fr;
    }

    .profile-photo, .pub-figure {
        max-width: 100%;
    }

    .pub-meta {
        flex-direction: column;
        align-items: flex-start;
    }

    .links a {
        margin-left: 0;
        margin-right: 0.5rem;
    }
}