/* Minimal, readable defaults */
* { box-sizing: border-box; }

:root {
    --text: #222;
    --muted: #555;
    --line: #e3e3e3;
    --link: #0645ad;
    --link-visited: #4b2e83;
    --bg: #ffffff;
    --header-bg: #f9f9f9;
    --content-width: 900px;
    --text-width: 720px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --text: #e6e6e6;
        --muted: #b6b6b6;
        --line: #3a3a3a;
        --link: #8cb4ff;
        --link-visited: #c2a8ff;
        --bg: #121212;
        --header-bg: #1a1a1a;
    }
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

.wrap {
    max-width: var(--content-width);
    padding: 0 18px;
    margin: 0 auto;
}

/* Keep text blocks consistent in width and centered */
.intro-text,
.about,
.pubs,
.writing,
.post-item,
article {
    max-width: var(--text-width);
    margin-left: auto;
    margin-right: auto;
}

.site-header {
    border-bottom: 1px solid var(--line);
    padding: 14px 0;
    background: var(--header-bg);
    margin-bottom: 16px;
}

.site-header .wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.brand {
    font-weight: 700;
    letter-spacing: 0.2px;
}

.site-header nav a {
    margin-left: 14px;
    padding: 6px 0;
    border-bottom: 2px solid transparent;
}

.site-header nav a.active {
    border-bottom-color: var(--text);
    font-weight: 600;
}

main {
    padding: 44px 0 48px;
    flex: 1 0 auto;
}

.intro {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
    align-items: start;
    max-width: var(--text-width);
    margin-left: auto;
    margin-right: auto;
}

.intro h1 { margin: 0 0 6px; font-size: 2rem; }
.role { margin: 0 0 14px; color: var(--muted); }
.intro p { margin: 0 0 12px; }

.plain-list { margin: 8px 0 0 18px; }
.plain-list li { margin-bottom: 6px; }

.intro-photo img {
    width: 100%;
    max-width: 220px;
    border-radius: 6px;
    border: 1px solid var(--line);
}

.contact-block {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--line);
    font-size: 0.95rem;
}

/* About */
.about h1 { margin: 0 0 18px; font-size: 1.8rem; }

/* Publications */
.pubs h1 { margin: 0 0 18px; font-size: 1.8rem; }
.pubs h2 { margin: 24px 0 10px; font-size: 1.2rem; }

.pub-list {
    margin: 0 0 12px 0;
    padding-left: 20px;
}

.pub-list li { margin: 0 0 12px 0; }
.pub-title { font-weight: 600; }
.pub-authors { color: var(--muted); margin: 2px 0; }
.pub-venue { color: var(--muted); font-style: italic; margin: 0 0 4px; }
.pub-links a { margin-right: 10px; font-size: 0.95rem; }

/* Writing */
.writing h1 { margin: 0 0 18px; font-size: 1.8rem; }
.filters {
    margin: 0 0 12px;
    max-width: var(--text-width);
    margin-left: auto;
    margin-right: auto;
    display: block;
}
.filters > div { margin-bottom: 4px; }
#posts-root {
    max-width: var(--text-width);
    margin-left: auto;
    margin-right: auto;
}
.post-item {
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
}
.post-item h3 { margin: 0 0 6px; }
.post-meta { color: var(--muted); font-size: 0.95rem; margin-bottom: 6px; }
.post-tags a { margin-right: 8px; font-size: 0.9rem; }
.post-content {
    padding: 12px 0 24px;
    border-bottom: 1px solid var(--line);
}
.post-extra-meta {
    color: var(--muted);
    font-size: 0.9rem;
    margin: 6px 0 12px;
}
.post-back-top {
    margin: 6px 0 12px;
}
.post-markdown h1,
.post-markdown h2,
.post-markdown h3,
.post-markdown h4,
.post-markdown h5,
.post-markdown h6 {
    margin: 18px 0 8px;
}
.post-markdown p {
    margin: 0 0 12px;
}
.post-markdown pre {
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 10px 12px;
    overflow-x: auto;
}
.post-markdown code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}
.post-markdown blockquote {
    border-left: 3px solid var(--line);
    padding-left: 10px;
    margin-left: 0;
    color: var(--muted);
}

/* Small screens */
@media (max-width: 720px) {
    .intro {
        grid-template-columns: 1fr;
    }
    .intro-photo {
        display: flex;
        flex-direction: column-reverse;
        align-items: center;
        gap: 12px;
    }
    .intro-photo img {
        max-width: 180px;
    }
    .contact-block {
        width: 100%;
    }
    .site-header nav a { margin-left: 10px; }
    .site-header .wrap { flex-wrap: wrap; }
    main { padding: 24px 0 32px; }
}

@media (max-width: 400px) {
    .brand { font-size: 1.1em !important; }
    .site-header nav a { margin-left: 8px; font-size: 0.95rem; }
}