/* ==========================================================
   Portfolio – clean, single-column layout
   Inspired by jonbarron.info
   ========================================================== */

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: #fff;
    color: #222;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
                 Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

/* ---------- Top nav (sticky) ---------- */
.topnav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(10px);
    -webkit-backdrop-filter: saturate(180%) blur(10px);
    border-bottom: 1px solid #eee;
}

.topnav-inner {
    max-width: 900px;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.topnav .brand {
    font-weight: 600;
    color: #222;
    font-size: 15px;
    letter-spacing: -0.01em;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.topnav .brand-logo {
    width: 22px;
    height: 22px;
    object-fit: contain;
}
.topnav .brand:hover { text-decoration: none; color: #1772d0; }

.topnav-links {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.topnav-links a {
    padding: 6px 12px;
    font-size: 14px;
    color: #555;
    border-radius: 6px;
    font-weight: 500;
}
.topnav-links a:hover {
    background: #f3f3f3;
    color: #111;
    text-decoration: none;
}
.topnav-links a.active {
    background: #1772d0;
    color: #fff;
}
.topnav-links a.active:hover { background: #135ea8; color: #fff; }

a {
    color: #1772d0;
    text-decoration: none;
}
a:hover { text-decoration: underline; }

em { font-style: italic; }

.page {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

/* ---------- Intro / header ---------- */
.intro {
    display: flex;
    align-items: flex-start;
    gap: 28px;
    margin-bottom: 48px;
}

.intro .profile {
    width: 180px;
    height: 180px;
    object-fit: cover;
    border-radius: 50%;
    flex-shrink: 0;
    background: #f3f3f3;
    border: 1px solid #eee;
}

.intro .bio { flex: 1; min-width: 0; }

.intro h1 {
    font-size: 26px;
    margin: 0 0 12px 0;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.intro p {
    margin: 0 0 14px 0;
}

.intro .links {
    margin-top: 18px;
    font-size: 15px;
    color: #555;
}
.intro .links a { font-weight: 500; }

/* ---------- Sections ---------- */
section {
    margin-top: 40px;
    border-top: 1px solid #eee;
    padding-top: 24px;
}

section h2 {
    font-size: 20px;
    font-weight: 600;
    margin: 0 0 18px 0;
    letter-spacing: -0.01em;
}

.skills-line {
    font-size: 14px;
    line-height: 1.6;
    color: #444;
    margin: 0 0 8px 0;
}
.skills-line strong { color: #1a2540; }

/* ---------- News ---------- */
ul.news {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 220px;
    overflow-y: auto;
    border: 1px solid #eee;
    border-radius: 6px;
    padding: 10px 14px;
    background: #fafafa;
}

ul.news li {
    padding: 6px 0;
    border-bottom: 1px dashed #eee;
    font-size: 15px;
}
ul.news li:last-child { border-bottom: none; }

ul.news .date {
    display: inline-block;
    width: 60px;
    color: #888;
    font-variant-numeric: tabular-nums;
    font-weight: 500;
}

/* ---------- Projects ---------- */
.project {
    display: flex;
    gap: 22px;
    align-items: flex-start;
    margin-bottom: 28px;
}

.project-img {
    width: 180px;
    flex-shrink: 0;
}

.project-img img {
    width: 100%;
    height: 130px;
    object-fit: cover;
    border-radius: 6px;
    border: 1px solid #eee;
    background: #f6f6f6;
}

.project-text { flex: 1; min-width: 0; }

.project-text h3 {
    font-size: 17px;
    font-weight: 600;
    margin: 0 0 6px 0;
}

.project-text p {
    margin: 0;
    color: #444;
    font-size: 15px;
}

/* AprilTag thumbnail – real SVG */
.apriltag-thumb {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f6f6f6;
    border: 1px solid #eee;
    border-radius: 6px;
    height: 130px;
    padding: 14px;
    box-sizing: border-box;
}
.apriltag-thumb a { display: block; height: 100%; }
.apriltag-thumb img {
    height: 100%;
    width: auto;
    object-fit: contain;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
}

/* ---------- Publications ---------- */
.pub-meta {
    font-size: 14px;
    color: #777;
    margin: -8px 0 16px 0;
}

.pub {
    margin-bottom: 18px;
    padding-bottom: 14px;
    border-bottom: 1px dashed #eee;
}
.pub:last-child { border-bottom: none; }

.pub-title {
    font-weight: 600;
    margin: 0 0 4px 0;
    color: #111;
    font-size: 15px;
}
.pub-authors {
    margin: 0 0 2px 0;
    font-size: 14px;
    color: #444;
}
.pub-venue {
    margin: 0;
    font-size: 14px;
    color: #777;
    font-style: italic;
}

/* ---------- Experience timeline ---------- */
ul.timeline {
    list-style: none;
    padding: 0;
    margin: 0;
}
ul.timeline li {
    display: flex;
    gap: 16px;
    padding: 8px 0;
    border-bottom: 1px dashed #eee;
    font-size: 15px;
}
ul.timeline li:last-child { border-bottom: none; }
ul.timeline .when {
    width: 130px;
    flex-shrink: 0;
    color: #888;
    font-variant-numeric: tabular-nums;
    font-weight: 500;
}
ul.timeline .what { flex: 1; color: #333; }

/* ---------- Footer ---------- */
footer {
    margin-top: 60px;
    padding-top: 20px;
    border-top: 1px solid #eee;
    text-align: center;
    font-size: 13px;
    color: #888;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
    .topnav-inner {
        padding: 10px 16px;
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .topnav-links { width: 100%; gap: 2px; }
    .topnav-links a { padding: 5px 9px; font-size: 13px; }

    .intro {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 16px;
    }
    .intro .profile { width: 140px; height: 140px; }
    .intro .links { text-align: center; }

    .project { flex-direction: column; }
    .project-img { width: 100%; }
    .project-img img { height: 180px; }
    .apriltag-thumb { height: 180px; }

    ul.timeline li { flex-direction: column; gap: 2px; }
    ul.timeline .when { width: auto; }
    ul.news .date { width: 56px; }
}