/* ── Reset & Base ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --text: #333;
    --text-light: #555;
    --accent: #2c5282;
    --accent-hover: #1a365d;
    --bg: #fff;
    --bg-alt: #f7f7f8;
    --border: #e2e2e2;
    --max-width: 780px;
    --font: "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
    --font-mono: "SF Mono", "Fira Code", monospace;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    font-size: 16px;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}
a:hover { color: var(--accent-hover); text-decoration: underline; }

/* ── Navigation ── */
header {
    position: sticky;
    top: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0.8rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-name {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text);
}
.nav-name:hover { text-decoration: none; color: var(--accent); }

.nav-links a {
    margin-left: 1.5rem;
    font-size: 0.95rem;
    color: var(--text-light);
}
.nav-links a:hover { color: var(--accent); text-decoration: none; }

/* ── Main ── */
main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1.5rem 3rem;
}

hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2.5rem 0;
}

/* ── About Section ── */
.about-section { padding-top: 0.5rem; }

.about-content {
    display: flex;
    gap: 2.5rem;
    align-items: flex-start;
}

.about-text { flex: 1; }

.about-text h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
    color: var(--text);
}

.tagline {
    font-size: 1.05rem;
    color: var(--text-light);
    font-style: italic;
    margin-bottom: 1rem;
}

.about-text p { margin-bottom: 0.8rem; }

.inside-joke {
    font-size: 0.82rem;
    color: #999;
    font-style: italic;
}

.about-photo {
    flex-shrink: 0;
}

.about-photo img {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--border);
}

.social-icons {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
    align-items: center;
}

.social-icons a {
    font-size: 1.3rem;
    color: var(--text-light);
    transition: color 0.2s;
    text-decoration: none;
}
.social-icons a:hover { color: var(--accent); text-decoration: none; }

/* ── Section Headings ── */
h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
    color: var(--text);
    letter-spacing: 0.02em;
}

/* ── Papers ── */
.paper {
    margin-bottom: 1.5rem;
    padding-left: 0.5rem;
    border-left: 3px solid var(--accent);
}

.paper-title {
    font-weight: 700;
    font-size: 1.02rem;
    color: var(--text);
}

.paper-authors {
    font-size: 0.9rem;
    color: var(--text-light);
}

.paper-venue {
    font-size: 0.85rem;
    color: var(--text-light);
    font-style: italic;
}

.paper-date {
    font-size: 0.82rem;
    color: var(--text-light);
}

.badge-in-progress {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.72rem;
    font-weight: 600;
    color: #1a7f37;
    background: #dafbe1;
    border: 1px solid #82e596;
    padding: 0.15rem 0.6rem;
    border-radius: 9999px;
    margin-left: 0.5rem;
    vertical-align: middle;
    letter-spacing: 0.03em;
}

.badge-in-progress::before {
    content: '';
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #1a7f37;
    animation: blink-dot 1.4s ease-in-out infinite;
}

@keyframes blink-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.2; }
}

.paper-desc {
    font-size: 0.92rem;
    margin-top: 0.3rem;
    color: var(--text-light);
    line-height: 1.6;
}

.paper-links {
    margin-top: 0.4rem;
}

.paper-links a {
    font-size: 0.85rem;
    margin-right: 1rem;
    color: var(--accent);
}

/* ── Experience / Education entries ── */
.entry {
    margin-bottom: 1.3rem;
}

.entry-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.entry-title {
    font-weight: 700;
    font-size: 1rem;
}

.entry-date {
    font-size: 0.88rem;
    color: var(--text-light);
    white-space: nowrap;
}

.entry-org {
    font-size: 0.92rem;
    color: var(--text-light);
    margin-bottom: 0.3rem;
}

.entry ul {
    padding-left: 1.2rem;
    margin-top: 0.3rem;
}

.entry li {
    font-size: 0.92rem;
    color: var(--text-light);
    margin-bottom: 0.15rem;
}

.entry-detail {
    font-size: 0.92rem;
    color: var(--text-light);
    margin-top: 0.3rem;
}

/* ── Blog ── */
.blog-intro {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

.blog-list { display: flex; flex-direction: column; gap: 1.5rem; }

.blog-entry {
    padding-left: 0.5rem;
    border-left: 3px solid var(--accent);
}

.blog-date {
    font-size: 0.82rem;
    color: var(--text-light);
}

.blog-title {
    display: block;
    font-weight: 700;
    font-size: 1.05rem;
    margin: 0.2rem 0;
}

.blog-preview {
    font-size: 0.92rem;
    color: var(--text-light);
}

/* ── Footer ── */
footer {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1.5rem;
    text-align: center;
    font-size: 0.82rem;
    color: var(--text-light);
    border-top: 1px solid var(--border);
}

/* ── Responsive ── */
@media (max-width: 640px) {
    .about-content {
        flex-direction: column-reverse;
        align-items: center;
        text-align: center;
    }
    .about-photo img {
        width: 140px;
        height: 140px;
    }
    .social-icons { justify-content: center; }
    .entry-header { flex-direction: column; gap: 0; }
    nav { flex-direction: column; gap: 0.5rem; }
    .nav-links a { margin-left: 0.8rem; }
}