/* Homepage styles. The particle background is drawn by js/bg.js.
   Most desktop sizes are the phone sizes at 0.8x; phones (<= 600px) restore the full sizes at the end.
   Body text follows blankcheng.github.io: Inter 400, 15.5px, #333, default font smoothing. */
:root {
    --bg: #f7f7f4;
    --ink: #15171c;
    --text: #333;
    --soft: #59606b;
    --faint: #8a909a;
    --rule: #e2e2dd;
    --accent: #9b3022;
    --link: #2f3e9e;
    --mono: 'JetBrains Mono', ui-monospace, Menlo, monospace;
    --col: 880px;
    --gutter: 24px;
    --photo: 272px;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
[id] { scroll-margin-top: 16px; }

body {
    margin: 0;
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 15.5px;
    line-height: 1.65;
    overflow-x: hidden;
}

h1, h2, p, ul { margin: 0; padding: 0; }
img { max-width: 100%; }

a {
    color: var(--link);
    text-decoration: none;
    transition: color .15s;
}
a:hover {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}
::selection { background: rgba(47, 62, 158, .14); }

/* Background canvas sits behind everything */
.bg-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}
.site-header, .hero, .page-content, .site-footer {
    position: relative;
    z-index: 1;
}

.wrapper {
    max-width: calc(var(--col) + 2 * var(--gutter));
    margin: 0 auto;
    padding: 0 var(--gutter);
}

/* ---------- Nav ---------- */
.site-header .wrapper {
    display: flex;
    justify-content: flex-end;
    padding-top: 21px;
}
.site-nav .menu-icon { display: none; }
.site-nav .trigger {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 3px 18px;
}
.site-nav .page-link {
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: .1em;
    text-transform: uppercase;
    line-height: 1.5;
    color: var(--soft);
    text-decoration: none;
}
.site-nav .page-link b { font-weight: 500; }
.site-nav .page-link:hover { color: var(--ink); }

/* ---------- Intro: name + About on the left, photo + links on the right ---------- */
.hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) var(--photo);
    column-gap: 45px;
    align-items: start;
    margin-top: 58px;
}
.intro-text { min-width: 0; }
.hero-name {
    color: var(--ink);
    font-weight: 600;
    font-size: 38px;
    line-height: 1.08;
    letter-spacing: -.025em;
}
.hero-title {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--soft);
    margin-top: 11px;
}
.intro-side {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 5px;
}
.hero-avatar {
    width: var(--photo);
    height: var(--photo);
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, .08), 0 14px 32px -14px rgba(0, 0, 0, .4);
}
.social-media {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 21px;
    margin-top: 18px;
}
.icon-button {
    color: var(--faint);
    font-size: 17px;
    line-height: 1;
    text-decoration: none;
}
.icon-button:hover { color: var(--accent); text-decoration: none; }
.icon-button span { display: none; }

/* ---------- Sections ---------- */
.md-heading {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--mono);
    font-weight: 500;
    font-size: 11px;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 45px 0 16px;
}
.md-heading::before { content: "§"; }
.md-heading::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--rule);
}
.md-heading .fa { display: none; }
#bio .md-heading { margin-top: 32px; }
.bio-body p + p { margin-top: 10px; }

#news ul { list-style: none; }
li.indented {
    position: relative;
    padding-left: 74px;
    margin-bottom: 6px;
}
li.indented::before {
    content: attr(data-date);
    position: absolute;
    left: 0;
    top: 2px;
    font-family: var(--mono);
    font-size: 11px;
    font-variant-numeric: tabular-nums;
    color: var(--faint);
}
li.indented strong { font-weight: 600; }

.pub-list { margin-top: 16px; }
.pub-list p {
    margin-bottom: 16px;
    line-height: 1.55;
    padding-left: 13px;
    border-left: 2px solid var(--rule);
    transition: border-color .2s;
}
.pub-list p:hover { border-left-color: var(--accent); }
.pub-list p > strong > a {
    color: var(--ink);
    font-weight: 600;
    font-size: 17px;
    text-decoration: none;
}
.pub-list p > strong > a:hover { color: var(--link); }
.pub-list u {
    text-decoration: none;
    border-bottom: 1.5px solid currentColor;
}
.pub-authors { color: var(--soft); font-size: 14px; }
.pub-venue { color: var(--faint); font-size: 13.5px; }
.pub-venue strong {
    font-family: var(--mono);
    font-size: 12px;
    font-weight: 500;
    color: var(--accent);
}

#academicservices .label {
    display: block;
    margin-top: 8px;
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--soft);
}
#academicservices ul {
    padding-left: 16px;
    margin-top: 3px;
}
#academicservices li { margin-bottom: 2px; }
#academicservices li b { font-weight: 600; }

/* ---------- Footer ---------- */
.site-footer { padding: 45px 0 35px; }
.footer-col-wrapper {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px 16px;
    padding-top: 18px;
    border-top: 1px solid var(--rule);
    font-family: var(--mono);
    font-size: 11px;
    color: var(--soft);
}
.contact-list {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    list-style: none;
}
.footer-col-2 {
    display: flex;
    gap: 13px;
}
.site-footer .icon-button { font-size: 14px; }

/* ---------- Back to top ---------- */
.back-to-top {
    position: fixed;
    right: 14px;
    bottom: 14px;
    z-index: 2;
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px solid var(--rule);
    background: rgba(255, 255, 255, .8);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--soft);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity .3s ease, visibility .3s ease;
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

/* ---------- Single column: photo, name, links, About ---------- */
@media (max-width: 760px) {
    .hero {
        grid-template-columns: minmax(0, 1fr);
        grid-template-areas: "photo" "head" "social" "bio";
        row-gap: 16px;
        margin-top: 36px;
    }
    .intro-text, .intro-side { display: contents; }
    .hero-avatar {
        grid-area: photo;
        width: 200px;
        height: 200px;
        margin-bottom: 24px;
        border-radius: 12px;
    }
    .intro-head { grid-area: head; }
    .social-media {
        grid-area: social;
        justify-content: flex-start;
        gap: 19px;
        margin-top: 16px;
    }
    .hero .icon-button { font-size: 19px; }
    #bio { grid-area: bio; }
}

/* ---------- Phones: full-size type ---------- */
@media (max-width: 600px) {
    :root { --gutter: 16px; }
    [id] { scroll-margin-top: 20px; }
    body { font-size: 16.5px; }
    .site-header .wrapper { padding-top: 16px; }
    /* five links: spread them across the full width so they stay on one line */
    .site-nav { flex: 1; }
    .site-nav .trigger { justify-content: space-between; gap: 2px 8px; }
    .site-nav .page-link { font-size: 11px; letter-spacing: .02em; }
    .hero-name { font-size: 34px; }
    .hero-title { font-size: 14px; margin-top: 14px; }
    .md-heading { gap: 12px; font-size: 14px; margin: 56px 0 20px; }
    #bio .md-heading { margin-top: 40px; }
    .bio-body p + p { margin-top: 12px; }
    li.indented { padding-left: 0; margin-bottom: 8px; }
    li.indented::before { position: static; display: block; font-size: 14px; }
    .pub-list { margin-top: 20px; }
    .pub-list p { margin-bottom: 20px; padding-left: 16px; }
    .pub-list p > strong > a { font-size: 18px; }
    .pub-authors { font-size: 16px; }
    .pub-venue { font-size: 15.5px; }
    .pub-venue strong { font-size: 14px; }
    #academicservices .label { margin-top: 10px; font-size: 13.5px; }
    #academicservices ul { padding-left: 20px; margin-top: 4px; }
    .site-footer { padding: 56px 0 44px; }
    .footer-col-wrapper { justify-content: center; gap: 10px 20px; padding-top: 22px; font-size: 14px; }
    .contact-list { gap: 6px; }
    .footer-col-2 { gap: 16px; }
    .site-footer .icon-button { font-size: 17px; }
    .back-to-top { right: 18px; bottom: 18px; padding: 5px 12px; font-size: 12px; }
}