/* GitHub-profile-style layout, Primer-like tokens. */

:root {
  --bg:            #ffffff;
  --bg-subtle:     #f6f8fa;
  --fg:            #1f2328;
  --muted:         #59636e;
  --border:        #d1d9e0;
  --border-muted:  #e4e9ee;
  --link:          #0969da;
  --tab-active:    #fd8c73;
  --topic-bg:      #ddf4ff;
  --topic-fg:      #0969da;
  --btn-bg:        #f6f8fa;
  --btn-hover:     #eff2f5;
  --green:         #1a7f37;
  --green-border:  #4ac26b;

  --font: Arial, Helvetica, sans-serif;
  --mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

  --side-w: 220px;
  --gap: 56px;          /* space between sidebar and main column */
  --tab-h: 54px;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--tab-h) + 16px); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 14px/1.5 var(--font);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--link); outline-offset: -1px; border-radius: 6px; }
ol, ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p { margin: 0; }

.muted { color: var(--muted); }
.small { font-size: 12px; }

.octicon { width: 16px; height: 16px; flex: none; vertical-align: text-bottom; fill: none; stroke: currentColor; stroke-width: 1.3; stroke-linecap: round; stroke-linejoin: round; }
.octicon.is-fill { fill: currentColor; stroke: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }

/* ───────── Tab bar ───────── */
.tabbar {
  position: sticky;
  top: 0;
  z-index: 10;
  margin-top: 24px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.tabbar-inner { display: flex; gap: var(--gap); }

/* Mini avatar + name; fades in once the sidebar name scrolls away (like GitHub). */
.tabbar-brand {
  width: var(--side-w);
  flex: none;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--fg);
  font-weight: 600;
  opacity: 0;
  visibility: hidden;
  transition: opacity .15s;
}
.tabbar-brand:hover { text-decoration: none; }
.tabbar.stuck .tabbar-brand { opacity: 1; visibility: visible; }
.mini-avatar {
  position: relative;
  width: 32px;
  height: 32px;
  flex: none;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  overflow: hidden;
  display: grid;
  place-items: center;
  color: #8c959f;
  font-size: 11px;
  font-weight: 500;
}
.mini-avatar img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }

.tabs { display: flex; gap: 6px; margin-left: -16px; overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 16px;
  line-height: var(--tab-h);
  color: var(--fg);
  font-size: 17px;
  font-weight: 700;
  white-space: nowrap;
}
.tab:hover { text-decoration: none; }
.tab:hover::before {
  content: '';
  position: absolute;
  inset: 6px 0;
  border-radius: 6px;
  background: var(--btn-hover);
  z-index: -1;
}
.tab[aria-selected="true"]::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  border-radius: 6px;
  background: var(--tab-active);
  animation: tab-underline .22s ease-out;
}
@keyframes tab-underline { from { transform: scaleX(0.3); opacity: 0; } to { transform: scaleX(1); opacity: 1; } }

/* ───────── Layout ───────── */
.layout {
  display: flex;
  gap: var(--gap);
  align-items: flex-start;
  padding-top: 24px;
  padding-bottom: 48px;
}
.profile { width: var(--side-w); flex: none; }
main { flex: 1; min-width: 0; }
.panel[hidden] { display: none; }
.panel.is-entering { animation: panel-in .24s ease-out; }
@keyframes panel-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  .panel.is-entering,
  .tab[aria-selected="true"]::after { animation: none; }
}

/* ───────── Profile sidebar ───────── */
.avatar {
  position: relative;
  width: 180px;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  overflow: hidden;
  display: grid;
  place-items: center;
}
.avatar img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.avatar-fallback { font-size: 56px; font-weight: 300; color: #8c959f; letter-spacing: -0.02em; }
.avatar.has-img .avatar-fallback,
.mini-avatar.has-img { color: transparent; }

.profile-head > div:last-child { padding: 16px 0 14px; }
.profile-name { font-size: 20px; font-weight: 600; line-height: 1.25; }
.profile-affil { margin-top: 6px; color: var(--muted); font-size: 14px; line-height: 1.5; }
.profile-affil li:first-child { color: var(--fg); }

.vcard { padding-top: 14px; border-top: 1px solid var(--border-muted); font-size: 13.5px; }
.vcard li { display: flex; align-items: center; gap: 8px; margin: 0 -6px; padding: 3px 6px; min-width: 0; border-radius: 6px; }

/* One-off highlight when "reach out" is clicked: two soft pulses, then gone. */
@keyframes vcard-flash {
  0%, 100% { background: transparent; box-shadow: 0 0 0 0 rgba(9, 105, 218, 0); }
  20%, 60% { background: var(--topic-bg); box-shadow: 0 0 0 2px rgba(9, 105, 218, 0.45); }
  40%      { background: var(--topic-bg); box-shadow: 0 0 0 5px rgba(9, 105, 218, 0.12); }
}
.vcard li.is-flash { animation: vcard-flash 2.2s ease-in-out 1; }
.vcard li.is-flash a { color: var(--link); }
@media (prefers-reduced-motion: reduce) {
  @keyframes vcard-flash-calm { 0%, 70% { background: var(--topic-bg); } 100% { background: transparent; } }
  .vcard li.is-flash { animation: vcard-flash-calm 2s linear 1; }
}
.vcard li > :last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.vcard .octicon { color: var(--muted); }
.vcard a { color: var(--fg); }
.vcard a:hover { color: var(--link); }

/* ───────── Boxes ───────── */
.box { border: 1px solid var(--border); border-radius: 6px; }
.box + .box { margin-top: 24px; }
.box-header {
  padding: 12px 16px;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
  border-radius: 6px 6px 0 0;
}
.box-header h2 { font-size: 14px; font-weight: 600; }

/* README */
.readme { padding: 24px; }
.markdown { font-size: 16px; line-height: 1.6; }
.markdown p + p { margin-top: 12px; }
.markdown strong { font-weight: 600; }

/* Sections inside About */
.block { margin-top: 32px; }
.block-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 8px; }
.block-head h2 { font-size: 16px; font-weight: 400; }
.block-link { font-size: 12px; }

/* ───────── Selected publications (pinned cards) ───────── */
.pinned { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.card {
  display: flex;
  flex-direction: column;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
}
.card-head { display: flex; align-items: flex-start; gap: 10px; }
.card-title { font-size: 14px; font-weight: 600; line-height: 1.4; }
.card-head .label { margin-top: 1px; }
.card-desc { flex: 1; margin-top: 8px; font-size: 12.5px; color: var(--muted); }
.card .pub-topics { flex-basis: 100%; margin: 4px 0 0; }
/* While a card shows its abstract/BibTeX, don't stretch its row neighbour to match. */
.pinned:has(.pub-panel:not([hidden])) { align-items: start; }

.label {
  padding: 0 7px;
  border: 1px solid var(--border);
  border-radius: 2em;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  line-height: 18px;
  white-space: nowrap;
}
.card-head .label { margin-left: auto; }
.label.is-pub { border-color: var(--green-border); color: var(--green); }

.dot { display: inline-flex; align-items: center; gap: 4px; }
.dot::before {
  content: '';
  width: 12px; height: 12px;
  border-radius: 50%;
  border: 1px solid rgba(31, 35, 40, 0.1);
  background: var(--c, #8c959f);
}

/* ───────── News timeline ───────── */
.timeline { position: relative; margin-left: 16px; padding: 4px 0; }
.timeline::before {
  content: '';
  position: absolute;
  top: 0; bottom: 0; left: 0;
  width: 2px;
  background: var(--border-muted);
}
.timeline li { position: relative; display: flex; gap: 16px; padding: 8px 0 8px 24px; font-size: 15px; line-height: 1.55; }
.timeline li::before {
  content: '';
  position: absolute;
  left: -4px; top: 15px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--border);
}
.timeline li.is-latest::before { border-color: var(--tab-active); }
.timeline time { width: 70px; flex: none; color: var(--muted); font-size: 13px; line-height: 23px; white-space: nowrap; }
.timeline b { font-weight: 600; }

/* ───────── News tab ───────── */
.news-year + .news-year { margin-top: 24px; }
.news-year h2 { margin-bottom: 4px; font-size: 16px; font-weight: 600; }
.news-paper { font-weight: 600; }
.timeline.is-compact time { width: 36px; }

/* ───────── Publications tab ───────── */
.toolbar { display: flex; gap: 8px; padding-bottom: 16px; border-bottom: 1px solid var(--border-muted); }
.input, .select {
  height: 32px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
  font: 14px var(--font);
}
.input { flex: 1; min-width: 0; padding: 0 12px; }
.input:focus, .select:focus { outline: none; border-color: var(--link); box-shadow: inset 0 0 0 1px var(--link); }
.select {
  padding: 0 28px 0 12px;
  background: var(--btn-bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4.5 6.5 8 10l3.5-3.5' fill='none' stroke='%2359636e' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat right 8px center / 16px;
  font-weight: 500;
  cursor: pointer;
  appearance: none;
}

.result-count { padding: 12px 0; color: var(--muted); border-bottom: 1px solid var(--border-muted); }
.result-count:empty { display: none; }

.pub { padding: 20px 0; border-bottom: 1px solid var(--border-muted); }
.pub-head { display: flex; align-items: flex-start; gap: 8px; }
.pub-title { font-size: 16px; font-weight: 600; line-height: 1.4; }
.pub-head .label { margin-top: 2px; margin-left: auto; }
.pub-authors { margin-top: 4px; color: var(--muted); }
.me { color: var(--fg); font-weight: 600; }
.pub-venue { margin-top: 2px; color: var(--muted); font-size: 13px; font-style: italic; }
.pub-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-top: 10px; font-size: 12px; color: var(--muted); }
.pub-foot:empty { display: none; }
.pub-topics { display: inline-flex; flex-wrap: wrap; gap: 4px 14px; margin-left: 6px; }
.pub-topics:first-child { margin-left: 0; }
.btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--btn-bg);
  color: var(--fg);
  font: 500 12px/24px var(--font);
  cursor: pointer;
}
.btn-sm:hover { background: var(--btn-hover); text-decoration: none; }
.btn-sm .octicon { width: 14px; height: 14px; color: var(--muted); }
.btn-sm[aria-expanded="true"] { background: var(--btn-hover); border-color: #afb8c1; box-shadow: inset 0 1px 0 rgba(31, 35, 40, 0.04); }

.pub-panel {
  position: relative;
  margin-top: 10px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-subtle);
  font-size: 13.5px;
  line-height: 1.6;
}
.pub-panel[hidden] { display: none; }
.pub-bib pre {
  margin: 0;
  overflow-x: auto;
  font: 12px/1.55 var(--mono);
  white-space: pre;
}
.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 0 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
  font: 500 12px/22px var(--font);
  cursor: pointer;
}
.copy-btn:hover { background: var(--btn-hover); }
.publist .empty { padding: 32px 0; text-align: center; color: var(--muted); }
.scholar-note { margin-top: 16px; }

/* ───────── Experience / Service rows ───────── */
.rows > li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
}
.rows > li + li { border-top: 1px solid var(--border-muted); }
.row-icon {
  width: 32px;
  height: 32px;
  flex: none;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-subtle);
  color: var(--muted);
}
.row-body { flex: 1; min-width: 0; }
.row-title { font-weight: 600; }
.row-sub { color: var(--muted); }
.row-note { margin-top: 2px; color: var(--muted); font-size: 13px; }
.row-meta { flex: none; display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 4px; padding-top: 1px; color: var(--muted); font-size: 12px; white-space: nowrap; }

/* Year-grouped lists (Awards, Service) */
.yrow {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: baseline;
  padding: 9px 16px;
}
.yrow + .yrow { border-top: 1px solid var(--border-muted); }
.yrow.is-first + .yrow:not(.is-first),
.yrow:not(.is-first) + .yrow:not(.is-first) { border-top-color: transparent; }
.yrow-year { color: var(--muted); font-size: 13px; font-weight: 600; font-variant-numeric: tabular-nums; }
.yrow-body { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.yrow-body .row-sub { margin-left: 10px; font-size: 13px; }
.yrow-meta { color: var(--muted); font-size: 12px; white-space: nowrap; }

/* ───────── Footer ───────── */
.footer { border-top: 1px solid var(--border-muted); }
.footer .container { padding-top: 24px; padding-bottom: 40px; font-size: 12px; color: var(--muted); }

/* ───────── Responsive ───────── */
@media (max-width: 1012px) {
  :root { --side-w: 200px; --gap: 40px; }
  .avatar { width: 160px; }
  .avatar-fallback { font-size: 50px; }
}

@media (max-width: 767px) {
  .container { padding: 0 16px; }
  .tabbar { margin-top: 0; }
  .tabbar-brand { display: none; }
  .tabs { gap: 0; margin: 0 -8px; }
  .tab { padding: 0 8px; font-size: 15px; }
  .layout { flex-direction: column; gap: 0; padding-top: 16px; }
  .profile { width: 100%; padding-bottom: 4px; }
  .profile-head { display: flex; align-items: center; gap: 16px; }
  .avatar { width: 72px; flex: none; }
  .profile-affil { margin-top: 2px; font-size: 13.5px; line-height: 1.4; }
  .vcard { margin-top: 14px; }
  .avatar-fallback { font-size: 26px; }
  .profile-head > div:last-child { padding: 0; }
  .profile-name { font-size: 22px; }
  .vcard li { padding: 4px 0; }
  main { width: 100%; padding-top: 16px; border-top: 1px solid var(--border-muted); }
  .readme { padding: 16px; }
  .pinned { grid-template-columns: minmax(0, 1fr); }
  .toolbar { flex-wrap: wrap; }
  .input { flex-basis: 100%; }
  .select { flex: 1; min-width: 0; padding-left: 8px; font-size: 13px; }
  .rows > li { flex-wrap: wrap; }
  .row-meta { width: 100%; justify-content: flex-start; padding-left: 44px; }
  .yrow { grid-template-columns: 40px minmax(0, 1fr); gap: 4px 12px; }
  .yrow-body { white-space: normal; }
  .yrow-body .row-sub { display: block; margin-left: 0; }
  .yrow-meta { grid-column: 2; }
}