/* ============================================================
   Xingrui Wang — Academic Homepage
   main.css
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400;0,500;0,600;1,400&family=Source+Sans+3:wght@300;400;500;600&family=JetBrains+Mono:wght@400&display=swap');

/* ---- Variables ---- */
:root {
  --bg:        #fafaf8;
  --surface:   #ffffff;
  --border:    #e4e2dd;
  --text:      #1c1b19;
  --text-2:    #5a5854;
  --text-3:    #9a9793;
  --blue:      #2c5f9e;
  --blue-bg:   #f0f4fa;
  --blue-bd:   #c0d0e8;
  --gold:      #996600;
  --gold-bg:   #fdf8ee;
  --gold-bd:   #e8d090;
  --green:     #2d6a4f;
  --green-bg:  #f0f7f3;
  --green-bd:  #b0d8c0;
  --grey:      #666666;
  --grey-bg:   #f2f2f2;
  --grey-bd:   #dddddd;
}

/* ---- Reset ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Source Sans 3', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.7;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

/* ---- Nav ---- */
nav {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  padding: 0 48px;
  display: flex;
  align-items: center;
  min-height: 52px;
  gap: 32px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-name {
  font-family: 'Lora', serif;
  font-size: 16px;
  color: var(--text);
  margin-right: auto;
  padding-right: 32px;
  text-decoration: none;
}
.nav-name:hover { text-decoration: none; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
nav a.nav-link {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-2);
  text-decoration: none;
}
nav a.nav-link:hover { color: var(--blue); text-decoration: none; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 18px;
  color: var(--text-2);
  cursor: pointer;
  padding: 4px;
}

/* ---- Page layout ---- */
.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 56px 32px 80px;
  display: grid;
  grid-template-columns: 192px 1fr;
  gap: 56px;
}

/* ---- Sidebar ---- */
.sidebar { }

.avatar {
  width: 148px;
  height: 148px;
  border-radius: 4px;
  object-fit: cover;
  margin-bottom: 18px;
}
.avatar-placeholder {
  width: 148px;
  height: 148px;
  border-radius: 4px;
  background: linear-gradient(135deg, #d0ddf0, #b0c4e0);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Lora', serif;
  font-size: 44px;
  color: #5a7aaa;
  margin-bottom: 18px;
  letter-spacing: -2px;
}

.sidebar-name {
  font-family: 'Lora', serif;
  font-size: 21px;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 2px;
}
.sidebar-role {
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 20px;
}

/* Research interest tags */
.interest-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 22px;
}
.itag {
  font-size: 12.5px;
  color: var(--blue);
  border: 1px solid var(--blue-bd);
  background: var(--blue-bg);
  padding: 2px 8px;
  border-radius: 3px;
}

hr.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 18px 0;
}

.connect { list-style: none; font-size: 14px; }
.connect li { padding: 3px 0; color: var(--text-2); }
.connect li span.icon { display: inline-block; width: 20px; margin-right: 6px; text-align: center; color: var(--text-3); }

/* Institution chips */
.inst-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 18px;
}
.inst {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text-2);
  border: 1px solid var(--border);
  padding: 4px 9px 4px 5px;
  border-radius: 3px;
  background: var(--surface);
  cursor: default;
}
.inst-logo {
  width: 18px;
  height: 18px;
  border-radius: 2px;
  flex-shrink: 0;
  object-fit: contain;
}

/* ---- Main content ---- */
.main { min-width: 0; }

section { margin-bottom: 52px; }

.sec-title {
  font-family: 'Lora', serif;
  font-size: 20px;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  padding-bottom: 10px;
  margin-bottom: 24px;
}

/* ---- Bio ---- */
.bio-intro {
  font-family: 'Lora', serif;
  font-size: 18px;
  font-style: italic;
  color: var(--text-2);
  margin-bottom: 18px;
  line-height: 1.6;
}
.bio p {
  font-size: 15.5px;
  color: var(--text-2);
  margin-bottom: 12px;
  line-height: 1.75;
}
.bio p strong { color: var(--text); font-weight: 600; }
.collab-note {
  font-size: 14.5px;
  color: var(--text-2);
  border-left: 2px solid var(--blue);
  padding: 8px 14px;
  background: var(--blue-bg);
  margin-top: 18px;
  border-radius: 0 3px 3px 0;
}

/* ---- News ---- */
.news-list { list-style: none; }
.news-list li {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14.5px;
  color: var(--text-2);
  line-height: 1.6;
}
.news-list li:last-child { border-bottom: none; }
.news-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-3);
  padding-top: 3px;
}
.show-more {
  font-size: 13.5px;
  color: var(--text-3);
  cursor: pointer;
  margin-top: 10px;
  background: none;
  border: none;
  padding: 0;
  display: block;
}
.show-more:hover { color: var(--blue); }
.news-hidden { display: none; }

/* ---- Publications ---- */
.pub-filters {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.fbtn {
  font-size: 13px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 2px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-2);
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: all 0.15s;
}
.fbtn.active { background: var(--text); color: white; border-color: var(--text); }
.fbtn:hover:not(.active) { border-color: var(--text-2); }

.pub {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
}
.pub:last-child { border-bottom: none; }
.pub[data-hidden="true"] { display: none; }

.pub-thumb {
  width: 180px;
  aspect-ratio: 4/3;
  border-radius: 3px;
  background: transparent;
  object-fit: contain;
  flex-shrink: 0;
}
.pub-thumb-placeholder {
  width: 180px;
  aspect-ratio: 4/3;
  border-radius: 3px;
  background: var(--blue-bg);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  flex-shrink: 0;
}

/* Venue tag */
.venue-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 9px;
  border-radius: 3px;
  margin-bottom: 6px;
  letter-spacing: 0.03em;
}
.vt-blue   { background: var(--blue-bg);  color: var(--blue);  border: 1px solid var(--blue-bd); }
.vt-gold   { background: var(--gold-bg);  color: var(--gold);  border: 1px solid var(--gold-bd); }
.vt-grey   { background: var(--grey-bg);  color: var(--grey);  border: 1px solid var(--grey-bd); }
.vt-green  { background: var(--green-bg); color: var(--green); border: 1px solid var(--green-bd); }

.pub-title {
  font-size: 15.5px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 5px;
  letter-spacing: -0.01em;
}
.pub-title a { color: var(--text); }
.pub-title a:hover { color: var(--blue); text-decoration: none; }

.pub-tldr {
  font-size: 13.5px;
  color: var(--text-3);
  font-style: italic;
  margin-bottom: 7px;
  line-height: 1.5;
  border-left: 2px solid var(--border);
  padding-left: 10px;
}

.pub-authors {
  font-size: 13.5px;
  color: var(--text-2);
  margin-bottom: 10px;
  line-height: 1.5;
}
.me {
  font-weight: 600;
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: #aac;
  text-underline-offset: 2px;
}

/* Publication links */
.pub-links { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.pl {
  font-size: 13px;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
  padding-bottom: 1px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  transition: color 0.15s, border-color 0.15s;
}
.pl svg { width: 12px; height: 12px; flex-shrink: 0; stroke: currentColor; }
.pl:hover { color: var(--blue); border-color: var(--blue); text-decoration: none; }

/* ---- Experiences ---- */
.exp { margin-bottom: 28px; }
.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 3px;
}
.exp-company { font-weight: 600; font-size: 15.5px; }
.exp-period {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-3);
  flex-shrink: 0;
  white-space: nowrap;
}
.exp-role { font-size: 14px; color: var(--text-2); margin-bottom: 8px; }
.exp-points { list-style: none; }
.exp-points li {
  font-size: 14.5px;
  color: var(--text-2);
  padding-left: 14px;
  position: relative;
  margin-bottom: 3px;
  line-height: 1.6;
}
.exp-points li::before { content: '—'; position: absolute; left: 0; color: var(--text-3); }
.exp-outcome {
  display: inline-block;
  font-size: 13px;
  color: var(--green);
  margin-top: 8px;
}
.exp-outcome a { color: var(--green); }

/* ---- Service ---- */
.service-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.svc-group-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 10px;
}
.svc-sub {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: 4px;
  margin-top: 10px;
}
.venue-list { display: flex; flex-wrap: wrap; gap: 4px; }
.vtag {
  font-size: 13px;
  color: var(--text-2);
  border: 1px solid var(--border);
  padding: 1px 7px;
  border-radius: 2px;
}

/* ---- Footer ---- */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 48px;
  font-size: 13px;
  color: var(--text-3);
  background: var(--surface);
}
.footer-container {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
}
.footer-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.footer-map {
  justify-self: end;
}
a#clustrmaps-widget-v2, #clustrmaps-widget-v2 { display: inline; }
footer a { color: var(--text-3); }
footer a:hover { color: var(--blue); }

/* ---- Responsive ---- */
@media (max-width: 720px) {
  nav { padding: 0 20px; gap: 16px; flex-wrap: wrap; }
  /* .nav-lastname { display: none; } */
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding-bottom: 12px;
  }
  .nav-links.open { display: flex; }
  .wrap { grid-template-columns: 1fr; gap: 24px; padding: 24px 16px 60px; }

  /* Sidebar: compact card layout */
  .sidebar {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto;
    gap: 0 16px;
    align-items: start;
  }

  /* Avatar sits top-left, spans name + role rows */
  .avatar, .avatar-placeholder {
    width: 88px;
    height: 88px;
    margin-bottom: 0;
    grid-row: 1 / 3;
    grid-column: 1;
    align-self: center;
  }

  /* Name top-right */
  .sidebar-name {
    grid-row: 1;
    grid-column: 2;
    font-size: 18px;
    line-height: 1.25;
    margin-bottom: 0;
    align-self: end;
  }

  /* Role bottom-right */
  .sidebar-role {
    grid-row: 2;
    grid-column: 2;
    font-size: 13px;
    margin-bottom: 0;
    align-self: start;
    padding-top: 3px;
  }

  /* Interest tags span full width */
  .interest-tags {
    grid-column: 1 / -1;
    margin-top: 10px;
    margin-bottom: 10px;
    gap: 4px;
  }
  .itag { font-size: 11.5px; padding: 2px 7px; }

  /* Dividers span full width */
  hr.divider {
    grid-column: 1 / -1;
    margin: 8px 0;
  }

  /* Connect list: 2-column grid */
  .connect {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px 12px;
    font-size: 13.5px;
  }
  .connect li { padding: 3px 0; }

  /* Institution chips span full width */
  .inst-row {
    grid-column: 1 / -1;
    margin-top: 8px;
    gap: 5px;
  }
  .inst { font-size: 11.5px; padding: 3px 7px 3px 4px; }
  .inst-logo { width: 15px; height: 15px; }

  .pub { grid-template-columns: 1fr; }
  .pub-thumb, .pub-thumb-placeholder { width: 100%; aspect-ratio: 16/9; }
  .service-grid { grid-template-columns: 1fr; gap: 20px; }
  footer { padding: 20px; }
  .footer-container {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
    gap: 16px;
  }
  .footer-map { justify-self: center; order: -1; }
  .footer-left { align-items: center; }
  .exp-header { flex-direction: column; gap: 2px; }
}