:root{
  --bg:#fcfcfc;
  --card:transparent;
  --text:#1a1a1a;
  --muted:#666666;
  --border:#e3e3e3;
  --link:#1f5fbf;
}

*{box-sizing:border-box}

html,body{
  margin:0;
  padding:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
}

body{
  font-size:16px;
}

a{
  color:var(--link);
  text-decoration:none;
}

a:hover{
  text-decoration:underline;
}

code{
  background:#f3f3f3;
  padding:.12rem .3rem;
  border-radius:.25rem;
  font-size:.92em;
}

/* ===== Overall layout ====== */
.page{
  max-width:1280px;
  margin:0 auto;
  padding:32px 28px 40px;
  display:grid;
  grid-template-columns:280px minmax(0,1fr);
  gap:42px;
}

.sidebar{
  align-self:start;
}

.profile-card{
  position:sticky;
  top:28px;
}

/* ===== Left sidebar ===== */
.avatar{
  margin-bottom:18px;
}

.profile-photo{
  width:180px;
  height:180px;
  border-radius:50%;
  object-fit:cover;
  border:2px solid #e6e6e6;
  display:block;
}

.id{
  text-align:left;
}

.id h1{
  margin:0 0 10px 0;
  font-size:1.6rem;
  line-height:1.15;
  font-weight:700;
  letter-spacing:.01em;
}

.position{
  margin:0 0 14px 0;
  color:var(--muted);
  line-height:1.55;
  font-size:1rem;
}

.affiliation{
  margin:0 0 10px 0;
  color:var(--muted);
  line-height:1.6;
  font-size:.98rem;
}

.contact-item{
  margin:0 0 6px 0;
  color:var(--muted);
  line-height:1.5;
  font-size:.98rem;
}

/* ===== Right content area ===== */
.main-content{
  min-width:0;
}

.topbar{
  margin-bottom:10px;
}

.nav{
  display:flex;
  gap:18px;
  flex-wrap:wrap;
  padding-bottom:12px;
  border-bottom:1px solid var(--border);
}

.nav a{
  padding:0;
  border:none;
  border-radius:0;
  background:none;
  color:var(--text);
  font-size:1rem;
}

.nav a:hover{
  background:none;
  color:var(--link);
  text-decoration:none;
}

.nav a.active{
  font-weight:600;
  border-bottom:2px solid var(--link);
  padding-bottom:2px;
}

/* ===== Section blocks ====== */
.card{
  background:transparent;
  border:none;
  border-top:1px solid var(--border);
  border-radius:0;
  padding:20px 0 0 0;
  margin-top:24px;
}

.card h2{
  margin:0 0 14px 0;
  font-size:1.22rem;
  font-weight:700;
  letter-spacing:.01em;
}

.card h3{
  margin:16px 0 8px 0;
  font-size:1.02rem;
  font-weight:700;
}

.card p{
  margin:0 0 14px 0;
  color:var(--text);
  line-height:1.75;
}

.bullets{
  margin:0;
  padding-left:20px;
  color:var(--text);
  line-height:1.75;
}

.bullets li{
  margin-bottom:4px;
}

/* ===== News ===== */
.timeline{
  margin:0;
  padding-left:20px;
  color:var(--text);
  line-height:1.8;
}

.timeline li{
  margin-bottom:8px;
}

.timeline .date{
  display:inline-block;
  min-width:110px;
  color:var(--muted);
  font-weight:600;
}

/* ===== Research grid ===== */
.grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:14px;
  margin-top:8px;
}

.tile{
  border:1px solid var(--border);
  border-radius:4px;
  padding:14px;
  background:#ffffff;
}

.tile h3{
  margin:0 0 8px 0;
  font-size:1rem;
}

.tile p{
  margin:0;
  color:var(--muted);
  line-height:1.65;
  font-size:.97rem;
}

/* ===== Publication controls ===== */
.pub-controls{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin-bottom:14px;
}

.pub-controls input,
.pub-controls select{
  background:#ffffff;
  border:1px solid var(--border);
  color:var(--text);
  border-radius:3px;
  padding:9px 11px;
  outline:none;
  font-family:inherit;
  font-size:.96rem;
}

.pub-controls input:focus,
.pub-controls select:focus{
  border-color:var(--link);
}

/* ===== Publication list ===== */
.pub-list{
  display:flex;
  flex-direction:column;
  gap:0;
}

.pub{
  border:none;
  border-bottom:1px solid var(--border);
  border-radius:0;
  padding:14px 0;
  background:transparent;
}

.pub .title{
  font-weight:700;
  line-height:1.55;
}

.pub .authors,
.pub .venue{
  color:var(--muted);
  margin-top:4px;
  line-height:1.65;
  font-size:.97rem;
}

.pub .links{
  margin-top:7px;
  font-size:.96rem;
}

.pub .tag{
  display:inline-block;
  font-size:.72rem;
  padding:1px 7px;
  border:1px solid var(--border);
  border-radius:999px;
  margin-left:8px;
  color:var(--muted);
  background:#fafafa;
  vertical-align:middle;
}

/* ===== Other blocks ===== */
.project{
  margin-bottom:16px;
}

.project h3{
  margin:0 0 6px;
}

.project p{
  margin:0;
  color:var(--text);
  line-height:1.7;
}

.hint{
  color:var(--muted);
  font-size:.95rem;
}

/* ===== Footer ===== */
.footer{
  color:var(--muted);
  text-align:left;
  padding:28px 0 10px;
  font-size:.94rem;
}

/* ===== Responsive ===== */
@media (max-width:980px){
  .page{
    grid-template-columns:1fr;
    gap:28px;
    padding:24px 18px 32px;
  }

  .profile-card{
    position:static;
  }

  .profile-photo{
    width:140px;
    height:140px;
  }

  .grid{
    grid-template-columns:1fr;
  }

  .timeline .date{
    min-width:0;
    margin-right:8px;
  }
}

/* ===== Multimedia ===== */
.video-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
  margin-top:10px;
}

.video-item h3{
  margin:10px 0 6px 0;
  font-size:1rem;
}

.video-item p{
  margin:0;
  color:var(--muted);
  line-height:1.65;
  font-size:.97rem;
}

.video-frame{
  position:relative;
  width:100%;
  aspect-ratio:16/9;
  background:#000;
  border:1px solid var(--border);
  overflow:hidden;
}

.video-frame iframe{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  border:0;
}

@media (max-width:980px){
  .video-grid{
    grid-template-columns:1fr;
  }
}

.video-authors,
.video-related,
.video-venue{
  margin-top:6px;
  color:var(--muted);
  font-size:.95rem;
  line-height:1.6;
}

.video-authors strong,
.video-related strong{
  color:var(--text);
}

.video-related a,
.video-venue a{
  color:var(--link);
}

.contact-item a{
  display:inline-flex;
  align-items:center;
  gap:8px;
}

.icon{
  width:16px;
  height:16px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--muted);
  flex:0 0 16px;
}

.icon svg{
  width:16px;
  height:16px;
  display:block;
}