/* Top-tabs modern theme — wider content */

:root{
  /* glass theme as default */
  --bg: linear-gradient(180deg,#eff8ff,#ffffff);
  --surface: rgba(255,255,255,0.7);
  --surface-1: rgba(255,255,255,0.85);
  --text: #0b1320;
  --muted: #475569;
  --meta: #6b7280;
  --accent: #06b6d4;
  --border: rgba(6,182,212,0.14);
  --shadow: 0 14px 36px rgba(2,6,23,0.10);
  --focus-ring: rgba(6,182,212,0.45);
  --color-accent: var(--accent);
  --color-code-bg: rgba(2,6,23,0.05);
  --error: #dc2626;

  --radius: 14px;
  --maxw: 1180px;
  --pad: 1.2rem;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color-scheme: light dark;
}

/* Typography improvements */
html { font-size: 16px; }
body { font-size: 1rem; line-height: 1.6; -webkit-font-smoothing: antialiased; }
h1,h2,h3 { color: var(--text); margin-top: 0; font-weight:700; line-height:1.2 }
h2 { font-size: 1.35rem; margin-bottom: .5rem; }
h3 { font-size: 1.05rem; margin-bottom: .35rem; color: var(--muted); font-weight:600 }

/* layout */
*{box-sizing:border-box}
html,body{height:100%}
html { color-scheme: light dark; }

/* remove page gradient and use a stable background color */
body{
  /* background: linear-gradient(180deg,#f7fbff,#eef6ff); */
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  transition: background-color 0.25s ease, color 0.25s ease;
  -webkit-text-size-adjust: 100%;
  -webkit-print-color-adjust: exact;
  color-adjust: exact;
}

main{padding-bottom:2rem;}

.wrap{
  width: min(var(--maxw), 100% - 2.5rem);
  margin: 0 auto;
}
.wrap.wide{
  width: min(1300px, 100% - 2.5rem);
}

/* header */
.site-header{background:var(--surface);position:sticky;top:0;z-index:40;backdrop-filter: blur(10px);padding-top:.75rem;padding-bottom:.6rem;border-bottom:1px solid var(--border)}
.header-row{display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand-link{font-weight:700;color:var(--text);text-decoration:none;font-size:1.1rem}
.brand-sub{font-size:.9rem;color:var(--muted)}

/* top tabs */
.top-tabs{display:flex;gap:.5rem;justify-content:center;margin-top:.6rem;padding:0 8px}
.top-tabs [role="tab"]{
  background:transparent;border:0;padding:.6rem .95rem;border-radius:999px;cursor:pointer;font-weight:600;color:var(--muted);
  transition:transform .12s ease, background .12s ease, color .12s ease;
}
.top-tabs [role="tab"][aria-selected="true"]{
  color:white;background:var(--accent);transform:none;box-shadow:0 8px 24px rgba(37,99,235,0.14);
  border: 1px solid rgba(0,0,0,0.06);
}
.top-tabs [role="tab"]:hover{
  background: rgba(6,182,212,0.14);
  color: var(--text);
}

/* panels */
.panel{margin-top:1rem;background:var(--surface-1);padding:1.4rem;border-radius:12px;border:1px solid rgba(15,23,42,0.04);box-shadow:0 12px 30px rgba(11,15,30,0.05)}
.panel h1{margin-top:0}
.panel-grid{display:grid;grid-template-columns:220px 1fr;gap:1rem;align-items:start}
.panel h2{
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
  position: relative;
}
.panel h2::after{
  content: "";
  display: block;
  width: 56px;
  height: 3px;
  border-radius: 999px;
  background: var(--accent);
  opacity: 0.6;
  margin-top: 0.35rem;
}
.panel p{color:var(--text);}
.panel ul{padding-left:1.1rem;}
.panel li{margin:0.2rem 0;}
.panel-grid .right > *:first-child{margin-top:0;}

/* update panel and avatar to use semantic radii and shadows */
.panel{ border-radius:var(--radius); box-shadow:var(--shadow); background:var(--surface-1); border:1px solid var(--border); }
.avatar{ width:200px;height:200px;border-radius: calc(var(--radius) - 2px);border:1px solid rgba(15,23,42,0.06);box-shadow:0 10px 30px rgba(11,15,30,0.06);object-fit:cover;}

/* avatar ring in dark mode */
@media (prefers-color-scheme: dark) {
  .avatar{ box-shadow: 0 6px 18px rgba(0,0,0,0.6); border-color: rgba(255,255,255,0.05); }
}

/* quick links */
.quick-links a{color:var(--accent);text-decoration:none;margin-right:.6rem}

/* selected publications list */
.publication-list{
  list-style:none;
  padding:0;
  margin:0.6rem 0 0;
  display:grid;
  gap:0.65rem;
}
.publication-list li{
  padding:0.7rem 0.9rem;
  border-radius:12px;
  background:var(--surface);
  border:1px solid var(--border);
  box-shadow:0 8px 20px rgba(11,15,30,0.04);
}

/* publications grid */
.pub-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem;margin-top:.6rem}
.pub-card{padding:1rem;border-radius:10px;background:linear-gradient(180deg,#fff,#fbfdff);border:1px solid rgba(15,23,42,0.04);box-shadow:0 8px 20px rgba(11,15,30,0.04)}

/* Publications controls */
.pub-controls {
  display:flex;
  gap:.6rem;
  align-items:center;
  flex-wrap:wrap;
  margin:0.6rem 0 0.9rem;
}
.pub-controls input[type="search"]{
  flex:1 1 240px;
  min-width:160px;
  padding:.5rem .7rem;
  border:1px solid var(--border);
  border-radius:8px;
  background:var(--surface-1);
  color:var(--text);
}
.pub-controls select,
.pub-controls button{
  padding:.48rem .7rem;
  border-radius:8px;
  border:1px solid var(--border);
  background:var(--surface);
  color:var(--text);
  font-weight:600;
  cursor:pointer;
}
.pub-controls button[aria-pressed="true"]{background:var(--accent);color:#fff;}

.no-results{color:var(--muted);margin:.6rem 0;}

/* Card view */
#panel-pubs.card-view .pub-compact-list{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:1rem;
}
#panel-pubs.card-view .pub-item{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:10px;
  padding:.9rem 1rem;
  box-shadow:0 8px 20px rgba(11,15,30,0.04);
  margin:0;
}

/* Collapsible abstracts */
.pub-abstract{
  transition:max-height .2s ease,opacity .2s ease;
  overflow:hidden;
  max-height:2000px;
  opacity:1;
  margin-top:.35rem;
  font-size:.85rem;
  color:var(--muted);
  line-height:1.5;
}
.pub-abstract.collapsed{max-height:0;opacity:0;margin-top:0;padding-top:0;}

@media(max-width:720px){
  .pub-abstract{max-height:0;opacity:0;}
  .pub-abstract.expanded{max-height:2000px;opacity:1;}
}

/* hover/focus affordances are now on .pub-item in the main rules */

/* small screens: collapse abstracts by default */
@media (max-width:720px){
  .pub-abstract { max-height:0; opacity:0; }
  .pub-abstract.collapsed { max-height:0; }
  .pub-abstract.expanded { max-height:2000px; opacity:1; }
}

/* Skip to content link for accessibility */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: #003366;
  color: white;
  padding: 8px;
  text-decoration: none;
  z-index: 100;
}

.skip-to-content:focus {
  top: 0;
}

/* keyboard focus styles (accessible) */
:focus { outline: none; }
:focus-visible { outline: 3px solid var(--focus-ring); outline-offset: 3px; border-radius: 6px; }
.top-tabs [role="tab"]:focus-visible { outline-offset: 3px; border-radius: 999px; }

/* links and strong emphasis */
a { color: var(--accent); text-decoration: underline; text-decoration-thickness: from-font; text-underline-offset: 0.18em; transition: color 0.2s ease, opacity 0.2s ease; }
a:focus-visible { box-shadow: 0 0 0 4px rgba(37,99,235,0.08); border-radius: 6px; }

/* subtle lift on interactive cards */
.pub-card, .panel { transition: transform .18s cubic-bezier(.22,.9,.35,1), box-shadow .18s ease; }
.pub-card:hover, .panel:hover { transform: translateY(-4px); box-shadow: 0 18px 40px rgba(2,6,23,0.08); }

/* news list */
ul.news-list {
  list-style: disc;
  padding-left: 1.2rem;
  margin: 0;
}
.news-list li {
  padding: .25rem 0;
  color: var(--muted);
  line-height: 1.45;
  font-size: 0.92rem;
  list-style-position: outside;
}
.news-link{
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95em;
  margin-left: 0.15rem;
}

/* back-to-top utility (add JS to toggle) */
.back-to-top {
  position: fixed; right: 1rem; bottom: 1.25rem; background: var(--accent); color: white;
  width: 44px; height: 44px; border-radius: 999px; display:grid; place-items:center; box-shadow: 0 8px 22px rgba(2,6,23,0.22);
  opacity: 0.95; transition: transform .18s ease, opacity .18s ease; z-index:1000;
}
.back-to-top:focus-visible { transform: translateY(-2px); }

/* accessible helper */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* Panels forced to use surface + readable text (prevents UA forced-dark issues) */
body { background: var(--bg); color: var(--text); }
.panel { background: var(--surface-1); color: var(--text); border: 1px solid var(--border); }

/* responsive */
@media (max-width:980px){
  .panel-grid{grid-template-columns:140px 1fr}
  .avatar{width:140px;height:140px}
}
@media (max-width:720px){
  .panel-grid{grid-template-columns:1fr;grid-auto-rows:min-content}
  .avatar{width:120px;height:120px;margin:0 auto;display:block}
  .top-tabs{justify-content:flex-start;overflow:auto;padding-left:8px}
  .wrap{padding:12px}
}
@media (max-width: 768px) {
  .top-tabs {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  
  .top-tabs button {
    font-size: 0.9rem;
    padding: 0.6rem 0.8rem;
  }
  
  .panel-grid {
    grid-template-columns: 1fr;
  }
  
  .avatar {
    max-width: 150px;
  }
}

/* Color scheme support */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #071024;
    --surface: #0b1528;
    --surface-1: #0f1b33;
    --text: #e6eef8;
    --muted: #93a4bf;
    --meta: #89a0c0;
    --accent: #66b3ff;
    --border: rgba(255,255,255,0.06);
    --shadow: 0 18px 44px rgba(0,0,0,0.45);
    --color-code-bg: rgba(255,255,255,0.06);
  }
}

/* ensure panels have explicit surface + text colors (prevents forced/auto-dark pitfalls) */
.panel {
  background: var(--surface-1);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: 0 10px 30px rgba(2,6,23,0.06);
  /* prevent some UA forced color changes */
  forced-color-adjust: none;
  -webkit-text-fill-color: var(--text);
}

/* ensure all panel children inherit correct text color (preserve link accents) */
.panel, .panel *:not(a) {
  color: var(--text);
}

/* Improve contact list alignment */
.contact-list {
  list-style: none;
  padding: 0;
}

.contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 1rem;
  padding: 0.5rem 0;
}

.contact-list .icon {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--accent);
  -webkit-text-fill-color: var(--accent);
}

/* Lazy load images */
img[loading="lazy"] {
  background-color: var(--color-code-bg);
}

/* Improve readability */
a:hover {
  opacity: 0.85;
}

/* Better print styles */
@media print {
  .top-tabs,
  .site-header nav,
  .skip-to-content {
    display: none;
  }
  
  body {
    color: #000;
    background: white;
  }
}

/* footer */
.site-footer{
  margin-top: 2rem;
  padding: 1.25rem 0 2rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  text-align: center;
}

/* ─── Publications ─────────────────────────────────────────────────────────── */
#panel-pubs { overflow-x: hidden; }
#panel-pubs .panel-inner {
  max-width: 1200px;
  margin-left: 1.5rem;
  margin-right: 1.5rem;
  padding-left: 1rem;
  padding-right: 1rem;
}
.pub-summary { color: var(--muted); margin-bottom: 0.75rem; }
.pub-year-heading {
  margin: 1.2rem 0 0.6rem;
  font-size: 1.1rem;
  color: var(--accent);
  border-bottom: 2px solid var(--border);
  padding-bottom: 0.25rem;
}
.pub-compact-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr; gap: 0.85rem; }
.pub-item { padding: 0.7rem 0.8rem; border-left: 3px solid transparent; border-bottom: 1px solid var(--border); border-radius: 4px; transition: border-color .15s, background .15s; }
.pub-item:hover, .pub-item:focus-within { border-left-color: var(--accent); background: color-mix(in srgb, var(--accent) 5%, transparent); transform: translateY(-1px); }
/* Title line */
.pub-title { font-size: 1rem; line-height: 1.4; margin-bottom: 0.25rem; }
.pub-title strong { font-weight: 650; color: var(--text); }
/* Venue line — prominent */
.pub-venue { font-size: 0.88rem; font-weight: 600; color: var(--accent); margin-bottom: 0.3rem; letter-spacing: .01em; }
.pub-venue::before { content: "📍 "; font-style: normal; }
/* Footer: authors left, links right */
.pub-footer { display: flex; align-items: baseline; justify-content: space-between; gap: 0.5rem; flex-wrap: wrap; }
.pub-authors { color: var(--muted); font-size: 0.82rem; flex: 1 1 auto; }
.pub-links { display: flex; gap: 0.35rem; flex-shrink: 0; }
.pub-link { margin-left: 0; padding: 0.1rem 0.45rem; border: 1px solid var(--accent); border-radius: 4px; font-size: 0.78rem; text-decoration: none; color: var(--accent); font-weight: 600; white-space: nowrap; transition: background .12s, color .12s; }
.pub-link:hover { background: var(--accent); color: #fff; }
.pub-meta { color: var(--meta); font-size: 0.9rem; }
@media (min-width: 900px) {
  .pub-compact-list { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
  #panel-pubs .panel-inner { margin-left: 2rem; margin-right: 2rem; }
}

/* ─── Quick links & CV button ───────────────────────────────────────────────── */
.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1rem 0;
}
.quick-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}
.quick-links a:hover { background: var(--accent); color: #fff; box-shadow: 0 4px 12px rgba(6,182,212,0.25); }
.cv-btn {
  background: var(--accent) !important;
  color: #fff !important;
  border-color: transparent !important;
}
.cv-btn:hover { opacity: 0.88; }

/* ─── Panel fade-in animation ────────────────────────────────────────────────── */
@keyframes panel-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
[role="tabpanel"]:not([hidden]) { animation: panel-in 0.22s ease both; }

/* ─── Funded project cards ────────────────────────────────────────────────── */
.project-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 0.75rem;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: 0 6px 18px rgba(11,15,30,0.05);
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
}
.project-card-header h4 {
  margin: 0;
  font-size: 0.97rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}
.project-role {
  flex-shrink: 0;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  background: rgba(6,182,212,0.12);
  color: var(--accent);
  white-space: nowrap;
}
.project-meta {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.15rem 0.6rem;
  margin: 0;
  font-size: 0.85rem;
}
.project-meta dt { color: var(--muted); font-weight: 600; white-space: nowrap; }
.project-meta dd { margin: 0; color: var(--text); }
.project-objectives {
  font-size: 0.88rem;
  color: var(--muted);
}
.project-objectives summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--accent);
  list-style: none;
  padding: 0.2rem 0;
}
.project-objectives summary::-webkit-details-marker { display: none; }
.project-objectives summary::before { content: "▸ "; font-size: 0.8em; }
details[open] .project-objectives summary::before,
.project-objectives[open] summary::before { content: "▾ "; }
.project-objectives ul { margin: 0.35rem 0 0; padding-left: 1.2rem; }
.project-objectives li { margin: 0.2rem 0; }

/* ─── Teaching table ─────────────────────────────────────────────────────── */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.courses-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin-top: 0.5rem;
}
.courses-table th {
  text-align: left;
  padding: 0.55rem 0.75rem;
  background: var(--surface);
  color: var(--accent);
  font-weight: 700;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}
.courses-table td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: top;
}
.courses-table tbody tr:hover td { background: rgba(6,182,212,0.04); }

/* reduced motion user preference */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  .pub-card:hover, .panel:hover { transform: none; box-shadow: var(--shadow); }
}

/* small responsive type tweak for narrow screens */
@media (max-width:720px) {
  h2 { font-size: 1.15rem; }
  body { font-size: 0.98rem; }
}

/* If needed: small fallback for publication summary color (keeps consistent look) */
.pub-summary { color: var(--muted); }

/* research blocks */
#panel-research .research-block {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.85rem 1rem;
  margin: 0.9rem 0;
  box-shadow: 0 8px 20px rgba(11,15,30,0.04);
}
#panel-research .research-block h3 { margin-top: 0; margin-bottom: 0.35rem; }
#panel-research .research-block p { margin-top: 0; margin-bottom: 0.5rem; color: var(--text); }
#panel-research .research-block ul { margin: 0.2rem 0 0; padding-left: 1.2rem; }

/* Base (Glass) */
:root,
:root[data-theme="glass"]{
  --bg: linear-gradient(180deg,#eff8ff,#ffffff);
  --surface: rgba(255,255,255,0.7);
  --surface-1: rgba(255,255,255,0.85);
  --text: #0b1320;
  --muted: #475569;
  --meta: #6b7280;
  --accent: #06b6d4;
  --border: rgba(6,182,212,0.12);
}

/* Slate (muted pro) */
:root[data-theme="slate"]{
  --bg: #0f172a;
  --surface: #111827;
  --surface-1: #111c34;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --meta: #94a3b8;
  --accent: #38bdf8;
  --border: rgba(255,255,255,0.08);
}

/* Sand (warm neutral) */
:root[data-theme="sand"]{
  --bg: #f7f1e8;
  --surface: #ffffff;
  --surface-1: #fffaf2;
  --text: #1f2933;
  --muted: #5f6c72;
  --meta: #8a6d46;
  --accent: #d97706;
  --border: rgba(0,0,0,0.08);
}

/* Ink (high-contrast) */
:root[data-theme="ink"]{
  --bg: #0b0f1a;
  --surface: #0f1720;
  --surface-1: #121d2a;
  --text: #f4f5f7;
  --muted: #9ea7b3;
  --meta: #7dd3fc;
  --accent: #22d3ee;
  --border: rgba(255,255,255,0.12);
}

/* Themes */
:root,
:root[data-theme="glass"]{
  --bg: linear-gradient(180deg,#eff8ff,#ffffff);
  --surface: rgba(255,255,255,0.75);
  --surface-1: rgba(255,255,255,0.88);
  --text: #0b1320;
  --muted: #475569;
  --meta: #6b7280;
  --accent: #06b6d4;
  --border: rgba(6,182,212,0.15);
}
:root[data-theme="slate"]{
  --bg:#0f172a; --surface:#111827; --surface-1:#111c34; --text:#e5e7eb; --muted:#9ca3af; --meta:#94a3b8; --accent:#38bdf8; --border:rgba(255,255,255,0.08);
}
:root[data-theme="sand"]{
  --bg:#f7f1e8; --surface:#ffffff; --surface-1:#fffaf2; --text:#1f2933; --muted:#5f6c72; --meta:#8a6d46; --accent:#d97706; --border:rgba(0,0,0,0.08);
}
:root[data-theme="ink"]{
  --bg:#0b0f1a; --surface:#0f1720; --surface-1:#121d2a; --text:#f4f5f7; --muted:#9ea7b3; --meta:#7dd3fc; --accent:#22d3ee; --border:rgba(255,255,255,0.12);
}

/* Theme selector */
.header-right{display:flex;align-items:center;gap:.5rem;}
.theme-toggle{font-weight:600;color:var(--text);}
#theme-select{
  padding:.38rem .6rem;
  border-radius:8px;
  border:1px solid var(--border);
  background:var(--surface);
  color:var(--text);
}