/* 
  Minimal, academic-friendly portfolio style.
  Accessibility notes:
  - Uses rem units for scalable text
  - Maintains strong contrast in both themes
  - Focus rings are visible
*/

:root{
  --bg: #f7f7fb;
  --bg-alt: #eef0f7;
  --text: #1c1f2a;
  --muted: #505869;
  --card: #ffffff;
  --border: rgba(28,31,42,.12);
  --accent: #3f51b5;
  --accent-2: #e4572e;
  --shadow: 0 12px 30px rgba(17,24,39,.1);
  --radius: 18px;
  --max: 1100px;
  --focus: 3px solid rgba(63,81,181,.5);
  --selection-bg: #294bd3;
  --selection-text: #ffffff;
  color-scheme: light dark;
}

html[data-theme="dark"]{
  --bg: #0f111a;
  --bg-alt: #171a25;
  --text: #eef1f7;
  --muted: #c4c9d6;
  --card: #141823;
  --border: rgba(226,232,240,.14);
  --accent: #8ea1ff;
  --accent-2: #ff8a5c;
  --shadow: 0 10px 30px rgba(0,0,0,.4);
  --selection-bg: #a9b9ff;
  --selection-text: #0f1324;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family: system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;
  line-height:1.6;
  background:var(--bg);
  color:var(--text);
}

::selection{
  background: var(--selection-bg);
  color: var(--selection-text);
  text-shadow: none;
}

::-moz-selection{
  background: var(--selection-bg);
  color: var(--selection-text);
  text-shadow: none;
}

a{ color:var(--accent); text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover{ text-decoration-thickness: 3px; }

.skip-link{
  position:absolute; left:-999px; top:auto;
  width:1px; height:1px; overflow:hidden;
}
.skip-link:focus{
  left:1rem; top:1rem; width:auto; height:auto;
  background:var(--card); color:var(--text);
  padding:.7rem 1rem; border-radius:999px;
  border:1px solid var(--border);
  outline: var(--focus);
  z-index:9999;
}

.site-header{
  position:sticky; top:0; z-index:50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav{
  max-width:var(--max);
  margin:0 auto;
  display:flex;
  align-items:center;
  gap:1rem;
  padding:.9rem 1rem;
}

.brand{
  display:flex; align-items:center; gap:.55rem;
  color:var(--text);
  text-decoration:none;
  font-weight:700;
}
.brand__dot{
  width:12px; height:12px; border-radius:999px;
  background: linear-gradient(135deg,var(--accent),var(--accent-2));
}

.nav__links{
  margin-left:auto;
  display:flex; gap:1rem;
  flex-wrap:wrap;
  align-items:center;
}
.nav__links a{
  color:var(--muted);
  text-decoration:none;
  font-weight:600;
  padding:.35rem .5rem;
  border-radius:10px;
}
.nav__links a:hover, .nav__links a:focus{
  background: color-mix(in srgb, var(--bg-alt) 75%, transparent);
  color:var(--text);
  outline:none;
}
.theme-toggle{
  display:inline-flex; align-items:center; gap:.5rem;
  border:1px solid var(--border);
  background:var(--card);
  color:var(--text);
  padding:.45rem .7rem;
  border-radius:999px;
  box-shadow: none;
  cursor:pointer;
}
.theme-toggle:focus{ outline: var(--focus); outline-offset: 2px; }
.theme-toggle__icon{ font-size: 1.1rem; }

.nav__toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:2.35rem;
  height:2.35rem;
  border:1px solid var(--border);
  background:var(--card);
  color:var(--text);
  border-radius:10px;
  cursor:pointer;
}
.nav__toggle:focus{
  outline: var(--focus);
  outline-offset: 2px;
}
.nav__toggle-bar{
  position:relative;
  display:block;
  width:1rem;
  height:2px;
  background:currentColor;
  border-radius:999px;
  transition: background .2s ease;
}
.nav__toggle-bar::before,
.nav__toggle-bar::after{
  content:"";
  position:absolute;
  left:0;
  width:1rem;
  height:2px;
  background:currentColor;
  border-radius:999px;
  transition: transform .2s ease, top .2s ease;
}
.nav__toggle-bar::before{ top:-5px; }
.nav__toggle-bar::after{ top:5px; }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar{
  background:transparent;
}
.nav__toggle[aria-expanded="true"] .nav__toggle-bar::before{
  top:0;
  transform:rotate(45deg);
}
.nav__toggle[aria-expanded="true"] .nav__toggle-bar::after{
  top:0;
  transform:rotate(-45deg);
}

.hero{
  max-width:var(--max);
  margin:0 auto;
  padding: 3.25rem 1rem 1.75rem;
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap:2rem;
  align-items:center;
}

.kicker{
  margin:0 0 .5rem;
  color:var(--muted);
  font-weight:600;
}
h1{
  line-height:1.1;
  font-size: clamp(2rem, 4vw, 3rem);
  margin:.25rem 0 .75rem;
}
.lede{
  margin:0 0 1.25rem;
  font-size:1.1rem;
  color:var(--muted);
  max-width:60ch;
}

.hero__figure{
  margin:0;
  display:flex;
  justify-content:center;
}
.hero__figure img{
  width:min(340px, 80vw);
  height:auto;
  border-radius: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  background: var(--bg-alt);
}

.cta-row{ display:flex; gap:.75rem; flex-wrap:wrap; margin-bottom: 1rem; }
.button{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  font-weight:700;
  border-radius: 999px;
  padding:.7rem 1rem;
  text-decoration:none;
  border: 1px solid transparent;
  background: var(--accent);
  color: white;
}
.button:focus{ outline: var(--focus); outline-offset: 3px; }
.button--ghost{
  background: transparent;
  color: var(--accent);
  border-color: var(--border);
}
.button--ghost:hover{ background: color-mix(in srgb, var(--bg-alt) 75%, transparent); }

.meta{
  list-style:none; padding:0; margin: 0;
  display:grid; gap:.35rem;
  color: var(--muted);
}
.meta__label{ color: var(--text); font-weight:700; }

.section{
  padding: 3rem 1rem;
}
.section--alt{ background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.section__header{
  max-width:var(--max);
  margin:0 auto 1.5rem;
}
.section__header h2{
  margin:0;
  font-size: clamp(1.4rem, 2.3vw, 1.9rem);
}
.section__sub{ margin:.35rem 0 0; color: var(--muted); }

.grid{
  max-width:var(--max);
  margin:0 auto;
  display:grid;
  gap:1rem;
}
.grid--2{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3{ grid-template-columns: repeat(3, minmax(0, 1fr)); }

.card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.card h3{ margin-top:0; }
.list{ margin: .5rem 0 0; padding-left: 1.1rem; }
.list li{ margin: .35rem 0; }

.experience-showcase{
  max-width: var(--max);
  margin: 0 auto;
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 1rem;
}
.experience-showcase::before{
  content: "";
  position: absolute;
  inset: -.35rem;
  background:
    radial-gradient(900px 320px at 0% 0%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 68%),
    radial-gradient(900px 320px at 100% 100%, color-mix(in srgb, var(--accent-2) 14%, transparent), transparent 68%);
  pointer-events: none;
}
.exp-card{
  --exp-tone: var(--accent);
  --exp-tone-2: var(--accent-2);
  position: relative;
  z-index: 1;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--card) 90%, var(--exp-tone) 10%),
    var(--card)
  );
  border: 1px solid color-mix(in srgb, var(--exp-tone) 22%, var(--border));
  border-radius: 20px;
  padding: 1.15rem;
  box-shadow: var(--shadow);
  display: grid;
  gap: .75rem;
  overflow: hidden;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.exp-card::before{
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 5px;
  background: linear-gradient(
    90deg,
    color-mix(in srgb, var(--exp-tone) 86%, #ffffff 14%),
    color-mix(in srgb, var(--exp-tone) 60%, var(--exp-tone-2) 40%)
  );
}
.exp-card::after{
  content: "";
  position: absolute;
  right: -60px;
  bottom: -70px;
  width: 170px;
  height: 170px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--exp-tone) 12%, transparent);
  pointer-events: none;
}
.exp-card:hover{
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--exp-tone) 45%, var(--border));
  box-shadow: 0 14px 28px rgba(0,0,0,.14);
}
.exp-card--feature{
  grid-column: span 12;
}
.exp-card--compact{
  grid-column: span 4;
}
.exp-card--cmu{
  --exp-tone: #C41230;
  --exp-tone-2: #6D6E71;
}
.exp-card--google{
  --exp-tone: #4285F4;
  --exp-tone-2: #0F9D58;
}
.exp-card--google::before{
  background: linear-gradient(
    90deg,
    #4285F4 0 25%,
    #DB4437 25% 50%,
    #F4B400 50% 75%,
    #0F9D58 75% 100%
  );
}
.exp-card--apple{
  --exp-tone: #666a70;
  --exp-tone-2: #9ea3ab;
}
.exp-card--magicleap{
  --exp-tone: #F12742;
  --exp-tone-2: #F4B4C1;
}
.exp-card__head{
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .85rem;
  align-items: center;
}
.exp-card__mark{
  width: 2.65rem;
  height: 2.65rem;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: .24rem;
  background: color-mix(in srgb, var(--card) 92%, var(--exp-tone) 8%);
  border: 1px solid color-mix(in srgb, var(--exp-tone) 24%, var(--border));
  box-shadow: 0 9px 18px rgba(0,0,0,.16);
}
.exp-card__mark img{
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  border-radius: 8px;
}
.exp-card--feature .exp-card__mark{
  width: 3.15rem;
  height: 3.15rem;
  padding: .3rem;
}
.exp-card__meta{
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  column-gap: .5rem;
  row-gap: .35rem;
}
.exp-card__period{
  margin: 0;
  color: var(--muted);
  font-size: .78rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  font-weight: 700;
  min-width: 0;
}
.exp-card__badge{
  display: inline-flex;
  align-items: center;
  justify-self: end;
  white-space: nowrap;
  padding: .2rem .65rem;
  border-radius: 999px;
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--exp-tone) 88%, var(--text));
  background: color-mix(in srgb, var(--exp-tone) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--exp-tone) 26%, var(--border));
  font-weight: 700;
}
.exp-card h3{
  margin: 0;
  line-height: 1.25;
}
.exp-card__role{
  margin: 0;
  font-weight: 600;
  color: color-mix(in srgb, var(--text) 90%, var(--exp-tone) 10%);
}
.exp-points{
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .45rem;
}
.exp-points li{
  margin: 0;
  color: var(--muted);
  position: relative;
  padding-left: .95rem;
}
.exp-points li::before{
  content: "";
  position: absolute;
  left: 0;
  top: .56rem;
  width: .45rem;
  height: .45rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--exp-tone) 80%, #ffffff 20%);
}
.exp-card__chips{
  margin-top: .35rem;
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}
.exp-chip{
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: .2rem .58rem;
  font-size: .75rem;
  font-weight: 700;
  color: color-mix(in srgb, var(--exp-tone) 88%, var(--text));
  background: color-mix(in srgb, var(--exp-tone) 11%, transparent);
  border: 1px solid color-mix(in srgb, var(--exp-tone) 24%, var(--border));
}

.service-grid{
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  gap: 1.2rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.service-card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.service-card:hover{
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
  box-shadow: 0 12px 26px rgba(0,0,0,.12);
}
.service-card__header{
  display: flex;
  gap: .85rem;
  align-items: center;
  margin-bottom: .75rem;
}
.service-card__header h3{
  margin: 0;
}
.service-sub{
  margin: .2rem 0 0;
  color: var(--muted);
  font-size: .95rem;
}
.service-icon{
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, var(--bg-alt));
  border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--border));
  box-shadow: 0 8px 16px rgba(0,0,0,.08);
  flex: 0 0 auto;
}
.service-icon svg{
  width: 24px;
  height: 24px;
}
.service-list{
  margin: 0;
  padding-left: 1.1rem;
}
.service-list li{
  margin: .45rem 0;
}

.awards-grid{
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.award-item{
  position: relative;
  display: flex;
  gap: .9rem;
  align-items: flex-start;
  padding: 1rem;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.award-item::before{
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--accent), color-mix(in srgb, var(--accent) 40%, transparent));
}
.award-item:hover{
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  box-shadow: 0 12px 26px rgba(0,0,0,.12);
}
.award-item .award-icon{
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, var(--bg-alt));
  border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--border));
  flex: 0 0 auto;
  box-shadow: 0 8px 16px rgba(0,0,0,.08);
}
.award-item .award-icon svg{
  width: 26px;
  height: 26px;
}
.award-title{
  margin: 0;
  font-weight: 700;
}
.award-meta{
  margin: .35rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  align-items: center;
}
.award-year{
  display: inline-flex;
  align-items: center;
  padding: .15rem .55rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  color: var(--accent);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.award-detail{
  color: var(--muted);
  font-size: .95rem;
}

.pubs{
  max-width:var(--max);
  margin:0 auto;
  display:grid;
  gap:1rem;
}
.pub{
  display:grid;
  grid-template-columns: 220px 1fr;
  gap:1rem;
  align-items:stretch;
}
.pub--text{
  grid-template-columns: 1fr;
}
.pub--text .pub__media{
  display:none;
}
.pub__media img{
  width:100%;
  height:100%;
  max-height: 160px;
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-alt);
}
.pub__venue{ margin:.25rem 0 .5rem; color: var(--muted); }
.pub__footnote{
  margin: .1rem 0 .5rem;
  color: var(--muted);
  font-size: .95rem;
}
.pub__links a{ margin-right:.75rem; font-weight:700; }
.bibtex-link{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  font-weight:700;
  color: var(--accent);
}
.bibtex-icon{
  width:1rem;
  height:1rem;
  flex:0 0 auto;
  color: var(--accent);
}
.doi-link{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
}
.doi-icon{
  width:1rem;
  height:1rem;
  flex:0 0 auto;
  color: var(--accent);
}
.pdf-link{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
}
.pdf-icon{
  width:1rem;
  height:1rem;
  flex:0 0 auto;
  color: var(--accent);
}
.arxiv-link{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
}
.arxiv-icon{
  width:2.6rem;
  height:1.1rem;
  flex:0 0 auto;
  color: #b31b1b;
}
.pdf-link[aria-disabled="true"]{
  opacity:.6;
  pointer-events:none;
}
.pub__award{
  margin:.4rem 0 0;
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  font-weight:700;
  color: var(--accent-2);
}
.award-icon{
  width:1rem;
  height:1rem;
  flex:0 0 auto;
  color: currentColor;
}
.pub__note{ margin:.5rem 0 0; color: var(--muted); }

.project img{
  width:100%;
  height: 180px;
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid var(--border);
  margin-bottom:.75rem;
  background: var(--bg-alt);
}

.media-rail{
  max-width: var(--max);
  margin: 0 auto;
  position: relative;
  display: grid;
  gap: 1.5rem;
  padding-left: 1.25rem;
}
.media-rail::before{
  content: "";
  position: absolute;
  left: .2rem;
  top: .5rem;
  bottom: .5rem;
  width: 2px;
  background: color-mix(in srgb, var(--accent) 35%, var(--border));
}
.media-item{
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 1.4rem;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
}
.media-item__media{
  max-width: 360px;
  width: 100%;
  justify-self: start;
}
.media-item::before{
  content: "";
  position: absolute;
  left: -1.05rem;
  top: 1.4rem;
  width: .75rem;
  height: .75rem;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent);
}
.media-item__media img{
  width: 100%;
  height: 190px;
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-alt);
}
.media-item__body h3{
  margin: .3rem 0 .35rem;
}
.media-link-card{
  color: inherit;
  text-decoration: none;
}
.media-link-card:hover{
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}
.media-link-card:hover h3,
.media-link-card:focus-visible h3{
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.media-link-card:focus-visible{
  outline: 2px solid color-mix(in srgb, var(--accent) 60%, transparent);
  outline-offset: 2px;
}
.media-item__body p{
  margin: 0;
  color: var(--muted);
}
.media-type{
  display: inline-flex;
  align-items: center;
  padding: .2rem .6rem;
  border-radius: 999px;
  font-size: .75rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  font-weight: 700;
}
.media-item:nth-child(even){
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
}
.media-item:nth-child(even) .media-item__media{
  order: 2;
  justify-self: end;
}
.media-item:nth-child(even) .media-item__body{
  order: 1;
}

.note{ max-width: var(--max); margin: 1rem auto 0; }
.small{ font-size:.95rem; color: var(--muted); }

.footer{
  padding: 2rem 1rem 3rem;
  max-width: var(--max);
  margin: 0 auto;
  color: var(--muted);
}

/* Contact pills */
.contact-links{
  display: grid;
  gap: .7rem;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  margin-bottom: .75rem;
}
.contact-pill{
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  padding: .55rem .85rem;
  border-radius: 999px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  font: inherit;
  appearance: none;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.contact-feedback{
  margin-left: auto;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0;
  transform: translateY(2px);
  transition: opacity .2s ease, transform .2s ease;
}
.contact-pill.is-copied{
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
  background: color-mix(in srgb, var(--accent) 12%, var(--bg-alt));
}
.contact-pill.is-copied .contact-feedback{
  opacity: 1;
  transform: translateY(0);
}
.contact-pill:hover{
  transform: translateY(-1px);
  box-shadow: var(--shadow);
  background: color-mix(in srgb, var(--bg-alt) 80%, var(--accent) 20%);
}
.contact-icon{
  width: 34px;
  height: 34px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
  flex: 0 0 auto;
}
.contact-icon svg{
  width: 18px;
  height: 18px;
}

/* BibTeX modal */
.bibtex-modal{
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  z-index: 100;
}
.bibtex-modal[hidden]{ display: none; }
.bibtex-modal__backdrop{
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
}
.bibtex-modal__panel{
  position: relative;
  width: min(720px, 95vw);
  max-height: 85vh;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  display: grid;
  gap: 1rem;
  z-index: 1;
}
.bibtex-modal__header{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.bibtex-modal__content{
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: .9rem;
  max-height: 45vh;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: .9rem;
}
.bibtex-modal__actions{
  display: flex;
  gap: .75rem;
  justify-content: flex-end;
  flex-wrap: wrap;
}
.bibtex-modal__status{
  margin: 0;
  color: var(--muted);
  font-size: .95rem;
}
.icon-button{
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
 .icon-button svg{
  width: 1.1rem;
  height: 1.1rem;
}
.icon-button:hover{
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}
.icon-button--ghost{
  background: transparent;
  color: var(--muted);
}
.icon-button--solid{
  background: var(--accent);
  color: #fff;
  border-color: transparent;
}
body.modal-open{
  overflow: hidden;
}

/* Responsive */
@media (max-width: 900px){
  .hero{ grid-template-columns: 1fr; }
  .nav{ flex-wrap:wrap; gap:.65rem; }
  .brand{ margin-right:auto; }
  .nav__toggle{ display:inline-flex; }
  .nav.nav--enhanced .nav__links{
    display:none;
    margin-left:0;
    width:100%;
    flex-direction:column;
    align-items:stretch;
    gap:.2rem;
    padding:.5rem;
    border:1px solid var(--border);
    border-radius:12px;
    background:var(--card);
    box-shadow:var(--shadow);
  }
  .nav.nav--enhanced.is-open .nav__links{ display:flex; }
  .nav.nav--enhanced .nav__links a{ padding:.65rem .7rem; }
  .nav:not(.nav--enhanced) .nav__links{
    margin-left:0;
    width:100%;
  }
  .grid--3{ grid-template-columns: 1fr; }
  .grid--2{ grid-template-columns: 1fr; }
  .exp-card__head{
    grid-template-columns: 1fr;
    gap: .6rem;
  }
  .exp-card__mark{
    width: 2.5rem;
    height: 2.5rem;
  }
  .exp-card--feature{ grid-column: span 12; }
  .exp-card--compact{ grid-column: span 12; }
  .exp-card{
    padding: 1rem;
    gap: .65rem;
  }
  .pub{ grid-template-columns: 1fr; }
  .pub__media img{ max-height: 220px; }
  .media-rail{ padding-left: 0; }
  .media-rail::before{ display: none; }
  .media-item{ grid-template-columns: 1fr; }
  .media-item::before{ display: none; }
}

@media (max-width: 700px){
  .hero__figure{
    width: min(320px, 82vw);
    margin: 0 auto;
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    background: var(--bg-alt);
  }
  .hero__figure img{
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    object-position: center 8%;
    border: none;
    border-radius: 0;
    box-shadow: none;
    transform: scale(1.18);
    transform-origin: center top;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
}