:root{
  --bg:#0c0d10;
  --panel:#12141a;
  --text:#f1f2f4;
  --muted:#9aa0aa;
  --accent:#3dd6c6;
  --line:#1e222b;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}

body{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

/* ---------- HERO ---------- */

.hero{
  position: relative;
  height: 100vh;
  overflow: hidden;
}

/* rotating hero background (home page only) */
.hero.hero-rotating::before{
  /* disable the single-image pseudo background for the rotating variant */
  background: none;
  animation: none;
}

.hero-bg{
  position: absolute;
  inset: 0;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 900ms ease;
  will-change: opacity, transform;
  transform-origin: center;
  animation: bg-zoom 60s linear infinite alternate;
  animation-play-state: paused;
  z-index: 0;
}

.hero-bg.is-active{
  opacity: 1;
  animation-play-state: running;
}

/* smaller hero for sub-pages like People */
.hero.hero-small{
  height: 32vh;
}

.hero.hero-small::before{
  /* keep the same background image as the main hero but stop the slow zoom */
  background: url("assets/img/background.jpg") center / cover no-repeat;
  transform: scale(1);
  animation: none;
  z-index: 0;
}

.hero.hero-small::after{
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(rgba(12,13,16,0.7), rgba(12,13,16,0.6));
  z-index: 1;
}

.hero-subtitle{
  margin-top: -8px;
  color: var(--muted);
  font-size: 18px;
}

/* background image element (animated) */
.hero::before{
  content: "";
  position: absolute;
  inset: 0;
  background: url("assets/img/background.jpg") center / cover no-repeat;
  transform-origin: center;
  will-change: transform;
  animation: bg-zoom 60s linear infinite alternate;
  z-index: 0;
}

/* gradient overlay above the image */
.hero::after{
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(rgba(12,13,16,0.4), rgba(12,13,16,0.2));
  z-index: 1;
}

.hero-text{
  position: absolute;
  left: 60px;
  bottom: 80px;
  z-index: 2;
}


@keyframes bg-zoom{
  from{ transform: scale(1); }
  to{ transform: scale(1.8); }
}

.affiliation-logo{
  display: block;
  max-height: 90px;
  max-width: 260px;
  margin-bottom: 18px;
  opacity: 0.9;
}

/* People page layout */
.people-section{
  padding: 40px 0 80px;
}

.people-intro{
  color: var(--muted);
  max-width: 85ch;
  margin-bottom: 20px;
}

.people-grid{
  display: grid;
  grid-template-columns: repeat(2, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 18px;
}

@media (max-width: 900px){
  .people-grid{ grid-template-columns: 1fr; }
}

.person-card{
  background: rgba(18,20,26,0.6);
  border: 1px solid rgba(255,255,255,0.04);
  padding: 18px;
  border-radius: 12px;
  text-align: center;
}

.person-image img{
  width: 240px;
  max-width: 100%;
  aspect-ratio: 1 / 1;
  height: auto;
  object-fit: cover;
  border-radius: 50%;
  display: block;
  margin: 0 auto 12px;
  border: 2px solid rgba(255,255,255,0.04);
}

.person-name a{
  color: var(--text);
  text-decoration: none;
}

.person-title{
  color: var(--muted);
  font-size: 14px;
  margin: 8px 0 12px;
}

.person-description{
  color: #aeb6c2;
  font-size: 14px;
  line-height: 1.6;
  text-align: justify;
  text-justify: inter-word;
  hyphens: auto;
}

@media (max-width: 600px){
  .hero.hero-small{ height: 26vh; }
  .person-image img{ width: 170px; }
}

/* Publications page layout */
.publications-section{
  padding: 40px 0 80px;
}

.publications-intro{
  color: var(--muted);
  max-width: 85ch;
  margin-bottom: 18px;
}

.pub-actions{
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 10px 0 22px;
}

.pub-button{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(18,20,26,0.6);
  border: 1px solid rgba(255,255,255,0.06);
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
}

.pub-button:hover{
  border-color: rgba(61,214,198,0.45);
}

.publications-list{
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.publication-item{
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 16px;
  padding: 16px;
  border-radius: 12px;
  background: rgba(18,20,26,0.6);
  border: 1px solid rgba(255,255,255,0.04);
}

.pub-year{
  font-weight: 700;
  color: var(--text);
  opacity: 0.9;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: 10px;
  height: fit-content;
  padding: 8px 10px;
  text-align: center;
}

.pub-content h3{
  margin: 0;
  font-size: 18px;
  line-height: 1.35;
}

.pub-authors{
  margin: 8px 0 0;
  color: #aeb6c2;
  font-size: 14px;
}

.pub-venue{
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.pub-links{
  margin-top: 10px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.pub-links a{
  display: inline-block;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.08);
  text-decoration: none;
  color: var(--accent);
  font-size: 13px;
}

.pub-links a:hover{
  border-color: rgba(61,214,198,0.55);
}

.pub-empty{
  color: var(--muted);
  background: rgba(255,255,255,0.02);
  border: 1px dashed rgba(255,255,255,0.10);
  padding: 14px 16px;
  border-radius: 12px;
}

@media (max-width: 700px){
  .publication-item{ grid-template-columns: 1fr; }
  .pub-year{ width: fit-content; }
}

/* keep logos subtle */
.affiliation-card.mcqst .affiliation-logo{
  filter: brightness(1.1);
}

.affiliation-card.tum .affiliation-logo{
  filter: brightness(1.1);
}


.hero-text h1{
  margin: 0;
  font-size: 56px;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.hero-text p{
  margin-top: -20px;
  font-size: 30px;
  
}

.scroll-indicator{
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 40px;
  color: var(--muted);
  opacity: 0.8;
}

.hero-credit{
  position: absolute;
  right: 24px;
  bottom: 16px;
  z-index: 3;
  color: rgba(241,242,244,0.92);
  font-size: 13px;
  opacity: 0.95;
  background: rgba(0,0,0,0.28);
  padding: 6px 8px;
  border-radius: 6px;
}
/* ---------- NAV BAR ---------- */

.top-nav{
  position: sticky;
  top: 0;
  background: rgba(18,20,26,0.95);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
  display: none;
  z-index: 100;
}

.top-nav.visible{
  display: block;
}

.top-nav ul{
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  gap: 28px;
  list-style: none;
}

.top-nav a{
  color: var(--muted);
  text-decoration: none;
  font-size: 18px;
}

.top-nav a:hover{
  color: var(--accent);
}

/* Active nav link styling */
.top-nav a.active{
  color: var(--accent);
  font-weight: 600;
}
.top-nav a.active::after{
  content: "";
  display: block;
  height: 3px;
  width: 100%;
  background: var(--accent);
  margin-top: 6px;
  border-radius: 2px;
}

/* ---------- CONTENT ---------- */

.content{
  max-width: 1400px;
  margin: 0 auto;
  padding: 10px 20px;
}

.intro{
  margin-bottom: 0px;
}

.intro-main{
  font-size: 18px;
  max-width: 100%;
}

.intro-sub{
  margin-top: 20px;
  font-size: 18px;
  color: var(--muted);
  max-width: 100%;
}

/* Justify main body paragraphs for a cleaner column appearance */
.intro-main,
.intro-sub,
.people-intro,
.publications-intro,
.research-card p,
.research-column p,
.affiliation-card p {
  text-align: justify;
  text-justify: inter-word;
  -webkit-hyphens: auto;
  -ms-hyphens: auto;
  hyphens: auto;
}

.block{
  padding: 10px 0;
  border-top: 1px solid var(--line);
}

.block h2{
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 40px;
}

.section{
  scroll-margin-top: 90px;
}


/* ---------- FOOTER ---------- */

.site-footer{
  border-top: 1px solid var(--line);
  padding: 40px;
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}

/* ---------- MOBILE ---------- */

@media (max-width: 900px){
  .hero-text{
    left: 24px;
    bottom: 60px;
  }
  .hero-text h1{
    font-size: 40px;
  }
}


.affiliations{
  padding: 80px 20px 60px;
  background: linear-gradient(
    rgba(10,11,14,0.95),
    rgba(10,11,14,0.95)
  );
  border-top: 1px solid rgba(255,255,255,0.06);
}

.affiliation-grid{
  max-width: 980px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.affiliation-card h3{
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 12px;
  color: #ffffff;
}

.affiliation-line{
  width: 48px;
  height: 2px;
  margin-bottom: 18px;
  background: rgba(255,255,255,0.25);
}

.affiliation-card p{
  color: #aeb6c2;
  font-size: 15.5px;
  line-height: 1.7;
  margin: 0 0 16px;
}

.affiliation-card a{
  font-size: 14px;
  text-decoration: none;
  color: #7fd3c1;
}

.affiliation-card a:hover{
  text-decoration: underline;
}

/* subtle identity accents */
.affiliation-card.mcqst .affiliation-line{
  background: #7fd3c1;
}

.affiliation-card.tum .affiliation-line{
  background: #4fa3ff;
}

@media (max-width: 760px){
  .affiliation-grid{
    grid-template-columns: 1fr;
    gap: 36px;
  }
}


/* ---------- Research overview layout ---------- */

.research-overview{
  padding-top: 20px;
}

/* wide banner shown above research columns */
.research-banner{
  width: 100%;
  margin: 18px 0 28px;
  border-radius: 12px;
  overflow: hidden;
}
.research-banner img{
  width: 100%;
  height: 360px;
  object-fit: cover;
  display: block;
}

/* Cross-fade rotating banner (Research page) */
.research-banner.rotating{
  position: relative;
  height: 360px;
}

.research-banner.rotating img{
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 800ms ease;
}

.research-banner.rotating img.is-active{
  opacity: 1;
}

@media (max-width: 700px){
  .research-banner.rotating{ height: 260px; }
}

/* Standalone research page: three-column cards matching main page structure */
.research-grid{
  display: grid;
  grid-template-columns: repeat(3, minmax(320px, 1fr));
  gap: 28px;
  margin-top: 28px;
  align-items: start;
}

.research-card{
  background: rgba(18,20,26,0.03);
  border: 1px solid rgba(255,255,255,0.03);
  padding: 12px;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
}

/* Make research cards visually consistent */
.research-overview .research-figure{
  height: 210px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.research-overview .research-figure img{
  height: 100%;
  max-height: none;
  object-fit: contain;
}

.research-figure img{
  width: 100%;
  height: auto;
  max-height: 340px;
  object-fit: contain;
  border-radius: 8px;
  display: block;
  margin-bottom: 12px;
}

/* Two images side-by-side (e.g., hBN + BNNT) */
.research-figure.two-up{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 12px;
}

.research-figure.two-up img{
  margin-bottom: 0;
  height: 210px;
  max-height: none;
  width: 100%;
  object-fit: contain;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.04);
}

@media (max-width: 520px){
  .research-figure.two-up{ grid-template-columns: 1fr; }
  .research-figure.two-up img{ height: 260px; }
}

.research-card h3{
  margin: 0 0 8px 0;
  font-size: 20px;
  line-height: 1.25;
}

.research-card p{
  margin: 0;
  color: var(--muted);
  flex: 1;
}

@media (max-width: 1200px){
  .research-grid{ grid-template-columns: repeat(2, minmax(320px, 1fr)); gap: 22px; }
}

@media (max-width: 900px){
  .research-grid{ grid-template-columns: 1fr; gap: 28px; }
}

.research-columns{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 56px;
  margin-top: 20px;
}

.research-column h3{
  margin: 0;
  font-size: 20px;
  font-weight: 600;
  color: #bfc6d1;
}

.research-column-figure{
  margin: 14px 0 18px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: 10px;
  overflow: hidden;
}

.research-column-figure img{
  width: 100%;
  height: 160px;
  object-fit: contain;
  display: block;
  background: rgba(255,255,255,0.02);
}

.research-line{
  width: 60px;
  height: 3px;
  background: var(--accent);
  margin: 18px 0 24px;
}

.research-column p{
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- NEWS CAROUSEL ---------- */
.news-section{
  margin-bottom: 8px; /* reduce space before the next section */
}

.news-section h2{
  margin: 0;
}

.news-section .news-carousel{
  margin-top: 22px;
}
.news-container{
  position: relative;
  min-height: 0; /* let the active slide define height */
}
.news-item{
  position: absolute;
  inset: 0 0 0 0;
  display: flex;
  gap: 26px;
  align-items: center;
  padding: 26px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 420ms ease, transform 420ms ease;
  background: linear-gradient(180deg, rgba(255,255,255,0.01), rgba(0,0,0,0));
  border-radius: 10px;
  pointer-events: none; /* prevent invisible slides from blocking clicks */
  z-index: 0;
}
.news-item.active{
  opacity: 1;
  transform: translateY(0);
  position: relative;
  pointer-events: auto;
  z-index: 1;
}
.news-figure img{
  width: 460px;
  height: 280px;
  object-fit: cover;
  border-radius: 10px;
  display: block;
}
.news-figure a{
  display: block;
}
.news-figure a:hover img{
  box-shadow: 0 0 0 1px rgba(61,214,198,0.28);
}
.news-figure--contain img{
  object-fit: contain;
  background: rgba(255,255,255,0.06);
  padding: 10px;
}
.news-content{
  max-width: calc(100% - 520px); /* allow for larger figure + gap */
}
.news-content h3{
  margin: 0 0 8px 0;
  font-size: 22px;
}
.news-content h3 a{
  color: var(--text);
  text-decoration: none;
}
.news-content h3 a:hover{
  color: var(--accent);
}
.news-content p{ margin: 0 0 10px 0; color: var(--muted); }
.news-date{ font-size: 13px; color: var(--muted); }
.news-dots{
  margin-top: 14px;
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-bottom: 2px;
}
.dot{
  width: 12px;
  height: 12px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
  display: inline-block;
  cursor: pointer;
}
.dot.active{ background: var(--accent); box-shadow: 0 0 8px rgba(61,214,198,0.18); }

/* ---------- Mobile ---------- */

@media (max-width: 900px){
  .research-columns{
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .research-column h3{
    font-size: 22px;
  }

  .news-item{
    flex-direction: column;
    align-items: flex-start;
  }

  .news-figure img{
    width: min(720px, 100%);
    height: 320px;
  }

  .news-content{
    max-width: 100%;
  }

  .news-container{ min-height: 0; }
}

/* Keep the section that follows News tight */
#openings.section{
  padding-top: 6px;
}

#openings.section h2{
  margin-top: 0;
}

/* ---------- PAGE BOTTOM (three columns) ---------- */
.page-bottom{
  padding: 28px 20px 18px;
  border-top: 1px solid rgba(255,255,255,0.04);
}
.page-bottom-grid{
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: start;
}
.page-bottom h4{
  margin: 0 0 8px 0;
  font-size: 14px;
  color: var(--text);
}
.page-bottom p,
.page-bottom a{
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 8px 0;
  text-decoration: none;
}
.page-bottom a:hover{ color: var(--accent); }

@media (max-width: 900px){
  .page-bottom-grid{ grid-template-columns: 1fr; gap: 18px; }
}