/* ================================================================
   qcg.css  —  Quantum Circuit Group  —  redesign 2026
   Deep-space scientific aesthetic
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=DM+Mono:ital,wght@0,400;0,500;1,400&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,300;1,9..40,400&display=swap');

/* ── Variables ───────────────────────────────────────────────── */
:root {
  --bg:        #080810;
  --bg2:       #0e0e1a;
  --bg3:       #131320;
  --surface:   #181828;
  --surface2:  #1e1e30;
  --border:    rgba(193,249,28,.12);
  --border2:   rgba(255,255,255,.07);
  --accent:    #c1f91c;
  --accent2:   #1cf9c3;
  --accent3:   #1cc1f9;
  --danger:    #e74c3c;
  --text:      #d8d8e8;
  --muted:     #6868a0;
  --muted2:    #9090b8;
  --white:     #f0f0f8;
  --nav-h:     56px;
  --max-w:     820px;
  --r:         6px;
  --r2:        12px;
  --fh:        'Outfit', sans-serif;
  --fb:        'DM Sans', sans-serif;
  --fm:        'DM Mono', monospace;
  --ease:      cubic-bezier(.4,0,.2,1);
}

/* ── Reset ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--fb);
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent2); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--accent); }
p { margin-bottom: .9rem; }
p:last-child { margin-bottom: 0; }
strong, b { color: var(--white); font-weight: 500; }

/* ── Navbar ──────────────────────────────────────────────────── */
#qcg-nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  padding: 0 1.25rem;
  gap: .5rem;
  background: rgba(8,8,16,.82);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--fh);
  font-weight: 700;
  font-size: .85rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  white-space: nowrap;
  margin-right: .5rem;
}
.nav-logo:hover { color: var(--white); }

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0;
  flex-shrink: 0;
}
.nav-links li { position: relative; }
.nav-links li.drop-trigger { white-space: nowrap; flex-shrink: 0; }
.nav-links a {
  display: block;
  padding: .38rem .65rem;
  font-family: var(--fh);
  font-size: .73rem;
  font-weight: 500;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--muted);
  border-radius: 4px;
  transition: color .2s, background .2s;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--white);
  background: rgba(255,255,255,.06);
}
.nav-links .drop-trigger > a::after {
  content: ' ▾';
  font-size: .6rem;
  opacity: .5;
  vertical-align: middle;
}
.nav-drop {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 195px;
  background: rgba(14,14,26,.97);
  border: 1px solid var(--border);
  border-radius: var(--r2);
  padding: .35rem 0;
  box-shadow: 0 20px 50px rgba(0,0,0,.7);
}

.nav-drop {
  display: block;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 195px;
  background: rgba(14,14,26,.97);
  border: 1px solid var(--border);
  border-radius: var(--r2);
  padding: .35rem 0;
  box-shadow: 0 20px 50px rgba(0,0,0,.7);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s ease, visibility 0.15s ease;
}

.drop-trigger:hover .nav-drop,
.nav-drop:hover {
  opacity: 1;
  visibility: visible;
  transition-delay: 0s;
}

.nav-links li:not(:hover) .nav-drop {
  transition-delay: 0.3s;
}

.nav-drop a {
  padding: .42rem 1rem;
  font-size: .72rem;
  color: var(--muted2);
  border-radius: 0;
  background: transparent;
  letter-spacing: .05em;
}
.nav-drop a:hover { color: var(--accent); background: rgba(193,249,28,.06); }

.nav-sep { width: 1px; height: 16px; background: var(--border2); flex-shrink: 0; margin: 0 .25rem; }

.nav-lang-en { color: var(--accent) !important; font-weight: 700 !important; }
.nav-lang-fr { color: var(--danger) !important; }
.nav-lang-fr:hover { color: #ff7060 !important; }

.nav-ext a {
  font-size: .68rem;
  letter-spacing: .05em;
  color: rgba(100,100,150,.65) !important;
}
.nav-ext a:hover { color: var(--muted) !important; }

/* Burger */
.nav-burger {
  display: none;
  margin-left: auto;
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: .3rem .45rem;
  cursor: pointer;
  color: var(--text);
  font-size: 1rem;
  line-height: 1;
  flex-shrink: 0;
}
.nav-burger:hover { border-color: var(--accent); color: var(--accent); }

/* Mobile panel */
#nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-h);
  inset-inline: 0;
  background: rgba(8,8,16,.97);
  border-bottom: 1px solid var(--border);
  padding: .75rem 1.25rem 1.25rem;
  z-index: 999;
}
#nav-mobile.open { display: block; }
#nav-mobile a {
  display: block;
  padding: .58rem 0;
  font-family: var(--fh);
  font-size: .88rem;
  font-weight: 500;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--muted2);
  border-bottom: 1px solid rgba(255,255,255,.04);
}
#nav-mobile a:hover { color: var(--accent); }
#nav-mobile a:last-child { border-bottom: none; }

@media (max-width: 860px) {
  .nav-links, .nav-sep, .nav-ext { display: none; }
  .nav-burger { display: block; }
  .nav-logo { flex: 1; }
}

/* ── Page wrapper ────────────────────────────────────────────── */
.page { margin-top: var(--nav-h); }

/* ── Banner image ────────────────────────────────────────────── */
.banner {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
  object-position: center 30%;
  display: block;
  opacity: .75;
}
.strip {
  width: 100%;
  max-height: 250px;
  object-fit: cover;
  object-position: center top;
  display: block;
  opacity: .55;
}

/* ── Sections ────────────────────────────────────────────────── */
.sec {
  padding: 4.5rem 1.5rem;
}
.sec-dark  { background: var(--bg); }
.sec-dark2 { background: var(--bg2); }
.sec-dark3 { background: var(--bg3); }
.sec-light {
  background: #f0f2ec;
  color: #181820;
}
.sec-light h2, .sec-light h3, .sec-light h4,
.sec-light .sec-title, .sec-light strong, .sec-light b { color: #181820; }
.sec-light p, .sec-light li { color: #333340; }
.sec-light a { color: #1a6a38; }
.sec-light a:hover { color: #0d4a26; }
.sec-light .sec-title::after { background: #2c8040; }
.sec-light .label { color: #2c8040; }

.container { max-width: var(--max-w); margin: 0 auto; }

/* ── Titles ──────────────────────────────────────────────────── */
.sec-title {
  font-family: var(--fh);
  font-size: clamp(1.1rem, 2.5vw, 1.6rem);
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  text-align: center;
  color: var(--white);
  margin-bottom: 2.8rem;
}
.sec-title::after {
  content: '';
  display: block;
  width: 2.5rem;
  height: 2px;
  background: var(--accent);
  margin: .55rem auto 0;
  border-radius: 1px;
}
.sec-subtitle {
  font-family: var(--fh);
  font-size: clamp(.95rem, 2vw, 1.2rem);
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  text-align: center;
  color: var(--white);
  margin: 2.5rem 0 1.5rem;
}
.label {
  font-family: var(--fm);
  font-size: 1.1rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: .4rem;
}

/* ── Intro ───────────────────────────────────────────────────── */
.intro-text {
  text-align: justify;
  font-size: 1rem;
  line-height: 1.82;
  color: rgba(216,216,232,.85);
  max-width: 680px;
  margin: 0 auto 1.5rem;
}
.group-photo {
  width: 100%;
  border-radius: var(--r2);
  border: 1px solid var(--border);
  margin: 1.5rem 0;
}

/* ── Logos bar ───────────────────────────────────────────────── */
.logos-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 4.2rem 2rem;
  margin: 2rem 0;
  padding: 1.4rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--r2);
  background: rgba(255,255,255,.02);
}
.logos-bar img {
  height: 60px;
  width: auto;
  object-fit: contain;
  filter: brightness(.8) grayscale(.15);
  opacity: .99;
  transition: opacity .2s, filter .2s;
}
.logos-bar a:hover img { opacity: 1; filter: none; }

/* ── Fridges ─────────────────────────────────────────────────── */
.fridges {
  display: grid;
  /* grid-template-columns set dynamically by JS */
  justify-content: center;
  gap: .6rem;
  margin: 2rem 0 0;
}
.fridges iframe {
  border-radius: var(--r);
  border: 1px solid var(--border);
  display: block;
}

/* ── Slideshow override ──────────────────────────────────────── */
.bss-slides {
  background: var(--bg2) !important;
  border: 1px solid var(--border);
  border-radius: var(--r2);
  overflow: hidden;
  max-width: var(--max-w);
  margin: 0 auto;
}
.bss-slides figcaption {
  font-family: var(--fm) !important;
  font-size: .7rem !important;
  background: rgba(0,0,0,.65) !important;
  border-radius: 3px !important;
  color: var(--muted2) !important;
}

/* ── Faculty ─────────────────────────────────────────────────── */
.faculty-card {
  overflow: hidden;
  padding-bottom: 2.8rem;
  margin-bottom: 2.8rem;
  border-bottom: 1px solid var(--border);
}
.faculty-card:last-child { border-bottom: none; padding-bottom: 0; margin-bottom: 0; }
.faculty-card img {
  float: right;
  height: 220px;
  width: auto;
  max-width: 45%;
  margin: 0 0 1rem 1.5rem;
  border-radius: var(--r2);
  border: 1px solid var(--border);
  object-fit: cover;
  object-position: center 35%;
}
.faculty-name {
  font-family: var(--fh);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: .5rem;
}
@media (max-width: 560px) {
  .faculty-card img { float: none; max-width: 100%; width: 100%; margin: 0 0 1rem 0; height: 200px; }
}

/* ── Students grid ───────────────────────────────────────────── */
.students-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(215px, 1fr));
  gap: 1.1rem;
}
.s-card {
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--r2);
  overflow: hidden;
  transition: transform .22s var(--ease), border-color .22s, box-shadow .22s;
}
.s-card:hover {
  transform: translateY(-5px);
  border-color: rgba(193,249,28,.3);
  box-shadow: 0 10px 36px rgba(193,249,28,.07);
}
.s-card img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  object-position: center 20%;
  display: block;
}
.s-card-body { padding: .85rem 1rem 1rem; }
.s-name {
  font-family: var(--fh);
  font-size: .93rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: .15rem;
}
.s-role {
  font-family: var(--fm);
  font-size: .7rem;
  color: var(--accent);
  margin-bottom: .5rem;
  letter-spacing: .04em;
}
.s-bio { font-size: .8rem; color: var(--muted2); line-height: 1.6; margin: 0; }
.s-bio a { color: var(--accent2); }
.s-bio a:hover { color: var(--accent); }

/* ── Quantic grid ────────────────────────────────────────────── */
.quantic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1.2rem 1rem;
  text-align: center;
}
.q-card img {
  width: 76px; height: 76px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 20%;
  border: 2px solid var(--border);
  margin: 0 auto .55rem;
  transition: border-color .2s;
}
.q-card:hover img { border-color: var(--accent); }
.q-card a { font-size: .78rem; color: var(--muted2); font-family: var(--fh); font-weight: 500; }
.q-card a:hover { color: var(--accent); }

/* ── Alumni ──────────────────────────────────────────────────── */
.alumni-row {
  display: flex;
  gap: .85rem;
  align-items: flex-start;
  padding: .65rem 0;
  border-bottom: 1px solid rgba(255,255,255,.04);
}
.alumni-row:last-child { border-bottom: none; }
.alumni-row img {
  width: 40px; height: 40px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 20%;
  border: 1px solid var(--border);
  flex-shrink: 0;
  margin-top: .1rem;
}
.alumni-name {
  font-family: var(--fh);
  font-size: .9rem;
  font-weight: 500;
  color: var(--white);
  margin-bottom: .1rem;
}
.alumni-bio { font-size: .82rem; color: var(--muted2); margin: 0; }
.alumni-bio a { color: var(--accent2); }
.alumni-bio a:hover { color: var(--accent); }

/* ── Interns ─────────────────────────────────────────────────── */
.interns-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}
.interns-grid p {
  font-size: .8rem;
  color: var(--muted2);
  margin: 0;
  padding: .2rem 0;
  border-bottom: 1px solid rgba(255,255,255,.03);
}
@media (max-width: 500px) { .interns-grid { grid-template-columns: 1fr 1fr; } }

/* ── Publications ────────────────────────────────────────────── */
.pub-row {
  display: flex;
  gap: .9rem;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(255,255,255,.05);
  align-items: flex-start;
}
.pub-row:last-child { border-bottom: none; }
.pub-icon {
  color: var(--accent);
  font-size: .95rem;
  flex-shrink: 0;
  width: 1.1rem;
  text-align: center;
  margin-top: .25rem;
}
.pub-icon.beat { animation: heartbeat 1.6s ease-in-out infinite; }
@keyframes heartbeat { 0%,100%{transform:scale(1)} 50%{transform:scale(1.25)} }
.pub-text { font-size: .88rem; line-height: 1.65; color: var(--text); }
.pub-text a:first-child { color: var(--white); font-weight: 500; }
.pub-text a:first-child:hover { color: var(--accent); }
.pub-img {
  display: block;
  margin: .9rem auto;
  max-width: 55%;
  border-radius: var(--r);
  border: 1px solid var(--border);
}
@media (max-width: 540px) { .pub-img { max-width: 88%; } }

.thesis-row {
  display: flex;
  gap: .9rem;
  padding: .75rem 0;
  border-bottom: 1px solid rgba(255,255,255,.05);
  align-items: flex-start;
}
.thesis-row:last-child { border-bottom: none; }
.thesis-icon { color: var(--accent2); font-size: .95rem; flex-shrink: 0; width: 1.1rem; text-align: center; margin-top: .2rem; }
.thesis-text { font-size: .86rem; color: var(--text); }
.thesis-text a { color: var(--white); font-weight: 500; }
.thesis-text a:hover { color: var(--accent); }
.thesis-meta { color: var(--muted2); font-size: .8rem; }

/* ── Contact ─────────────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}
@media (max-width: 640px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-line {
  display: flex;
  gap: .8rem;
  align-items: flex-start;
  font-size: .93rem;
  margin-bottom: .8rem;
  color: var(--text);
}
.contact-line i { color: var(--accent); width: 1.1rem; text-align: center; flex-shrink: 0; margin-top: .2rem; font-style: normal; }
.contact-map img { width: 100%; border-radius: var(--r2); border: 1px solid var(--border); }

.video-wrap {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--r2);
  border: 1px solid var(--border);
  margin-top: 1rem;
}
.video-wrap iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: none; }

/* Events / links / projects */
.event-row {
  display: flex;
  gap: .75rem;
  padding: .55rem 0;
  border-bottom: 1px solid rgba(255,255,255,.04);
  font-size: .88rem;
}
.event-row:last-child { border-bottom: none; }
.event-row i { color: var(--accent); width: 1.1rem; text-align: center; flex-shrink: 0; font-style: normal; margin-top: .2rem; }
.event-row a { color: var(--text); font-weight: 500; }
.event-row a:hover { color: var(--accent); }

.project-card {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: .9rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r2);
  background: var(--surface);
  margin-bottom: .75rem;
  transition: border-color .2s;
}
.project-card:hover { border-color: rgba(193,249,28,.28); }
.project-card img { height: 36px; width: auto; max-width: 80px; object-fit: contain; flex-shrink: 0; filter: brightness(.9); }
.project-card p { font-size: .86rem; color: var(--muted2); margin: 0; }
.project-card a { color: var(--white); font-weight: 500; }
.project-card a:hover { color: var(--accent); }

.links-list { display: flex; flex-direction: column; gap: .45rem; }
.links-list a { font-size: .88rem; color: var(--muted2); }
.links-list a:hover { color: var(--accent); }

/* ── Publications ────────────────────────────────────────────── */
.pub-container { max-width: 820px; }

.pub-section-title {
  font-family: var(--fh);
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: .08em;
  text-transform: uppercase;
  margin: 0 0 1.5rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--border);
}

.pub-entry {
  display: flex;
  gap: .9rem;
  padding: .75rem 0;
  border-bottom: 1px solid rgba(255,255,255,.04);
  font-size: .88rem;
  line-height: 1.6;
  align-items: flex-start;
}
.pub-entry:last-child { border-bottom: none; }
.pub-entry > i {
  color: var(--accent);
  width: 1.1rem;
  text-align: center;
  flex-shrink: 0;
  margin-top: .22rem;
}
.pub-entry > div a { color: var(--accent2); font-weight: 500; }
.pub-entry > div a:hover { color: var(--accent); }
.pub-entry > div b { color: var(--muted2); font-weight: 600; }

/* Publication images — white background for figures with light content */
.pub-img-wrap {
  text-align: center;
  margin: 1rem 0 .5rem;
  background: #fff;
  border-radius: var(--r2);
  padding: .75rem;
  display: inline-block;
  width: 100%;
  box-sizing: border-box;
}
.pub-img-wrap img {
  max-width: 100%;
  height: auto;
  display: inline-block;
  vertical-align: middle;
}
.pub-img-wrap video {
  max-width: 100%;
  border-radius: var(--r2);
}

/* ── Contact page ────────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  margin-top: 2rem;
}
@media (max-width: 640px) {
  .contact-grid { grid-template-columns: 1fr; }
}
.contact-info p {
  display: flex;
  gap: .7rem;
  align-items: flex-start;
  font-size: .92rem;
  color: var(--text);
  margin-bottom: .7rem;
}
.contact-info p i {
  color: var(--accent);
  width: 1.1rem;
  text-align: center;
  flex-shrink: 0;
  margin-top: .22rem;
}
.contact-info a { color: var(--accent2); }
.contact-info a:hover { color: var(--accent); }

/* Projects grid */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
  margin-top: 1rem;
}
@media (max-width: 640px) {
  .projects-grid { grid-template-columns: 1fr; }
}
.projects-grid .project-card {
  display: flex;
  gap: .9rem;
  align-items: center;
  padding: .9rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--r2);
  background: var(--surface);
  transition: border-color .2s;
  text-decoration: none;
}
.projects-grid .project-card:hover { border-color: rgba(193,249,28,.28); }
.projects-grid .project-card img { height: 72px; width: auto; max-width: 72px; object-fit: contain; flex-shrink: 0; filter: brightness(.85); }
.projects-grid .project-card span { font-size: .82rem; color: var(--muted2); line-height: 1.5; }
.projects-grid .project-card span a { color: var(--accent2); font-weight: 500; }
.projects-grid .project-card span a:hover { color: var(--accent); }

/* ── Footer ──────────────────────────────────────────────────── */
.qcg-footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  font-family: var(--fh);
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--muted);
}
.qcg-footer a { color: rgba(193,249,28,.5); }
.qcg-footer a:hover { color: var(--accent); }
.footer-links {
  margin-top: .6rem;
  display: flex;
  justify-content: center;
  gap: 1.2rem;
  flex-wrap: wrap;
}

/* ── Recruitment chip ────────────────────────────────────────── */
.recruit-chip {
  display: inline-block;
  background: rgba(193,249,28,.1);
  border: 1px solid rgba(193,249,28,.3);
  color: var(--accent);
  font-family: var(--fm);
  font-size: .75rem;
  letter-spacing: .06em;
  padding: .35rem .9rem;
  border-radius: 99px;
  margin-top: 1.2rem;
}

/* ── Fade-in ─────────────────────────────────────────────────── */
.fade {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.fade.on { opacity: 1; transform: none; }