@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Playfair+Display:wght@500;600;700&display=swap');

:root{
  --bg:#07080d;
  --bg-soft:#0b0c13;
  --surface:#10121a;
  --surface-2:#141620;
  --surface-3:#191b27;
  --text:#f7f5fb;
  --muted:#aaa8b8;
  --muted-2:#7e7b8d;
  --line:rgba(255,255,255,.095);
  --line-strong:rgba(184,120,255,.30);
  --purple:#b878ff;
  --purple-2:#8d55e8;
  --max:1180px;
  --radius:18px;
  --shadow:0 18px 55px rgba(0,0,0,.22);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:"DM Sans",sans-serif;line-height:1.65;overflow-x:hidden}
body::selection{background:rgba(184,120,255,.28);color:#fff}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit}
button{cursor:pointer}

.container{width:min(92%,var(--max));margin:0 auto}

/* NAVIGATION */
.nav,.site-header{position:sticky;top:0;z-index:1000;background:rgba(7,8,13,.90);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.nav-inner{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;min-width:245px;font-weight:700}
.brand img{width:42px;height:42px;object-fit:contain;border-radius:9px;flex:0 0 auto}
.brand span{font-size:10.5px;line-height:1.28;letter-spacing:.075em;color:#f5f2fa}
.navlinks{display:flex;align-items:center;justify-content:flex-end;gap:18px;flex-wrap:nowrap}
.navlinks a{position:relative;color:var(--muted);font-size:13px;font-weight:500;padding:9px 0;white-space:nowrap;transition:color .2s ease,transform .2s ease}
.navlinks a:hover{color:var(--text)}
.navlinks a:not(.btn)::after{content:"";position:absolute;left:0;bottom:2px;width:0;height:2px;border-radius:99px;background:var(--purple);transition:width .22s ease}
.navlinks a:not(.btn):hover::after,.navlinks a:not(.btn).active::after{width:100%}
.navlinks a.active{color:var(--text)}
.menu{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:11px;background:var(--surface);color:var(--text);font-size:20px;align-items:center;justify-content:center}

/* TYPOGRAPHY */
h1,h2,h3,h4{color:var(--text);line-height:1.15}
h1,h2{font-family:"Playfair Display",serif}
h1{font-size:clamp(42px,6vw,74px);letter-spacing:-.035em}
h2{font-size:clamp(30px,4vw,46px);letter-spacing:-.025em}
h3{font-size:20px}
p{color:var(--muted)}
.lead{max-width:760px;font-size:17px;line-height:1.8}
.eyebrow{color:var(--purple);font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;margin-bottom:13px}
.breadcrumb{color:var(--muted-2);font-size:12px;margin-bottom:18px}

/* HERO */
.hero{min-height:78vh;display:flex;align-items:center;padding:105px 0;position:relative;background:radial-gradient(circle at 80% 15%,rgba(184,120,255,.14),transparent 30%),radial-gradient(circle at 12% 78%,rgba(91,62,180,.10),transparent 28%)}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(rgba(255,255,255,.018) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.018) 1px,transparent 1px);background-size:64px 64px;mask-image:linear-gradient(to bottom,#000,transparent 90%)}
.hero>.container{position:relative;z-index:1}
.hero h1{max-width:900px;margin-bottom:24px}
.hero h1 span{color:var(--purple)!important}
.hero-actions{display:flex;flex-wrap:wrap;gap:11px;margin-top:28px}
.meta{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;max-width:850px;margin-top:52px;padding-top:23px;border-top:1px solid var(--line)}
.meta div{font-size:13px;color:var(--muted)}
.meta strong{display:block;color:var(--text);font-size:10px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:4px}
.page-hero{padding:92px 0 64px;border-bottom:1px solid var(--line);background:radial-gradient(circle at 78% 15%,rgba(125,60,255,.12),transparent 33%)}
.page-hero h1{margin-bottom:16px}
.page-hero> .container>p:not(.eyebrow):not(.lead){max-width:720px;font-size:17px}

/* SECTIONS */
.section{padding:82px 0}
.section.alt,.section-alt{background:var(--surface)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:35px;margin-bottom:38px}
.section-head>div{max-width:720px}
.section-head>p{max-width:430px;font-size:14px}
.section-head h2{margin-bottom:9px}
.section-heading{max-width:760px;margin-bottom:38px}
.section-heading h2{margin-bottom:12px}
.section-heading>p:not(.eyebrow){max-width:700px}
.section-subheading{margin:42px 0 19px}
.section-subheading h3{font-size:23px}

/* GRIDS */
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.research-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.people-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}

/* CARDS */
.card,.person-card,.publication-card,.research-card{background:linear-gradient(180deg,rgba(255,255,255,.018),rgba(255,255,255,.006)),var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:27px;transition:transform .24s ease,border-color .24s ease,background .24s ease,box-shadow .24s ease}
.card:hover,.person-card:hover,.publication-card:hover,.research-card:hover{transform:translateY(-4px);border-color:var(--line-strong);background:var(--surface-2);box-shadow:var(--shadow)}
.card h3,.person-card h3,.publication-card h3,.research-card h3{margin-bottom:9px}
.card p,.person-card p,.publication-card p,.research-card p{font-size:14px}
.research-card{display:block}
.research-card .icon{width:42px;height:42px;display:flex;align-items:center;justify-content:center;margin-bottom:20px;border-radius:11px;background:rgba(184,120,255,.10);color:var(--purple);font-size:12px;font-weight:700}
.role{color:var(--purple);font-size:10px;font-weight:700;letter-spacing:.11em;text-transform:uppercase;margin-bottom:11px}
.num{color:var(--purple);font-size:12px;font-weight:700;letter-spacing:.12em;margin-bottom:15px}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:43px;padding:10px 18px;border:1px solid var(--line);border-radius:999px;background:transparent;color:var(--text);font-size:13px;font-weight:600;transition:transform .2s ease,background .2s ease,border-color .2s ease,opacity .2s ease}
.btn:hover{transform:translateY(-2px);border-color:var(--line-strong)}
.btn.primary{background:var(--purple);border-color:var(--purple);color:#09070d}
.btn.primary:hover{opacity:.9}
.btn.secondary{background:transparent}
.btn:disabled,.btn.disabled{cursor:not-allowed;pointer-events:none;transform:none !important;opacity:.65}
.btn.btn-closed{background:rgba(239,68,68,.12);color:#fca5a5;border-color:rgba(239,68,68,.35)}
.btn.btn-closed:hover{transform:none;opacity:.65;border-color:rgba(239,68,68,.35)}
.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:23px}

/* ROADMAP */
.roadmap{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));margin-top:38px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.step{min-height:112px;padding:19px;display:flex;flex-direction:column;justify-content:center;gap:7px;background:var(--surface);border-right:1px solid var(--line)}
.step:last-child{border-right:none}.step small{color:var(--purple);font-size:11px;font-weight:700}.step span{font-size:13px;font-weight:600;color:var(--text)}

/* EVENTS */
.featured-event{padding:38px;border-radius:24px;border:1px solid rgba(184,120,255,.24);background:linear-gradient(135deg,rgba(184,120,255,.10),rgba(125,60,255,.025));box-shadow:var(--shadow)}
.featured-event h2{margin:13px 0}.featured-event p{max-width:720px}.event-status{display:inline-block;padding:5px 10px;border-radius:999px;background:rgba(184,120,255,.11);color:var(--purple);font-size:10px;font-weight:700;letter-spacing:.1em}.event-meta{font-size:13px;color:var(--muted);margin:7px 0 12px}
.step-number{display:inline-flex;width:33px;height:33px;align-items:center;justify-content:center;margin-bottom:16px;border-radius:50%;background:rgba(184,120,255,.11);color:var(--purple);font-size:12px;font-weight:700}
.timeline{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.timeline-item{min-height:105px;padding:22px;background:var(--surface);border-right:1px solid var(--line);display:flex;flex-direction:column;justify-content:center;gap:5px}.timeline-item:last-child{border-right:none}.timeline-item strong{color:var(--purple);font-size:15px}.timeline-item span{color:var(--muted);font-size:13px}

/* PEOPLE */
.team-card{display:flex;flex-direction:column;gap:7px}.team-card h3{margin-bottom:3px}.team-details{color:var(--muted);font-size:13px}

/* LIST */
.list{display:grid;gap:11px;margin-top:18px;padding:0;list-style:none}.list li{position:relative;color:var(--muted);padding-left:21px;font-size:14px}.list li::before{content:"•";position:absolute;left:0;color:var(--purple)}

/* CTA */
.cta{padding:64px 38px;text-align:center;border:1px solid var(--line);border-radius:25px;background:radial-gradient(circle at center,rgba(125,60,255,.13),transparent 58%)}.cta-content{max-width:720px;margin:0 auto}.cta h2{margin-bottom:14px}.cta .lead{margin:0 auto}

/* FORMS */
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px}.form-group{display:flex;flex-direction:column;gap:7px}.form-group.full{grid-column:1/-1}.form-group label{font-size:13px;font-weight:600}.form-group input,.form-group textarea,.form-group select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:11px;background:var(--surface);color:var(--text);outline:none}.form-group input::placeholder,.form-group textarea::placeholder{color:var(--muted-2)}.form-group input:focus,.form-group textarea:focus,.form-group select:focus{border-color:var(--purple)}.form-group textarea{min-height:145px;resize:vertical}.form-note{margin-top:10px;font-size:12px}

/* RESOURCES / EMPTY STATES */
.resource-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:19px}.empty{padding:25px;border:1px dashed rgba(184,120,255,.25);border-radius:16px;background:rgba(184,120,255,.035);color:var(--muted);font-size:14px}

/* FOOTER */
footer,.site-footer{padding:43px 0;border-top:1px solid var(--line);background:#05060a}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px}.footer-grid .brand{margin-bottom:13px}.footer-grid .brand span{font-size:9.5px}.footer-grid p{max-width:520px;font-size:12px;margin-top:6px}.footer-grid strong{display:block;margin-bottom:12px;font-size:13px}.footer-links{display:grid;gap:8px}.footer-links a{color:var(--muted);font-size:12px}.footer-links a:hover{color:var(--purple)}.site-footer .container{display:flex;justify-content:space-between;align-items:center;gap:25px}

/* RESPONSIVE */
@media(max-width:1120px){.navlinks{gap:13px}.navlinks a{font-size:12px}.brand{min-width:225px}.brand span{font-size:9.5px}}
@media(max-width:980px){.menu{display:flex}.nav-inner{min-height:70px;flex-wrap:wrap;padding:12px 0}.navlinks{display:none;width:100%;flex-direction:column;align-items:stretch;gap:0;padding:10px 0 4px;border-top:1px solid var(--line)}.navlinks.open{display:flex}.navlinks a{width:100%;padding:11px 3px}.navlinks a:not(.btn)::after{bottom:3px}.navlinks .btn{margin-top:7px}.grid-3,.people-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.roadmap{grid-template-columns:repeat(4,1fr)}.step:nth-child(4){border-right:none}.step:nth-child(-n+4){border-bottom:1px solid var(--line)}.footer-grid{grid-template-columns:1.5fr 1fr 1fr}}
@media(max-width:760px){.section-head{flex-direction:column;align-items:flex-start;gap:12px}.meta{grid-template-columns:1fr;max-width:600px}.timeline{grid-template-columns:1fr}.timeline-item{border-right:none;border-bottom:1px solid var(--line)}.timeline-item:last-child{border-bottom:none}.form-grid{grid-template-columns:1fr}.form-group.full{grid-column:auto}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}.research-grid{grid-template-columns:1fr}}
@media(max-width:600px){.container{width:min(90%,var(--max))}.brand{min-width:0;max-width:290px}.brand img{width:38px;height:38px}.brand span{font-size:8.5px;letter-spacing:.06em}.hero{min-height:auto;padding:78px 0}.hero h1{font-size:clamp(40px,12vw,58px)}.lead{font-size:16px}.hero-actions,.button-row{flex-direction:column;align-items:stretch}.hero-actions .btn,.button-row .btn{width:100%}.page-hero{padding:70px 0 52px}.page-hero h1{font-size:44px}.section{padding:62px 0}.grid-2,.grid-3,.people-grid{grid-template-columns:1fr}.featured-event,.cta{padding:28px 22px}.card,.person-card,.publication-card,.research-card{padding:23px}.roadmap{grid-template-columns:1fr 1fr}.step{min-height:95px;border-bottom:1px solid var(--line)}.step:nth-child(2n){border-right:none}.step:nth-child(7),.step:nth-child(8){border-bottom:none}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.site-footer .container{flex-direction:column;align-items:flex-start}}
@media(max-width:400px){h1{font-size:39px}h2{font-size:30px}.brand span{font-size:7.8px}.roadmap{grid-template-columns:1fr}.step,.step:nth-child(2n){border-right:none}.step:nth-child(7){border-bottom:1px solid var(--line)}.step:last-child{border-bottom:none}}

/* EXTENDED UI COMPONENTS & UTILITIES */
.nav-hackathon {
  color: var(--purple) !important;
  font-weight: 600 !important;
}
.card.highlighted {
  border-color: rgba(184, 120, 255, 0.4);
  background: linear-gradient(135deg, rgba(184, 120, 255, 0.08), rgba(16, 18, 26, 0.95));
  box-shadow: 0 10px 30px rgba(184, 120, 255, 0.12);
}
.btn.sm {
  min-height: 34px;
  padding: 6px 13px;
  font-size: 12px;
}
.btn.lg {
  min-height: 48px;
  padding: 12px 24px;
  font-size: 14.5px;
}
.btn.outline-purple {
  border-color: rgba(184, 120, 255, 0.4);
  color: var(--purple);
  background: rgba(184, 120, 255, 0.06);
}
.btn.outline-purple:hover {
  background: rgba(184, 120, 255, 0.16);
  border-color: var(--purple);
  color: #fff;
}
.form-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px;
  box-shadow: var(--shadow);
}
.form-control {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface-2);
  color: var(--text);
  outline: none;
  font-family: inherit;
  font-size: 14px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.form-control:focus {
  border-color: var(--purple);
  box-shadow: 0 0 0 3px rgba(184, 120, 255, 0.15);
}
.form-hint {
  font-size: 12px;
  color: var(--muted-2);
  margin-top: 4px;
  display: block;
}
.required {
  color: #ef4444;
  font-weight: bold;
}
.small-note {
  font-size: 12px;
  color: var(--muted-2);
}
.alert {
  padding: 16px 20px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 20px;
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--text);
}
.alert.info {
  background: rgba(59, 130, 246, 0.1);
  border-color: rgba(59, 130, 246, 0.3);
  color: #93c5fd;
}
.alert.warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.3);
  color: #fcd34d;
}
.alert.success {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.3);
  color: #6ee7b7;
}
.alert.error {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}
.status-pill.selected {
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.3);
}
.status-pill.submitted {
  background: rgba(184, 120, 255, 0.12);
  color: #b878ff;
  border: 1px solid rgba(184, 120, 255, 0.3);
}
.status-pill.not-selected {
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}
.btn.loading {
  opacity: 0.7;
  pointer-events: none;
  position: relative;
}
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 8px;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* =========================================================
   SITE-WIDE FLOATING FEEDBACK BUTTON & MODAL
   ========================================================= */
.floating-feedback-btn {
  position: fixed;
  right: 22px;
  bottom: 26px;
  z-index: 1500;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: linear-gradient(135deg, var(--purple), var(--purple-2));
  color: #08060d;
  font-size: 13px;
  font-weight: 700;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 10px 25px rgba(184, 120, 255, 0.35);
  cursor: pointer;
  transition: transform 0.22s ease, box-shadow 0.22s ease;
  user-select: none;
  font-family: inherit;
}

.floating-feedback-btn:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 32px rgba(184, 120, 255, 0.45);
}

.floating-feedback-btn:active {
  transform: translateY(0);
}

.floating-feedback-btn span.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
}

@media (max-width: 600px) {
  .floating-feedback-btn {
    right: 14px;
    bottom: 16px;
    padding: 8px 14px;
    font-size: 12px;
  }
}

.feedback-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 2100;
  background: rgba(5, 6, 10, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.feedback-modal-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}

.feedback-modal {
  width: min(94%, 560px);
  max-height: 90vh;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  box-shadow: 0 25px 70px rgba(0, 0, 0, 0.65);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(20px) scale(0.98);
  transition: transform 0.25s ease;
}

.feedback-modal-backdrop.is-open .feedback-modal {
  transform: translateY(0) scale(1);
}

.feedback-modal-header {
  padding: 22px 26px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface-2);
}

.feedback-modal-header h3 {
  font-size: 20px;
  margin: 0;
  color: var(--text);
}

.feedback-modal-body {
  padding: 26px;
  overflow-y: auto;
}

.feedback-modal-body form {
  display: grid;
  gap: 16px;
}