:root {
  --navy: #07182E;
  --navy-2: #0E2746;
  --orange: #FF6B00;
  --orange-dark: #D95B00;
  --bg: #F6F8FB;
  --bg-soft: #EEF3F8;
  --card: #FFFFFF;
  --border: #DCE4EF;
  --text: #11243A;
  --muted: #526173;
  --white: #FFFFFF;
  --shadow: 0 22px 70px rgba(7, 24, 46, 0.12);
  --shadow-soft: 0 14px 40px rgba(7, 24, 46, 0.08);
  --max-width: 1240px;
  --font-serif: 'IBM Plex Serif', Georgia, serif;
  --font-sans: 'IBM Plex Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --ease: 0.22s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  font-size: 17px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button, input, textarea { font: inherit; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 40px; }
.skip-link {
  position: absolute; top: -100%; left: 20px; z-index: 200;
  background: var(--orange); color: var(--white); padding: 10px 18px;
  font-size: 0.82rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em;
  transition: top var(--ease);
}
.skip-link:focus { top: 8px; }
:focus-visible { outline: 3px solid rgba(255, 107, 0, 0.75); outline-offset: 4px; }
:focus:not(:focus-visible) { outline: none; }

/* Navigation */
#header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(7, 24, 46, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.12);
  transition: box-shadow var(--ease), background var(--ease);
}
#header.scrolled { background: rgba(7, 24, 46, 0.98); box-shadow: 0 12px 34px rgba(7,24,46,0.28); }
.navbar { height: 72px; }
.nav-container { height: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 40px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.nav-logo { display: inline-flex; align-items: center; gap: 12px; color: var(--white); font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; font-size: 0.98rem; }
.nav-logo-mark { display: inline-flex; width: 34px; height: 34px; align-items: center; justify-content: center; border: 1px solid rgba(255,255,255,0.24); background: rgba(255,255,255,0.08); color: var(--orange); font-family: var(--font-serif); font-weight: 700; }
.nav-links { display: flex; align-items: center; gap: clamp(18px, 2.2vw, 30px); }
.nav-links a { color: rgba(255,255,255,0.76); font-size: 0.82rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; position: relative; padding: 24px 0; transition: color var(--ease); }
.nav-links a::after { content: ''; position: absolute; left: 0; bottom: 18px; height: 2px; width: 0; background: var(--orange); transition: width var(--ease); }
.nav-links a:hover, .nav-links a.active { color: var(--white); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 10px; margin: -10px; }
.hamburger span { width: 26px; height: 2px; background: var(--white); border-radius: 10px; transition: transform var(--ease), opacity var(--ease); }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero */
.hero { position: relative; min-height: 100vh; min-height: 100svh; padding-top: 72px; display: flex; align-items: stretch; color: var(--white); overflow: hidden; }
.hero-bg { position: absolute; inset: 0; overflow: hidden; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; object-position: 43% 47%; transform: scale(1.03); }
.hero-overlay { position: absolute; inset: 0; background:
  radial-gradient(circle at 75% 25%, rgba(255,107,0,0.22), transparent 34%),
  linear-gradient(100deg, rgba(7,24,46,0.96) 0%, rgba(7,24,46,0.82) 44%, rgba(7,24,46,0.45) 100%),
  linear-gradient(to bottom, rgba(7,24,46,0.25), rgba(7,24,46,0.92)); }
.hero-content { position: relative; z-index: 1; width: 100%; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.55fr); gap: 56px; align-items: center; padding-top: 82px; padding-bottom: 92px; }
.hero-copy { max-width: 820px; }
.eyebrow { color: var(--orange); font-size: 0.82rem; font-weight: 800; letter-spacing: 0.13em; text-transform: uppercase; margin-bottom: 14px; }
.hero h1 { font-family: var(--font-serif); font-size: clamp(3.2rem, 7vw, 7.2rem); line-height: 0.98; letter-spacing: -0.055em; text-transform: uppercase; margin-bottom: 28px; max-width: 880px; text-shadow: 0 16px 42px rgba(0,0,0,0.36); }
.hero-lede { font-size: clamp(1.08rem, 1.7vw, 1.35rem); max-width: 760px; color: rgba(255,255,255,0.88); line-height: 1.72; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 13px 24px; font-weight: 800; font-size: 0.86rem; text-transform: uppercase; letter-spacing: 0.08em; transition: transform var(--ease), background var(--ease), border-color var(--ease), color var(--ease); }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--orange); color: var(--white); border: 2px solid var(--orange); }
.btn-primary:hover { background: var(--orange-dark); border-color: var(--orange-dark); }
.btn-secondary { color: var(--white); border: 2px solid rgba(255,255,255,0.32); background: rgba(255,255,255,0.08); }
.btn-secondary:hover { border-color: var(--white); background: rgba(255,255,255,0.14); }
.hero-panel { align-self: end; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.22); box-shadow: 0 24px 90px rgba(0,0,0,0.22); backdrop-filter: blur(18px); padding: 26px; }
.hero-panel-header { display: flex; align-items: center; justify-content: space-between; padding-bottom: 18px; border-bottom: 1px solid rgba(255,255,255,0.18); margin-bottom: 20px; }
.panel-label { font-size: 0.78rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.12em; color: rgba(255,255,255,0.78); }
.panel-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--orange); box-shadow: 0 0 0 8px rgba(255,107,0,0.16); }
.hero-stat-grid { display: grid; gap: 18px; }
.hero-stat { display: grid; gap: 4px; }
.hero-stat strong { font-family: var(--font-serif); font-size: 1.55rem; line-height: 1.1; }
.hero-stat span { color: rgba(255,255,255,0.76); font-size: 0.95rem; }
.hero-scroll { position: absolute; left: 40px; bottom: 30px; color: rgba(255,255,255,0.65); animation: hero-bounce 2.4s ease-in-out infinite; }
@keyframes hero-bounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(7px); } }

/* Sections */
.section-technology, .section-focus, .section-team, .section-publications, .section-contact { padding: 112px 0; scroll-margin-top: 72px; }
.section-technology, .section-team, .section-contact { background: var(--card); }
.section-focus, .section-publications { background: var(--bg); }
.section-heading { max-width: 850px; margin-bottom: 48px; }
.section-heading h2, .contact-info h2 { font-family: var(--font-serif); color: var(--navy); font-size: clamp(2.35rem, 4.2vw, 4.75rem); line-height: 1.05; letter-spacing: -0.045em; margin-bottom: 18px; }
.section-heading p:not(.eyebrow), .contact-info p { color: var(--muted); font-size: 1.08rem; max-width: 780px; }

/* Technology */
.technology-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.technology-card { position: relative; background: var(--card); border: 1px solid var(--border); box-shadow: var(--shadow-soft); padding: 34px; min-height: 310px; overflow: hidden; transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease); }
.technology-card::before { content: ''; position: absolute; inset: 0 0 auto 0; height: 5px; background: linear-gradient(90deg, var(--orange), rgba(255,107,0,0)); }
.technology-card::after { content: '→'; position: absolute; top: 30px; right: 28px; color: rgba(255,107,0,0.28); font-size: 2rem; }
.technology-card:last-child::after { content: ''; }
.technology-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: rgba(255,107,0,0.35); }
.technology-kicker { display: inline-flex; width: 52px; height: 52px; align-items: center; justify-content: center; background: var(--bg-soft); color: var(--orange); font-weight: 800; border-radius: 50%; margin-bottom: 28px; }
.technology-card h3 { font-size: 1.42rem; line-height: 1.2; margin-bottom: 14px; color: var(--navy); }
.technology-card p { color: var(--muted); font-size: 1rem; }

/* Focus */
.focus-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.focus-item { display: grid; grid-template-columns: auto 1fr; gap: 18px 22px; background: var(--card); border: 1px solid var(--border); padding: 28px; box-shadow: 0 12px 34px rgba(7,24,46,0.06); transition: transform var(--ease), border-color var(--ease); }
.focus-item:hover { transform: translateY(-4px); border-color: rgba(255,107,0,0.35); }
.focus-icon { grid-row: span 2; width: 46px; height: 46px; display: inline-flex; align-items: center; justify-content: center; background: var(--navy); color: var(--white); font-size: 0.82rem; font-weight: 800; }
.focus-item h3 { font-size: 1.22rem; color: var(--navy); text-transform: uppercase; letter-spacing: 0.04em; line-height: 1.25; }
.focus-item p { color: var(--muted); font-size: 1rem; }

/* Team */
.team-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 22px; }
.team-card { background: var(--card); border: 1px solid var(--border); box-shadow: 0 12px 34px rgba(7,24,46,0.06); overflow: hidden; transition: transform var(--ease), box-shadow var(--ease); }
.team-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-soft); }
.team-photo { aspect-ratio: 4 / 5; background: var(--bg-soft); overflow: hidden; }
.team-photo img { width: 100%; height: 100%; object-fit: cover; object-position: center 20%; transition: transform 0.55s ease; }
.team-card:hover .team-photo img { transform: scale(1.05); }
.team-info { padding: 20px 18px 22px; }
.team-info h3 { font-size: 0.98rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--navy); margin-bottom: 8px; line-height: 1.35; }
.team-info h3 a { text-decoration: underline; text-decoration-color: transparent; text-underline-offset: 4px; transition: color var(--ease), text-decoration-color var(--ease); }
.team-info h3 a:hover { color: var(--orange); text-decoration-color: var(--orange); }
.team-info p { color: var(--muted); font-size: 0.91rem; line-height: 1.55; }

/* Publications */
.publications-heading { max-width: none; display: grid; grid-template-columns: 1fr minmax(320px, 460px); gap: 40px; align-items: end; }
.publication-tools { margin: 0; }
.publication-tools label { display: block; font-size: 0.78rem; color: var(--navy); font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 10px; }
.publication-search-wrap { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 12px; }
.publication-search { width: 100%; border: 1px solid var(--border); background: var(--card); color: var(--text); padding: 13px 14px; border-radius: 0; box-shadow: 0 8px 22px rgba(7,24,46,0.04); }
.publication-search:focus { border-color: var(--orange); box-shadow: 0 0 0 4px rgba(255,107,0,0.12); }
.publication-count, .publication-empty { color: var(--muted); font-size: 0.9rem; }
.publications-list { display: grid; gap: 16px; }
.publication-card { background: var(--card); border: 1px solid var(--border); border-left: 5px solid var(--orange); padding: 28px 30px; box-shadow: 0 12px 34px rgba(7,24,46,0.055); transition: transform var(--ease), box-shadow var(--ease); }
.publication-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-soft); }
.publication-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.publication-meta span { display: inline-flex; border: 1px solid var(--border); background: var(--bg); padding: 4px 9px; font-size: 0.72rem; font-weight: 800; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.publication-card h3 { font-size: clamp(1.15rem, 2vw, 1.55rem); line-height: 1.35; color: var(--navy); margin-bottom: 10px; }
.publication-card p { color: var(--muted); font-size: 0.98rem; margin-bottom: 6px; }
.pub-venue { color: var(--orange) !important; font-weight: 700; }
.publication-link { display: inline-flex; margin-top: 14px; align-items: center; gap: 8px; color: var(--navy); font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.8rem; }
.publication-link::after { content: '→'; color: var(--orange); transition: transform var(--ease); }
.publication-link:hover::after { transform: translateX(4px); }
.publication-empty { margin-top: 24px; }

/* Contact */
.contact-wrapper { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 56px; align-items: start; background: var(--navy); color: var(--white); padding: 48px; box-shadow: var(--shadow); }
.contact-info h2 { color: var(--white); }
.contact-info p { color: rgba(255,255,255,0.76); }
.contact-info a { color: var(--white); text-decoration: underline; text-decoration-color: rgba(255,107,0,0.75); text-underline-offset: 4px; }
.contact-line { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 22px; }
.copy-email { border: 1px solid rgba(255,255,255,0.24); background: rgba(255,255,255,0.08); color: var(--white); padding: 6px 10px; cursor: pointer; font-size: 0.76rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; transition: background var(--ease), border-color var(--ease); }
.copy-email:hover { background: var(--orange); border-color: var(--orange); }
.copy-status { min-height: 1.4em; color: #86efac !important; font-size: 0.9rem !important; margin-top: 8px; }
.copy-status.error { color: #fca5a5 !important; }
.contact-form { display: flex; flex-direction: column; gap: 18px; background: var(--card); color: var(--text); padding: 30px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 7px; }
.form-group label { font-size: 0.76rem; color: var(--navy); font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; }
.form-group label span { color: var(--orange); }
.form-group input, .form-group textarea { width: 100%; background: var(--bg); border: 1px solid var(--border); color: var(--text); padding: 13px 14px; border-radius: 0; transition: border-color var(--ease), box-shadow var(--ease); }
.form-group input:focus, .form-group textarea:focus { border-color: var(--orange); box-shadow: 0 0 0 4px rgba(255,107,0,0.12); }
.form-group input.error, .form-group textarea.error { border-color: #dc2626; }
.form-group textarea { min-height: 150px; resize: vertical; }
.field-error { display: none; color: #dc2626; font-size: 0.82rem; }
.form-group.has-error .field-error { display: block; }
.char-counter { color: #718096; font-size: 0.78rem; text-align: right; }
.char-counter.warning { color: var(--orange); }
.char-counter.danger { color: #dc2626; }
.form-actions { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.btn-submit { background: var(--navy); color: var(--white); border: 2px solid var(--navy); padding: 13px 28px; cursor: pointer; font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; transition: background var(--ease), border-color var(--ease), transform var(--ease); }
.btn-submit:hover { background: var(--orange); border-color: var(--orange); transform: translateY(-2px); }
.form-success { color: #16a34a; font-weight: 700; }
.form-honeypot { display: none !important; visibility: hidden; position: absolute; left: -9999px; }
.copy-buffer { position: fixed; top: -1000px; left: 0; width: 1px; height: 1px; opacity: 0; }

/* Footer */
footer { background: #061325; color: var(--white); padding: 64px 0; }
.footer-container { display: grid; grid-template-columns: 1fr auto; gap: 42px; align-items: start; }
.footer-kicker { color: var(--orange); font-weight: 800; text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.82rem; margin-bottom: 14px; }
.footer-brand { font-family: var(--font-serif); font-size: clamp(1.7rem, 4vw, 4.2rem); line-height: 1.05; letter-spacing: -0.04em; max-width: 760px; }
.footer-links { display: grid; gap: 10px; min-width: 160px; }
.footer-links a { color: rgba(255,255,255,0.72); font-weight: 700; transition: color var(--ease); }
.footer-links a:hover { color: var(--orange); }

/* Back to top and animation */
.back-to-top { position: fixed; right: 28px; bottom: 28px; z-index: 90; width: 46px; height: 46px; display: flex; align-items: center; justify-content: center; background: var(--navy); color: var(--white); border: none; cursor: pointer; opacity: 0; transform: translateY(10px); pointer-events: none; transition: opacity var(--ease), transform var(--ease), background var(--ease); box-shadow: 0 14px 32px rgba(7,24,46,0.28); }
.back-to-top.visible { opacity: 1; transform: none; pointer-events: auto; }
.back-to-top:hover { background: var(--orange); }
.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.js .reveal.visible { opacity: 1; transform: none; }
.team-card.reveal:nth-child(2), .publication-card.reveal:nth-child(2) { transition-delay: 0.06s; }
.team-card.reveal:nth-child(3), .publication-card.reveal:nth-child(3) { transition-delay: 0.12s; }
.team-card.reveal:nth-child(4), .publication-card.reveal:nth-child(4) { transition-delay: 0.18s; }
.team-card.reveal:nth-child(5) { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .js .reveal { opacity: 1; transform: none; transition: none; }
  .hero-scroll { animation: none; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

@media (min-width: 1440px) {
  :root { --max-width: 1400px; }
  .container, .nav-container { padding-left: 56px; padding-right: 56px; }
  .team-grid { gap: 28px; }
}

@media (max-width: 1120px) {
  .hero-content { grid-template-columns: 1fr; gap: 34px; }
  .hero-panel { max-width: 640px; align-self: auto; }
  .team-grid { grid-template-columns: repeat(3, 1fr); }
  .technology-grid { grid-template-columns: 1fr; }
  .technology-card { min-height: auto; }
  .technology-card::after { content: ''; }
  .publications-heading, .contact-wrapper { grid-template-columns: 1fr; }
}

@media (max-width: 767px) {
  body { font-size: 16px; }
  .container, .nav-container { padding-left: 20px; padding-right: 20px; }
  .navbar { height: 64px; }
  .hero { padding-top: 64px; }
  .nav-logo { font-size: 0.9rem; }
  .nav-logo-mark { width: 30px; height: 30px; }
  .hamburger { display: flex; }
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; background: rgba(7,24,46,0.98); flex-direction: column; gap: 0; border-top: 1px solid rgba(255,255,255,0.12); padding: 8px 0 14px; }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; border-bottom: 1px solid rgba(255,255,255,0.08); }
  .nav-links a { display: block; padding: 15px 20px; }
  .nav-links a::after { display: none; }
  .hero-content { padding-top: 54px; padding-bottom: 72px; }
  .hero h1 { font-size: clamp(2.55rem, 15vw, 4.5rem); }
  .hero-lede { font-size: 1.02rem; }
  .hero-panel { padding: 20px; }
  .hero-scroll { left: 20px; bottom: 20px; }
  .section-technology, .section-focus, .section-team, .section-publications, .section-contact { padding: 72px 0; scroll-margin-top: 64px; }
  .section-heading { margin-bottom: 32px; }
  .technology-card, .focus-item, .publication-card { padding: 24px; }
  .focus-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .team-info { padding: 16px; }
  .publication-search-wrap { grid-template-columns: 1fr; }
  .contact-wrapper { padding: 28px 20px; }
  .contact-form { padding: 22px; }
  .form-row { grid-template-columns: 1fr; }
  .btn-submit { width: 100%; }
  .footer-container { grid-template-columns: 1fr; }
}

@media (max-width: 479px) {
  .hero-actions { display: grid; }
  .btn { width: 100%; }
  .team-grid { grid-template-columns: 1fr; }
  .footer-brand { font-size: 1.85rem; }
}

@media print {
  #header, footer, .btn, .btn-submit, .back-to-top, .hero-scroll, .publication-tools { display: none !important; }
  body { background: #fff; color: #000; }
  .hero { min-height: auto; padding-top: 0; color: #000; }
  .hero-bg, .hero-overlay, .hero-panel { display: none; }
  .hero h1, .section-heading h2, .contact-info h2 { color: #000; }
  .section-technology, .section-focus, .section-team, .section-publications, .section-contact { padding: 32px 0; }
  .contact-wrapper, .contact-form, .publication-card, .technology-card, .focus-item, .team-card { box-shadow: none; border: 1px solid #ddd; background: #fff; color: #000; }
}