:root {
  --bg: #0c0c0c;
  --bg-accent: #1a1611;
  --panel: #171410;
  --accent: #f2d65e;
  --accent-dark: #b9932a;
  --text: #f5f1e6;
  --text2: #f2d65e;
  --muted: #c9c0a8;
  --border: rgba(245, 241, 230, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: linear-gradient(160deg, var(--bg) 0%, var(--bg-accent) 55%, #050403 100%);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

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

main a:not(.btn):not(.logo-mark) {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: rgba(242, 214, 94, 0.55);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

main a:not(.btn):not(.logo-mark):hover {
  color: #ffe27a;
  text-decoration-color: #ffe27a;
}

header {
  background: #0a0a0a;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.5);
}

.navbar {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.15rem 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.navbar h1 {
  font-size: 1.25rem;
  letter-spacing: 0.05em;
  margin: 0;
}

.navbar h1 a {
  text-decoration: none;
}

.logo-mark {
  display: inline-flex;
  align-items: center;
}

.logo-mark img {
  width: 64px;
  height: 64px;
  object-fit: contain;
  display: block;
}

.nav-links {
  display: flex;
  gap: 1.1rem;
  font-size: 0.95rem;
}

.nav-links a {
  padding-bottom: 0.2rem;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease;
}

.nav-links .external-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 0.25rem;
  padding: 0.05rem 0.2rem;
  border: 1px solid currentColor;
  border-radius: 0.2rem;
  font-size: 0.65rem;
  line-height: 1;
}

.nav-links a:hover,
.nav-links a:focus {
  border-color: var(--accent);
}

.nav-links a[aria-current='page'] {
  border-color: var(--accent);
  color: var(--accent);
}

.menu-toggle {
  display: none;
  background: rgba(245, 241, 230, 0.04);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.35rem 0.45rem;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  margin: 4px 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.menu-toggle[aria-expanded='true'] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.menu-toggle[aria-expanded='true'] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded='true'] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.menu-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.hero {
  max-width: 1100px;
  margin: 0 auto 2.5rem;
  padding: 4rem 1.5rem 3rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  align-items: center;
}

.hero-logo {
  display: flex;
  justify-content: center;
}

.hero-logo img {
  width: 100%;
  max-width: 320px;
  object-fit: contain;
}

.floating-banner {
  max-width: 720px;
  margin: 0 auto 2.5rem;
  background: rgba(242, 214, 94, 0.1);
  border: 1px solid rgba(242, 214, 94, 0.4);
  border-radius: 999px;
  padding: 0.85rem 1.5rem;
  font-size: 0.95rem;
  text-align: center;
  backdrop-filter: blur(6px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.floating-banner a {
  color: var(--accent);
  font-weight: 600;
}

.hero h1 {
  margin: 0 0 0.25rem;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero h2 {
  color: var(--text2);
  font-size: 2.5rem;
  margin: 0 0 1rem;
}

.hero p {
  color: var(--text);
  max-width: 640px;
}

.hero .cta-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #1a1608;
}

.btn-secondary {
  border-color: var(--border);
}

section {
  padding: 3.5rem 1.5rem;
  border-top: 1px solid var(--border);
}

section:nth-of-type(odd) {
  background: var(--panel);
}

.content-placeholder {
  padding: 4rem 1.5rem 3rem;
}

.content-placeholder > h2 {
  margin: 0 0 1.5rem;
}

.team-section {
  padding: 4rem 1.5rem 3rem;
  background: var(--panel);
  border-top: 1px solid var(--border);
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-inner h3 {
  margin-top: 0;
  font-size: 1.75rem;
}

.text-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
  color: var(--muted);
}

.text-columns p {
  margin: 0;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.stat-card {
  padding: 1.25rem 1.5rem;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(23, 20, 16, 0.7);
}

.overview-card {
  margin-bottom: 2.5rem;
}

.overview-card .text-columns {
  display: block;
  margin-bottom: 0;
  column-count: 1;
  column-gap: 2rem;
}

.overview-card .text-columns p {
  max-width: none;
  margin: 0 0 1.5rem;
  break-inside: avoid-column;
}

.overview-card .text-columns p:last-child {
  margin-bottom: 0;
}

@media (min-width: 900px) {
  .overview-card .text-columns {
    column-count: 2;
  }
}

.stat-card h3,
.stat-card h4 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.team-card {
  padding: 1.5rem;
}

.team-card h3 {
  font-size: 1.15rem;
  margin: 0 0 0.35rem;
}

.team-role {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  color: var(--muted);
}

.experiment-list,
.placeholder-list,
.contact-list {
  margin: 1rem 0 1.25rem;
  padding-left: 1.25rem;
  color: var(--text);
}

.experiment-list li + li,
.placeholder-list li + li,
.contact-list li + li {
  margin-top: 0.4rem;
}

.grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(13, 11, 8, 0.6);
}

.card h4 {
  margin-top: 0;
}

.link-card {
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.link-card:hover,
.link-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
  border-color: var(--accent);
}

footer {
  text-align: center;
  padding: 2.5rem 1.5rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

footer .footer-links {
  margin-top: 0.5rem;
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .nav-links {
    flex-wrap: wrap;
    row-gap: 0.5rem;
  }

  .hero h2 {
    font-size: 2rem;
  }

  .hero .cta-group {
    flex-direction: column;
  }

  .navbar {
    flex-wrap: wrap;
  }

  .menu-toggle {
    display: inline-flex;
    flex-direction: column;
    margin-left: auto;
  }

  .nav-links {
    width: 100%;
    flex-direction: column;
    gap: 0;
    margin: 0;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    border-top: 1px solid transparent;
    transition: max-height 0.3s ease, border-color 0.3s ease, padding 0.3s ease;
  }

  .nav-links a {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open {
    max-height: 320px;
    padding-top: 0.75rem;
    border-color: var(--border);
  }
}