header.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 1.5rem clamp(1.5rem, 4vw, 3.5rem);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.1rem;
  padding: clamp(1rem, 2vw, 1.35rem) clamp(1.2rem, 3vw, 2.2rem);
}

.brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: url("../img/dark2.svg") center/contain no-repeat;
  box-shadow: 0 18px 30px rgba(27, 217, 210, 0.35);
  font-size: 0;
}

.site-nav-shell {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.5rem;
}

.nav-scroll-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  backdrop-filter: blur(10px);
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.22);
  opacity: 0;
  transform: translateY(2px);
  transition: opacity 0.2s ease, transform 0.2s ease, color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  cursor: pointer;
}

.nav-scroll-btn:hover {
  border-color: color-mix(in srgb, var(--accent-primary) 50%, transparent);
  color: var(--accent-primary);
  background: color-mix(in srgb, var(--accent-primary) 20%, transparent);
}

.nav-scroll-btn:disabled {
  opacity: 0;
  pointer-events: none;
}

.site-nav-shell.can-scroll-left .nav-scroll-btn--left,
.site-nav-shell.can-scroll-right .nav-scroll-btn--right {
  opacity: 0.9;
  pointer-events: auto;
  transform: translateY(0);
}

.site-nav-shell.can-scroll-left .nav-scroll-btn--left {
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex: 1 1 auto;
  min-width: 0;
  padding: 0.35rem 1.35rem;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  scroll-behavior: smooth;
  mask-image: linear-gradient(90deg, transparent 0, #000 18px, #000 calc(100% - 18px), transparent 100%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 18px, #000 calc(100% - 18px), transparent 100%);
}

.site-nav::-webkit-scrollbar {
  display: none;
}

.site-nav a,
.site-nav button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.06);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
  color: var(--text-primary);
  font: inherit;
  cursor: pointer;
  white-space: nowrap;
  scroll-snap-align: start;
}

.site-nav a:hover,
.site-nav button:hover,
.site-nav a.active {
  border-color: color-mix(in srgb, var(--accent-primary) 60%, transparent);
  background: color-mix(in srgb, var(--accent-primary) 25%, transparent);
  color: var(--accent-primary);
}

.mobile-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.05);
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
}

.mobile-nav {
  position: fixed;
  inset: 16px;
  padding: 1.6rem;
  display: none;
  background: rgba(5, 8, 26, 0.92);
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
  z-index: 2000;
}

.mobile-nav.open {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.mobile-nav a,
.mobile-nav button {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  padding: 0.9rem 1.2rem;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  gap: 0.4rem;
  cursor: pointer;
}

.mobile-nav a:hover,
.mobile-nav button:hover,
.mobile-nav a.active {
  border-color: rgba(79, 223, 255, 0.6);
  background: rgba(79, 223, 255, 0.16);
}

main {
  padding: clamp(1.5rem, 4vw, 3rem);
  display: flex;
  flex-direction: column;
  gap: clamp(2rem, 5vw, 3rem);
  align-items: stretch;
}

.session-banner {
  width: min(1200px, 100%);
  margin: clamp(0.8rem, 3vw, 1.5rem) auto 0;
  padding: 0.9rem 1.4rem;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  font-size: 0.95rem;
  box-shadow: var(--glass-shadow);
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.session-banner:not([hidden]) {
  display: flex;
}

.session-banner[data-variant="success"] {
  border-color: rgba(0, 214, 147, 0.5);
  background: rgba(0, 214, 147, 0.12);
  color: #b2ffe5;
}

.session-banner[data-variant="warning"] {
  border-color: rgba(255, 175, 58, 0.45);
  background: rgba(255, 175, 58, 0.14);
  color: #ffe4b2;
}

.banner-close {
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: transparent;
  color: var(--text-muted);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.banner-close:hover {
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--accent-primary);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(3rem, 8vw, 6rem);
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  gap: clamp(2rem, 5vw, 3.8rem);
}

.hero-content {
  max-width: 620px;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 1.5rem;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--accent-primary) 35%, transparent);
  background: color-mix(in srgb, var(--accent-primary) 18%, transparent);
  color: var(--accent-primary);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  font-size: 0.7rem;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.8rem);
  font-weight: 700;
  line-height: 1.1;
  margin: 0;
}

.hero-description {
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  color: var(--text-muted);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.floating-elements {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.floating-element {
  position: absolute;
  width: clamp(48px, 5vw, 65px);
  height: clamp(48px, 5vw, 65px);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: linear-gradient(155deg, rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0.06));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--text-primary);
  filter: drop-shadow(0 18px 40px rgba(0, 0, 0, 0.35));
  animation: drift 12s ease-in-out infinite;
}

.floating-element:nth-child(odd) {
  animation-duration: 16s;
  animation-delay: -5s;
}

.section {
  margin-top: clamp(3rem, 7vw, 5rem);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.section.glass-card {
  padding: clamp(1.8rem, 5vw, 2.6rem);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.section-title {
  margin: 0;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 600;
}

.card-grid {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.3rem);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.stats-grid {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.4rem);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.footer {
  padding: 3rem clamp(1.5rem, 4vw, 3.5rem) 4rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

@media (max-width: 960px) {
  .site-nav {
    display: none;
  }
  .site-nav-shell {
    display: none;
  }
  body.mobile-nav-open {
    overflow: hidden;
  }
  .mobile-toggle {
    display: inline-flex;
  }

  main {
    padding: clamp(1rem, 6vw, 2rem);
  }
}

@media (max-width: 720px) {
  .hero {
    padding: clamp(2rem, 8vw, 3rem);
  }

  .hero-title {
    font-size: clamp(2.3rem, 8vw, 3.2rem);
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
}