*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --bg: #0a0a0f;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --surface: rgba(255, 255, 255, 0.05);
  --surface-border: rgba(255, 255, 255, 0.1);
  --gradient-1: #1e1b4b;
  --gradient-2: #312e81;
  --gradient-3: #0f172a;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f8fafc;
    --text: #1e293b;
    --text-muted: #64748b;
    --surface: rgba(255, 255, 255, 0.7);
    --surface-border: rgba(0, 0, 0, 0.08);
    --gradient-1: #e0e7ff;
    --gradient-2: #c7d2fe;
    --gradient-3: #f1f5f9;
  }
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
}

.mesh-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 30%, var(--gradient-1) 0%, transparent 60%),
    radial-gradient(ellipse 70% 50% at 80% 70%, var(--gradient-2) 0%, transparent 55%),
    radial-gradient(ellipse 60% 40% at 50% 50%, var(--gradient-3) 0%, transparent 70%),
    var(--bg);
  animation: meshShift 18s ease-in-out infinite alternate;
}

.mesh-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  pointer-events: none;
}

@keyframes meshShift {
  0% {
    filter: hue-rotate(0deg);
    transform: scale(1);
  }
  100% {
    filter: hue-rotate(12deg);
    transform: scale(1.03);
  }
}

.hub {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
}

.hub-card {
  width: 100%;
  max-width: 420px;
  text-align: center;
  padding: 2.5rem 2rem;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 1.25rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.hub-name {
  margin: 0 0 0.35rem;
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hub-tagline {
  margin: 0 0 2rem;
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: 400;
}

.hub-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.hub-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.25rem;
  border-radius: 0.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--surface-border);
  transition: border-color 0.2s, transform 0.15s, background 0.2s;
}

.hub-link:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.hub-link--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

.hub-link--primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
}

.hub-link svg {
  width: 1.15rem;
  height: 1.15rem;
  flex-shrink: 0;
}

.hub-profiles {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.hub-profile {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--surface-border);
  transition: color 0.2s, border-color 0.2s, transform 0.15s;
}

.hub-profile:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.hub-profile svg {
  width: 1.25rem;
  height: 1.25rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}