:root { 
  --brand: #06b6d4; 
  --ink: #0b1020;
  --cyan: #06b6d4;
  --purple: #7c3aed;
  --amber: #f59e0b;
  --rose: #f43f5e;
}

html { scroll-behavior: smooth; }
body { 
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, 'Helvetica Neue', Arial, 'Apple Color Emoji','Segoe UI Emoji';
  color: var(--ink);
  background-color: #fafafa;
}

.glass { 
  backdrop-filter: blur(16px); 
  background: rgba(255,255,255,0.75);
  -webkit-backdrop-filter: blur(16px);
}

.tag { 
  border: 1px solid rgba(0,0,0,0.08); 
  padding: 0.375rem 0.75rem; 
  border-radius: 999px; 
  font-size: 0.75rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.tag:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.pulse { 
  animation: pulse 2s ease-in-out infinite; 
}

@keyframes pulse { 
  0%,100% { opacity: 1; transform: scale(1); } 
  50% { opacity: 0.7; transform: scale(1.02); } 
}

.gradient-text { 
  background: linear-gradient(90deg, #06b6d4, #7c3aed, #06b6d4); 
  -webkit-background-clip: text; 
  background-clip: text; 
  color: transparent;
  background-size: 200% auto;
  animation: gradient 3s linear infinite;
}

@keyframes gradient {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

.card { 
  border: 1px solid rgba(0,0,0,0.06); 
  box-shadow: 0 4px 12px rgba(0,0,0,0.03);
  transition: all 0.3s ease;
  border-radius: 1rem;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.08);
}

.btn {
  transition: all 0.2s ease;
  font-weight: 600;
  border-radius: 0.75rem;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

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

.nav-link {
  position: relative;
  font-weight: 500;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand);
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,0,0,0.1), transparent);
  margin: 2rem 0;
}

.tier-card {
  position: relative;
  overflow: hidden;
}

.tier-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
}

.tier-1::before { background: var(--cyan); }
.tier-2::before { background: var(--purple); }
.tier-3::before { background: var(--amber); }
.tier-x::before { background: var(--rose); }

.floating {
  animation: floating 3s ease-in-out infinite;
}

@keyframes floating {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}

.glow {
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
}

/* Fade in up animation */
@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in-up {
  animation: fade-in-up 0.6s ease-out forwards;
}