:root {
  --primary: #6366f1;
  --secondary: #8b5cf6;
  --background-dark: #0f172a;
  --background-light: #f8fafc;
  --surface-dark: rgba(30, 41, 59, 0.7);
  --surface-light: rgba(255, 255, 255, 0.7);
  --text-dark: #f8fafc;
  --text-light: #0f172a;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--background-dark);
  color: var(--text-dark);
  transition: all 0.3s ease;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: absolute;
  top: -20%;
  left: -10%;
  width: 50%;
  height: 50%;
  background: radial-gradient(circle, rgba(99,102,241,0.15) 0%, rgba(15,23,42,0) 70%);
  z-index: -1;
  border-radius: 50%;
  animation: float 15s ease-in-out infinite;
}

body::after {
  content: '';
  position: absolute;
  bottom: -20%;
  right: -10%;
  width: 60%;
  height: 60%;
  background: radial-gradient(circle, rgba(139,92,246,0.1) 0%, rgba(15,23,42,0) 70%);
  z-index: -1;
  border-radius: 50%;
  animation: float 20s ease-in-out infinite reverse;
}

/* Glassmorphism Classes */
.glass {
  background: var(--surface-dark);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

.glass-card {
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.glass-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px 0 rgba(0, 0, 0, 0.4);
  border-color: rgba(255, 255, 255, 0.3);
}

/* Gradients */
.text-gradient {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Animations */
@keyframes float {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-30px) rotate(5deg); }
  100% { transform: translateY(0px) rotate(0deg); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.8s ease-out forwards;
}

.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--background-dark);
}
::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--secondary);
}

/* Input custom styles for calculator */
input[type="number"]::-webkit-inner-spin-button, 
input[type="number"]::-webkit-outer-spin-button { 
  -webkit-appearance: none; 
  margin: 0; 
}
input[type="number"] {
  -moz-appearance: textfield;
}

.input-glass {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: white;
  transition: all 0.3s ease;
}

.input-glass:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.3);
}