:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111827;
  --accent-cyan: #06b6d4;
  --accent-purple: #a855f7;
  --accent-pink: #ec4899;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Grid background */
.grid-bg {
  background-image: 
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 50px 50px;
}

/* Animations */
@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fade-in-up {
  from { 
    opacity: 0; 
    transform: translateY(30px);
  }
  to { 
    opacity: 1; 
    transform: translateY(0);
  }
}

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

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pulse-slow {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.05); }
}

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

.animate-fade-in-up {
  opacity: 0;
  animation: fade-in-up 0.6s ease-out forwards;
}

.animate-gradient {
  background-size: 200% 200%;
  animation: gradient 3s ease infinite;
}

.animate-blink {
  animation: blink 1s step-end infinite;
}

.animate-spin-slow {
  animation: spin-slow 10s linear infinite;
}

.animate-pulse-slow {
  animation: pulse-slow 4s ease-in-out infinite;
}

.animation-delay-2000 {
  animation-delay: 2s;
}

.animation-delay-4000 {
  animation-delay: 4s;
}

/* Project card hover effects */
.project-card {
  transform: translateZ(0);
  will-change: transform, box-shadow;
}

.project-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 1rem;
  padding: 1px;
  background: linear-gradient(135deg, transparent, transparent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  transition: background 0.5s ease;
  pointer-events: none;
}

.project-card:hover::before {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple), var(--accent-pink));
}

/* Rainbow mode for easter egg */
.rainbow-mode {
  animation: rainbow-bg 2s linear infinite;
}

@keyframes rainbow-bg {
  0% { filter: hue-rotate(0deg); }
  100% { filter: hue-rotate(360deg); }
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--accent-cyan), var(--accent-purple));
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(var(--accent-purple), var(--accent-pink));
}

/* Selection styling */
::selection {
  background: rgba(6, 182, 212, 0.3);
  color: #fff;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
  .project-card:hover {
    transform: none;
  }
}

/* Smooth transitions for theme changes */
*, *::before, *::after {
  transition-property: background-color, border-color, color, fill, stroke;
  transition-duration: 0.15s;
  transition-timing-function: ease;
}