/* CR2IQ v2 — Base Styles & Reset */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Neural Grid Background */
.neural-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: 
    radial-gradient(ellipse at 20% 20%, rgba(0, 240, 255, 0.03) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(255, 0, 170, 0.03) 0%, transparent 50%),
    var(--color-bg-primary);
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
  animation: gridPulse 8s ease-in-out infinite;
}

@keyframes gridPulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.8; }
}

/* Particles Container */
.particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--color-accent-cyan);
  border-radius: 50%;
  opacity: 0.6;
  animation: float 20s infinite linear;
}

@keyframes float {
  0% {
    transform: translateY(100vh) translateX(0);
    opacity: 0;
  }
  10% { opacity: 0.6; }
  90% { opacity: 0.6; }
  100% {
    transform: translateY(-100vh) translateX(100px);
    opacity: 0;
  }
}

/* Selection */
::selection {
  background: var(--color-accent-cyan-dim);
  color: var(--text-primary);
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-color-hover);
}

/* Focus Styles */
:focus-visible {
  outline: 2px solid var(--color-accent-cyan);
  outline-offset: 2px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p {
  color: var(--text-secondary);
}

/* Links */
a {
  color: var(--color-accent-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--text-primary);
  text-shadow: var(--glow-cyan);
}

/* Code/Mono */
code, pre, .mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* Utilities */
.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;
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glow-text {
  text-shadow: var(--glow-cyan);
}

/* App Container */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: var(--space-4);
  gap: var(--space-4);
}