/* === Reset & Base v4.0 === */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { 
  font-size: 16px; 
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  background-image: 
    radial-gradient(ellipse at 50% 0%, rgba(0, 255, 136, 0.03) 0%, transparent 50%),
    radial-gradient(ellipse at 100% 100%, rgba(0, 212, 255, 0.02) 0%, transparent 50%);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Smooth scroll */
html { scroll-behavior: smooth; }

/* Focus ring — visible only on keyboard navigation */
:focus-visible { 
  outline: 2px solid var(--accent); 
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* Selection */
::selection { 
  background: var(--accent); 
  color: #000; 
}

/* Modern scrollbar */
::-webkit-scrollbar { 
  width: 8px; 
  height: 8px;
}
::-webkit-scrollbar-track { 
  background: var(--bg-primary); 
}
::-webkit-scrollbar-thumb { 
  background: var(--bg-elevated); 
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-primary);
  transition: background var(--transition-fast);
}
::-webkit-scrollbar-thumb:hover { 
  background: var(--bg-hover); 
}
::-webkit-scrollbar-corner {
  background: var(--bg-primary);
}

/* Firefox scrollbar */
* { scrollbar-width: thin; scrollbar-color: var(--bg-elevated) var(--bg-primary); }

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

/* Images */
img { 
  max-width: 100%; 
  height: auto; 
  display: block;
}

/* Utility classes */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

/* Text utilities */
.text-accent { color: var(--accent); }
.text-cyan { color: var(--cyan); }
.text-gold { color: var(--gold); }
.text-red { color: var(--red); }
.text-green { color: var(--green); }
.text-blue { color: var(--blue); }
.text-purple { color: var(--purple); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-uppercase { text-transform: uppercase; letter-spacing: 0.5px; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }
.font-mono { font-family: var(--font-mono); }
.truncate { overflow: hidden; text-overflow: ellipsis white-space: nowrap; }
.line-clamp-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.line-clamp-3 { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

/* Display utilities */
.hidden { display: none !important; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

/* Flex utilities */
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.flex-1 { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }

/* Gap utilities */
.gap-1 { gap: var(--space-xs); }
.gap-2 { gap: var(--space-sm); }
.gap-3 { gap: var(--space-md); }
.gap-4 { gap: var(--space-lg); }
.gap-6 { gap: var(--space-xl); }
.gap-8 { gap: var(--space-2xl); }

/* Spacing utilities */
.p-1 { padding: var(--space-xs); }
.p-2 { padding: var(--space-sm); }
.p-3 { padding: var(--space-md); }
.p-4 { padding: var(--space-lg); }
.p-6 { padding: var(--space-xl); }
.p-8 { padding: var(--space-2xl); }
.px-2 { padding-left: var(--space-sm); padding-right: var(--space-sm); }
.px-3 { padding-left: var(--space-md); padding-right: var(--space-md); }
.px-4 { padding-left: var(--space-lg); padding-right: var(--space-lg); }
.py-2 { padding-top: var(--space-sm); padding-bottom: var(--space-sm); }
.py-3 { padding-top: var(--space-md); padding-bottom: var(--space-md); }
.py-4 { padding-top: var(--space-lg); padding-bottom: var(--space-lg); }
.m-0 { margin: 0; }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-6 { margin-bottom: var(--space-xl); }
.mt-2 { margin-top: var(--space-sm); }
.mt-4 { margin-top: var(--space-lg); }
.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }

/* Width utilities */
.w-full { width: 100%; }
.max-w-sm { max-width: 24rem; }
.max-w-md { max-width: 28rem; }
.max-w-lg { max-width: 32rem; }
.max-w-xl { max-width: 36rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-4xl { max-width: 56rem; }

/* Border utilities */
.rounded { border-radius: var(--radius); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }
.border { border: 1px solid var(--border); }
.border-accent { border: 1px solid var(--border-accent); }

/* Background utilities */
.bg-primary { background: var(--bg-primary); }
.bg-surface { background: var(--bg-surface); }
.bg-elevated { background: var(--bg-elevated); }
.bg-glass { background: var(--bg-glass); backdrop-filter: blur(12px); }

/* Shadow utilities */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-accent { box-shadow: var(--shadow-accent); }

/* Overflow utilities */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }

/* Position utilities */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }

/* Cursor utilities */
.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }

/* Opacity utilities */
.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

/* Transition utilities */
.transition { transition: all var(--transition-normal); }
.transition-fast { transition: all var(--transition-fast); }
.transition-slow { transition: all var(--transition-slow); }

/* Animation utilities */
.animate-spin { animation: spin 1s linear infinite; }
.animate-pulse { animation: pulse 2s ease-in-out infinite; }
.animate-bounce { animation: bounce 1s ease infinite; }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
@keyframes bounce {
  0%, 100% { transform: translateY(-25%); animation-timing-function: cubic-bezier(0.8, 0, 1, 1); }
  50% { transform: translateY(0); animation-timing-function: cubic-bezier(0, 0, 0.2, 1); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}
@keyframes slideInLeft {
  from { transform: translateX(-100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}
@keyframes scaleIn {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
@keyframes glow {
  0%, 100% { box-shadow: 0 0 5px var(--accent-glow); }
  50% { box-shadow: 0 0 20px var(--accent-glow), 0 0 30px var(--accent-glow); }
}

/* Animation classes */
.animate-fadeIn { animation: fadeIn var(--transition-normal) ease-out; }
.animate-fadeInUp { animation: fadeInUp var(--transition-normal) ease-out; }
.animate-fadeInDown { animation: fadeInDown var(--transition-normal) ease-out; }
.animate-slideInRight { animation: slideInRight var(--transition-slow) ease-out; }
.animate-scaleIn { animation: scaleIn var(--transition-normal) ease-out; }
.animate-glow { animation: glow 2s ease-in-out infinite; }