/* ==========================================================================
   TENSORARCADE DESIGN SYSTEM
   Neo-Brutalist Arcade Engineering Aesthetic
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&family=Press+Start+2P&family=Space+Mono:wght@400;700&display=swap');

:root {
  /* Theme: Retro Arcade Light (Default Canvas) */
  --bg-canvas: #FAF7EE;
  --bg-card: #FFFFFF;
  --bg-card-subtle: #F4EFE2;
  --bg-surface: #FFFFFF;
  --bg-surface-elevated: #FFFDF8;
  
  /* Text & Border Colors */
  --text-primary: #121826;
  --text-secondary: #475569;
  --text-muted: #64748B;
  --border-color: #1E293B;
  --border-width: 2.5px;
  
  /* Hard Neo-Brutalist Shadow Tokens */
  --shadow-color: #1E293B;
  --shadow-sm: 2px 2px 0px var(--shadow-color);
  --shadow-md: 4px 4px 0px var(--shadow-color);
  --shadow-lg: 6px 6px 0px var(--shadow-color);
  --shadow-xl: 8px 8px 0px var(--shadow-color);
  --shadow-inner: inset 2px 2px 0px rgba(0,0,0,0.1);
  
  /* Vibrant Arcade Accents */
  --arcade-amber: #F59E0B;
  --arcade-amber-light: #FEF3C7;
  --arcade-green: #10B981;
  --arcade-green-light: #D1FAE5;
  --arcade-blue: #0284C7;
  --arcade-blue-light: #E0F2FE;
  --arcade-red: #EF4444;
  --arcade-red-light: #FEE2E2;
  --arcade-purple: #8B5CF6;
  --arcade-purple-light: #EDE9FE;
  --arcade-cyan: #06B6D4;
  --arcade-cyan-light: #CFFAFE;
  
  /* Functional Colors */
  --accent-primary: var(--arcade-amber);
  --accent-primary-text: #1E293B;
  --badge-bg: #E2E8F0;
  --badge-text: #1E293B;
  --grid-dot-color: #D1CDBC;
  
  /* Typography */
  --font-pixel: 'Press Start 2P', monospace;
  --font-mono: 'JetBrains Mono', 'Space Mono', monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Geometry */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 9999px;
  
  /* Transitions */
  --transition-snappy: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Theme: Dark Cyber Arcade (Night Mode) */
[data-theme="dark"] {
  --bg-canvas: #0A0E17;
  --bg-card: #131A29;
  --bg-card-subtle: #1C263B;
  --bg-surface: #131A29;
  --bg-surface-elevated: #1E2B45;
  
  --text-primary: #F8FAFC;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --border-color: #334155;
  --shadow-color: #030712;
  
  --arcade-amber-light: rgba(245, 158, 11, 0.2);
  --arcade-green-light: rgba(16, 185, 129, 0.2);
  --arcade-blue-light: rgba(2, 132, 199, 0.2);
  --arcade-red-light: rgba(239, 68, 68, 0.2);
  --arcade-purple-light: rgba(139, 92, 246, 0.2);
  --arcade-cyan-light: rgba(6, 182, 212, 0.2);
  
  --badge-bg: #1E293B;
  --badge-text: #E2E8F0;
  --grid-dot-color: #1E293B;
}

/* ==========================================================================
   RESET & GLOBAL BASE STYLES
   ========================================================================== */

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

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

body {
  min-height: 100vh;
  background-color: var(--bg-canvas);
  background-image: radial-gradient(var(--grid-dot-color) 1.5px, transparent 1.5px);
  background-size: 24px 24px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

/* Retro CRT scanlines overlay option */
.crt-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9999;
  background: linear-gradient(
    rgba(18, 16, 16, 0) 50%, 
    rgba(0, 0, 0, 0.04) 50%
  );
  background-size: 100% 4px;
  opacity: 0.6;
}

/* ==========================================================================
   NEO-BRUTALIST ATOMIC UTILITIES
   ========================================================================== */

.pixel-font {
  font-family: var(--font-pixel);
  letter-spacing: -0.5px;
}

.mono-font {
  font-family: var(--font-mono);
}

.neo-box {
  background-color: var(--bg-card);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-md);
  border-radius: var(--radius-md);
  transition: transform var(--transition-snappy), box-shadow var(--transition-snappy);
}

.neo-box-interactive {
  cursor: pointer;
}

.neo-box-interactive:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lg);
}

.neo-box-interactive:active {
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-sm);
}

/* Neo-Brutalist Button */
.neo-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-primary);
  background-color: var(--bg-surface);
  border: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-md);
  border-radius: var(--radius-sm);
  cursor: pointer;
  user-select: none;
  transition: transform var(--transition-snappy), box-shadow var(--transition-snappy), background-color var(--transition-snappy);
}

.neo-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lg);
}

.neo-btn:active {
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-sm);
}

.neo-btn-primary {
  background-color: var(--arcade-amber);
  color: #121826;
}

.neo-btn-primary:hover {
  background-color: #FBBF24;
}

.neo-btn-green {
  background-color: var(--arcade-green);
  color: #FFFFFF;
}

.neo-btn-blue {
  background-color: var(--arcade-blue);
  color: #FFFFFF;
}

.neo-btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.75rem;
  box-shadow: var(--shadow-sm);
}

.neo-btn-sm:hover {
  box-shadow: var(--shadow-md);
}

.neo-btn-sm:active {
  box-shadow: 1px 1px 0px var(--shadow-color);
}

/* Neo-Brutalist Badges & Pills */
.neo-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background-color: var(--badge-bg);
  color: var(--badge-text);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-sm);
  box-shadow: 1.5px 1.5px 0px var(--shadow-color);
}

.neo-badge-amber {
  background-color: var(--arcade-amber-light);
  color: #B45309;
  border-color: #B45309;
}

.neo-badge-green {
  background-color: var(--arcade-green-light);
  color: #047857;
  border-color: #047857;
}

.neo-badge-blue {
  background-color: var(--arcade-blue-light);
  color: #0369A1;
  border-color: #0369A1;
}

.neo-badge-red {
  background-color: var(--arcade-red-light);
  color: #B91C1C;
  border-color: #B91C1C;
}

.neo-badge-purple {
  background-color: var(--arcade-purple-light);
  color: #6D28D9;
  border-color: #6D28D9;
}

/* LED Blink Indicator */
.led-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  border: 1px solid rgba(0,0,0,0.3);
}

.led-green {
  background-color: #10B981;
  box-shadow: 0 0 6px #10B981;
  animation: pulse-led 2s infinite ease-in-out;
}

.led-amber {
  background-color: #F59E0B;
  box-shadow: 0 0 6px #F59E0B;
}

.led-red {
  background-color: #EF4444;
  box-shadow: 0 0 6px #EF4444;
}

@keyframes pulse-led {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.9); }
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-canvas);
  border-left: 2px solid var(--border-color);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border: 2px solid var(--bg-canvas);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--arcade-amber);
}

/* Container */
.container {
  width: 100%;
  max-width: 1320px;
  margin-inline: auto;
  padding-inline: 1.5rem;
}

/* Focus state for a11y */
:focus-visible {
  outline: 3px solid var(--arcade-amber);
  outline-offset: 2px;
}