/* ==========================================================================
   Variables
   ========================================================================== */
:root {
  /* Colors - Dark Theme with Neon Accents */
  --color-bg-base: #06080D;
  --color-bg-surface: #11151F;
  --color-bg-surface-hover: #1A2130;
  
  --color-text-primary: #E2E8F0;
  --color-text-secondary: #94A3B8;
  --color-text-muted: #64748B;
  
  --color-primary: #00F0FF; /* Vibrant Cyan / Electric Blue */
  --color-primary-hover: #00D1FF;
  --color-secondary: #B026FF; /* Neon Purple */
  
  --color-success: #00E676;
  --color-warning: #FFEA00;
  --color-danger: #FF1744;
  
  --color-gray-100: #F1F5F9;
  --color-gray-300: #CBD5E1;
  --color-gray-500: #64748B;
  --color-gray-700: #334155;
  --color-gray-900: #0F172A;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: 'Rajdhani', var(--font-sans);
  
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  
  --lh-tight: 1.2;
  --lh-base: 1.5;
  --lh-relaxed: 1.625;

  /* Spacing Scale (0 - 96px) */
  --space-0: 0px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-24: 96px;

  /* Borders & Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  
  /* Shadows & Glows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --glow-primary: 0 0 10px rgba(0, 240, 255, 0.5), 0 0 20px rgba(0, 240, 255, 0.3);
  --glow-secondary: 0 0 10px rgba(176, 38, 255, 0.5), 0 0 20px rgba(176, 38, 255, 0.3);

  /* Transitions */
  --trans-fast: 150ms ease-in-out;
  --trans-base: 300ms ease-in-out;
  --trans-slow: 500ms ease-in-out;
}

/* ==========================================================================
   Reset / Normalize
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  text-rendering: optimizeSpeed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */
body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-base);
  color: var(--color-text-primary);
  font-size: var(--text-base);
  line-height: var(--lh-base);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: var(--lh-tight);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

h1 {
  font-size: var(--text-4xl);
  color: var(--color-text-primary);
  text-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
}

h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--trans-fast), text-shadow var(--trans-fast);
}

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

/* ==========================================================================
   Utilities
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.d-flex { display: flex; }
.flex-col { flex-direction: column; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.d-grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.text-center { text-align: center; }
.mt-4 { margin-top: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ==========================================================================
   Components
   ========================================================================== */
/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-6);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-base);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--trans-fast);
  background-color: transparent;
  color: var(--color-text-primary);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-bg-base);
  border-color: var(--color-primary);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

.btn-primary:hover:not(:disabled) {
  background-color: transparent;
  color: var(--color-primary);
  box-shadow: var(--glow-primary);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  filter: grayscale(100%);
}

/* Inputs */
.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-bg-base);
  border: 1px solid var(--color-gray-700);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  transition: border-color var(--trans-fast), box-shadow var(--trans-fast);
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary), var(--glow-primary);
}

/* Cards */
.card {
  background-color: var(--color-bg-surface);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  border: 1px solid var(--color-gray-900);
  box-shadow: var(--shadow-md);
  transition: transform var(--trans-base), box-shadow var(--trans-base), border-color var(--trans-base);
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(176, 38, 255, 0.4);
  box-shadow: var(--shadow-lg), var(--glow-secondary);
}

/* ==========================================================================
   Accessibility
   ========================================================================== */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}