/* --- Variables --- */
:root {
  /* Colors: Dark / Neon Retro Arcade */
  --bg-color: #050508;
  --bg-surface: #12121a;
  --text-main: #e2e8f0;
  --text-muted: #94a3b8;

  /* Brand / Neon Colors */
  --primary: #00f3ff; /* Glowing Cyan / Neon Blue */
  --accent: #bc13fe; /* Electric Purple */
  --success: #00ff66; /* Neon Green */
  --warning: #ffea00; /* Bright Yellow */
  --danger: #ff0055; /* Neon Pink / Red */

  /* Neutral Grays */
  --gray-100: #f1f5f9;
  --gray-300: #cbd5e1;
  --gray-500: #64748b;
  --gray-700: #334155;
  --gray-900: #0f172a;

  /* Typography */
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Press Start 2P', 'Orbitron', monospace, sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 3rem;
  --line-height-tight: 1.2;
  --line-height-base: 1.6;

  /* Spacing Scale (0 - 96px) */
  --space-0: 0;
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-6: 1.5rem;   /* 24px */
  --space-8: 2rem;     /* 32px */
  --space-12: 3rem;    /* 48px */
  --space-16: 4rem;    /* 64px */
  --space-24: 6rem;    /* 96px */

  /* Borders & Shadows */
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --shadow-neon-primary: 0 0 10px rgba(0, 243, 255, 0.5), 0 0 20px rgba(0, 243, 255, 0.3);
  --shadow-neon-accent: 0 0 10px rgba(188, 19, 254, 0.5), 0 0 20px rgba(188, 19, 254, 0.3);
  --shadow-neon-warning: 0 0 10px rgba(255, 234, 0, 0.5), 0 0 20px rgba(255, 234, 0, 0.3);
  --shadow-dark: 0 10px 30px rgba(0,0,0,0.8);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
}

/* --- Reset / Normalize --- */
*, *::before, *::after {
  box-sizing: border-box;
}
* {
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

/* --- Base Styles --- */
body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--text-main);
  background-color: var(--bg-color);
  /* Subtle arcade grid background */
  background-image: linear-gradient(rgba(0, 243, 255, 0.03) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(0, 243, 255, 0.03) 1px, transparent 1px);
  background-size: 30px 30px;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-4);
  color: var(--text-main);
  text-transform: uppercase;
  letter-spacing: 1px;
}

h1 {
  font-size: var(--font-size-3xl);
  text-shadow: var(--shadow-neon-primary);
  color: var(--primary);
}

h2 {
  font-size: var(--font-size-2xl);
  text-shadow: var(--shadow-neon-accent);
  color: var(--accent);
}

h3 {
  font-size: var(--font-size-xl);
  color: var(--warning);
}

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

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

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

/* --- Utilities --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-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); }

.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 768px) {
  .grid-cols-2, .grid-cols-3 { grid-template-columns: repeat(1, 1fr); }
}

.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;
}

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

/* --- Components --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  color: var(--bg-color);
  background-color: var(--primary);
  border: 2px solid var(--primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: var(--shadow-neon-primary);
  transition: all var(--transition-base);
}

.btn:hover, .btn:focus-visible {
  background-color: transparent;
  color: var(--primary);
  box-shadow: 0 0 15px rgba(0, 243, 255, 0.8), inset 0 0 10px rgba(0, 243, 255, 0.5);
}

.btn:disabled {
  background-color: var(--gray-700);
  border-color: var(--gray-700);
  color: var(--gray-500);
  cursor: not-allowed;
  box-shadow: none;
}

.btn-secondary {
  background-color: transparent;
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: var(--shadow-neon-accent);
}

.btn-secondary:hover, .btn-secondary:focus-visible {
  background-color: var(--accent);
  color: var(--bg-color);
  box-shadow: 0 0 15px rgba(188, 19, 254, 0.8);
}

.input, .textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--text-main);
  background-color: var(--bg-surface);
  border: 1px solid var(--gray-700);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input:focus, .textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 8px rgba(0, 243, 255, 0.5);
}

.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--gray-900);
  border-top: 3px solid var(--primary);
  padding: var(--space-6);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-dark);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-neon-primary);
  border-color: var(--primary);
}

/* --- Accessibility --- */
:focus-visible {
  outline: 2px dashed var(--warning);
  outline-offset: 4px;
}

@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;
  }
}