/* --- GLOBAL DESIGN SYSTEM TOKENS (IMPECCABLE) --- */
:root {
  /* Spacing Scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;

  /* Typography */
  --font-primary: 'Chakra Petch', sans-serif;
  --font-display: 'Chakra Petch', sans-serif;
  --font-body: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Classic Impeccable Colors (Warm Editorial) */
  --imp-primary: #CC8800; /* Amber */
  --imp-secondary: #C55221; /* Burnt Orange */
  --imp-cream: #FDFBF7; /* Soft Cream Surface */
  --imp-charcoal: #1C1917; /* Dark Ink */
  --imp-success: #16A34A;
  --imp-warning: #D97706;
  --imp-danger: #DC2626;

  /* Default Theme Mapping (Portal & Common Elements) */
  --bg-color: var(--imp-cream);
  --text-color: var(--imp-charcoal);
  --accent-color: var(--imp-secondary);
  --border-color: var(--imp-charcoal);
  --card-bg: #FFFFFF;

  /* Transition Durations */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  
  /* Layout constraints */
  --max-width: 1200px;
}

/* --- RESET & ACCESSIBILITY --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

/* Accessible Focus States */
a:focus-visible, 
button:focus-visible, 
input:focus-visible, 
select:focus-visible, 
textarea:focus-visible {
  outline: 3px solid var(--imp-primary);
  outline-offset: 3px;
}

/* Typographic Scale */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.25rem, 5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }
p { font-size: 1rem; }
small { font-size: 0.875rem; }

a {
  color: inherit;
  text-decoration: none;
  transition: all var(--transition-fast);
}

button, .btn {
  font-family: var(--font-primary);
  font-weight: 600;
  cursor: pointer;
  border: none;
  background: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

/* --- REUSABLE UTILITIES & KEYFRAMES --- */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
  width: 100%;
}

.grid {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* High contrast physical-poster border utility */
.thick-border {
  border: 4px solid var(--border-color);
}

.thin-border {
  border: 2px solid var(--border-color);
}

/* Animation Utilities */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes glitch {
  0% { transform: translate(0); }
  20% { transform: translate(-2px, 2px); }
  40% { transform: translate(-2px, -2px); }
  60% { transform: translate(2px, 2px); }
  80% { transform: translate(2px, -2px); }
  100% { transform: translate(0); }
}

@keyframes terminalPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.animate-fade-in {
  animation: fadeIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Shared theme badge utility */
.theme-badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  border-radius: 9999px;
  background-color: var(--accent-color);
  color: #FFFFFF;
}

/* Sticky Theme Selector HUD */
.theme-selector-hud {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border: 3px solid var(--imp-charcoal);
  padding: var(--space-2) var(--space-4);
  display: flex;
  gap: var(--space-2);
  align-items: center;
  z-index: 1000;
  box-shadow: 6px 6px 0px var(--imp-charcoal);
  transition: transform var(--transition-normal);
}

.theme-selector-hud.dark {
  background-color: rgba(20, 18, 16, 0.9);
  border-color: #FFB000;
  box-shadow: 6px 6px 0px #FFB000;
}

.theme-selector-hud p {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  margin-right: var(--space-2);
  text-transform: uppercase;
}

.theme-hud-btn {
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  border: 2px solid var(--imp-charcoal);
  background: var(--imp-cream);
  color: var(--imp-charcoal);
  font-weight: 600;
}

.theme-hud-btn.active {
  background-color: var(--imp-secondary);
  color: #FFFFFF;
}

/* --- DYNAMIC SECTION SHIFTS --- */
body.bg-shift-cream {
  background-color: var(--imp-cream) !important;
  color: var(--imp-charcoal) !important;
}

body.bg-shift-orange {
  background-color: var(--imp-secondary) !important;
  color: #FFFFFF !important;
}

body.bg-shift-terracotta {
  background-color: #431407 !important;
  color: #F5EBE6 !important;
}

/* --- SCROLL FADE UTILITY --- */
.scroll-fade {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.scroll-fade.active {
  opacity: 1;
  transform: translateY(0);
}