@tailwind base;
@tailwind components;
@tailwind utilities;

/* ===== CSS Custom Properties ===== */
:root {
  /* Light mode */
  --background: 255 255 255;
  --foreground: 10 10 10;
  --primary: 0 0 0;
  --primary-foreground: 255 255 255;
  --muted: 245 245 245;
  --muted-foreground: 115 115 115;
  --border: 229 229 229;
  --card: 255 255 255;
  --card-foreground: 10 10 10;
  /* Legacy cyber colors - mapped to monochrome */
  --cyber-green: #ffffff;
  --cyber-blue: #a3a3a3;
  --cyber-purple: #737373;
  --cyber-pink: #525252;
}

.dark, html:not(.light) {
  --background: 0 0 0;
  --foreground: 250 250 250;
  --primary: 255 255 255;
  --primary-foreground: 0 0 0;
  --muted: 23 23 23;
  --muted-foreground: 163 163 163;
  --border: 38 38 38;
  --card: 10 10 10;
  --card-foreground: 250 250 250;
  --cyber-green: #ffffff;
  --cyber-blue: #a3a3a3;
  --cyber-purple: #737373;
  --cyber-pink: #525252;
  /* Accessible text colors (WCAG AA compliant) */
  --text-primary: #ffffff;
  --text-secondary: #d4d4d4; /* neutral-300, better contrast than neutral-400 */
  --text-tertiary: #a3a3a3;  /* neutral-400 */
  --text-muted: #737373;     /* neutral-500 */
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

/* Respect user preference for reduced motion */
@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;
  }
}

/* Screen reader only utility */
.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;
}

.sr-only:focus,
.not-sr-only {
  position: static;
  width: auto;
  height: auto;
  padding: 0;
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* Focus visible for keyboard navigation */
.focus-visible:focus {
  outline: 2px solid white;
  outline-offset: 2px;
}

/* High contrast focus indicator */
@media (prefers-contrast: high) {
  :focus {
    outline: 3px solid currentColor;
    outline-offset: 3px;
  }
}

body {
  background: #000000;
  color: #fafafa;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html.light body {
  background: #ffffff;
  color: #0a0a0a;
}

/* ===== Typography ===== */
.text-display {
  font-size: clamp(2.5rem, 8vw, 5rem);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.text-headline {
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.text-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.3;
  font-weight: 600;
}

.text-body-lg {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  line-height: 1.6;
}

/* ===== Scrollbar styling ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: #0a0a0a;
}

::-webkit-scrollbar-thumb {
  background: #404040;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #525252;
}

html.light ::-webkit-scrollbar-track {
  background: #f5f5f5;
}

html.light ::-webkit-scrollbar-thumb {
  background: #d4d4d4;
}

html.light ::-webkit-scrollbar-thumb:hover {
  background: #a3a3a3;
}

/* ===== Glass Card Effect ===== */
@layer utilities {
  .glass {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
  }

  html.light .glass {
    background: rgba(0, 0, 0, 0.02);
    border: 1px solid rgba(0, 0, 0, 0.08);
  }

  .glass-strong {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  /* Grid Background */
  .bg-grid {
    background-image: 
      linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
      linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 40px 40px;
  }

  html.light .bg-grid {
    background-image: 
      linear-gradient(to right, rgba(0, 0, 0, 0.03) 1px, transparent 1px),
      linear-gradient(to bottom, rgba(0, 0, 0, 0.03) 1px, transparent 1px);
  }

  /* Dots Background */
  .bg-dots {
    background-image: radial-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px);
    background-size: 20px 20px;
  }

  html.light .bg-dots {
    background-image: radial-gradient(rgba(0, 0, 0, 0.08) 1px, transparent 1px);
  }
}

/* Legacy grid-bg mapped to new bg-grid */
.grid-bg {
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* ===== Terminal styling ===== */
.terminal {
  background: #0a0a0a;
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 13px;
  line-height: 1.6;
  border: 1px solid #262626;
  border-radius: 0.75rem;
}

html.light .terminal {
  background: #fafafa;
  border-color: #e5e5e5;
}

.terminal-line {
  animation: fadeInLine 0.1s ease-out forwards;
  opacity: 0;
}

@keyframes fadeInLine {
  to { opacity: 1; }
}

/* Syntax highlighting - monochrome */
.syntax-property { color: #e5e5e5; }
.syntax-string { color: #a3a3a3; }
.syntax-number { color: #737373; }
.syntax-keyword { color: #fafafa; font-weight: 500; }
.syntax-comment { color: #525252; font-style: italic; }
.syntax-function { color: #fafafa; }
.syntax-punctuation { color: #737373; }

html.light .syntax-property { color: #171717; }
html.light .syntax-string { color: #525252; }
html.light .syntax-number { color: #737373; }
html.light .syntax-keyword { color: #0a0a0a; font-weight: 500; }
html.light .syntax-comment { color: #a3a3a3; font-style: italic; }
html.light .syntax-function { color: #0a0a0a; }
html.light .syntax-punctuation { color: #737373; }

/* ===== Card styling ===== */
.card-lift {
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card-lift:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  border-color: #404040;
}

html.light .card-lift:hover {
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
  border-color: #d4d4d4;
}

/* ===== Button styles ===== */
.btn-primary {
  background: #ffffff;
  color: #000000;
  font-weight: 600;
  transition: all 0.2s ease;
  border-radius: 0.75rem;
}

.btn-primary:hover {
  background: #e5e5e5;
  transform: translateY(-1px);
}

html.light .btn-primary {
  background: #000000;
  color: #ffffff;
}

html.light .btn-primary:hover {
  background: #171717;
}

.btn-secondary {
  background: transparent;
  color: #fafafa;
  border: 1px solid #404040;
  font-weight: 500;
  transition: all 0.2s ease;
  border-radius: 0.75rem;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: #525252;
}

html.light .btn-secondary {
  color: #0a0a0a;
  border-color: #d4d4d4;
}

html.light .btn-secondary:hover {
  background: rgba(0, 0, 0, 0.03);
  border-color: #a3a3a3;
}

/* ===== Badge styles ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #a3a3a3;
}

html.light .badge {
  background: rgba(0, 0, 0, 0.03);
  border-color: rgba(0, 0, 0, 0.1);
  color: #525252;
}

/* ===== Gradient text - monochrome ===== */
.gradient-text {
  background: linear-gradient(135deg, #ffffff 0%, #737373 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

html.light .gradient-text {
  background: linear-gradient(135deg, #000000 0%, #737373 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

/* ===== Step number badge ===== */
.step-badge {
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 700;
  background: #ffffff;
  color: #000000;
}

html.light .step-badge {
  background: #000000;
  color: #ffffff;
}

/* ===== Timeline line ===== */
.timeline-line {
  background: linear-gradient(180deg, #404040 0%, #171717 100%);
}

html.light .timeline-line {
  background: linear-gradient(180deg, #d4d4d4 0%, #e5e5e5 100%);
}

/* ===== Section divider ===== */
.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, #262626 50%, transparent 100%);
}

html.light .section-divider {
  background: linear-gradient(90deg, transparent 0%, #e5e5e5 50%, transparent 100%);
}

/* ===== Keep cyber-button for compatibility ===== */
.cyber-button {
  position: relative;
  overflow: hidden;
  transition: all 0.2s ease;
}

.cyber-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
  transition: left 0.5s ease;
}

.cyber-button:hover::before {
  left: 100%;
}

/* ===== Mobile-First Utilities ===== */
@layer utilities {
  /* Touch-friendly tap targets - minimum 44px */
  .tap-target {
    min-height: 44px;
    min-width: 44px;
  }

  /* Scrollbar thin variant for mobile */
  .scrollbar-thin::-webkit-scrollbar {
    width: 4px;
    height: 4px;
  }

  .scrollbar-thin::-webkit-scrollbar-thumb {
    background: #404040;
    border-radius: 2px;
  }

  /* Hide scrollbar but allow scroll */
  .scrollbar-hidden {
    -ms-overflow-style: none;
    scrollbar-width: none;
  }
  
  .scrollbar-hidden::-webkit-scrollbar {
    display: none;
  }

  /* Safe area padding for mobile devices */
  .safe-area-inset-bottom {
    padding-bottom: env(safe-area-inset-bottom, 0);
  }

  .safe-area-inset-top {
    padding-top: env(safe-area-inset-top, 0);
  }
}

/* ===== Mobile Breakpoint Adjustments ===== */
@media (max-width: 640px) {
  /* Ensure minimum font size for readability */
  body {
    font-size: 16px; /* Prevents zoom on iOS */
  }

  /* Prevent horizontal overflow */
  html, body {
    overflow-x: hidden;
    max-width: 100vw;
  }

  /* Larger touch targets on mobile */
  button, a, input, select, textarea {
    min-height: 44px;
  }

  /* Better tap area for links in text */
  p a, li a {
    padding: 0.25rem 0;
  }

  /* Full-width form elements */
  input[type="text"],
  input[type="url"],
  input[type="email"],
  select {
    width: 100%;
  }

  /* Terminal adjustments for mobile */
  .terminal {
    font-size: 12px;
    padding: 0.75rem;
  }
}

/* ===== Accessibility Improvements ===== */

/* Focus ring for keyboard navigation */
:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
}

/* Remove focus ring for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}

/* High contrast focus for better visibility */
.focus-ring-white:focus-visible {
  outline: 2px solid white;
  outline-offset: 2px;
}

html.light :focus-visible {
  outline: 2px solid rgba(0, 0, 0, 0.5);
}

/* Reduce motion for users who prefer it */
@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;
  }
}

/* Screen reader only content */
.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;
}

/* Skip to content link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: white;
  color: black;
  padding: 8px 16px;
  z-index: 100;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
}

/* Ensure interactive elements are visually distinct */
button:disabled,
input:disabled,
select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .border-neutral-700 {
    border-color: #737373;
  }
  
  .border-neutral-800 {
    border-color: #525252;
  }
  
  .text-neutral-400 {
    color: #a3a3a3;
  }
  
  .text-neutral-500 {
    color: #a3a3a3;
  }
}

/* ===== Selection styling ===== */
::selection {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

html.light ::selection {
  background: rgba(0, 0, 0, 0.2);
  color: black;
}

/* ===== Print styles ===== */
@media print {
  body {
    background: white !important;
    color: black !important;
  }
  
  .no-print {
    display: none !important;
  }
}