/* ===========================
   CSS Custom Properties
   =========================== */
:root {
  /* Colors - Neutrals with High-Contrast CTAs */
  --color-bg-primary: #0f0f0f;
  --color-bg-secondary: #1a1a1a;
  --color-bg-tertiary: #242424;
  --color-text-primary: #f5f5f5;
  --color-text-secondary: #b0b0b0;
  --color-text-muted: #808080;
  --color-accent-primary: #00ff88;
  --color-accent-secondary: #00ccff;
  --color-accent-tertiary: #ff00ff;
  --color-border: #333333;
  --color-code-bg: #1e1e1e;
  --color-shadow: rgba(0, 255, 136, 0.15);

  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Cascadia Code', 'Roboto Mono', 'Courier New', monospace;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;

  /* Layout */
  --max-width-content: 900px;
  --max-width-wide: 1200px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ===========================
   CSS Reset & Base Styles
   =========================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===========================
   Scroll Progress Indicator
   =========================== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
  z-index: 9999;
  transition: width 0.1s ease-out;
  box-shadow: 0 0 20px var(--color-shadow);
}

/* ===========================
   Hero Section
   =========================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, var(--color-accent-primary) 0%, transparent 50%);
  opacity: 0.03;
  animation: rotate 30s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hero-decoration {
  position: absolute;
  top: 20%;
  right: 10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle at center, var(--color-accent-secondary) 0%, transparent 70%);
  opacity: 0.08;
  border-radius: 50%;
  filter: blur(80px);
  animation: float 8s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.1); }
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 900px;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.hero-content.visible {
  opacity: 1;
  transform: translateY(0);
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 40px var(--color-shadow);
  animation: glow 3s ease-in-out infinite alternate;
}

@keyframes glow {
  from { filter: drop-shadow(0 0 20px var(--color-shadow)); }
  to { filter: drop-shadow(0 0 40px var(--color-shadow)); }
}

.hero-subtitle {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  font-weight: 300;
}

.hero-tagline {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  font-size: 1.125rem;
  transition: all var(--transition-base);
}

.hero-tagline:hover {
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 30px var(--color-shadow);
  transform: translateY(-2px);
}

.tagline-icon {
  font-size: 1.5rem;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}

/* ===========================
   Content Wrapper
   =========================== */
.content-wrapper {
  position: relative;
  background: var(--color-bg-primary);
  z-index: 1;
}

/* ===========================
   Article Content
   =========================== */
.article-content {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
}

.content-section {
  margin-bottom: var(--spacing-xl);
}

.intro-section {
  margin-bottom: var(--spacing-xl);
}

.lead-text {
  font-size: 1.35rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  font-weight: 300;
}

/* Scroll Reveal Animation */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.scroll-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===========================
   Typography
   =========================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

h2 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  margin-top: var(--spacing-xl);
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  padding-bottom: var(--spacing-sm);
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent-primary), transparent);
  animation: expand 0.5s ease-out;
}

@keyframes expand {
  from { width: 0; }
  to { width: 60px; }
}

h3 {
  font-size: clamp(1.5rem, 3vw, 1.875rem);
  margin-top: var(--spacing-lg);
  color: var(--color-accent-primary);
}

h4 {
  font-size: 1.35rem;
  margin-top: var(--spacing-md);
  color: var(--color-text-primary);
}

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--color-accent-primary);
  text-decoration: none;
  position: relative;
  transition: color var(--transition-fast);
}

a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent-primary);
  transition: width var(--transition-base);
}

a:hover {
  color: var(--color-accent-secondary);
}

a:hover::after {
  width: 100%;
}

/* ===========================
   Code Blocks
   =========================== */
pre {
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--spacing-md);
  margin: var(--spacing-md) 0;
  overflow-x: auto;
  transition: all var(--transition-base);
  position: relative;
}

pre:hover {
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 20px var(--color-shadow);
  transform: translateY(-2px);
}

code {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-text-primary);
  line-height: 1.6;
}

pre code {
  display: block;
  cursor: pointer;
}

pre code.pulse {
  animation: code-pulse 0.6s ease-out;
}

@keyframes code-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.02); }
}

p code {
  background: var(--color-code-bg);
  padding: 0.2em 0.5em;
  border-radius: 4px;
  font-size: 0.9em;
  border: 1px solid var(--color-border);
}

/* ===========================
   Lists
   =========================== */
ul, ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

li {
  margin-bottom: var(--spacing-xs);
  position: relative;
}

li::marker {
  color: var(--color-accent-primary);
}

/* ===========================
   Comparison Box
   =========================== */
.comparison-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.comparison-traditional,
.comparison-cli {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: var(--spacing-md);
  transition: all var(--transition-base);
}

.comparison-traditional:hover,
.comparison-cli:hover {
  border-color: var(--color-accent-primary);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px var(--color-shadow);
}

.comparison-traditional h4,
.comparison-cli h4 {
  color: var(--color-accent-secondary);
  margin-bottom: var(--spacing-sm);
}

.comparison-note {
  margin-top: var(--spacing-sm);
  font-style: italic;
  color: var(--color-accent-primary);
}

/* ===========================
   Highlight Box
   =========================== */
.highlight-box {
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  border-left: 4px solid var(--color-accent-primary);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  border-radius: 8px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.highlight-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent-primary) 0%, transparent 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.highlight-box:hover::before {
  opacity: 0.05;
}

.highlight-text {
  font-size: 1.25rem;
  font-style: italic;
  color: var(--color-text-secondary);
  margin: 0;
}

/* ===========================
   Tool Cards
   =========================== */
.tool-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: var(--spacing-md);
  margin: var(--spacing-md) 0;
  transition: all var(--transition-base);
}

.tool-card:hover {
  border-color: var(--color-accent-primary);
  box-shadow: 0 10px 30px var(--color-shadow);
  transform: translateY(-4px);
}

.tool-card h4 {
  color: var(--color-accent-primary);
  margin-bottom: var(--spacing-sm);
}

/* ===========================
   Responsibility Grid
   =========================== */
.responsibility-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.responsibility-human,
.responsibility-ai {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: var(--spacing-md);
  transition: all var(--transition-base);
}

.responsibility-human {
  border-left: 4px solid var(--color-accent-primary);
}

.responsibility-ai {
  border-left: 4px solid var(--color-accent-secondary);
}

.responsibility-human:hover,
.responsibility-ai:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px var(--color-shadow);
}

/* ===========================
   Starting Points
   =========================== */
.starting-points {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.starting-point {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: var(--spacing-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.starting-point::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background: var(--color-accent-primary);
  transition: height var(--transition-base);
}

.starting-point:hover::before {
  height: 100%;
}

.starting-point:hover {
  border-color: var(--color-accent-primary);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px var(--color-shadow);
}

.starting-point h4 {
  color: var(--color-accent-secondary);
  margin-bottom: var(--spacing-xs);
  font-size: 1.125rem;
}

.starting-point p {
  margin: 0;
  color: var(--color-text-secondary);
}

/* ===========================
   Closing Statement
   =========================== */
.closing-statement {
  font-size: 1.35rem;
  font-weight: 500;
  text-align: center;
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  border-radius: 12px;
  margin-top: var(--spacing-xl);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.closing-statement:hover {
  border-color: var(--color-accent-primary);
  box-shadow: 0 10px 30px var(--color-shadow);
}

/* ===========================
   CTA Section
   =========================== */
.cta-section {
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  padding: var(--spacing-xl) var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle at center, var(--color-accent-primary) 0%, transparent 70%);
  opacity: 0.05;
  animation: float 10s ease-in-out infinite;
}

.cta-content {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.cta-profile {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.cta-photo {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  border: 4px solid var(--color-accent-primary);
  box-shadow: 0 0 40px var(--color-shadow);
  transition: all var(--transition-bounce);
}

.cta-photo:hover {
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 0 60px var(--color-shadow);
}

.cta-info {
  flex: 1;
  min-width: 300px;
}

.cta-name {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-xs);
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta-title {
  font-size: 1.25rem;
  color: var(--color-accent-secondary);
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
}

.cta-description {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.cta-action {
  text-align: center;
}

.cta-tagline {
  font-size: 1.5rem;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
  font-weight: 300;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  color: var(--color-bg-primary);
  font-size: 1.25rem;
  font-weight: 700;
  border-radius: 50px;
  text-decoration: none;
  transition: all var(--transition-base);
  box-shadow: 0 10px 30px var(--color-shadow);
  position: relative;
  overflow: hidden;
}

.cta-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left var(--transition-slow);
}

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

.cta-button:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 20px 50px var(--color-shadow);
}

.cta-button::after {
  display: none;
}

.button-arrow {
  font-size: 1.5rem;
  transition: transform var(--transition-base);
}

.cta-button:hover .button-arrow {
  transform: translateX(5px);
}

/* ===========================
   Footer
   =========================== */
.site-footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg);
  text-align: center;
  color: var(--color-text-muted);
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
  .comparison-box {
    grid-template-columns: 1fr;
  }

  .responsibility-grid {
    grid-template-columns: 1fr;
  }

  .starting-points {
    grid-template-columns: 1fr;
  }

  .cta-profile {
    flex-direction: column;
    text-align: center;
  }

  .cta-photo {
    width: 120px;
    height: 120px;
  }

  h2 {
    font-size: 2rem;
  }

  .hero-title {
    font-size: 2.5rem;
  }
}

@media (max-width: 480px) {
  .article-content {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  pre {
    padding: var(--spacing-sm);
  }

  code {
    font-size: 0.85rem;
  }

  .cta-button {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1.125rem;
  }
}

/* ===========================
   Print Styles
   =========================== */
@media print {
  body {
    background: white;
    color: black;
  }

  .scroll-progress,
  .hero-decoration,
  .cta-section,
  .site-footer {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: var(--spacing-md);
  }

  .hero-title {
    color: black;
    -webkit-text-fill-color: black;
  }

  a {
    color: black;
    text-decoration: underline;
  }

  pre {
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }
}