/* ============================================
   CSS Custom Properties
   ============================================ */
:root {
  /* Colors - Neutrals with High-Contrast CTAs */
  --color-background: #0f0f0f;
  --color-surface: #1a1a1a;
  --color-surface-elevated: #252525;
  --color-text-primary: #f5f5f5;
  --color-text-secondary: #b0b0b0;
  --color-text-muted: #707070;

  /* High-Contrast CTA Colors */
  --color-cta-primary: #00ff88;
  --color-cta-primary-hover: #00cc6e;
  --color-cta-secondary: #0088ff;

  /* Accent Colors */
  --color-accent: #ff0080;
  --color-accent-glow: rgba(255, 0, 128, 0.3);
  --color-highlight: rgba(0, 255, 136, 0.1);

  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-heading: "SF Pro Display", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Container */
  --container-max-width: 900px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.4s ease;
  --transition-slow: 0.6s ease;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px var(--color-accent-glow);
}

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

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-background);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Hero Section - High Impact Entry
   ============================================ */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 50%, #0f0f0f 100%);
  overflow: hidden;
  transition: transform 0.1s ease-out, opacity 0.3s ease-out;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(0, 255, 136, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 0, 128, 0.05) 0%, transparent 50%);
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.hero-content {
  text-align: center;
  max-width: 1000px;
  padding: var(--spacing-md);
  position: relative;
  z-index: 1;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-sm);
  background: linear-gradient(135deg, var(--color-cta-primary) 0%, var(--color-cta-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: glow 3s ease-in-out infinite;
}

@keyframes glow {
  0%, 100% { filter: drop-shadow(0 0 10px rgba(0, 255, 136, 0.3)); }
  50% { filter: drop-shadow(0 0 20px rgba(0, 255, 136, 0.6)); }
}

.hero-subtitle {
  font-size: clamp(1.25rem, 3vw, 2rem);
  font-weight: 300;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.4;
}

.hero-hook {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto var(--spacing-lg);
  line-height: 1.6;
}

/* Animation classes */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Scroll Indicator */
.scroll-indicator {
  margin-top: var(--spacing-lg);
  cursor: pointer;
  transition: transform var(--transition-normal);
}

.scroll-indicator:hover {
  transform: translateY(5px);
}

.scroll-arrow {
  width: 30px;
  height: 50px;
  border: 2px solid var(--color-cta-primary);
  border-radius: 20px;
  margin: 0 auto;
  position: relative;
}

.scroll-arrow::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-cta-primary);
  animation: scrollDown 2s infinite;
}

@keyframes scrollDown {
  0% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }
}

/* ============================================
   Article Content
   ============================================ */
.article-content {
  background-color: var(--color-background);
  position: relative;
  z-index: 2;
}

.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

/* Scroll-triggered reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  position: relative;
  padding-left: var(--spacing-sm);
  border-left: 4px solid var(--color-cta-primary);
  transition: border-color var(--transition-fast);
}

h2:hover {
  border-left-color: var(--color-accent);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--color-cta-primary);
  margin-top: var(--spacing-md);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

p:hover {
  color: var(--color-text-primary);
}

/* Special text styles with micro-interactions */
.highlight-text {
  background: var(--color-highlight);
  border-left: 3px solid var(--color-cta-primary);
  padding: var(--spacing-md);
  margin: var(--spacing-md) 0;
  border-radius: 4px;
  font-style: italic;
  transition: all var(--transition-normal);
}

.highlight-text:hover {
  background: rgba(0, 255, 136, 0.15);
  transform: translateX(5px);
  box-shadow: var(--shadow-md);
}

.callout-text {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-cta-primary);
  text-align: center;
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md);
  background: rgba(0, 255, 136, 0.05);
  border-radius: 8px;
  transition: all var(--transition-normal);
}

.callout-text:hover {
  background: rgba(0, 255, 136, 0.1);
  transform: scale(1.02);
  box-shadow: 0 0 30px rgba(0, 255, 136, 0.2);
}

.final-cta-text {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: var(--spacing-lg) 0 var(--spacing-md);
}

.question-text {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-cta-primary);
  font-style: italic;
  text-align: center;
  margin: var(--spacing-lg) 0;
}

/* Lists with hover effects */
ul, ol {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-lg);
}

li {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  padding-left: var(--spacing-xs);
}

li:hover {
  color: var(--color-text-primary);
  transform: translateX(5px);
}

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

ol li::marker {
  color: var(--color-cta-primary);
  font-weight: 700;
}

/* Sections */
.content-section {
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-md);
  border-radius: 8px;
  transition: background-color var(--transition-normal);
}

.content-section:hover {
  background-color: var(--color-surface);
}

.intro-section {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  padding: var(--spacing-lg);
  background: var(--color-surface);
  border-radius: 12px;
  margin-bottom: var(--spacing-xl);
  border: 1px solid rgba(0, 255, 136, 0.1);
  transition: all var(--transition-normal);
}

.intro-section:hover {
  border-color: rgba(0, 255, 136, 0.3);
  box-shadow: 0 0 30px rgba(0, 255, 136, 0.1);
}

/* ============================================
   Call-to-Action Section
   ============================================ */
.cta-section {
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-elevated) 100%);
  padding: var(--spacing-xl) var(--spacing-md);
  margin-top: var(--spacing-xl);
  border-top: 2px solid var(--color-cta-primary);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 50%, rgba(0, 255, 136, 0.05) 0%, transparent 70%);
  animation: pulse 6s ease-in-out infinite;
}

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

.cta-content {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.cta-image-wrapper {
  position: relative;
}

.cta-image {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  border: 4px solid var(--color-cta-primary);
  box-shadow: 0 0 40px rgba(0, 255, 136, 0.4);
  transition: all var(--transition-normal);
  object-fit: cover;
}

.cta-image:hover {
  transform: scale(1.05) rotate(2deg);
  box-shadow: 0 0 60px rgba(0, 255, 136, 0.6);
}

.cta-text {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.cta-title {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--color-text-primary);
  margin: 0;
  font-weight: 800;
}

.cta-description {
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin: 0;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-cta-primary);
  color: var(--color-background);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.125rem;
  border-radius: 50px;
  transition: all var(--transition-normal);
  box-shadow: 0 4px 20px rgba(0, 255, 136, 0.3);
  border: 2px solid transparent;
  align-self: flex-start;
}

.cta-button:hover {
  background: var(--color-cta-primary-hover);
  transform: translateX(5px);
  box-shadow: 0 6px 30px rgba(0, 255, 136, 0.5);
  border-color: var(--color-cta-primary);
}

.cta-button:active {
  transform: translateX(5px) scale(0.98);
}

.cta-arrow {
  transition: transform var(--transition-fast);
}

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

/* ============================================
   Footer
   ============================================ */
.site-footer {
  background-color: var(--color-background);
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.site-footer p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin: 0;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
  :root {
    --spacing-xl: 4rem;
    --spacing-lg: 3rem;
  }

  .hero-title {
    font-size: clamp(2.5rem, 10vw, 4rem);
  }

  .hero-subtitle {
    font-size: clamp(1.125rem, 4vw, 1.5rem);
  }

  .hero-hook {
    font-size: 1.125rem;
  }

  .cta-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-md);
  }

  .cta-image-wrapper {
    margin: 0 auto;
  }

  .cta-image {
    width: 150px;
    height: 150px;
  }

  .cta-button {
    align-self: center;
  }

  h2 {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
  }

  h3 {
    font-size: clamp(1.25rem, 4vw, 1.75rem);
  }

  .callout-text {
    font-size: 1.125rem;
  }

  .final-cta-text {
    font-size: 1.25rem;
  }

  .question-text {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 1rem;
  }

  .container {
    padding: var(--spacing-lg) var(--spacing-sm);
  }

  .content-section {
    padding: var(--spacing-sm);
  }

  .intro-section {
    padding: var(--spacing-md);
  }

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

  ul, ol {
    padding-left: var(--spacing-md);
  }
}

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

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

  .article-content {
    background-color: white;
  }

  h2 {
    border-left-color: black;
  }

  .highlight-text {
    background: #f0f0f0;
    border-left-color: black;
  }

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

/* ============================================
   Accessibility Enhancements
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus {
  outline: 2px solid var(--color-cta-primary);
  outline-offset: 4px;
}

/* Selection styles */
::selection {
  background-color: var(--color-cta-primary);
  color: var(--color-background);
}

::-moz-selection {
  background-color: var(--color-cta-primary);
  color: var(--color-background);
}