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

/* CSS Custom Properties */
:root {
  /* Colors */
  --color-background: #121212;
  --color-surface: #1E1E1E;
  --color-surface-elevated: #2A2A2A;
  --color-text-primary: #E0E0E0;
  --color-text-secondary: #B0B0B0;
  --color-accent: #6C63FF;
  --color-accent-hover: #5A52D5;
  --color-accent-glow: rgba(108, 99, 255, 0.15);
  --color-quote-border: #6C63FF;
  --color-quote-bg: rgba(108, 99, 255, 0.05);
  --color-shadow: rgba(0, 0, 0, 0.5);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-size-base: 18px;
  --font-size-small: 16px;
  --font-size-large: 20px;
  --line-height-base: 1.7;
  --line-height-heading: 1.3;

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

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

  /* Border Radius */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
}

/* Smooth Scrolling */
html {
  scroll-behavior: smooth;
}

/* Body Styles */
body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f172a 100%);
  padding: var(--spacing-xl) 0;
  text-align: center;
  box-shadow: 0 4px 20px var(--color-shadow);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 50%, rgba(108, 99, 255, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: var(--line-height-heading);
  margin-bottom: var(--spacing-md);
  color: #FFFFFF;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto;
  font-weight: 400;
}

/* Article Content */
.article-content {
  padding: var(--spacing-xl) 0;
}

.article-content article {
  background-color: var(--color-surface);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 8px 30px var(--color-shadow);
}

/* Section Spacing */
section {
  margin-bottom: var(--spacing-xl);
}

section:last-child {
  margin-bottom: 0;
}

.intro {
  font-size: var(--font-size-large);
  color: var(--color-text-secondary);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-surface-elevated);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: var(--line-height-heading);
  color: #FFFFFF;
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-accent);
}

h3 {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  margin-top: var(--spacing-lg);
}

h4 {
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  margin-top: var(--spacing-md);
}

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

p:last-child {
  margin-bottom: 0;
}

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

li {
  margin-bottom: var(--spacing-sm);
}

li:last-child {
  margin-bottom: 0;
}

/* Blockquotes */
blockquote {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md) var(--spacing-lg);
  border-left: 4px solid var(--color-quote-border);
  background-color: var(--color-quote-bg);
  border-radius: var(--border-radius-md);
  font-style: italic;
}

blockquote p {
  color: var(--color-text-primary);
  font-size: var(--font-size-large);
  margin-bottom: 0;
}

/* Code Blocks */
code {
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  background-color: var(--color-surface-elevated);
  padding: 0.2em 0.4em;
  border-radius: var(--border-radius-sm);
  font-size: 0.9em;
  color: #F8F8F2;
}

pre {
  background-color: var(--color-surface-elevated);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

pre code {
  background-color: transparent;
  padding: 0;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-md);
  background-color: var(--color-surface-elevated);
  border-radius: var(--border-radius-md);
  overflow: hidden;
}

th, td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--color-background);
}

th {
  background-color: var(--color-accent);
  color: #FFFFFF;
  font-weight: 600;
}

tr:last-child td {
  border-bottom: none;
}

/* Images */
img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--border-radius-md);
}

/* Call-to-Action Section */
.cta-section {
  background: linear-gradient(135deg, #16213e 0%, #1a1a2e 50%, #0f172a 100%);
  padding: var(--spacing-xl) 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 50%, rgba(108, 99, 255, 0.15) 0%, transparent 60%);
  pointer-events: none;
}

.cta-card {
  background-color: var(--color-surface);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  box-shadow: 0 10px 40px var(--color-shadow);
  display: grid;
  gap: var(--spacing-lg);
  align-items: center;
  position: relative;
  z-index: 1;
}

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

.cta-image img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--color-accent);
  box-shadow: 0 0 20px var(--color-accent-glow);
  margin: 0 auto;
}

.cta-content h2 {
  font-size: clamp(2rem, 3vw, 2.8rem);
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  border-bottom: none;
  text-align: center;
}

.cta-description {
  font-size: var(--font-size-large);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.cta-tagline {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.cta-button {
  display: inline-block;
  background-color: var(--color-accent);
  color: #FFFFFF;
  text-decoration: none;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--border-radius-md);
  font-weight: 600;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px var(--color-accent-glow);
  text-align: center;
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
}

.cta-button:hover {
  background-color: var(--color-accent-hover);
  box-shadow: 0 6px 25px rgba(108, 99, 255, 0.3);
  transform: translateY(-2px);
}

.cta-button:active {
  transform: translateY(0);
}

/* Footer */
.site-footer {
  background-color: var(--color-background);
  padding: var(--spacing-lg) 0;
  text-align: center;
  border-top: 1px solid var(--color-surface);
}

.site-footer p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
  margin: 0;
}

/* Responsive Design */
@media (min-width: 768px) {
  .cta-card {
    grid-template-columns: auto 1fr;
    text-align: left;
  }

  .cta-image {
    text-align: left;
  }

  .cta-image img {
    margin: 0;
  }

  .cta-content h2,
  .cta-description,
  .cta-tagline {
    text-align: left;
  }

  .cta-button {
    width: auto;
    margin: 0;
  }
}

@media (min-width: 1024px) {
  :root {
    --font-size-base: 19px;
    --font-size-large: 21px;
  }

  .article-content article {
    padding: var(--spacing-xl) calc(var(--spacing-xl) * 1.5);
  }
}

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

  .hero {
    background: white;
    color: black;
    box-shadow: none;
  }

  .hero-title,
  h1, h2, h3, h4, h5, h6 {
    color: black;
  }

  .article-content article {
    background-color: white;
    box-shadow: none;
  }

  .cta-section {
    background: white;
    page-break-before: always;
  }

  .cta-card {
    box-shadow: none;
    border: 1px solid #ccc;
  }

  .cta-button {
    display: none;
  }

  .site-footer {
    border-top: 1px solid #ccc;
  }

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

  a[href]:after {
    content: " (" attr(href) ")";
  }
}