/* Design System - Portfolio Website */

/* CSS Variables */
:root {
  /* Colors */
  --color-primary: #1a1a2e;
  --color-primary-light: #2d2d44;
  --color-accent: #c97d60;
  --color-accent-light: #e8a87c;
  --color-neutral-light: #f5f5f5;
  --color-neutral: #e0e0e0;
  --color-neutral-dark: #888;
  --color-text: #2c2c2c;
  --color-text-light: #666;
  --color-white: #ffffff;
  
  /* Typography */
  --font-heading: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', 'Consolas', monospace;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* Layout */
  --max-width: 1200px;
  --max-width-content: 800px;
  --border-radius: 8px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  line-height: 1.6;
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

h1 {
  font-size: 3rem;
  font-weight: 700;
}

h2 {
  font-size: 2.25rem;
}

h3 {
  font-size: 1.75rem;
}

h4 {
  font-size: 1.5rem;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: var(--transition);
}

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

code, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* Navigation */
.nav-container {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-neutral);
  z-index: 1000;
  transition: var(--transition);
}

nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--color-text);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--color-accent);
  background-color: var(--color-neutral-light);
}

.nav-links a.active {
  color: var(--color-accent);
  font-weight: 600;
}

/* Mobile Navigation Toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-primary);
}

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

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

section {
  padding: var(--spacing-lg) 0;
}

/* Hero Section */
.hero {
  padding: var(--spacing-xl) 0;
  text-align: center;
  background: linear-gradient(135deg, var(--color-neutral-light) 0%, var(--color-white) 100%);
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
  font-weight: 300;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--color-text-light);
  max-width: 700px;
  margin: 0 auto var(--spacing-lg);
}

/* Identity Pillars */
.identity-pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.identity-card {
  background: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  border: 2px solid var(--color-neutral);
  transition: var(--transition);
  text-align: center;
}

.identity-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.identity-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.identity-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* Identity Badges */
.identity-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-right: var(--spacing-xs);
  margin-bottom: var(--spacing-xs);
}

.badge-engineer {
  background-color: #e3f2fd;
  color: #1976d2;
}

.badge-builder {
  background-color: #fff3e0;
  color: #f57c00;
}

.badge-artist {
  background-color: #fce4ec;
  color: #c2185b;
}

/* Card Grids */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-md) 0;
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-neutral);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  transition: var(--transition);
  overflow: hidden;
}

.card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}

.card h3 {
  margin-bottom: var(--spacing-xs);
}

.card-meta {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-sm);
}

/* Featured Section */
.featured-section {
  padding: var(--spacing-lg) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-header h2 {
  margin-bottom: var(--spacing-sm);
}

.section-header p {
  color: var(--color-text-light);
  font-size: 1.125rem;
}

/* Cross-Link Banners */
.cross-link {
  background: var(--color-neutral-light);
  border-left: 4px solid var(--color-accent);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin: var(--spacing-md) 0;
}

.cross-link p {
  margin-bottom: var(--spacing-xs);
}

.cross-link a {
  font-weight: 600;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-accent);
  color: var(--color-white);
  border-radius: var(--border-radius);
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn:hover {
  background-color: var(--color-accent-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(201, 125, 96, 0.3);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn-secondary:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
}

/* Footer */
footer {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-xl);
  text-align: center;
}

footer a {
  color: var(--color-accent-light);
}

footer a:hover {
  color: var(--color-white);
}

/* Breadcrumbs */
.breadcrumbs {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-neutral-light);
  border-bottom: 1px solid var(--color-neutral);
  font-size: 0.875rem;
}

.breadcrumbs-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--color-text-light);
  transition: var(--transition);
}

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

.breadcrumbs-separator {
  color: var(--color-neutral-dark);
  margin: 0 var(--spacing-xs);
}

.breadcrumbs-current {
  color: var(--color-text);
  font-weight: 500;
}

/* Related Content Section */
.related-content {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 2px solid var(--color-neutral);
}

.related-content h3 {
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.related-item {
  padding: var(--spacing-sm);
  border-left: 3px solid var(--color-accent);
  background-color: var(--color-neutral-light);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.related-item:hover {
  background-color: var(--color-white);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transform: translateX(4px);
}

.related-item h4 {
  margin-bottom: var(--spacing-xs);
  font-size: 1.125rem;
}

.related-item h4 a {
  color: var(--color-primary);
}

.related-item h4 a:hover {
  color: var(--color-accent);
}

.related-item p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* Contextual Links Enhancement */
.content-link {
  color: var(--color-accent);
  font-weight: 500;
  border-bottom: 1px dotted var(--color-accent);
  transition: var(--transition);
}

.content-link:hover {
  color: var(--color-accent-light);
  border-bottom-color: var(--color-accent-light);
  border-bottom-style: solid;
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
  }
  
  h1 {
    font-size: 2.5rem;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.25rem;
  }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    flex-direction: column;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-neutral);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .nav-toggle {
    display: block;
  }
  
  .identity-pillars {
    grid-template-columns: 1fr;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  nav {
    position: relative;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  section {
    padding: var(--spacing-md) 0;
  }
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }