/* CSS Variables for Theme - Dark Neutral Default */
:root {
  /* Dark Neutral Theme - Engineer-focused */
  --color-bg: #1a1a1a;
  --color-surface: #242424;
  --color-text: #e8e8e8;
  --color-text-muted: #b0b0b0;
  --color-text-light: #808080;
  --color-border: #3a3a3a;
  --color-accent: #6ba89a;
  --color-accent-hover: #7bc4b3;
  --color-link: #6ba89a;
  --color-link-hover: #7bc4b3;
  
  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-heading: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* Transitions */
  --transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

/* Base Styles */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--color-bg);
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-primary);
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: var(--transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-narrow {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md) 0;
}

@media (max-width: 768px) {
  .container,
  .container-narrow {
    padding: var(--spacing-lg) var(--spacing-sm) 0;
    max-width: 100%;
  }
}

/* Main Content */
.main-content {
  padding: 0;
  min-height: 100vh;
}

/* Hero Banner - Full Width Background */
.hero-banner-section {
  margin: 0;
  padding: 0;
  width: 100%;
  max-width: 100%;
  position: relative;
}

.hero-banner-container {
  margin: 0;
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  border-radius: 0;
  border: none;
  background-color: transparent;
  padding: 0;
  position: relative;
  max-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-banner-image {
  width: 100%;
  height: 100%;
  max-height: 500px;
  display: block;
  border-radius: 0;
  object-fit: cover;
  object-position: center;
}

/* Hero Section */
.hero-section {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.hero-section h1 {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 400;
  margin: 0 0 var(--spacing-xs);
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.hero-tagline {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--spacing-xs);
  font-weight: 400;
}

.hero-bio {
  font-size: 1rem;
  color: var(--color-text-light);
  margin: 0;
  font-weight: 300;
}

/* Content Sections */
.content-section {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.content-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.content-section h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 400;
  margin: 0 0 var(--spacing-md);
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.content-section p {
  margin: 0 0 var(--spacing-md);
  color: var(--color-text-muted);
  line-height: 1.75;
}

.content-section p:last-child {
  margin-bottom: 0;
}

.content-section a {
  color: var(--color-link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.content-section a:hover {
  color: var(--color-link-hover);
  border-bottom-color: var(--color-link-hover);
}

/* About List Styling */
.about-list {
  margin: var(--spacing-sm) 0 var(--spacing-md);
  padding-left: var(--spacing-md);
  color: var(--color-text-muted);
  line-height: 1.8;
}

.about-list li {
  margin-bottom: var(--spacing-xs);
}

.about-list li:last-child {
  margin-bottom: 0;
}

.about-list a {
  color: var(--color-link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.about-list a:hover {
  color: var(--color-link-hover);
  border-bottom-color: var(--color-link-hover);
}

/* Footer */
.site-footer {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg) 0;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.footer-copyright {
  text-align: center;
}

.footer-copyright p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .hero-section h1 {
    font-size: 2rem;
  }
  
  .hero-banner-container {
    max-height: 300px;
  }
  
  .hero-banner-image {
    width: 100%;
    max-height: 300px;
  }
  
  .content-section h2 {
    font-size: 1.25rem;
  }
  
  .main-content {
    padding: 0;
  }
  
  body {
    font-size: 1rem;
  }
}

@media (min-width: 1200px) {
  .hero-banner-container {
    max-height: 600px;
  }
  
  .hero-banner-image {
    max-height: 600px;
  }
}