/* 
 * GenAI in Additive Manufacturing - Main Styles
 * This is the main stylesheet containing global styles and variables
 */

:root {
  /* Color Variables */
  --primary-blue: #1a73e8;
  --primary-blue-light: #4285f4;
  --primary-blue-lighter: #8ab4f8;
  
  --secondary-dark: #202124;
  --secondary-medium: #5f6368;
  --secondary-light: #dadce0;
  
  --accent-yellow: #fbbc04;
  --accent-green: #34a853;
  
  --background-white: #ffffff;
  --background-light: #f8f9fa;
  
  /* Typography Variables */
  --font-heading: 'Open Sans', 'Roboto', sans-serif;
  --font-body: 'Open Sans', 'Roboto', sans-serif;
  --font-code: 'Roboto Mono', monospace;
  
  /* Spacing Variables */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  
  /* Container width */
  --container-width: 1200px;
  
  /* Border Radius */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  
  /* Box Shadow */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Global Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Base Typography */
html {
  font-size: 16px;
  line-height: 1.5;
  font-family: var(--font-body);
  color: var(--secondary-dark);
  scroll-behavior: smooth;
}

body {
  background-color: var(--background-light);
  margin: 0;
}

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

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 2rem;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: 1.5rem;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

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

a {
  color: var(--primary-blue);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--primary-blue-light);
  text-decoration: underline;
}

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

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

/* Code blocks */
pre, code {
  font-family: var(--font-code);
  background-color: var(--secondary-light);
  border-radius: var(--border-radius-sm);
}

code {
  padding: 0.1em 0.4em;
  font-size: 0.9em;
}

pre {
  padding: var(--spacing-md);
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

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

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

/* Main content area */
main {
  padding: var(--spacing-xl) 0;
}

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

.mb-0 {
  margin-bottom: 0;
}

.mb-1 {
  margin-bottom: var(--spacing-xs);
}

.mb-2 {
  margin-bottom: var(--spacing-sm);
}

.mb-3 {
  margin-bottom: var(--spacing-md);
}

.mb-4 {
  margin-bottom: var(--spacing-lg);
}

.mb-5 {
  margin-bottom: var(--spacing-xl);
}

.mt-0 {
  margin-top: 0;
}

.mt-1 {
  margin-top: var(--spacing-xs);
}

.mt-2 {
  margin-top: var(--spacing-sm);
}

.mt-3 {
  margin-top: var(--spacing-md);
}

.mt-4 {
  margin-top: var(--spacing-lg);
}

.mt-5 {
  margin-top: var(--spacing-xl);
}

/* Images */
img {
  max-width: 100%;
  height: auto;
}

/* Hide elements visually but keep them available for screen readers */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Badge for content complexity */
.complexity-badge {
  display: inline-block;
  padding: 0.25em 0.6em;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 2rem;
  color: var(--background-white);
  margin-right: var(--spacing-sm);
}

.complexity-beginner {
  background-color: var(--accent-green);
}

.complexity-intermediate {
  background-color: var(--accent-yellow);
}

.complexity-advanced {
  background-color: var(--primary-blue);
}