/* Style 1: Modern Tech Professional */
/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #2563eb;
  --secondary-color: #1e40af;
  --accent-color: #10b981;
  --text-color: #1f2937;
  --text-light: #6b7280;
  --bg-color: #ffffff;
  --bg-light: #f9fafb;
  --border-color: #e5e7eb;
  --max-width: 1200px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header */
.site-header {
  background-color: var(--bg-color);
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo {
  text-decoration: none;
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-image {
  height: 48px;
  width: auto;
}

.book-title {
  font-size: 1.5rem;
  font-weight: 700;
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.main-nav a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: color 0.2s;
}

.main-nav a:hover {
  color: var(--primary-color);
}

/* Main Content */
main {
  min-height: calc(100vh - 200px);
}

.page-content {
  padding: 4rem 0;
  background-image: url('/images/geometric-wallpaper.svg');
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  position: relative;
}

.page-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.85);
  z-index: 0;
}

.page-content > * {
  position: relative;
  z-index: 1;
}

.page-content h1 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
  color: var(--text-color);
}

.page-content h2 {
  font-size: 2rem;
  margin-top: 3rem;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.page-content h3 {
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.page-content p {
  margin-bottom: 1.5rem;
  color: var(--text-light);
  font-size: 1.125rem;
}

.page-content ul, .page-content ol {
  margin-left: 2rem;
  margin-bottom: 1.5rem;
  color: var(--text-light);
}

.page-content li {
  margin-bottom: 0.5rem;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  padding: 6rem 0;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: white;
}

.hero .subtitle {
  font-size: 1.5rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

.hero .description {
  font-size: 1.25rem;
  max-width: 800px;
  margin: 0 auto 3rem;
  opacity: 0.9;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-size: 1.125rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0.5rem;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background-color: white;
  color: var(--primary-color);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
  background-color: transparent;
  color: white;
  border: 2px solid white;
}

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

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* CTA Section */
.cta-section {
  background-color: var(--bg-light);
  padding: 4rem 2rem;
  text-align: center;
  margin: 4rem 0;
  border-radius: 1rem;
}

.cta-section h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
}

.cta-section .btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.cta-section .btn-secondary {
  background-color: white;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.cta-section .btn-secondary:hover {
  background-color: var(--primary-color);
  color: white;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin: 3rem 0;
}

@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

.feature {
  padding: 2rem;
  background-color: var(--bg-light);
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
}

.feature h3 {
  margin-top: 0;
  color: var(--primary-color);
}

/* Blog */
.blog-list {
  max-width: 800px;
  margin: 2rem auto;
  background-color: var(--bg-color);
  padding: 1.5rem 2rem;
  border-radius: 0.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.blog-preview {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border-color);
}

.blog-preview:first-child {
  padding-top: 0.5rem;
}

.blog-preview:last-child {
  border-bottom: none;
  padding-bottom: 0.5rem;
}

.blog-preview-title {
  margin: 0 0 0.5rem 0;
  font-size: 1.25rem;
}

.blog-preview-title a {
  color: var(--text-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

.blog-preview-title a:hover {
  color: var(--primary-color);
}

.blog-preview-meta {
  color: var(--text-light);
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.blog-preview-author {
  margin-left: 0.5rem;
}

.blog-preview-excerpt {
  color: var(--text-light);
  margin-bottom: 0.75rem;
  font-size: 1rem;
  line-height: 1.5;
}

.read-more {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

.read-more:hover {
  color: var(--secondary-color);
}

/* Blog Post */
.blog-post {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--bg-color);
  padding: 2rem;
  border-radius: 0.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.post-header {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.post-title {
  margin: 0 0 1rem 0;
  color: var(--text-color);
}

.post-meta {
  color: var(--text-light);
  font-size: 0.875rem;
}

.post-author {
  margin-left: 1rem;
}

.post-content {
  font-size: 1.125rem;
  line-height: 1.8;
}

.post-content h2 {
  margin: 2rem 0 1rem 0;
  color: var(--text-color);
}

.post-content h3 {
  margin: 1.5rem 0 1rem 0;
  color: var(--text-color);
}

.post-content p {
  margin-bottom: 1.5rem;
}

.post-content ul,
.post-content ol {
  margin-bottom: 1.5rem;
  padding-left: 2rem;
}

.post-content li {
  margin-bottom: 0.5rem;
}

.post-content code {
  background-color: var(--bg-light);
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.875em;
}

.post-content pre {
  background-color: var(--bg-light);
  padding: 1rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

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

.post-footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

/* Author Headshot */
.author-headshot {
  float: right;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 0 1.5rem 2rem;
  border: 4px solid var(--border-color);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Footer */
.site-footer {
  background-color: var(--bg-light);
  border-top: 1px solid var(--border-color);
  padding: 3rem 0;
  margin-top: 4rem;
  text-align: center;
}

.footer-content p {
  color: var(--text-light);
  margin-bottom: 0.5rem;
}

/* Responsive */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 1rem;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero .subtitle {
    font-size: 1.25rem;
  }

  .page-content h1 {
    font-size: 2rem;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    max-width: 300px;
  }

  .author-headshot {
    float: none;
    display: block;
    margin: 0 auto 2rem auto;
  }
}