/* CSS Variables from BrandingGuide.md - Dark Theme */
@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;600;700&family=Merriweather:wght@400;600;700&display=swap');

:root {
  /* Typography */
  --font-primary: "Open Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-heading: "Merriweather", Georgia, serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
  
  /* Font sizes - 16px base (improved readability) */
  --font-size-xs: 0.75rem;      /* 12px */
  --font-size-sm: 0.875rem;     /* 14px */
  --font-size-base: 1rem;       /* 16px */
  --font-size-lg: 1.125rem;     /* 18px */
  --font-size-xl: 1.25rem;      /* 20px */
  --font-size-2xl: 1.5rem;      /* 24px */
  --font-size-3xl: 2rem;        /* 32px */
  --font-size-4xl: 2.5rem;      /* 40px */
  
  /* Background colors - dark theme */
  --color-bg-body: #444444;
  --color-bg-header: #333333;
  --color-bg-footer: #222222;
  --color-bg-footer2: #171717;
  --color-bg-content: #ffffff;
  --color-bg-widget: #444444;
  
  /* Text colors */
  --color-text-primary: #555555;
  --color-text-heading: #444444;
  --color-text-site-title: #0D85CC;
  --color-text-site-desc: #999999;
  --color-text-footer: #666666;
  --color-text-widget-title: #ffffff;
  
  /* Link colors */
  --color-link: #0D85CC;
  --color-link-hover: #12a7ff;
  --color-link-visited: #0D85CC;
  --color-link-active: #000000;
  
  /* Border colors */
  --color-border: #d7d7d7;
  --color-border-input: #DDD;
  --color-border-input-hover: #CCC;
  
  /* Code colors */
  --color-code-bg: #f3f4f6;
  --color-code-text: #222222;
  
  /* Neutral grays (for components) */
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-white: #ffffff;
  
  /* Primary color aliases (for component consistency) */
  --color-primary: #0D85CC;
  --color-primary-hover: #12a7ff;
  --color-primary-dark: #0a6ba3;
  
  /* Focus indicator */
  --color-focus: #0D85CC;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
}

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

html {
  font-size: 16px;
  color: #666;
  line-height: 1.7;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-text-primary);
  background-color: var(--color-bg-body);
  padding-bottom: 10px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.2;
  font-weight: 600;
  color: var(--color-text-heading);
  margin-top: 0;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

/* Links - Body content */
a:link,
a:visited {
  color: var(--color-link);
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--color-link-hover);
  text-decoration-thickness: 2px;
}

a:active {
  color: var(--color-link-active);
}

a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* Navigation */
.site-nav {
  background-color: var(--color-bg-header);
  border-bottom: 2px solid rgba(13, 133, 204, 0.3);
  min-height: 125px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: 1140px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
  min-height: 125px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  opacity: 1;
  transition: opacity 0.3s ease;
  flex-shrink: 0;
}

.nav-logo:hover {
  opacity: 0.85;
}

.logo-image {
  height: 90px;
  width: auto;
  max-width: 300px;
  display: block;
  object-fit: contain;
}

.logo-fallback {
  font-size: var(--font-size-3xl);
  font-family: var(--font-heading);
  font-variant: small-caps;
  letter-spacing: -0.02em;
  font-weight: bold;
  color: var(--color-text-site-title);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  padding: 0;
}

.nav-links li {
  margin: 0;
}

.nav-links a {
  color: #ffffff;
  text-decoration: none;
  font-weight: 500;
  font-size: var(--font-size-base);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 4px;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--color-link-hover);
  background-color: rgba(255, 255, 255, 0.1);
  text-decoration: none;
}

/* Main Content */
main {
  flex: 1;
  max-width: 1140px;
  width: 100%;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-md);
  min-height: calc(100vh - 200px);
}

/* Content Area */
#content,
.page-content,
.homepage-content {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--color-bg-content);
  padding: var(--spacing-2xl);
  color: var(--color-text-primary);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Paragraphs and Lists */
p {
  margin-bottom: 1.5em;
}

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

ul,
ol {
  margin-bottom: 1.5em;
  margin-left: 1.5em;
}

ol {
  list-style-type: decimal;
}

ul > li {
  list-style-type: disc;
  margin-bottom: 0.5em;
}

ol > li {
  margin-bottom: 0.5em;
}

ul ul,
ol ol,
ul ol,
ol ul {
  margin-top: 0.5em;
  margin-bottom: 0.5em;
}

/* Strong and Emphasis */
strong,
em {
  color: var(--color-text-heading);
}

strong {
  font-weight: 600;
}

/* Code */
code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--color-code-bg);
  color: var(--color-code-text);
  padding: 0.2em 0.4em;
  border-radius: 0.25rem;
}

pre {
  background-color: var(--color-code-bg);
  color: var(--color-code-text);
  padding: 1.5em;
  border: 1px dotted var(--color-border);
  border-radius: 0.375rem;
  overflow-x: auto;
  line-height: 1.5;
  margin: var(--spacing-lg) 0;
}

pre code {
  background: none;
  padding: 0;
  font-size: var(--font-size-sm);
}

/* Horizontal Rules */
hr {
  clear: both;
  height: 1px;
  margin: var(--spacing-xl) 0;
  border: 0;
  background-color: var(--color-border);
}

/* Footer */
.site-footer {
  background-color: var(--color-bg-footer);
  border-top: 2px solid rgba(13, 133, 204, 0.2);
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-3xl);
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.2);
}

.footer-container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  text-align: center;
  color: var(--color-text-footer);
  font-size: var(--font-size-sm);
}

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

.footer-container a {
  color: var(--color-text-footer);
  text-decoration: underline;
}

.footer-container a:hover {
  color: #888888;
}

.footer-container a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

#site-copyright {
  margin-bottom: var(--spacing-md);
}

/* Blog Index */
.blog-index {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--color-bg-content);
  padding: var(--spacing-2xl);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.blog-header {
  margin-bottom: var(--spacing-3xl);
  text-align: center;
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--color-border);
}

.blog-description {
  color: var(--color-text-site-desc);
  font-size: var(--font-size-lg);
  margin-top: var(--spacing-sm);
}

.blog-post-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.blog-post-item {
  margin-bottom: var(--spacing-2xl);
}

.blog-post-item:last-child {
  margin-bottom: 0;
}

.blog-post-preview {
  background-color: var(--color-bg-content);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--spacing-xl);
  transition: all 0.2s ease;
  margin-bottom: var(--spacing-lg);
}

.blog-post-preview:hover {
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
  border-color: var(--color-link);
  transform: translateY(-2px);
}

.blog-post-preview h2 {
  margin-bottom: var(--spacing-sm);
}

.blog-post-preview h2 a {
  text-decoration: none;
  color: var(--color-text-heading);
  transition: color 0.2s ease;
}

.blog-post-preview h2 a:hover {
  color: var(--color-link);
  text-decoration: underline;
}

.blog-post-preview .post-meta {
  color: var(--color-text-site-desc);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-md);
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.read-more {
  display: inline-block;
  margin-top: var(--spacing-md);
  font-weight: 600;
  color: var(--color-link);
}

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

.no-posts {
  text-align: center;
  color: var(--color-text-site-desc);
  padding: var(--spacing-3xl);
  font-style: italic;
}

/* Post Layout */
.post-container {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--color-bg-content);
  padding: var(--spacing-2xl);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.post {
  margin-bottom: var(--spacing-3xl);
}

.post-header {
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--color-border);
}

.post-title {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-heading);
}

.post-meta {
  color: var(--color-text-site-desc);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-md);
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.post-categories {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.category-tag {
  background-color: var(--color-bg-widget);
  color: var(--color-text-widget-title);
  padding: 0.375rem 0.875rem;
  border-radius: 4px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.post-content {
  margin-bottom: var(--spacing-2xl);
}

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

.post-content ul,
.post-content ol {
  margin-bottom: 1.5em;
  padding-left: var(--spacing-xl);
}

.post-content li {
  margin-bottom: 0.75em;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: var(--spacing-xl) 0;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

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

blockquote p {
  margin-bottom: 0.5em;
}

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

/* Post Footer */
.post-footer {
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-sm);
}

.tags-label {
  color: var(--color-text-site-desc);
  font-weight: 600;
  font-size: var(--font-size-sm);
  margin-right: var(--spacing-xs);
}

.tag {
  background-color: var(--color-code-bg);
  color: var(--color-text-primary);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  font-size: var(--font-size-sm);
  border: 1px solid var(--color-border);
}

/* Forms */
label {
  display: block;
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  color: var(--color-text-heading);
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
textarea,
select {
  width: 100%;
  height: 2.5rem;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border-input);
  border-radius: 0.375rem;
  background-color: var(--color-bg-content);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  transition: border-color 0.2s ease;
}

textarea {
  height: auto;
  min-height: 120px;
  resize: vertical;
}

input[type="text"]:hover,
input[type="email"]:hover,
input[type="tel"]:hover,
input[type="url"]:hover,
textarea:hover,
select:hover {
  border-color: var(--color-border-input-hover);
}

input[type="text"]:focus-visible,
input[type="email"]:focus-visible,
input[type="tel"]:focus-visible,
input[type="url"]:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-color: var(--color-link);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group:last-child {
  margin-bottom: 0;
}

.help-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-site-desc);
  margin-top: var(--spacing-xs);
}

.error-text {
  font-size: var(--font-size-sm);
  color: #dc2626;
  margin-top: var(--spacing-xs);
}

input.error,
textarea.error,
select.error {
  border-color: #dc2626;
  background-color: #fef2f2;
}

/* Responsive Design */
@media (max-width: 768px) {
  .site-nav {
    min-height: auto;
    position: relative;
  }
  
  .nav-container {
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-md);
    align-items: flex-start;
  }
  
  .nav-logo {
    width: 100%;
    justify-content: center;
  }
  
  .logo-image {
    height: 70px;
    max-width: 100%;
    margin: 0 auto;
  }
  
  .nav-links {
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
    align-items: stretch;
  }
  
  .nav-links a {
    display: block;
    padding: var(--spacing-sm);
    text-align: left;
  }
  
  main {
    padding: var(--spacing-xl) var(--spacing-md);
  }
  
  #content,
  .page-content,
  .homepage-content,
  .post-container,
  .blog-index {
    padding: var(--spacing-lg);
    border-radius: 4px;
  }
  
  h1 { font-size: var(--font-size-3xl); }
  h2 { font-size: var(--font-size-2xl); }
  h3 { font-size: var(--font-size-xl); }
  
  .blog-post-preview {
    padding: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .logo-image {
    height: 60px;
  }
  
  #content,
  .page-content,
  .homepage-content,
  .post-container,
  .blog-index {
    padding: var(--spacing-md);
  }
}