:root {
  --primary-color: #0078D7; /* Joel's blue */
  --primary-color-light: #e6f2ff;
  --primary-color-dark: #0056b3;
  --text-color: #333333;
  --text-color-light: #555555;
  --bg-color: #ffffff;
  --bg-color-soft: #f8f9fa; /* Very light grey for subtle backgrounds */
  --border-color: #dee2e6;
  --border-radius: 8px;
  --shadow-soft: 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-medium: 0 5px 15px rgba(0, 0, 0, 0.1);
  --font-family-heading: 'Poppins', sans-serif;
  --font-family-body: 'Helvetica', Arial, sans-serif;
  --spacing-unit: 1rem; /* Approx 16px */
}

body {
  font-family: var(--font-family-body);
  color: var(--text-color);
  background-color: var(--bg-color);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 1200px; /* Increased for less whitespace */
  margin-left: auto;
  margin-right: auto;
  padding-left: calc(var(--spacing-unit) * 1.5);
  padding-right: calc(var(--spacing-unit) * 1.5);
  width: 100%;
}

/* General Header Styles */
.header {
  background-color: var(--bg-color);
  padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 1.5);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-soft);
}

.header-logo {
  font-family: var(--font-family-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}

.header-logo:hover {
  color: var(--primary-color-dark);
}

.menu-main ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
}

.menu-main li {
  margin-left: calc(var(--spacing-unit) * 1.5);
}

.menu-main a {
  font-family: var(--font-family-body); /* Changed to body for consistency */
  font-size: 1rem; /* Standardized font size */
  color: var(--text-color);
  text-decoration: none;
  padding: calc(var(--spacing-unit) * 0.5) calc(var(--spacing-unit) * 0.75);
  border-radius: calc(var(--border-radius) * 0.5);
  transition: background-color 0.2s ease, color 0.2s ease;
  font-weight: 500; /* Slightly bolder for nav links */
}

/* Header Author Image */
.author-image-wrapper {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--primary-color);
  box-shadow: var(--shadow-soft);
  margin-right: calc(var(--spacing-unit) * 1.5);
}

.author-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.menu-main a:hover,
.menu-main .active a {
  background-color: var(--primary-color-light);
  color: var(--primary-color-dark);
}

/* Footer Styles */
.footer {
  background-color: var(--bg-color-soft);
  color: var(--text-color-light);
  padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 1.5);
  text-align: center;
  font-size: 0.9rem;
  border-top: 1px solid var(--border-color);
  margin-top: calc(var(--spacing-unit) * 3);
}

.footer p {
  margin: 0 0 calc(var(--spacing-unit) * 0.5) 0;
}

.footer a {
  color: var(--primary-color);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

/* Social Icons in Footer */
.social-icons a {
  font-size: 1.5rem;
  margin: 0 calc(var(--spacing-unit) * 0.5);
  color: var(--text-color-light);
  transition: color 0.2s ease;
}

.social-icons a:hover {
  color: var(--primary-color);
}

/* Homepage Specific Styles */
.container-home .content {
  padding-top: calc(var(--spacing-unit) * 1); /* Re-adjust for two-column */
  padding-bottom: calc(var(--spacing-unit) * 2);
}

/* Author image (typically above the two-column layout) */
.author-large {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: calc(var(--spacing-unit) * 1.5); 
  margin-top: calc(var(--spacing-unit) * 0.5);
}

.author-large .author-image {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  margin-bottom: calc(var(--spacing-unit) * 0.5);
  border: 3px solid var(--bg-color);
  box-shadow: var(--shadow-medium);
}

.author-large .author-name {
  font-family: var(--font-family-heading);
  font-size: 1.2rem;
  color: var(--text-color);
  margin-bottom: calc(var(--spacing-unit) * 0.1);
  font-weight: 500;
}

.author-large .author-title {
  font-size: 1rem;
  color: var(--primary-color);
  font-weight: 400;
  margin-bottom: calc(var(--spacing-unit) * 0.25);
}

/* Two-column layout for homepage */
.homepage-layout {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--spacing-unit) * 2);
  margin-top: calc(var(--spacing-unit) * 1);
}

.main-column {
  flex: 2; /* Takes up 2/3 of the space */
  min-width: 300px; /* Ensures content doesn't get too squished */
}

.sidebar-column {
  flex: 1; /* Takes up 1/3 of the space */
  min-width: 250px; /* Ensures sidebar content has enough space */
  border-left: 1px solid var(--border-color);
  padding-left: calc(var(--spacing-unit) * 2);
}

/* Responsive adjustments for two-column layout */
@media (max-width: 992px) { /* Tablet and below */
  .homepage-layout {
    flex-direction: column;
  }
  .sidebar-column {
    border-left: none;
    padding-left: 0;
    margin-top: calc(var(--spacing-unit) * 2);
    border-top: 1px solid var(--border-color);
    padding-top: calc(var(--spacing-unit) * 2);
  }
}

/* Section titles for homepage */
.section-title {
  font-family: var(--font-family-heading);
  font-size: 1.6rem;
  color: var(--primary-color);
  margin-bottom: calc(var(--spacing-unit) * 1.5);
  padding-bottom: calc(var(--spacing-unit) * 0.5);
  border-bottom: 2px solid var(--primary-color-light);
  font-weight: 600;
}

/* Key Skills Section */
.key-skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); /* Responsive grid */
  gap: calc(var(--spacing-unit) * 1.5);
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.skill-card {
  background-color: var(--bg-color-soft);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing-unit) * 1.25);
  text-align: center;
  box-shadow: var(--shadow-soft);
}

.skill-card i {
  font-size: 2.5rem; /* Larger icons */
  color: var(--primary-color);
  margin-bottom: calc(var(--spacing-unit) * 0.75);
}

.skill-card h3 {
  font-family: var(--font-family-heading);
  font-size: 1.1rem;
  color: var(--text-color);
  margin-top: 0;
  margin-bottom: calc(var(--spacing-unit) * 0.5);
  font-weight: 500;
}

.skill-card p {
  font-size: 0.9rem;
  color: var(--text-color-light);
  line-height: 1.5;
  margin-bottom: 0;
}

/* Recent Posts / Projects List on Homepage */
.post-list, .project-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.post-list li, .project-list li {
  margin-bottom: calc(var(--spacing-unit) * 1.5);
  padding-bottom: calc(var(--spacing-unit) * 1.5);
  border-bottom: 1px solid var(--border-color);
}

.post-list li:last-child, .project-list li:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.post-list h3 a, .project-list h3 a {
  font-family: var(--font-family-heading);
  font-size: 1.25rem;
  color: var(--text-color);
  text-decoration: none;
  transition: color 0.2s ease;
  font-weight: 500;
}

.post-list h3 a:hover, .project-list h3 a:hover {
  color: var(--primary-color);
}

.post-meta, .project-meta {
  font-size: 0.85rem;
  color: var(--text-color-light);
  margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.post-summary, .project-summary {
  font-size: 0.95rem;
  color: var(--text-color);
  line-height: 1.6;
}

.read-more-link {
  font-size: 0.9rem;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.read-more-link:hover {
  color: var(--primary-color-dark);
  text-decoration: underline;
}

/* Single Page (Post/Project) Styles */
.single-page-container {
  padding-top: calc(var(--spacing-unit) * 2);
  padding-bottom: calc(var(--spacing-unit) * 3);
}

.single-page-header {
  margin-bottom: calc(var(--spacing-unit) * 2);
  padding-bottom: calc(var(--spacing-unit) * 1.5);
  border-bottom: 1px solid var(--border-color);
}

.single-page-title {
  font-family: var(--font-family-heading);
  font-size: 2.5rem;
  color: var(--text-color);
  margin-bottom: calc(var(--spacing-unit) * 0.75);
  line-height: 1.2;
  font-weight: 700;
}

.single-page-meta {
  font-size: 0.9rem;
  color: var(--text-color-light);
  margin-bottom: calc(var(--spacing-unit) * 1);
}

.single-page-meta span {
  margin-right: calc(var(--spacing-unit) * 1);
}

.single-page-meta i {
  margin-right: calc(var(--spacing-unit) * 0.3);
}

.single-page-content {
  font-size: 1.05rem; /* Slightly larger for readability */
  line-height: 1.75;
}

.single-page-content h1, 
.single-page-content h2, 
.single-page-content h3, 
.single-page-content h4, 
.single-page-content h5, 
.single-page-content h6 {
  font-family: var(--font-family-heading);
  color: var(--text-color);
  margin-top: calc(var(--spacing-unit) * 2.5);
  margin-bottom: calc(var(--spacing-unit) * 1.25);
  font-weight: 600;
  line-height: 1.3;
}

.single-page-content h1 { font-size: 2.2rem; }
.single-page-content h2 { font-size: 1.9rem; border-bottom: 1px solid var(--border-color); padding-bottom: calc(var(--spacing-unit) * 0.4); }
.single-page-content h3 { font-size: 1.6rem; }
.single-page-content h4 { font-size: 1.3rem; }
.single-page-content h5 { font-size: 1.1rem; }
.single-page-content h6 { font-size: 1.0rem; }

.single-page-content p {
  margin-bottom: calc(var(--spacing-unit) * 1.25);
}

.single-page-content a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500; /* Slightly bolder links in content */
}

.single-page-content a:hover {
  text-decoration: underline;
  color: var(--primary-color-dark);
}

.single-page-content ul, 
.single-page-content ol {
  margin-bottom: calc(var(--spacing-unit) * 1.25);
  padding-left: calc(var(--spacing-unit) * 2);
}

.single-page-content li {
  margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.single-page-content blockquote {
  border-left: 4px solid var(--primary-color);
  padding-left: calc(var(--spacing-unit) * 1.5);
  margin: calc(var(--spacing-unit) * 1.5) 0;
  font-style: italic;
  color: var(--text-color-light);
  background-color: var(--bg-color-soft);
  padding-top: calc(var(--spacing-unit) * 0.75);
  padding-bottom: calc(var(--spacing-unit) * 0.75);
  padding-right: calc(var(--spacing-unit) * 1);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.single-page-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  margin: calc(var(--spacing-unit) * 1.5) 0;
  box-shadow: var(--shadow-soft);
}

/* Table Styles */
.single-page-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: calc(var(--spacing-unit) * 1.5);
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--border-color);
}

.single-page-content th,
.single-page-content td {
  border: 1px solid var(--border-color);
  padding: calc(var(--spacing-unit) * 0.75);
  text-align: left;
}

.single-page-content th {
  background-color: var(--bg-color-soft);
  font-family: var(--font-family-heading);
  font-weight: 600;
  color: var(--primary-color);
}

/* Tags and Categories */
.tags-list, .categories-list {
  list-style: none;
  padding: 0;
  margin: calc(var(--spacing-unit) * 1.5) 0;
}

.tags-list li, .categories-list li {
  display: inline-block;
  margin-right: calc(var(--spacing-unit) * 0.5);
  margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.tags-list a, .categories-list a {
  background-color: var(--primary-color-light);
  color: var(--primary-color-dark);
  padding: calc(var(--spacing-unit) * 0.3) calc(var(--spacing-unit) * 0.8);
  border-radius: calc(var(--border-radius) * 0.5);
  font-size: 0.85rem;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.tags-list a:hover, .categories-list a:hover {
  background-color: var(--primary-color);
  color: var(--bg-color);
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: space-between;
  margin-top: calc(var(--spacing-unit) * 3);
  padding-top: calc(var(--spacing-unit) * 1.5);
  border-top: 1px solid var(--border-color);
}

.pagination a {
  color: var(--primary-color);
  text-decoration: none;
  padding: calc(var(--spacing-unit) * 0.5) var(--spacing-unit);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.pagination a:hover {
  background-color: var(--primary-color-light);
  color: var(--primary-color-dark);
  border-color: var(--primary-color);
}

/* Table of Contents Specific Styles */
.toc {
  background-color: var(--bg-color-soft);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--primary-color);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing-unit) * 1.25);
  margin: calc(var(--spacing-unit) * 2) 0;
  box-shadow: var(--shadow-soft);
}

.toc h2 {
  font-family: var(--font-family-heading);
  font-size: 1.4rem; /* Was 1.3em */
  color: var(--primary-color);
  margin-top: 0;
  margin-bottom: calc(var(--spacing-unit) * 1);
  padding-bottom: calc(var(--spacing-unit) * 0.5);
  border-bottom: 1px solid var(--primary-color-light);
  font-weight: 600;
}

.toc ul {
  list-style: none;
  padding-left: 0; /* Remove default padding */
  margin-bottom: 0;
}

.toc ul ul {
  padding-left: calc(var(--spacing-unit) * 1.25); /* Indent nested lists (was 1.5em) */
  margin-top: calc(var(--spacing-unit) * 0.4); /* Was 0.25em */
}

.toc li {
  margin-bottom: calc(var(--spacing-unit) * 0.6); /* Was 0.4em */
}

.toc li a {
  text-decoration: none;
  color: var(--text-color);
  font-size: 0.95rem; /* Was 0.9em */
  transition: color 0.2s ease;
  font-weight: 400;
}

.toc li a:hover {
  color: var(--primary-color-dark);
  text-decoration: underline;
}

/* Additional global styles or utilities */
.text-center { text-align: center; }
.hidden { display: none; }

/* Shadow elevation for cards or interactive elements */
:root {
  --shadow-elevation-low: 0 1px 2px rgba(0,0,0,0.04), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-elevation-medium: 0 2px 4px rgba(0,0,0,0.05), 0 4px 8px rgba(0,0,0,0.05);
  --shadow-elevation-high: 0 5px 10px rgba(0,0,0,0.06), 0 10px 20px rgba(0,0,0,0.06);
}

/* Ensure FontAwesome icons are vertically aligned well with text */
i.fas, i.fab, i.far {
  vertical-align: -0.125em; /* Adjust as needed */
}

/* Specificity for GitHub icon in intro/project content to ensure it's not overridden by general link styles too early */
.intro-content a i.fab.fa-github,
.project-content a i.fab.fa-github,
article a i.fab.fa-github { /* Added article for broader scope */
  margin-right: calc(var(--spacing-unit) * 0.25);
  color: var(--text-color); /* GitHub icon can be standard text color or primary */
}

.intro-content a:hover i.fab.fa-github,
.project-content a:hover i.fab.fa-github,
article a:hover i.fab.fa-github {
  color: var(--primary-color); /* GitHub icon changes to primary on link hover */
}

/* Project Page Images & General Content Images */
/* Target images within the main content area of single pages */
div.content img {
  max-width: 400px; /* Constrain image size, adjust as needed */
  width: 100%; /* Ensures image is responsive within the max-width */
  height: auto;
  display: block;
  margin: calc(var(--spacing-unit) * 1.5) auto; /* Center images with more vertical space */
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-elevation-low);
}

/* Fallback for images directly in .intro-content if needed, though div.content is more specific for single pages */
.intro-content img {
  max-width: 400px; /* Constrain image size, adjust as needed */
  width: 100%; /* Ensures image is responsive within the max-width */
  height: auto;
  display: block;
  margin: calc(var(--spacing-unit) * 1.5) auto; /* Center images with more vertical space */
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-elevation-low);
}

/* Mobile Menu Hamburger - basic styling to ensure it's not broken by our changes */
.hamburger-trigger {
  display: none; /* Assuming theme handles visibility via JS and its own CSS */
}

@media (max-width: 768px) { /* Adjust breakpoint as per theme's mobile switch */
  .menu-main {
    /* Theme likely hides this and shows a mobile menu via hamburger */
    /* We might need to inspect how the theme handles mobile menu display */
    /* For now, let's assume theme's mobile styles take over for .menu-main */
  }
  .hamburger-trigger {
    /* display: block; /* Or as per theme's logic */
  }
  .header {
    padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1);
  }
  .header-logo {
    font-size: 1.3rem;
  }
}


/* custom.css - Styles for preformatted text and code blocks (revised units) */

/* For multi-line code blocks */
pre {
  background-color: #f5f5f5; /* A light, neutral grey background */
  border: 1px solid #e0e0e0;    /* A subtle border */
  border-left: 3px solid #0078D7; /* Accent border, using your theme's blue */
  border-radius: 4px;        /* Slightly rounded corners */
  padding: 16px;             /* Generous padding (was 1em) */
  overflow-x: auto;          /* Enable horizontal scrolling for long lines */
  box-shadow: 0 1px 3px rgba(0,0,0,0.05); /* A very subtle shadow for depth */
  color: #333;               /* Darker text for better contrast */
  font-size: 0.95rem;        /* Adjust font size if needed (was 0.95em) */
  line-height: 1.6;          /* Improve line spacing within the block */
}

/* For inline code snippets like `ignore_errors` (O'Reilly style) */
:not(pre) > code, /* Targets code not directly inside a pre block */
p > code,
li > code,
dd > code,
td > code,
th > code {
  background-color: #e9ecef !important; /* Light grey background */
  border: 1px solid #e0e0e0 !important;    /* Subtle border */
  border-radius: 3px !important;
  padding: 3px 6px !important;           /* Padding */
  margin: 0 2px !important;              /* Small margin */
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace !important; /* Monospace font stack */
  font-size: 0.9rem !important;          /* Slightly smaller font size */
  color: #c7254e !important;            /* Text color (can be adjusted if you prefer something more neutral like #333) */
  line-height: 1.4 !important;           /* Adjust line height if needed */
}


/* Ensure code within pre blocks doesn't inherit inline styles */
pre code {
  background-color: transparent !important;
  padding: 0 !important;
  margin: 0 !important;
  border-radius: 0 !important;
  font-size: inherit !important;
  color: inherit !important;
  border: none !important;
}

/* Homepage Two-Column Layout from _index.md */
.two-column-container {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--spacing-unit) * 3);
  margin-top: calc(var(--spacing-unit) * 2);
}

.left-column {
  flex: 2;
  min-width: 300px;
}

.right-column {
  flex: 1;
  min-width: 280px;
}

.skills-section-wrapper {
  background-color: var(--bg-color-soft);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing-unit) * 1.5);
  box-shadow: var(--shadow-soft);
}

.skills-section-wrapper h3 {
  font-family: var(--font-family-heading);
  font-size: 1.6rem;
  color: var(--primary-color);
  margin-top: 0;
  margin-bottom: calc(var(--spacing-unit) * 1.5);
  padding-bottom: calc(var(--spacing-unit) * 0.5);
  border-bottom: 2px solid var(--primary-color-light);
  font-weight: 600;
}

.skills-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-unit);
}

.skills-grid .skill-card {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-unit);
  display: flex;
  align-items: center;
  gap: var(--spacing-unit);
}

.skills-grid .skill-card i {
  font-size: 1.5rem;
  color: var(--primary-color);
  width: 30px;
  text-align: center;
}

.skills-grid .skill-card span {
  font-size: 1rem;
  color: var(--text-color);
  font-weight: 500;
}

@media (max-width: 768px) {
  .two-column-container {
    flex-direction: column;
  }
  .right-column {
    margin-top: calc(var(--spacing-unit) * 2);
  }
}