/* Base styles */
html, body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f8f9fa;
  color: #212529;
  min-height: 100vh;
  line-height: 1.6;
}
/* Container utility */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
}
footer {
  background-color: #34495e;
  color: #ecf0f1;
  padding: 2rem 0;
  text-align: center;
  border-top: none;
  box-shadow: 0 -2px 5px rgba(0,0,0,0.1);
  font-size: 0.9rem;
}
footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
footer p {
  font-size: 0.85rem;
  color: #bdc3c7;
  line-height: 1.5;
  margin: 0;
  max-width: 600px;
}
footer p a {
  color: #9bd3ff;
  text-decoration: none;
  transition: color 0.2s ease-in-out;
}
footer p a:hover {
  color: #ecf0f1;
  text-decoration: underline;
}
footer img {
  vertical-align: middle;
  margin-left: 0.5rem;
  opacity: 0.8;
  transition: opacity 0.2s ease-in-out;
}
footer img:hover {
  opacity: 1;
}
footer nav {
  margin-top: 0;
  margin-bottom: 0;
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}
footer nav p {
  margin: 0;

}
footer .social-contact {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 1rem;
}
footer .social-contact p {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}
footer .social-contact p img,
footer .social-contact p svg {
  vertical-align: middle;
  margin: 0 0.25rem;
  width: 24px;
  height: 24px;
  opacity: 0.9;
  transition: opacity 0.2s ease-in-out;
}
footer .social-contact p img:hover,
footer .social-contact p svg:hover {
  opacity: 1;
}
.xml-sitemap-link {
  font-size: 0.85em;
  color: #777;
}
/* Header */
header#site-header {
  background-color: #2c3e50;
  color: #ecf0f1;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}
/* header#site-header .container {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 1rem 0;
} */
header#site-header .container {
  max-width: 800px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  position: relative;
}
/* header#site-header .logo {
  display: flex;
  align-items: center;
  font-size: 1.8rem;
  font-weight: bolder;
  position: relative;
} */
/* Logo section - positioned above nav */
header#site-header .logo {
  display: flex;
  align-items: center;
  font-size: 1.8rem;
  font-weight: bolder;
  position: relative;
  text-decoration: none;
  color: inherit;
  gap: 1rem;
    margin-left: 10px;
  padding-left: 64px; /* Space for the icon */
}
/* .site-title {
  margin: 0 1rem;
  white-space: nowrap;
  flex-shrink: 0;
  color: inherit;
  text-decoration: none;
  font-weight: bolder;
  font-size: 
  1.8rem;
} */
header#site-header .site-title {
  color: inherit;
  text-decoration: none;
  position: relative;
  display: inline-block;
}
header#site-header .site-title, a {
  color: inherit;
  text-decoration: none;
  position: relative;
  display: inline-block;
}
header#site-header .site-title a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background-color: #ecf0f1;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
header#site-header .site-title a:hover::after {
  transform: scaleX(1);
}
/* Logo icon that acts as home link - spans from site title to nav */
.nav-logo {
  text-decoration: none;
  color: inherit;
  display: flex;
  align-items: flex-end;
  position: absolute;
  left: 1rem;
  top: 1rem;
  bottom: 1rem;
}
/* Favicon styles */
#favicon-preview {
  width: 64px;
  height: 64px;
  border-radius: 4px;
  background-color: #333;
  display: inline-block;
  vertical-align: middle;
}
.concept {
  width: 64px;
  height: 64px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}
.icon {
  width: 64px;
  height: 64px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 24px;
  user-select: none;
}
/* Deep Dive Lambda */
.deep-dive {
  background-color: #0A192F;
  border-radius: 8px;
  color: #00CED1;
  font-weight: 700;
  box-shadow:
    0 0 4px #00CED1,
    0 0 12px #00CED1;
}
/* Ghost Lambda */
.ghost {
  background-color: #F0F8FFCC;
  border-radius: 8px;
  color: #008B8B;
  font-weight: 800;
  text-shadow: 0 0 1px rgba(0, 0, 0, 0.2);
}
/* Circle of Logic */
.circle {
  background-color: #1E90FF;
  border-radius: 50%;
  color: #E0FFFF;
  font-weight: 600;
}
div.concept {
  display: none;
}
div.concept#favicon1 {
  display: inline-block;
}
.layout {
  display: flex;
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1.5rem;
  gap: 2rem;
}
/* Main content */
main.container {
  flex: 1;
  background-color: #ffffff;
  padding: 2rem;
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}
main h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  border-bottom: 2px solid #2c3e50;
  padding-bottom: 0.3rem;
}
main article p {
  font-size: 1rem;
  color: #444;
}
main {
  padding: 1rem;
}
.layout {
  display: flex;
  align-items: flex-start;
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1.5rem;
  gap: 2rem;
}
header#site-header nav.site-nav {
  display: flex;
  gap: 1rem;
}
header#site-header nav.site-nav a,
nav.site-nav .dropdown-content form button {
  text-decoration: none;
  font-weight: 600;
  padding: 0.3rem 0.6rem;
  border-radius: 3px;
  transition: background-color 0.2s ease-in-out;
}
nav.site-nav .dropdown-content form button {
  all: unset;
  display: block;
  width: 100%;
  padding: 0.3rem 0.6rem;
  color: #2c3e50;
  cursor: pointer;
  font: inherit;
  font-weight: 600; /* Match the link font weight */
  text-align: left;
  user-select: none;
  box-sizing: border-box;
}
header#site-header nav.site-nav > a {
  color: #ecf0f1;
}
header#site-header nav.site-nav a:hover,
header#site-header nav.site-nav a:focus,
nav.site-nav .dropdown-content form button:hover,
nav.site-nav .dropdown-content form button:focus {
  background-color: #34495e;
}
nav.site-nav .dropdown {
  position: relative;
  display: block;
}
nav.site-nav .dropbtn {
  display: inline-block;
  cursor: pointer;
}
nav.site-nav .dropdown-content {
  display: none;
  position: absolute;
  background-color: white;
  min-width: 160px;
  z-index: 1;
  box-shadow: 0px 8px 16px rgba(0,0,0,0.2);
}
nav.site-nav .dropdown-content a {
  display: block;
  padding: 0.3rem 0.6rem;
  text-decoration: none;
  color: #2c3e50;
  font-weight: 600; /* Match the button font weight */
}
nav.site-nav .dropdown-content a:hover,
nav.site-nav .dropdown-content form button:hover {
  color: #ecf0f1;
  background-color: #34495e; /* Match the main nav hover color */
}
nav.site-nav .dropdown:hover .dropdown-content {
  display: block;
}
header#site-header .menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5em;
  padding: 0.5em;
}
nav.site-nav .dropdown-content form {
  margin: 0;
}
/* Navigation row with consistent left alignment */
.nav-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  padding-left: 64px; /* Same as icon width + gap to align with site title */
}
/* Logo icon that acts as home link - spans from site title to nav */
.nav-logo {
  text-decoration: none;
  color: inherit;
  display: flex;
  align-items: flex-end;
  position: absolute;
  left: 1rem;
  top: 1rem;
  bottom: 1rem;
}
/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
.sidebar {
  width: 250px;
  background-color: #f8f9fa;
  border-right: 1px solid #e0e0e0;
  padding: 1em;
  font-size: 0.95rem;
  font-family: Arial, sans-serif;
  box-shadow: 2px 0 5px rgba(0, 0, 0, 0.05);
  position: relative;
}
/* Apply to all lists */
.sidebar nav ul {
  list-style: none;
  padding-left: 0;
}
.sidebar h4.month-label,
.sidebar a.post-label {
  text-transform: capitalize !important;
}
.sidebar .menu-year {
  font-weight: 700;
  font-size: 1.2rem;
  color: #333333;
  margin-bottom: 1rem;
  border-bottom: 2px solid #2c3e50;
  padding-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.sidebar .menu-month {
  margin-bottom: 1rem;
  font-weight: 600;
  color: #555555;
}
.sidebar .menu-month ul.posts-list {
  list-style: none;
  padding-left: 1rem;
  margin-top: 0.3rem;
}
.sidebar .menu-month li.post-label a {
  color: #2c3e50;
  text-decoration: none;
  display: block;
  padding: 0.2rem 0;
  transition: color 0.2s ease-in-out;
}
.sidebar .menu-month li.post-label a:hover {
  color: #1a73e8;
  text-decoration: underline;
}
.sidebar .menu-year {                 
  margin-bottom: 1em;
}
.sidebar .month-label {
  font-weight: normal;
  display: block;
  margin-bottom: 0.3em;
}
/* Enhanced TOC Styles */
.toc {
  background: #f8f9fa;
  border: 1px solid #e9ecef;
  border-radius: 8px;
  box-sizing: border-box;
  margin-bottom: 1em;
  padding: 1.5em;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}
.toc.sticky {
  position: fixed;
  top: 20px;
  z-index: 1000;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  border-color: #dee2e6;
}
.toc.sticky.bottom-boundary {
  position: fixed;
  max-height: none;
  overflow-y: auto;
}
/* Custom Scrollbar - Subtle and Non-intrusive */
.toc::-webkit-scrollbar {
  width: 6px;
}
.toc::-webkit-scrollbar-track {
  background: transparent;
  border-radius: 3px;
}
.toc::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 3px;
  transition: background 0.3s ease;
}
.toc::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.4);
}
/* Firefox Scrollbar */
.toc {
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 0, 0, 0.2) transparent;
}
/* TOC Content Styles */
.toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.toc li {
  margin: 0.5rem 0;
  position: relative;
}
.toc li.h3 {
  margin-left: 1rem;
  font-size: 0.9rem;
}
.toc a {
  display: block;
  padding: 0.5rem 0.75rem;
  text-decoration: none;
  color: #495057;
  border-radius: 4px;
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
  word-wrap: break-word;
  line-height: 1.4;
}
.toc a:hover {
  background-color: #e9ecef;
  color: #2c3e50;
  border-left-color: #007bff;
  transform: translateX(2px);
}
.toc a:focus {
  outline: 2px solid #007bff;
  outline-offset: 2px;
}
/* Active link highlighting */
.toc a.active {
  background-color: #e3f2fd;
  color: #1976d2;
  border-left-color: #1976d2;
  font-weight: 600;
}
.toc-header {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: #2c3e50;
  border-bottom: 2px solid #dee2e6;
  padding-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
/* Ensure proper spacing between sidebar sections */
.sidebar nav > * + .toc {
  margin-top: 2rem;
  border-top: 1px solid #dee2e6;
  padding-top: 1.5rem;
}
/* Animation for smooth transitions */
.toc {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.toc.sticky {
  animation: slideInSticky 0.3s ease-out;
}
@keyframes slideInSticky {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@media (max-width: 600px) {
  main {
    padding: 1rem 0.5rem;
  }
  footer .container {
    padding: 1.5rem;
  }
  footer p {
    font-size: 0.8rem;
  }
  .toc {
    padding: 1rem;
    margin-bottom: 1.5rem;
  }
  
  .toc-header {
    font-size: 1rem;
  }
  
  .toc a {
    padding: 0.4rem 0.5rem;
    font-size: 0.9rem;
  }
  
  .toc li.h3 {
    margin-left: 0.5rem;
  }
}
@media (max-width: 900px) {
  main {
    margin-left: 0;
    margin-left: 200px;
  }
  main.container {
    margin: 0;
  }
  .layout {
    flex-direction: column;
  }
  .toc.sticky {
    position: relative;
    top: auto;
    left: auto;
    width: auto !important;
    max-height: 300px;
    z-index: auto;
  }
}
/* Navigation adjustments for small screens */
@media (max-width: 768px) {
  .layout {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
  }
  header#site-header .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  header#site-header nav.site-nav {
    flex-direction: column;
    gap: 0;
    position: unset;
    top: 3em;
    left: 0;

    width: 100%;
    height: auto;
    float: none;
    padding: 0.5rem;
    border-bottom: 1px solid #444;
    
    text-align: left;
  }
  header#site-header nav.site-nav.hide {
    display: none;
  }
  header#site-header #siteNav.hide a {
    display: none;
  }
  nav.site-nav {
    flex-direction: column;
    gap: 0;
    width: 100%;
  }
  .nav-row {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    padding-left: 0;
  }
  .nav-logo {
    position: relative;
    left: 0;
    margin-bottom: 0.5rem;
  }
  nav.site-nav ul {
    display: block;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 0.5rem 0;
    margin: 0;
    list-style: none;
  }
  nav.site-nav ul li {
    margin: 0.25rem 0;
    border: none;
  }
  nav.site-nav ul li a {
    padding: 0.5rem 1rem;
    display: block;
    border-radius: 0;
  }
  nav.site-nav a {
    text-transform: capitalize;
  }
  header#site-header .menu-toggle {
    display: block;
    width: 100%;
    text-align: left;
  }
  header#site-header .dropdown {
    position: relative;
  }
  header#site-header .dropdown-content {
    position: static;
  }
}