/**
 * CSS Variables
 */
:root {
  /* Colors */
  --color-primary: #333;
  --color-secondary: blue;
  --color-text: #333;
  --color-text-light: #666;
  --color-background: #fff;
  --color-background-light: #f8f8f8;
  --color-border: #ddd;
  --color-shadow: rgba(0, 0, 0, 0.1);

  /* Typography */
  --font-primary: 'Open Sans', sans-serif;
  --font-heading: 'Montserrat', sans-serif;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 5rem;

  /* Layout */
  --container-width: 1024px;
  --border-radius: 4px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/**
 * Base Styles
 */

/* Set 1rem = 10px for easier calculations */
html {
  font-size: 62.5%;
  line-height: 1.5;
  box-sizing: border-box;
}

/* Apply border-box to all elements */
*,
*:before,
*:after {
  box-sizing: inherit;
}

body {
  margin: 0;
  font-family: var(--font-primary);
  font-size: 1.6rem; /* 16px */
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  background-color: var(--color-background);
}

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

h1 {
  font-size: 3.2rem; /* 32px */
}

h2 {
  font-size: 2.8rem; /* 28px */
}

h3 {
  font-size: 2.4rem; /* 24px */
}

p {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
}

/**
 * Links
 */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);

  &:hover {
    color: var(--color-secondary);
  }
}

/**
 * Container for content
 */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);

  /* Responsive container adjustments */
  @media (max-width: 1024px) {
    padding: 0 var(--spacing-md);
  }
}
/**
 * Header & Navigation
 */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 4px var(--color-shadow);
  background: rgba(255, 255, 255, 0.9);
  padding: var(--spacing-md) 0;
  backdrop-filter: blur(5px); /* Modern blur effect for sticky header */

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

/**
 * Site branding
 */
.brand {
  display: flex;
  align-items: center;
}

.home-link {
  img {
    width: 100px;
    height: auto;
    transition: transform var(--transition-fast);

    @media (max-width: 767px) {
      width: 60px;
    }
  }

  &:hover img {
    transform: scale(1.05); /* Subtle zoom effect on hover */
  }
}

/**
 * Hamburger menu button - hidden by default on desktop
 */
.hamburger-menu {
  display: none; /* Hidden on desktop */
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  z-index: 1000;
  position: relative;

  span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-primary);
    margin: 5px 0;
    transition: all var(--transition-normal);
    border-radius: 2px; /* Rounded edges for the hamburger lines */
  }

  /* Show hamburger on mobile */
  @media (max-width: 767px) {
    display: block;

    /* Hamburger to X animation when active */
    &.active {
      span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
      }

      span:nth-child(2) {
        opacity: 0;
      }

      span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
      }
    }
  }
}

/**
 * Main menu
 */
.main-menu {
  display: flex;
  justify-content: flex-end;
  list-style: none;
  padding: 0;
  margin: 0;

  /* Desktop menu items */
  li {
    padding: 0 var(--spacing-md);
  }

  /* Desktop menu links */
  a {
    text-decoration: none;
    color: var(--color-primary);
    display: inline-block; /* Needed for transform to work */
    transition: transform var(--transition-fast);
    position: relative; /* For underline effect */
    padding: var(--spacing-xs) 0;

    /* Animated underline effect */
    &::after {
      content: '';
      position: absolute;
      width: 0;
      height: 2px;
      bottom: 0;
      left: 0;
      background-color: var(--color-secondary);
      transition: width var(--transition-normal);
    }

    &:hover {
      transform: translateY(-2px);

      &::after {
        width: 100%;
      }
    }
  }

  /* Active menu item */
  &.active a {
    font-weight: bold;

    &::after {
      width: 100%;
      background-color: var(--color-secondary);
    }
  }

  /* Mobile menu styles */
  @media (max-width: 767px) {
    display: flex; /* Always use flex layout */
    position: absolute;
    top: 105%;
    left: 0;
    right: 0;
    z-index: 50;
    background-color: var(--color-background-light);
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md) 0;
    box-shadow: 0 5px 10px var(--color-shadow);
    border-radius: 0 0 var(--border-radius) var(--border-radius);

    /* Hidden by default */
    opacity: 0;
    visibility: hidden;
    transform: translateY(-5rem);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0s 0.3s;

    /* Show menu when active */
    &.active {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
      transition: opacity 0.3s ease, transform 0.3s ease;
    }

    /* Mobile menu items */
    li {
      padding: var(--spacing-sm) 0;
      width: 100%;
      text-align: center;
      border-bottom: 1px solid var(--color-border);

      &:last-child {
        border-bottom: none;
      }
    }

    /* Reset desktop hover effects for mobile */
    a {
      &::after {
        display: none;
      }

      &:hover {
        transform: none;
      }
    }

    /* Animation handled by CSS transitions */
  }
}

/**
 * Current page highlighting
 */
.home .home,
.other-page .other-page,
.blog .blog {
  color: var(--color-secondary) !important;
  font-weight: bold;
  pointer-events: none;
  cursor: default;
}

/**
 * Main Content
 */
main {
  padding: var(--spacing-xl) 0;
  flex: 1 0 auto; /* Allow main to grow and fill available space */
}

/**
 * Images
 */
img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 500px;

  /* Special modifier for full-width images */
  &[src$='#full-width'] {
    max-width: 100%;
    border-radius: 0;
  }
}

/**
 * Footer
 */
footer {
  background: var(--color-primary);
  padding: var(--spacing-md);
  color: #fff;
  margin-top: auto; /* Push footer to bottom */
  box-shadow: 0 -2px 4px var(--color-shadow);

  a {
    color: #fff;
    text-decoration: underline;
    transition: opacity var(--transition-fast);

    &:hover {
      opacity: 0.8;
    }
  }
}

/**
 * Blog Styles
 */
.blog-image {
  margin: var(--spacing-lg) 0;
}

/**
 * Code Highlighting
 */
code[class*='language-'] {
  position: relative;
  font-size: 1.4rem; /* 14px */
  border-radius: var(--border-radius);
  margin: var(--spacing-md) 0;
}

/**
 * Language labels for code blocks
 */
code[class*='language-javascript']:after {
  position: absolute;
  top: 0;
  right: 0;
  content: 'js';
  padding: 5px 8px;
  background-color: rgba(0, 0, 0, 0.3);
  color: #fff;
  font-size: 1.2rem;
  border-radius: 0 var(--border-radius) 0 var(--border-radius);
}

code[class*='language-html']:after {
  position: absolute;
  top: 0;
  right: 0;
  content: 'html';
  padding: 5px 8px;
  background-color: rgba(0, 0, 0, 0.3);
  color: #fff;
  font-size: 1.2rem;
  border-radius: 0 var(--border-radius) 0 var(--border-radius);
}

code[class*='language-css']:after {
  position: absolute;
  top: 0;
  right: 0;
  content: 'css';
  padding: 5px 8px;
  background-color: rgba(0, 0, 0, 0.3);
  color: #fff;
  font-size: 1.2rem;
  border-radius: 0 var(--border-radius) 0 var(--border-radius);
}
/**
 * Fix for Prism.js operator styling
 */
.token.operator {
  background: transparent;
}

/**
 * Blog Author Section
 */
.blog-author {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md);
  background-color: var(--color-background-light);
  border-radius: var(--border-radius);
  box-shadow: 0 2px 4px var(--color-shadow);
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast);

  /* Hover effect */
  &:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--color-shadow);
  }

  /* Author heading */
  h2 {
    margin-top: 0;
    color: var(--color-primary);
    border-bottom: 2px solid var(--color-border);
    padding-bottom: var(--spacing-xs);
  }

  /* Author content container */
  > div {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: var(--spacing-md);
  }

  /* Author image */
  img {
    width: 150px;
    border-radius: 50%; /* Circular image */
    border: 3px solid var(--color-background);
  }

  /* Author bio */
  p {
    padding-left: var(--spacing-md);
    font-style: italic;
    margin: 0;
  }

  /* Responsive layout for small screens */
  @media (max-width: 767px) {
    > div {
      flex-direction: column;
      align-items: center;
      text-align: center;
    }

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

    p {
      padding-left: 0;
    }
  }
}

/**
 * Blog List
 */
.blog-list {
  list-style: none;
  padding: 0;
  margin: 0;

  /* Blog list item */
  li {
    padding-bottom: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    transition: transform var(--transition-fast);

    &:last-child {
      border-bottom: none;
    }

    &:hover {
      transform: translateX(5px);
    }
  }

  /* Blog list link */
  a {
    text-decoration: none;
    color: var(--color-text);
    display: block;

    /* Blog post title */
    h2 {
      display: inline-block;
      color: var(--color-primary);
      border-bottom: 2px solid transparent;
      transition:
        color var(--transition-normal),
        border-bottom var(--transition-normal);
      margin-top: var(--spacing-sm);
    }

    &:hover h2 {
      color: var(--color-secondary);
      border-bottom: 2px solid var(--color-secondary);
    }
  }

  /* Post date */
  time {
    display: block;
    color: var(--color-text-light);
    font-size: 1.4rem;
    margin-bottom: var(--spacing-sm);
  }

  /**
   * Post excerpt
   */
  p {
    margin-top: var(--spacing-sm);
    color: var(--color-text);
  }
}

/**
 * Typography Elements
 */
/**
 * Blockquotes
 */
blockquote {
  border-left: 4px solid var(--color-secondary);
  background: var(--color-background-light);
  padding: var(--spacing-md);
  margin: var(--spacing-md) 0;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  font-style: italic;
  position: relative;
}

blockquote::before {
  content: '"';
  font-size: 4rem;
  position: absolute;
  left: var(--spacing-sm);
  top: -1rem;
  opacity: 0.2;
  font-family: Georgia, serif;
}

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

/**
 * 404 Page
 */
.error-page main {
  text-align: center;
  padding: var(--spacing-xl) 0;

  h1 {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
  }

  a {
    display: inline-block;
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-primary);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: white;
    font-weight: bold;
    transition:
      background-color var(--transition-fast),
      transform var(--transition-fast);

    &:hover {
      background-color: var(--color-secondary);
      transform: translateY(-2px);
    }
  }
}

/**
 * Pagination
 */
.pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md) 0;
  border-top: 1px solid var(--color-border);

  /* Mobile styles */
  @media (max-width: 767px) {
    flex-direction: column;
    gap: var(--spacing-md);

    .pagination-pages {
      order: 1;
    }

    .pagination-previous,
    .pagination-next {
      width: 100%;
      text-align: center;
    }
  }
}

/**
 * Container for page numbers
 */
.pagination-pages {
  display: flex;
  gap: var(--spacing-sm);
}

/**
 * Common styles for all pagination elements
 */
.pagination-page,
.pagination-current,
.pagination-previous,
.pagination-next {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: all var(--transition-fast);
  font-weight: 500;
}

/**
 * Regular page number
 */
.pagination-page {
  background-color: var(--color-background-light);
  color: var(--color-text);
  border: 1px solid var(--color-border);

  &:hover {
    background-color: var(--color-border);
    transform: translateY(-2px);
  }
}

/**
 * Current page
 */
.pagination-current {
  background-color: var(--color-primary);
  color: white;
  border: 1px solid var(--color-primary);
  box-shadow: 0 2px 4px var(--color-shadow);
}

/**
 * Previous and next buttons
 */
.pagination-previous,
.pagination-next {
  background-color: var(--color-background-light);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  font-weight: bold;

  &:hover {
    background-color: var(--color-border);
    transform: translateY(-2px);
  }
}

/**
 * Disabled pagination elements
 */
.pagination-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/**
 * Breadcrumbs
 */
.breadcrumbs {
  max-width: var(--container-width);
  margin: var(--spacing-md) auto 0;
  display: flex;
  gap: var(--spacing-sm);
  list-style: none;
  padding: 0;
  font-family: var(--font-primary);

  @media (max-width: 1024px) {
    padding: 0 var(--spacing-md);
  }

  li {
    font-size: 1.3rem;
    color: var(--color-text-light);
    text-transform: uppercase;
    transition: color var(--transition-fast);

    /* Separator between items */
    &:after {
      content: '›'; /* Using a nicer character for separator */
      margin-left: var(--spacing-xs);
      color: var(--color-primary);
    }

    /* Remove separator from last item */
    &:last-child {
      color: var(--color-primary);
      font-weight: 600;

      &::after {
        display: none;
      }
    }

    /* Hover effect */
    a:hover {
      color: var(--color-secondary);
      text-decoration: none;
    }
  }
}

/**
 * Sidebar Layout
 */
.with-sidebar {
  display: flex;
  gap: var(--spacing-xl);

  @media (max-width: 767px) {
    flex-direction: column;
  }

  /* Sidebar styling */
  .sidebar {
    width: 40rem;
    background-color: var(--color-background-light);
    padding: var(--spacing-md);
    box-shadow: 0 2px 4px var(--color-shadow);
    align-self: flex-start; /* Prevents the sidebar from stretching to full height */
    height: fit-content; /* Makes the sidebar only as tall as its content */

    /* Sidebar lists */
    ul {
      list-style: none;
      padding: 0;
      margin: 0;

      li {
        margin-bottom: var(--spacing-md);
        transition: transform var(--transition-fast);

        &:hover {
          transform: translateX(5px);
        }
      }

      /* Sidebar links */
      a {
        text-decoration: none;
        color: var(--color-primary);
        border-bottom: 1px solid var(--color-border);
        transition: all var(--transition-fast);
        display: inline-block;
        padding-bottom: 2px;

        &:hover {
          color: var(--color-secondary);
          border-bottom: 1px solid var(--color-secondary);
        }
      }

      /* Sidebar text */
      p {
        margin: 0;
        font-size: 1.2rem; /* 12px */
        color: var(--color-text-light);
        text-transform: uppercase;
      }
    }

    /* Responsive sidebar */
    @media (max-width: 767px) {
      width: 100%;
      margin-bottom: var(--spacing-lg);
    }
  }
}