/* ============================================ */
/* GLOBAL STYLES                               */
/* ============================================ */

:root {
  --color-primary: #212529;
  --color-secondary: #495057;
  --color-accent: #0056b3;
  --color-light: #f8f9fa;
  --color-border: #e9ecef;
  --color-text: #212529;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-base: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --max-width: 1200px;
  --transition: 0.3s ease;
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-size-base: 1rem;
  --font-size-lg: 1.5rem;
  --font-size-xl: 2rem;
  --line-height: 1.6;
  --line-height-relaxed: 1.8;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: #fff;
}

/* ============================================ */
/* NAVIGATION BAR                              */
/* ============================================ */

.navbar {
  padding: var(--spacing-base) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--spacing-base);
}

.nav-logo {
  font-size: var(--font-size-lg);
  font-weight: 700;
  text-decoration: none;
  color: var(--color-primary);
  transition: opacity 0.3s ease;
}

.nav-right {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  text-decoration: none;
  color: var(--color-secondary);
  font-size: var(--font-size-base);
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--color-secondary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 0;
}

/* ============================================ */
/* MAIN CONTAINER                              */
/* ============================================ */

.container {
  max-width: var(--max-width);
  margin: var(--spacing-xl) auto;
  padding: 0 var(--spacing-base);
}

/* ============================================ */
/* HOME SECTION                                */
/* ============================================ */

.home-section {
  text-align: center;
  padding: var(--spacing-xl) 0;
}

.home-section h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-base);
  color: var(--color-primary);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.home-section p {
  font-size: 1.1rem;
  color: var(--color-secondary);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* ============================================ */
/* BLOGS SECTION                               */
/* ============================================ */

.blogs-section {
  width: 100%;
}

.blogs-section h1 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-lg);
  color: var(--color-primary);
}

/* ============================================ */
/* ARTICLES SECTION                            */
/* ============================================ */

.articles-section,
.taxonomy-page,
.terms-page {
  width: 100%;
}

.articles-section h1,
.taxonomy-page h1,
.terms-page h1 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-lg);
  color: var(--color-primary);
}

.articles-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* ============================================ */
/* ARTICLE ITEM COMPONENT                      */
/* ============================================ */

.article-item {
  display: flex;
  gap: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.article-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.article-date {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-width: 60px;
  padding-top: var(--spacing-sm);
}

.article-date .month {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.article-date .day {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary);
}

.article-content {
  flex: 1;
}

.article-content h2 {
  margin: 0 0 var(--spacing-sm) 0;
  font-size: var(--font-size-lg);
  line-height: 1.4;
}

.article-content h2 a {
  text-decoration: none;
  color: var(--color-primary);
}

.article-meta {
  color: #6c757d;
  font-size: 0.95rem;
  margin: var(--spacing-sm) 0 var(--spacing-base) 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

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

.tag {
  background-color: var(--color-light);
  padding: var(--spacing-xs) 0.75rem;
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--color-secondary);
  white-space: nowrap;
}

.article-summary {
  color: var(--color-secondary);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

.article-actions {
  margin: var(--spacing-base) 0 0 0;
}

.read-more {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
}

.read-more:hover {
  text-decoration: underline;
}

/* ============================================ */
/* BLOG POST PAGE                              */
/* ============================================ */

.blog-post {
  width: 100%;
}

.post-wrapper {
  display: grid;
  grid-template-columns: 1fr 200px;
  gap: var(--spacing-xl);
  max-width: 1000px;
  margin: 0 auto;
  width: 100%;
}

.post-container {
  max-width: 800px;
  width: 100%;
  min-width: 0;
}

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

.post-header h1 {
  font-size: 2.5rem;
  line-height: 1.3;
  margin: 0 0 var(--spacing-md) 0;
  color: var(--color-primary);
}

.post-date {
  color: var(--color-secondary);
  font-size: 1rem;
  margin: 0 0 var(--spacing-base) 0;
}

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

.post-tags .tag {
  background-color: var(--color-light);
  padding: var(--spacing-xs) 0.75rem;
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--color-secondary);
}

.post-content {
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
  font-size: 1rem;
  margin-bottom: var(--spacing-xl);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
  margin: var(--spacing-lg) 0 var(--spacing-base) 0;
  color: var(--color-primary);
  line-height: 1.3;
}

.post-content h1 {
  font-size: 1.6rem;
}

.post-content h2 {
  font-size: 1.3rem;
}

.post-content h3 {
  font-size: 1.1rem;
}

.post-content p {
  margin-bottom: var(--spacing-base);
}

.post-content ul,
.post-content ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-base);
}

.post-content li {
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-relaxed);
}

.post-content code {
  background-color: var(--color-light);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: 'Courier New', monospace;
  font-size: 0.95rem;
  color: #d73a49;
}

.post-content pre {
  background-color: #f6f8fa;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: var(--spacing-base);
  overflow-x: auto;
  margin-bottom: var(--spacing-base);
}

.post-content pre code {
  background-color: transparent;
  color: inherit;
  padding: 0;
  font-size: 0.95rem;
}

.post-content blockquote {
  border-left: 4px solid var(--color-accent);
  padding-left: var(--spacing-base);
  margin-left: 0;
  margin-bottom: var(--spacing-base);
  color: var(--color-secondary);
  font-style: italic;
}

.post-content a {
  color: var(--color-accent);
  text-decoration: none;
}

.post-content a:hover {
  text-decoration: underline;
}

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

.back-link {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
}

.back-link:hover {
  text-decoration: underline;
}

/* ============================================ */
/* TABLE OF CONTENTS                           */
/* ============================================ */

.post-toc {
  position: sticky;
  top: 100px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

.toc-nav {
  padding: 0;
  border-radius: 0;
  border-left: none;
}

.toc-nav h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin: 0 0 var(--spacing-sm) 0;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.toc-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc-nav li {
  margin: 0;
  padding: 0;
}

.toc-nav a {
  display: block;
  padding: 0.3rem 0;
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.85rem;
  line-height: 1.4;
  transition: all var(--transition);
}

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

.toc-nav a.active {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: underline;
}

.toc-nav ul ul {
  margin-left: var(--spacing-base);
}

.toc-nav ul ul a {
  font-size: 0.8rem;
  color: var(--color-text);
}

/* ============================================ */
/* ABOUT PAGE                                  */
/* ============================================ */

.about-page {
  width: 100%;
}

.about-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: start;
}

.about-left {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.profile-image-wrapper {
  width: 300px;
  height: 300px;
  border-radius: 50%;
  overflow: hidden;
  background-color: var(--color-light);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.profile-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-border) 0%, var(--color-light) 100%);
}

.profile-info {
  text-align: center;
  width: 100%;
}

.info-text {
  color: var(--color-secondary);
  font-size: 0.95rem;
  margin: var(--spacing-sm) 0;
  line-height: var(--line-height);
}

.info-text strong {
  color: var(--color-primary);
  font-weight: 600;
}

.about-right {
  padding-top: var(--spacing-base);
}

.about-right h1 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

.page-content {
  color: var(--color-secondary);
  line-height: var(--line-height-relaxed);
  font-size: var(--font-size-base);
}

.page-content p {
  margin-bottom: var(--spacing-base);
}

.page-content a {
  color: var(--color-accent);
  text-decoration: none;
}

/* ============================================ */
/* TERMS AND TAXONOMY PAGES                    */
/* ============================================ */

.terms-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-base);
  margin-top: var(--spacing-lg);
}

.term-item {
  padding: var(--spacing-base);
  background-color: var(--color-light);
  border-radius: 4px;
  text-decoration: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.term-item a {
  text-decoration: none;
  color: var(--color-accent);
  font-weight: 600;
  flex: 1;
}

.term-count {
  color: #6c757d;
  font-size: 0.9rem;
  margin-left: var(--spacing-sm);
  white-space: nowrap;
  background-color: rgba(0, 0, 0, 0.05);
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
}

/* ============================================ */
/* FOOTER                                      */
/* ============================================ */

footer {
  text-align: center;
  padding: var(--spacing-lg) 0;
  color: var(--color-secondary);
  font-size: 0.9rem;
  margin-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

/* ============================================ */
/* IMAGE AND MEDIA RESPONSIVENESS              */
/* ============================================ */

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.post-content img {
  border-radius: 6px;
  margin: var(--spacing-base) 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-base);
  overflow-x: auto;
  display: block;
}

table th,
table td {
  border: 1px solid var(--color-border);
  padding: 0.5rem;
  text-align: left;
}

table th {
  background-color: var(--color-light);
  font-weight: 600;
}

/* ============================================ */
/* RESPONSIVE DESIGN                           */
/* ============================================ */

/* Tablet screens (768px and below) */
@media (max-width: 768px) {
  :root {
    --spacing-xl: 2rem;
    --spacing-lg: 1.5rem;
    --font-size-base: 0.95rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.75rem;
  }

  .post-wrapper {
    grid-template-columns: 1fr;
  }

  .post-toc {
    position: static;
    max-height: none;
  }

  .blog-item {
    grid-template-columns: 70px 1fr;
    gap: var(--spacing-base);
    padding: var(--spacing-base);
  }

  .nav-container {
    flex-direction: row;
    gap: var(--spacing-base);
    padding: var(--spacing-base) var(--spacing-base);
    justify-content: space-between;
    align-items: center;
  }

  .nav-logo {
    font-size: 1.25rem;
    flex-shrink: 0;
  }

  .nav-right {
    gap: 1rem;
    width: auto;
    justify-content: flex-end;
    flex-wrap: wrap;
  }

  .nav-link {
    font-size: 0.9rem;
  }

  .article-item {
    flex-direction: column;
    gap: var(--spacing-base);
    padding-bottom: var(--spacing-base);
  }

  .article-date {
    flex-direction: row;
    gap: var(--spacing-sm);
    padding: 0;
    min-width: auto;
  }

  .article-date .day {
    font-size: 1.5rem;
  }

  .container {
    margin: var(--spacing-lg) auto;
    padding: 0 var(--spacing-base);
  }

  .about-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .profile-image-wrapper {
    width: 200px;
    height: 200px;
  }

  .about-right {
    padding-top: 0;
  }

  .about-right h1 {
    font-size: var(--font-size-lg);
  }

  .articles-section h1,
  .taxonomy-page h1,
  .terms-page h1 {
    font-size: var(--font-size-lg);
  }

  .term-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }

  .term-count {
    margin-left: 0;
  }

  .home-section h1 {
    font-size: 1.75rem;
  }

  .home-section p {
    font-size: 1rem;
  }

  .post-header h1 {
    font-size: 2rem;
  }

  .post-content h1 {
    font-size: 1.4rem;
  }

  .post-content h2 {
    font-size: 1.1rem;
  }

  .post-content code {
    font-size: 0.9rem;
  }

  .post-content pre {
    padding: var(--spacing-base);
    font-size: 0.85rem;
  }

  .post-wrapper {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .post-toc {
    position: static;
    max-height: none;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
  }
}

/* Small mobile screens (480px and below) */
@media (max-width: 480px) {
  :root {
    --spacing-xl: 1.5rem;
    --spacing-lg: 1rem;
    --spacing-md: 0.75rem;
    --font-size-base: 0.9rem;
    --font-size-lg: 1.1rem;
    --font-size-xl: 1.5rem;
  }

  .nav-logo {
    font-size: 1rem;
  }

  .nav-right {
    gap: 0.75rem;
  }

  .nav-link {
    font-size: 0.8rem;
  }

  .article-meta {
    font-size: 0.8rem;
  }

  .tag {
    font-size: 0.7rem;
    padding: 0.15rem 0.4rem;
  }

  .profile-image-wrapper {
    width: 150px;
    height: 150px;
  }

  .home-section h1 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
  }

  .home-section p {
    font-size: 0.95rem;
  }

  .post-header h1 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-base);
  }

  .post-content h1 {
    font-size: 1.25rem;
    margin: var(--spacing-base) 0 var(--spacing-sm) 0;
  }

  .post-content h2 {
    font-size: 1rem;
    margin: var(--spacing-base) 0 var(--spacing-sm) 0;
  }

  .post-content h3 {
    font-size: 0.95rem;
  }

  .post-content p {
    margin-bottom: var(--spacing-sm);
  }

  .post-content ul,
  .post-content ol {
    margin-left: var(--spacing-base);
    margin-bottom: var(--spacing-sm);
  }

  .post-content code {
    font-size: 0.85rem;
    padding: 1px 4px;
  }

  .post-content pre {
    padding: var(--spacing-sm);
    font-size: 0.8rem;
    border-radius: 4px;
  }

  .post-date {
    font-size: 0.85rem;
    margin: 0 0 var(--spacing-sm) 0;
  }

  .post-header h1 {
    font-size: 1.35rem;
    margin: 0 0 var(--spacing-sm) 0;
    line-height: 1.2;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  .post-content {
    font-size: 0.95rem;
    line-height: 1.7;
  }

  .post-content h1 {
    font-size: 1.2rem;
    margin: var(--spacing-md) 0 var(--spacing-sm) 0;
  }

  .post-content h2 {
    font-size: 1.05rem;
    margin: var(--spacing-md) 0 var(--spacing-sm) 0;
  }

  .post-content h3 {
    font-size: 0.95rem;
    margin: var(--spacing-base) 0 var(--spacing-sm) 0;
  }

  .post-content p {
    margin-bottom: var(--spacing-sm);
  }

  .post-content ul,
  .post-content ol {
    margin-left: var(--spacing-base);
    margin-bottom: var(--spacing-sm);
  }

  .post-content li {
    margin-bottom: var(--spacing-xs);
  }

  .post-content code {
    font-size: 0.8rem;
    padding: 1px 3px;
  }

  .post-content pre {
    padding: var(--spacing-sm);
    font-size: 0.75rem;
    border-radius: 4px;
    margin-bottom: var(--spacing-sm);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .post-tags {
    margin-top: var(--spacing-sm);
  }

  .post-tags .tag {
    font-size: 0.75rem;
    padding: 0.15rem 0.4rem;
  }

  .post-footer {
    padding-top: var(--spacing-base);
    margin-top: var(--spacing-lg);
  }

  .back-link {
    font-size: 0.95rem;
  }

  .toc-nav h3 {
    font-size: 0.85rem;
  }

  .toc-nav a {
    font-size: 0.8rem;
    padding: 0.2rem 0;
  }

  .container {
    padding: 0 var(--spacing-sm);
    margin: var(--spacing-base) auto;
  }

  .blogs-section {
    padding: 1.5rem var(--spacing-sm);
  }

  .month-row {
    margin-bottom: 2rem;
  }

  .month-label {
    font-size: 0.9rem;
    padding-right: 0;
    margin-bottom: 0.5rem;
  }

  .post-list {
    padding-left: 0;
    gap: 1rem;
  }

  .post-item h2 {
    font-size: 1rem;
  }

  .post-meta {
    font-size: 0.8rem;
  }

  .about-right h1 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-base);
  }

  .page-content {
    font-size: 0.95rem;
  }

  .articles-section h1,
  .taxonomy-page h1,
  .terms-page h1 {
    font-size: 1.5rem;
  }
}

/* ============================================ */
/* BLOG LIST LAYOUT                            */
/* ============================================ */

.blogs-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 1.25rem;
}

.blogs-section h1 {
  font-size: 2rem;
  font-weight: 500;
  margin-bottom: 4rem;
}

/* Year group spacing */
.year-group {
  margin-bottom: 4.5rem;
}

/* Month row: 1:1 layout */
.month-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: start;
  margin-bottom: 3.5rem;
}

/* LEFT COLUMN */
.month-label {
  padding-right: 3.5rem;
  text-align: left;
  color: #777;
  font-size: 1rem;
  line-height: 1.4;
}

.month-label .year {
  display: block;
  font-weight: 500;
}

.month-label .month {
  display: block;
}

/* RIGHT COLUMN */
.post-list {
  padding-left: 3.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

/* Post item */
.post-item h2 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 500;
  line-height: 1.4;
}

.post-item a {
  color: #111;
  text-decoration: none;
}

.post-item a:hover {
  text-decoration: underline;
}

/* Meta text */
.post-meta {
  margin-top: 0.3rem;
  font-size: 0.85rem;
  color: #999;
}

/* -----------------------------
   Responsive (Mobile)
-------------------------------- */

@media (max-width: 768px) {
  .blogs-section {
    padding: 2.5rem 1rem;
  }

  .month-row {
    grid-template-columns: 1fr;
    margin-bottom: 2.5rem;
  }

  .month-label {
    text-align: left;
    padding-right: 0;
    margin-bottom: 0.75rem;
  }

  .post-list {
    padding-left: 0;
    gap: 1.25rem;
  }

  .blogs-section h1 {
    margin-bottom: 2.5rem;
  }

  table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  table th,
  table td {
    padding: 0.4rem;
    font-size: 0.9rem;
  }
}