/* ============================================
   Cherie's Tech Blog — Custom Theme
   Pantone Palette: Cloud Dancer, Veiled Vista,
   Baltic Sea, Golden Mist, Quiet Violet,
   Cloud Cover, Hematite, Blue Fusion
   ============================================ */

/* --- CSS Variables (Pantone Palette) --- */
:root {
  /* Pantone 11-4201 Cloud Dancer — primary background */
  --color-bg: #F0EEE9;
  --color-surface: #FAFAF8;
  --color-surface-hover: #FFFFFF;

  /* Pantone 18-4218 Blue Fusion — primary text & headings */
  --color-text: #3D4F63;
  /* Pantone 17-5800 Hematite — secondary text */
  --color-text-muted: #8B8477;
  /* Pantone 16-1523 Cloud Cover — light text, captions */
  --color-text-light: #ADA09A;

  /* Pantone 14-4320 Baltic Sea — primary accent (links, CTA) */
  --color-accent: #7EB6D9;
  --color-accent-hover: #5A9BC5;
  --color-accent-light: rgba(126, 182, 217, 0.12);

  /* Pantone 16-3610 Quiet Violet — secondary accent */
  --color-accent-secondary: #A693B2;
  --color-accent-secondary-light: rgba(166, 147, 178, 0.12);

  /* Pantone 13-0624 Golden Mist — highlights & special accents */
  --color-highlight: #D4CC8E;
  --color-highlight-light: rgba(212, 204, 142, 0.2);

  /* Pantone 12-6000 Veiled Vista — code & block backgrounds */
  --color-code-bg: #EDF5ED;
  --color-code-border: #D5E8D4;

  /* Pantone 16-1523 Cloud Cover — borders */
  --color-border: #D5CFC8;

  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  --max-width: 780px;
  --header-height: 72px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(61, 79, 99, 0.05), 0 1px 2px rgba(61, 79, 99, 0.08);
  --shadow-md: 0 4px 14px rgba(61, 79, 99, 0.08), 0 2px 4px rgba(61, 79, 99, 0.05);
  --shadow-lg: 0 10px 40px rgba(61, 79, 99, 0.10);
  --transition: 0.25s ease;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 17px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-accent-hover);
}

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

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(240, 238, 233, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text);
  text-decoration: none;
  transition: opacity var(--transition);
}

.site-logo:hover {
  opacity: 0.8;
  color: var(--color-text);
}

.logo-icon {
  font-family: var(--font-mono);
  color: var(--color-accent-secondary);
  font-size: 1.3rem;
}

.site-nav {
  display: flex;
  gap: 0.25rem;
}

.nav-link {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.nav-link:hover {
  color: var(--color-accent);
  background: var(--color-accent-light);
}

.nav-link.active {
  color: var(--color-accent-secondary);
  background: var(--color-accent-secondary-light);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* --- Main --- */
.site-main {
  flex: 1;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem;
}

/* --- Homepage Grid Layout --- */
.homepage {
  padding: 3rem 0;
}

.homepage-grid {
  display: grid;
  grid-template-columns: 55% 1fr;
  gap: 2.5rem;
  align-items: start;
}

/* Featured Post (Left Column) */
.featured-post {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.featured-post::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-secondary), var(--color-highlight));
}

.featured-post:hover {
  box-shadow: var(--shadow-md);
}

.featured-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.featured-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.featured-category-badge {
  font-size: 0.78rem;
  padding: 0.3rem 0.75rem;
  background: var(--color-accent-light);
  border-radius: 20px;
  color: var(--color-accent);
  font-weight: 600;
  transition: all var(--transition);
}

.featured-category-badge:hover {
  background: var(--color-accent);
  color: #FFFFFF;
}

.featured-title {
  font-size: 1.85rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.featured-title a {
  color: var(--color-text);
  transition: color var(--transition);
}

.featured-title a:hover {
  color: var(--color-accent);
}

.featured-summary {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 1.5rem;
}

.featured-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--color-text-light);
  margin-bottom: 1.5rem;
}

.featured-meta .separator {
  color: var(--color-border);
}

.featured-cta {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.6rem;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-secondary));
  color: #FFFFFF;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}

.featured-cta:hover {
  background: linear-gradient(135deg, var(--color-accent-hover), #8E7BA0);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Latest Posts (Right Column) */
.latest-posts {
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  padding: 2rem;
}

.latest-posts-heading {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
  position: relative;
  display: inline-block;
  color: var(--color-text);
}

.latest-posts-heading::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 36px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-highlight));
  border-radius: 2px;
}

.latest-post-item {
  display: block;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition);
  color: inherit;
  text-decoration: none;
}

.latest-post-item:first-of-type {
  padding-top: 0.75rem;
}

.latest-post-item:last-of-type {
  border-bottom: none;
}

.latest-post-item:hover {
  color: inherit;
}

.latest-post-item:hover .latest-post-title {
  color: var(--color-accent);
}

.latest-post-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--color-text-light);
  margin-bottom: 0.35rem;
}

.latest-post-category {
  color: var(--color-accent-secondary);
  font-weight: 600;
}

.latest-post-category::before {
  content: '/';
  margin-right: 0.5rem;
  color: var(--color-border);
}

.latest-post-title {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 0.25rem;
  color: var(--color-text);
  transition: color var(--transition);
}

.latest-post-summary {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}

.view-all-link {
  display: inline-block;
  margin-top: 1.25rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-accent);
  transition: all var(--transition);
}

.view-all-link:hover {
  color: var(--color-accent-hover);
  letter-spacing: 0.02em;
}

/* --- Section Title (reused on other pages) --- */
.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 2rem;
  letter-spacing: -0.01em;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-highlight));
  border-radius: 2px;
}

/* --- Post Meta (shared) --- */
.post-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.82rem;
  color: var(--color-text-light);
  margin-bottom: 0.75rem;
}

.read-more {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
  transition: all var(--transition);
}

.read-more:hover {
  color: var(--color-accent-hover);
  letter-spacing: 0.02em;
}

/* --- Post List (Section Page) --- */
.post-list-page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 0;
}

.page-header {
  margin-bottom: 3rem;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-description {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

.post-list-item {
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--color-border);
}

.post-list-item:first-child {
  padding-top: 0;
}

.post-list-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin: 0.5rem 0;
}

.post-list-title a {
  color: var(--color-text);
  transition: color var(--transition);
}

.post-list-title a:hover {
  color: var(--color-accent);
}

.post-list-summary {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

/* --- Single Post --- */
.single-post {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.post-header {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
}

.post-title {
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
}

.post-header .post-meta {
  font-size: 0.9rem;
}

.separator {
  color: var(--color-text-light);
}

/* --- Table of Contents --- */
.table-of-contents {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  margin-bottom: 2.5rem;
}

.table-of-contents h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.table-of-contents ul {
  list-style: none;
  padding: 0;
}

.table-of-contents li {
  margin: 0.35rem 0;
}

.table-of-contents li ul {
  padding-left: 1.25rem;
}

.table-of-contents a {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.table-of-contents a:hover {
  color: var(--color-accent);
}

/* --- Post Content Typography --- */
.post-content h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
  letter-spacing: -0.01em;
  color: var(--color-text);
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-highlight);
}

.post-content h3 {
  font-size: 1.3rem;
  color: var(--color-accent-secondary);
  font-weight: 600;
  margin: 2rem 0 0.75rem;
}

.post-content h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
}

.post-content p {
  margin-bottom: 1.25rem;
}

.post-content ul,
.post-content ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.post-content li {
  margin-bottom: 0.4rem;
}

.post-content blockquote {
  border-left: 4px solid var(--color-accent-secondary);
  background: var(--color-accent-secondary-light);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--color-text-muted);
}

.post-content strong {
  font-weight: 600;
}

/* --- Inline Code --- */
.post-content code {
  font-family: var(--font-mono);
  background: var(--color-code-bg);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.85em;
  border: 1px solid var(--color-code-border);
}

/* --- Code Blocks --- */
.post-content .highlight {
  margin: 1.5rem 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-code-border);
}

.post-content .highlight pre {
  margin: 0;
  padding: 1.25rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.65;
  background: var(--color-code-bg) !important;
  tab-size: 4;
}

.post-content .highlight pre code {
  background: none;
  padding: 0;
  border: none;
  font-size: inherit;
}

/* Line numbers table */
.post-content .highlight table {
  width: 100%;
  border-collapse: collapse;
}

.post-content .highlight .lnt,
.post-content .highlight .ln {
  color: var(--color-text-light);
  padding-right: 1.25rem;
  user-select: none;
  text-align: right;
  min-width: 2.5rem;
}

.post-content .highlight td {
  padding: 0;
  vertical-align: top;
}

.post-content .highlight td:last-child {
  width: 100%;
}

/* --- Images & Figures --- */
.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin: 1.5rem auto;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.post-content figure {
  margin: 2rem 0;
  text-align: center;
}

.post-content figure img {
  margin: 0 auto 0.75rem;
}

.post-content figcaption {
  font-size: 0.85rem;
  color: var(--color-text-light);
  font-style: italic;
  margin-top: 0.75rem;
}

/* --- Tables in Content --- */
.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.post-content th {
  background: var(--color-code-bg);
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--color-highlight);
}

.post-content td {
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

.post-content tr:hover td {
  background: var(--color-highlight-light);
}

/* --- Post Footer & Navigation --- */
.post-footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.post-nav-link {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem 1.25rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.post-nav-link:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.post-nav-link.next {
  text-align: right;
}

.post-nav-link .label {
  font-size: 0.8rem;
  color: var(--color-text-light);
  font-weight: 500;
}

.post-nav-link .title {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text);
}

/* --- Pagination --- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.pagination li {
  list-style: none;
}

.page-item .page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  height: 2.5rem;
  padding: 0 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.page-item .page-link:hover,
.page-item.active .page-link {
  background: var(--color-accent);
  color: #FFFFFF;
  border-color: var(--color-accent);
}

/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
  margin-top: 2rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer-powered {
  font-size: 0.82rem;
  color: var(--color-text-light);
}

.footer-powered a {
  font-weight: 600;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  html {
    font-size: 16px;
  }

  .header-inner {
    padding: 0 1.25rem;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 1rem;
  }

  .site-nav.active {
    display: flex;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .site-main {
    padding: 1.25rem;
  }

  .homepage-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .featured-title {
    font-size: 1.5rem;
  }

  .featured-post {
    padding: 1.75rem;
  }

  .post-title {
    font-size: 1.8rem;
  }

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

  .footer-inner {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
    padding: 0 1.25rem;
  }

  .post-content .highlight pre {
    font-size: 0.78rem;
    padding: 1rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.6rem;
  }

  .post-title {
    font-size: 1.5rem;
  }

  .section-title {
    font-size: 1.3rem;
  }
}

/* --- Shortcodes: Info & Chat --- */
.info-block {
  background: var(--color-accent-light);
  border-left: 4px solid var(--color-accent);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text);
}

.author-chat-block {
  background: var(--color-accent-secondary-light);
  border-left: 4px solid var(--color-accent-secondary);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text);
  font-style: italic;
}

/* --- Category Badges --- */
.category-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.category-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition);
}

.category-badge:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
  color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.category-count {
  background: var(--color-highlight-light);
  color: var(--color-text-muted);
  padding: 0.15rem 0.5rem;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
}

/* --- Post Categories (on post pages) --- */
.post-categories {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.post-categories a {
  font-size: 0.8rem;
  padding: 0.25rem 0.65rem;
  background: var(--color-accent-light);
  border-radius: 20px;
  color: var(--color-accent);
  font-weight: 500;
  transition: all var(--transition);
}

.post-categories a:hover {
  background: var(--color-accent);
  color: #FFFFFF;
}