/* CSS Variables - Retro CRT-inspired palette */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&family=VT323&display=swap');

:root {
  --bg-primary: #0a0e14;
  --bg-secondary: #121820;
  --bg-card: #1a2230;
  --bg-hover: #232d3f;
  --text-primary: #e8eaed;
  --text-secondary: #9aa5b8;
  --text-muted: #5c6a7e;
  --accent: #4a9eff;
  --accent-hover: #6db3ff;
  --accent-dim: #2d5a8a;
  --border-color: #2a3648;
  --border-light: #3d4f66;

  /* Font families */
  --font-headline: 'VT323', monospace;
  --font-body: 'DM Sans', Georgia, serif;
}

/* Reset and Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-body);
  font-size: 15px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  font-weight: 400;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

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

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

/* Navigation */
.navbar {
  background-color: var(--bg-secondary);
  border-bottom: 2px solid var(--accent-dim);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 1.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 52px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-headline);
  font-size: 1.4rem;
  color: var(--accent);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-logo:hover {
  color: var(--accent-hover);
  text-decoration: none;
}

.nav-logo-icon {
  font-size: 1.25rem;
  display: none;
}

.nav-links {
  display: flex;
  gap: 0.15rem;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 0.45rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-family: var(--font-headline);
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-radius: 2px;
}

.nav-links a:hover {
  color: var(--accent);
  background-color: var(--bg-card);
  text-decoration: none;
}

.nav-links a.active {
  color: var(--text-primary);
  background-color: var(--accent-dim);
  border-bottom: 2px solid var(--accent);
}

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  background: none;
  border: 2px solid var(--border-color);
  border-radius: 2px;
  color: var(--text-primary);
  padding: 0.35rem 0.6rem;
  cursor: pointer;
  font-family: var(--font-headline);
  font-size: 1.2rem;
}

/* Main Content */
.main-content {
  max-width: 980px;
  margin: 0 auto;
  padding: 2.5rem 1.75rem 3rem;
}

/* Callout description text */
.callout-description {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
}

/* Filter Cards Row */
.filter-cards-row {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.filter-cards-row .filter-card {
  flex: 1;
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .filter-cards-row {
    flex-direction: column;
    gap: 1rem;
  }
}

/* Callout Boxes */
.callout-box {
  background-color: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-top: 3px solid var(--accent);
  border-radius: 0 0 4px 4px;
  padding: 1.4rem 1.3rem 1.5rem;
  margin-bottom: 2rem;
}

.callout-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.2rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--border-color);
}

.callout-title {
  font-family: var(--font-headline);
  font-size: 1.2rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.callout-title-icon {
  font-size: 1rem;
  display: none;
}

.view-all-link {
  font-family: var(--font-headline);
  font-size: 1rem;
  text-transform: uppercase;
}

/* Search Box */
.search-container {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.search-input-wrapper {
  position: relative;
}

.search-input {
  width: 100%;
  padding: 0.7rem 1rem 0.7rem 2.4rem;
  background-color: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: 3px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 14px;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent);
  background-color: var(--bg-hover);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-icon {
  position: absolute;
  left: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 14px;
}

/* Filter Sections */
.filter-section {
  margin-bottom: 0.5rem;
}

.filter-section-label {
  display: block;
  font-family: var(--font-headline);
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.filter-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-color) 20%, var(--border-color) 80%, transparent);
  margin: 1rem 0;
}

.clear-filters-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-family: var(--font-headline);
  font-size: 0.8rem;
  text-transform: uppercase;
  padding: 0.3rem 0.7rem;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.clear-filters-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Topic Tags */
.topics-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.topic-tag {
  padding: 0.35rem 0.7rem;
  background-color: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: 2px;
  font-family: var(--font-headline);
  font-size: 0.95rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  cursor: pointer;
}

.topic-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background-color: var(--bg-hover);
}

.topic-tag.active {
  background-color: var(--accent-dim);
  border-color: var(--accent);
  color: var(--text-primary);
}

/* Post Cards */
.posts-feed {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.post-card {
  display: block;
  background-color: var(--bg-card);
  border: 2px solid var(--border-color);
  border-left: 3px solid var(--accent-dim);
  border-radius: 0 3px 3px 0;
  padding: 1rem 1.2rem 1.1rem 1.3rem;
  text-decoration: none;
  color: var(--text-primary);
}

.post-card:hover {
  background-color: var(--bg-hover);
  border-color: var(--border-light);
  border-left-color: var(--accent);
  text-decoration: none;
}

.post-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.4rem;
  gap: 1rem;
}

.post-card-title {
  font-family: var(--font-headline);
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--text-primary);
  line-height: 1.3;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

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

.post-card-date {
  font-family: var(--font-headline);
  font-size: 0.9rem;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.post-card-excerpt {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 0.7rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.55;
}

.post-card-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.post-topic {
  padding: 0.15rem 0.45rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 2px;
  font-family: var(--font-headline);
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* All Posts Page */
.page-header {
  margin-bottom: 1.8rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--border-color);
}

.page-title {
  font-size: 2rem;
  margin-bottom: 0.35rem;
  color: var(--accent);
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: 14px;
}

.filters-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
  margin-bottom: 1.4rem;
  padding: 1rem 1.1rem;
  background-color: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-bottom: 3px solid var(--accent-dim);
  border-radius: 3px 3px 0 0;
  align-items: center;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.filter-label {
  font-family: var(--font-headline);
  font-size: 0.95rem;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.filter-select {
  padding: 0.45rem 0.7rem;
  background-color: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: 2px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 13px;
  cursor: pointer;
}

.filter-select:focus {
  outline: none;
  border-color: var(--accent);
}

.posts-count {
  margin-left: auto;
  font-family: var(--font-headline);
  font-size: 0.95rem;
  color: var(--text-muted);
}

.posts-grid {
  display: grid;
  gap: 0.6rem;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--text-muted);
  border: 2px dashed var(--border-color);
  border-radius: 3px;
}

.empty-state-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  display: none;
}

.empty-state-title {
  font-family: var(--font-headline);
  font-size: 1.3rem;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

/* Filter Cards */
.filter-cards {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.filter-card {
  flex: 1;
  margin-bottom: 0;
}

.filter-card .callout-header {
  margin-bottom: 0.8rem;
  padding-bottom: 0.6rem;
}

.filter-card .topics-filter {
  min-height: 2.5rem;
}

.clear-filter-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-family: var(--font-headline);
  font-size: 0.8rem;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 2px;
  cursor: pointer;
}

.clear-filter-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Placeholder Pages */
.placeholder-content {
  text-align: center;
  padding: 4.5rem 1.75rem;
  border: 2px solid var(--border-color);
  border-top: 4px solid var(--accent);
  border-radius: 0 0 4px 4px;
  background-color: var(--bg-secondary);
}

.placeholder-icon {
  font-size: 3rem;
  margin-bottom: 1.25rem;
  display: none;
}

.placeholder-content h1 {
  font-size: 2.2rem;
  margin-bottom: 0.7rem;
  color: var(--accent);
}

.placeholder-content p {
  color: var(--text-secondary);
  max-width: 440px;
  margin: 0 auto;
  font-size: 15px;
  line-height: 1.65;
}

/* ========================================
   Post Page - Article Styles
======================================== */
.post-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1rem;
}

.post-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.75rem;
  border-bottom: 3px solid var(--accent-dim);
  text-align: center;
}

.back-link {
  display: inline-block;
  margin-bottom: 1.5rem;
  font-family: var(--font-headline);
  font-size: 1.1rem;
  text-transform: uppercase;
  color: var(--text-muted);
}

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

.post-title {
  font-size: 3rem;
  margin-bottom: 1.25rem;
  color: var(--accent);
  line-height: 1.15;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: center;
}

.post-date {
  font-family: var(--font-headline);
  font-size: 1.1rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.post-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

/* Post Content - Markdown Rendered */
.post-content {
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-primary);
}

.post-content h1 {
  font-size: 2.6rem;
  margin: 3rem 0 1.25rem;
  color: var(--accent);
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.6rem;
  text-align: center;
}

.post-content h2 {
  font-size: 2.1rem;
  margin: 2.5rem 0 1rem;
  color: var(--accent);
  text-align: center;
}

.post-content h3 {
  font-size: 1.7rem;
  margin: 2rem 0 0.75rem;
  color: var(--text-primary);
}

.post-content h4 {
  font-size: 1.4rem;
  margin: 1.5rem 0 0.6rem;
  color: var(--text-secondary);
}

.post-content p {
  margin-bottom: 1.5rem;
}

.post-content ul,
.post-content ol {
  margin-bottom: 1.5rem;
  padding-left: 2rem;
}

.post-content li {
  margin-bottom: 0.6rem;
}

.post-content li > ul,
.post-content li > ol {
  margin-top: 0.6rem;
  margin-bottom: 0;
}

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

.post-content em {
  font-style: italic;
  color: var(--text-secondary);
}

.post-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.post-content blockquote {
  border-left: 4px solid var(--accent);
  margin: 2rem 0;
  padding: 1rem 1.5rem;
  background-color: var(--bg-secondary);
  border-radius: 0 4px 4px 0;
  color: var(--text-secondary);
  font-style: italic;
  font-size: 1.1rem;
}

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

.post-content code {
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 0.9em;
  padding: 0.2rem 0.5rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  color: var(--accent);
}

.post-content pre {
  margin: 2rem 0;
  padding: 1.5rem;
  background-color: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-left: 4px solid var(--accent-dim);
  border-radius: 0 4px 4px 0;
  overflow-x: auto;
}

.post-content pre code {
  padding: 0;
  background: none;
  border: none;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-primary);
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  margin: 2rem auto;
  border: 3px solid var(--border-color);
  display: block;
}

.post-content hr {
  border: none;
  border-top: 3px solid var(--accent-dim);
  margin: 3rem auto;
  max-width: 200px;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 1rem;
}

.post-content th,
.post-content td {
  padding: 0.9rem 1.1rem;
  border: 1px solid var(--border-color);
  text-align: left;
}

.post-content th {
  background-color: var(--bg-secondary);
  font-family: var(--font-headline);
  text-transform: uppercase;
  font-weight: 400;
  font-size: 1.1rem;
  color: var(--accent);
}

.post-content tr:nth-child(even) {
  background-color: var(--bg-secondary);
}

/* Loading and Error States */
.loading-spinner {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
  font-family: var(--font-headline);
  text-transform: uppercase;
}

.error-message {
  text-align: center;
  padding: 2rem;
  background-color: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: 4px;
}

.error-message p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.error-detail {
  font-family: monospace;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.btn {
  display: inline-block;
  padding: 0.6rem 1.25rem;
  background-color: var(--accent);
  color: var(--bg-primary);
  font-family: var(--font-headline);
  font-size: 1rem;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 3px;
  transition: background-color 0.2s;
}

.btn:hover {
  background-color: var(--accent-hover);
  text-decoration: none;
}

/* Footer */
.site-footer {
  margin-top: 3.5rem;
  padding: 1.4rem 1.75rem;
  border-top: 2px solid var(--accent-dim);
  text-align: center;
  color: var(--text-muted);
  font-family: var(--font-headline);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.footer {
  margin-top: 3.5rem;
  padding: 1.4rem 1.75rem;
  border-top: 2px solid var(--accent-dim);
  text-align: center;
  color: var(--text-muted);
  font-family: var(--font-headline);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Responsive */
@media (max-width: 640px) {
  .nav-container {
    padding: 0 1rem;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 52px;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    flex-direction: column;
    padding: 0.6rem;
    border-bottom: 2px solid var(--accent-dim);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 0.7rem 1rem;
    border-radius: 2px;
  }

  .nav-toggle {
    display: block;
  }

  .main-content {
    padding: 1.6rem 1rem 2rem;
  }

  .filter-cards {
    flex-direction: column;
  }

  .disclaimer-content {
    flex-direction: column;
    gap: 0.7rem;
  }

  .post-card-header {
    flex-direction: column;
    gap: 0.3rem;
  }

  .filters-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 0.8rem;
  }

  .filter-group {
    justify-content: space-between;
  }

  .filter-select {
    flex: 1;
  }

  .posts-count {
    margin-left: 0;
    text-align: center;
    padding-top: 0.6rem;
    border-top: 1px solid var(--border-color);
  }

  .placeholder-content {
    padding: 3rem 1.25rem;
  }

  .placeholder-content h1 {
    font-size: 1.8rem;
  }

  /* Post page responsive */
  .post-title {
    font-size: 2.2rem;
  }

  .post-content {
    font-size: 16px;
  }

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

  .post-content h2 {
    font-size: 1.7rem;
  }

  .post-content h3 {
    font-size: 1.4rem;
  }

  .post-content h4 {
    font-size: 1.2rem;
  }
}

/* Utility Classes */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}