/*
 * Krona Mag - Archive Stylesheet
 * Version: 0.1.0
 * Description: Archive, blog/insights, search results, 404 page.
 *
 * Sections:
 *   1. Archive Grid Layout
 *   2. Archive Empty State
 *   3. Blog Filters
 *   4. Search Empty State
 *   5. 404 Page
 *   6. Responsive
 */

/* =============================================
   1. ARCHIVE GRID LAYOUT
   3-column grid for archive and search pages
   ============================================= */

/* Posts grid - 3 columns */
.km-archive-grid {
  display: grid;
  grid-template-columns: repeat( 3, 1fr );
  gap: 24px;
}

/* Blog grid - same as archive */
.km-blog-grid {
  display: grid;
  grid-template-columns: repeat( 3, 1fr );
  gap: 24px;
}

/* =============================================
   2. ARCHIVE EMPTY STATE
   Shown when no posts found
   ============================================= */

.km-archive-empty {
  padding: 48px;
  text-align: center;
  color: var(--km-text-muted);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* =============================================
   3. BLOG FILTERS
   Category filter tabs for blog/insights page
   ============================================= */

.km-blog-filters {
  background: transparent;
  border-bottom: 1px solid var(--km-border);
  padding: 16px 0;
  margin-top: 24px;
  margin-bottom: 40px;
  position: sticky;
  top: 64px;
  z-index: 90;
}

.km-blog-filter-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

/* Filter button */
.km-filter-btn {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  color: var(--km-text-muted);
  border: 1px solid var(--km-border);
  background: none;
  cursor: pointer;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  transition: all 0.2s;
  white-space: nowrap;
}

.km-filter-btn:hover,
.km-filter-active {
  background: var(--km-accent) !important;
  color: #fff !important;
  border-color: var(--km-accent) !important;
}

/* =============================================
   4. SEARCH EMPTY STATE
   Shown when no search results found
   ============================================= */

.km-search-empty {
  padding: 64px 32px;
  text-align: center;
  background: var(--km-surface);
  border: 1px solid var(--km-border);
  border-radius: var(--km-radius-lg);
}

.km-search-empty-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--km-bg);
  border: 2px solid var(--km-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--km-text-muted);
  margin: 0 auto 24px;
}

.km-search-empty-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--km-text);
  margin: 0 0 12px;
  font-family: 'Playfair Display', Georgia, serif;
}

.km-search-empty-text {
  font-size: 15px;
  color: var(--km-text-muted);
  margin: 0 auto 32px;
  font-family: Georgia, serif;
  line-height: 1.7;
  max-width: 400px;
}

.km-search-empty-form {
  display: flex;
  max-width: 440px;
  margin: 0 auto 20px;
  border: 1.5px solid var(--km-border);
  border-radius: var(--km-radius);
  overflow: hidden;
  transition: border-color 0.2s;
}

.km-search-empty-form:focus-within {
  border-color: var(--km-accent);
}

.km-search-empty-input {
  flex: 1;
  border: none;
  padding: 12px 16px;
  font-size: 14px;
  background: transparent;
  color: var(--km-text);
  outline: none;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.km-search-empty-btn {
  background: var(--km-accent);
  border: none;
  padding: 12px 20px;
  cursor: pointer;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.2s;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.km-search-empty-btn:hover {
  background: var(--km-accent-dark);
}

.km-search-empty-home {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--km-text-muted);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: color 0.2s;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.km-search-empty-home:hover {
  color: var(--km-accent);
}

/* =============================================
   5. 404 PAGE
   Error page with search + categories + latest posts
   ============================================= */

.km-404-wrap {
  padding: 80px 0;
}

/* Big 404 number + message */
.km-404-hero {
  text-align: center;
  padding: 64px 0;
  max-width: 600px;
  margin: 0 auto;
}

.km-404-number {
  display: block;
  font-size: 120px;
  font-weight: 700;
  color: var(--km-border);
  line-height: 1;
  font-family: 'Playfair Display', Georgia, serif;
  margin-bottom: 16px;
}

.km-404-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--km-text);
  margin: 0 0 16px;
  font-family: 'Playfair Display', Georgia, serif;
}

.km-404-text {
  font-size: 16px;
  color: var(--km-text-muted);
  line-height: 1.7;
  margin: 0 0 32px;
  font-family: Georgia, serif;
}

/* Search box inside 404 */
.km-404-search {
  display: flex;
  max-width: 480px;
  margin: 0 auto 24px;
  border: 1.5px solid var(--km-border);
  border-radius: var(--km-radius);
  overflow: hidden;
  transition: border-color 0.2s;
}

.km-404-search:focus-within {
  border-color: var(--km-accent);
}

.km-404-search-input {
  flex: 1;
  border: none;
  padding: 12px 16px;
  font-size: 14px;
  background: transparent;
  color: var(--km-text);
  outline: none;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.km-404-search-btn {
  background: var(--km-accent);
  border: none;
  padding: 12px 20px;
  cursor: pointer;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.2s;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.km-404-search-btn:hover {
  background: var(--km-accent-dark);
}

.km-404-home-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--km-text-muted);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: color 0.2s;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.km-404-home-btn:hover {
  color: var(--km-accent);
}

/* Section titles inside 404 */
.km-404-section-title {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--km-accent);
  margin-bottom: 24px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* Categories section */
.km-404-cats {
  margin-bottom: 64px;
  padding-top: 48px;
  border-top: 1px solid var(--km-border);
}

.km-404-cats-grid {
  display: grid;
  grid-template-columns: repeat( 3, 1fr );
  gap: 16px;
}

.km-404-cat-card {
  background: var(--km-surface);
  border: 1px solid var(--km-border);
  border-radius: var(--km-radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-decoration: none;
  transition: box-shadow 0.2s, transform 0.2s, border-color 0.2s;
}

.km-404-cat-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transform: translateY( -2px );
  border-color: var(--km-accent);
}

.km-404-cat-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--km-text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.km-404-cat-count {
  font-size: 12px;
  color: var(--km-text-muted);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* Latest posts section */
.km-404-posts {
  padding-top: 48px;
  border-top: 1px solid var(--km-border);
}

/* =============================================
   6. RESPONSIVE
   ============================================= */

@media ( max-width: 1024px ) {
  .km-archive-grid,
  .km-blog-grid {
    grid-template-columns: repeat( 2, 1fr );
  }
}

@media ( max-width: 768px ) {
  .km-archive-grid,
  .km-blog-grid {
    grid-template-columns: 1fr;
  }
  .km-404-number {
    font-size: 80px;
  }
  .km-404-cats-grid {
    grid-template-columns: repeat( 2, 1fr );
  }
}

@media ( max-width: 480px ) {
  .km-404-cats-grid {
    grid-template-columns: 1fr;
  }
}