/* ==========================================================================
   ADVANCED SEARCH – FULL STYLESHEET (matches your PHP/HTML classes)
   Uses design tokens: --brand-* and --surface-* (no legacy vars)
   ========================================================================== */

/* 1) PAGE & CONTAINERS ---------------------------------------------------- */

.advanced-search-page { background: var(--surface-0); min-height: 100vh; }
.advanced-search-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* 2) BREADCRUMB ----------------------------------------------------------- */

.advanced-search-breadcrumb {
  background: var(--surface-50);
  padding: 16px 0;
  border-bottom: 1px solid var(--surface-200);
}
.advanced-search-breadcrumb-link {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--brand-primary);
  text-decoration: none;
  font-family: var(--font-body); font-size: 14px; font-weight: 600;
  transition: transform .2s ease, color .2s ease;
}
.advanced-search-breadcrumb-link:hover { color: var(--brand-primary-2); transform: translateX(-2px); }

/* 3) HEADER --------------------------------------------------------------- */

.advanced-search-header {
  background: var(--surface-0);
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--surface-200);
}
.advanced-search-header-content { text-align: center; margin-bottom: 48px; }

.advanced-search-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--brand-primary-soft);
  border: 2px solid var(--brand-primary);
  color: var(--brand-primary);
  padding: 12px 24px; border-radius: 999px;
  font-family: var(--font-body); font-size: 12px; font-weight: 800;
  letter-spacing: .08em; text-transform: uppercase;
  margin-bottom: 24px;
}

.advanced-search-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700; line-height: 1.1;
  color: var(--surface-900);
  margin: 0 0 16px;
}
.advanced-search-highlight-teal { color: var(--brand-primary); position: relative; }
.advanced-search-highlight-teal::after {
  content: ""; position: absolute; left: -2px; right: -2px; bottom: -2px; height: 3px;
  background: var(--brand-primary); opacity: .3; border-radius: 2px;
}

.advanced-search-description {
  font-family: var(--font-body); font-size: clamp(1.125rem, 1.5vw, 1.25rem);
  color: var(--surface-600); line-height: 1.6;
  max-width: 700px; margin: 0 auto 32px;
}

/* Popular searches */
.advanced-search-popular-searches { margin-bottom: 24px; }
.advanced-search-popular-label {
  font-family: var(--font-body); font-size: 14px; color: var(--surface-600); margin-bottom: 12px;
}
.advanced-search-popular-buttons { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.advanced-search-suggestion-btn {
  padding: 6px 12px; border-radius: 20px;
  background: var(--surface-100); border: 1px solid var(--surface-200);
  font-family: var(--font-body); font-size: 12px; color: var(--surface-600);
  cursor: pointer; transition: all .2s ease;
}
.advanced-search-suggestion-btn:hover { background: var(--brand-primary-soft); border-color: var(--brand-primary); color: var(--brand-primary); }

/* 4) SEARCH FORM ---------------------------------------------------------- */

.advanced-search-form {
  background: var(--surface-50); border: 2px solid var(--surface-200);
  border-radius: 12px; padding: 32px; max-width: 900px; margin: 0 auto;
}
.advanced-search-input-group { position: relative; margin-bottom: 24px; }
.advanced-search-icon {
  position: absolute; left: 20px; top: 50%; transform: translateY(-50%);
  color: var(--surface-600); font-size: 18px; pointer-events: none;
}
.advanced-search-input {
  width: 100%; padding: 20px 56px; box-sizing: border-box;
  border: 2px solid var(--surface-200); border-radius: 8px; background: var(--surface-0);
  font-family: var(--font-body); font-size: 16px; color: var(--surface-900);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.advanced-search-input:focus {
  outline: none; border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px var(--brand-primary-transparent);
}
.advanced-clear-btn {
  position: absolute; right: 16px; top: 50%; transform: translateY(-50%);
  background: none; border: 0; color: var(--surface-600); font-size: 16px; cursor: pointer;
  padding: 4px; transition: color .2s ease;
}
.advanced-clear-btn:hover { color: var(--brand-red, #e00034); }

/* Controls row */
.advanced-search-controls {
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
}
.advanced-search-controls-left, .advanced-search-controls-right { display: flex; align-items: center; gap: 16px; }

.advanced-filters-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px; border-radius: 8px;
  background: var(--surface-0); color: var(--brand-primary); border: 2px solid var(--brand-primary);
  font-family: var(--font-body); font-size: 14px; font-weight: 700; cursor: pointer; transition: all .2s ease;
}
.advanced-filters-btn:hover, .advanced-filters-btn.active { background: var(--brand-primary); color: var(--surface-0); }

.advanced-filters-count {
  display: inline-flex; align-items: center; justify-content: center;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--brand-secondary); color: var(--surface-0);
  font-size: 10px; font-weight: 800; margin-left: 6px;
}

.advanced-clear-all-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: 6px;
  background: var(--surface-0); color: var(--surface-600); border: 1px solid var(--surface-200);
  font-family: var(--font-body); font-size: 12px; cursor: pointer; transition: all .2s ease;
}
.advanced-clear-all-btn:hover { background: rgba(224,0,52,0.08); color: var(--brand-red, #e00034); border-color: var(--brand-red, #e00034); }

.advanced-sort-select {
  padding: 8px 12px; border: 1px solid var(--surface-200); border-radius: 6px;
  background: var(--surface-0); color: var(--surface-900);
  font-family: var(--font-body); font-size: 12px; cursor: pointer;
  transition: border-color .2s ease;
}
.advanced-sort-select:focus { outline: none; border-color: var(--brand-primary); }

/* Filters panel */
.advanced-filters-panel {
  display: none; /* toggled by JS */
  background: var(--surface-0); border: 1px solid var(--surface-200);
  border-radius: 8px; padding: 24px; margin-top: 24px;
}
.advanced-filters-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px,1fr)); gap: 16px; }
.advanced-filter-group { display: flex; flex-direction: column; gap: 8px; }
.advanced-filter-group label {
  font-family: var(--font-body); font-size: 12px; font-weight: 700; color: var(--surface-900);
  text-transform: uppercase; letter-spacing: .04em;
}
.advanced-filter-group select {
  appearance: none; padding: 10px 12px;
  background: var(--surface-0); color: var(--surface-900);
  border: 1px solid var(--surface-200); border-radius: 6px;
  font-family: var(--font-body); font-size: 14px; transition: border-color .2s ease, box-shadow .2s ease;
}
.advanced-filter-group select:focus {
  outline: none; border-color: var(--brand-primary); box-shadow: 0 0 0 2px var(--brand-primary-transparent);
}

/* 5) RESULTS SECTION ------------------------------------------------------ */

.advanced-search-results { background: var(--surface-50); padding: 48px 0 80px; }

.advanced-results-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 32px; padding: 20px 24px;
  background: var(--surface-0); border: 1px solid var(--surface-200); border-radius: 8px;
}
#advancedResultsCount {
  font-family: var(--font-heading); font-weight: 600; color: var(--surface-900);
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

/* Loading */
.advanced-loading { text-align: center; padding: 60px 0; color: var(--brand-primary); }

/* Grid */
.advanced-results-grid {
  display: grid; grid-template-columns: repeat(auto-fill,minmax(350px,1fr));
  gap: 24px;
}

/* Card */
.advanced-result-card {
  background: var(--surface-0);
  border: 1px solid var(--surface-200);
  border-radius: 8px; padding: 24px;
  border-left: 4px solid var(--brand-primary);
  transition: transform .2s ease, box-shadow .2s ease, border-left-color .2s ease, background-color .2s ease;
}
.advanced-result-card:hover {
  background: var(--surface-50);
  border-left-color: var(--brand-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg, 0 10px 15px rgba(0,0,0,.1));
}

/* Card meta */
.advanced-result-meta { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
.advanced-result-meta-left { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

.advanced-result-category {
  padding: 4px 8px; border-radius: 12px; background: var(--brand-primary-soft); color: var(--brand-primary);
  font-size: 10px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
}
.advanced-result-difficulty { padding: 4px 8px; border-radius: 12px; font-size: 10px; font-weight: 700; text-transform: uppercase; color: var(--surface-0); }
.advanced-difficulty-beginner { background: var(--brand-green); }
.advanced-difficulty-intermediate { background: var(--brand-secondary); }
.advanced-difficulty-advanced { background: var(--brand-red, #e00034); }

.advanced-result-date { font-family: var(--font-body); font-size: 12px; color: var(--surface-600); }

/* Title & excerpt */
.advanced-result-title {
  font-family: var(--font-heading); font-size: 20px; line-height: 1.3;
  font-weight: 700; color: var(--surface-900); margin: 0 0 8px;
}
.advanced-result-title a { color: inherit; text-decoration: none; }
.advanced-result-title a:hover { color: var(--brand-primary); }

.advanced-result-excerpt {
  font-family: var(--font-body); font-size: 14px; line-height: 1.6;
  color: var(--surface-600); margin: 0 0 16px;
}

/* Footer */
.advanced-result-footer {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 12px; border-top: 1px solid var(--surface-200);
}
.advanced-result-footer-left { display: flex; gap: 16px; align-items: center; }
.advanced-result-author, .advanced-result-reading-time {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-body); font-size: 12px; color: var(--surface-600);
}

/* 6) NO RESULTS ----------------------------------------------------------- */

.advanced-no-results {
  display: none; /* toggled by JS */
  text-align: center; padding: 80px 24px;
  background: var(--surface-0); border-radius: 12px; border: 1px solid var(--surface-200);
}
.advanced-no-results i { font-size: 48px; color: var(--surface-600); margin-bottom: 24px; display: block; }
.advanced-no-results h3 { font-family: var(--font-heading); color: var(--surface-900); margin-bottom: 16px; }
.advanced-no-results p { font-family: var(--font-body); color: var(--surface-600); max-width: 500px; margin: 0 auto 32px; }

.advanced-btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--surface-0); color: var(--brand-secondary);
  border: 2px solid var(--brand-secondary);
  padding: 12px 24px; border-radius: 8px;
  font-family: var(--font-body); font-weight: 700; cursor: pointer; transition: all .2s ease;
}
.advanced-btn-secondary:hover { background: var(--brand-secondary); color: var(--surface-0); transform: translateY(-2px); }

/* 7) PAGINATION ----------------------------------------------------------- */

.advanced-pagination { margin-top: 48px; }
.advanced-pagination .advanced-pagination-container {
  display: flex; justify-content: center; align-items: center; gap: 8px;
  padding-top: 32px; border-top: 1px solid var(--surface-200);
}
.advanced-pagination .advanced-pagination-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 12px 16px; border-radius: 8px;
  background: var(--surface-0); color: var(--surface-900);
  border: 1px solid var(--surface-200);
  font-family: var(--font-body); font-size: 14px; font-weight: 600;
  cursor: pointer; transition: all .2s ease;
}
.advanced-pagination .advanced-pagination-btn:hover {
  background: var(--brand-primary-soft); border-color: var(--brand-primary); color: var(--brand-primary);
}
.advanced-pagination .advanced-pagination-numbers { display: flex; gap: 4px; }
.advanced-pagination .advanced-pagination-number {
  padding: 10px 14px; min-width: 40px; text-align: center;
  border: 1px solid var(--surface-200); border-radius: 6px;
  background: var(--surface-0); color: var(--surface-900);
  font-family: var(--font-body); font-size: 14px; font-weight: 600;
  cursor: pointer; transition: all .2s ease;
}
.advanced-pagination .advanced-pagination-number:hover {
  background: var(--brand-primary-soft); border-color: var(--brand-primary); color: var(--brand-primary);
}
.advanced-pagination .advanced-pagination-number.active {
  background: var(--brand-primary); color: var(--surface-0); border-color: var(--brand-primary);
}

/* 8) RESPONSIVE ----------------------------------------------------------- */

@media (max-width: 768px) {
  .advanced-search-container { padding: 0 16px; }
  .advanced-search-form { padding: 24px 16px; }
  .advanced-search-input { padding: 16px 48px; }
  .advanced-results-grid { grid-template-columns: 1fr; gap: 16px; }
  .advanced-results-header { flex-direction: column; align-items: flex-start; gap: 12px; }
  .advanced-result-meta { flex-direction: column; align-items: flex-start; gap: 8px; }
  .advanced-result-footer { flex-direction: column; align-items: flex-start; gap: 8px; }
}

/* 9) ACCESSIBILITY -------------------------------------------------------- */

.advanced-search-input:focus,
.advanced-filter-group select:focus,
.advanced-sort-select:focus {
  outline: 2px solid var(--brand-primary);
  outline-offset: 2px;
}

/* 10) UTILS --------------------------------------------------------------- */

.fa-spin { animation: spin 1s linear infinite; }
@keyframes spin { from { transform: rotate(0deg);} to { transform: rotate(360deg);} }