:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-hover: #f1f5f9;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --text: #1e293b;
  --text-secondary: #64748b;
  --accent: #2563eb;
  --accent-light: #dbeafe;
  --accent-hover: #1d4ed8;
  --accent-warm: #d97706;
  --accent-warm-light: #fef3c7;
  --tag-cc: #16a34a;
  --tag-oc: #ea580c;
  --tag-cx: #7c3aed;
  --tag-mcp: #db2777;
  --tag-oai: #2563eb;
  --tag-tool: #64748b;
  --dim-target: #ea580c;
  --dim-technique: #0891b2;
  --dim-form: #7c3aed;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.04);
  --radius: 12px;
  --radius-sm: 8px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Hero ──────────────────────────────────────────────────────── */

.hero {
  background: linear-gradient(135deg, #eff6ff 0%, #f8fafc 50%, #faf5ff 100%);
  border-bottom: 1px solid var(--border);
  padding: 32px 0 24px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  color: var(--accent);
  text-align: center;
  margin-bottom: 10px;
  font-weight: 600;
}

.hero h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  text-align: center;
  line-height: 1.15;
  margin-bottom: 10px;
  font-weight: 800;
  color: var(--text);
}

.subtitle {
  max-width: 700px;
  text-align: center;
  color: var(--text-secondary);
  margin: 0 auto 4px;
  font-size: 0.95rem;
}

.subtitle-sm {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-style: italic;
  margin-bottom: 16px;
}

.hero-panels {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 0 auto 16px;
}

.info-panel {
  padding: 14px 16px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.info-panel h2 {
  font-size: 0.85rem;
  margin-bottom: 4px;
  font-weight: 700;
  color: var(--text);
}

.info-panel p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.stat-card {
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.stat-card .value {
  display: block;
  font-size: 1.4rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 3px;
  color: var(--accent);
}

.stat-card .label {
  color: var(--text-secondary);
  font-size: 0.78rem;
}

/* ── Toolbar: search + horizontal filters ──────────────────────── */

.toolbar {
  margin-top: 20px;
  margin-bottom: 16px;
}

.search-bar {
  position: relative;
  margin-bottom: 12px;
}

.search-bar input {
  width: 100%;
  padding: 12px 16px;
  padding-right: 120px;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-shadow: var(--shadow-sm);
}

.search-bar input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.search-bar #count {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* Filter bar: horizontal dropdown buttons */
.filter-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.filter-dropdown {
  position: relative;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  font-size: 0.84rem;
  cursor: pointer;
  transition: all 0.15s;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
}

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

.filter-btn.has-selection {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

.filter-btn-arrow {
  font-size: 0.6rem;
  opacity: 0.5;
}

.filter-btn-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
}

.filter-popup {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 240px;
  max-height: 320px;
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  z-index: 100;
  padding: 8px;
}

.filter-popup.open {
  display: block;
}

.filter-popup-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.84rem;
  transition: background 0.1s;
  user-select: none;
}

.filter-popup-item:hover {
  background: var(--surface-hover);
}

.filter-popup-item input {
  width: 15px;
  height: 15px;
  accent-color: var(--accent);
  flex-shrink: 0;
}

.filter-popup-item .label {
  flex: 1;
}

.filter-popup-item .cnt {
  color: var(--text-secondary);
  font-size: 0.76rem;
  min-width: 16px;
  text-align: right;
}

.filter-popup-item .cnt.zero {
  opacity: 0.35;
}

/* Active filter chips */
.active-filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.active-chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.78rem;
}

.active-chip.subtle {
  color: var(--text);
}

.active-chip.dim-target    { border-color: rgba(234, 88, 12, 0.35); color: var(--dim-target); background: #fff7ed; }
.active-chip.dim-technique { border-color: rgba(8, 145, 178, 0.35); color: var(--dim-technique); background: #ecfeff; }
.active-chip.dim-form      { border-color: rgba(124, 58, 237, 0.35); color: var(--dim-form); background: #f5f3ff; }

/* ── Prompt panel (prominent, at top) ──────────────────────────── */

.prompt-panel {
  margin-bottom: 20px;
  padding: 16px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.prompt-panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  cursor: pointer;
}

.prompt-panel-head h2 {
  font-size: 0.95rem;
  font-weight: 700;
}

.prompt-panel-head p {
  color: var(--text-secondary);
  font-size: 0.84rem;
  margin-top: 2px;
}

.selection-count-block {
  text-align: right;
  flex-shrink: 0;
}

.selection-count-label {
  display: block;
  color: var(--text-secondary);
  font-size: 0.72rem;
}

.selection-count-value {
  font-size: 1.6rem;
  font-weight: 800;
  line-height: 1;
  color: var(--accent);
}

.prompt-body {
  display: none;
  margin-top: 14px;
}

.prompt-body.open {
  display: block;
}

.prompt-output {
  width: 100%;
  min-height: 180px;
  resize: vertical;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: #f8fafc;
  color: var(--text);
  font: 0.85rem/1.55 monospace;
}

.prompt-output:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.prompt-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 10px;
}

.action-btn {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 500;
  transition: all 0.15s;
}

.action-btn:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}

.action-btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.action-btn.primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.action-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ── Results ───────────────────────────────────────────────────── */

.results-section {
  margin-bottom: 32px;
}

.results-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.results-head h2 {
  font-size: 1rem;
  font-weight: 700;
}

.filter-note {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

/* ── Skill cards ───────────────────────────────────────────────── */

.skill-card {
  display: flex;
  flex-direction: column;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  transition: all 0.15s;
  box-shadow: var(--shadow-sm);
}

.skill-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.skill-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.skill-select {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  font-size: 0.8rem;
  cursor: pointer;
}

.skill-checkbox {
  width: 15px;
  height: 15px;
  accent-color: var(--accent);
}

.skill-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 500;
}

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

.skill-card .name {
  font-weight: 700;
  font-size: 0.92rem;
  margin-bottom: 4px;
  color: var(--text);
}

.skill-card .desc {
  color: var(--text-secondary);
  font-size: 0.82rem;
  line-height: 1.45;
  flex: 1;
}

.skill-card .tags {
  margin-top: 8px;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.skill-tag {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 4px;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.skill-tag[data-tag="CC"]   { background: #dcfce7; color: var(--tag-cc); }
.skill-tag[data-tag="OC"]   { background: #ffedd5; color: var(--tag-oc); }
.skill-tag[data-tag="CX"]   { background: #ede9fe; color: var(--tag-cx); }
.skill-tag[data-tag="MCP"]  { background: #fce7f3; color: var(--tag-mcp); }
.skill-tag[data-tag="OAI"]  { background: #dbeafe; color: var(--tag-oai); }
.skill-tag[data-tag="TOOL"] { background: #f1f5f9; color: var(--tag-tool); }

/* Dimension tags */
.dim-tags {
  margin-top: 8px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.dim-group {
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.dim-group-icon {
  font-size: 0.65rem;
  line-height: 1;
}

.dim-tag {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.68rem;
  font-weight: 500;
}

.dim-target    { background: #fff7ed; color: var(--dim-target); }
.dim-technique { background: #ecfeff; color: var(--dim-technique); }
.dim-form      { background: #f5f3ff; color: var(--dim-form); }

/* ── Pagination ────────────────────────────────────────────────── */

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
}

.page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.page-btn:hover:not(:disabled):not(.active) {
  border-color: var(--accent);
  color: var(--accent);
}

.page-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 700;
}

.page-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.page-info {
  color: var(--text-secondary);
  font-size: 0.82rem;
  padding: 0 8px;
}

/* ── Legend ─────────────────────────────────────────────────────── */

.legend-section {
  margin-bottom: 32px;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.legend-section > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.legend-section > summary::-webkit-details-marker {
  display: none;
}

.legend-section > summary::after {
  content: "▸";
  color: var(--text-secondary);
  font-size: 0.8rem;
  transition: transform 0.2s;
}

.legend-section[open] > summary::after {
  transform: rotate(90deg);
}

.filter-heading {
  font-size: 0.95rem;
  font-weight: 700;
}

.tag-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 8px;
}

.tag-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.legend-note {
  color: var(--text-secondary);
  font-size: 0.82rem;
}

/* ── Utilities ─────────────────────────────────────────────────── */

.hidden { display: none !important; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.empty-state {
  text-align: center;
  color: var(--text-secondary);
  padding: 56px 0;
  font-size: 0.95rem;
}

.results-empty {
  grid-column: 1 / -1;
}

/* ── Footer ────────────────────────────────────────────────────── */

footer {
  border-top: 1px solid var(--border);
  padding: 20px 0 32px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.82rem;
}

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

footer a:hover {
  text-decoration: underline;
}

/* ── Responsive ────────────────────────────────────────────────── */

@media (max-width: 900px) {
  .results-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }

  .hero {
    padding-top: 20px;
  }

  .hero-panels,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .results-grid {
    grid-template-columns: 1fr;
  }

  .search-bar input {
    padding-right: 16px;
  }

  .search-bar #count {
    position: static;
    display: block;
    transform: none;
    margin-top: 6px;
    text-align: right;
  }

  .prompt-panel-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .selection-count-block {
    text-align: left;
  }

  .filter-popup {
    left: auto;
    right: 0;
  }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.3rem; }
  .skill-card { padding: 10px 12px; }
}