:root {
  --ard-ink: #111318;
  --ard-muted: #616875;
  --ard-line: #e7e9ee;
  --ard-soft: #f7f8fa;
  --ard-card: #ffffff;
  --ard-accent: #5b4cf0;
  --ard-accent-soft: #f1efff;
  --ard-success: #16794b;
  --ard-warning: #8a5b00;
  --ard-radius-lg: 24px;
  --ard-radius-md: 16px;
  --ard-shadow: 0 18px 55px rgba(17, 19, 24, 0.08);
}

.ard-tools-shell,
.ard-tools-shell * {
  box-sizing: border-box;
}

.ard-tools-shell {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: 18px 0 72px;
  color: var(--ard-ink);
  font-family: inherit;
}

.ard-tools-hero {
  max-width: 820px;
  padding: 28px 0 34px;
}

.ard-tools-eyebrow,
.ard-tool-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  color: var(--ard-accent);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.ard-tools-eyebrow::before,
.ard-tool-kicker::before {
  content: "";
  width: 18px;
  height: 2px;
  border-radius: 99px;
  background: currentColor;
}

.ard-tools-hero h2 {
  margin: 0;
  color: var(--ard-ink);
  font-size: clamp(34px, 5vw, 62px);
  line-height: 1.02;
  letter-spacing: -0.045em;
  font-weight: 780;
}

.ard-tools-hero p {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--ard-muted);
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.68;
}

.ard-tools-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.ard-tool-card {
  position: relative;
  min-height: 250px;
  padding: 26px;
  overflow: hidden;
  border: 1px solid var(--ard-line);
  border-radius: var(--ard-radius-lg);
  background: var(--ard-card);
  color: var(--ard-ink) !important;
  text-decoration: none !important;
  box-shadow: 0 1px 0 rgba(17, 19, 24, 0.02);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.ard-tool-card::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 210px;
  height: 210px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--ard-accent-soft) 0%, rgba(241, 239, 255, 0) 70%);
  pointer-events: none;
}

.ard-tool-card:hover {
  transform: translateY(-3px);
  border-color: #d7d4ff;
  box-shadow: var(--ard-shadow);
}

.ard-tool-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.ard-chip {
  display: inline-flex;
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--ard-soft);
  color: #4c5260;
  font-size: 12px;
  font-weight: 700;
}

.ard-arrow {
  font-size: 22px;
  line-height: 1;
  transition: transform 180ms ease;
}

.ard-tool-card:hover .ard-arrow {
  transform: translate(2px, -2px);
}

.ard-tool-card h2 {
  margin: 48px 0 10px;
  font-size: clamp(22px, 2.5vw, 30px);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.ard-tool-card p {
  max-width: 520px;
  margin: 0;
  color: var(--ard-muted);
  font-size: 15px;
  line-height: 1.65;
}

.ard-card-cta {
  display: inline-block;
  margin-top: 22px;
  color: var(--ard-accent);
  font-size: 14px;
  font-weight: 750;
}

.ard-tool-panel {
  border: 1px solid var(--ard-line);
  border-radius: var(--ard-radius-lg);
  background: var(--ard-card);
  box-shadow: var(--ard-shadow);
  overflow: hidden;
}

.ard-tool-intro {
  padding: 30px 32px 0;
}

.ard-tool-intro h2 {
  margin: 0;
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.035em;
}

.ard-tool-intro p {
  max-width: 760px;
  margin: 12px 0 0;
  color: var(--ard-muted);
  font-size: 15px;
  line-height: 1.65;
}

.ard-tool-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 0;
  padding-top: 28px;
}

.ard-form {
  padding: 30px 32px 34px;
  border-top: 1px solid var(--ard-line);
  border-right: 1px solid var(--ard-line);
  background: #fbfbfc;
}

.ard-form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 17px;
}

.ard-field {
  display: grid;
  gap: 8px;
  margin: 0;
}

.ard-field > span:first-child {
  color: #343943;
  font-size: 13px;
  font-weight: 700;
}

.ard-field select,
.ard-field input {
  width: 100%;
  min-height: 48px;
  margin: 0;
  padding: 11px 13px;
  border: 1px solid #dfe2e8;
  border-radius: 12px;
  outline: none;
  background: #fff;
  color: var(--ard-ink);
  font: inherit;
  font-size: 14px;
  line-height: 1.35;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.ard-field select:focus,
.ard-field input:focus {
  border-color: var(--ard-accent);
  box-shadow: 0 0 0 3px rgba(91, 76, 240, 0.11);
}

.ard-input-wrap {
  position: relative;
}

.ard-input-wrap input {
  padding-right: 44px;
}

.ard-input-suffix {
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  color: var(--ard-muted);
  font-size: 13px;
  font-weight: 700;
  pointer-events: none;
}

.ard-primary-btn,
.ard-secondary-btn {
  appearance: none;
  border: 0;
  border-radius: 12px;
  cursor: pointer;
  font: inherit;
  font-weight: 750;
  transition: transform 150ms ease, box-shadow 150ms ease, opacity 150ms ease;
}

.ard-primary-btn {
  width: 100%;
  min-height: 50px;
  margin-top: 22px;
  padding: 13px 18px;
  background: var(--ard-ink);
  color: #fff;
}

.ard-primary-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 28px rgba(17, 19, 24, 0.14);
}

.ard-secondary-btn {
  padding: 10px 13px;
  border: 1px solid var(--ard-line);
  background: #fff;
  color: var(--ard-ink);
  font-size: 13px;
}

.ard-secondary-btn:hover {
  border-color: #cbcfd8;
}

.ard-result {
  min-width: 0;
  padding: 30px 32px 34px;
  border-top: 1px solid var(--ard-line);
  background: #fff;
}

.ard-result-empty {
  display: grid;
  place-items: center;
  min-height: 480px;
}

.ard-empty-state {
  max-width: 420px;
  text-align: center;
}

.ard-empty-state > span {
  display: inline-flex;
  margin-bottom: 13px;
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--ard-accent-soft);
  color: var(--ard-accent);
  font-size: 12px;
  font-weight: 750;
}

.ard-empty-state h3 {
  margin: 0;
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.ard-empty-state p {
  margin: 10px 0 0;
  color: var(--ard-muted);
  font-size: 14px;
  line-height: 1.6;
}

.ard-result-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 22px;
}

.ard-result-head h3 {
  margin: 4px 0 0;
  font-size: clamp(25px, 3vw, 36px);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.ard-result-label {
  color: var(--ard-accent);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.ard-result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.ard-result-summary {
  margin: 0 0 24px;
  color: var(--ard-muted);
  font-size: 15px;
  line-height: 1.65;
}

.ard-diagram {
  display: grid;
  gap: 10px;
  margin: 20px 0 26px;
  padding: 18px;
  border: 1px solid var(--ard-line);
  border-radius: 16px;
  background: linear-gradient(180deg, #fbfbff 0%, #fff 100%);
  overflow-x: auto;
}

.ard-diagram-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-width: max-content;
}

.ard-node {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 9px 13px;
  border: 1px solid #dadde5;
  border-radius: 11px;
  background: #fff;
  color: #282d35;
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}

.ard-node-primary {
  border-color: #cec9ff;
  background: var(--ard-accent-soft);
  color: #4335d8;
}

.ard-flow-arrow {
  color: #949aa6;
  font-size: 18px;
  font-weight: 500;
}

.ard-result-section {
  margin-top: 24px;
}

.ard-result-section h4 {
  margin: 0 0 11px;
  color: var(--ard-ink);
  font-size: 15px;
  line-height: 1.3;
}

.ard-tag-list,
.ard-check-list,
.ard-stack-list,
.ard-metric-grid {
  display: grid;
  gap: 9px;
}

.ard-tag-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.ard-tag-item,
.ard-check-item,
.ard-stack-item,
.ard-metric {
  border: 1px solid var(--ard-line);
  border-radius: 12px;
  background: #fff;
}

.ard-tag-item,
.ard-check-item {
  padding: 11px 12px;
  color: #424853;
  font-size: 13px;
  line-height: 1.45;
}

.ard-check-item::before {
  content: "✓";
  margin-right: 8px;
  color: var(--ard-success);
  font-weight: 900;
}

.ard-stack-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 14px;
  padding: 13px 14px;
}

.ard-stack-item strong {
  color: #313640;
  font-size: 13px;
}

.ard-stack-item span {
  color: var(--ard-muted);
  font-size: 13px;
  line-height: 1.45;
}

.ard-metric-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.ard-metric {
  padding: 16px;
}

.ard-metric span {
  display: block;
  color: var(--ard-muted);
  font-size: 12px;
  font-weight: 650;
}

.ard-metric strong {
  display: block;
  margin-top: 5px;
  color: var(--ard-ink);
  font-size: 24px;
  line-height: 1.1;
  letter-spacing: -0.035em;
}

.ard-score {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 18px 0 24px;
  padding: 17px;
  border: 1px solid var(--ard-line);
  border-radius: 16px;
  background: var(--ard-soft);
}

.ard-score-number {
  display: grid;
  place-items: center;
  width: 68px;
  height: 68px;
  flex: 0 0 68px;
  border-radius: 50%;
  background: var(--ard-ink);
  color: #fff;
  font-size: 20px;
  font-weight: 800;
}

.ard-score h4 {
  margin: 0 0 4px;
  font-size: 16px;
}

.ard-score p {
  margin: 0;
  color: var(--ard-muted);
  font-size: 13px;
  line-height: 1.5;
}

.ard-note {
  margin-top: 18px;
  padding: 12px 14px;
  border-left: 3px solid var(--ard-accent);
  border-radius: 0 10px 10px 0;
  background: #faf9ff;
  color: #5b6070;
  font-size: 12px;
  line-height: 1.55;
}

@media (max-width: 920px) {
  .ard-tool-layout {
    grid-template-columns: 1fr;
  }

  .ard-form {
    border-right: 0;
  }

  .ard-result-empty {
    min-height: 320px;
  }
}

@media (max-width: 720px) {
  .ard-tools-shell {
    width: min(100% - 24px, 1180px);
    padding-bottom: 50px;
  }

  .ard-tools-hero {
    padding: 18px 0 25px;
  }

  .ard-tools-grid {
    grid-template-columns: 1fr;
  }

  .ard-tool-card {
    min-height: 220px;
    padding: 22px;
  }

  .ard-tool-card h2 {
    margin-top: 38px;
  }

  .ard-tool-intro,
  .ard-form,
  .ard-result {
    padding-left: 20px;
    padding-right: 20px;
  }

  .ard-result-head {
    display: block;
  }

  .ard-result-actions {
    justify-content: flex-start;
    margin-top: 14px;
  }

  .ard-tag-list,
  .ard-metric-grid {
    grid-template-columns: 1fr;
  }

  .ard-stack-item {
    grid-template-columns: 1fr;
    gap: 5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ard-tool-card,
  .ard-arrow,
  .ard-primary-btn,
  .ard-field select,
  .ard-field input {
    transition: none;
  }
}

/* V2 Toolkit additions */
.ard-tool-card h3 {
  margin: 42px 0 10px;
  font-size: clamp(21px, 2.2vw, 28px);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.ard-hub-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 0 0 36px;
}

.ard-hub-stats > div {
  padding: 18px 20px;
  border: 1px solid var(--ard-line);
  border-radius: 16px;
  background: #fff;
}

.ard-hub-stats strong,
.ard-hub-stats span {
  display: block;
}

.ard-hub-stats strong {
  font-size: 27px;
  letter-spacing: -0.04em;
}

.ard-hub-stats span {
  margin-top: 4px;
  color: var(--ard-muted);
  font-size: 12px;
}

.ard-tool-group {
  margin-top: 38px;
}

.ard-tool-group:first-of-type {
  margin-top: 0;
}

.ard-tool-group-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 15px;
}

.ard-tool-group-head h2 {
  margin: 0;
  font-size: 21px;
  letter-spacing: -0.025em;
}

.ard-field textarea {
  width: 100%;
  min-height: 150px;
  margin: 0;
  padding: 13px 14px;
  resize: vertical;
  border: 1px solid #dfe2e8;
  border-radius: 12px;
  outline: none;
  background: #fff;
  color: var(--ard-ink);
  font: inherit;
  font-size: 14px;
  line-height: 1.55;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.ard-field textarea:focus {
  border-color: var(--ard-accent);
  box-shadow: 0 0 0 3px rgba(91, 76, 240, 0.11);
}

.ard-field-wide {
  grid-column: 1 / -1;
}

.ard-code {
  max-height: 430px;
  margin: 14px 0 0;
  padding: 16px;
  overflow: auto;
  border: 1px solid var(--ard-line);
  border-radius: 14px;
  background: #111318;
  color: #f3f4f7;
  font-size: 12px;
  line-height: 1.6;
  white-space: pre;
}

.ard-compat-table,
.ard-permission-table {
  overflow: hidden;
  border: 1px solid var(--ard-line);
  border-radius: 14px;
}

.ard-compat-row {
  display: grid;
  grid-template-columns: 1fr 0.8fr 2fr;
  gap: 12px;
  padding: 12px 14px;
  border-top: 1px solid var(--ard-line);
  align-items: start;
  font-size: 13px;
  line-height: 1.45;
}

.ard-compat-row:first-child { border-top: 0; }
.ard-compat-head { background: var(--ard-soft); }
.ard-compat-row span { color: var(--ard-muted); }

.ard-chunk-list {
  display: grid;
  gap: 12px;
  max-height: 660px;
  margin-top: 18px;
  overflow: auto;
  padding-right: 4px;
}

.ard-chunk-card {
  padding: 15px;
  border: 1px solid var(--ard-line);
  border-radius: 14px;
  background: #fff;
}

.ard-chunk-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 9px;
}

.ard-chunk-head span {
  color: var(--ard-muted);
  font-size: 11px;
}

.ard-chunk-card p {
  margin: 0;
  color: #4d5360;
  font-size: 13px;
  line-height: 1.55;
}

.ard-budget-list {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.ard-budget-row > div:first-child {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
  color: #404650;
  font-size: 12px;
}

.ard-budget-track {
  height: 10px;
  overflow: hidden;
  border-radius: 99px;
  background: #edf0f4;
}

.ard-budget-track span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--ard-accent);
}

.ard-diff-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.ard-diff-columns h4 {
  margin: 0 0 9px;
  font-size: 14px;
}

.ard-transition-list {
  display: grid;
  gap: 9px;
}

.ard-transition {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 10px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--ard-line);
  border-radius: 12px;
  background: #fff;
  font-size: 13px;
}

.ard-transition span:last-child { text-align: right; }
.ard-transition b { color: var(--ard-accent); }

.ard-permission-builder {
  display: grid;
  gap: 10px;
}

.ard-permission-row {
  display: grid;
  grid-template-columns: minmax(140px, 1.4fr) repeat(5, auto) auto;
  gap: 10px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--ard-line);
  border-radius: 12px;
  background: #fff;
}

.ard-permission-row > input[type="text"] {
  min-width: 0;
  min-height: 40px;
  padding: 9px 10px;
  border: 1px solid #dfe2e8;
  border-radius: 9px;
  font: inherit;
}

.ard-permission-row label {
  display: inline-flex;
  gap: 5px;
  align-items: center;
  color: #4b5260;
  font-size: 11px;
  white-space: nowrap;
}

.ard-row-remove {
  width: 30px;
  height: 30px;
  border: 1px solid var(--ard-line);
  border-radius: 8px;
  background: #fff;
  color: #7b818e;
  cursor: pointer;
}

.ard-inline-actions {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}

.ard-inline-actions .ard-primary-btn {
  width: auto;
  margin-top: 0;
}

.ard-permission-table-row {
  display: grid;
  grid-template-columns: 2fr repeat(5, 0.6fr) 0.9fr;
  gap: 8px;
  align-items: center;
  padding: 11px 12px;
  border-top: 1px solid var(--ard-line);
  font-size: 12px;
  text-align: center;
}

.ard-permission-table-row:first-child { border-top: 0; }
.ard-permission-table-row > :first-child { text-align: left; }
.ard-permission-table-head { background: var(--ard-soft); }

.ard-check-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.ard-check-option {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  padding: 12px;
  border: 1px solid var(--ard-line);
  border-radius: 12px;
  background: #fff;
  color: #414752;
  font-size: 13px;
  line-height: 1.45;
}

.ard-check-option input {
  width: auto;
  min-height: 0;
  margin: 2px 0 0;
}

@media (max-width: 920px) {
  .ard-permission-row {
    grid-template-columns: 1fr repeat(3, auto);
  }

  .ard-permission-row label:nth-of-type(4),
  .ard-permission-row label:nth-of-type(5) {
    grid-row: 2;
  }
}

@media (max-width: 720px) {
  .ard-hub-stats,
  .ard-diff-columns,
  .ard-check-grid {
    grid-template-columns: 1fr;
  }

  .ard-tool-group-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .ard-tool-card h3 {
    margin-top: 34px;
  }

  .ard-compat-row,
  .ard-permission-table-row {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .ard-compat-head,
  .ard-permission-table-head {
    display: none;
  }

  .ard-permission-row {
    grid-template-columns: 1fr 1fr;
  }

  .ard-permission-row > input[type="text"] {
    grid-column: 1 / -1;
  }

  .ard-inline-actions {
    flex-direction: column;
  }

  .ard-inline-actions .ard-primary-btn {
    width: 100%;
  }

  .ard-chunk-head {
    align-items: flex-start;
    flex-direction: column;
  }
}

/* ============================================================
   V4 — Marketplace, discoverability, related content, UX polish
   ============================================================ */

.ard-section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.ard-section-heading h2,
.ard-followup-head h2 {
  margin: 2px 0 0;
  color: var(--ard-ink);
  font-size: clamp(25px, 3vw, 38px);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.ard-section-heading p {
  max-width: 680px;
  margin: 9px 0 0;
  color: var(--ard-muted);
  font-size: 15px;
  line-height: 1.65;
}

.ard-featured-section {
  margin-top: 42px;
}

.ard-featured-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.ard-featured-grid .ard-tool-card {
  min-height: 285px;
}

.ard-card-badges {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 18px;
}

.ard-badge {
  display: inline-flex;
  align-items: center;
  min-height: 25px;
  padding: 4px 8px;
  border: 1px solid #e1e3e8;
  border-radius: 999px;
  background: #fff;
  color: #585f6c;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.ard-badge-featured {
  border-color: #d9d5ff;
  background: var(--ard-accent-soft);
  color: var(--ard-accent);
}

.ard-marketplace {
  margin-top: 68px;
}

.ard-tool-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  padding: 14px;
  border: 1px solid var(--ard-line);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 8px 28px rgba(17, 19, 24, 0.045);
}

.ard-tool-search {
  position: relative;
  flex: 1 1 330px;
  min-width: min(100%, 290px);
}

.ard-tool-search input {
  width: 100%;
  min-height: 44px;
  padding: 10px 42px 10px 14px;
  border: 1px solid #dfe2e8;
  border-radius: 12px;
  outline: 0;
  background: #fbfbfc;
  color: var(--ard-ink);
  font: inherit;
  font-size: 14px;
  transition: border-color 150ms ease, box-shadow 150ms ease, background 150ms ease;
}

.ard-tool-search input:focus {
  border-color: #bbb5ff;
  background: #fff;
  box-shadow: 0 0 0 4px rgba(91, 76, 240, 0.09);
}

.ard-tool-search > span:last-child {
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  color: #7a808b;
  font-size: 20px;
  pointer-events: none;
}

.ard-filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 40px;
  padding: 8px 11px;
  border: 1px solid var(--ard-line);
  border-radius: 999px;
  background: #fff;
  color: #4c5260;
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  font-weight: 750;
  transition: border-color 150ms ease, background 150ms ease, color 150ms ease, transform 150ms ease;
}

.ard-filter-chip span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 23px;
  height: 23px;
  padding: 0 6px;
  border-radius: 999px;
  background: var(--ard-soft);
  color: #777d88;
  font-size: 10px;
}

.ard-filter-chip:hover {
  transform: translateY(-1px);
  border-color: #cec9ff;
}

.ard-filter-chip.is-active {
  border-color: var(--ard-accent);
  background: var(--ard-accent);
  color: #fff;
}

.ard-filter-chip.is-active span {
  background: rgba(255,255,255,0.16);
  color: #fff;
}

.ard-marketplace-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 38px;
  margin: 10px 2px 13px;
  color: var(--ard-muted);
  font-size: 12px;
  font-weight: 650;
}

.ard-clear-search {
  padding: 5px 0;
  border: 0;
  background: transparent;
  color: var(--ard-accent);
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  font-weight: 750;
}

.ard-tools-grid-marketplace {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.ard-tools-grid-marketplace .ard-tool-card {
  min-height: 270px;
}

.ard-tool-card[hidden] {
  display: none !important;
}

.ard-no-results {
  padding: 54px 24px;
  border: 1px dashed #d9dce3;
  border-radius: 20px;
  background: #fbfbfc;
  text-align: center;
}

.ard-no-results > span {
  color: var(--ard-accent);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.ard-no-results h3 {
  margin: 8px 0 7px;
  font-size: 23px;
}

.ard-no-results p {
  margin: 0 0 18px;
  color: var(--ard-muted);
}

.ard-tool-followup {
  margin-top: 58px;
  padding-top: 36px;
  border-top: 1px solid var(--ard-line);
}

.ard-followup-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 19px;
}

.ard-text-link {
  color: var(--ard-accent) !important;
  text-decoration: none !important;
  font-size: 13px;
  font-weight: 760;
  white-space: nowrap;
}

.ard-learn-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 17px;
  padding: 18px 20px;
  border: 1px solid #dedaff;
  border-radius: 16px;
  background: linear-gradient(120deg, #f8f7ff 0%, #fff 70%);
}

.ard-learn-strip > div:first-child {
  display: grid;
  gap: 3px;
}

.ard-learn-strip strong {
  color: #2f285f;
  font-size: 14px;
}

.ard-learn-strip span {
  color: #6d6a7c;
  font-size: 12px;
}

.ard-learn-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.ard-learn-links a {
  display: inline-flex;
  padding: 8px 10px;
  border: 1px solid #d9d5ff;
  border-radius: 10px;
  background: #fff;
  color: var(--ard-accent) !important;
  text-decoration: none !important;
  font-size: 12px;
  font-weight: 750;
}

.ard-related-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.ard-tool-card-compact {
  min-height: 205px;
  padding: 20px;
}

.ard-tool-card-compact h3 {
  margin: 27px 0 8px;
  font-size: 19px;
  line-height: 1.18;
}

.ard-tool-card-compact p {
  font-size: 13px;
  line-height: 1.55;
}

.ard-tool-card-compact .ard-card-cta {
  margin-top: 16px;
}

.ard-result-utility-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding-top: 14px;
  margin-top: 22px;
  border-top: 1px solid var(--ard-line);
}

.ard-result-utility-bar button {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 7px 10px;
  border: 1px solid #dfe1e7;
  border-radius: 9px;
  background: #fff;
  color: #4b5260;
  cursor: pointer;
  font: inherit;
  font-size: 11px;
  font-weight: 760;
}

.ard-result-utility-bar button:hover {
  border-color: #cfcaff;
  color: var(--ard-accent);
}

.ard-tool-panel.is-running .ard-primary-btn {
  opacity: .72;
  cursor: wait;
}

.ard-tool-panel.is-running .ard-result {
  position: relative;
}

.ard-tool-panel.is-running .ard-result::after {
  content: "Calculating…";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(255,255,255,.82);
  color: var(--ard-muted);
  font-size: 12px;
  font-weight: 750;
  backdrop-filter: blur(2px);
}

.ard-error-state {
  padding: 22px;
  border: 1px solid #f1caca;
  border-radius: 14px;
  background: #fff7f7;
}

.ard-error-state span {
  color: #a12828;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.ard-error-state h3 {
  margin: 7px 0 6px;
  color: #741d1d;
  font-size: 20px;
}

.ard-error-state p {
  margin: 0;
  color: #875252;
  font-size: 13px;
  line-height: 1.55;
}

@media (max-width: 1080px) {
  .ard-featured-grid,
  .ard-tools-grid-marketplace {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ard-related-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .ard-featured-section,
  .ard-marketplace {
    margin-top: 42px;
  }

  .ard-featured-grid,
  .ard-tools-grid-marketplace,
  .ard-related-grid {
    grid-template-columns: 1fr;
  }

  .ard-tool-controls {
    align-items: stretch;
    padding: 11px;
  }

  .ard-tool-search {
    flex-basis: 100%;
    min-width: 100%;
  }

  .ard-filter-chip {
    flex: 1 0 auto;
    justify-content: center;
  }

  .ard-followup-head,
  .ard-learn-strip {
    align-items: flex-start;
    flex-direction: column;
  }

  .ard-learn-links {
    justify-content: flex-start;
  }

  .ard-text-link {
    white-space: normal;
  }

  .ard-tool-card-compact {
    min-height: 190px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ard-tool-card,
  .ard-arrow,
  .ard-filter-chip,
  .ard-tool-search input {
    transition: none !important;
  }
}

/* V4 finishing overrides */
.ard-hub-stats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.ard-card-badges + h3 { margin-top: 18px; }
.ard-tool-card-compact .ard-card-badges + h3 { margin-top: 14px; }

@media (max-width: 900px) {
  .ard-hub-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 520px) {
  .ard-hub-stats { grid-template-columns: 1fr; }
}


/* V5 — Debugging, RAG benchmarking, memory and tool-quality visuals */
.ard-timeline{display:grid;gap:10px;margin-top:18px}.ard-timeline-item{display:grid;grid-template-columns:36px minmax(0,1fr);gap:12px;align-items:start}.ard-timeline-index{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:800;background:#f3f4f7;border:1px solid #e0e2e8}.ard-timeline-body{border:1px solid #e2e4ea;border-radius:14px;padding:12px 14px;background:#fff}.ard-timeline-item.is-failure .ard-timeline-body{border-color:#efb7b7;background:#fffafa}.ard-timeline-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.ard-timeline-top strong{font-size:14px}.ard-timeline-top span{font-size:12px;color:#69707d}.ard-timeline-body p{margin:8px 0 0;color:#555d69;font-size:13px;line-height:1.55}
.ard-inspector-list{display:grid;gap:9px;margin-top:18px}.ard-inspector-card{display:flex;align-items:center;justify-content:space-between;gap:14px;border:1px solid #e2e4ea;border-radius:13px;padding:11px 13px;background:#fff}.ard-inspector-card>div{display:flex;align-items:center;gap:10px;min-width:0}.ard-inspector-card>div>span{font-size:12px;color:#707785}.ard-inspector-card strong{font-size:14px;overflow-wrap:anywhere}.ard-inspector-card small{font-size:11px;color:#737b88}.ard-grade{font-size:11px;font-weight:800;border-radius:999px;padding:5px 8px;white-space:nowrap}.ard-grade-2{background:#edf9f0;color:#17662c}.ard-grade-1{background:#fff8df;color:#765b00}.ard-grade-0{background:#f7eeee;color:#8b3030}
.ard-tree{display:grid;gap:12px;margin-top:18px}.ard-tree-parent{border:1px solid #dfe2e9;border-radius:15px;padding:14px;background:#fbfbfd}.ard-tree-parent>strong{display:inline-block;margin-right:8px}.ard-tree-parent>span{font-size:12px;color:#727987}.ard-tree-children{display:flex;flex-wrap:wrap;gap:7px;margin-top:11px;padding-left:16px}.ard-tree-children span{border:1px solid #d9dce4;background:#fff;border-radius:9px;padding:6px 9px;font-size:12px;color:#4b5360}
@media (max-width:640px){.ard-timeline-top{display:grid;gap:4px}.ard-inspector-card{align-items:flex-start}.ard-inspector-card>div{display:grid;gap:3px}}