:root {
  --bg: #0f1117;
  --surface: #171a23;
  --surface-hover: #1e2230;
  --border: #2a2e3d;
  --text: #e7e9ee;
  --text-dim: #9aa0b4;
  --accent: #6c8cff;
  --danger: #ff6b6b;
  --safe: #4cd48a;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

header {
  padding: 2.5rem 1.5rem 1.5rem;
  text-align: center;
}

header h1 {
  margin: 0 0 0.4rem;
  font-size: 1.9rem;
}

header p {
  margin: 0;
  color: var(--text-dim);
}

nav.breadcrumb {
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem 1.5rem 0;
}

nav.breadcrumb a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.9rem;
}

nav.breadcrumb a:hover {
  color: var(--accent);
}

main {
  max-width: 860px;
  margin: 0 auto;
  padding: 1rem 1.5rem 3rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.feature-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-decoration: none;
  color: var(--text);
  transition: background 0.15s ease, transform 0.15s ease;
}

.feature-card:hover {
  background: var(--surface-hover);
  transform: translateY(-2px);
}

.feature-card h2 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
}

.feature-card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

textarea {
  width: 100%;
  min-height: 120px;
  resize: vertical;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  font-family: inherit;
  font-size: 0.95rem;
}

select {
  display: block;
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.6rem 0.75rem;
  font-family: inherit;
  font-size: 0.95rem;
  margin-top: 0.5rem;
}

button {
  margin-top: 0.85rem;
  background: var(--accent);
  color: #0f1117;
  border: none;
  border-radius: var(--radius);
  padding: 0.6rem 1.2rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}

button:hover {
  filter: brightness(1.08);
}

button:disabled {
  opacity: 0.6;
  cursor: default;
}

.results {
  margin-top: 1.5rem;
}

.badge {
  display: inline-block;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.85rem;
}

.badge.flagged {
  background: rgba(255, 107, 107, 0.15);
  color: var(--danger);
}

.badge.clear {
  background: rgba(76, 212, 138, 0.15);
  color: var(--safe);
}

.result-badge {
  display: block;
  width: fit-content;
  margin-top: 0.75rem;
}

.category-row {
  display: grid;
  grid-template-columns: 140px 1fr 56px;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.6rem;
  font-size: 0.85rem;
}

.category-row .name {
  color: var(--text-dim);
  text-transform: capitalize;
}

.bar-track {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  height: 8px;
  overflow: hidden;
}

.bar-fill {
  display: block;
  height: 100%;
  background: var(--accent);
}

.category-row.is-flagged .bar-fill {
  background: var(--danger);
}

.category-row.is-flagged .name {
  color: var(--text);
}

.score {
  text-align: right;
  color: var(--text-dim);
}

.error {
  color: var(--danger);
  margin-top: 1rem;
  font-size: 0.9rem;
}

.hint {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

.button-secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border);
}

.button-secondary:hover {
  background: var(--surface-hover);
  filter: none;
}

.variant-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.variant-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}

.variant-label {
  color: var(--text-dim);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.35rem;
}

.variant-prompt {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9rem;
  color: var(--text);
  margin-bottom: 0.75rem;
}

.variant-output {
  white-space: pre-wrap;
  font-size: 0.9rem;
  color: var(--text);
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
}

.variant-output.placeholder {
  color: var(--text-dim);
  font-style: italic;
}

.thinking {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.spinner {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.explanation-panel {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.92rem;
}

.explanation-panel a {
  color: var(--accent);
}

.catalog-category + .catalog-category {
  margin-top: 1rem;
}

.catalog-category h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

.flow-diagram {
  width: 100%;
  height: auto;
  margin: 0.75rem 0 1.25rem;
}

.flow-box {
  fill: var(--bg);
  stroke: var(--border);
  stroke-width: 1;
}

.flow-box-accent {
  fill: rgba(108, 140, 255, 0.12);
  stroke: var(--accent);
}

.flow-text {
  fill: var(--text);
  font-size: 13px;
  text-anchor: middle;
  font-family: inherit;
}

.flow-line {
  stroke: var(--text-dim);
  stroke-width: 1.5;
  fill: none;
}

.flow-arrowhead {
  fill: var(--text-dim);
}