:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --accent: #4f46e5;
  --accent-soft: #eef2ff;
  --track: #e2e8f0;
  --caveat-bg: #fffbeb;
  --caveat-border: #fde68a;
  --caveat-text: #92400e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --surface: #1e293b;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #334155;
    --accent: #818cf8;
    --accent-soft: #1e1b4b;
    --track: #334155;
    --caveat-bg: #422006;
    --caveat-border: #92400e;
    --caveat-text: #fde68a;
  }
}

* {
  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;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.site-title-link {
  display: flex;
  flex-direction: column;
  color: var(--text);
  text-decoration: none;
  max-width: 560px;
}

.site-title {
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.3;
}

.site-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.9rem;
}

.site-nav a {
  color: var(--accent);
  text-decoration: none;
}

.site-nav a.button-link {
  color: #ffffff;
}

.site-main {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.25rem;
}

.site-footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 2rem 1rem;
}

.site-footer p {
  margin: 0.25rem 0;
}

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

h1 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

h2 {
  font-size: 1.15rem;
  margin-top: 2rem;
}

h3 {
  font-size: 1rem;
  margin: 0 0 0.5rem;
}

.page-intro {
  color: var(--text-muted);
}

.page-header-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.button-link {
  display: inline-block;
  background: var(--accent);
  color: #ffffff;
  border: none;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}

.button-link:hover {
  opacity: 0.9;
}

.auth-form-wrapper {
  max-width: 380px;
  margin-top: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-top: 1rem;
}

.auth-form label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.auth-form input[type="text"],
.auth-form input[type="password"] {
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
}

.auth-form .button-link {
  margin-top: 1rem;
  border: none;
}

.form-error {
  color: #dc2626;
  font-size: 0.9rem;
  background: rgba(220, 38, 38, 0.1);
  border: 1px solid rgba(220, 38, 38, 0.3);
  border-radius: 6px;
  padding: 0.6rem 0.75rem;
  margin-top: 0.75rem;
}

.value-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  margin-top: 1.25rem;
}

.value-panel h2 {
  margin-top: 0;
}

.value-list {
  margin: 0.75rem 0 0;
  padding-left: 1.25rem;
}

.value-list li {
  margin-bottom: 0.5rem;
  color: var(--text-muted);
}

.value-list li:last-child {
  margin-bottom: 0;
}

.value-list strong {
  color: var(--text);
}

.repository-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.export-all-link {
  margin-top: 1rem;
  font-size: 0.9rem;
}

.export-all-link a {
  color: var(--accent);
  text-decoration: none;
}

.repository-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s ease;
}

.repository-card:hover,
.repository-card:focus-visible {
  border-color: var(--accent);
}

.repository-card h2 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.repository-meta,
.repository-stat {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0.2rem 0;
}

.back-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
}

.repository-description {
  color: var(--text-muted);
}

.score-summary,
.nlp-section,
.timeline-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  margin-top: 1rem;
}

.score-headline {
  font-size: 2.25rem;
  font-weight: 700;
  margin: 0.25rem 0;
}

.score-out-of {
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text-muted);
}

.score-headline-empty {
  color: var(--text-muted);
  font-size: 1.5rem;
}

.score-caveat,
.nlp-caveat {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.metric-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
}

.metric-card dl {
  margin: 0;
}

.metric-card dt {
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-top: 0.6rem;
}

.metric-card dt:first-child {
  margin-top: 0;
}

.metric-card dd {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
}

.nlp-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
  margin-top: 1rem;
}

.nlp-headline {
  font-weight: 600;
  margin-top: 0;
}

.donut-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
}

.chart-donut {
  max-width: 220px;
}

.donut-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.25rem;
  margin-top: 1rem;
}

.donut-legend-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.legend-dot {
  display: inline-block;
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  margin-top: 0.3rem;
  flex-shrink: 0;
}

.legend-label {
  font-weight: 600;
  font-size: 0.9rem;
}

.legend-value {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.empty-state {
  color: var(--text-muted);
}

code {
  background: var(--track);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.9em;
}

.chart {
  width: 100%;
  height: auto;
  max-width: 480px;
  display: block;
  margin-top: 0.75rem;
}

.chart-label,
.chart-value {
  font-size: 11px;
  fill: var(--text-muted);
}

.chart-track {
  fill: var(--track);
  stroke: var(--track);
}

.chart-gridline {
  stroke: var(--border);
  stroke-width: 1;
}

.chart-axis-label {
  font-size: 10px;
  fill: var(--text-muted);
}

.chart-center-label {
  font-size: 20px;
  fill: var(--text);
  font-weight: 600;
}

.chart-center-value {
  font-size: 26px;
  fill: var(--text);
  font-weight: 700;
}

.chart-center-caption {
  font-size: 11px;
  fill: var(--text-muted);
}

.sparkline-area {
  fill: var(--accent);
  opacity: 0.15;
}

.sparkline-line {
  stroke: var(--accent);
  stroke-width: 2;
}

.metric-card-caption {
  color: var(--text-muted);
  font-size: 0.78rem;
  margin: -0.25rem 0 0.75rem;
}

.info-box {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--accent-soft);
  padding: 0.4rem 0.9rem;
}

.info-box summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.6rem 0;
  color: var(--accent);
  list-style: none;
}

.info-box summary::-webkit-details-marker {
  display: none;
}

.info-box summary::before {
  content: "+ ";
}

.info-box[open] summary::before {
  content: "\2212 ";
}

.info-box[open] {
  background: var(--surface);
}

.explainer-list {
  margin: 0 0 0.75rem;
}

.explainer-list dt {
  font-weight: 700;
  font-size: 0.85rem;
  margin-top: 0.9rem;
}

.explainer-list dt:first-child {
  margin-top: 0;
}

.explainer-list dd {
  margin: 0.2rem 0 0;
  color: var(--text-muted);
}

.explainer-list a {
  color: var(--accent);
}

.caveat-box {
  background: var(--caveat-bg);
  border: 1px solid var(--caveat-border);
  color: var(--caveat-text);
  border-radius: 8px;
  padding: 0.6rem 0.75rem;
  margin-top: 0.2rem;
}

.dimension-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.dimension-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
}

.dimension-card h3 {
  margin-top: 0;
}

.dimension-card p {
  color: var(--text-muted);
  margin: 0.35rem 0;
}

.dimension-evidence {
  font-size: 0.82rem;
  font-style: italic;
}

.score-explainer h2 {
  margin-top: 0;
}

.stats-strip {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem;
  margin-top: 1.5rem;
}

.stats-strip strong {
  color: var(--text);
}

@media (max-width: 640px) {
  .site-main {
    padding: 0.85rem;
  }

  .score-headline {
    font-size: 1.75rem;
  }

  .nlp-summary {
    flex-direction: column;
    align-items: flex-start;
  }
}