:root {
  --bg: #0b0c0f;
  --bg-elevated: #151821;
  --border-subtle: #2b2f3b;
  --accent: #f4a7b9;
  --accent-soft: rgba(244, 167, 185, 0.18);
  --text-main: #f8f9fb;
  --text-muted: #a5adbf;
  --danger: #ff6b81;
  --danger-soft: rgba(255, 107, 129, 0.14);
  --warning: #facc6b;
  --warning-soft: rgba(250, 204, 107, 0.14);
  --success: #32d296;
  --success-soft: rgba(50, 210, 150, 0.14);
  --radius-lg: 18px;
  --radius-md: 10px;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.55);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: var(--font-sans);
  background: radial-gradient(circle at top, #171b26 0, #05060a 45%, #05060a 100%);
  color: var(--text-main);
}

/* Layout */

.page-header {
  padding: 32px 24px 12px;
}

.page-header-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.page-header h1 {
  margin: 0 0 8px;
  font-size: 28px;
  letter-spacing: 0.02em;
}

.tagline {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

.main {
  max-width: 1100px;
  margin: 0 auto 32px;
  padding: 0 24px 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.55fr);
  gap: 20px;
}

.page-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 12px 24px 22px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

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

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

/* Panels */

.panel {
  background: linear-gradient(135deg, rgba(20, 24, 35, 0.98), rgba(8, 10, 16, 0.98));
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-soft);
  padding: 18px 18px 16px;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.panel-header h2 {
  margin: 0;
  font-size: 18px;
}

/* Controls panel */

.field {
  margin-bottom: 12px;
}

.field label {
  display: block;
  font-size: 13px;
  margin-bottom: 4px;
  color: var(--text-main);
}

.select {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: #05060b;
  color: var(--text-main);
  font-size: 13px;
  padding: 8px 10px;
  outline: none;
}

.select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-soft);
}

.concept-description {
  margin: 0 0 10px;
  font-size: 13px;
  color: var(--text-muted);
}

/* Summary badge */

.summary {
  margin-bottom: 14px;
}

.summary-badge {
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.summary-badge-idle {
  background: rgba(26, 30, 42, 0.9);
  color: var(--text-muted);
}

.summary-badge-low {
  background: var(--success-soft);
  color: var(--success);
}

.summary-badge-medium {
  background: var(--warning-soft);
  color: var(--warning);
}

.summary-badge-high {
  background: var(--danger-soft);
  color: var(--danger);
}

.summary-badge .count {
  font-weight: 600;
}

/* Legend */

.legend {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: rgba(7, 9, 15, 0.96);
  padding: 10px 11px;
  margin-bottom: 10px;
}

.legend h3 {
  margin: 0 0 6px;
  font-size: 13px;
}

.legend ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.legend li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.legend-dot {
  width: 11px;
  height: 11px;
  border-radius: 999px;
  display: inline-block;
}

.legend-low {
  background: var(--success-soft);
  border: 1px solid var(--success);
}

.legend-medium {
  background: var(--warning-soft);
  border: 1px solid var(--warning);
}

.legend-high {
  background: var(--danger-soft);
  border: 1px solid var(--danger);
}

/* Notes card */

.notes-card {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: rgba(7, 9, 15, 0.96);
  padding: 10px 11px;
  font-size: 12px;
  color: var(--text-muted);
}

.notes-card h3 {
  margin: 0 0 4px;
  font-size: 13px;
  color: var(--text-main);
}

.notes-card p {
  margin: 0 0 6px;
}

/* Diff card */

.diff-card {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: rgba(7, 9, 15, 0.96);
  padding: 10px 11px 12px;
  font-size: 12px;
  margin-bottom: 10px;
}

.diff-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.diff-title {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
}

.diff-meta {
  margin: 0;
  font-size: 11px;
  color: var(--text-muted);
}

.diff-versions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
}

.diff-column {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: #05060b;
  padding: 8px 9px 7px;
}

.diff-column-title {
  margin: 0 0 4px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.diff-field-group {
  margin-bottom: 6px;
}

.diff-field-group:last-child {
  margin-bottom: 0;
}

.diff-field-group-label {
  font-size: 11px;
  font-weight: 500;
  margin-bottom: 2px;
  color: var(--text-main);
}

.diff-field-list {
  margin: 0;
  padding-left: 16px;
  color: var(--text-muted);
  font-size: 12px;
}

.diff-field {
  font-family: var(--font-mono);
  font-size: 11px;
}

.diff-field-breaking {
  color: var(--danger);
}

.diff-field-nonbreaking {
  color: var(--success);
}

/* Dependency map */

.dependency-map-container {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: rgba(7, 9, 15, 0.96);
  padding: 10px 11px 12px;
  min-height: 210px;
  font-size: 12px;
}

.map-empty {
  margin: 0;
  color: var(--text-muted);
}

.dependency-map-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.dependency-map-title {
  margin: 0;
  font-size: 13px;
  font-weight: 500;
}

.dependency-map-note {
  margin: 0;
  font-size: 11px;
  color: var(--text-muted);
}

.dependency-paths {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.dependency-path {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

/* Service nodes */

.service-node {
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: #05060b;
  padding: 6px 10px;
  font-size: 11px;
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  cursor: pointer;
  min-width: 120px;
  transition: transform 0.07s ease, box-shadow 0.07s ease, border-color 0.07s ease,
    background 0.07s ease;
}

.service-node:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.5);
}

.service-node-selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-soft), 0 8px 22px rgba(0, 0, 0, 0.6);
}

.service-node-low {
  background: var(--success-soft);
  border-color: var(--success);
}

.service-node-medium {
  background: var(--warning-soft);
  border-color: var(--warning);
}

.service-node-high {
  background: var(--danger-soft);
  border-color: var(--danger);
}

.service-node-name {
  font-weight: 600;
}

.service-node-role {
  color: var(--text-muted);
  font-size: 10px;
}

.service-node-impact-pill {
  align-self: flex-start;
  border-radius: 999px;
  padding: 2px 7px;
  font-size: 9px;
  font-weight: 500;
  margin-top: 1px;
}

.service-node-impact-low {
  background: rgba(50, 210, 150, 0.12);
  color: var(--success);
}

.service-node-impact-medium {
  background: rgba(250, 204, 107, 0.12);
  color: var(--warning);
}

.service-node-impact-high {
  background: rgba(255, 107, 129, 0.12);
  color: var(--danger);
}

/* Connector arrows */

.connector-arrow {
  font-size: 13px;
  color: var(--text-muted);
  opacity: 0.9;
}

/* Details card */

.details-card {
  margin-top: 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: rgba(7, 9, 15, 0.96);
  padding: 11px 12px 10px;
  font-size: 12px;
}

.details-card h3 {
  margin: 0 0 6px;
  font-size: 13px;
}

.details-empty {
  margin: 0;
  color: var(--text-muted);
}

.details-meta {
  margin: 0 0 6px;
  font-size: 11px;
  color: var(--text-muted);
}

.details-section {
  margin-bottom: 6px;
}

.details-section h4 {
  margin: 0 0 2px;
  font-size: 12px;
  color: var(--text-main);
}

.details-section p,
.details-section ul {
  margin: 0;
  color: var(--text-muted);
}

.details-section ul {
  padding-left: 16px;
}

/* Responsive */

@media (max-width: 900px) {
  .main {
    grid-template-columns: minmax(0, 1fr);
  }

  .panel {
    padding: 16px 14px 14px;
  }
}

@media (max-width: 640px) {
  .diff-versions {
    grid-template-columns: minmax(0, 1fr);
  }
}