:root {
  color-scheme: light;
  --bg: #f3f7fb;
  --panel: rgba(255, 255, 255, 0.9);
  --panel-strong: #ffffff;
  --panel-muted: #e8eef6;
  --text: #102033;
  --text-soft: #4d6177;
  --border: rgba(16, 32, 51, 0.12);
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --success: #0f766e;
  --shadow: 0 18px 48px rgba(15, 23, 42, 0.12);
  --graph-bg: radial-gradient(circle at top, rgba(37, 99, 235, 0.12), transparent 40%), linear-gradient(180deg, #ffffff 0%, #eef4fb 100%);
  --chip-bg: #e7eef9;
  --chip-active: #dbeafe;
  --link: rgba(77, 97, 119, 0.38);
  --domain: #f59e0b;
  --concept: #2563eb;
  --service: #0f766e;
  --selected: #dc2626;
  --match: #7c3aed;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #08111f;
  --panel: rgba(10, 19, 35, 0.9);
  --panel-strong: #0f1b2d;
  --panel-muted: #16253a;
  --text: #e7eef9;
  --text-soft: #b3c2d4;
  --border: rgba(179, 194, 212, 0.16);
  --accent: #60a5fa;
  --accent-strong: #93c5fd;
  --success: #34d399;
  --shadow: 0 24px 60px rgba(2, 6, 23, 0.45);
  --graph-bg: radial-gradient(circle at top, rgba(96, 165, 250, 0.16), transparent 40%), linear-gradient(180deg, #0f1b2d 0%, #08111f 100%);
  --chip-bg: #17263b;
  --chip-active: rgba(37, 99, 235, 0.2);
  --link: rgba(179, 194, 212, 0.35);
  --domain: #fbbf24;
  --concept: #60a5fa;
  --service: #34d399;
  --selected: #f87171;
  --match: #c084fc;
}

* {
  box-sizing: border-box;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: Inter, Segoe UI, Arial, sans-serif;
}

button,
input {
  font: inherit;
}

button {
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel-strong);
  color: var(--text);
  cursor: pointer;
  transition: transform 120ms ease, border-color 120ms ease, background 120ms ease;
}

button:hover,
button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18);
}

button:hover {
  transform: translateY(-1px);
}

input {
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel-strong);
  color: var(--text);
  padding: 0 1rem;
}

a {
  color: var(--accent-strong);
}

.app-shell {
  display: grid;
  gap: 1rem;
  min-height: 100vh;
  padding: 1rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: start;
  padding: 1.25rem;
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: var(--accent-strong);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.topbar h1 {
  margin: 0;
  font-size: clamp(1.9rem, 3vw, 3rem);
}

.subtitle {
  max-width: 58rem;
  margin: 0.6rem 0 0;
  color: var(--text-soft);
  line-height: 1.6;
}

.topbar-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: center;
  padding: 1rem 1.25rem;
}

.search-control {
  display: grid;
  gap: 0.35rem;
  min-width: min(100%, 20rem);
  flex: 1 1 16rem;
}

.search-control span,
.filter-group span,
.action-group span,
.legend-heading,
.sidebar-eyebrow,
.source-strip span {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-soft);
}

.filter-group,
.action-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.chip-row,
.action-row,
.legend,
.source-strip,
.badge-row,
.domain-list,
.connected-list,
.sources-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip,
.action-row button,
.theme-toggle {
  padding: 0.65rem 1rem;
}

.chip {
  background: var(--chip-bg);
}

.chip.is-active,
.action-row button.is-active,
.theme-toggle.is-active {
  background: var(--chip-active);
  border-color: rgba(37, 99, 235, 0.4);
  color: var(--accent-strong);
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 2.3fr) minmax(18rem, 1fr);
  gap: 1rem;
  min-height: 0;
}

.graph-panel,
.sidebar {
  min-height: 0;
}

.graph-panel {
  display: grid;
  grid-template-rows: auto minmax(24rem, 1fr) auto;
  overflow: hidden;
}

.graph-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: start;
  padding: 1rem 1.25rem 0;
}

.legend-block {
  display: grid;
  gap: 0.45rem;
}

.legend-item {
  display: inline-flex;
  gap: 0.5rem;
  align-items: center;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: var(--panel-muted);
}

.legend-swatch {
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 999px;
}

.legend-swatch.domain {
  background: var(--domain);
}

.legend-swatch.concept {
  background: var(--concept);
}

.legend-swatch.service {
  background: var(--service);
}

.status-text {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.5;
  text-align: right;
}

.graph-canvas {
  position: relative;
  min-height: 60vh;
  padding: 0.5rem;
}

#graph-svg {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 1rem;
  background: var(--graph-bg);
  touch-action: none;
}

.source-strip {
  padding: 0 1.25rem 1rem;
  color: var(--text-soft);
  line-height: 1.5;
}

.source-note {
  margin: 0;
}

.sidebar {
  padding: 1.25rem;
  overflow: auto;
}

.sidebar h2 {
  margin: 0;
  font-size: 1.55rem;
}

.sidebar p,
.sidebar li {
  color: var(--text-soft);
  line-height: 1.65;
}

.sidebar-section + .sidebar-section {
  margin-top: 1.2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border);
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: var(--panel-muted);
  color: var(--text);
}

.badge-domain {
  background: rgba(245, 158, 11, 0.16);
}

.badge-concept {
  background: rgba(37, 99, 235, 0.16);
}

.badge-service {
  background: rgba(15, 118, 110, 0.16);
}

.connected-button {
  min-height: 36px;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
}

.footer {
  padding: 0.25rem 0 1rem;
  text-align: center;
  color: var(--text-soft);
}

.link {
  stroke: var(--link);
  stroke-width: 1.6;
}

.link.is-hidden {
  opacity: 0.08;
}

.link.is-highlight {
  stroke: var(--selected);
  stroke-width: 2.8;
  opacity: 0.95;
}

.node-hit {
  fill: transparent;
}

.node-core {
  stroke: rgba(255, 255, 255, 0.9);
  stroke-width: 2;
}

.node--domain .node-core {
  fill: var(--domain);
}

.node--concept .node-core {
  fill: var(--concept);
}

.node--service .node-core {
  fill: var(--service);
}

.node.is-hidden,
.label.is-hidden {
  opacity: 0.18;
}

.node.is-hidden {
  pointer-events: none;
}

.node.is-match .node-core,
.label.is-match {
  filter: drop-shadow(0 0 10px rgba(124, 58, 237, 0.4));
}

.node.is-match .node-core {
  stroke: var(--match);
  stroke-width: 4;
}

.node.is-selected .node-core {
  stroke: var(--selected);
  stroke-width: 4.5;
}

.node.is-pinned .node-core {
  stroke-dasharray: 4 3;
}

.label {
  fill: var(--text);
  font-size: 0.86rem;
  font-weight: 600;
  paint-order: stroke;
  stroke: rgba(255, 255, 255, 0.95);
  stroke-width: 4px;
  stroke-linecap: round;
  stroke-linejoin: round;
  pointer-events: none;
}

:root[data-theme="dark"] .label {
  stroke: rgba(8, 17, 31, 0.95);
}

.domain-title {
  color: var(--text-soft);
  margin: 0;
}

.empty-state {
  margin: 0;
}

@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .graph-canvas {
    min-height: 52vh;
  }

  .status-text {
    text-align: left;
  }
}

@media (max-width: 720px) {
  .app-shell {
    padding: 0.75rem;
  }

  .topbar,
  .controls,
  .sidebar {
    padding: 1rem;
  }

  .topbar {
    flex-direction: column;
  }

  .topbar-actions {
    width: 100%;
    justify-content: stretch;
  }

  .topbar-actions > * {
    flex: 1 1 auto;
  }

  .graph-header {
    flex-direction: column;
    padding: 1rem 1rem 0;
  }

  .source-strip {
    padding: 0 1rem 1rem;
  }
}