/* ============================================================
   SATURN EDITOR UI - DESIGN SYSTEM v4
   Do not add visual rules above this block.
   ============================================================ */
:root {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-weight: 400;
  --bg-app: #f6f8fb;
  --bg-surface: rgba(255, 255, 255, 0.96);
  --bg-surface-2: #f8fafc;
  --bg-surface-3: #eef3f7;
  --text-main: #111827;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-faint: #94a3b8;
  --border-subtle: #e2e8f0;
  --border-strong: #cbd5e1;
  --primary: #1f5eff;
  --primary-hover: #1749c8;
  --primary-soft: #eaf1ff;
  --success: #0f766e;
  --success-soft: #dff7f3;
  --warning: #a16207;
  --warning-soft: #fef3c7;
  --danger: #b91c1c;
  --danger-soft: #fee2e2;
  --shadow-1: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-2: 0 10px 28px rgba(15, 23, 42, 0.10);
  --radius-1: 8px;
  --radius-2: 12px;
  --radius-3: 16px;
  --topbar-h: 52px;
  --nav-w: 76px;
  --inspector-w: clamp(580px, 35vw, 680px);
  --dock-w: 280px;
}
*,
*::before,
*::after { box-sizing: border-box; }
html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at top left, rgba(191, 219, 254, 0.55), transparent 28%),
    linear-gradient(180deg, #f8fbfd 0%, #edf3f8 100%);
  color: var(--text-main);
}
#map {
  position: fixed;
  inset: 0;
  z-index: 0;
}
.leaflet-container {
  font-family: inherit;
  background: #eef3f7;
}
.leaflet-tile-pane {
  filter: grayscale(0.35) saturate(0.58) brightness(1.04) contrast(0.96);
}
.saturn-ui {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  grid-template-columns: var(--nav-w) var(--inspector-w) minmax(0, 1fr);
  grid-template-rows: var(--topbar-h) minmax(0, 1fr);
  pointer-events: none;
}
.glass-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-2);
  backdrop-filter: blur(8px);
}
.app-topbar {
  grid-column: 1 / -1;
  grid-row: 1;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  height: var(--topbar-h);
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-1);
  pointer-events: auto;
}
.topbar-brand,
.topbar-meta,
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}
.topbar-brand { gap: 12px; }
.topbar-title {
  font-size: 0.95rem;
  font-weight: 800;
}
.topbar-status,
.mini-stat,
.panel-shell-note,
.empty-state p,
.overlay-tip,
.measure-panel .measure-status {
  color: var(--text-muted);
}
.topbar-status {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.82rem;
}
.topbar-pill {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  background: var(--bg-surface-2);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  white-space: nowrap;
}
.topbar-pill strong {
  color: var(--text-main);
  font-weight: 700;
}
.saturn-nav {
  grid-column: 1;
  grid-row: 2;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px 8px;
  background: #ffffff;
  border-right: 1px solid var(--border-subtle);
  pointer-events: auto;
}
.module-nav-button {
  min-height: 54px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 3px;
  width: 100%;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  text-align: left;
  cursor: pointer;
}
.module-nav-button:hover {
  background: var(--bg-surface-2);
  color: var(--text-main);
}
.module-nav-button.is-active {
  background: var(--primary-soft);
  color: var(--primary);
  border-color: rgba(31, 94, 255, 0.22);
  box-shadow: inset 3px 0 0 var(--primary);
}
.module-nav-button:disabled,
.saturn-panel button:disabled,
.app-topbar button:disabled {
  opacity: 0.55;
  cursor: default;
}
.module-nav-kicker {
  font-size: 0.68rem;
  font-weight: 700;
}
.module-nav-label {
  font-size: 0.75rem;
  line-height: 1.15;
}
.saturn-panel {
  grid-column: 2;
  grid-row: 2;
  min-width: 0;
  min-height: 0;
  height: calc(100vh - var(--topbar-h));
  overflow: hidden;
  border-top: none;
  border-bottom: none;
  border-left: none;
  border-radius: 0;
  background: rgba(255, 255, 255, 0.98);
  pointer-events: auto;
}
.panel-header,
.stat-grid { display: none; }
.panel-scroll {
  height: 100%;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 18px 18px 20px;
}
.panel-section {
  position: relative;
  margin-bottom: 16px;
  padding: 15px 15px 18px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-2);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(247, 250, 252, 0.98));
  box-shadow: var(--shadow-1);
}
.panel-section::before {
  content: "";
  position: absolute;
  top: 14px;
  left: 0;
  width: 4px;
  height: 22px;
  border-radius: 0 999px 999px 0;
  background: var(--primary);
}
#convSection::before { background: var(--warning); }
#validationSection::before { background: var(--danger); }
#t3Section::before,
#t3ArcSection::before { background: var(--success); }
#t6Section::before { background: #2563eb; }
.section-title {
  margin: 0 0 12px 10px;
  color: var(--text-secondary);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
}
.empty-state {
  margin-bottom: 16px;
  padding: 22px 20px;
  border: 1px dashed var(--border-strong);
  border-radius: 14px;
  background: #f8fafc;
  box-shadow: var(--shadow-1);
}
.empty-state[hidden],
.module-section[hidden] { display: none !important; }
.empty-state h2 {
  margin: 0 0 8px;
  font-size: 1.02rem;
  font-weight: 750;
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 14px;
}
.form-field,
.stacked-inputs {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}
.form-field label,
.field-label,
#t6Section label {
  display: block;
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
}
.saturn-panel input,
.saturn-panel select,
.saturn-panel textarea,
.saturn-panel button,
.app-topbar button {
  font-family: inherit;
}
.saturn-panel input,
.saturn-panel select,
.saturn-panel textarea {
  width: 100%;
  min-height: 36px;
  padding: 8px 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-1);
  background: #fff;
  color: var(--text-main);
  font-size: 0.84rem;
  box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.04);
}
.saturn-panel textarea {
  resize: vertical;
  line-height: 1.5;
}
.saturn-panel input[type="number"],
.numeric,
.node-id,
#t6NodesStr,
.measure-distance,
#hudActiveNode,
#hudUtm,
.arc-item-details,
#t3Pairs,
#t3StagesList,
#t6List {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
}
.saturn-panel input[type="number"] { text-align: right; }
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid rgba(31, 94, 255, 0.55);
  outline-offset: 2px;
}
.saturn-panel button,
.app-topbar button {
  min-height: 36px;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}
.saturn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 6px 14px rgba(31, 94, 255, 0.18);
}
.saturn-primary:hover { background: var(--primary-hover); }
.saturn-secondary {
  background: #ffffff;
  color: var(--text-main);
  border-color: var(--border-strong);
}
.saturn-secondary:hover { background: var(--bg-surface-2); }
.ghost-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border: 1px dashed var(--border-strong);
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
}
.ghost-btn .btn-icon {
  display: inline-flex;
  width: 18px;
  height: 18px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(31, 94, 255, 0.35);
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.85rem;
}
.button-row,
.toggle-row,
.measure-panel .measure-actions,
.t3-flex {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 36px;
  padding: 0 10px;
  border: 1px solid var(--border-subtle);
  border-radius: 9px;
  background: var(--bg-surface-2);
  color: var(--text-secondary);
  font-size: 0.8rem;
}
.checkbox-label input { accent-color: var(--primary); }
.card {
  margin-top: 12px;
  padding: 13px;
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  background: linear-gradient(180deg, var(--bg-surface-2), #ffffff);
  box-shadow: var(--shadow-1);
}
.card-title {
  margin: 0 0 10px;
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
}
.scroll-area {
  max-height: 220px;
  overflow-y: auto;
  overflow-x: hidden;
}
.arc-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-right: 4px;
}
.arc-item,
#t6List .route-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 8px;
  padding: 9px 10px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  background: #fff;
  box-shadow: var(--shadow-1);
}
.arc-item-details {
  min-width: 0;
  font-size: 0.8rem;
  line-height: 1.35;
  color: var(--text-main);
}
.arc-item-details span,
#selectionSummary,
#validationResults,
#t3NodeInfo,
#t2NodesList,
#arcsList,
#t6List { color: var(--text-secondary); }
#t6List .route-item span {
  min-width: 0;
  margin-right: 8px;
  font-size: 0.9rem;
}
#t6EditIndicator {
  display: block;
  margin: 12px 0 6px;
  color: var(--primary);
  font-size: 0.95rem;
  font-weight: 700;
}
#t6NodesStr {
  min-height: 120px;
  font-size: 13px;
  line-height: 1.55;
  resize: vertical;
}
.turns-grid {
  display: grid;
  gap: 6px;
}
.turn-row {
  display: grid;
  grid-template-columns: 1fr 62px 62px 64px;
  gap: 8px;
}
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.75rem;
}
.tag {
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--success-soft);
  color: var(--success);
}
.validation-item {
  margin-bottom: 6px;
  padding: 8px 10px;
  border: 1px solid #fed7aa;
  border-radius: 8px;
  background: #fff8f2;
  box-shadow: var(--shadow-1);
  cursor: pointer;
}
.validation-item strong {
  display: block;
  color: #c2410c;
  font-size: 0.85rem;
}
.validation-item span {
  display: block;
  color: #9a3412;
  font-size: 0.75rem;
}
.saturn-side {
  grid-column: 3;
  grid-row: 2;
  justify-self: end;
  align-self: start;
  width: var(--dock-w);
  max-width: calc(100vw - var(--nav-w) - var(--inspector-w) - 32px);
  max-height: calc(100vh - var(--topbar-h) - 24px);
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}
.saturn-side > * { pointer-events: auto; }
.map-overlay,
.legend-panel,
.measure-panel {
  width: 100%;
  max-width: 280px;
  margin: 0;
  overflow: hidden;
  padding: 10px 12px;
  border: 1px solid rgba(203, 213, 225, 0.9);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.10);
  backdrop-filter: blur(8px);
}
.map-overlay *,
.legend-panel *,
.measure-panel * {
  min-width: 0;
  overflow-wrap: anywhere;
}
.overlay-stack {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.overlay-pill {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  min-height: 28px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}
.overlay-pill span {
  font-size: 11px;
  color: var(--text-muted);
}
.overlay-pill strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
}
.overlay-tip {
  margin: 6px 0 0;
  padding-top: 8px;
  border-top: 1px solid var(--border-subtle);
  font-size: 12px;
}
.legend-panel h4,
.measure-panel h4 {
  margin: 0 0 10px;
  font-size: 0.85rem;
}
.measure-panel .measure-distance {
  font-size: 1.05rem;
  font-weight: 700;
}
.measure-panel .measure-actions button {
  flex: 1 1 110px;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 6px 0;
  font-size: 0.82rem;
}
.legend-swatch {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  border: 1px solid rgba(15, 23, 42, 0.14);
}
.leaflet-popup-content {
  font-size: 12px;
  color: var(--text-main);
}
.saturn-dot { cursor: pointer; }
.saturn-dot > div {
  transition: transform 0.08s ease;
  transform-origin: center center;
}
.saturn-dot:hover > div { transform: scale(1.25); }
.saturn-dot.active {
  z-index: 1002 !important;
}
.saturn-dot.active > div {
  transform: scale(1.35);
  box-shadow:
    0 0 0 3px #ffffff,
    0 0 0 6px rgba(15, 98, 254, 0.26),
    0 8px 18px rgba(15, 23, 42, 0.22);
}
.saturn-dot.related {
  z-index: 1001 !important;
}
.saturn-dot.related > div {
  transform: scale(1.22);
  box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.18);
}
.saturn-cluster {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: rgba(15, 98, 254, 0.88);
  border: 2px solid rgba(255, 255, 255, 0.95);
  color: #ffffff;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  font-weight: 800;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.22);
}
.saturn-cluster.medium {
  background: rgba(8, 145, 178, 0.84);
}
.saturn-tooltip {
  padding: 3px 6px;
  border: 1px solid rgba(148, 163, 184, 0.55);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.92);
  color: #1f2937;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.14);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  font-weight: 700;
}
#t6ExternalSection {
  border-top: 1px dashed var(--border-subtle) !important;
}
#t6ExternalSection p {
  color: var(--text-muted) !important;
}
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.5);
  border-radius: 999px;
}
@media (max-width: 1366px) {
  :root {
    --inspector-w: 560px;
    --nav-w: 72px;
  }
}
@media (max-width: 1180px) {
  .app-topbar {
    grid-template-columns: minmax(0, 1fr);
    height: auto;
    padding: 10px 12px;
  }
  .topbar-meta,
  .topbar-actions {
    justify-content: flex-start;
    flex-wrap: wrap;
  }
}
@media (max-width: 1100px) {
  .saturn-ui {
    grid-template-columns: 72px minmax(460px, 560px) minmax(0, 1fr);
  }
}
@media (max-width: 1024px) {
  .saturn-ui {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto minmax(0, 1fr);
  }
  .app-topbar,
  .saturn-nav,
  .saturn-panel,
  .saturn-side {
    grid-column: 1;
  }
  .saturn-nav {
    grid-row: 2;
    flex-direction: row;
    overflow-x: auto;
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
    padding: 10px 12px;
  }
  .module-nav-button { min-width: 110px; }
  .saturn-panel {
    grid-row: 3;
    width: 100%;
    max-width: none;
    max-height: none;
    height: auto;
  }
  .saturn-side { display: none; }
}