* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #242734;
  --border: #2e3142;
  --text: #e1e4ed;
  --text-dim: #8b8fa3;
  --accent: #5b8cf7;
  --accent-hover: #7ba3ff;
  --danger: #f75b5b;
  --success: #5bf78b;
  --raster-color: #f7a85b;
  --web-color: #5b8cf7;
  --font: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1.2rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

header h1 {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--accent);
}

.header-controls {
  display: flex;
  gap: 0.5rem;
}

.header-sep {
  width: 1px;
  height: 20px;
  background: var(--border);
  margin: 0 0.2rem;
}

.upload-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.8rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.15s;
}

.upload-btn:hover { border-color: var(--accent); color: var(--accent); }
.upload-btn input { display: none; }

button {
  padding: 0.4rem 0.8rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.15s;
}

button:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
button:disabled { opacity: 0.4; cursor: not-allowed; }

#solveBtn {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

#solveBtn:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }
#solveBtn:disabled { background: var(--surface2); border-color: var(--border); color: var(--text-dim); }

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.panels {
  flex: 1;
  display: flex;
  gap: 2px;
  min-height: 0;
}

.panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.35rem 0.8rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.panel-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

#rasterPanel .panel-title { color: var(--raster-color); }
#webPanel .panel-title { color: var(--web-color); }

.panel-hint {
  font-size: 0.7rem;
  color: var(--text-dim);
}

.map-container {
  flex: 1;
  background: var(--surface2);
}

/* Leaflet dark theme overrides */
.leaflet-container { background: var(--surface2) !important; }
.leaflet-tile-pane { filter: none; }

.bottom-bar {
  display: flex;
  gap: 2px;
  min-height: 200px;
  max-height: 35vh;
  height: 260px;
  flex-shrink: 0;
  border-top: 1px solid var(--border);
}

.points-section, .results-section, .overlay-section {
  flex: 1;
  background: var(--surface);
  padding: 0.6rem 0.8rem;
  overflow-y: auto;
}

.points-section h3, .results-section h3, .overlay-section h3 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: 0.4rem;
}

#pointCount { color: var(--accent); }

.points-table-wrap { overflow-y: auto; max-height: 160px; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.75rem;
  font-family: var(--font);
}

th {
  text-align: left;
  padding: 0.25rem 0.4rem;
  color: var(--text-dim);
  font-weight: 500;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--surface);
}

td {
  padding: 0.25rem 0.4rem;
  border-bottom: 1px solid var(--border);
}

tr.incomplete td { opacity: 0.5; }
tr:hover td { background: var(--surface2); }

.delete-btn {
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 0.8rem;
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
}

.delete-btn:hover { background: rgba(247, 91, 91, 0.15); }

.placeholder {
  color: var(--text-dim);
  font-size: 0.8rem;
  text-align: center;
  padding: 2rem;
}

/* Results */
.results-warning {
  background: rgba(232, 168, 56, 0.12);
  border: 1px solid rgba(232, 168, 56, 0.3);
  border-radius: 5px;
  padding: 0.4rem 0.6rem;
  margin-bottom: 0.5rem;
  font-size: 0.7rem;
  line-height: 1.4;
  color: #e8a838;
}

.results-warning-icon {
  margin-right: 0.25rem;
}

.results-info {
  font-size: 0.65rem;
  color: var(--text-dim);
  margin-bottom: 0.35rem;
  text-align: right;
}

.result-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem 0.7rem;
  margin-bottom: 0.4rem;
  cursor: pointer;
  transition: border-color 0.15s;
}

.result-card:hover { border-color: var(--accent); }

.result-card.best {
  border-color: var(--success);
  box-shadow: 0 0 12px rgba(91, 247, 139, 0.1);
}

.result-rank {
  font-size: 0.65rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.15rem;
}

.result-card.unlikely { opacity: 0.55; }

.badge {
  display: inline-block;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  vertical-align: middle;
}

.badge-best { background: var(--success); color: #111; }
.badge-tied { background: var(--accent); color: #fff; }
.badge-plausible { background: #b89b5b; color: #111; }
.badge-unlikely { background: var(--surface2); color: var(--text-dim); border: 1px solid var(--border); }

.result-norm {
  color: var(--text-dim);
  font-size: 0.65rem;
  margin-left: 0.3rem;
}

.result-pt-errors {
  font-size: 0.62rem;
  color: var(--text-dim);
  margin-top: 0.15rem;
  font-family: var(--font);
}

.pt-err {
  display: inline-block;
  padding: 0 0.2rem;
  border-radius: 2px;
  background: rgba(255,255,255,0.04);
}

.pt-err-bad {
  color: var(--danger);
  background: rgba(247, 91, 91, 0.1);
}

.result-proj4 {
  font-family: var(--font);
  font-size: 0.72rem;
  color: var(--text);
  word-break: break-all;
  line-height: 1.4;
}

.result-residual {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 0.2rem;
}

.p-value {
  font-size: 0.6rem;
  color: var(--text-dim);
  font-style: italic;
}

.result-loocv {
  margin-right: 0.6rem;
}

.result-loocv strong {
  color: var(--success);
}

.result-rms {
  color: var(--text-dim);
  font-size: 0.65rem;
}

.result-residual strong {
  color: var(--accent);
}

.result-shear {
  margin-left: 0.6rem;
  color: var(--text-dim);
  font-size: 0.65rem;
}

.shear-warn {
  color: #e8a838;
  font-size: 0.7rem;
}

/* Custom markers */
.numbered-marker {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  border: 2px solid #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,0.4);
}

.numbered-marker.raster { background: var(--raster-color); }
.numbered-marker.web { background: var(--web-color); }
.numbered-marker.pending { opacity: 0.5; border-style: dashed; }

/* Selected result */
.result-card.selected {
  border-color: var(--accent);
  background: rgba(91, 140, 247, 0.1);
  box-shadow: 0 0 12px rgba(91, 140, 247, 0.15);
}

.result-actions {
  display: flex;
  gap: 0.3rem;
  margin-top: 0.3rem;
}

.result-card .select-btn,
.result-card .round-btn {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  font-size: 0.65rem;
  font-weight: 600;
  border-radius: 4px;
}

.result-card .select-btn {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.result-card .select-btn:hover { background: var(--accent-hover); }

.result-card .round-btn {
  background: var(--surface2);
  border-color: var(--border);
  color: var(--text-dim);
}

.result-card .round-btn:hover:not(:disabled) {
  border-color: #f7d85b;
  color: #f7d85b;
}

.round-results {
  margin-top: 0.3rem;
}

.round-variant {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.35rem 0.5rem;
  margin-top: 0.25rem;
  cursor: default;
}

.round-variant.round-good { border-left: 3px solid var(--success); }
.round-variant.round-ok { border-left: 3px solid #f7d85b; }
.round-variant.round-bad { border-left: 3px solid var(--danger); }

.round-proj4 {
  font-family: var(--font);
  font-size: 0.7rem;
  color: var(--text);
  word-break: break-all;
  line-height: 1.35;
}

.round-stats {
  font-size: 0.65rem;
  color: var(--text-dim);
  margin-top: 0.15rem;
}

.round-stats strong { color: var(--accent); }

.round-delta {
  margin-left: 0.3rem;
}

.round-method {
  margin-left: 0.3rem;
  font-style: italic;
  opacity: 0.6;
}

.round-actions {
  display: flex;
  gap: 0.25rem;
  margin-top: 0.2rem;
}

.round-actions button {
  padding: 0.15rem 0.4rem;
  font-size: 0.6rem;
  border-radius: 3px;
}

.round-use-btn {
  background: var(--success) !important;
  border-color: var(--success) !important;
  color: #111 !important;
  font-weight: 600;
}

.round-copy-btn {
  background: var(--surface2) !important;
  border-color: var(--border) !important;
  color: var(--text-dim) !important;
}

.round-error, .round-none {
  font-size: 0.68rem;
  color: var(--text-dim);
  font-style: italic;
  margin-top: 0.2rem;
}

/* Overlay section */
.overlay-controls { display: flex; flex-direction: column; gap: 0.4rem; }
.overlay-controls.hidden { display: none; }

.overlay-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.overlay-row select {
  flex: 1;
  padding: 0.3rem 0.4rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-size: 0.75rem;
}

.overlay-row label {
  font-size: 0.72rem;
  color: var(--text-dim);
  cursor: pointer;
}

.overlay-row input[type="checkbox"] {
  accent-color: var(--accent);
}

.upload-btn.small {
  padding: 0.25rem 0.5rem;
  font-size: 0.7rem;
}

.overlay-hint {
  font-size: 0.68rem;
  color: var(--text-dim);
  font-style: italic;
  margin-top: 0.2rem;
}

.export-row {
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  align-items: center;
}

.export-btn {
  background: var(--accent) !important;
  border-color: var(--accent) !important;
  color: #fff !important;
  font-weight: 600;
  padding: 0.3rem 0.7rem;
  font-size: 0.72rem;
}

.export-btn:hover:not(:disabled) { background: var(--accent-hover) !important; }

.export-status {
  font-size: 0.68rem;
  margin-left: 0.5rem;
}

.export-status a {
  color: var(--success);
  text-decoration: underline;
  font-weight: 600;
}

.export-error { color: var(--danger); }
.export-success { color: var(--success); }

#overlayBtn {
  background: var(--success);
  border-color: var(--success);
  color: #111;
  font-weight: 600;
}

#overlayBtn:hover:not(:disabled) { opacity: 0.85; }

/* Graticule labels */
.graticule-label {
  font-size: 9px;
  font-family: var(--font);
  color: rgba(255, 255, 255, 0.4);
  text-align: center;
  line-height: 14px;
  pointer-events: none !important;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.9), 0 0 4px rgba(0, 0, 0, 0.7);
  background: none !important;
  border: none !important;
  white-space: nowrap;
}

/* Raster toolbar */
.raster-toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
  flex-wrap: wrap;
}

.opacity-ctrl {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.7rem;
  color: var(--text-dim);
  cursor: pointer;
}

.opacity-icon { font-size: 0.85rem; }

.opacity-ctrl input[type="range"] {
  width: 60px;
  height: 3px;
  accent-color: var(--raster-color);
}

/* Link maps toggle */
.link-toggle {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.7rem;
  color: var(--text-dim);
  cursor: pointer;
  margin-left: auto;
  user-select: none;
}

.link-toggle input { accent-color: var(--accent); width: 14px; height: 14px; }
.link-icon { font-size: 0.8rem; }
.link-toggle:has(input:checked) { color: var(--accent); }

/* Zoom-extent button — appended inside Leaflet zoom control */
.leaflet-control-zoom-extent {
  display: block;
  width: 30px;
  height: 30px;
  line-height: 30px;
  text-align: center;
  text-decoration: none;
  font-size: 16px;
  color: #333;
  background: #fff;
  border-top: 1px solid #ccc;
}

.leaflet-control-zoom-extent:hover { background: #f4f4f4; color: #333; }

/* Overlay style controls */
.overlay-style-row {
  gap: 0.6rem;
}

.overlay-style-label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.68rem;
  color: var(--text-dim);
}

.overlay-style-label input[type="color"] {
  width: 22px;
  height: 22px;
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0;
  cursor: pointer;
  background: none;
}

.overlay-style-label input[type="range"] {
  width: 50px;
  height: 3px;
  accent-color: var(--success);
}

.overlay-style-label span {
  font-family: var(--font);
  font-size: 0.62rem;
  min-width: 1.5em;
}

/* Outlier rows in control points table */
tr.outlier td { color: var(--danger); }
tr.outlier td:first-child::before {
  content: "⚠ ";
  font-size: 0.65rem;
}

.error-cell {
  font-family: var(--font);
  font-size: 0.7rem;
}

.error-cell.high { color: var(--danger); font-weight: 600; }

/* Crosshair cursor when clicking */
.crosshair-mode { cursor: crosshair !important; }
.crosshair-mode * { cursor: crosshair !important; }

/* ─── Graticule Trace Tool ─── */
.trace-toggle-btn {
  padding: 0.25rem 0.6rem;
  font-size: 0.7rem;
  border-radius: 4px;
  margin-left: auto;
}

.trace-toggle-btn.active {
  background: #f7d85b;
  border-color: #f7d85b;
  color: #111;
  font-weight: 700;
}

.trace-panel {
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
  padding: 0.5rem 0.9rem;
  flex-shrink: 0;
}

.trace-panel.hidden { display: none; }

.trace-instruction {
  font-size: 0.75rem;
  color: var(--text);
  margin-bottom: 0.4rem;
  line-height: 1.4;
}

.trace-inputs {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.3rem;
  flex-wrap: wrap;
}

.trace-inputs label {
  font-size: 0.72rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.trace-inputs input[type="number"] {
  width: 80px;
  padding: 0.25rem 0.4rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-size: 0.75rem;
  font-family: var(--font);
}

.trace-inputs button {
  padding: 0.25rem 0.6rem;
  font-size: 0.7rem;
}

.trace-inputs button:not(.trace-cancel) {
  background: #f7d85b;
  border-color: #f7d85b;
  color: #111;
  font-weight: 600;
}

.trace-inputs button:not(.trace-cancel):hover:not(:disabled) {
  background: #f5e580;
}

.trace-cancel {
  background: var(--surface2) !important;
  border-color: var(--border) !important;
  color: var(--text-dim) !important;
}

.trace-wp-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin-bottom: 0.3rem;
}

.trace-wp-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0.15rem 0.4rem;
  background: rgba(247, 216, 91, 0.12);
  border: 1px solid rgba(247, 216, 91, 0.3);
  border-radius: 3px;
  font-size: 0.65rem;
  font-family: var(--font);
  color: var(--text);
}

.trace-wp-del {
  background: none !important;
  border: none !important;
  padding: 0 0.15rem !important;
  font-size: 0.6rem;
  color: var(--danger);
  cursor: pointer;
  line-height: 1;
}

.trace-controls-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.35rem;
  flex-wrap: wrap;
}

.trace-autofill {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.72rem;
  color: var(--text-dim);
}

.trace-autofill input[type="number"] {
  width: 50px;
  padding: 0.2rem 0.3rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-size: 0.72rem;
  font-family: var(--font);
}

.trace-tension {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.68rem;
  color: var(--text-dim);
}

.trace-tension label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.trace-tension input[type="range"] {
  width: 80px;
  height: 4px;
  accent-color: #f7d85b;
}

.trace-tension span {
  font-family: var(--font);
  font-size: 0.65rem;
  min-width: 2.2em;
}

.trace-point-count {
  font-size: 0.68rem;
  color: var(--text-dim);
  margin-bottom: 0.3rem;
}

.trace-mode-toggle {
  display: flex;
  gap: 0;
  margin-bottom: 0.35rem;
}

.trace-mode-btn {
  padding: 0.2rem 0.6rem;
  font-size: 0.68rem;
  border-radius: 0;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text-dim);
  cursor: pointer;
}

.trace-mode-btn:first-child { border-radius: 4px 0 0 4px; }
.trace-mode-btn:last-child { border-radius: 0 4px 4px 0; border-left: none; }

.trace-mode-btn.active {
  background: #f7d85b;
  border-color: #f7d85b;
  color: #111;
  font-weight: 700;
}

.trace-handle {
  width: 14px;
  height: 14px;
  background: #f7d85b;
  border: 2px solid #fff;
  border-radius: 2px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.5);
  cursor: grab;
  transform: rotate(45deg);
}

.trace-marker {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
  color: #111;
  border: 2px solid #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,0.5);
}

.trace-curve-pt {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #5bf78b;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  font-weight: 700;
  color: #111;
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.4);
}

/* Loading modal */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 9999;
  align-items: center;
  justify-content: center;
}

.modal-overlay.visible { display: flex; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem 3rem;
  text-align: center;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 1rem;
}

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

.progress-bar {
  width: 200px;
  height: 4px;
  background: var(--surface2);
  border-radius: 2px;
  margin-top: 0.8rem;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width 0.3s;
  border-radius: 2px;
}