:root {
  --bg: #1a1a1d;
  --fg: #e8e8e8;
  --muted: #888;
  --accent: #4ea1f3;
  --panel: #232328;
  --border: #353539;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--fg);
  font-size: 14px;
}

#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: 0;
}

header {
  padding: 12px 20px 8px;
  border-bottom: 1px solid var(--border);
}

header h1 {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
}

.subtitle {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 12px;
}

main {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 16px;
  padding: 16px 20px;
  flex: 1;
  align-items: start;
}

#canvas-pane {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

canvas {
  background: #000;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  border: 1px solid var(--border);
  max-width: 100%;
  height: auto;
}

#stats {
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 12px;
  color: var(--muted);
  white-space: pre-wrap;
}

#controls {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.control-block {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-block[hidden] {
  display: none;
}

.control-block h2 {
  margin: 0 0 4px 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

label {
  font-size: 12px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

button, select, input, textarea {
  background: #0e0e10;
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 5px 9px;
  font: inherit;
}

button {
  cursor: pointer;
  background: #2c2c32;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button:hover:not(:disabled) {
  background: #393940;
}

input[type="range"] { padding: 0; }
input[type="number"] { width: 100px; }

textarea {
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 12px;
  width: 100%;
}

.parameter-row {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  gap: 4px;
  align-items: center;
  margin-bottom: 4px;
}

.parameter-row .param-name {
  color: var(--fg);
  font-size: 12px;
}

.parameter-row input[type="number"] { width: 90px; }

footer {
  padding: 12px 20px;
  font-size: 11px;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

footer p { margin: 0; }
footer code { color: var(--accent); }

.muted { color: var(--muted); font-size: 12px; margin: 0; }

.tile-info {
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 12px;
  color: var(--fg);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 9px;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 26px;
}

.tile-info.empty {
  color: var(--muted);
}

.tile-info.pinned {
  border-color: var(--accent);
}

.tile-info .swatch {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 1px solid var(--border);
  border-radius: 2px;
  flex-shrink: 0;
}

.tile-info .pin-hint {
  margin-left: auto;
  color: var(--muted);
  font-size: 11px;
}

.tileset-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tileset-panel[hidden] { display: none; }

.tileset-header {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.tileset-header h3 {
  margin: 0;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tileset-table-wrap {
  max-height: 280px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 4px;
}

#tileset-table {
  width: 100%;
  border-collapse: collapse;
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 12px;
}

#tileset-table thead th {
  position: sticky;
  top: 0;
  background: var(--panel);
  color: var(--muted);
  font-weight: 500;
  text-align: left;
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
  z-index: 1;
}

#tileset-table tbody td {
  padding: 4px 8px;
  border-bottom: 1px solid #2a2a2f;
  vertical-align: middle;
}

#tileset-table tbody tr:last-child td { border-bottom: none; }

#tileset-table tbody tr:hover { background: #2a2a30; }

#tileset-table tbody tr.pinned {
  outline: 1px solid var(--accent);
  outline-offset: -1px;
}

#tileset-table td canvas {
  display: block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  border: 1px solid var(--border);
  border-radius: 2px;
  cursor: pointer;
}

#tileset-table td.col-id { color: var(--muted); }
#tileset-table td.col-name { color: var(--fg); }
#tileset-table td.col-glue { color: var(--accent); }
#tileset-table td.col-glue.empty { color: var(--muted); }

#tileset-table.no-conc th.col-conc,
#tileset-table.no-conc td.col-conc { display: none; }
#tileset-table.no-glues th.col-glue,
#tileset-table.no-glues td.col-glue { display: none; }

#tileset-table input[type="number"],
#glue-table input[type="number"] {
  width: 76px;
  padding: 1px 4px;
  font: inherit;
}

#tileset-table td.col-conc input[type="number"],
#glue-table input[type="number"] {
  appearance: textfield;
  -moz-appearance: textfield;
}

#tileset-table td.col-conc input[type="number"]::-webkit-outer-spin-button,
#tileset-table td.col-conc input[type="number"]::-webkit-inner-spin-button,
#glue-table input[type="number"]::-webkit-outer-spin-button,
#glue-table input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

#tileset-table select {
  padding: 1px 4px;
  font: inherit;
  max-width: 92px;
}

#glue-table {
  width: 100%;
  border-collapse: collapse;
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 12px;
}

#glue-table thead th {
  position: sticky;
  top: 0;
  background: var(--panel);
  color: var(--muted);
  font-weight: 500;
  text-align: left;
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
  z-index: 1;
}

#glue-table tbody td {
  padding: 4px 8px;
  border-bottom: 1px solid #2a2a2f;
  vertical-align: middle;
}

#glue-table tbody tr:last-child td { border-bottom: none; }

#glue-table td.col-id { color: var(--muted); }
#glue-table td.col-name { color: var(--accent); }

#glue-table td.col-pair { color: var(--fg); }
#glue-table td.col-pair .glue-id { color: var(--muted); margin-left: 6px; font-size: 11px; }
#glue-table td.col-pair .self-tag { color: var(--muted); margin-left: 4px; font-size: 11px; }

#glue-table.no-ds th.col-ds,
#glue-table.no-ds td.col-ds { display: none; }

canvas { cursor: crosshair; }

#importfile-block code {
  color: var(--accent);
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
}

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