* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: #1a1a1a;
  color: #e0e0e0;
}
header {
  padding: 0.5rem 1rem;
  background: #2a2a2a;
  border-bottom: 1px solid #444;
}
header h1 { margin: 0 0 0.5rem 0; font-size: 1.25rem; }
.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
}
.toolbar label { color: #aaa; }
.toolbar select, .toolbar input[type="text"] {
  padding: 0.25rem 0.5rem;
  background: #333;
  color: #fff;
  border: 1px solid #555;
  border-radius: 4px;
}
.toolbar button {
  padding: 0.35rem 0.75rem;
  background: #0a7;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}
.toolbar button:hover { background: #0b8; }
.toolbar button.selected { background: #084; }
.link-mode-exit { margin: 0.35rem 0; font-size: 0.85rem; }
.link-mode-exit.hidden { display: none; }
.link-mode-exit button { margin-left: 0.25rem; padding: 0.2rem 0.5rem; background: #555; color: #fff; border: 1px solid #666; border-radius: 4px; cursor: pointer; }
.link-mode-exit button:hover { background: #666; }

.main {
  display: flex;
  min-height: calc(100vh - 100px);
}
.left, .right {
  width: 200px;
  padding: 0.75rem;
  background: #222;
  border-right: 1px solid #333;
}
.right { border-right: none; border-left: 1px solid #333; }
.center {
  flex: 1;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow: auto;
}

.panel {
  margin-bottom: 1rem;
}
/* Toast message (e.g. limit reached) */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.5rem 1rem;
  background: #c44;
  color: #fff;
  border-radius: 8px;
  font-size: 0.9rem;
  max-width: 90%;
  z-index: 10000;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
  transition: opacity 0.2s;
}
.toast.hidden { display: none; }

.cap-label { font-size: 0.75rem; color: #888; font-weight: normal; margin-left: 0.25rem; }
.cap-label.over-limit { color: #f88; }

.panel h3 { margin: 0 0 0.5rem 0; font-size: 0.95rem; color: #8af; }
.panel .hint { font-size: 0.75rem; color: #888; margin: 0.25rem 0; }
.panel ul { margin: 0.25rem 0; padding-left: 1.25rem; font-size: 0.85rem; list-style: none; padding-left: 0; }
.panel ul li { margin-bottom: 0.25rem; }
.panel .switch-link { margin-left: 0.25rem; padding: 0.2rem; font-size: 0.8rem; background: #333; color: #fff; border: 1px solid #555; border-radius: 4px; }
.panel .door-orient { margin-left: 0.25rem; padding: 0.15rem 0.25rem; font-size: 0.75rem; background: #333; color: #fff; border: 1px solid #555; border-radius: 4px; }
.entity-list-panel ul li[data-entity] { cursor: pointer; padding: 0.2rem 0; }
.entity-list-panel ul li[data-entity]:hover { color: #8af; }
.entity-list-panel ul li[data-entity].highlight { background: #333; color: #8af; border-radius: 4px; padding-left: 0.25rem; }
.entity-list-panel .entity-angle { margin-left: 0.25rem; padding: 0.1rem; font-size: 0.75rem; background: #333; color: #fff; border: 1px solid #555; border-radius: 4px; max-width: 3em; }

.brush-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  margin-bottom: 0.5rem;
}
.brush-cell {
  width: 28px;
  height: 28px;
  border: 2px solid #555;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: bold;
}
.brush-cell:hover { border-color: #8af; }
.brush-cell.selected { border-color: #0a7; background: #0a72; }

.entity-btn, .panel select {
  display: block;
  width: 100%;
  margin-bottom: 0.35rem;
  padding: 0.35rem;
  background: #333;
  color: #fff;
  border: 1px solid #555;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
}
.entity-btn:hover, .panel select:hover { background: #444; }

.grid-wrap {
  position: relative;
  border: 2px solid #444;
  border-radius: 4px;
  overflow: hidden;
  background: #111;
}
.grid-overlay {
  position: absolute;
  left: 0;
  top: 0;
  pointer-events: none;
  display: block;
}
.grid-tooltip {
  position: fixed;
  padding: 0.25rem 0.5rem;
  background: #333;
  color: #fff;
  border: 1px solid #555;
  border-radius: 4px;
  font-size: 0.8rem;
  white-space: nowrap;
  z-index: 100;
  pointer-events: none;
}
.grid-tooltip.hidden { display: none; }
#grid {
  display: block;
  cursor: crosshair;
}
.status {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: #888;
}
.preview-section { margin-top: 1rem; width: 100%; max-width: 600px; }
.preview-heading { font-size: 0.95rem; color: #8af; margin: 0 0 0.35rem 0; }
.preview-hint { font-size: 0.75rem; color: #666; font-weight: normal; }
#previewCanvas { display: block; width: 100%; border: 2px solid #444; border-radius: 4px; background: #111; cursor: crosshair; }
#previewCanvas:focus { outline: 1px solid #0a7; }
#btnResetPreview { margin-top: 0.35rem; padding: 0.25rem 0.5rem; background: #555; color: #fff; border: 1px solid #666; border-radius: 4px; cursor: pointer; font-size: 0.85rem; }
#btnResetPreview:hover { background: #666; }

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal.hidden { display: none; }
.modal-content {
  background: #2a2a2a;
  border: 1px solid #555;
  border-radius: 8px;
  padding: 1rem;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}
.modal-content h3 { margin: 0 0 0.5rem 0; }
.modal-content p { margin: 0.25rem 0; font-size: 0.9rem; }
.modal-content textarea:not(.export-section-textarea) {
  width: 800px;
  height: 400px;
  margin: 0.5rem 0;
  padding: 0.5rem;
  font-family: monospace;
  font-size: 0.8rem;
  background: #111;
  color: #0f0;
  border: 1px solid #444;
  border-radius: 4px;
  resize: both;
}
.modal-content button {
  padding: 0.35rem 0.75rem;
  background: #555;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}
.integration-checklist { background: #252530; padding: 0.75rem; border-radius: 8px; margin-bottom: 0.75rem; }
.integration-checklist .checklist-title { margin: 0 0 0.5rem 0; font-size: 0.9rem; color: #9cf; }
.integration-checklist .checklist-steps { margin: 0; padding-left: 1.25rem; font-size: 0.85rem; line-height: 1.45; }
.integration-checklist .checklist-steps li { margin-bottom: 0.35rem; }
.integration-checklist .hint { margin: 0.5rem 0 0 0; font-size: 0.75rem; color: #888; }
.modal-content .modal-buttons { display: flex; gap: 0.5rem; margin-top: 0.5rem; flex-wrap: wrap; }
.modal-content-wide { max-width: 560px; }
.modal-content-export { max-width: 900px; width: 900px; }

/* Export sections */
.export-sections { overflow-y: auto; max-height: 70vh; display: flex; flex-direction: column; gap: 0.6rem; padding-right: 0.25rem; }
.export-section { border: 1px solid #444; border-radius: 6px; overflow: hidden; }
.export-section-header {
  display: flex; align-items: center; justify-content: space-between;
  background: #1a2530; padding: 0.35rem 0.6rem; border-bottom: 1px solid #444;
}
.export-section-title { font-family: monospace; font-size: 0.82rem; font-weight: bold; color: #9cf; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.export-copy-btn {
  flex-shrink: 0; margin-left: 0.5rem; padding: 0.2rem 0.65rem;
  font-size: 0.75rem; font-weight: bold; letter-spacing: 0.04em;
  background: #3a6; color: #fff; border: none; border-radius: 4px; cursor: pointer;
  transition: background 0.15s;
}
.export-copy-btn:hover { background: #4b7; }
.export-copy-btn.copied { background: #27a; }
.export-section-textarea {
  width: 100%; box-sizing: border-box; margin: 0; padding: 0.45rem 0.6rem;
  font-family: monospace; font-size: 0.78rem; line-height: 1.35;
  background: #111; color: #0f0; border: none; resize: vertical;
}
.help-content { font-size: 0.9rem; margin: 0.5rem 0; }
.help-content ul { margin: 0.35rem 0; padding-left: 1.5rem; }
.help-content p { margin: 0.5rem 0; }
.help-content code { background: #333; padding: 0.1rem 0.3rem; border-radius: 4px; }
.modal-content #loadJsonText { width: 100%; min-height: 120px; margin: 0.5rem 0; padding: 0.5rem; font-family: monospace; font-size: 0.8rem; background: #111; color: #0f0; border: 1px solid #444; border-radius: 4px; resize: vertical; }

/* Tile colors for grid (approximate VB red palette) */
.t0 { background: #1a0a0a; }
.t1 { background: #8b4513; }   /* STARTAN */
.t2 { background: #555; }   /* STONE */
.t3 { background: #4a4a6a; } /* TECH */
.t4 { background: #6a3a2a; } /* DOOR */
.t5 { background: #5a4a3a; } /* SWITCH */
.t6 { background: #7a3525; } /* secret brick */
.t7 { background: #454545; } /* secret stone */
.t8 { background: #3a3a5a; } /* secret tech */
.t9 { background: #8b2a2a; } /* key red */
.t10 { background: #8b7a2a; } /* key yellow */
.t11 { background: #2a4a8b; } /* key blue */
.spawn { background: #0a5; }
.enemy { background: #a50; }
.pickup { background: #5a5; }