:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --border: #d8dde3;
  --text: #1f2937;
  --muted: #6b7280;
  --accent: #2563eb;
  --error-bg: #fff3f3;
  --error-border: #f0b2b2;
  --error-text: #a61b1b;
  --pane-left: 50%;
  --pane-top: 42%;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  font-family: "Malgun Gothic", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

#top-bar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 16px;
  background: #1f2937;
  color: #fff;
  border-bottom: 1px solid #111827;
}

.toolbar-left,
.toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.toolbar-right {
  flex: 1;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 8px;
}

.toolbar-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  width: 100%;
}

#main {
  flex: 1;
  display: flex;
  gap: 0;
  padding: 16px;
  min-height: 0;
}

#editor-pane,
#preview-pane {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

#editor-pane {
  width: var(--pane-left);
  min-width: 280px;
}

#preview-pane {
  flex: 1;
  min-width: 280px;
}

#pane-divider {
  width: 10px;
  margin: 0 8px;
  border-radius: 8px;
  background: #dbe2ea;
  cursor: col-resize;
  flex: 0 0 auto;
}

#pane-divider:hover {
  background: #c5d0db;
}

.pane-title {
  padding: 12px 14px;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
  background: #f9fafb;
}

.pane-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

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

.btn-light {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  padding: 4px 8px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
}

.btn-light:hover {
  background: #f3f4f6;
}

#raw-code-editor {
  flex: 1;
  width: 100%;
  border: 0;
  outline: none;
  resize: none;
  padding: 16px;
  font-family: Consolas, "Courier New", monospace;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
}

#raw-code-editor.editor-dark {
  background: #0b1220;
  color: #dbe7ff;
}

.editor-help {
  border-top: 1px solid var(--border);
  padding: 10px 14px;
  font-size: 12px;
  color: var(--muted);
  background: #fafafa;
}

#render-wrapper {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 16px;
  background: #f8fafc;
}

#render {
  min-height: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  transform-origin: top center;
}

#error {
  display: none;
  padding: 10px 14px;
  border-top: 1px solid var(--error-border);
  background: var(--error-bg);
  color: var(--error-text);
  font-size: 13px;
  white-space: pre-wrap;
}

.btn {
  appearance: none;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.08);
  color: #fff;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
}

.btn:hover { background: rgba(255,255,255,0.16); }
.btn.active {
  background: var(--accent);
  border-color: var(--accent);
}

.node-mode-wrap {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.check-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.08);
  color: #fff;
  padding: 6px 8px;
  border-radius: 8px;
  font-size: 12px;
  cursor: pointer;
}

.check-pill input[type="checkbox"] {
  width: 14px;
  height: 14px;
  margin: 0;
  accent-color: #60a5fa;
}

.check-pill span {
  font-size: 12px;
}

.select-like-btn {
  appearance: none;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.08);
  color: #fff;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  min-width: 132px;
}
.select-like-btn:hover { background: rgba(255,255,255,0.16); }
.select-like-btn option {
  color: #111827;
  background: #fff;
}

.input-like {
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.08);
  color: #fff;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 13px;
  min-width: 140px;
}

.input-like::placeholder { color: rgba(255,255,255,0.7); }

@media (max-width: 980px) {
  #main { flex-direction: column; gap: 12px; }
  #editor-pane {
    width: 100%;
    min-width: 0;
    height: var(--pane-top);
    min-height: 180px;
  }
  #preview-pane {
    width: 100%;
    min-width: 0;
    flex: 1;
    min-height: 180px;
  }
  #pane-divider {
    display: block;
    width: 100%;
    height: 10px;
    margin: 8px 0;
    cursor: row-resize;
  }
}

#preview-pane.preview-dark .pane-title {
  background: #0f172a;
  color: #e5e7eb;
  border-bottom-color: #334155;
}

#preview-pane.preview-dark .zoom-controls {
  color: #cbd5e1;
}

#preview-pane.preview-dark .btn-light {
  background: #111827;
  color: #e5e7eb;
  border-color: #334155;
}

#preview-pane.preview-dark .btn-light:hover {
  background: #1f2937;
}

#preview-pane.preview-dark #render-wrapper {
  background: #0b1220;
}