html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

body {
  display: flex;
  flex-direction: column;
  background: #1e1e1e;
  color: #d4d4d4;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.editor-container, .editor-layout {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.editor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background: #252526;
  border-bottom: 1px solid #3e3e42;
  gap: 1rem;
}

.header-left .title { color: #fff; }
.header-center { flex: 1; display: flex; justify-content: center; max-width: 300px; }
.header-center .select { width: 100%; }
.header-center select { background: #3c3c3c; color: #d4d4d4; border: 1px solid #3e3e42; width: 100%; }
.header-right { display: flex; gap: 0.5rem; }

.editor-panels {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
}

.editor-panel {
  display: flex;
  flex-direction: column;
  border-right: 1px solid #3e3e42;
  overflow: hidden;
}

.editor-panel:last-child { border-right: none; }

.panel-header {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: #2d2d30;
  border-bottom: 1px solid #3e3e42;
  font-size: 0.875rem;
}

.panel-title { color: #cccccc; }
.panel-hint { color: #858585; font-size: 0.75rem; }

.panel-content {
  flex: 1;
  overflow: hidden;
  background: #1e1e1e;
  position: relative;
}

.panel-content textarea {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: none;
  background: #1e1e1e;
  color: #d4d4d4;
  font-family: monospace;
  font-size: 14px;
  line-height: 1.6;
  padding: 1rem;
  resize: none;
  outline: none;
  box-sizing: border-box;
}

.output-panel {
  padding: 1rem;
  font-family: monospace;
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  color: #d4d4d4;
  overflow-y: auto;
}

.editor-footer {
  background: #252526;
  border-top: 1px solid #3e3e42;
  padding: 0.5rem 1rem;
}

.example-section { color: #cccccc; }
.example-section summary { cursor: pointer; padding: 0.5rem; }

.doc-content {
  background: #1e1e1e;
  border: 1px solid #3e3e42;
  border-radius: 6px;
  padding: 1.5rem;
  margin-top: 0.5rem;
  max-height: 400px;
  overflow-y: auto;
}

.doc-title { color: #4ec9b0; text-align: center; margin-bottom: 1rem; }
.doc-section { color: #569cd6; font-weight: bold; margin: 1.5rem 0 0.5rem; }
.doc-item { margin-left: 1rem; margin-bottom: 0.5rem; }
.doc-item strong { color: #ce9178; }

@media (max-width: 768px) {
  .editor-panels { grid-template-columns: 1fr; grid-template-rows: 1fr 1fr; }
}