:root {
  --bg-color: #1e1e1e;
  --panel-bg: #252526;
  --border-color: #3e3e42;
  --text-color: #d4d4d4;
  --text-muted: #858585;
  --accent-color: #007acc;
  --accent-hover: #005a9e;
  --success-color: #4ec9b0;
  --error-color: #f48771;
  --warning-color: #dcdcaa;
  --editor-bg: #1e1e1e;
  --output-bg: #ffffff;
  --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-color);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 20px;
  width: 100%;
  flex: 1;
  display: flex;
  flex-direction: column;
}

header {
  text-align: center;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 8px;
  color: var(--accent-color);
}

.subtitle {
  color: var(--text-muted);
  font-size: 1rem;
}

.version-info {
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--success-color);
  font-family: var(--font-mono);
}

.main-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  flex: 1;
  min-height: 0;
}

@media (max-width: 1024px) {
  .main-content {
    grid-template-columns: 1fr;
  }
}

.editor-panel,
.output-panel {
  background-color: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background-color: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--border-color);
}

.panel-header h2,
.panel-header h3 {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.btn {
  padding: 6px 14px;
  border: none;
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--accent-color);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--accent-hover);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-color);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: var(--text-muted);
}

.btn-small {
  padding: 4px 10px;
  font-size: 0.75rem;
  background-color: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}

.btn-small:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

.btn-icon {
  font-size: 0.7rem;
}

.select-examples {
  padding: 6px 10px;
  background-color: var(--editor-bg);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.85rem;
  cursor: pointer;
}

.select-examples:focus {
  outline: none;
  border-color: var(--accent-color);
}

.input-filename {
  padding: 6px 10px;
  background-color: var(--editor-bg);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.85rem;
  min-width: 160px;
  max-width: 220px;
}

.input-filename:focus {
  outline: none;
  border-color: var(--accent-color);
}

.input-filename::placeholder {
  color: var(--text-muted);
}

.editor {
  flex: 1;
  min-height: 300px;
  background-color: var(--editor-bg);
  color: var(--text-color);
  border: none;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
  resize: none;
  tab-size: 2;
}

.editor:focus {
  outline: none;
}

.editor::placeholder {
  color: var(--text-muted);
}

.editor-footer {
  display: flex;
  justify-content: space-between;
  padding: 8px 16px;
  background-color: var(--accent-color);
  color: white;
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

.output {
  flex: 1;
  min-height: 300px;
  background-color: var(--output-bg);
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.output svg {
  max-width: 100%;
  max-height: 100%;
  display: block;
}

.output img,
.output-image {
  max-width: 100%;
  max-height: 100%;
  display: block;
  object-fit: contain;
}

.output embed,
.output iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.placeholder {
  text-align: center;
  color: #666;
  padding: 40px;
}

.placeholder p {
  font-size: 1.1rem;
}

.placeholder strong {
  color: #333;
  font-weight: 600;
}

.placeholder-note {
  font-size: 0.9rem;
  margin-top: 10px;
  color: #666;
}

.placeholder-hint {
  font-size: 0.85rem;
  margin-top: 8px;
  color: #888;
}

.console-panel {
  border-top: 1px solid var(--border-color);
  max-height: 150px;
  display: flex;
  flex-direction: column;
}

.console-panel .panel-header {
  padding: 8px 16px;
}

.console-output {
  flex: 1;
  overflow: auto;
  padding: 12px 16px;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.4;
  white-space: pre-wrap;
  word-break: break-word;
}

.console-output:empty::before {
  content: "No output";
  color: var(--text-muted);
  font-style: italic;
}

.console-output .error {
  color: var(--error-color);
}

.console-output .success {
  color: var(--success-color);
}

.console-output .info {
  color: var(--warning-color);
}

.console-output .warning {
  color: var(--error-color);
  font-weight: 500;
}

footer {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

footer a {
  color: var(--accent-color);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(30, 30, 30, 0.95);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

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

.loading-text {
  margin-top: 20px;
  color: var(--text-color);
  font-size: 1rem;
}

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

.error-message {
  color: var(--error-color);
  padding: 20px;
  text-align: center;
}