:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --secondary: #6366f1;
  --text: #1f2937;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --border: #e2e8f0;
  --code-bg: #1e1e1e;
  --success: #22c55e;
  --error: #ef4444;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

header {
  background: var(--primary);
  color: white;
  padding: 1.5rem;
  text-align: center;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.split-container {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}

.info-pane, .editor-pane {
  flex: 1;
  min-width: 300px;
  background: var(--card-bg);
  padding: 1rem;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
}

.form-box {
  margin-bottom: 1rem;
}

.form-box label {
  font-weight: 600;
  display: block;
  margin-bottom: 0.5rem;
  color: var(--primary);
}

.form-box input, .form-box textarea, .form-box select {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: var(--bg);
  font-size: 0.95rem;
}

textarea {
  resize: vertical;
}

.editor-header {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 0.5rem;
}

.editor-container {
  position: relative;
}

.code-editor {
  font-family: 'JetBrains Mono', monospace;
  background: var(--code-bg);
  color: #fff;
  padding: 1rem;
  border-radius: 0.5rem;
  font-size: 0.9rem;
  width: 100%;
  min-height: 300px;
  border: none;
  resize: vertical;
}

.copy-button {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: rgba(255,255,255,0.1);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-size: 0.8rem;
  border: none;
  cursor: pointer;
}

.copy-button:hover {
  background: rgba(255,255,255,0.2);
}

.extraction-controls {
  margin-top: 1rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.extract-box {
  flex: 1;
}

.comparison-fieldset {
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1rem;
}

.control-buttons, .nav-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

button {
  background: var(--primary);
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

button:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

button:active {
  transform: translateY(0);
}

#saveQuestion {
  background-color: var(--success);
}

#saveQuestion:hover {
  background-color: #16a34a;
}

select:disabled {
  background-color: #f3f4f6;
  cursor: not-allowed;
}

option:disabled {
  color: #9ca3af;
  font-style: italic;
}

.hidden {
  display: none;
}

.generated-content {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}

.problem-section, .code-editor-section {
  background: var(--card-bg);
  border-radius: 0.5rem;
  padding: 1.5rem;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
}

.problem-section h2, .code-editor-section h2 {
  color: var(--primary);
}

.advanced-template-section {
  margin-top: 2rem;
  background: var(--card-bg);
  border-radius: 0.5rem;
  padding: 1rem;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
}

.advanced-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.25rem;
  background: var(--bg);
}

.advanced-header:hover {
  background: var(--border);
}

.advanced-content {
  margin-top: 1rem;
  display: none;
}

.advanced-content.expanded {
  display: block;
}

.template-controls {
  display: flex;
  gap: 1rem;
  margin-top: 0.5rem;
}

.template-editor {
  font-family: 'JetBrains Mono', monospace;
  width: 100%;
  min-height: 250px;
  background: var(--code-bg);
  color: white;
  padding: 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  resize: vertical;
}

.template-note {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text);
}

.sync-status {
  font-size: 0.8rem;
  color: var(--text);
}

.sync-active {
  color: var(--success);
}

.sync-disabled {
  color: var(--error);
}

@media(min-width: 768px) {
  .generated-content {
    grid-template-columns: 1fr 1fr;
  }
}