* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f7f7fb;
  color: #1a1a2e;
}

.app-header {
  padding: 1.5rem 2rem 1rem;
  text-align: center;
}

.app-header h1 {
  margin: 0 0 0.25rem;
}

.app-header p {
  margin: 0;
  color: #666;
  font-size: 0.95rem;
}

.app-main {
  display: flex;
  gap: 1.5rem;
  padding: 1rem 3vw 2vw;
  width: 100%;
  margin: 0 auto;
}

.pane {
  display: flex;
  flex-direction: column;
  background: #fff;
  border-radius: 10px;
  padding: 1rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.input-pane {
  flex: 1;
}

.output-pane {
  flex: 1.4;
}

.pane label {
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

#code-input {
  flex: 1;
  min-height: 260px;
  font-family: "Consolas", "Courier New", monospace;
  font-size: 0.9rem;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 6px;
  resize: vertical;
}

.controls {
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.controls select,
.controls button {
  padding: 0.6rem;
  border-radius: 6px;
  border: 1px solid #ddd;
  font-size: 0.9rem;
}

.controls button {
  background: #16213e;
  color: #fff;
  border: none;
  cursor: pointer;
  font-weight: 600;
}

.controls button:hover {
  background: #0f172a;
}

.output-box {
  flex: 1;
  min-height: 260px;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 0.75rem;
  overflow-y: auto;
  white-space: pre-wrap;
  font-size: 0.92rem;
  line-height: 1.5;
}

.output-box .placeholder {
  color: #999;
}

/* Styling for the rendered Markdown explanation */
.output-box h1,
.output-box h2,
.output-box h3 {
  margin: 0.9em 0 0.4em;
  font-size: 1.05rem;
  color: #16213e;
}

.output-box h1:first-child,
.output-box h2:first-child,
.output-box h3:first-child {
  margin-top: 0;
}

.output-box p {
  margin: 0 0 0.75em;
}

.output-box ul,
.output-box ol {
  margin: 0 0 0.75em;
  padding-left: 1.3em;
}

.output-box li {
  margin-bottom: 0.3em;
}

.output-box strong {
  color: #16213e;
}

.output-box code {
  background: #f0f0f5;
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-family: "Consolas", "Courier New", monospace;
  font-size: 0.88em;
}

.output-box pre {
  background: #16213e;
  color: #f5f5f5;
  padding: 0.75em;
  border-radius: 6px;
  overflow-x: auto;
  margin: 0 0 0.75em;
}

.output-box pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.output-box blockquote {
  border-left: 3px solid #ddd;
  margin: 0 0 0.75em;
  padding-left: 0.8em;
  color: #555;
}

/* Mobile: stack panes instead of side-by-side */
@media (max-width: 720px) {
  .app-main {
    flex-direction: column;
    padding: 1rem;
  }
}