:root {
  --bg-color: #1e1e1e;
  --panel-bg: #252526;
  --text-color: #d4d4d4;
  --accent: #007acc;
  --border: #3e3e42;
  --header-height: 50px;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
  height: 100vh;
  display: flex;
  flex-direction: column;
}
header {
  height: var(--header-height);
  background: var(--panel-bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
}
.brand {
  font-weight: 700;
  font-size: 1.2rem;
}
.controls input {
  background: #3c3c3c;
  border: 1px solid var(--border);
  color: #fff;
  padding: 4px 8px;
  border-radius: 4px;
}
button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 5px 12px;
  border-radius: 3px;
  cursor: pointer;
  transition: opacity 0.15s ease;
}
button:hover {
  opacity: 0.9;
}
button:disabled {
  background: #555;
  cursor: wait;
}
main {
  flex: 1;
  display: flex;
  overflow: hidden;
}
.panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 10px;
  min-width: 0;
}
.left {
  border-right: 1px solid var(--border);
}
.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}
textarea {
  width: 100%;
  background: #1e1e1e;
  color: #d4d4d4;
  border: 1px solid var(--border);
  padding: 8px;
  font-family: "Consolas", "Courier New", monospace;
  font-size: 14px;
  resize: none;
}
#code-editor {
  flex: 1;
  margin-bottom: 10px;
}
.panel-actions {
  display: flex;
  gap: 8px;
}
#instruction-input {
  flex: 1;
  background: #3c3c3c;
  border: 1px solid var(--border);
  color: #fff;
  padding: 6px;
}
.output-area {
  flex: 1;
  background: #1e1e1e;
  border: 1px solid var(--border);
  padding: 10px;
  overflow-y: auto;
  white-space: pre-wrap;
  font-family: "Consolas", monospace;
  margin-bottom: 10px;
}
.output-controls {
  display: flex;
  gap: 6px;
  align-items: center;
}
.chat-controls {
  display: flex;
  gap: 8px;
  align-items: flex-start;
}
#chat-input {
  flex: 1;
  height: 60px;
}
#btn-send-chat {
  height: 60px;
}
.hidden {
  display: none;
}
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid #ffffff3d;
  border-top: 2px solid #fff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
.error-msg {
  color: #ff6b6b;
  border-left: 3px solid #ff6b6b;
  padding-left: 8px;
  margin: 8px 0;
}
.user-msg {
  color: #85c6ff;
  margin-top: 10px;
  font-weight: 700;
}
.ai-msg {
  color: #cecece;
  margin-bottom: 10px;
}