:root {
  --bg: #f5f5f2;
  --panel: #ffffff;
  --text: #1c1c1c;
  --muted: #6c7685;
  --line: #c9cfd9;
  --accent: #2b6cb0;
  --bad: #b83232;
  --shadow: rgba(0,0,0,0.08);
}
body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
}
button {
  background: #f0f3f7;
  color: var(--text);
  border: 1px solid var(--line);
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
}
button:hover { border-color: #9fb1c7; }
button.primary { background: #dbeafe; border-color: #93c5fd; }
button.danger { background: #fde2e2; border-color: #f5b7b7; }
button.view-btn.active { background: #e6f0ff; border-color: #93c5fd; }
textarea {
  flex: 1;
  width: 100%;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--text);
  padding: 10px;
  font-family: "IBM Plex Mono", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 12px;
  line-height: 1.35;
  resize: none;
}
.hidden { display: none !important; }