/* MixOS 课程 — 在线编译/烧录面板 */
.lab-card {
  border: 1px solid #0d6b62;
  background: linear-gradient(180deg, #f0faf8 0%, var(--card) 40%);
}

.lab-host {
  margin-top: 0.75rem;
}

.lab-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.75rem;
}

.lab-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  border-radius: 8px;
  padding: 0.45rem 0.85rem;
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.lab-btn:hover:not(:disabled) {
  border-color: #0d6b62;
  background: #f0faf8;
}

.lab-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.lab-btn-primary {
  background: #0969da;
  border-color: #0969da;
  color: #fff;
}

.lab-btn-primary:hover:not(:disabled) {
  background: #0550ae;
  border-color: #0550ae;
  color: #fff;
}

.lab-btn-accent {
  background: #0d6b62;
  border-color: #0d6b62;
  color: #fff;
}

.lab-btn-accent:hover:not(:disabled) {
  background: #0a554f;
  border-color: #0a554f;
  color: #fff;
}

.lab-btn-link {
  border-style: dashed;
}

.lab-status {
  font-size: 0.85rem;
  color: var(--muted);
  margin-left: 0.25rem;
}

.lab-status-ok { color: var(--ok); }
.lab-status-warn { color: var(--pending); }

.lab-sources-host {
  max-height: 320px;
  overflow: auto;
  border: 1px solid #30363d;
  border-radius: 8px;
  background: #0d1117;
  margin-bottom: 0.75rem;
}

.lab-sources-single {
  padding: 0.55rem 0.65rem;
}

.lab-active-path {
  margin: 0 0 0.4rem;
  font-size: 0.78rem;
  font-family: ui-monospace, Consolas, monospace;
  color: #7ee787;
}

.lab-file {
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid #30363d;
}

.lab-file:last-child {
  border-bottom: none;
}

.lab-file-path {
  margin: 0 0 0.35rem;
  font-size: 0.82rem;
  font-family: ui-monospace, Consolas, monospace;
  color: #7ee787;
}

.lab-code {
  margin: 0;
  padding: 0.75rem 0.85rem;
  background: #161b22;
  color: #e6edf3;
  border: 1px solid #30363d;
  border-radius: 6px;
  font-family: Consolas, "Cascadia Code", "Microsoft YaHei", "PingFang SC", monospace;
  font-size: 0.82rem;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre;
  tab-size: 2;
}

textarea.lab-code-editor {
  display: block;
  width: 100%;
  min-height: 14rem;
  box-sizing: border-box;
  resize: vertical;
  outline: none;
  white-space: pre;
  overflow: auto;
  tab-size: 2;
  cursor: text;
}

textarea.lab-code-editor:focus {
  border-color: #2f81f7;
  box-shadow: 0 0 0 1px #2f81f7 inset;
}

textarea.lab-code-editor.is-readonly {
  opacity: 0.85;
  cursor: default;
}

.lab-log {
  margin: 0;
  min-height: 5rem;
  max-height: 12rem;
  overflow: auto;
  padding: 0.65rem 0.85rem;
  background: #f1f5f9;
  color: #0f172a;
  border-radius: 8px;
  font-size: 0.78rem;
  line-height: 1.45;
  white-space: pre-wrap;
}

.lab-muted {
  margin: 0;
  padding: 0.75rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.lab-fallback {
  margin-top: 1rem;
  font-size: 0.9rem;
}

.lab-fallback summary {
  cursor: pointer;
  color: var(--muted);
}