/**
 * StackPrompt - 認証ゲート用スタイル（未接続・セッション切れ）
 */
.stackprompt-auth-gate-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99999;
}
.stackprompt-auth-gate-overlay[hidden] {
  display: none;
}
.stackprompt-auth-gate-box {
  background: var(--ide-panel, #161b22);
  border: 1px solid var(--ide-border, #30363d);
  border-radius: 12px;
  padding: 2rem;
  max-width: 400px;
  text-align: center;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}
.stackprompt-auth-gate-title {
  margin: 0 0 1rem 0;
  font-size: 1.25rem;
  color: var(--ide-text, #e6edf3);
}
.stackprompt-auth-gate-text {
  margin: 0 0 1.5rem 0;
  color: var(--ide-muted, #8b949e);
  font-size: 1rem;
}
.stackprompt-auth-gate-btn {
  padding: 0.6rem 1.25rem;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: var(--ide-accent, #58a6ff);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
}
.stackprompt-auth-gate-btn:hover {
  background: #79b8ff;
}