.auth-gate-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: authGateFadeIn 0.2s ease;
}
@keyframes authGateFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.auth-gate-card {
  background: var(--bg-primary, #fff);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.18);
  padding: 36px 32px 28px;
  max-width: 400px;
  width: 90%;
  text-align: center;
  position: relative;
  animation: authGateSlideUp 0.25s ease;
}
@keyframes authGateSlideUp {
  from { transform: translateY(30px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.auth-gate-close {
  position: absolute;
  top: 12px;
  right: 14px;
  background: none;
  border: none;
  font-size: 20px;
  color: var(--text-muted, #94a3b8);
  cursor: pointer;
  line-height: 1;
  padding: 4px;
}
.auth-gate-close:hover {
  color: var(--text-primary, #1a2233);
}
.auth-gate-icon {
  font-size: 40px;
  margin-bottom: 12px;
}
.auth-gate-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary, #1a2233);
  margin: 0 0 8px;
}
.auth-gate-desc {
  font-size: 14px;
  color: var(--text-secondary, #64748b);
  margin: 0 0 24px;
  line-height: 1.5;
}
.auth-gate-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.auth-gate-btn {
  display: block;
  width: 100%;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
}
.auth-gate-btn-primary {
  background: var(--accent, #2563eb);
  color: #fff;
}
.auth-gate-btn-primary:hover {
  background: var(--accent-hover, #1d4ed8);
}
.auth-gate-btn-secondary {
  background: var(--bg-secondary, #f1f5f9);
  color: var(--text-primary, #1a2233);
  border: 1px solid var(--border-color, #e2e8f0);
}
.auth-gate-btn-secondary:hover {
  background: var(--bg-tertiary, #e2e8f0);
}
.auth-gate-shared {
  margin-top: 16px;
  font-size: 11px;
  color: var(--text-muted, #94a3b8);
}