* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-dark);
  -webkit-font-smoothing: antialiased;
}
button {
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  font-family: inherit;
}
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border-light);
  border-top-color: var(--text-dark);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 40px auto;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Toast Notification */
.toast-notification {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(0, 0, 0, 0.85);
  color: white;
  padding: 12px 24px;
  border-radius: 24px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.toast-notification.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}