Spinner

import type { ComponentProps } from "react";

export interface SpinnerProps extends Omit<ComponentProps<"span">, "children"> {
  /** What is loading. Read out by screen readers. */
  label?: string;
}

const dot = "size-(--tui-spinner-size) rounded-full bg-(--tui-spinner-color) [animation:tui-air-breathe_var(--tui-spinner-speed)_ease-in-out_infinite] motion-reduce:[animation:none] motion-reduce:opacity-60";

/** Three dots that swell one after another. Nothing turns. */
export function Spinner({ label = "Loading", className, ...props }: SpinnerProps) {
  return (
    <span {...props} role="img" aria-label={label} data-slot="spinner" className={["inline-flex shrink-0 items-center gap-(--tui-spinner-gap)", className].filter(Boolean).join(" ")}>
      <span className={dot} />
      <span className={`${dot} [animation-delay:calc(var(--tui-spinner-speed)_*_0.16)]`} />
      <span className={`${dot} [animation-delay:calc(var(--tui-spinner-speed)_*_0.32)]`} />
    </span>
  );
}

:root {
  color-scheme: light;
  --tui-bg: #ffffff;
  --tui-fg: #0a0a0a;
  --tui-muted: #f5f5f5;
  --tui-muted-fg: #737373;
  --tui-border: #e5e5e5;
  --tui-primary: #171717;
  --tui-primary-fg: #fafafa;
  --tui-ring: #a3a3a3;
  --tui-success: #16a34a;
  --tui-warning: #d97706;
  --tui-danger: #dc2626;
  --tui-radius: 8px;
  --tui-border-width: 1px;
  --tui-space: 4px;
  --tui-shadow: none;
  --tui-font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --tui-text: 14px;
  --tui-duration: 150ms;

  /* Spinner */
  --tui-spinner-size: 8px;
  --tui-spinner-gap: 5px;
  --tui-spinner-speed: 1.1s;
  --tui-spinner-color: var(--tui-fg);
}

.dark,
[data-theme="dark"] {
  color-scheme: dark;
  --tui-bg: #0a0a0a;
  --tui-fg: #fafafa;
  --tui-muted: #1c1c1c;
  --tui-muted-fg: #a3a3a3;
  --tui-border: #2a2a2a;
  --tui-primary: #fafafa;
  --tui-primary-fg: #171717;
  --tui-ring: #737373;
  --tui-success: #22c55e;
  --tui-warning: #f59e0b;
  --tui-danger: #ef4444;
}

@keyframes tui-air-breathe {
  0%, 60%, 100% { transform: scale(0.6); opacity: 0.35; }
  30% { transform: scale(1); opacity: 1; }
}