[data-boot-root] {
  align-items: center;
  background: var(--os-canvas);
  color: var(--os-ink);
  display: flex;
  inset: 0;
  justify-content: center;
  min-height: 100vh;
  padding: 32px;
  position: fixed;
  z-index: 1000;
}

[data-boot-root][hidden] {
  display: none;
}

[data-boot-panel] {
  background: var(--os-surface);
  border: 1px solid var(--os-surface-highlight);
  box-shadow: 12px 12px 0 var(--os-shadow);
  max-width: 720px;
  padding: clamp(24px, 5vw, 56px);
  width: 100%;
  z-index: 1;
}

[data-boot-dither] {
  display: grid;
  grid-template-columns: repeat(11, 1fr);
  grid-template-rows: repeat(7, 1fr);
  inset: 0;
  opacity: 0;
  pointer-events: none;
  position: absolute;
  transition: opacity 600ms steps(6, end);
  z-index: 2;
}

[data-boot-dither] span:nth-child(odd) {
  background: var(--os-accent-bright);
}

[data-boot-root][data-phase='exiting'] [data-boot-dither] {
  opacity: 0.88;
}

[data-boot-root][data-phase='exiting'] [data-boot-panel] {
  opacity: 0.35;
  transform: translate(8px, 8px);
  transition: opacity 600ms steps(3, end), transform 600ms steps(3, end);
}

[data-boot-header] {
  border-bottom: 1px solid var(--os-surface-highlight);
  display: flex;
  font-family: var(--mono);
  font-size: 12px;
  justify-content: space-between;
  padding-bottom: 12px;
}

[data-boot-title] {
  font-size: clamp(32px, 5vw, 54px);
  font-weight: 400;
  line-height: 1.05;
  margin: 32px 0;
}

[data-boot-status] {
  display: grid;
  font-family: var(--mono);
  gap: 8px;
}

[data-boot-step] {
  display: grid;
  grid-template-columns: 3ch 1fr;
  opacity: 0.45;
  transition: opacity 150ms steps(2, end), transform 150ms steps(2, end);
}

[data-boot-step][data-status='ok'] {
  opacity: 1;
  transform: translateX(4px);
}

[data-boot-result] {
  float: right;
}

[data-boot-progress] {
  display: grid;
  gap: 4px;
  grid-template-columns: repeat(6, 1fr);
  height: 12px;
  margin: 28px 0;
}

[data-boot-progress-step] {
  border: 1px solid var(--os-surface-highlight);
}

[data-boot-progress-step][data-status='ok'] {
  background: var(--os-accent);
}

[data-boot-skip] {
  background: var(--os-accent);
  border: 1px solid var(--os-accent-bright);
  border-radius: 0;
  color: var(--os-canvas);
  cursor: pointer;
  font-family: var(--mono);
  min-height: 44px;
  padding: 10px 16px;
}

[data-boot-skip]:focus-visible {
  outline: var(--os-focus-width) solid var(--os-accent-bright);
  outline-offset: 4px;
}

@media (max-width: 560px) {
  [data-boot-root] { padding: 16px; }
  [data-boot-panel] { box-shadow: 6px 6px 0 var(--os-shadow); }
  [data-boot-header] { gap: 16px; }
  [data-boot-title] { font-size: 32px; }
}

@media (prefers-reduced-motion: reduce) {
  [data-boot-step],
  [data-boot-dither],
  [data-boot-panel] { transition: none; }
}