* {
  box-sizing: border-box;
}

html {
  background: var(--color-background);
  color: var(--color-text-primary);
  font-family: ui-rounded, "SF Pro Rounded", "SF Pro Display", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.5;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 50% 25%, color-mix(in srgb, var(--color-glow) 11%, transparent), transparent 26rem),
    var(--color-background);
}

button,
textarea {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.skip-link,
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link:focus {
  z-index: 10;
  inset: var(--space-2) auto auto var(--space-2);
  width: auto;
  height: auto;
  clip: auto;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius);
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 4px;
}

.prototype-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - 2rem, 62rem);
  margin: 0 auto;
  padding: var(--space-2) 0;
}

.wordmark {
  color: var(--color-text-primary);
  font-size: 1.15rem;
  font-weight: 800;
  text-decoration: none;
}

.wordmark span,
.text-link {
  color: var(--color-accent);
}

.progress,
.privacy-note,
.task-echo,
.copy-status {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.prototype-shell {
  display: grid;
  min-height: min(44rem, calc(100vh - 12rem));
  place-items: center;
  width: min(100% - 2rem, 42rem);
  margin: 0 auto;
  padding: var(--space-4) 0 var(--space-6);
}

.screen {
  width: 100%;
  text-align: center;
}

.screen[hidden] {
  display: none;
}

.eyebrow {
  margin: var(--space-2) 0 var(--space-1);
  color: var(--color-accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  max-width: 14ch;
  margin: var(--space-1) auto;
  font-size: clamp(2rem, 7vw, 4.5rem);
  letter-spacing: -0.045em;
  line-height: 1.02;
  text-wrap: balance;
}

.lede {
  max-width: 36rem;
  margin: var(--space-2) auto var(--space-4);
  color: var(--color-text-secondary);
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  text-wrap: balance;
}

.button {
  display: inline-flex;
  min-width: 10rem;
  min-height: var(--tap-min);
  align-items: center;
  justify-content: center;
  border: 2px solid transparent;
  border-radius: var(--radius);
  padding: 0.75rem 1.4rem;
  cursor: pointer;
  font-weight: 800;
  transition: transform var(--motion-duration) var(--motion-ease), background var(--motion-duration) var(--motion-ease);
}

.button:hover {
  transform: translateY(-2px);
}

.button--primary {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.button--quiet,
.button--outcome {
  border-color: var(--color-accent);
  background: var(--color-surface);
  color: var(--color-text-primary);
}

.button--small {
  min-width: auto;
  padding-inline: var(--space-2);
}

.button--dev {
  border-color: var(--color-text-secondary);
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 0.8rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

form {
  display: grid;
  gap: var(--space-2);
  max-width: 36rem;
  margin: var(--space-4) auto var(--space-2);
}

textarea {
  width: 100%;
  min-height: 9rem;
  resize: vertical;
  border: 2px solid transparent;
  border-radius: var(--radius);
  padding: var(--space-2);
  background: var(--color-surface);
  color: var(--color-text-primary);
  font-size: 1.15rem;
}

textarea:focus {
  border-color: var(--color-focus);
}

textarea::placeholder {
  color: var(--color-text-secondary);
  opacity: 1;
}

.field-error {
  margin: 0;
  color: var(--color-text-primary);
  font-weight: 700;
}

.sample-chip {
  max-width: 36rem;
  min-height: var(--tap-min);
  border: 0;
  border-radius: 999px;
  padding: 0.7rem var(--space-2);
  background: var(--color-surface-strong);
  color: var(--color-text-primary);
  cursor: pointer;
}

.privacy-note {
  margin-top: var(--space-3);
}

.task-echo {
  max-width: 36rem;
  margin: var(--space-2) auto;
  overflow-wrap: anywhere;
}

.first-step {
  max-width: 28ch;
  margin: var(--space-3) auto;
  font-size: clamp(1.45rem, 4vw, 2.4rem);
  font-weight: 750;
  line-height: 1.2;
  text-wrap: balance;
}

.timer-ring {
  --timer-progress: 360deg;
  display: grid;
  width: min(70vw, 18rem);
  aspect-ratio: 1;
  place-items: center;
  margin: var(--space-3) auto;
  border-radius: 50%;
  background: conic-gradient(var(--color-accent) var(--timer-progress), var(--color-surface-strong) 0);
}

.timer-center {
  display: grid;
  width: calc(100% - 1rem);
  aspect-ratio: 1;
  place-content: center;
  border-radius: 50%;
  background: var(--color-background);
}

.timer-text {
  margin: var(--space-1) 0 0;
  font-size: 2rem;
  font-variant-numeric: tabular-nums;
  font-weight: 800;
}

.timer-step {
  max-width: 34rem;
  margin: var(--space-3) auto;
  font-size: 1.15rem;
  font-weight: 700;
}

.outcome-actions {
  display: grid;
  gap: var(--space-2);
  max-width: 30rem;
  margin: var(--space-4) auto;
}

.button--outcome {
  width: 100%;
  min-height: 4rem;
  font-size: 1.05rem;
}

.completion {
  max-width: 34rem;
  margin: var(--space-4) auto;
  border-radius: var(--radius);
  padding: var(--space-3);
  background: var(--color-surface);
}

.text-link {
  display: inline-flex;
  min-height: var(--tap-min);
  align-items: center;
  font-weight: 800;
}

.ember {
  --ember-size: 5rem;
  position: relative;
  width: var(--ember-size);
  height: var(--ember-size);
  margin-inline: auto;
  border-radius: 48% 52% 46% 54%;
  background: var(--color-ember);
  box-shadow: 0 0 1.5rem color-mix(in srgb, var(--color-glow) 66%, transparent);
  transition: opacity var(--motion-duration) var(--motion-ease), box-shadow var(--motion-duration) var(--motion-ease);
}

.ember::before,
.ember::after {
  position: absolute;
  top: 42%;
  width: calc(var(--ember-size) * 0.09);
  height: calc(var(--ember-size) * 0.09);
  border-radius: 50%;
  background: #2b2420;
  content: "";
}

.ember::before {
  left: 30%;
}

.ember::after {
  right: 30%;
}

.ember span {
  position: absolute;
  bottom: 26%;
  left: 42%;
  width: 16%;
  height: 8%;
  border-bottom: 2px solid #2b2420;
  border-radius: 0 0 50% 50%;
}

.ember--small {
  --ember-size: 3.5rem;
}

.ember--large {
  --ember-size: 7rem;
}

.ember--timer {
  --ember-size: 5rem;
}

.ember[data-ember-state="resting"] {
  filter: saturate(0.2);
  opacity: 0.72;
  box-shadow: 0 0 0.7rem color-mix(in srgb, var(--color-glow) 22%, transparent);
}

.ember[data-ember-state="focus"] {
  animation: ember-pulse 2.4s ease-in-out infinite;
}

.ember[data-ember-state="distracted"] {
  animation: ember-flicker 1.2s ease-in-out 2;
}

.ember[data-ember-state="celebration"] {
  box-shadow: 0 0 3.5rem var(--color-glow);
  transform: scale(1.04);
}

.research-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  width: min(100% - 2rem, 62rem);
  margin: 0 auto var(--space-2);
  border: 1px solid var(--color-surface-strong);
  border-radius: var(--radius);
  padding: var(--space-2);
  background: var(--color-surface);
}

.research-panel p {
  margin: 0;
}

.research-actions {
  display: flex;
  gap: var(--space-1);
}

@keyframes ember-pulse {
  50% { box-shadow: 0 0 2.8rem var(--color-glow); transform: scale(1.035); }
}

@keyframes ember-flicker {
  35% { opacity: 0.55; transform: rotate(-2deg); }
  70% { opacity: 1; transform: rotate(2deg); }
}

@media (max-width: 38rem) {
  .prototype-shell {
    min-height: calc(100vh - 10rem);
    padding-top: var(--space-2);
  }

  .actions,
  .research-panel {
    align-items: stretch;
    flex-direction: column;
  }

  .actions .button {
    width: 100%;
  }

  .research-actions .button {
    flex: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }

  .button:hover {
    transform: none;
  }
}