:root {
  --ink: #12171f;
  --ink-soft: #3a4556;
  --mist-0: #eef2f7;
  --mist-1: #d8e0ea;
  --mist-2: #c3cedc;
  --blank: #f4f6f9;
  --signal: #ff3d2e;
  --signal-deep: #d42118;
  --ok: #0f8a5f;
  --warn: #b45309;
  --panel: rgba(255, 255, 255, 0.42);
  --font-display: "Syne", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-pop: cubic-bezier(0.34, 1.56, 0.64, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  height: 100%;
}

body {
  color: var(--ink);
  font-family: var(--font-display);
  background: var(--mist-1);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  touch-action: manipulation;
}

.stage {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  gap: 1rem;
  min-height: 100dvh;
  padding: max(1.25rem, env(safe-area-inset-top))
    max(1.25rem, env(safe-area-inset-right))
    max(1.25rem, env(safe-area-inset-bottom))
    max(1.25rem, env(safe-area-inset-left));
  overflow: hidden;
}

.atmosphere {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 90% 70% at 50% -10%, #ffffff 0%, transparent 55%),
    radial-gradient(ellipse 60% 50% at 100% 100%, #b7c6d8 0%, transparent 50%),
    radial-gradient(ellipse 55% 45% at 0% 80%, #cad5e4 0%, transparent 45%),
    linear-gradient(165deg, var(--mist-0), var(--mist-1) 45%, var(--mist-2));
  transition: opacity 320ms var(--ease-out), filter 320ms var(--ease-out);
}

.brand-block {
  text-align: center;
  animation: brand-in 700ms var(--ease-out) both;
}

.brand {
  margin: 0;
  font-size: clamp(2.4rem, 9vw, 4.75rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 0.92;
  text-transform: uppercase;
}

.tagline {
  margin: 0.55rem 0 0;
  color: var(--ink-soft);
  font-size: clamp(0.95rem, 2.4vw, 1.125rem);
  font-weight: 600;
  letter-spacing: 0.01em;
}

.hud {
  display: flex;
  justify-content: center;
  gap: clamp(1.5rem, 6vw, 3rem);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.hud-muted,
.hud-unit {
  opacity: 0.55;
  font-weight: 400;
  text-transform: none;
}

.playfield {
  position: relative;
  display: grid;
  place-items: center;
  width: min(100%, 42rem);
  min-height: min(58dvh, 28rem);
  margin: 0 auto;
  padding: 1.5rem;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

.playfield:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 6px;
}

.prompt {
  max-width: 16rem;
  font-size: clamp(1.35rem, 4.5vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  transition: opacity 180ms var(--ease-out), transform 180ms var(--ease-out);
}

.target {
  width: min(58vw, 17rem);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 28%, #ff8a78 0%, transparent 42%),
    linear-gradient(145deg, var(--signal), var(--signal-deep));
  box-shadow: 0 18px 40px rgba(212, 33, 24, 0.28);
  animation: target-in 420ms var(--ease-pop) both;
  will-change: transform, opacity;
}

.result {
  display: grid;
  justify-items: center;
  gap: 0.35rem;
  animation: result-in 480ms var(--ease-out) both;
}

.time {
  font-family: var(--font-mono);
  font-size: clamp(3.5rem, 16vw, 6.5rem);
  font-weight: 600;
  letter-spacing: -0.06em;
  line-height: 0.9;
  font-variant-numeric: tabular-nums;
}

.time-unit {
  margin-top: -0.2rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.result-note {
  margin-top: 0.75rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.footer {
  text-align: center;
}

.hint {
  margin: 0 auto;
  max-width: 28rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
}

/* State: waiting — blank screen */
.state-waiting .atmosphere {
  opacity: 0;
}

.state-waiting .brand-block,
.state-waiting .hud,
.state-waiting .footer {
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms var(--ease-out);
}

.state-waiting {
  background: var(--blank);
}

.state-waiting .playfield {
  min-height: 100%;
}

.state-waiting .prompt {
  opacity: 0;
  transform: scale(0.98);
}

/* State: go */
.state-go .prompt {
  display: none;
}

.state-go .brand-block,
.state-go .hud,
.state-go .footer {
  opacity: 0.18;
}

/* State: result / summary / too-soon */
.state-result .prompt,
.state-summary .prompt,
.state-too-soon .prompt {
  display: none;
}

.state-too-soon .result-note {
  color: var(--warn);
}

.state-result .result-note.is-best {
  color: var(--ok);
}

.state-summary .time {
  font-size: clamp(3rem, 12vw, 5.25rem);
}

@keyframes brand-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes target-in {
  from {
    opacity: 0;
    transform: scale(0.42);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes result-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}