:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-strong: #273449;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #a78bfa;
  --accent-ink: #1e1b4b;
  --border: rgba(148, 163, 184, 0.22);
  --radius: 12px;
  --shadow: 0 12px 32px rgba(2, 6, 23, 0.45);
  --speed: 200ms;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: dark;
}

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

html {
  height: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background: radial-gradient(120% 70% at 50% 0%, #1b2440 0%, var(--bg) 60%) var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.4;
}

button {
  font: inherit;
}

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

/* Header */
.topbar {
  flex: none;
  padding: 10px 16px 6px;
}

.topbar-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.brand {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand-mark {
  width: 30px;
  height: 30px;
  flex: none;
  filter: drop-shadow(0 2px 6px rgba(167, 139, 250, 0.45));
}

.actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn {
  min-width: 40px;
  min-height: 40px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-weight: 650;
  font-size: 0.95rem;
  white-space: nowrap;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(2, 6, 23, 0.25);
  transition: background-color var(--speed) ease, border-color var(--speed) ease, transform 150ms ease, opacity var(--speed) ease;
  -webkit-tap-highlight-color: transparent;
}

.btn:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--surface-strong);
}

.btn:active:not(:disabled) {
  transform: translateY(1px) scale(0.98);
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.45;
  cursor: default;
}

.btn-primary {
  background: var(--accent);
  border-color: transparent;
  color: var(--accent-ink);
}

.btn-primary:hover:not(:disabled) {
  background: #b9a3fc;
  border-color: transparent;
}

.btn-icon {
  width: 40px;
  padding: 0;
}

.btn-lang {
  padding: 0 10px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.btn-wide {
  width: 100%;
  min-height: 46px;
  font-size: 1.05rem;
}

.icon {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-play {
  fill: currentColor;
}

.icon-play,
.icon-sound-off,
#btn-pause[data-paused="true"] .icon-pause,
#btn-sound[data-muted="true"] .icon-sound-on {
  display: none;
}

#btn-pause[data-paused="true"] .icon-play,
#btn-sound[data-muted="true"] .icon-sound-off {
  display: block;
}

/* Play area: the largest 9:16 box that fits between header and footer */
.arena {
  flex: 1 1 0;
  min-height: 320px;
  padding: 6px 16px;
  display: grid;
  place-items: center;
  container-type: size;
}

.play-area {
  position: relative;
  width: min(100cqw, 100cqh * 9 / 16);
  aspect-ratio: 9 / 16;
  border-radius: var(--radius);
  overflow: hidden;
  background: #6f9cf5;
  box-shadow: var(--shadow), 0 0 0 1px rgba(167, 139, 250, 0.25);
  container-type: inline-size;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
  cursor: pointer;
}

.play-area canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* Overlays */
.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 6cqw;
  text-align: center;
  opacity: 0;
  visibility: hidden;
}

.overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

/* Transitions start only after the first sync (html.animate), so nothing fades on page load. */
.animate .overlay {
  transition: opacity var(--speed) ease, visibility 0s linear var(--speed);
}

.animate .overlay.is-visible {
  transition: opacity var(--speed) ease, visibility 0s;
}

.overlay p {
  margin: 0;
}

.overlay-ready {
  justify-content: space-between;
  padding: 13cqw 6cqw 31cqw;
  color: #ffffff;
  text-shadow: 0 2px 10px rgba(30, 27, 75, 0.55);
  pointer-events: none;
}

.ready-title {
  font-size: clamp(32px, 15cqw, 64px);
  font-weight: 850;
  letter-spacing: 0.04em;
  line-height: 1.05;
}

.overlay .ready-tagline {
  margin-top: 1.5cqw;
  font-size: clamp(13px, 4.2cqw, 18px);
  font-weight: 600;
  opacity: 0.95;
}

.ready-bottom {
  display: grid;
  gap: 2.5cqw;
  justify-items: center;
}

.ready-cta {
  padding: 2.4cqw 5cqw;
  border-radius: 999px;
  background: rgba(30, 27, 75, 0.55);
  font-size: clamp(14px, 4.8cqw, 20px);
  font-weight: 750;
  text-shadow: none;
  animation: breathe 1.8s ease-in-out infinite;
}

.ready-keys {
  font-size: clamp(12px, 3.5cqw, 15px);
  font-weight: 600;
}

.ready-best {
  font-size: clamp(13px, 4cqw, 17px);
  font-weight: 650;
}

.ready-best strong {
  color: #ede9fe;
  font-weight: 850;
}

.overlay-card {
  background: rgba(15, 23, 42, 0.35);
}

.card {
  width: min(100%, 320px);
  padding: 20px 18px 16px;
  display: grid;
  gap: 12px;
  border-radius: var(--radius);
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(167, 139, 250, 0.35);
  box-shadow: var(--shadow);
  transform: translateY(10px) scale(0.97);
  cursor: default;
}

.animate .card {
  transition: transform 250ms ease;
}

.overlay.is-visible .card {
  transform: none;
}

.card h2 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.hint {
  color: var(--muted);
  font-size: 0.85rem;
}

.medal-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 12px;
  border-radius: var(--radius);
  background: var(--surface);
  text-align: left;
}

.medal {
  width: 58px;
  height: 58px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: rgba(30, 27, 75, 0.45);
  box-shadow: inset 0 0 0 4px rgba(255, 255, 255, 0.28), inset 0 -6px 10px rgba(0, 0, 0, 0.18), 0 6px 14px rgba(2, 6, 23, 0.4);
}

.medal svg {
  width: 30px;
  height: 30px;
  fill: currentColor;
}

.medal--gold {
  background: radial-gradient(circle at 35% 30%, #fff6c9 0%, #f5c542 45%, #b7791f 100%);
}

.medal--silver {
  background: radial-gradient(circle at 35% 30%, #ffffff 0%, #cbd5e1 45%, #64748b 100%);
}

.medal--bronze {
  background: radial-gradient(circle at 35% 30%, #ffe1c2 0%, #d98a4e 45%, #8a4b1f 100%);
}

.medal--none {
  background: transparent;
  border: 2px dashed rgba(148, 163, 184, 0.5);
  box-shadow: none;
  color: rgba(148, 163, 184, 0.55);
}

.medal-name {
  font-weight: 750;
}

.medal-hint {
  color: var(--muted);
  font-size: 0.85rem;
}

.stats {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.stat {
  padding: 8px;
  border-radius: var(--radius);
  background: var(--surface);
}

.stat dt {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.stat dd {
  margin: 0;
  font-size: 1.7rem;
  font-weight: 850;
  font-variant-numeric: tabular-nums;
}

.new-best {
  justify-self: center;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(167, 139, 250, 0.18);
  color: #ddd6fe;
  font-weight: 750;
}

.new-best[hidden] {
  display: none;
}

/* Footer */
.footer {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 16px 6px;
  color: var(--muted);
  font-size: 0.85rem;
}

.footer a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
  border-radius: 6px;
}

.footer a:hover {
  text-decoration: underline;
}

.footer a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@keyframes breathe {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.04);
  }
}

@media (max-width: 420px) {
  .icon-new {
    display: none;
  }

  .brand {
    font-size: 1.15rem;
    gap: 6px;
  }

  .brand-mark {
    width: 26px;
    height: 26px;
  }

  .btn {
    padding: 0 12px;
  }

  .btn-icon {
    padding: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 0ms !important;
    transition-delay: 0ms !important;
  }
}