:root {
  color-scheme: dark;
  --background: #10110f;
  --surface: #181a17;
  --surface-soft: #20231f;
  --line: #343a32;
  --text: #f1f5ec;
  --muted: #aab3a2;
  --green: #18b960;
  --green-bright: #b7f20f;
  --aqua: #75d8ff;
  --blue: #4f9cff;
  --violet: #b9a9eb;
  --gray-token: #bfc0c2;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 16% 18%, rgba(24, 185, 96, 0.14), transparent 26%),
    radial-gradient(circle at 84% 72%, rgba(117, 216, 255, 0.08), transparent 24%),
    var(--background);
  color: var(--text);
  font-family: Arial, sans-serif;
}

button {
  font: inherit;
}

.game {
  min-height: 100vh;
  display: grid;
  grid-template-rows: 138px 66px minmax(360px, 1fr) auto;
  justify-items: center;
  gap: 10px;
  padding: 28px 22px 34px;
}

.voice-panel {
  width: min(620px, 100%);
  height: 132px;
  display: grid;
  place-items: center;
}

.voice-line {
  width: min(520px, 82vw);
  height: 120px;
  overflow: visible;
}

.voice-path,
.voice-glow {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.voice-glow {
  stroke: rgba(24, 185, 96, 0.28);
  stroke-width: 12;
  opacity: 0;
}

.voice-path {
  stroke: var(--green);
  stroke-width: 7;
  filter: drop-shadow(0 0 12px rgba(24, 185, 96, 0.3));
  transition: d 180ms ease;
}

.voice-line.is-speaking .voice-glow {
  opacity: 1;
  animation: voiceGlow 520ms ease-in-out infinite alternate;
}

.start-button {
  min-width: 150px;
  height: 54px;
  border: 0;
  border-radius: 8px;
  background: linear-gradient(180deg, #22d86e, var(--green));
  color: #07130c;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0;
  box-shadow:
    0 14px 30px rgba(24, 185, 96, 0.28),
    inset 0 -4px 0 rgba(0, 0, 0, 0.16);
}

.start-button:active {
  transform: translateY(2px);
  box-shadow:
    0 8px 18px rgba(24, 185, 96, 0.22),
    inset 0 -2px 0 rgba(0, 0, 0, 0.18);
}

.start-button:focus-visible,
.token:focus-visible {
  outline: 4px solid rgba(117, 216, 255, 0.28);
  outline-offset: 4px;
}

.activity-stage {
  width: min(860px, 100%);
  min-height: 380px;
  display: grid;
  grid-template-rows: 145px 160px;
  align-content: center;
  gap: 30px;
  border: 0;
  background: transparent;
  box-shadow: none;
}

.debug-panel {
  width: min(860px, 100%);
  display: grid;
  gap: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(24, 26, 23, 0.82);
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.24);
  padding: 14px;
}

.debug-label,
.status-text {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.subtitle-box {
  min-height: 46px;
  display: flex;
  align-items: center;
  margin-top: 7px;
  padding: 12px 14px;
  border: 1px solid #293028;
  border-radius: 8px;
  background: #0d0f0d;
  color: var(--text);
  line-height: 1.35;
}

.status-text {
  margin-top: 8px;
  text-transform: none;
  font-weight: 600;
}

.settings-panel {
  display: grid;
  gap: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.activity-picker {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.activity-picker legend {
  margin-bottom: 10px;
  padding: 0;
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 800;
}

.activity-controls {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.level-control,
.sublevel-control {
  grid-column: span 1;
}

.section-control,
.exercise-number-control {
  grid-column: span 2;
}

.line-control {
  grid-column: 1 / -1;
}

.exercise-control {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.exercise-control select {
  width: 100%;
  height: 40px;
  border: 1px solid #2d352c;
  border-radius: 8px;
  background: #0d0f0d;
  color: var(--text);
  font: inherit;
  padding: 0 12px;
}

.exercise-control select:disabled {
  color: #7f887a;
  cursor: wait;
  opacity: 0.72;
}

.exercise-control select:focus-visible {
  outline: 4px solid rgba(117, 216, 255, 0.28);
  outline-offset: 3px;
}

.volume-control {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.volume-control input {
  width: 100%;
  accent-color: var(--green);
}

.volume-control strong {
  min-width: 42px;
  color: var(--text);
  text-align: right;
}

.token-row,
.drop-row {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 112px;
  justify-content: center;
  align-items: center;
  gap: clamp(26px, 8vw, 84px);
}

.drop-row {
  align-items: start;
}

.token,
.drop-target {
  width: clamp(78px, 13vw, 104px);
  aspect-ratio: 1;
  border-radius: 50%;
}

.token {
  position: relative;
  border: 0;
  background: var(--gray-token);
  cursor: grab;
  opacity: 0;
  box-shadow:
    inset 0 -12px 0 rgba(0, 0, 0, 0.13),
    0 18px 34px rgba(0, 0, 0, 0.32);
  touch-action: none;
  transform: translateY(calc(var(--drag-y, 0) - 10px));
  transition:
    background 160ms ease,
    transform 260ms ease,
    box-shadow 160ms ease,
    opacity 460ms ease;
}

.activity-stage.tokens-visible .token {
  opacity: 1;
  transform: translateY(var(--drag-y, 0));
}

.token::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -72px;
  width: 34px;
  height: 58px;
  border-left: 7px solid rgba(241, 245, 236, 0.86);
  border-bottom: 7px solid rgba(241, 245, 236, 0.86);
  border-radius: 0 0 0 18px;
  transform: translateX(-50%) rotate(-18deg);
  opacity: 0;
  pointer-events: none;
}

/* .token.is-demo::after {
  opacity: 1;
  animation: arrowNudge 860ms ease-in-out infinite;
} */

.token.is-ready {
  cursor: grab;
}

.token.is-demo,
.token.is-user-active {
  background: var(--violet);
  box-shadow:
    inset 0 -12px 0 rgba(0, 0, 0, 0.12),
    0 18px 38px rgba(185, 169, 235, 0.28);
}

.token.is-shaking {
  animation: tokenShake 240ms ease-in-out 2;
}

.token.is-dragging {
  z-index: 4;
  cursor: grabbing;
  transition: none;
}

.token.is-complete {
  cursor: default;
  background: var(--green-bright);
  box-shadow:
    inset 0 -12px 0 rgba(0, 0, 0, 0.12),
    0 18px 38px rgba(183, 242, 15, 0.26);
}

.activity-stage.tokens-visible .token.is-deleted {
  opacity: 0;
  pointer-events: none;
  transform: translateY(calc(var(--drag-y, 0) + 14px)) scale(0.82);
}

.token.is-substituted {
  background: var(--blue);
  box-shadow:
    inset 0 -12px 0 rgba(0, 0, 0, 0.12),
    0 18px 38px rgba(79, 156, 255, 0.3);
}

.token.is-helper {
  background: var(--violet);
  box-shadow:
    inset 0 -12px 0 rgba(0, 0, 0, 0.12),
    0 18px 38px rgba(185, 169, 235, 0.24);
}

.drop-target {
  border: 2px solid transparent;
  background: transparent;
  pointer-events: none;
}

.drop-target.is-ready {
  border-color: transparent;
  background: transparent;
}

.drop-target.is-filled {
  border-color: transparent;
  background: transparent;
}

@keyframes voiceGlow {
  from {
    transform: scaleY(0.92);
  }

  to {
    transform: scaleY(1.05);
  }
}

@keyframes arrowNudge {
  0%,
  100% {
    transform: translateX(-50%) translateY(-4px) rotate(-18deg);
  }

  50% {
    transform: translateX(-50%) translateY(8px) rotate(-18deg);
  }
}

@keyframes tokenShake {
  0%,
  100% {
    left: 0;
  }

  30% {
    left: -7px;
  }

  65% {
    left: 7px;
  }
}

@media (max-width: 700px) {
  body {
    overflow-y: auto;
  }

  .game {
    grid-template-rows: 110px 64px auto auto;
    padding: 18px 14px 24px;
  }

  .voice-panel {
    height: 108px;
  }

  .activity-stage {
    min-height: 390px;
    grid-template-rows: 138px 160px;
  }

  .debug-panel {
    grid-template-columns: 1fr;
  }

  .activity-controls {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .level-control,
  .sublevel-control,
  .section-control,
  .exercise-number-control {
    grid-column: span 1;
  }

  .line-control {
    grid-column: 1 / -1;
  }

  .token-row,
  .drop-row {
    grid-auto-columns: minmax(72px, 90px);
    gap: clamp(14px, 4vw, 24px);
  }

  .token::after {
    bottom: -58px;
    height: 48px;
  }
}