.reward-sound-control {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 160;
}

.reward-sound-toggle {
  min-height: 40px;
  padding: 9px 13px;
  border: 1px solid var(--academic-border-strong, #bfd4cb);
  border-radius: 999px;
  background: rgb(255 255 255 / 95%);
  color: var(--academic-primary-dark, #074a38);
  box-shadow: var(--academic-shadow-small, 0 8px 24px rgb(29 68 56 / 7%));
  font: inherit;
  font-size: 0.86rem;
  font-weight: 850;
  cursor: pointer;
  backdrop-filter: blur(10px);
}

.reward-sound-toggle:hover,
.reward-sound-toggle:focus-visible {
  border-color: var(--academic-primary, #0c684b);
  outline: 3px solid rgb(12 104 75 / 18%);
  outline-offset: 2px;
}

.reward-feedback--active {
  position: relative;
  animation: reward-feedback-pop 620ms ease-out;
  box-shadow: 0 0 0 4px rgb(23 105 77 / 14%);
}

.reward-feedback--active.reward-feedback--small {
  animation: reward-feedback-small-pop 520ms ease-out;
  box-shadow: 0 0 0 3px rgb(23 105 77 / 10%);
}

.reward-feedback--active.reward-feedback--milestone {
  animation: reward-feedback-milestone-pop 650ms ease-out;
  box-shadow: 0 0 0 6px rgb(23 105 77 / 20%);
}

.reward-feedback__spark {
  position: absolute;
  top: -13px;
  right: 16px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: var(--academic-primary-dark, #3c8b04);
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 900;
  opacity: 0;
  pointer-events: none;
}

.reward-feedback--active > .reward-feedback__spark {
  animation: reward-feedback-spark 620ms ease-out;
}

.reward-feedback--active.reward-feedback--small > .reward-feedback__spark {
  animation: reward-feedback-small-spark 520ms ease-out;
}

.reward-feedback--active.reward-feedback--milestone > .reward-feedback__spark {
  animation: reward-feedback-milestone-spark 650ms ease-out;
}

@keyframes reward-feedback-small-pop {
  0% {
    transform: scale(1);
  }

  45% {
    transform: scale(1.012);
  }

  100% {
    transform: scale(1);
  }
}

@keyframes reward-feedback-pop {
  0% {
    transform: scale(1);
  }

  38% {
    transform: scale(1.025);
  }

  100% {
    transform: scale(1);
  }
}

@keyframes reward-feedback-spark {
  0% {
    opacity: 0;
    transform: translateY(6px) scale(0.82);
  }

  34% {
    opacity: 1;
    transform: translateY(-2px) scale(1.08);
  }

  100% {
    opacity: 0;
    transform: translateY(-8px) scale(1);
  }
}

@keyframes reward-feedback-small-spark {
  0% {
    opacity: 0;
    transform: translateY(4px) scale(0.9);
  }

  40% {
    opacity: 0.8;
    transform: translateY(-1px) scale(1);
  }

  100% {
    opacity: 0;
    transform: translateY(-5px) scale(1);
  }
}

@keyframes reward-feedback-milestone-pop {
  0% {
    transform: scale(1);
  }

  28% {
    transform: scale(1.035);
  }

  62% {
    transform: scale(1.012);
  }

  100% {
    transform: scale(1);
  }
}

@keyframes reward-feedback-milestone-spark {
  0% {
    opacity: 0;
    transform: translateY(8px) scale(0.78);
  }

  32% {
    opacity: 1;
    transform: translateY(-3px) scale(1.18);
  }

  100% {
    opacity: 0;
    transform: translateY(-12px) scale(1.05);
  }
}

@media (max-width: 650px) {
  .reward-sound-control {
    right: 12px;
    bottom: 12px;
  }

  .reward-sound-toggle {
    padding: 8px 11px;
    font-size: 0.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reward-feedback--active {
    animation: none;
    box-shadow: 0 0 0 3px rgb(23 105 77 / 18%);
  }

  .reward-feedback__spark {
    animation: none;
    transform: none;
  }

  .reward-feedback--active > .reward-feedback__spark {
    opacity: 1;
  }
}

.lesson-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 12px;
  height: 44px;
  padding: 0 14px;
  background: rgb(255 255 255 / 96%);
  border-bottom: 1px solid var(--academic-border, #e5e5e5);
  box-shadow: var(--academic-shadow-small, 0 8px 24px rgb(29 68 56 / 7%));
  backdrop-filter: blur(10px);
}

.lesson-progress-bar__track {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
  height: 10px;
  border-radius: 999px;
  background: var(--academic-primary-soft, #e3ffc7);
}

.lesson-progress-bar__fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(
    90deg,
    var(--academic-primary, #58cc02),
    var(--academic-primary-dark, #3c8b04)
  );
  transition: width 550ms cubic-bezier(0.22, 1, 0.36, 1);
}

.lesson-progress-bar__star {
  position: absolute;
  top: 50%;
  left: 0%;
  transform: translate(-50%, -50%);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--academic-primary-dark, #3c8b04);
  text-shadow: 0 1px 0 rgb(255 255 255 / 85%);
  transition: left 550ms cubic-bezier(0.22, 1, 0.36, 1);
}

.lesson-progress-bar--complete .lesson-progress-bar__fill {
  background: linear-gradient(90deg, #ffb703, #fb8500);
}

.lesson-progress-bar--complete .lesson-progress-bar__star {
  color: #fb8500;
  animation: lesson-progress-star-celebrate 750ms ease-out;
}

.lesson-progress-bar .reward-sound-toggle {
  position: relative;
  flex: 0 0 auto;
  min-height: 32px;
  width: 32px;
  height: 32px;
  padding: 0;
  display: grid;
  place-items: center;
  font-size: 1rem;
}

.lesson-progress-bar .reward-sound-toggle[aria-pressed="false"] .reward-sound-toggle__icon {
  opacity: 0.45;
}

.lesson-progress-bar .reward-sound-toggle[aria-pressed="false"]::after {
  content: "";
  position: absolute;
  top: 7px;
  bottom: 7px;
  left: 50%;
  width: 2px;
  background: var(--academic-primary-dark, #3c8b04);
  transform: translateX(-50%) rotate(45deg);
}

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

@keyframes lesson-progress-star-celebrate {
  0% {
    transform: translate(-50%, -50%) scale(1) rotate(0deg);
  }

  40% {
    transform: translate(-50%, -50%) scale(1.6) rotate(-18deg);
  }

  70% {
    transform: translate(-50%, -50%) scale(1.2) rotate(12deg);
  }

  100% {
    transform: translate(-50%, -50%) scale(1.35) rotate(0deg);
  }
}

@media (max-width: 650px) {
  .lesson-progress-bar {
    height: 40px;
    gap: 8px;
    padding: 0 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lesson-progress-bar__fill,
  .lesson-progress-bar__star {
    transition: none;
  }

  .lesson-progress-bar--complete .lesson-progress-bar__star {
    animation: none;
  }
}