.hud {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hud__sound-button {
  width: 42px;
  height: 42px;
  border: none;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 8px 18px rgba(255, 164, 200, 0.35);
  color: #d85c8c;
  font-size: 1.15rem;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
  touch-action: manipulation;
}

.hud__sound-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 22px rgba(255, 143, 193, 0.45);
}

.hud__sound-button.is-muted {
  opacity: 0.62;
  color: #8a6b7e;
}

.game-title-return-button {
  position: absolute;
  top: 2vh;
  left: 4vw;
  z-index: 3;
  border: none;
  border-radius: 999px;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 8px 18px rgba(255, 164, 200, 0.35);
  color: #d85c8c;
  font-weight: 700;
  cursor: pointer;
  touch-action: manipulation;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.game-title-return-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 22px rgba(255, 143, 193, 0.45);
}

.game-title-return-button.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.credit-modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(255, 232, 244, 0.78);
  backdrop-filter: blur(6px);
}

.credit-modal.is-hidden {
  display: none;
}

.credit-modal__content {
  position: relative;
  width: min(560px, 92vw);
  padding: 30px 26px 26px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 24px 48px rgba(216, 92, 140, 0.32);
  text-align: center;
  color: #5c3b54;
}

.credit-modal__close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 999px;
  background: #ffd3e5;
  color: #6b3e58;
  font-size: 1.3rem;
  cursor: pointer;
}

.credit-modal__title {
  margin: 0 0 20px;
  font-size: 1.45rem;
  color: #d85c8c;
  letter-spacing: 0.08em;
}

.credit-modal__section {
  margin: 0 auto 18px;
  padding: 18px;
  border-radius: 20px;
  background: #fff6fb;
  border: 2px solid rgba(255, 164, 200, 0.42);
}

.credit-modal__label {
  margin: 0 0 6px;
  font-size: 0.85rem;
  color: #b45a7b;
  font-weight: 700;
}

.credit-modal__main {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 800;
  color: #d85c8c;
}

.credit-modal__sub {
  margin: 8px 0 0;
  font-size: 1rem;
}

.credit-modal__note {
  margin: 0;
  line-height: 1.7;
  font-size: 0.9rem;
  color: #6a4663;
}

.credit-modal__links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.credit-modal__links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-width: 112px;
  padding: 10px 14px;
  border-radius: 999px;
  background: #444;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.92rem;
  box-shadow: 0 10px 18px rgba(60, 60, 60, 0.18);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.credit-modal__links a::after {
  content: "↗";
  font-size: 0.82rem;
  opacity: 0.78;
}

.credit-modal__links a:hover {
  transform: translateY(-1px);
  background: #333;
  box-shadow: 0 14px 22px rgba(60, 60, 60, 0.24);
}

@media (max-width: 480px) {
  .hud {
    right: 3vw;
    gap: 6px;
  }

  .hud__sound-button {
    width: 38px;
    height: 38px;
    font-size: 1rem;
  }

  .game-title-return-button {
    left: 3vw;
    padding: 9px 12px;
    font-size: 0.9rem;
  }

  .credit-modal__links {
    gap: 8px;
  }

  .credit-modal__links a {
    min-width: 92px;
    padding: 9px 12px;
    font-size: 0.86rem;
  }
}