.rng-534-tool {
  font-family: Arial, sans-serif;
  max-width: 720px;
  margin: 0 auto;
  padding: 16px;
}

.rng-534-tool__box {
  background: #ffffff;
  border: 1px solid #ddd;
  border-radius: 10px;
  padding: 20px;
  text-align: center;
}

.rng-534-tool__title {
  font-size: 22px;
  margin-bottom: 8px;
  color: #222;
}

.rng-534-tool__desc {
  font-size: 14px;
  color: #555;
  margin-bottom: 20px;
}

.rng-534-tool__controls {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.rng-534-tool__btn {
  min-height: 44px;
  padding: 0 18px;
  font-size: 15px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  background: #4CAF50;
  color: #fff;
  transition: background 0.2s ease, transform 0.2s ease;
}

.rng-534-tool__btn:hover {
  background: #43a047;
  transform: translateY(-1px);
}

.rng-534-tool__btn:active {
  transform: translateY(0);
}

.rng-534-tool__result {
  font-size: 36px;
  font-weight: bold;
  margin: 16px 0;
  color: #4CAF50;
  min-height: 44px;
}

.rng-534-tool__btn--copy {
  width: 100%;
  max-width: 220px;
  margin: 0 auto;
}

/* Tablet */
@media (max-width: 768px) {
  .rng-534-tool__title {
    font-size: 20px;
  }
  .rng-534-tool__result {
    font-size: 32px;
  }
}

/* Mobile */
@media (max-width: 480px) {
  .rng-534-tool__controls {
    flex-direction: column;
  }
  .rng-534-tool__btn {
    width: 100%;
  }
}