/* レスポンシブ横並び・縦並び */
.main-container {
  margin: 1%;
  display: flex;
  justify-content: center;   /* 横方向の配置 */
  align-items: flex-start;   /* 子要素の上端揃え */
  width: 95%;
}
.leftparts00 {
  margin: 0;
  width: 100%;
  max-width: 300px;
}
.rightparts00 {
  margin: 0;
  width: 100%;
  max-width: 500px;
}

.leftparts01 {
  margin: 0;
  width: 100%;
  max-width: 400px;
}
.rightparts01 {
  margin: 0;
  width: 100%;
  max-width: 400px;
}

.leftparts02 {
  margin: 0;
  width: 100%;
  max-width: 600px;
}
.rightparts02 {
  margin: 0;
  width: 100%;
  max-width: 300px;
}

.leftparts-intr1 {
  margin: 0;
  width: 100%;
}
.rightparts-intr1 {
  margin: 0; 
  width: 100%;
  text-align:center;
}

.modal-container {
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.leftmodal01 {
  margin: 0;
  width: 100%;
}
.rightmodal01 {
  margin: 0;
  width: 100%;
}

@media (max-width: 768px) {
  .main-container {
    flex-direction: column; /* 縦方向に並べる */
  }
}