html {
  scroll-behavior: smooth;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  display: flex;
  justify-content: center;
  background: var(--light-gray);
}

.main {
  max-width: 480px;
  width: 100%;
  position: relative;
  background: #fff;
}

.line-link{
  display: flex;
  justify-content: center;
}

.line-link img{
  width: 91px;
  margin: 0 auto;
}

.sns-icon{
  display: flex;
  justify-content: center;
  gap: 24px;
}

.sns-icon img{
  width: 20px;
  object-fit: contain;
}

.left-block,
.right-block {
  display: none;
}

@media screen and (min-width: 640px) {
  .main {
    max-width: 424px;
    margin: 0 auto;
  }

  .left-block {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 40px;
    background: #fff;
    height: 100vh;
    position: sticky;
    top: 0;
    overflow: hidden;
  }

  .right-block {
    display: flex;
    justify-content: flex-end;
    flex-direction: column;
    flex: 1;
    padding: 40px;
    background: #fff;
    height: 100vh;
    position: sticky;
    top: 0;
    overflow: hidden;
  }
}