@media screen and (min-width: 960px) {
  .reserve-button {
    width: 145px;
    display: block;
    padding: 16px 28px;
    background-color: #eeb;
    margin: 10px auto; /* 上下20px、左右自動で中央寄せ */
    color: #20a0ff;
    font-size: 18px;
    font-weight: bold;
    text-decoration: none;
    border-radius: 8px;
    box-shadow: 0 3px 6px rgba(0,0,0,0.2);
    transition: background-color 0.3s ease;
  }
  .reserve-button:hover {
    background-color: #ffc;
  }
    .opening_message{
        width: 800px;
        margin: 0 auto;
        padding: 2em;
        border-radius:20px;
        background:#20a0ff;
        font-family:"sans-serif";
        justify-content: center;
    }
    h1{
        padding: 20px;
        text-align: center;
        color:#20a0ff;
    }
    img{
        width: 600px;
        height: 700px;
    }
  .img2{
    width: 1000px;
    height: 600px;
    display: block;
    margin-left: auto;
    margin-right: auto;
  }
    .bt1{
        font-size:20px;
        text-align: center;
    }
    .right{
        text-align: right;
    }
    p{
        font-size:30px;
        color:white;
    }
    a{
        text-align: center;
    }        
 }
 
@media screen and (max-width: 480px) {
  .reserve-button {
    width: 125px;
    display: block;
    padding: 16px 28px;
    background-color: #eeb;
    margin: 10px auto; /* 上下20px、左右自動で中央寄せ */
    color: #20a0ff;
    font-size: 12px;
    font-weight: bold;
    text-decoration: none;
    border-radius: 8px;
    box-shadow: 0 3px 6px rgba(0,0,0,0.2);
    transition: background-color 0.3s ease;
  }
  .reserve-button:hover {
    background-color: #ffc;
  }
    .opening_message{
        width: 280px;
        margin: 0 auto;
        padding: 2em;
        border-radius:20px;
        background:#20a0ff;
        font-family:"sans-serif";
        justify-content: center;
    }
    h1{
        font-size:25px;
        padding: 10px;
        text-align: center;
        color:#20a0ff;
    }
    img{
        width: 330px;
        height: 330px;
    }
  .img2{
    width: 300px;
    height: 200px;
    display: block;
    margin-left: auto;
    margin-right: auto;
  }
    .bt1{
        font-size:15px;
        text-align: center;
    }
    .right{
        text-align: right;
    }
    p{
        font-size:15px;
        color:white;
    }
    a{
        text-align: center;
    }       
}

@media screen and (min-width: 481px) and (max-width: 959px) {
  .reserve-button {
    width: 145px;
    display: block;
    padding: 16px 28px;
    background-color: #eeb;
    margin: 10px auto; /* 上下20px、左右自動で中央寄せ */
    color: #20a0ff;
    font-size: 18px;
    font-weight: bold;
    text-decoration: none;
    border-radius: 8px;
    box-shadow: 0 3px 6px rgba(0,0,0,0.2);
    transition: background-color 0.3s ease;
  }
  .reserve-button:hover {
    background-color: #ffc;
  }
    .opening_message{
        width: 800px;
        margin: 0 auto;
        padding: 2em;
        border-radius:20px;
        background:#20a0ff;
        font-family:"sans-serif";
        justify-content: center;
    }
    h1{
        padding: 20px;
        text-align: center;
        color:#20a0ff;
    }
    img{
        width: 600px;
        height: 700px;
    }
  .img2{
    width: 1000px;
    height: 600px;
    display: block;
    margin-left: auto;
    margin-right: auto;
  }
    .bt1{
        font-size:20px;
        text-align: center;
    }
    .right{
        text-align: right;
    }
    p{
        font-size:30px;
        color:white;
    }
    a{
        text-align: center;
    }      
}