* {
      box-sizing: border-box;
      outline: none;
    }

    body {
      margin: 30px;
      font-family: sans-serif;
      background-color: #ffd015;
    }

    a {
  -webkit-tap-highlight-color:rgba(0,0,0,0);
  cursor:pointer;
}

    .container {
      margin: 0 auto;
      display: flex;
      max-width: 900px;
      min-height: 50vh;
      flex-direction: column;
      border-radius: 20px 20px 0 0;
      border: solid 2.3px #000000;
      background-color: #ffffff;
    }

    .container:-webkit-scrollbar {
  width: 8px; /* スクロールバーの太さ */
  background-color: #373737; /* 背景色 */
  margin: 2px;
}

.container::-webkit-scrollbar-thumb {
  background-color: #ffd015; /* スクロールのつまみ */
}

    header {
      width: 100%;
      padding: 5px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: solid;
    }

    .content {
      display: flex;
      flex: 1;
    }


        /* メニューバーのやつ。 */

    .sidebar {
      min-height: 100vh;
      max-width: 200px;
      padding: 10px;
      background-color: #ffffff;
    }


    .bar a {
  /* border: 1px solid #000000; */
    }

    /* メニューの周り */
  .menu {
        border: 2px solid #000000; 
box-shadow: 4px 4px 0 #000;
}


        .menu a {
      display: block;
      padding: 5px;
      text-decoration: none;
      color: #333;
      font-size: 14px;  

    }




    .menu a:hover {
    background-color: #ffd015;
    }

    /* 謎の飾り */
.contents {
background-color:#000000;
color: #ffffff;
padding: 5px;
border: 2px solid #fcfcfc; 
font-size: 10px;
text-align: right;  
}


    /* メニュー終わり */
    
.card {
  background: #fff;
  border: 2px solid #000;
  border-radius: 0;
  padding: 10px;
  margin: 20px 5px 20px 5px;
  box-shadow: 4px 4px 0 #000;
  max-width: 500px;
}
/* 基本枠 */

.logo {
  text-align: center;
  background-color: #ffffff;

}

.logo img {
  width: 200px;
  height: auto;
  display: inline-block; /* 中央寄せには inline-block が必要 */
  padding: 5px;
}




.main {
  max-height: 100vh;
  flex: 1;
  margin: 10px 10px 0;
  background-color: rgb(255, 255, 255);
  overflow: auto;      
  overflow-x: auto;     /* 横スクロールも有効 */
}




    .footer {
      text-align: center;
      padding: 20px;
      background: rgb(255, 255, 255);
      font-size: 12px;
    }

    .hamburger {
      display: none;
      font-size: 28px;
      background: transparent;
      border: none;
      cursor: pointer;
      position: fixed;
      top: 20px;
      right: 20px;
      z-index: 10;
    }


    /* 携帯 */

    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      background: #ffd015;
      backdrop-filter: blur(4px);
      animation: fadeIn 0.4s ease;
      z-index: 5;
      padding: 60px 20px 20px;
      flex-direction: column;
      align-items: center;
      justify-content: flex-start;
    }

    .mobile-menu.active {
      display: flex;
    }

    .mobile-menu a {
      font-size: 13px;
      margin: 15px 0;
      color: #333;
      text-decoration: none;

    }

    .mobile-menu a:hover {
      text-decoration: underline;
    }

    .close-btn {
      position: absolute;
      top: 20px;
      right: 20px;
      font-size: 30px;
      cursor: pointer;
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
      }
      to {
        opacity: 1;
      }
    }



    @media (max-width: 768px) {

        body{
        margin: 0 auto;
        }

      .content {
        flex-direction: column;
        margin: 10px;
      }

      .sidebar {
        display: none;
      }



      .hamburger {
        display: block;
      }

      .main::-webkit-scrollbar{
      display: none;
    }



  .container {
    width: 100%;
          margin: 30px 0;
  }


  }


    @media (min-width: 769px) {
      .hamburger,
      .mobile-menu
       {
        display: none !important;
    
      }
    }


    /* @media (min-width: 769px) {
  header {
    display: none !important;
  }
  
} */