/*============
nav
=============*/
  nav {
    display: block;
    position: fixed;
    top: 0;
    left: -300px;
    bottom: 0;
    width: 300px;
    background: #3b3936e6;
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    transition: .5s;
    z-index: 3;
  }
  .open nav {
    left: 0;
  }
  nav .inner {
    padding: 25px;
  }
  nav .inner ul {
    list-style: none;
    margin: 0;
    padding: 0;
  }
  nav .inner ul li {
    position: relative;
    margin: 0;
    border-bottom: 1px solid #c0c0c0;
  }
  nav .inner ul li a {
    display: block;
    color: #c0c0c0;
    font-family: 'Caveat';
    font-size: 18px;
    padding: 0.6em;
    text-decoration: none;
    transition-duration: 0.2s;
  }
  nav .inner ul li a:hover {
    background: #313131;
  }
  @media screen and (max-width: 767px) {
    nav {
      left: -240px;
      width: 240px;
    }
  }
  
  /*============
  @keyframes
  =============*/
  @keyframes equalizer01 {
    0% {
      width: 70%;
    }
    10% {
      width: 50%;
    }
    20% {
      width: 100%;
    }
    30% {
      width: 10%;
    }
    40% {
      width: 50%;
    }
    50% {
      width: 70%;
    }
    60% {
      width: 50%;
    }
    70% {
      width: 10%;
    }
    80% {
      width: 100%;
    }
    90% {
      width: 10%;
    }
    100% {
      width: 70%;
    }
  }
  @keyframes equalizer02 {
    0% {
      width: 30%;
    }
    10% {
      width: 20%;
    }
    20% {
      width: 40%;
    }
    30% {
      width: 10%;
    }
    40% {
      width: 20%;
    }
    50% {
      width: 30%;
    }
    60% {
      width: 20%;
    }
    70% {
      width: 10%;
    }
    80% {
      width: 40%;
    }
    90% {
      width: 10%;
    }
    100% {
      width: 30%;
    }
  }
  /*============
  .toggle_btn
  =============*/
  .toggle_btn {
    display: block;
    position: fixed;
    top: 30px;
    left: 30px;
    width: 70px;
    height: 40px;
    transform: translate(0, 0);
    transition: all .5s;
    cursor: pointer;
    z-index: 3;
  }
  .open .toggle_btn {
    left: 330px;
  }
  .toggle_btn span {
    display: block;
    position: absolute;
    left: 0;
    width: 30px;
    height: 3px;
    background-color: #a8a8a8;
    transition: all .5s;
  }
  .toggle_btn span:nth-child(1) {
    top: 5px;
    width: 60px;
    animation: equalizer01 7000ms infinite;
  }
  .toggle_btn span:nth-child(2) {
    top: 15px;
    width: 30px;
    animation: equalizer02 5000ms infinite;
    animation-delay: 0.33s;
  }
  .toggle_btn span:nth-child(3) {
    top: 25px;
    width: 20px;
    animation: equalizer02 5000ms infinite;
  }
  .open .toggle_btn span {
    background-color: #fff;
    width: 30px;
  }
  .open .toggle_btn span:nth-child(1) {
    transform: translate(0, 10px) rotate(-45deg);
    animation: unset;
  }
  .open .toggle_btn span:nth-child(2) {
    opacity: 0;
    animation: unset;
  }
  .open .toggle_btn span:nth-child(3) {
    transform: translate(0, -10px) rotate(45deg);
    animation: unset;
  }
  @media screen and (max-width: 767px) {
    .open .toggle_btn {
      left: 260px;
    }
  }
  
  /*============
  #mask
  =============*/
  #mask {
    display: none;
  }
  .open #mask {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
    opacity: .8;
    z-index: 2;
    cursor: pointer;
    transition: all .5s;
  }

  #icontitle {
    display: block;
    color: #c0c0c0;
    font-family: 'Caveat';
    font-size: 18px;
    padding: 0.6em;
    padding-top: 50px;
    transition-duration: 0.2s;
  }

  #music {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }

  #sns {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }

  #iconlist a {
    display: block;
    width: 36px;
    height: 36px;
    text-decoration: none;
    border-radius: 4px;
    overflow: hidden;
    background-color:#232323;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  }