footer.footer {
  position: fixed;
  z-index: 3;
  bottom: 1rem;
  left: 50%;
  transform: translate(-50%, 0);
  background: #111;
  border-radius: 1rem;
  width: calc(100% - 2rem);
  border: 1px solid #333;
  overflow: hidden;

  .footer-wrap {
    width: 100%;
    display: flex;
    flex-direction: column;

    .music-play-gauge-wrap {
      height: 0.5rem;
      width: 100%;
      position: relative;

      .music-play-gauge-background {
        height: 0.5rem;
        width: 100%;
        background: #333;
        cursor: pointer;
      }
      .music-play-gauge-foreground {
        height: 0.5rem;
        width: 50%;
        background: #fff;
        position: absolute;
        left: 0;
        bottom: 0;
        cursor: pointer;
      }
      input {
        transform: translate(-50%, -50%);
        position: absolute;
        top: 50%;
        left: 50%;

        width: 100%;
        appearance: none;
        cursor: pointer;
        outline: none;
        margin: 0; /* reset margin */
        padding: 0; /* reset padding */
        background-color: transparent;
        height: 0.5rem;

        &::-webkit-slider-thumb { /* Webkit 기반 브라우저 */
          appearance: none;
          width: 0.5rem; /* height와 일치 */
          height: 0.5rem;
          border: none;
          border-radius: 50%;
          background-color: transparent;
          transition: all 0.15s ease-in-out;
          margin-top: calc((0.5rem - 0.5rem) * 0.5); /* calc((track의 height - thumb의 height) * 0.5) */
        }

        &::-moz-range-thumb { /* 파이어폭스 */
          appearance: none;
          width: 0.5rem; /* height와 일치 */
          height: 0.5rem;
          border: none;
          border-radius: 50%;
          background-color: transparent;
          transition: all 0.15s ease-in-out;
          display: none;
        }

        &::-webkit-slider-runnable-track { /* Webkit 기반 브라우저 */
          cursor: pointer;
          width: 100%;
          height: 0.5rem;
          background-color: transparent;
          border-radius: 0.25rem;
        }
        &::-moz-range-track { /* 파이어폭스 */
          cursor: pointer;
          width: 100%;
          height: 0.5rem;
          background-color: transparent;
          border-radius: 0.25rem;
        }
      }
    }

    .music-info-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;

      .music-info-wrap-in {
        gap: 1rem;
        align-items: center;
        display: flex;
        width: 33%;

        &:hover {
          background: none;
        }

        .img-wrap {
          border-radius: 0.25rem;
          width: 5rem;
          height: 5rem;
          display: inline-block;
          background-color: #222;
        }

        .title-wrap {
          display: flex;
          flex-direction: column;
          gap: 0.5rem;
          overflow: hidden;
          width: 100%;
          flex: 1;

          .title {
            font-size: 1rem;
          }
          .artist {
            font-size: 0.75rem;
            color: #999;
          }
        }
      }

      .music-controller-wrap {
        flex: 1;
        width: 33%;
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 0.5rem;

        button, a {
          width: 3.5rem;
          height: 3.5rem;
          padding: 1rem;
          border-radius: 50%;
          .xi {
            font-size: 1.5rem;
            color: #999;

            &.active {
              color: #fff;
            }
          }
          &#music-controll-play .xi {
            font-size: 3rem;
          }
        }

        .only-760 {
          display: none;
        }
      }

      .button-wrap {
        flex: 1;
        width: 33%;
        display: flex;
        justify-content: flex-end;
        align-items: center;
        gap: 0.5rem;
        padding-right: 1rem;

        .music-volume-gauge-wrap {
          display: flex;
          align-items: center;
          gap: 0.25rem;
          width: 100%;
          max-width: 240px;
          margin-right: 1rem;

          .music-volume-gauge-wrap-in {
            width: 100%;
            position: relative;
            border-radius: 0.25rem;
            overflow: hidden;

            .music-volume-gauge-background {
              height: 0.5rem;
              width: 100%;
              background: #222;
              cursor: pointer;
            }
            .music-volume-gauge-foreground {
              height: 0.5rem;
              width: 50%;
              background: #fff;
              position: absolute;
              left: 0;
              bottom: 0;
              cursor: pointer;
            }

            input {
              transform: translate(-50%, -50%);
              position: absolute;
              top: 50%;
              left: 50%;

              width: 100%;
              appearance: none;
              cursor: pointer;
              outline: none;
              margin: 0; /* reset margin */
              padding: 0; /* reset padding */
              background-color: transparent;
              height: 0.5rem;

              &::-webkit-slider-thumb { /* Webkit 기반 브라우저 */
                appearance: none;
                width: 0.5rem; /* height와 일치 */
                height: 0.5rem;
                border: none;
                border-radius: 50%;
                background-color: transparent;
                transition: all 0.15s ease-in-out;
                margin-top: calc((0.5rem - 0.5rem) * 0.5); /* calc((track의 height - thumb의 height) * 0.5) */
              }

              &::-moz-range-thumb { /* 파이어폭스 */
                appearance: none;
                width: 0.5rem; /* height와 일치 */
                height: 0.5rem;
                border: none;
                border-radius: 50%;
                background-color: transparent;
                transition: all 0.15s ease-in-out;
                display: none;
              }

              &::-webkit-slider-runnable-track { /* Webkit 기반 브라우저 */
                cursor: pointer;
                width: 100%;
                height: 0.5rem;
                background-color: transparent;
                border-radius: 0.25rem;
              }
              &::-moz-range-track { /* 파이어폭스 */
                cursor: pointer;
                width: 100%;
                height: 0.5rem;
                background-color: transparent;
                border-radius: 0.25rem;
              }
            }
          }
        }

        button, a {
          width: 3.5rem;
          height: 3.5rem;
          padding: 1rem;
          border-radius: 50%;
          .xi {
            font-size: 1.5rem;
          }
        }
      }
    }
  }
  audio {
    display: none;
  }
}