header {
  position: fixed;
  top: 0;
  width: ~"calc(100% - 130px)";
  height: 40px;
  line-height: 40px;
  padding: 15px 30px;
  background: #fff;
  box-shadow: 0 0 4px rgba(0, 0, 0, .25);
  margin: 0 -30px;
  z-index: 2;
  font-size: 14px;

  .logo {
    height: 26px;
    margin: 7px 0;
    display: block;

    img {
      display: block;
    }
  }

  .project {
    font-size: 15px;
    color: #1b3445;
    display: inline-block;
    line-height: 40px;
    height: 40px;
  }

  .account {
    .func-margin-start(25px);
  }

  .avatar {
    height: 40px;
    width: 40px;
  }

  .notifications {
    position: relative;
    font-size: 20px;

    &:after {
      position: absolute;
      content: "";
      display: block;
      background: var(--config-color-danger);
      width: 8px;
      height: 8px;
      border-radius: 50%;
      top: 3px;
      .func-end(3px);
    }
  }

  nav {
    box-shadow: 0 0 4px rgba(0, 0, 0, .25);
    background: #1b3445;
    color: #788c99;
    position: fixed;
    height: 100%;
    width: 70px;
    top: 0;
    .func-start(0);

    .icon {
      display: block;
      border: none;
      margin: 18px 10px 50px 10px;

      img {
        display: block;
      }

      &:hover {
        border-bottom: none;

        svg g {
          fill: var(--config-color-focus)
        }
      }
    }
    
    .links a {
      padding: 0;
      border: none;
      display: block;
      text-align: center;
      color: #788c99;
      font-size: 12px;
      margin-bottom: 30px;

      .icon {
        margin: 0 10px;
        height: 24px;
        font-size: 20px;
        line-height: 24px;
      }

      &:hover {
        border-bottom: none;
        color: var(--config-color-focus);
      }
    }
  }
}