.ech-nav-toggle,
.ech-nav-overlay{
  display: none;
}

@media (max-width: 999px){

  .ech-nav-overlay{
    position: fixed;
    inset: 0;
    z-index: 1200;
    background: rgba(0,0,0,0.35);
    display: none;
  }
  body.nav-open .ech-nav-overlay{
    display: block;
  }

  .ech-nav-toggle{
    position: fixed;
    top: 35px;
    right: 10px;
    transform: translateY(-50%);
    z-index: 1300;

    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: 44px;
    height: 44px;
    padding: 0;
    cursor: pointer;

    border-radius: 10px;
    border: 1px solid rgba(0,84,134,0.6);
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
  }

  .ech-nav-toggle .ech-burger{
    position: relative;
    width: 30px;
    height: 3px;
    border-radius: 3px;
    background: rgb(0,84,134);
    display: block;
  }
  .ech-nav-toggle .ech-burger::before,
  .ech-nav-toggle .ech-burger::after{
    content: "";
    position: absolute;
    left: 0;
    width: 30px;
    height: 3px;
    border-radius: 3px;
    background: rgb(0,84,134);
  }
  .ech-nav-toggle .ech-burger::before{ top: -9px; }
  .ech-nav-toggle .ech-burger::after { top:  9px; }

  body.nav-open .ech-nav-toggle .ech-burger{ background: transparent; }
  body.nav-open .ech-nav-toggle .ech-burger::before{ top: 0; transform: rotate(45deg); }
  body.nav-open .ech-nav-toggle .ech-burger::after { top: 0; transform: rotate(-45deg); }

  .ech-nav{
    position: fixed;
    left: 0;
    right: 0;
    top: 300px;
    z-index: 1250;
    pointer-events: none;
    background: transparent;
  }

  .ech-nav-list{
    display: none;
    pointer-events: auto;

    width: 100%;
    margin: 0;
    padding: 16px;
    list-style: none;

    background: #ffffff;
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);

    max-height: calc(100vh - 70px - 10px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  body.nav-open .ech-nav-list{
    display: block;
  }

  .ech-nav-item{ margin:0; padding:0; }

  .ech-nav-link{
    display: block;
    padding: 12px 16px;
    margin: 0 0 8px 0;

    text-decoration: none;
    background: rgb(0,84,134);
    color: #ffffff;
    font-size: 14px;
  }

  .ech-submenu{
    display: none !important;
  }

  @media (prefers-color-scheme: dark){
    .ech-nav-toggle{
      border: 1px solid rgba(242,242,242,0.6);
      background: rgba(60,60,60,0.55);
    }

    .ech-nav-toggle .ech-burger,
    .ech-nav-toggle .ech-burger::before,
    .ech-nav-toggle .ech-burger::after{
      background: rgb(242,242,242);
    }

    .ech-nav-list{
      background: rgb(60,60,60);
    }

    .ech-nav-link{
      background: rgb(242,242,242);
      color: rgb(0,84,134);
    }
  }
}