style.css

 
* {
    margin: 0;  
    padding: 0;
  }
  body {
    font-family: "Poiret One", -apple-system, BlinkMacSystemFont, Segoe UI,
      Helvetica Neue, Arial, sans-serif, Amatic SC;
      font-size:13.25px
  }
  .container {
    background-image: linear-gradient(#7b4397, #dc2430);
    width: 100%;
    height: 100%;
    margin: 0px;
    padding: 0px;
    overflow-x: hidden;
    display: flex;
    /* height: 80vh;
    width: 100vw; */
    flex-wrap: wrap;
    /* overflow: hidden; */
  }
  .main {
    height: calc(100% - 50px);
    display: flex;
    flex: 1;
  }
  .sidebar {
    height: 100%;
    width: 220px;
    box-sizing: border-box;
    box-shadow: 0 0 2rem 0 rgb(0 0 0 / 5%);
    overflow: hidden;
    transition: width 0.5s ease;
  }
  .container.nav-closed .sidebar,
  .container.nav-closed .header-logo {
    width: 0;
  }
  .sidebar ul {
    display: flex;
    flex-direction: column;
    padding: 5px;
  }
  .sidebar ul li {
    display: flex;
    align-items: center;
  }
  .sidebar ul li a {
    color: #000;
    text-decoration: none;
    display: flex;
    align-items: center;
    width: 100%;
    padding: 10px;
    white-space: nowrap;
  }
  .sidebar ul li a.active,
  .sidebar ul li a:hover {
    background: #8a9ead;
  }
  .sidebar ul li span {
    margin-left: 16px;
    font-size: 16px;
    font-weight: 100;
  }
  .sidebar ul li i {
    font-size: 18px;
    color: #111;
    font-weight: normal;
  }
  .header {
    height: 50px;
    background: linear-gradient(#dc2430, #7b4397);;
    width: 100%;
    display: flex;
    align-items: center;
    flex-basis: 100%;
  }
  .sidebar ul li a.active i {
    color: #04a877fd;
  }
  .site-logo {
    height: 32px;
    width: 32px;
    min-height: 32px;
    min-width: 32px;
    margin: 0 18px 0 15px;
  }
  .site-logo path {
    fill: #fff;
  }
  .site-title {
    color: #fff;
    font-size: 24px;
    letter-spacing: 1px;
    font-weight: 400;
  }
  .page-content {
    padding: 10px 20px;
    box-sizing: border-box;
    width: 100%;
    flex: 1;
  }
  .header-search .button-menu {
    width: 28px;
    height: 28px;
    margin-right: 15px;
    background: none;
    border: 0;
    cursor: pointer;
  }
  .header-logo {
    display: flex;
    align-items: center;
    width: 220px;
    overflow: hidden;
    transition: width 0.5s ease;
  }
  .header-search input[type="search"] {
    height: 100%;
    width: 300px;
    padding: 10px 20px;
    box-sizing: border-box;
    font-size: 14px;
    font-weight: 100;
    background: none;
    border: none;
    color: #fff;
  }
  .header-search input[type="search"]:focus {
    outline: none;
  }
  .header-search input[type="search"]::placeholder {
    color: #ccc;
  }
  .header-search .button-menu:focus {
    outline: none;
    border: none;
  }

  @media screen and (max-width: 991px) {
    .page-content {
      width: 100vw;
    }
  }
  @media screen and (max-width: 767px) {
    .header-logo {
      display: none;
    }
  }

#zplane_polezero2{border:2px solid linear-gradient(#7b4397, #dc2430);}

#allpass {
  background-color: linear-gradient(#7b4397, #dc2430);
  display: flex;
  flex-wrap: wrap;
  margin-top:6% ;
  flex-direction: column;
  overflow: hidden;
  justify-content: space-between;
}

#allpass div {
    justify-content: center;
}

.menu {
  background-color: transparent;
  border: none;
  cursor: pointer;
  display: flex;
  padding: 0;
}
.line {
  fill: none;
  stroke: rgb(255, 255, 255);
  stroke-width: 6;
  transition: stroke-dasharray 600ms cubic-bezier(0.4, 0, 0.2, 1),
    stroke-dashoffset 600ms cubic-bezier(0.4, 0, 0.2, 1);
}
.line1 {
  stroke-dasharray: 60 207;
  stroke-width: 6;
}
.line2 {
  stroke-dasharray: 60 60;
  stroke-width: 6;
}
.line3 {
  stroke-dasharray: 60 207;
  stroke-width: 6;
}
.opened .line1 {
  stroke-dasharray: 90 207;
  stroke-dashoffset: -134;
  stroke-width: 6;
}
.opened .line2 {
  stroke-dasharray: 1 60;
  stroke-dashoffset: -30;
  stroke-width: 6;
}
.opened .line3 {
  stroke-dasharray: 90 207;
  stroke-dashoffset: -134;
  stroke-width: 6;
}


.btn-primary  {

    background-color: #f4511e;
    color: white;
    padding: 16px 32px;
    text-align: center;
    font-size: 16px;
    margin: 2px 2px;
    opacity: 0.5;
    transition: 0.3s;
    border-radius:15px;
}

.btn-primary:hover {
        opacity: 1
    }
#flag, #conjugate, #allPassEffect {
    background-image: linear-gradient(#7b4397, #dc2430);
    -webkit-appearance: none;
    background-color: black;
    border: 1px solid #cacece;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05), inset 0px -15px 10px -12px rgba(0,0,0,0.05);
    padding: 10px;
    border-radius: 20px;
    display: inline-block;
    position: relative;
}

    #flag:active, #conjugate:active, #allPassEffect:active, .regular-checkbox:checked:active {
        box-shadow: 0 1px 2px rgba(0,0,0,0.05), inset 0px 1px 3px rgba(0,0,0,0.1);
    }

    #flag:checked, #conjugate:checked, #allPassEffect:checked {
        background-color: black;
        border: 1px solid #adb8c0;
        box-shadow: 0 1px 2px rgba(0,0,0,0.05), inset 0px -15px 10px -12px rgba(0,0,0,0.05), inset 15px 10px -12px rgba(255,255,255,0.1);
        color: #99a1a7;
    }

        #flag:checked:after, #conjugate:checked:after, #allPassEffect:checked:after {
            content: '\2714';
            font-size: 14px;
            position: absolute;
            top: 0px;
            left: 3px;
            color: white;
        }
</style >
</head >
<body >