* {
    margin: 0;
    padding: 0;
    user-select: none;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    background-color: gray;
    overflow: hidden;
}




.allRads input[type=radio] {
    display: none;
}

.labelCustom {
    /* background-color: red; */
    border: 5px solid black;
    display: inline-block;
    width: 150px;
    height: 150px;
    margin: 10px;
}

.labelCustom img {
    width: 100%;
    height: 100%;
}

.allRads input[type=radio]:checked+.labelCustom {
    border-color: aqua;
}


#container {
    position: absolute;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

#container div {
    position: absolute;
    background: white;
    display: flex;
    flex-direction: column;
    padding: 2vw 4vw;
    width: 100%;
    max-width: 600px;
    border: 2px solid #1b1b1b;
    border-radius: 10px;
}

#container div h2 {
    text-align: center;
    color: #555;
    font-weight: 800;
    margin-bottom: 20px;
}

#container div h4 {
    color: #555;
    font-weight: 800;
    margin-bottom: 10px;
}

#container div input {
    border: 0;
    margin: 10px 0;
    padding: 20px;
    outline: none;
    background: #f5f5f5;
    font-size: 16px;
}

#container div input[type=text] {
    padding: 12px 20px;
    margin: 8px 0;
    box-sizing: border-box;
    border: 2px solid black;
    border-radius: 4px;
}

#container div button {
    padding: 15px;
    background: #2196F3;
    color: white;
    font-size: 18px;
    border: 0;
    outline: none;
    cursor: pointer;
    width: 150px;
    margin: 20px auto 0;
    border-radius: 30px;
}

.fa-solid {
    position: absolute;
    top: 15px;
    right: 30px;
    height: 10px;
    width: 10px;
    text-align: center;
    font-size: 32px;
    cursor: pointer;
}

.btn {
    position: absolute;
    top: 15px;
    left: 15px;
    height: 45px;
    width: 45px;
    text-align: center;
    background: #1b1b1b;
    border-radius: 3px;
    cursor: pointer;
    transition: left 0.4s ease;
}

.btn.click {
    left: 425px;
}

.btn span {
    color: white;
    font-size: 28px;
    line-height: 45px;
}

.btn.click span:before {
    content: '\f00d'
}

.sidebar.show {
    left: 0px;
}

.sidebar {
    position: fixed;
    width: 400px;
    height: 100%;
    overflow-y: auto;
    left: -400px;
    background: #1b1b1b;
    transition: left 0.4s ease;
}

.sidebar .text {
    color: white;
    font-size: 25px;
    font-weight: 600;
    line-height: 65px;
    text-align: center;
    background: #1e1e1e;
    letter-spacing: 1px;
}

.sidebar .text.smaller {
    font-size: 20px;
    font-weight: 300;
    line-height: 50px;
    padding-left: 80px;
    background: #1b1b1b;
    text-align: left;
}

.sidebar .text.choice {
    font-size: 20px;
    font-weight: 400;
    line-height: 50px;
    padding-left: 80px;
    background: #1b1b1b;
    text-align: left;
}

nav ul {
    background: #1b1b1b;
    height: 100%;
    width: 100%;
    list-style: none;
}

nav ul li {
    line-height: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

nav ul li:last-child {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

nav ul li a {
    position: relative;
    color: white;
    text-decoration: none;
    font-size: 18px;
    padding-left: 40px;
    font-weight: 500;
    display: block;
    width: 100%;
    border-left: 3px solid transparent;
}

nav ul li.active a,
nav ul li.active button {
    color: cyan;
    background: #1b1b1b;
    border-left-color: cyan;
}

nav ul ul {
    position: static;
    display: none;
}

/* Drop Down */

nav ul .feat-show.show {
    display: block;
}

nav ul .serv-show.show1 {
    display: block;
}

nav ul .opt-show.show2 {
    display: block;
}

nav ul .bg-show.show3 {
    display: block;
}

nav ul .learn-show.show4 {
    display: block;
}

nav ul .def-show.show5 {
    display: block;
}

nav ul .allobjs-show.show6 {
    display: block;
}

nav ul .formula-show.show7 {
    display: block;
}

nav ul ul li {
    line-height: 42px;
    border-bottom: none;
}

nav ul ul li a,
nav ul ul li button {
    cursor: pointer;
    font-size: 17px;
    color: #e6e6e6;
    padding-left: 80px;
}

nav ul li ul li a,
nav ul li ul li button {
    color: #e6e6e6;
    border: none;
    background: #1b1b1b;
}

nav ul li.active ul li a,
nav ul li.active ul li button {
    color: #e6e6e6;
    background: #1b1b1b;
    border-left-color: transparent;
}

nav ul ul li a:hover,
nav ul ul li button:hover {
    color: cyan !important;
    background: #1b1b1b !important;
}

nav ul li a span,
nav ul li button span {
    position: absolute;
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
    font-size: 22px;
    transition: transform 0.4s;
}

nav ul li a span.rotate {
    transform: translateY(-50%) rotate(-180deg);
}

/* Checkbox Buttons */

.switch {
    position: relative;
    top: 9px;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    -webkit-transition: .4s;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    -webkit-transition: .4s;
    transition: .4s;
}

input:checked+.slider {
    background-color: #2196F3;
}

input:focus+.slider {
    box-shadow: 0 0 1px #2196F3;
}

input:checked+.slider:before {
    -webkit-transform: translateX(26px);
    -ms-transform: translateX(26px);
    transform: translateX(26px);
}

.slider {
    border-radius: 34px;
}

.slider:before {
    border-radius: 50%;
}

.overlay {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.7);
    transition: opacity 500ms;
    visibility: hidden;
    opacity: 0;
}

/* Popup */
.overlay:target {
    visibility: visible;
    opacity: 1;
}

.popup {
    margin: 70px auto;
    padding: 20px;
    background: #fff;
    border-radius: 5px;
    width: 30%;
    position: relative;
    transition: all 5s ease-in-out;
}

.popup h2 {
    text-align: center;
    margin-top: 0;
    color: #1b1b1b;
}

.popup .close {
    position: absolute;
    top: 20px;
    right: 30px;
    transition: all 200ms;
    font-size: 30px;
    font-weight: bold;
    text-decoration: none;
    color: #1b1b1b;
}

.popup .close:hover {
    color: #2196F3;
}

.popup .content {
    max-height: 30%;
    overflow: auto;
}

@media screen and (max-width: 700px) {
    .box {
        width: 70%;
    }

    .popup {
        width: 70%;
    }
}