:root {
  /* Dark theme (default) */
  --bg-page: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --text-primary: #424242;
  --text-secondary: #aaa;
  --accent-color: #675c4d;
  --hover-bg: #aaa;
  --hover-text: #424242;
  --item-bg: #eee;
}

[data_theme="light"] {
  /* Light theme */
  --bg-page: #eee;
  --accent-color: #8b7355;
  --hover-bg: #3d3d3d;
  --hover-text: #eee;
  --item-bg: #2d2d2d;
}

body {
    background-color: var(--bg-page);
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    user-select: none;
}

.topnav {
    background-color: var(--bg-secondary);
    overflow: hidden;
    margin: 10px 20%;
    border-radius: 10px;
}

.topnav a {
    float: left;
    display: block;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
    color: var(--text-secondary);
    cursor: pointer;
}

.topnav a.active {
    background-color: var(--accent-color);
    color: var(--text-secondary);
}

.topnav a:hover, .topnav a.active:hover, .dropdown:hover .dropbtn {
    background-color: var(--hover-bg);
    color: var(--hover-text);
}

.topnav a.right {
    float: right;
}

.topnav a.hidden,
#tf_data_form {
    display: none;
}

.topnav a.icon {
    display: none;
    height: 48px;
    width: 48px; /* Make it square, matching with the height of the navbar */
    padding: 0;
    position: relative;
}

.hamburger,
.hamburger:before,
.hamburger:after {
    position: absolute;
    width: 20px;
    height: 2px;
    background: var(--text-secondary);
    transition: all .2s ease-out;
    transform-origin: center;
}

.hamburger {
    top: 50%;
    left: 30%;
    right: 70%;
}

.hamburger:before,
.hamburger:after {
    content: '';
    left: 0;
    width: 100%;
}

.hamburger:before {
    top: -6px;
}

.hamburger:after {
    top: 6px;
}

.topnav.responsive .hamburger {
    background: transparent;
}

.topnav.responsive .hamburger:before {
    transform: rotate(-45deg);
    top: 0;
}

.topnav.responsive .hamburger:after {
    transform: rotate(45deg);
    top: 0;
}

.page_content {
    color: var(--text-primary);
    background-color: #aaa;
    margin: 5% 20%;
    font-size: 150%;
    text-align: center;
    padding: 20px;
    border-radius: 20px;
}

input[type=text] {
    width: 90%;
    margin: 10px;
    border-radius: 5px;
}

input[type=checkbox] {
    margin-right: 10px;
}

label {
    display: block;
    margin-bottom: 10px;
}

.manager {
    margin: 20px;
}

.form_group {
    margin-bottom: 15px;
}

.form_group label {
    display: block;
    margin-bottom: 5px;
}

.form_group input[type=text] {
    width: 50%;
}

.list ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.item {
    background-color: var(--item-bg);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    border-radius: 5px;
    padding: 10px;
    margin-bottom: 10px;
}

.item button {
    margin-left: 10px;
    padding: 5px 10px;
    background-color: #ff4444;
    color: white;
    border: 2px black solid;
    border-radius: 3px;
    cursor: pointer;
}

.item button:hover {
    background-color: #ff6666;
    border: 2px black solid;
    box-shadow: 0 0 10px black;
}

button.btn {
    cursor: pointer;
    color: var(--text-primary);
    background-color: mediumseagreen;
    border: 2px var(--bg-secondary) solid;
    border-radius: 10px;
    padding: 10px 20px;
    font-size: 150%;
    margin: 10px;
}

button.btn:hover {
    background-color: lightgreen;
    box-shadow: 0 0 10px var(--bg-secondary);
}

button#submit_tf_btn {
    margin-top: 10px;
    font-size: 250%;
    padding: 10px 20px;
    border-radius: 10px;
    background-color: var(--accent-color);
    color: var(--hover-bg);
    border: var(--text-primary) solid 2px;
}

button#submit_tf_btn:hover {
    background-color: var(--hover-bg);
    color: var(--accent-color);
    box-shadow: 0 0 20px var(--accent-color);
}

#new_tf_output {
    margin: 20px;
    width: 90%;
    padding: 10px 20px;
    border-radius: 10px;
}

.slider {
    -webkit-appearance: none;
    width: 100%;
    height: 10px;
    border-radius: 5px;
    background: var(--bg-secondary);
    outline: none;
    opacity: .7;
    -webkit-transition: .2s;
    transition: opacity .2s;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
}

.slider::-webkit-slider-thumb,
.slider::-moz-range-thumb {
    width: 25px;
    height: 25px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
}

.dropdown {
    float: left;
    overflow: hidden;
}

.dropdown .dropbtn {
    font-size: 17px;
    border: none;
    outline: none;
    color: var(--text-secondary);
    padding: 14px 16px;
    background-color: inherit;
    font-family: inherit;
    margin: 0;
}

.dropdown_content {
    display: none;
    position: absolute;
    background-color: var(--bg-secondary);
    min-width: 160px;
    box-shadow: 0 8px 16px 0 rgba(0,0,0,.2);
    z-index: 1;
    border-radius: 10px;
    margin: 40px;
}

.dropdown_content a {
    float: none;
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    text-align: left;
    cursor: pointer;
    border-radius: 10px;
    border: 5px var(--bg-secondary) solid;
}

.dropdown_content a:hover {
    background-color: var(--hover-bg);
    color: var(--hover-text);
}

.dropdown:hover .dropdown_content {
    display: block;
    margin: 40px;
    border-radius: 10px;
}

select,
option {
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    border: 2px var(--bg-secondary) solid;
    border-radius: 10px;
}

select {
    width: 100%;
    padding: 10px;
    margin: 10px;
    font-size: 150%;
}

.loader {
    background-image: url("img/logo.png");
    background-size: cover;
    background-position: center;
    background-color: var(--bg-secondary);
    border-radius: 50%;
    position: relative;
    width: 256px;
    height: 256px;
    left: 50%;
    transform: translate(-50%, 0);
}

.loader:before , .loader:after{
    content: '';
    border-radius: 50%;
    position: absolute;
    inset: 0;
    box-shadow: 0 0 20px 5px var(--bg-page) inset;
}
.loader:after {
  box-shadow: 0 10px 10px var(--accent-color) inset;
  animation: rotate 1s linear infinite;
}

@keyframes rotate {
  0% {  transform: rotate(0) }
  100% { transform: rotate(360deg) }
}

footer {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    text-align: center;
    padding: 10px;
}

@media screen and (max-width: 1000px) {
    .topnav,
    .topnav.responsive {
        position: relative;
        margin: 2%;
    }
    .topnav a:not(:first-child), .topnav .dropdown,
    .topnav .dropdown,
    .topnav .dropdown .dropbtn,
    .topnav.responsive a.hidden {
        display: none;
    }
    .topnav a.icon {
        display: block;
        position: absolute;
        right: 0;
        top: 0;
    }
    .topnav a.icon:hover {
        background-color: var(--hover-text);
    }
    .topnav.responsive a,
    .topnav.responsive .dropdown {
        text-align: left;
        float: none;
        display: block;
    }
    .page_content {
        margin: 2%;
    }
    div#new_tf_container {
        width: 100%;
    }
    .dropdown .dropdown_content {
        display: block;
        position: relative;
        margin: 0;
        width: 100%;
    }
    .dropdown_content a.sub_active {
        background-color: var(--accent-color);
        color: var(--text-secondary);
    }
    .dropdown_content a {
        border-radius: 0;
        border: none;
    }
    .dropdown_content a:hover {
        background-color: var(--hover-bg);
        color: var(--hover-text);
    }
    .dropdown:hover .dropdown_content {
        display: block;
        margin: 0;
        padding: 0;
    }
}