:root {
    font-size: 15px;
    --brand-hue: 200;
    --brand-saturation: 100%;
    --brand-lightness: 50%;

    --accent-hue: 330;
    --accent-saturation: 100%;
    --accent-lightness: 50%;

    --brand: hsl(
        var(--brand-hue),
        var(--brand-saturation),
        var(--brand-lightness)
    );
    --accent: hsl(
        var(--accent-hue),
        var(--accent-saturation),
        var(--accent-lightness)
    );
    --text1-light: hsl(var(--brand-hue), var(--brand-saturation), 10%);
    --text2-light: hsl(var(--brand-hue), 20%, 40%);
    --text3-light: hsl(var(--brand-hue), 30%, 70%);
    --surface1-light: hsl(var(--brand-hue) 25% 90%);
    --surface2-light: hsl(var(--brand-hue) 20% 99%);
    --surface3-light: hsl(var(--brand-hue) 20% 92%);
    --surface4-light: hsl(var(--brand-hue) 20% 85%);
    --surface-shadow-light: 0 2px 8px hsl(var(--brand-hue), 10%, 70%);

    --text1-dark: hsl(var(--brand-hue) 15% 85%);
    --text2-dark: hsl(var(--brand-hue) 5% 65%);
    --text3-dark: hsl(var(--brand-hue) 5% 45%);
    --surface1-dark: hsl(var(--brand-hue) 10% 10%);
    --surface2-dark: hsl(var(--brand-hue) 10% 15%);
    --surface3-dark: hsl(var(--brand-hue) 5% 20%);
    --surface4-dark: hsl(var(--brand-hue) 5% 25%);
    --surface-shadow-dark: 0 2px 8px hsl(var(--brand-hue), 10%, 3%);

    --text1-dim: hsl(var(--brand-hue) 15% 75%);
    --text2-dim: hsl(var(--brand-hue) 15% 65%);
    --text3-dim: hsl(var(--brand-hue) 10% 45%);
    --surface1-dim: hsl(var(--brand-hue) 10% 20%);
    --surface2-dim: hsl(var(--brand-hue) 10% 25%);
    --surface3-dim: hsl(var(--brand-hue) 5% 30%);
    --surface4-dim: hsl(var(--brand-hue) 5% 35%);
    --surface-shadow-dim: 0 2px 8px hsl(var(--brand-hue), 20%, 10%);

    --text1: var(--text1-dark);
    --text2: var(--text2-dark);
    --text3: var(--text3-dark);
    --surface1: var(--surface1-dark);
    --surface2: var(--surface2-dark);
    --surface3: var(--surface3-dark);
    --surface4: var(--surface4-dark);
    --surface-shadow: var(--surface-shadow-dark);
    --brand-hue: 180;
    --brand-saturation: 100%;
    --brand-lightness: 50%;
    --accent-hue: 330;
    --accent-lightness: 50%;
}

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    color: var(--text2);
    -webkit-transition: 150ms ease;
    transition: 150ms ease;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

html,
body {
    background-color: var(--surface1);
    height: 100%;
    width: 100%;
}

input[type="text"],
input[type="number"] {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    outline: none;
    width: 18ch;
    font-size: 1rem;
    padding: 0.5rem;
    border: 1px solid var(--text3);
    border-radius: 0.25rem;
    background-color: var(--surface3);
}

input[type="text"]::-webkit-outer-spin-button,
input[type="text"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type=number] {
    -moz-appearance:textfield;
}

input[type="text"]:focus,
input[type="number"]:focus {
    -webkit-box-shadow: 0 0 0 2px var(--brand);
    box-shadow: 0 0 0 2px var(--brand);
}

input[type="text"][color="accent"]:focus,
input[type="number"][color="accent"]:focus {
    -webkit-box-shadow: 0 0 0 2px var(--accent);
    box-shadow: 0 0 0 2px var(--accent);
}

input[type="text"]:disabled,
input[type="number"]:disabled {
    opacity: 0.5;
    pointer-events: none;
}

input[type="text"]:hover,
input[type="number"]:hover {
    border: 1px solid var(--text2);
}

input[type="text"]:focus,
input[type="number"]:focus {
    -webkit-box-shadow: 0 0 0 2px var(--brand);
    box-shadow: 0 0 0 2px var(--brand);
}

input[type="text"][color="accent"]:focus,
input[type="number"][color="accent"]:focus {
    -webkit-box-shadow: 0 0 0 2px var(--accent);
    box-shadow: 0 0 0 2px var(--accent);
}

input[type="text"]:disabled,
input[type="number"]:disabled {
    opacity: 0.5;
    pointer-events: none;
}

input[type="text"]:hover,
input[type="number"]:hover {
    border: 1px solid var(--text2);
}

input[type="checkbox"] {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    cursor: pointer;
    display: inline-block;
    outline: none;
    height: 1rem;
    width: 1rem;
    border: 1px solid var(--text3);
    background-color: var(--surface3);
    position: relative;
}

input[type="checkbox"]::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    border-radius: 50%;
    opacity: 0.3;
}

input[type="checkbox"]:hover::after {
    -webkit-box-shadow: 0 0 0 0.75rem var(--text3);
    box-shadow: 0 0 0 0.75rem var(--text3);
}

input[type="checkbox"]:disabled {
    opacity: 0.5;
    pointer-events: none;
}

input[type="checkbox"]:checked {
    background-color: var(--brand);
    border: 1px solid var(--brand);
}

input[type="checkbox"][color="accent"]:checked {
    background-color: var(--accent);
    border: 1px solid var(--accent);
}

input[type="checkbox"]:checked::before {
    content: "\2714";
    font-size: 1rem;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    line-height: 0.9;
    color: var(--surface2);
    z-index: 2;
}

input[type="radio"] {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    cursor: pointer;
    display: inline-block;
    outline: none;
    height: 1rem;
    width: 1rem;
    border: 1px solid var(--text3);
    background-color: var(--surface3);
    position: relative;
    border-radius: 50%;
}

input[type="radio"]::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    border-radius: 50%;
    opacity: 0.3;
}

input[type="radio"]:disabled::after {
    display: none;
}

input[type="radio"]:disabled {
    opacity: 0.5;
    pointer-events: none;
}

input[type="radio"]:hover::after {
    -webkit-box-shadow: 0 0 0 0.75rem var(--text3);
    box-shadow: 0 0 0 0.75rem var(--text3);
}

input[type="radio"]:checked {
    border: 4px solid var(--brand);
    background-color: var(--text1);
}

input[type="radio"][color="accent"]:checked {
    border: 4px solid var(--accent);
}

input[type="checkbox"][role="switch"] {
    width: calc(3rem + 4px);
    height: calc(1.5rem + 4px);
    border-radius: 2rem;
    position: relative;
    border: none;
    background-color: inherit;
    -webkit-box-shadow: inset 0 0 10px 10px rgba(0, 0, 0, 0.1);
    box-shadow: inset 0 0 10px 10px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--surface3);
    --transformX: 3px;
}

input[type="checkbox"][role="switch"]::after {
    all: unset !important;
}

input[type="checkbox"][role="switch"]::before {
    content: "" !important;
    display: block;
    width: calc(50% - 4px);
    height: calc(100% - 6px);
    border-radius: 50%;
    background-color: var(--surface3);
    -webkit-transform: translate(var(--transformX), 3px);
    transform: translate(var(--transformX), 3px);
    -webkit-box-shadow: var(--surface-shadow);
    box-shadow: var(--surface-shadow);
}

input[type="checkbox"][role="switch"]:checked {
    background-color: var(--brand);
}

input[type="checkbox"][role="switch"][color="accent"]:checked {
    background-color: var(--accent);
}

input[type="checkbox"][role="switch"]:checked::before {
    --transformX: calc(100% + 6px);
}

input[type="checkbox"][role="switch"]:disabled {
    pointer-events: none;
    opacity: 0.5;
}

input[type="range"] {
    --track-fill: 0%;
    --thumb-offset: 0rem;
    --thumb-color: var(--brand);
    width: 18ch;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    height: 6px;
    border-radius: 1rem;
    background-color: var(--surface4);
    cursor: pointer;
    -webkit-transition: 200ms ease;
    transition: 200ms ease;
    border: none;
}

input[type="range"]:hover {
    --thumb-offset: 0.65rem;
}

input[type="range"]::-webkit-slider-runnable-track {
    height: 6px;
    border-radius: 1rem;
    background: -webkit-gradient(
        linear,
        left top,
        right top,
        from(var(--thumb-color)),
        color-stop(0%, transparent)
    );
    background: linear-gradient(
        to right,
        var(--thumb-color) var(--track-fill),
        transparent 0%
    );
}

input[type="range"]::-moz-range-track {
    height: 6px;
    background: linear-gradient(
        to right,
        var(--thumb-color) var(--track-fill),
        transparent 0%
    );
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 1.2rem;
    height: 1.2rem;
    border-radius: 50%;
    border: 3px solid var(--surface4);
    background-color: var(--thumb-color);
    position: relative;
    top: -6px;
    -webkit-box-shadow: 0 0 0 var(--thumb-offset) rgba(0, 0, 0, 0.2);
    box-shadow: 0 0 0 var(--thumb-offset) rgba(0, 0, 0, 0.2);
    -webkit-transition: 100ms ease;
    transition: 100ms ease;
}

input[type="range"]::-moz-range-thumb {
    -moz-appearance: none;
    appearance: none;
    width: 1.2rem;
    height: 1.2rem;
    border-radius: 50%;
    border: 3px solid var(--surface4);
    background-color: var(--thumb-color);
    position: relative;
    top: -6px;
    box-shadow: 0 0 0 var(--thumb-offset) rgba(0, 0, 0, 0.2);
    -webkit-transition: 100ms ease;
    transition: 100ms ease;
}

input[type="range"][color="accent"] {
    --thumb-color: var(--accent);
}

input[type="color"] {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    border: none;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 0 3px var(--text3);
}
input[type="color"]::-webkit-color-swatch-wrapper {
    border-radius: 50%;
    padding: 0;
}
input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 50%;
}
input[type="color"]::-moz-color-swatch-wrapper {
    border-radius: 50%;
    padding: 0;
}
input[type="color"]::-moz-color-swatch {
    border: none;
    border-radius: 50%;
}

select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background: url(./assets/down-white.svg) no-repeat;
    background-size: 10%;
    background-position: 95% 55%;
    cursor: pointer;
    /* NOTE: 
        the dropdown icon is not visible 
        until you assign it in javascript
        according to the current theme. 
        Example:
            const selects = document.querySelectorAll("select");
            selects.forEach((select) => {
                const selectIconColor = theme != "light" ? "down-white" : "down";
                select.style.backgroundImage = `url(./${selectIconColor}.svg)`;
                select.style.backgroundRepeat = `no-repeat`;
            } */
    outline: none;
    width: 18ch;
    font-size: 1rem;
    padding: 0.5rem;
    border: 1px solid var(--text3);
    border-radius: 0.25rem;
    background-color: var(--surface3);
}

select::-webkit-outer-spin-button,
select::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

select:focus {
    -webkit-box-shadow: 0 0 0 2px var(--brand);
    box-shadow: 0 0 0 2px var(--brand);
}

select[color="accent"]:focus {
    -webkit-box-shadow: 0 0 0 2px var(--accent);
    box-shadow: 0 0 0 2px var(--accent);
}

select:disabled {
    opacity: 0.5;
    pointer-events: none;
}

select:hover {
    border: 1px solid var(--text2);
}

select:focus {
    -webkit-box-shadow: 0 0 0 2px var(--brand);
    box-shadow: 0 0 0 2px var(--brand);
}

select[color="accent"]:focus {
    -webkit-box-shadow: 0 0 0 2px var(--accent);
    box-shadow: 0 0 0 2px var(--accent);
}

select:disabled {
    opacity: 0.5;
    pointer-events: none;
}

select:hover {
    border: 1px solid var(--text2);
}

option {
    font-size: 1rem;
    color: var(--text1);
}

button,
a[role="button"] {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    width: auto;
    padding: 0.5rem !important;
    outline: none;
    border: none;
    border-radius: 0.25rem;
    font-size: 1rem;
    width: auto;
    outline: none;
    border: none;
    border-radius: 0.25rem;
    font-size: 1rem;
    color: var(--text1);
    background: -webkit-gradient(
        linear,
        left top,
        left bottom,
        from(var(--surface3)),
        to(var(--surface2))
    );
    background: linear-gradient(to bottom, var(--surface3), var(--surface2));
    cursor: pointer;
    border: 1px solid var(--surface4);
}

button:hover,
a[role="button"]:hover {
    text-decoration: none;
}

button:hover,
a[role="button"]:hover {
    -webkit-box-shadow: 0 0 0 1px var(--text3);
    box-shadow: 0 0 0 1px var(--text3);
}

button:active,
a[role="button"]:active {
    -webkit-box-shadow: 0 0 0 1px var(--brand);
    box-shadow: 0 0 0 1px var(--brand);
    background: -webkit-gradient(
        linear,
        left top,
        left bottom,
        from(var(--surface2)),
        to(var(--surface3))
    );
    background: linear-gradient(to bottom, var(--surface2), var(--surface3));
}

button[color="primary"],
a[role="button"][color="primary"] {
    width: auto;
    padding: 0.5rem !important;
    outline: none;
    border: none;
    border-radius: 0.25rem;
    font-size: 1rem;
    color: var(--surface1);
    background: var(--brand) !important;
    border: none;
}

button[color="primary"]:hover,
a[role="button"][color="primary"]:hover {
    text-decoration: none;
}

button[disabled] {
    pointer-events: none;
    opacity: .3;
}

button[color="primary"]:hover,
a[role="button"][color="primary"]:hover {
    background-color: var(--brand);
}

button[color="accent"],
a[role="button"][color="accent"] {
    width: auto;
    padding: 0.5rem !important;
    outline: none;
    border: none;
    border-radius: 0.25rem;
    font-size: 1rem;
    color: white;
    background: var(--accent) !important;
    border: none;
}

button[color="accent"]:hover,
a[role="button"][color="accent"]:hover {
    text-decoration: none;
}

button[color="accent"]:hover,
a[role="button"][color="accent"]:hover {
    background-color: var(--accent);
}


.dropdown {
    position: relative;
    display: inline-block;
    width: 200px;
}
.dropdown-toggler {
    appearance: none;
    outline: none;
    border: none !important;
    width: 100%;
    text-align: left;
    padding: .5rem 2rem .5rem 1rem !important;
    position: relative;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.dropdown-toggler::after {
    content: '';
    position: absolute;
    border: 6px solid transparent;
    border-top-color: inherit;
    right: 1rem;
    top: calc(50% + 3px);
    transform: translateY(-50%);
}
.dropdown-toggler.active::after {
    border-color: transparent;
    border-bottom-color: inherit;
    top: calc(50% - 3px);
}

.dropdown-menu {
    background-color: var(--surface2);
    color: inherit;
    box-shadow: 0 4px 24px 4px rgba(0, 0, 0, 0.4);
    list-style: none;
    border-radius: 0 0 .3rem .3rem;
    width: 100%;
    max-height: 250px;
    overflow: auto;
    scroll-behavior: smooth;
    position: absolute;
    z-index: 100;
    top: calc(100% + .3rem);
}

.dropdown-menu ul[role="group"] > label {
    font-weight: normal;
    display: block;
    padding: .75rem 1rem;
    font-size: 1rem;
    pointer-events: none !important;
    cursor: none !important;
    color: var(--text1);
}
.dropdown-menu ul[role="group"] > li {
    padding-left: 2rem;
}
.dropdown-menu li {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    padding: .75rem 1rem;
    font-weight: normal;
    font-size: 1rem;
    cursor: pointer;
}
.dropdown-menu::-webkit-scrollbar-thumb {
    background-color: var(--surface3);
}

.dropdown-menu li:hover {
    background-color: var(--surface1);
    color: var(--brand);
}

a[role="button"] {
    text-align: center;
}

body {
    display: -ms-grid;
    display: grid;
    -ms-grid-rows: auto 1fr;
    grid-template-rows: auto 1fr;
}

a {
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}
a:active {
    background-color: none;
    background: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text1);
}
p {
    line-height: 175%;
}
/* =================== APP STYLING =========================== */
.avatar {
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    border: 2px solid var(--text2);
}

.animate-text-gradient {
    background-image: linear-gradient(92deg, #f35626, #feab3a);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    -webkit-animation: hue 3s infinite linear;
    animation: hue 3s infinite linear;
}

@-webkit-keyframes hue {
    from {
        -webkit-filter: hue-rotate(0deg);
    }
    to {
        -webkit-filter: hue-rotate(-360deg);
    }
}

@keyframes hue {
    from {
        -webkit-filter: hue-rotate(0deg);
    }
    to {
        -webkit-filter: hue-rotate(-360deg);
    }
}

nav .links a:hover {
    text-decoration: none;
    background-color: var(--surface3);
}

#desktop-nav a:hover {
    text-decoration: none;
}
::-webkit-scrollbar {
    width: 5px;
}

/* Track */
::-webkit-scrollbar-track {
    background: var(--surface3);
}

/* Handle */
::-webkit-scrollbar-thumb {
    background: var(--accent);
}

a.activeRoute {
    background-color: var(--surface3);
    color: var(--brand) !important;
}

.hover-none:hover {
    text-decoration: none;
}

@keyframes breath {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.3);
    }
    100% {
        transform: scale(1);
    }
}

.node {
    border: 1px solid var(--surface4);
    box-shadow: none;
    position: relative;
    box-sizing: content-box;
    will-change: transform, filter, background;
}

.destination, .start {
    background-color: var(--text1);
    border-radius: 50%;
    animation: breath 2s infinite ease;
    z-index: 2;
    cursor: grab;
    transform: scale(1.3);
}
.destination::after, .start::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    background-color: var(--surface1);
    top: 2px;
    bottom: 2px;
    left: 2px;
    right: 2px;
}
.destination::before, .start::before {
    content: '';
    position: absolute;
    border-radius: 50%;
    background-color: var(--text1);
    top: 6px;
    bottom: 6px;
    right: 6px;
    left: 6px;
    z-index: 2;
}
.start, .start::before {
    background-color: lime !important;
}
.destination, .destination::before {
    background-color: var(--accent) !important;
}
.destination::after {
    background-color: var(--text1) !important;
}
.target-node {
    transform: scale(2);
    border: 1px dotted white;
    border-radius: 50%;
    z-index: 3;
}
.wall {
    background-color: var(--surface4);
    animation: pop 500ms ease;
}
.obstacle {
    background: url(./assets/weight.png) no-repeat;
    background-size: 100%;
    background-position: center !important;
    animation: pop 500ms ease;
}

.visited {
    background: radial-gradient(yellow, orange);
    /* background-color: orange; */
    border: 1px solid orange;
    border-right: none;
    animation: visit 1s ease;
    transition: 200ms ease;
    will-change: transform, filter;
}

.path {
    background-image: none;
    background-color: var(--brand);
    border: 1px solid var(--brand);
    animation: path 1.5s ease;
}

.visited-obstacle {
    background: url(./assets/weight.png) no-repeat;
    background-color: orange;
    background-size: 100%;
    background-position: center;
    animation: pop 1s ease;
}

.path-obstacle {
    --bcolor: hsl(var(--brand-hue), 67%, 45%);
    background: url(./assets/weight.png) no-repeat;
    background-color: var(--bcolor);
    border: 1px solid var(--bcolor);
    background-size: 100%;
    background-position: center;
    animation: path 1.5s ease;
}

@keyframes visit {
    0% {
        filter: brightness(.5);
        transform: scale(.5);
    }
    50% {
        filter: brightness(1.3);
        transform: scale(1.1);
    }
    60% {
        filter: brightness(1.5);
    }
    100% {
        filter: brightness(1);
        transform: scale(1);
    }
}

@keyframes path {
    from {
        background-color: var(--accent);
    }
    to {
        background-color: var(--brand);
    }
}
@keyframes pop {
    from {
        transform: scale(.5);
        filter: brightness(.3);
    }
    to {
        transform: scale(1);
        filter: brightness(1);
    }
}