:root {
    /* =============================== Fonts =============================== */
    --font-primary: 'Montserrat', sans-serif;
    --font-accent: 'Jura', sans-serif;

    /* ============================== Colors ============================== */
    /* Hues */
    --hue-accent: 184; /* Cyan */
    --hue-error: 0; /* Red */
    --hue-background: 0; /* Black */
    --hue-foreground: 0; /* White */

    /* Hue based colors */
    --color-fg-transparent-slight: hsla(var(--hue-foreground), 0%, 100%, 0.87);
    --color-fg-highlight: hsl(var(--hue-foreground), 0%, 100%);

    --color-bg: hsl(var(--hue-background), 0%, 0%);
    --color-bg-muted-dark: hsl(var(--hue-background), 0%, 23%);
    --color-bg-muted-light: hsl(var(--hue-background), 0%, 49%);
    --color-bg-muted-transparent: hsla(var(--hue-background), 0%, 50%, 0.322);

    --color-accent: hsl(180, 98%, 38%);
    --color-accent-light: hsl(185, 87%, 91%);
    --color-accent-dark: hsl(180, 100%, 24%);

    /* Transparent Hue Variants */
    --color-accent-transparent-dark: hsla(var(--hue-accent), 100%, 29%, 0.161);
    --color-accent-transparent: hsla(var(--hue-accent), 100%, 38%, 0.161);
    --color-accent-transparent-full: hsla(var(--hue-accent), 100%, 50%, 0.161);
    --color-accent-transparent-full-strong: hsla(var(--hue-accent), 100%, 50%, 0.188);

    --color-error-transparent: hsla(var(--hue-error), 100%, 38%, 0.161);
    --color-error-transparent-full: hsla(var(--hue-error), 100%, 50%, 0.161);
    --color-error-transparent-full-strong: hsla(var(--hue-error), 100%, 50%, 0.188);

    /* Gradients for "glass background" */
    --gradient-accent: linear-gradient(145deg, var(--color-accent-transparent), var(--color-accent-transparent-full));
    --gradient-error: linear-gradient(145deg, var(--color-error-transparent), var(--color-error-transparent-full));

    /* Borders */
    --border-accent: 2px solid var(--color-accent-transparent-full-strong);
    --outline-accent: 3px solid var(--color-accent);

    --border-error: 2px solid var(--color-error-transparent-full-strong);

    /* Glow effect */
    --box-shadow-glow-accent: 20px 20px 60px var(--color-accent-transparent-dark), -20px -20px 60px var(--color-accent-transparent-full),
        inset -2px -2px 20px var(--color-accent-transparent-full-strong)
}

.lined-header {
    font-family: var(--font-accent);
    margin-block-start: 0.5em;
    margin-block-end: 0.5em;
}

html {
    scroll-behavior: smooth;
    box-sizing: border-box;
}

*,
*::before,
*::after {
    box-sizing: inherit;
}

body {
    background-color: var(--color-bg);
    color: var(--color-fg-highlight);
    margin: 0;
    padding: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    top: 0;
    left: 0;
    width: 100%;
    padding: 2vh 4vw;
    display: flex;
    align-items: center;
    background-color: var(--color-bg);
    z-index: 2;
    flex: 0 0 auto;
}

.header-item {
    flex: 0 1 auto;
    margin: 0px 5px;
}

nav { 
    font-family: var(--font-accent);
    max-height: 0px;
    min-width: 200px;
    opacity: 0;
    transition: max-height 1s ease-out, opacity 0.5s ease-out,
        padding 0s linear 1s;
    position: absolute;
    padding: 0px 0px;
    overflow: hidden;

    background: var(--gradient-accent);
    border-radius: 5px;
    border: var(--border-accent);
    border-width: 1px;
    box-shadow: var(--box-shadow-glow-accent);
    backdrop-filter: blur(12.6px);
    -webkit-backdrop-filter: blur(12.6px);
}

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

nav li {
    padding: 3px 0px;
}

.nav-group-heading {
    color: var(--color-bg-muted-light);
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.nav-group-heading:before {
    content: "";
    border-bottom: 1px solid;
    margin: 0 2px 0 0;
    flex: 1;
}

nav hr {
    border-color: var(--color-bg-muted-light);
}

nav a {
    text-decoration: none;
    color: var(--color-fg-transparent-slight);
    text-align: center;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    width: 100%;
}

nav a:after {
    content: "";
    border-bottom: 1px solid;
    margin: 0 0 0 5px;
    flex: 0;
    transition: 200ms ease all;
    mask-image: linear-gradient(
        to right,
        var(--color-bg) 0%,
        var(--color-bg) calc(100% - 20px),
        hsla(0, 0%, 100%, 0.322) 100%
    );
    -webkit-mask-image: linear-gradient(
        to right,
        var(--color-bg) 0%,
        var(--color-bg) calc(100% - 20px),
        hsla(0, 0%, 100%, 0.322) 100%
    );
}

nav a:hover:after {
    flex: 1;
    transition: 400ms ease all;
}

#menu:hover nav,
#menu:focus nav {
    max-height: 1000px;
    padding: 25px 25px;
    opacity: 1;
    transition: max-height 1s ease-in, opacity 0.5s ease-in;
}

.logo {
    margin: 0px;
    font-family: var(--font-primary);
    letter-spacing: -4px;
    font-weight: 300;
}

#progress-bar {
    flex: 1;
    width: 100%;
    display: flex;
}

#progress-bar a {
    background-color: var(--color-bg-muted-dark);
    margin: 2px;
    height: 10px;
    width: 100%;
}

#progress-bar .active-view {
    background-color: var(--color-accent-light);
    box-shadow: inset 0px 0px 3px 1px var(--color-accent), 0px 0px 7px 2px var(--color-accent-dark);
}

main {
    overflow-y: scroll;
    overscroll-behavior: contain;
    scroll-snap-type: y mandatory;
    scrollbar-width: thin;
    scrollbar-color: var(--color-accent) var(--color-bg-muted-transparent);
    flex: 1 1 auto;
}

/* ==============================SECTIONS============================== */
section {
    scroll-snap-align: start;
    min-height: 100%;
    padding: 1vh 15vw 100px;
}

div.container {
    display: flex;
    flex-direction: row;
}

div.container.vert {
    display: flex;
    flex-direction: column;
}

div.container > div {
    flex: 1;
}

div.info-column {
    padding: 10px 2vw;
    color: var(--color-fg-transparent-slight);
}

/* ------------------Section Image------------------ */
.preview-image img {
    height: 70vh;
    width: 100%;
    object-fit: cover;
    mask-image: linear-gradient(
        to bottom,
        transparent 0%,
        var(--color-bg) 20px,
        var(--color-bg) calc(100% - 20px),
        transparent 100%
    );
    -webkit-mask-image: linear-gradient(
        to bottom,
        transparent 0%,
        var(--color-bg) 20px,
        var(--color-bg) calc(100% - 20px),
        transparent 100%
    );
}

/* ------------------Section Title------------------ */
.lined-header {
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    mask-image: linear-gradient(
        to right,
        transparent 0%,
        var(--color-bg) 20vw,
        var(--color-bg) calc(100% - 20vw),
        transparent 100%
    );
    -webkit-mask-image: linear-gradient(
        to right,
        transparent 0%,
        var(--color-bg) 20vw,
        var(--color-bg) calc(100% - 20vw),
        transparent 100%
    );
}

.lined-header:before,
.lined-header:after {
    content: "";
    border-bottom: 2px solid;
    margin: 0 8px 0 0;
    flex: 1 0 20vw;
    opacity: 0.4;
}

.lined-header:after {
    margin: 0 0 0 8px;
}

/* ------------------Section Links------------------ */
.header-links {
    display: flex;
    justify-content: space-evenly;
}

.footer-links {
    display: flex;
    justify-content: space-evenly;
    flex-wrap: wrap;
    gap: 1em;
}

.special-btn {
    text-align: center;
    text-decoration: none;
    width: 130px;
    height: 40px;
    color: var(--color-accent);
    border-radius: 2px;
    font-family: var(--font-accent);
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    display: inline-block;
    outline: none;

    padding: 0;
    line-height: 42px;
    border: none;
    background: transparent;

    border-left: 3px solid var(--color-accent);
    border-right: 3px solid var(--color-accent);
}

.special-btn:focus,
.special-btn:hover {
    color: var(--color-fg-highlight);
    box-shadow: none;
}

.special-btn:before,
.special-btn:after {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    height: 3px;
    width: 100%;
    background: var(--color-accent);
    transition: 400ms ease all;
}

.special-btn:after {
    right: inherit;
    top: inherit;
    left: 0;
    bottom: 0;
}

.special-btn:focus:before,
.special-btn:focus:after,
.special-btn:hover:before,
.special-btn:hover:after {
    width: 0;
    transition: 800ms ease all;
}

.special-btn {
    -webkit-transition: background-color 2s ease-out;
    -moz-transition: background-color 2s ease-out;
    -o-transition: background-color 2s ease-out;
    transition: background-color 2s ease-out;
}

/* ------------------Section content------------------ */
strong {
    color: var(--color-accent);
    font-weight: 600;
}

div.info-column {
    font-family: var(--font-primary);
}

li.no-bullet-line {
    list-style: none;
}

/* ------------------About Section------------------ */
.about-me {
    padding: 5vh 10vw;
    font-family: var(--font-primary);
    line-height: 1.2em;
    font-size: 1.3em;
    color: var(--color-fg-transparent-slight);
}

/* ------------------Contact Section------------------ */
form {
    max-width: 25em;
    display: flex;
    flex-direction: column;
    margin: auto;
    align-items: center;
    position: relative;
}

form > * {
    margin: 10px 0px;
}

label.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: 0;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

input,
textarea {
    width: 100%;
    padding: 10px 20px;
    transition: all ease-in-out 100ms;

    color: white;

    background: var(--gradient-accent);
    border-radius: 5px;
    border: var(--border-accent);
}

input:hover,
textarea:hover,
input:focus,
textarea:focus {
    border: var(--border-accent);
    outline: var(--outline-accent);
    background: none;
    background-color: white;
    color: black;
    transition: all ease-in-out 100ms;
}

.error {
    background: var(--gradient-error);
    border-radius: 5px;
    border: var(--border-error);
}

/* ==============================Toasts============================== */
#toaster-oven {
    position: fixed;
    width: 100%;
    max-height: 40vh;
    bottom: 5vh;
    z-index: 100;
    overflow: hidden;
    display: grid;
    justify-items: center;
    justify-content: center;
    gap: 1vh;
    pointer-events: none;
}

.toast {
    color: var(--color-fg-highlight);
    font-family: var(--font-accent);
    padding: 10px 20px;
    max-width: 350px;
    width: 100%;
    text-align: center;

    background: var(--gradient-accent);
    border-radius: 5px;
    border: var(--border-accent);
    box-shadow: var(--box-shadow-glow-accent);
    backdrop-filter: blur(12.6px);
    -webkit-backdrop-filter: blur(12.6px);
}

/* ==============================MOBILE VIEW============================== */
@media (max-aspect-ratio: 4/3) {
    header {
        padding: 0.5vh 2vw;
    }

    section {
        padding: 1vh 2vw 100px;
    }

    div.container.pivot {
        flex-direction: column;
    }

    .preview-image img {
        height: 40vh;
    }

    .about-me {
        padding: 1vh 3vw;
        font-size: 1em;
    }
}