:root {
    --font-family: Plus_Jakarta_Sans;
    --header-height: 86px;
}

#input-toggle-theme ~ * {
	--accent-color: #ffb917;
	--accent-color-2: #ffe6ac;
	--accent-color-alpha: #ffb91722;
    --page-margin: max(calc(100vw/2 - 1600px/2), 140px);
    --page-content-margin: 16px;
	--text-color: #444;
	--link-text-color: var(--text-color);
	--button-text-color: var(--link-text-color);
	--bg-color: #fffcf5;
	--bg-color-dark: #171512;
/*	--second-bg-color: #f4f4f4;*/
	--second-bg-color: #e0e0e0;
    --box-shadow: 1px 0 10px 1px #ddd;
    --button-box-shadow: var(--box-shadow);
    --hover-box-shadow: 1px 0 10px 1px #ccc;
	--header-bg-color: #fffef9;
	--header-bg-color: var(--menu-bg-color);
	--header-bg-color: none;
	--menu-bg-color: none;
	--footer-bg-color: var(--header-bg-color);
    --footer-box-shadow: 0 0 6px 0 var(--header-shadow-color);
    --footer-box-shadow: none;
    --header-shadow-color: rgba(0, 0, 0, 0.1);
    --header-box-shadow: 1px 0 10px 1px var(--header-shadow-color);
    --header-box-shadow: none;
    --header-position: relative;
    --bg-selected-hover: #f4f1eb;
    --icon-fill: hsl(210 10% 30%);
}

#input-toggle-theme:checked ~ * {
	--accent-color: #ffb917;
	--accent-color-alpha: #ffb91744;
	--accent-color-2: #bd8400;
	--text-color: #DFDFDF;
	--link-text-color: #DFDFDF;
	--bg-color: var(--bg-color-dark) !important;
	--second-bg-color: #383838;
    --box-shadow: 1px 0 10px 1px #0b0b0b;
    --hover-box-shadow: 1px 0 10px 1px #3a3a3a;
	--header-bg-color: none;
	--accent-color: #d4980f;
    --header-shadow-color: rgba(64, 64, 64, 0.3);
    --header-box-shadow: none;
    /* --footer-bg-color: #141414; */
    --bg-selected-hover: #444;
}

#input-toggle-theme:checked ~ * .adjust-brightness {
    filter: brightness(90%);
}

* {
    box-sizing: border-box;
}

html, body {
    font-family: var(--font-family);
    font-size: 1.1em;
    margin: 0;
    padding: 0;
    scroll-behavior: smooth;
    background-color: var(--bg-color);
}

body > .page-background {
    min-height: 100vh;
    width: 100%;
/*    overflow-y: hidden;*/
    contain: style;
    background-color: var(--bg-color);
    color: var(--text-color);
    accent-color: var(--accent-color);
    transition: all 0.2s ease-in-out;
}

header {
    align-items: center;
    background-color: var(--header-bg-color);
    box-sizing: border-box;
    box-shadow: var(--header-box-shadow);
    display: flex;
    flex-direction: row;
    height: 0;
    justify-content: space-between;
    margin: 0;
    padding: 0 var(--page-margin);
    position: var(--header-position);
    top: 0;
    width: 100%;
    z-index: 10;
    transition: all 0.2s ease-in-out;
/*    margin-bottom: var(--header-height);*/
/*    transform: translateY(calc(var(--header-height)/2));*/
    height: var(--header-height);
}

header menu {
    z-index: 10;
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    background-color: var(--menu-bg-color);
    transition: background-color 0.2s ease-in-out;
    top: 0;
}

header .right-panel {
    position: relative;
    z-index: 100;
    padding-left: 4px !important;
    padding-right: 2px !important;
    align-items: center;
    column-gap: 12px;
}

@media (max-width: 900px) {
    header .right-panel {
        column-gap: 2px;
    }
}

header menu li > a {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
}

header menu a {
    font-size: 0.91em;
    padding: 10px 16px;
    font-weight: 500;
}

header menu img {
    height: 32px;
    margin-left: 4px;
    transition: transform 0.2s ease-in-out;
}

header menu li > a:hover img, header menu li > a img:hover {
    transform: scale(1.2);
}

main {
    margin: 0 calc(var(--page-margin) + var(--page-content-margin));
    padding: 0 5%;
}

main > section:first-child {
    /*without sticky header, we don't need a large margin*/
    padding-top: 2px;
}

.center {
    text-align: center;
}

main > section:nth-child(1) {
    padding-top: 0;
}

footer {
    transition: all 0.2s ease-in-out;
    align-items: center;
    background-color: var(--footer-bg-color);
    box-sizing: border-box;
    box-shadow: var(--footer-box-shadow);
    padding: 0 var(--page-margin);
    display: flex;
    flex-direction: column;
    font-size: 0.8em;
    padding-bottom: 12px;
    width: 100%;
    padding-top: 32px;
}

label {
    cursor: pointer;
}

a {
    color: var(--link-text-color);
    cursor: pointer;
    text-decoration: none;
    font-weight: 600;
    width: fit-content;
}

button {
    color: var(--button-text-color);
    cursor: pointer;
    display: block;
    font-family: var(--font-family);
    padding: 6px 0;
    position: relative;
    border: none;
    background: none;
    width: fit-content;
}

.underline {
    position: relative;
    padding: 6px 0;
}

.underline:before {
    --horizontal-padding: 6px;
    --horizontal-offset: calc(var(--horizontal-padding) / 2);
    background-color: var(--accent-color);
    border-radius: 2px;
    content: '';
    left: calc(0px - var(--horizontal-padding));
    
    position: absolute;
    width: calc(100% + calc(var(--horizontal-padding) * 2));
    height: 3px;
    transform: translateX(calc(-50% - var(--horizontal-offset))) scaleX(0);
    bottom: 2px;
    transition: transform 0.15s ease-out;
}

.underline.little:before {
    --horizontal-padding: 4px;
    height: 2.4px;
    bottom: 4px;
}

.underline:hover:before, a:hover > .underline:before, button:hover > .underline:before {
    transition: transform 0.4s cubic-bezier(0.175, 1.5, 0.32, 1.01);
    transform: translateX(calc(0 - var(--horizontal-padding))) scaleX(1);
}

.underline:active:before, a:active > .underline:before {
    transform: translateY(2px);
}

.theme-toggle > * {
    margin: 0;
    --icon-fill: hsl(210 10% 30%);
    --icon-fill-hover: hsl(210 10% 15%);
    --size: calc(1em * 2.4);
    --size: 1.9em;
    block-size: var(--size);
    inline-size: var(--size);
    box-sizing: border-box;
    color-scheme: light;
    cursor: pointer;
    outline-offset: 5px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    display: block;
    padding: 6px;
}

#input-toggle-theme:checked ~ * .theme-toggle > * {
    --icon-fill-hover: #676767;
    --icon-fill: #999999;
}

.theme-toggle svg {
    height: 100%;
    width: 100%;
    stroke-linecap: round;
}

#introduction > *, .introduction > *{
    max-width: 56rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    margin: 0 auto;
}

.introduction >*:first-child {
    margin-top: 64px;
}

.introduction >*:last-child {
    margin-bottom: 64px;
}

.header-prefix {
    font-size: 1.6em;
}

h1 {
    font-size: 3.2em;
    margin-top: 0px;
    margin-bottom: 0;
}

h2 {
    font-size: 1.4em;
    margin: 24px 0;
}

h3 {
    font-size: 1.3em;
    margin: 16px 0;
}

p {
    font-size: 1.04em;
}

.screen {
    max-height: 100%;
    border-radius: 16px;
    border: 6px #484848 solid;
}

input::placeholder,textarea::placeholder {
    color: var(--text-color);
}

input,textarea {
	width: 100%;
	padding: 10px;
	font-size: inherit;
	resize: vertical;
    font-weight: inherit;
    text-decoration: none;
    font-family: inherit;
	outline: none !important;
	background-color: transparent;
	border: 0;
	color: var(--text-color);
	box-sizing: border-box;
}

textarea {
    min-height: 10em;
}

input[type="submit"] {
	align-self: center;
	text-align: center;
	font-size: inherit;
	width: 100%;
	padding: 10px;
	resize: vertical;
    font-weight: inherit;
    text-decoration: none;
    font-family: inherit;
	outline: none !important;
	background-color: var(--accent-color);
	border: 0;
	color: #333;
    opacity: 0.95;
	font-weight: bold;
	border-radius: 14px;
	box-sizing: border-box;
	cursor: pointer;
	transition: all 0.2s;
    letter-spacing: 1px;
    box-shadow: 1px 0 2px 1px var(--accent-color);
}

input[type="submit"]:hover {
    box-shadow: 1px 1px 6px 1px var(--accent-color);
}

.input-box {
	border-width: 0 0 3px;
	border-color: #777;
	border-style: solid;
	position: relative;
	color: white;
	margin: max(2vh, 10px) 4px;
}

.input-box::before {
	background-color: var(--accent-color);
	position: absolute;
	bottom: -3px;
	height: 3px;
	content: "";
	width: 0;
	left: 0;
	transition: all 0.2s ease-in-out;
    border-radius: 2px;
}

.input-box:focus-within::before {
	width: calc(100% + 2px);
	left: -1px;
}

#input-toggle-theme:checked ~ * .rounded-icon {
	background-color: #333;
}

.rounded-icon {
	width: 1.2rem;
	height: 1.2rem;
	box-sizing: content-box;
	padding: 0.8rem;
	background-color: #DDD;
	border-radius: 18px;
	transition: all 0.2s;
    box-shadow: var(--button-box-shadow);
}

button:hover > .rounded-icon, a:hover > .rounded-icon {
    box-shadow: var(--hover-box-shadow);
}

#input-toggle-theme:checked ~ * .rounded-icon img {
	filter: invert(0.2);
}

small {
    font-size: 0.84em;
}

@media (max-width: 1200px) {
    main {
        margin: 0 calc(calc(var(--page-margin) + var(--page-content-margin)) / 4);
    }

    .grid {
        /* --columns: 2; */
    }
    
    #input-toggle-theme ~ * {
        --page-margin: 32px;
    }
}

@media (max-width: 900px) {
    main {
        margin: 0 calc(calc(var(--page-margin) + var(--page-content-margin)) / 8);
    }
    
    #input-toggle-theme ~ * {
        --page-margin: 4px;
    }
}

    
.input-toggle-menu {
    display: none;
}

.small-icon {
    width: 24px;
}

#toTop {
    position: sticky;
    float: right;
    top: calc(100% - 160px);
    margin-right: calc(-1 * var(--page-content-margin) * 4 - 4px);
    z-index: 9;
    transform: rotateZ(180deg);
    background-color: var(--second-bg-color);
    border-radius: 16px;
    box-shadow: var(--button-box-shadow);
    padding: 4px;
    transition: box-shadow 0.2s ease-in-out;
}

#toTop img {
    transition: transform 0.2s ease-in-out;
    transform: translateY(2px);
}

#input-toggle-theme:checked ~ * #toTop img {
    filter: brightness(2);
}

#toTop:hover {
    box-shadow: var(--hover-box-shadow);
}

#toTop:hover img {
    transform: translateY(2px) scale(1.3);
}

.popup-window {
    z-index: 11;
    max-width: calc(100vw - 64px);
    max-height: calc(100vh - 32px);
    padding: 8px 32px 16px 32px;
    border-radius: 32px;
    box-shadow: var(--box-shadow);
    background-color: var(--bg-color);
    border: 12px var(--bg-color) solid;
    border-left-width: 2px;
    border-right-width: 2px;
    scroll-padding: 64px;
}

.popup-window .content > *:last-of-type {
    margin-bottom: 16px;
}

dialog .content {
    flex-grow: 1;
    padding: 4px;
}
/*

.popup-window:before {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: #000;
    opacity: 0;
    transition: opacity 0.2s ease-in-out;
}

.popup-window:target {
    opacity: 1;
    pointer-events: auto;
}

.popup-window:target:before {
    opacity: 0.5;
}*/

.popup-window .header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.popup-window .header h2 {
    font-size: 1.6em;
    margin: 9px 0 18px 0;
}

.popup-window .header img {
    height: 36px;
    width: 36px;
    transition: transform 0.2s ease-in-out;
    
}

.popup-window .header button:hover > img {
    transform: scale(1.2);
}

#input-toggle-theme:checked ~ * .popup-window > .container {
    background-color: var(--second-bg-color);
    box-shadow: 0 0 12px #333;
}

.popup-window .container > * {
    padding: 0 32px 16px 32px;
}

.popup-window .content {
    min-width: 128px;
    max-width: 100%;
    overflow-y: auto;
    overflow-x: hidden;
}

.popup-window .content * {
    max-width: 100%;
}

figure > figcaption {
    text-align: center;
}

@media (max-width: 900px) {
    :root {
        --header-height: 56px;
    }
    html, body {
        font-size: 1.16em;
        font-size: 1.04em;
    }
    .grid {
        --columns: 1;
    }
    
    #input-toggle-theme ~ * {
        --page-margin: 24px;
        --page-content-margin: 0px;
    }
    
    header > * {
        transform: scale(1.3);
    }

    h1 {
        font-size: 2.6em;
    }
    h2 {
        font-size: 1.8em;
    }

    h3 {
        font-size: 1.4em;
        margin: 16px 0;
    }    

    p {
        font-size: 1.16em;
    }
    
    .small-icon {
        width: 24px;
    }

    input,textarea,input[type="submit"] {
        font-size: 0.94em !important;
        padding: 8px;
    }
    
    .popup-window {
        padding: 8px 4px;
    }
    
    .popup-window .content {
        padding: 0 16px;
    }

    #contact > .container > address > ul {
        flex-direction: column;
    }
}