* {
    margin: 0;
	padding: 0;
    box-sizing: border-box;
}

:root {
	/* --burger-background-color: #FFFFFFE6; */
	--background-color: #FFFFFFE6;
	--burger-background-color: #FFFFFFDF;
	--burger-icon-color: #000;
	--text-color: #000;
	--blur-radius: 3px;
	--margin: 10px;
	--sidebar-width: 250px;
	--header-z-index: 200;
	--burger-menu-z-index: 500;
	--global-content-rem: 40rem;
	--min-content-rem: 25rem;
}


@font-face {
  font-family: 'ALS_Sector-Bold';
  src: url('../fonts/ALS_Sector-Bold.otf') format('OpenType');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'ALS_Sector-Regular';
  src: url('../fonts/ALS_Sector-Regular.otf') format('OpenType');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'ALS_Sector-Stencil';
  src: url('../fonts/ALS_Sector-Stencil.otf') format('OpenType');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}


body {
	font-family: "ALS_Sector-regular";
	font-weight: 500;
	line-height: 1.6;
	
	background-image: url(backgrounds/background4.jpg);
	background-size: cover;
	background-repeat: no-repeat;
	background-position: top;
	background-attachment: fixed;
	
	color: var(--text-color);
	min-height: 100vh;
	display: flex;
	justify-content: center;
    align-items: flex-start;
}

p {
	text-align: justify;
	word-break: break-word;
	hyphens: auto;
	text-justify: inter-word;
	margin: .75rem auto;
}

/* проверить, работает ли отсюда */
a {
	color: #006CDC;
}
a:hover {
	color: #002C5B;
}
ul, ol {
	padding-left: 1rem;
}
/* до сюда */

.main-flex-container {
    max-width: calc(var(--sidebar-width) + var(--global-content-rem) + 30px);
	min-width: calc(var(--sidebar-width) + var(--min-content-rem) + 30px);
	width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
	/* border: 2px solid #333333; */
}

.header-flex-container {
	background-color: var(--background-color);
	/* backdrop-filter: blur(var(--blur-radius)); */
    max-width: calc(var(--sidebar-width) + var(--global-content-rem) + 10px);
	min-width: calc(var(--sidebar-width) + var(--min-content-rem) + 10px);
	width: 100%;
	display: flex;
	margin: 10px;
	/* border: 2px solid #333333; */
}

.header {
    color: var(--text-color);
    padding: 20px;
    width: 100%;
    position: relative;
    z-index: var(--header-z-index);
    display: flex;
    align-items: center;
    justify-content: center;
	/* border: 2px solid #333333; */
}

.header h1 {
    flex: 1;
    text-align: center;
    margin: min(2.5%, 1rem);
}

.burger-menu {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    z-index: var(--burger-menu-z-index);
    display: none;
}

#burger-toggle {
    display: none;
}

.burger-icon {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 22px;
    cursor: pointer;
}

.burger-icon span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--burger-icon-color);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

#burger-toggle:checked + .burger-icon span:nth-child(1) {
    transform: translateY(9.5px) rotate(45deg);
}

#burger-toggle:checked + .burger-icon span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

#burger-toggle:checked + .burger-icon span:nth-child(3) {
    transform: translateY(-9.5px) rotate(-45deg);
}

.burger-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
	max-width: 95vw;
	width: 95vw;
    background-color: var(--burger-background-color);
    /* backdrop-filter: blur(var(--blur-radius)); */
    border: 2px solid #333;
    padding: 5px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
    z-index: var(--burger-menu-z-index);
}

#burger-toggle:checked ~ .burger-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.burger-nav ul {
    list-style: none;
    padding: 0;
}
.burger-nav a {
    display: block;
    padding: 8px 2rem;
    color: var(--text-color);
    text-decoration: none;
    white-space: normal;
}
.burger-nav a:hover {
    background-color: rgba(0, 0, 0, 0.06);
}

.sub-flex-container {
	max-width: calc(var(--sidebar-width) + var(--global-content-rem) + 10px);
	min-width: calc(var(--sidebar-width) + var(--min-content-rem) + 10px);
	width: 100%;
    display: flex;
	margin: 0 10px 10px 10px;
    align-items: flex-start;
	/* border: 5px solid #333333; */
}

.sidebar-nav {
    background-color: var(--background-color);
    /* backdrop-filter: blur(var(--blur-radius)); */
    width: var(--sidebar-width);
    flex-shrink: 0;
    align-self: flex-start;
    position: sticky;
    top: 10px;
    padding: 10px 10px 10px 0;
	margin: 0 10px 0 0;
}

.sidebar-nav a {
	color: var(--text-color);
}

.sidebar-nav a:link {
	color: var(--text-color);
}

.sidebar-nav a:visited {
	color: var(--text-color);
}

.content {
    background-color: var(--background-color);
    /* backdrop-filter: blur(var(--blur-radius)); */
		/* ломает блок бургер навигации */
    flex: 1;
	width: 100%;
    padding: 0px min(2.5%, 1rem);
    box-sizing: border-box;
}

@media (prefers-color-scheme: dark) {
	:root {
		--background-color: #00000080;
		--burger-background-color: #000000DF;
		--text-color: #fff;
		--burger-icon-color: #fff;
	}
	
	body {
		background-image: url(backgrounds/dark_background2.webp);
		background-size: cover;
		background-repeat: no-repeat;
		background-position: top;
		background-attachment: fixed;
		
	}
}

@media (max-width: 768px) {
	
	body {
		background-image: url(backgrounds/vertical_background1.jpg);
		/*background-size: cover;
		background-position: center;
		background-attachment: scroll;
		height: 100vh;*/
		background-size: cover;
		background-repeat: no-repeat;
		background-position: top;
		background-attachment: fixed;
	
	
	.header {
		padding: 0;
	}
	
    .main-flex-container {
        max-width: 100%;
        min-width: 0;
        width: 100%;
        border-left: none;
        border-right: none;
        margin: 0;
    }
	
    .header-flex-container {
        max-width: none;
        min-width: 0;
        width: 100%;
        margin: 0 0 10px 0;
        border-radius: 0;
        border-left: none;
        border-right: none;
    }
	
    .sub-flex-container {
        max-width: none;
        min-width: 0;
        width: 100%;
        margin: 0 0 10px 0;
        border-radius: 0;
        border-left: none;
        border-right: none;
        flex-direction: column;
    }
	
	.sidebar-nav {
		display: none;
	}
	
    .burger-menu {
        display: block;
        position: fixed;
        top: 10px;
        left: 10px;
        z-index: var(--burger-menu-z-index);
        transform: none;
    }

    .burger-icon {
		position: fixed;
        width: 26px;
        height: 20px;
    }

    .burger-icon span {
        height: 2.5px;
    }

    #burger-toggle:checked + .burger-icon span:nth-child(1) {
        transform: translateY(8.5px) rotate(45deg);
    }

    #burger-toggle:checked + .burger-icon span:nth-child(3) {
        transform: translateY(-8.5px) rotate(-45deg);
    }

    .burger-nav {
        min-width: 180px;
        left: 0;
        top: calc(100% + 26px);
        padding: 0;
    }

    .burger-nav ul li a {
        padding: 8px 16px;
    }
}


@media (prefers-color-scheme: dark) and (max-width: 768px){ /* никогда не ставить выше других медиа запросов */
	:root {
		--background-color: #00000080;
		--burger-background-color: #000000DF;
		--text-color: #fff;
		--burger-icon-color: #fff;
	}
	
	body {
		background-image: url(backgrounds/dark_vertical_background2.jpg);
		/*background-size: cover;
		background-position: center;
		background-attachment: scroll;
		height: 100vh;*/
		background-size: cover;
		background-repeat: no-repeat;
		background-position: top;
		background-attachment: fixed;
	}
}