Код:

:root {
    --bg-header: url(https://forumstatic.ru/files/001c/bc/49/88923.webp);
    --bg-footer: url(https://forumstatic.ru/files/001c/bc/49/49122.png);
    --bg-main: url(https://forumstatic.ru/files/001c/bc/49/86124.webp);
    --icon-new: url(https://forumstatic.ru/files/001c/bc/49/37261.png);
    --icon-old: url(https://forumstatic.ru/files/001c/bc/49/61188.png);
    --cat-bg: url(https://forumstatic.ru/files/001c/bc/49/77555.png);
    --canvas-primary: 199, 199, 199;
    --canvas-tertiary: 194, 194, 194;
    --canvas-secondary: 222, 222, 222;
    --canvas-secondary-rgb: 242, 242, 242;
    --canvas-quarternary: 226, 226, 226;
    --text-primary: 0, 0, 0;
    --text-secondary: 55, 55, 55;
    --text-tertiary: 103, 103, 103;
    --canvas-post-body: 233, 233, 233;
    --accent: 143, 107, 75;
    --accent-secondary: 148, 68, 63;
    --light-accent: 164, 142, 107;
    --gray-main: 255, 255, 255;
    --gray-second: 238, 238, 238;
    --gray-text: 115, 115, 115;
    --link-text: 179, 158, 131;
    --text-dark-accent: 44, 57, 78;
    --white: 255, 255, 255;
    --text-color-secondary: 34, 42, 53;
    --bg-navlinks: 120, 139, 123;
    --bg-profile: 237, 237, 237;
    --quote-code: 194, 194, 194;
    --menu: 218, 223, 229;
    --box-shadow-news: 2px 5px 6px 0px rgba(34, 42, 53, 0.3), 0px 0px 8px 0px rgba(255, 255, 255, 0.8) inset;
    --post-body-color: rgba(222, 222, 222, 1);
    --cat-color: 47, 47, 47;
    --quote-bg: 242, 242, 238;

    --border-bg-gray: #4D4D4D;
    --border-2px: 2px solid var(--border-bg-gray);
    --border-1px: 1px solid rgba(162, 162, 162, 1);
    --border-accent: 1px solid rgb(var(--accent));
    --border-gray: 1px solid #BEBFC2;
    --bradius: 5px;
    --black: #000000;
    --anim-hover: ease-in-out .4s;

    /* Шрифты */
    --font-main: "Roboto", sans-serif;
    --font-second-sa: "Roboto", sans-serif;
    --font-cat-title: "Spectral";
    --font-third: "Inter Tight", sans-serif;
    --font-cat: 400 16px var(--font-main);
    --font-second: 400 10px var(--font-second-sa);
    --font-reserve: "Pragmatica", sans-serif;
    --font-onemore: "Pragmatica", sans-serif;
    --font-nano: "Pragmatica", sans-serif;

    --fw100: 100;
    --fw400: 400;
    --fw500: 500;
    --fw600: 600;
    --fw700: 700;
    --fw800: 800;
    --fw900: 900;

    --fs8: 8px;
    --fs9: 9px;
    --fs10: 10px;
    --fs11: 11px;
    --fs12: 12px;
    --fs13: 13px;
    --fs14: 14px;
    --fs16: 16px;
    --fs18: 18px;
    --fs20: 20px;
    --fs22: 22px;

    --bradius-minor: 4px;
    --bradius-medium: 10px;
    --bradius-major: 100px;
    --bradius-top: 10px 10px 0 0;
    --bradius-bottom: 0 0 10px 10px;

    --fa: 'Font Awesome 6 Pro';
}

:root[data-scheme="medium"] {
    --bg-header: url(https://forumstatic.ru/files/001c/bc/49/96411.webp);
    --bg-footer: url(https://forumstatic.ru/files/001c/bc/49/58659.png);
    --bg-main: url(https://forumstatic.ru/files/001c/bc/49/76913.webp);
    --icon-new: url(https://forumstatic.ru/files/001c/bc/49/24446.png);
    --icon-old: url(https://forumstatic.ru/files/001c/bc/49/69108.png);
    --cat-bg: url(https://forumstatic.ru/files/001c/bc/49/80786.png);
    --canvas-primary: 159, 159, 159;
    --canvas-tertiary: 134, 134, 134;
    --canvas-secondary: 215, 215, 215;
    --canvas-secondary-rgb: 242, 242, 242;
    --canvas-quarternary: 226, 226, 226;
    --text-primary: 0, 0, 0;
    --text-secondary: 55, 55, 55;
    --text-tertiary: 103, 103, 103;
    --canvas-post-body: 233, 233, 233;
    --accent: 143, 107, 75;
    --border-1px: 1px solid rgba(162, 162, 162, 1);
    --menu: 22, 22, 22;
    --text-color-secondary: 149, 149, 149;
    --bg-profile: 51, 55, 58;
    --bg-navlinks: 74, 71, 68;
    --canvas-secondary-rgb: 36, 39, 40;
    --selection: 44, 66, 74;
    --quote-bg: 173, 171, 171;
    --gray-main: 155, 155, 155;
}


:root[data-scheme="dark"] {
    --bg-header: url(https://forumstatic.ru/files/001c/bc/49/13933.png);
    --bg-footer: url(https://forumstatic.ru/files/001c/bc/49/58659.png);
    --bg-main: url(https://forumstatic.ru/files/001c/bc/49/76913.webp);
    --icon-new: url(https://forumstatic.ru/files/001c/bc/49/24446.png);
    --icon-old: url(https://forumstatic.ru/files/001c/bc/49/69108.png);
    --cat-bg: url(https://forumstatic.ru/files/001c/bc/49/80786.png);
    --canvas-primary: 51, 51, 51;
    --canvas-secondary: 39, 39, 39;
    --canvas-quarternary: 175, 175, 175;
    --canvas-post-body: 43, 46, 48;
    --text-primary: 235, 235, 235;
    --canvas-tertiary: 24, 24, 24;
    --text-secondary: 166, 166, 166;
    --accent: 117, 124, 151;
    --light-accent: 84, 92, 104;
    --border-1px: 1px solid rgba(70, 70, 70, 1);
    --menu: 22, 22, 22;
    --post-body-color: rgba(32, 32, 32, 1);
    --text-color-secondary: 149, 149, 149;
    --bg-profile: 51, 55, 58;
    --bg-navlinks: 74, 71, 68;
    --canvas-secondary-rgb: 36, 39, 40;
    --selection: 44, 66, 74;
    --quote-bg: 173, 171, 171;
    --gray-main: 155, 155, 155;
}